From f5209aa4e941c7f3a942ef4a7e256ab432ec98ce Mon Sep 17 00:00:00 2001
From: fauxpark <fauxpark@gmail.com>
Date: Sun, 19 Jan 2020 18:00:32 +1100
Subject: [PATCH] Remove custom backlight code for PS2AVRGB boards (#7775)

* Remove custom backlight code for PS2AVRGB boards

* Remove custom driver setting

* BACKLIGHT_BREATHING goes in config.h, not here

* Don't need to include backlight.c again here either

* Turn on backlight for Canoe

* Disable console on a few boards due to oversize
---
 keyboards/ares/ares.c                         |  34 ++-
 keyboards/ares/config.h                       |   3 +-
 keyboards/ares/rules.mk                       |   2 +-
 keyboards/bfake/bfake.c                       |  35 +--
 keyboards/bfake/config.h                      |   8 +-
 keyboards/bfake/rules.mk                      |   2 +-
 keyboards/donutcables/budget96/budget96.c     |  32 +--
 keyboards/donutcables/budget96/config.h       |   3 +-
 keyboards/donutcables/budget96/rules.mk       |   2 +-
 keyboards/eve/meteor/config.h                 |   3 +-
 keyboards/eve/meteor/meteor.c                 |  33 +--
 keyboards/exclusive/e6v2/le_bmc/config.h      |   3 +
 keyboards/exclusive/e6v2/le_bmc/le_bmc.c      |  33 +--
 keyboards/exclusive/e6v2/le_bmc/rules.mk      |   4 +-
 keyboards/exclusive/e6v2/oe_bmc/config.h      |   3 +
 keyboards/exclusive/e6v2/oe_bmc/oe_bmc.c      |  33 +--
 keyboards/exclusive/e6v2/oe_bmc/rules.mk      |   4 +-
 keyboards/exent/config.h                      |   3 +-
 keyboards/exent/exent.c                       |  23 ++
 keyboards/exent/rules.mk                      |   2 +-
 keyboards/facew/config.h                      |   3 +-
 keyboards/facew/facew.c                       |  37 ++-
 keyboards/facew/rules.mk                      |   2 +-
 keyboards/ft/mars80/config.h                  |   3 +-
 keyboards/ft/mars80/mars80.c                  |  32 +--
 keyboards/gray_studio/hb85/hb85.c             |  31 +--
 keyboards/gray_studio/hb85/rules.mk           |   2 +-
 keyboards/jc65/v32a/config.h                  |   4 +-
 keyboards/jc65/v32a/v32a.c                    |  37 +--
 keyboards/jj40/config.h                       |   2 +-
 keyboards/jj4x4/config.h                      |   2 +-
 keyboards/jj50/backlight.c                    | 213 -----------------
 keyboards/jj50/backlight_custom.h             |  15 --
 keyboards/jj50/breathing_custom.h             | 140 ------------
 keyboards/jj50/config.h                       |   2 +-
 keyboards/jj50/jj50.c                         |  17 --
 keyboards/jj50/rules.mk                       |   2 -
 keyboards/kbdfans/kbdpad/mk1/mk1.c            |  19 +-
 keyboards/mechmini/v1/config.h                |   8 +-
 keyboards/mechmini/v1/rules.mk                |   2 +-
 keyboards/mehkee96/config.h                   |   3 +
 keyboards/mehkee96/mehkee96.c                 |  20 ++
 keyboards/mehkee96/rules.mk                   |   4 +-
 keyboards/panc60/config.h                     |   4 +-
 keyboards/panc60/panc60.c                     |  35 +--
 keyboards/pearl/config.h                      |   3 +-
 keyboards/pearl/pearl.c                       |  31 +--
 keyboards/percent/canoe/canoe.c               |  37 +--
 keyboards/percent/canoe/config.h              |   4 +-
 keyboards/percent/canoe/rules.mk              |   2 +-
 keyboards/percent/skog/backlight.c            | 211 -----------------
 keyboards/percent/skog/backlight_custom.h     |  13 --
 keyboards/percent/skog/breathing_custom.h     | 140 ------------
 keyboards/percent/skog/config.h               |   6 +-
 keyboards/percent/skog/rules.mk               |   4 -
 keyboards/percent/skog/skog.c                 |  26 ++-
 keyboards/percent/skog_lite/config.h          |   4 +-
 keyboards/percent/skog_lite/skog_lite.c       |  32 +--
 keyboards/singa/config.h                      |   4 +-
 keyboards/singa/rules.mk                      |   2 +-
 keyboards/singa/singa.c                       |  33 +--
 keyboards/tgr/alice/alice.c                   |  23 ++
 keyboards/tgr/alice/config.h                  |   3 +
 keyboards/tgr/alice/rules.mk                  |   2 +-
 keyboards/tgr/jane/config.h                   |   3 +-
 keyboards/tgr/jane/jane.c                     |  32 +--
 keyboards/unikorn/config.h                    |   4 +-
 keyboards/unikorn/unikorn.c                   |  33 +--
 keyboards/winkeyless/bface/bface.c            |  31 +--
 keyboards/winkeyless/bface/config.h           |   9 +-
 keyboards/winkeyless/bface/rules.mk           |   2 -
 keyboards/winkeyless/bmini/bmini.c            |  23 ++
 keyboards/winkeyless/bmini/config.h           |   8 +-
 keyboards/winkeyless/bmini/rules.mk           |   2 +-
 keyboards/winkeyless/bminiex/backlight.c      | 211 -----------------
 .../winkeyless/bminiex/backlight_custom.h     |  13 --
 keyboards/winkeyless/bminiex/bminiex.c        |  29 ++-
 .../winkeyless/bminiex/breathing_custom.h     | 140 ------------
 keyboards/winkeyless/bminiex/config.h         |   1 +
 keyboards/winkeyless/bminiex/rules.mk         |   3 -
 keyboards/ymd75/backlight.c                   | 216 ------------------
 keyboards/ymd75/backlight_custom.h            |  15 --
 keyboards/ymd75/breathing_custom.h            | 140 ------------
 keyboards/ymd75/config.h                      |   6 +-
 keyboards/ymd75/rules.mk                      |   6 -
 keyboards/ymd75/ymd75.c                       |  23 +-
 keyboards/ymd96/backlight.c                   | 214 -----------------
 keyboards/ymd96/backlight_custom.h            |  15 --
 keyboards/ymd96/breathing_custom.h            | 140 ------------
 keyboards/ymd96/config.h                      |   8 +-
 keyboards/ymd96/rules.mk                      |   3 -
 keyboards/ymd96/ymd96.c                       |  26 ++-
 keyboards/ymdk/bface/bface.c                  |  27 +--
 keyboards/ymdk/bface/config.h                 |   2 -
 keyboards/ymdk/bface/rules.mk                 |   3 -
 keyboards/ymdk_np21/backlight.c               | 213 -----------------
 keyboards/ymdk_np21/backlight_custom.h        |  15 --
 keyboards/ymdk_np21/breathing_custom.h        | 140 ------------
 keyboards/ymdk_np21/config.h                  |  10 +-
 keyboards/ymdk_np21/rules.mk                  |   3 -
 keyboards/ymdk_np21/ymdk_np21.c               |  23 +-
 101 files changed, 474 insertions(+), 2802 deletions(-)
 delete mode 100644 keyboards/jj50/backlight.c
 delete mode 100644 keyboards/jj50/backlight_custom.h
 delete mode 100644 keyboards/jj50/breathing_custom.h
 delete mode 100644 keyboards/percent/skog/backlight.c
 delete mode 100644 keyboards/percent/skog/backlight_custom.h
 delete mode 100644 keyboards/percent/skog/breathing_custom.h
 delete mode 100644 keyboards/winkeyless/bminiex/backlight.c
 delete mode 100644 keyboards/winkeyless/bminiex/backlight_custom.h
 delete mode 100644 keyboards/winkeyless/bminiex/breathing_custom.h
 delete mode 100644 keyboards/ymd75/backlight.c
 delete mode 100644 keyboards/ymd75/backlight_custom.h
 delete mode 100644 keyboards/ymd75/breathing_custom.h
 delete mode 100644 keyboards/ymd96/backlight.c
 delete mode 100644 keyboards/ymd96/backlight_custom.h
 delete mode 100644 keyboards/ymd96/breathing_custom.h
 delete mode 100644 keyboards/ymdk_np21/backlight.c
 delete mode 100644 keyboards/ymdk_np21/backlight_custom.h
 delete mode 100644 keyboards/ymdk_np21/breathing_custom.h

diff --git a/keyboards/ares/ares.c b/keyboards/ares/ares.c
index 07276491c5137d0c14348160b222a0ea633ee824..e6379cb18da669b7422084f43b66d12782d6ada0 100644
--- a/keyboards/ares/ares.c
+++ b/keyboards/ares/ares.c
@@ -17,27 +17,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "ares.h"
 
-#ifdef BACKLIGHT_ENABLE
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
+}
+
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/ares/config.h b/keyboards/ares/config.h
index f0aa926ea5b501c901b8aad1a695d65a66189abe..c50587db9c49cd12a665eaebda36abd37c1575cf 100644
--- a/keyboards/ares/config.h
+++ b/keyboards/ares/config.h
@@ -37,7 +37,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
diff --git a/keyboards/ares/rules.mk b/keyboards/ares/rules.mk
index 58d36bc67350e2d31a9ea3a2a2398ee55317effc..f540741721d4edd0b7802be16d1c8385c4881329 100644
--- a/keyboards/ares/rules.mk
+++ b/keyboards/ares/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = no
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/bfake/bfake.c b/keyboards/bfake/bfake.c
index 9039fe5465aea15fa243188dd6997d815731957b..eb328ba8336c8c3778b4e08162d098b80ccaf559 100644
--- a/keyboards/bfake/bfake.c
+++ b/keyboards/bfake/bfake.c
@@ -17,30 +17,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "bfake.h"
 
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-	writePinLow(D0);
-	writePinLow(D1);
-	writePinLow(D4);
-	writePinLow(D6);
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
diff --git a/keyboards/bfake/config.h b/keyboards/bfake/config.h
index 65f1f3a759ffcd59725fa554068dc0c4de5b0ab9..7c814ccc9328958cec491209769a4a5da1fe661e 100644
--- a/keyboards/bfake/config.h
+++ b/keyboards/bfake/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef BFAKE_CONFIG_H
-#define BFAKE_CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -38,9 +37,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
-
-#endif
diff --git a/keyboards/bfake/rules.mk b/keyboards/bfake/rules.mk
index 107bb4fa903af0cb85ee5ad6dd50afb726541e2e..ab6af983cee04554abd84a5e2c31aa03ab8ba201 100644
--- a/keyboards/bfake/rules.mk
+++ b/keyboards/bfake/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = yes
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = no
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/donutcables/budget96/budget96.c b/keyboards/donutcables/budget96/budget96.c
index e9125a3e609e22a5551cc46c80d3ebc223b2af3f..7317e24e260733d84fb5fc95bcd32ac4ad7d29cc 100644
--- a/keyboards/donutcables/budget96/budget96.c
+++ b/keyboards/donutcables/budget96/budget96.c
@@ -16,32 +16,22 @@
 
 #include "budget96.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D0);
     setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
-
-    // turn backlight LEDs on
     writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/donutcables/budget96/config.h b/keyboards/donutcables/budget96/config.h
index 127e542f1c6794e8fe5aad6bcbf052c48b6af7fe..dddc8075b19e6189e32efb09c012245912649aca 100644
--- a/keyboards/donutcables/budget96/config.h
+++ b/keyboards/donutcables/budget96/config.h
@@ -37,5 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/donutcables/budget96/rules.mk b/keyboards/donutcables/budget96/rules.mk
index 54328d248d13836f2f20c1ee06cb3845803349b4..84eace5ed6d1b1738ff2550ce90f7d89e3c8d6c8 100644
--- a/keyboards/donutcables/budget96/rules.mk
+++ b/keyboards/donutcables/budget96/rules.mk
@@ -15,7 +15,7 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = no
 MOUSEKEY_ENABLE = yes
 EXTRAKEY_ENABLE = yes
-CONSOLE_ENABLE = yes
+CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
diff --git a/keyboards/eve/meteor/config.h b/keyboards/eve/meteor/config.h
index b23bc877fe9bd6b65bd68c331a4301996b509237..2100c3a4580a5f2e828ad6536ef3e4e293077061 100644
--- a/keyboards/eve/meteor/config.h
+++ b/keyboards/eve/meteor/config.h
@@ -36,4 +36,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
diff --git a/keyboards/eve/meteor/meteor.c b/keyboards/eve/meteor/meteor.c
index f5ecbad02543b1b5f5ba96e972c5b73b27f389ad..ac1ca5d6434b44f08e79f70cbdec6cfb05284ca6 100644
--- a/keyboards/eve/meteor/meteor.c
+++ b/keyboards/eve/meteor/meteor.c
@@ -16,32 +16,19 @@
 
 #include "meteor.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
-    setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-    // turn backlight LEDs on
-    writePinHigh(D0);
+void led_init_ports(void) {
+    setPinOutput(D1);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/exclusive/e6v2/le_bmc/config.h b/keyboards/exclusive/e6v2/le_bmc/config.h
index d0b976c1ec2fdb6923145006ce5ba69bae9a5155..ca680f5029ea3a039d6eb93500f482336d1e4872 100644
--- a/keyboards/exclusive/e6v2/le_bmc/config.h
+++ b/keyboards/exclusive/e6v2/le_bmc/config.h
@@ -45,5 +45,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, C2, C3, C4, C5, D7 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLED_NUM 6
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/exclusive/e6v2/le_bmc/le_bmc.c b/keyboards/exclusive/e6v2/le_bmc/le_bmc.c
index e3b81c81ba43bbd74ca7280b1d65c75163532595..b09e588795cd0556461165540e4f7a69a92bf476 100644
--- a/keyboards/exclusive/e6v2/le_bmc/le_bmc.c
+++ b/keyboards/exclusive/e6v2/le_bmc/le_bmc.c
@@ -16,32 +16,19 @@
 
 #include "le_bmc.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
-    setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-    // turn backlight LEDs on
-    writePinHigh(D0);
+void led_init_ports(void) {
+    setPinOutput(D1);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/exclusive/e6v2/le_bmc/rules.mk b/keyboards/exclusive/e6v2/le_bmc/rules.mk
index 106044ba725758a29dfb5f97e178ccfcff5d71f9..ded651d3d8f74bea50b03b0b07962e1655c57c22 100644
--- a/keyboards/exclusive/e6v2/le_bmc/rules.mk
+++ b/keyboards/exclusive/e6v2/le_bmc/rules.mk
@@ -17,13 +17,13 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
-CONSOLE_ENABLE = yes        # Console for debug(+400)
+CONSOLE_ENABLE = no         # Console for debug(+400)
 COMMAND_ENABLE = yes        # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = no            # USB Nkey Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality on B7 by default
 WS2812_DRIVER = i2c
 RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
 MIDI_ENABLE = no            # MIDI support (+2400 to 4200, depending on config)
diff --git a/keyboards/exclusive/e6v2/oe_bmc/config.h b/keyboards/exclusive/e6v2/oe_bmc/config.h
index fc7c91ca6654d87872151f16a166926d8327af21..a6b56ba003353e47c0688c8c680c52b46ee6895e 100644
--- a/keyboards/exclusive/e6v2/oe_bmc/config.h
+++ b/keyboards/exclusive/e6v2/oe_bmc/config.h
@@ -45,5 +45,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, C2, C3, C4, C5, D7 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLED_NUM 6
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/exclusive/e6v2/oe_bmc/oe_bmc.c b/keyboards/exclusive/e6v2/oe_bmc/oe_bmc.c
index 97d354653f1bb47e2fe94c9f09d031d9d20cc9fc..a0a6c579bdd3b6aefc5c5a5a5daf9a525c7cac44 100644
--- a/keyboards/exclusive/e6v2/oe_bmc/oe_bmc.c
+++ b/keyboards/exclusive/e6v2/oe_bmc/oe_bmc.c
@@ -16,32 +16,19 @@
 
 #include "oe_bmc.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
-    setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-    // turn backlight LEDs on
-    writePinHigh(D0);
+void led_init_ports(void) {
+    setPinOutput(D1);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/exclusive/e6v2/oe_bmc/rules.mk b/keyboards/exclusive/e6v2/oe_bmc/rules.mk
index 106044ba725758a29dfb5f97e178ccfcff5d71f9..ded651d3d8f74bea50b03b0b07962e1655c57c22 100644
--- a/keyboards/exclusive/e6v2/oe_bmc/rules.mk
+++ b/keyboards/exclusive/e6v2/oe_bmc/rules.mk
@@ -17,13 +17,13 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
-CONSOLE_ENABLE = yes        # Console for debug(+400)
+CONSOLE_ENABLE = no         # Console for debug(+400)
 COMMAND_ENABLE = yes        # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 NKRO_ENABLE = no            # USB Nkey Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality on B7 by default
 WS2812_DRIVER = i2c
 RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
 MIDI_ENABLE = no            # MIDI support (+2400 to 4200, depending on config)
diff --git a/keyboards/exent/config.h b/keyboards/exent/config.h
index 08d241f653a1a7133e3baeef8a9c0347b7104d2a..4921746c1c59b5e6417c04b9d0a0282a978c6e37 100644
--- a/keyboards/exent/config.h
+++ b/keyboards/exent/config.h
@@ -39,7 +39,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
diff --git a/keyboards/exent/exent.c b/keyboards/exent/exent.c
index 82066f7e85536ed78ccf8cfb18c4898526bbc8f5..c6870f2c79179a8464ff960745b4e65834ae4b19 100644
--- a/keyboards/exent/exent.c
+++ b/keyboards/exent/exent.c
@@ -15,3 +15,26 @@
  */
 
 #include "exent.h"
+
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    setPinOutput(D6);
+    writePinHigh(D0);
+    writePinHigh(D1);
+    writePinHigh(D6);
+}
+
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
+    }
+    return true;
+}
diff --git a/keyboards/exent/rules.mk b/keyboards/exent/rules.mk
index 10442b31ba6170b72d88b6f08fa2a9c374ef13e8..0ea425ac7e90eb34de42b4361ac9febe24104e02 100644
--- a/keyboards/exent/rules.mk
+++ b/keyboards/exent/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/facew/config.h b/keyboards/facew/config.h
index 9a31f927835d279bfb94b733ea24a74052de8207..0dc35e625889d07a6ad34ddcf8f03a5adf7b4261 100644
--- a/keyboards/facew/config.h
+++ b/keyboards/facew/config.h
@@ -37,5 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/facew/facew.c b/keyboards/facew/facew.c
index fa58f0cf79a123f5b1e4345f7b4b7b0cd45feb9b..fc176466fe39f2f981be371aecc58c397cd5a612 100644
--- a/keyboards/facew/facew.c
+++ b/keyboards/facew/facew.c
@@ -17,30 +17,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "facew.h"
 
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-	writePinLow(D0);
-	writePinLow(D1);
-	writePinLow(D4);
-	writePinLow(D6);
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    writePinHigh(D0);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
diff --git a/keyboards/facew/rules.mk b/keyboards/facew/rules.mk
index c4117d15d7681659725c427ef1b198e43e367969..81cfb758c05c7131fa2396dbcdc16d43e7c46889 100644
--- a/keyboards/facew/rules.mk
+++ b/keyboards/facew/rules.mk
@@ -15,7 +15,7 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = no
 MOUSEKEY_ENABLE = yes
 EXTRAKEY_ENABLE = yes
-CONSOLE_ENABLE = yes
+CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
diff --git a/keyboards/ft/mars80/config.h b/keyboards/ft/mars80/config.h
index 1bf93928725c72cdb58defef0b60b0b171281d41..38c3e851a83d9d9c6263f0b9b20d5cd66935748c 100644
--- a/keyboards/ft/mars80/config.h
+++ b/keyboards/ft/mars80/config.h
@@ -38,7 +38,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
diff --git a/keyboards/ft/mars80/mars80.c b/keyboards/ft/mars80/mars80.c
index 8e512740877f930ef81998a18eb11673c33f6ed0..ca1950353be42e6c64d0d4d4b07dcbfe667b856d 100644
--- a/keyboards/ft/mars80/mars80.c
+++ b/keyboards/ft/mars80/mars80.c
@@ -16,32 +16,22 @@
 
 #include "mars80.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
-    writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/gray_studio/hb85/hb85.c b/keyboards/gray_studio/hb85/hb85.c
index 21562b9e0f0c1d63bbc3ccacd4f81c2f2aa737e4..57f5e6031456cee8d85ef09ec2bdb77789939ee9 100644
--- a/keyboards/gray_studio/hb85/hb85.c
+++ b/keyboards/gray_studio/hb85/hb85.c
@@ -18,32 +18,25 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "hb85.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D0);
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
     writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/gray_studio/hb85/rules.mk b/keyboards/gray_studio/hb85/rules.mk
index ec57b03dcbceede6c47879ceaa0417b39be5d847..79b783e421369ec786f821a44d6e4b0577f0b66a 100644
--- a/keyboards/gray_studio/hb85/rules.mk
+++ b/keyboards/gray_studio/hb85/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/jc65/v32a/config.h b/keyboards/jc65/v32a/config.h
index 5439dbe396b38bce9e4c6a65bf11866a098bf854..392aebc2a4c4bc38f3ea033aa9ae3140f9b6a3ff 100644
--- a/keyboards/jc65/v32a/config.h
+++ b/keyboards/jc65/v32a/config.h
@@ -32,7 +32,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4, C3, C2, D7 }
 #define DIODE_DIRECTION COL2ROW
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLED_NUM 16
 #define RGBLIGHT_ANIMATIONS
 #define RGBLIGHT_HUE_STEP 8
diff --git a/keyboards/jc65/v32a/v32a.c b/keyboards/jc65/v32a/v32a.c
index 2a289872fefc255edcd7905c3513b213ce7745a9..627661a57ca116b6ebeaa53e7fc5dd297f49cf7f 100644
--- a/keyboards/jc65/v32a/v32a.c
+++ b/keyboards/jc65/v32a/v32a.c
@@ -17,32 +17,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "v32a.h"
 
-#ifdef BACKLIGHT_ENABLE
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-	writePinLow(D0);
-	writePinLow(D1);
-	writePinLow(D4);
-	writePinLow(D6);
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/jj40/config.h b/keyboards/jj40/config.h
index 2310ce87e2df3b030c0e243cfd873c5a2679c9ca..90bcacfd1623aa900420309e81a8d591599cf035 100644
--- a/keyboards/jj40/config.h
+++ b/keyboards/jj40/config.h
@@ -35,7 +35,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
-// #define BACKLIGHT_BREATHING  // Requires #4324 to enable hardware pwm for atmega32a
+#define BACKLIGHT_BREATHING
 
 /* RGB underglow */
 // NOTE: for PS2AVRGB boards, underglow commands are sent via I2C to 0xB0.
diff --git a/keyboards/jj4x4/config.h b/keyboards/jj4x4/config.h
index 8918e60dad7e44972479477d74e240f9b1c97114..b3f33d6e7adaae849f38be944ef6060c9ae3fcfa 100644
--- a/keyboards/jj4x4/config.h
+++ b/keyboards/jj4x4/config.h
@@ -38,7 +38,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
-// #define BACKLIGHT_BREATHING  // Requires #4324 to enable hardware pwm for atmega32a
+#define BACKLIGHT_BREATHING
 
 /* RGB underglow */
 // NOTE: for PS2AVRGB boards, underglow commands are sent via I2C to 0xB0.
diff --git a/keyboards/jj50/backlight.c b/keyboards/jj50/backlight.c
deleted file mode 100644
index fbd241fa9dee8314d1af5ae2fff3f7b42343ce21..0000000000000000000000000000000000000000
--- a/keyboards/jj50/backlight.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // D0
-#define CAPSLOCK_PORT   (1 << 1)  // D1
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-
-  // TODO call user defined function
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/jj50/backlight_custom.h b/keyboards/jj50/backlight_custom.h
deleted file mode 100644
index 7210be840e09c82a347b3e1b1ac59d0319577822..0000000000000000000000000000000000000000
--- a/keyboards/jj50/backlight_custom.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifndef BACKLIGHT_CUSTOM_H
-#define BACKLIGHT_CUSTOM_H
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
-#endif  // BACKLIGHT_CUSTOM_H
diff --git a/keyboards/jj50/breathing_custom.h b/keyboards/jj50/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/jj50/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/jj50/config.h b/keyboards/jj50/config.h
index 884a28d5069863814abb1fff09ab0ee16f106fbc..9b9feb0676d9b5ef147a93e4137d7f141283f3d6 100644
--- a/keyboards/jj50/config.h
+++ b/keyboards/jj50/config.h
@@ -38,7 +38,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4 }
 #define DIODE_DIRECTION COL2ROW
 
-//#define BACKLIGHT_PIN D4
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
 
 #define RGB_DI_PIN E2
diff --git a/keyboards/jj50/jj50.c b/keyboards/jj50/jj50.c
index a302adf40509fee7b1201c271bbe44b24565638d..91b10aebee37d5c439f374e446d77b16366ba3a8 100644
--- a/keyboards/jj50/jj50.c
+++ b/keyboards/jj50/jj50.c
@@ -16,20 +16,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "jj50.h"
-
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-void backlight_init_ports(void) {
-    b_led_init_ports();
-}
-
-void backlight_task(void) {
-    b_led_task();
-}
-
-void backlight_set(uint8_t level) {
-    b_led_set(level);
-}
-#endif
diff --git a/keyboards/jj50/rules.mk b/keyboards/jj50/rules.mk
index 62b21e4df23dafd1af0f7d7f4ce2fe87b0a4c987..38faf371629982d512712fd1dbc16ee388af8c85 100644
--- a/keyboards/jj50/rules.mk
+++ b/keyboards/jj50/rules.mk
@@ -29,6 +29,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 #OPT_DEFS = -DDEBUG_LEVEL=0
 
-SRC = backlight.c
-
 LAYOUTS = ortho_5x12
diff --git a/keyboards/kbdfans/kbdpad/mk1/mk1.c b/keyboards/kbdfans/kbdpad/mk1/mk1.c
index aa781875ce0634a395c331774077c6abf11cf368..f5fe47741b08114952165b3671e9425ada3052c6 100644
--- a/keyboards/kbdfans/kbdpad/mk1/mk1.c
+++ b/keyboards/kbdfans/kbdpad/mk1/mk1.c
@@ -16,14 +16,19 @@
 
 #include "mk1.h"
 
-#define NUMLOCK_PIN D0
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-void matrix_init_kb(void) {
-    setPinOutput(NUMLOCK_PIN);
-    matrix_init_user();
+void led_init_ports(void) {
+    setPinOutput(D0);
+    writePinHigh(D0);
 }
 
-void led_set_kb(uint8_t usb_led) {
-    writePin(NUMLOCK_PIN, IS_LED_ON(usb_led, USB_LED_NUM_LOCK));
-    led_set_user(usb_led);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+    }
+    return true;
 }
diff --git a/keyboards/mechmini/v1/config.h b/keyboards/mechmini/v1/config.h
index eb15a368ad58cd1704d9d083f1a91534c7173f03..07422f9ffda9b7da95543663ffb86ab0c19d7b6e 100644
--- a/keyboards/mechmini/v1/config.h
+++ b/keyboards/mechmini/v1/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef V1_CONFIG_H
-#define V1_CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -38,11 +37,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define NO_UART 1
 
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 /* RGB underglow */
 // The RGB_DI_PIN value seems to be shared between all PS2AVRGB boards.
 // The same pin is used on the JJ40, at least.
 #define RGBLED_NUM 16
 #define RGBLIGHT_ANIMATIONS
 #define RGB_DI_PIN E2
-
-#endif
diff --git a/keyboards/mechmini/v1/rules.mk b/keyboards/mechmini/v1/rules.mk
index 1c6252c59bd4397ac1e55f5e0db8a4f1cde6e66c..6f2adc2f8183c9de4c69b780112ca69d56d6abe5 100644
--- a/keyboards/mechmini/v1/rules.mk
+++ b/keyboards/mechmini/v1/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = yes
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/mehkee96/config.h b/keyboards/mehkee96/config.h
index d506626d1e74cca359e28be407c133154545a635..afc9d0a7b17c3eb2cf416983f2311f0f6f88c9aa 100644
--- a/keyboards/mehkee96/config.h
+++ b/keyboards/mehkee96/config.h
@@ -16,6 +16,9 @@
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4, C3, C2, D7 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLED_NUM 16
 #define RGBLIGHT_ANIMATIONS
 /* key combination for command */
diff --git a/keyboards/mehkee96/mehkee96.c b/keyboards/mehkee96/mehkee96.c
index d9e2bac7a5953a7e6fd047c9ff783772ed92cc6d..2da25b6b845f7a5f7ae9e489c83ffe0e6b87e278 100644
--- a/keyboards/mehkee96/mehkee96.c
+++ b/keyboards/mehkee96/mehkee96.c
@@ -16,3 +16,23 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "mehkee96.h"
+
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    writePinHigh(D0);
+    writePinHigh(D1);
+}
+
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
+}
diff --git a/keyboards/mehkee96/rules.mk b/keyboards/mehkee96/rules.mk
index a7d36548f06340d41263d71d9f08e715e79978fb..772706e6cca070b6c99d18fa6efbd6335d51103e 100644
--- a/keyboards/mehkee96/rules.mk
+++ b/keyboards/mehkee96/rules.mk
@@ -17,9 +17,9 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = yes	# Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE = yes	# Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes	# Audio control and System control(+450)
-CONSOLE_ENABLE = yes	# Console for debug(+400)
+CONSOLE_ENABLE = no	# Console for debug(+400)
 COMMAND_ENABLE = yes    # Commands for debug and configuration
-BACKLIGHT_ENABLE = no  # Enable keyboard backlight functionality
+BACKLIGHT_ENABLE = yes  # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/panc60/config.h b/keyboards/panc60/config.h
index c565f39bcc9800206bc98b0983161ad045e09792..b3bcdc97334b1eb9f69add9e8ec3f1b819fa3194 100644
--- a/keyboards/panc60/config.h
+++ b/keyboards/panc60/config.h
@@ -37,5 +37,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/panc60/panc60.c b/keyboards/panc60/panc60.c
index 6bd16a4bdc481e0601a4d71af6c96570018e468b..a200b258784846bf01ad28034e8e24e23afb7814 100644
--- a/keyboards/panc60/panc60.c
+++ b/keyboards/panc60/panc60.c
@@ -16,30 +16,19 @@
 
 #include "panc60.h"
 
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-	writePinLow(D0);
-	writePinLow(D1);
-	writePinLow(D4);
-	writePinLow(D6);
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
diff --git a/keyboards/pearl/config.h b/keyboards/pearl/config.h
index 0ae69e8e2b99322c345d37ae3fc18c66cfdbbc9a..5dbba3ec0d90412caafcf442779feb35ab242197 100644
--- a/keyboards/pearl/config.h
+++ b/keyboards/pearl/config.h
@@ -31,7 +31,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_ANIMATIONS
 #define RGBLED_NUM 12
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 
 #define MATRIX_ROWS 4
 #define MATRIX_COLS 13
diff --git a/keyboards/pearl/pearl.c b/keyboards/pearl/pearl.c
index 093b5fdd93782da6ca0e485acda1077005a47d55..cebbc9fcbacfb3c8af3139e4cf9692d6e151959f 100644
--- a/keyboards/pearl/pearl.c
+++ b/keyboards/pearl/pearl.c
@@ -17,32 +17,25 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "pearl.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D0);
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
     writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/percent/canoe/canoe.c b/keyboards/percent/canoe/canoe.c
index 79c6330fe868fbc6b12da3a8ed03f97b39797b39..d3c66dbf139521197d276d9eb5ab6559969dd034 100644
--- a/keyboards/percent/canoe/canoe.c
+++ b/keyboards/percent/canoe/canoe.c
@@ -17,32 +17,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "canoe.h"
 
-#ifdef BACKLIGHT_ENABLE
-void backlight_set(uint8_t level) {
-	if (level == 0) {
-		// Turn out the lights
-		writePinLow(D0);
-		writePinLow(D1);
-		writePinLow(D4);
-		writePinLow(D6);
-	} else {
-		// Turn on the lights
-		writePinHigh(D0);
-		writePinHigh(D1);
-		writePinHigh(D4);
-		writePinHigh(D6);
-	}
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_init_ports(void) {
-	setPinOutput(D0);
-	setPinOutput(D1);
-	setPinOutput(D4);
-	setPinOutput(D6);
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
+}
 
-	writePinLow(D0);
-	writePinLow(D1);
-	writePinLow(D4);
-	writePinLow(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/percent/canoe/config.h b/keyboards/percent/canoe/config.h
index 950e0806e599ff9bf383a9716d28a4e15b79cacf..21b3dcea6482d8c69ee487331ecd4acdac28dc3b 100644
--- a/keyboards/percent/canoe/config.h
+++ b/keyboards/percent/canoe/config.h
@@ -38,7 +38,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
diff --git a/keyboards/percent/canoe/rules.mk b/keyboards/percent/canoe/rules.mk
index 6340c81224b3afd4f0e619579065bd296856385c..9661eaefeb28d83c9b7e71b9d59e1ec889dff59c 100644
--- a/keyboards/percent/canoe/rules.mk
+++ b/keyboards/percent/canoe/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/percent/skog/backlight.c b/keyboards/percent/skog/backlight.c
deleted file mode 100644
index 94e8126d888eb789b6df75df59a76a96574cef75..0000000000000000000000000000000000000000
--- a/keyboards/percent/skog/backlight.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // D0
-#define CAPSLOCK_PORT   (1 << 1)  // D1
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/percent/skog/backlight_custom.h b/keyboards/percent/skog/backlight_custom.h
deleted file mode 100644
index 51365fe3ba449b1fea07946baad70748934cabe2..0000000000000000000000000000000000000000
--- a/keyboards/percent/skog/backlight_custom.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#pragma once
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
diff --git a/keyboards/percent/skog/breathing_custom.h b/keyboards/percent/skog/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/percent/skog/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/percent/skog/config.h b/keyboards/percent/skog/config.h
index 7a0c703ec9bc690f19f889e0feaeb53a20766a74..15844711f6c1eff3b1daa62294b769a3c5e7e97c 100644
--- a/keyboards/percent/skog/config.h
+++ b/keyboards/percent/skog/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #define VENDOR_ID       0x20A0
 #define PRODUCT_ID      0x422D
@@ -36,8 +35,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLED_NUM 2
 #define RGBLIGHT_ANIMATIONS
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 5
 
 #define NO_UART 1
-
-#endif
diff --git a/keyboards/percent/skog/rules.mk b/keyboards/percent/skog/rules.mk
index da03a2e0c32943b21d02677dfcd8ea63b54917e0..0d243b858107073707d054342fbdcdac25d5c0f5 100644
--- a/keyboards/percent/skog/rules.mk
+++ b/keyboards/percent/skog/rules.mk
@@ -21,11 +21,7 @@ BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
-BACKLIGHT_CUSTOM_DRIVER = yes
-
 OPT_DEFS = -DDEBUG_LEVEL=0
 
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
-
-SRC = backlight.c
diff --git a/keyboards/percent/skog/skog.c b/keyboards/percent/skog/skog.c
index 1c26c550e516fefcd1ffbe22d9c48ce755e9b067..241833937bb80a5018b18b083d6ebbbf10924d11 100644
--- a/keyboards/percent/skog/skog.c
+++ b/keyboards/percent/skog/skog.c
@@ -19,20 +19,22 @@ ps2avrGB support code by Kenneth A. (bminiex/.[ch])
 
 #include "skog.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-  b_led_init_ports();
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_task(void) {
-  b_led_task();
+void led_init_ports(void) {
+    setPinOutput(D1);
+    setPinOutput(D6);
+    writePinHigh(D1);
+    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-  b_led_set(level);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/percent/skog_lite/config.h b/keyboards/percent/skog_lite/config.h
index 97d11238e3b77b7c8dd0160b88a9f7f4f37e2349..ec3928b72e3b5604873e482df16a7b1d8349180d 100644
--- a/keyboards/percent/skog_lite/config.h
+++ b/keyboards/percent/skog_lite/config.h
@@ -38,5 +38,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/percent/skog_lite/skog_lite.c b/keyboards/percent/skog_lite/skog_lite.c
index a6c00f52931f392b2721ae0b18e6c62bfe813d64..e611885a6103ca5442e4393b9fcdb968572659d2 100644
--- a/keyboards/percent/skog_lite/skog_lite.c
+++ b/keyboards/percent/skog_lite/skog_lite.c
@@ -16,32 +16,22 @@
 
 #include "skog_lite.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
-    writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/singa/config.h b/keyboards/singa/config.h
index badaef51365f8c934b055875f069538059db6254..e998e6ea96db197e50b6586ac9a7591f252b02ba 100644
--- a/keyboards/singa/config.h
+++ b/keyboards/singa/config.h
@@ -37,5 +37,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/singa/rules.mk b/keyboards/singa/rules.mk
index 54328d248d13836f2f20c1ee06cb3845803349b4..84eace5ed6d1b1738ff2550ce90f7d89e3c8d6c8 100644
--- a/keyboards/singa/rules.mk
+++ b/keyboards/singa/rules.mk
@@ -15,7 +15,7 @@ BOOTLOADER = bootloadHID
 BOOTMAGIC_ENABLE = no
 MOUSEKEY_ENABLE = yes
 EXTRAKEY_ENABLE = yes
-CONSOLE_ENABLE = yes
+CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
diff --git a/keyboards/singa/singa.c b/keyboards/singa/singa.c
index 144065d02953e713ad32328f11b259cb54949563..7b60e3c29d802e54edccd1e5eda7f0c41e151648 100644
--- a/keyboards/singa/singa.c
+++ b/keyboards/singa/singa.c
@@ -16,32 +16,19 @@
 
 #include "singa.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
-    setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-    // turn backlight LEDs on
-    writePinHigh(D0);
+void led_init_ports(void) {
+    setPinOutput(D1);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/tgr/alice/alice.c b/keyboards/tgr/alice/alice.c
index 39aed2cf5676d972211fdf2e37965a48ca38c298..9fb4957ac89537b5758a39202e80ae4b42254f91 100644
--- a/keyboards/tgr/alice/alice.c
+++ b/keyboards/tgr/alice/alice.c
@@ -16,3 +16,26 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "alice.h"
+
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    setPinOutput(D6);
+    writePinHigh(D0);
+    writePinHigh(D1);
+    writePinHigh(D6);
+}
+
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
+    }
+    return true;
+}
diff --git a/keyboards/tgr/alice/config.h b/keyboards/tgr/alice/config.h
index 4c36896b709a8d107ed32053b109b02292095307..1f1b32d4e3f9ad31cbe0f121f1fc61fa02a78a6f 100644
--- a/keyboards/tgr/alice/config.h
+++ b/keyboards/tgr/alice/config.h
@@ -33,6 +33,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4, C3, C2, D7 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #define RGBLED_NUM 18
 #define RGBLIGHT_ANIMATIONS
 
diff --git a/keyboards/tgr/alice/rules.mk b/keyboards/tgr/alice/rules.mk
index 530e8ea329797b937a9d84265db3c03a4d8577b3..a8fea7efa7f74c60298b92f39a05690f8738879c 100644
--- a/keyboards/tgr/alice/rules.mk
+++ b/keyboards/tgr/alice/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/tgr/jane/config.h b/keyboards/tgr/jane/config.h
index dd119d3b04a56f3ab87fb2b52125be7c684f3d98..5fb9a90560ac57fa7687abbd9adbd9098ac52ee7 100644
--- a/keyboards/tgr/jane/config.h
+++ b/keyboards/tgr/jane/config.h
@@ -36,4 +36,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
diff --git a/keyboards/tgr/jane/jane.c b/keyboards/tgr/jane/jane.c
index 4ab0b300735e05c14572f8770526da17d47adc2d..24183a0f7b91c2bce707b5dac04c0c690bbb74e6 100644
--- a/keyboards/tgr/jane/jane.c
+++ b/keyboards/tgr/jane/jane.c
@@ -16,32 +16,22 @@
 
 #include "jane.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
-    writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/unikorn/config.h b/keyboards/unikorn/config.h
index 1c4f3431a0b379c10852c583c30293595385e8c2..e6bdbe7f2fc48b4ded5e586204b3ecad90973473 100644
--- a/keyboards/unikorn/config.h
+++ b/keyboards/unikorn/config.h
@@ -36,7 +36,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DIODE_DIRECTION COL2ROW
 #define DEBOUNCE 5
 
-#define BACKLIGHT_LEVELS 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
+
 #ifdef RGBLIGHT_ENABLE
 #define RGBLED_NUM 17
 #define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/unikorn/unikorn.c b/keyboards/unikorn/unikorn.c
index 70bc5a988f4391e2b18762b606570eeb65315059..26a5092a59cda20b126930d8300efaeb51de4820 100644
--- a/keyboards/unikorn/unikorn.c
+++ b/keyboards/unikorn/unikorn.c
@@ -16,32 +16,19 @@
 
 #include "unikorn.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
-    setPinOutput(D0);
-    setPinOutput(D1);
-    setPinOutput(D4);
-    setPinOutput(D6);
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-    // turn backlight LEDs on
-    writePinHigh(D0);
+void led_init_ports(void) {
+    setPinOutput(D1);
     writePinHigh(D1);
-    writePinHigh(D4);
-    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
+    return true;
 }
diff --git a/keyboards/winkeyless/bface/bface.c b/keyboards/winkeyless/bface/bface.c
index 8cb5b600cdd766f6f10e995bb1d99dbf2004561b..49e8bbcd2d42651b41aa3fbf2cf375e1b1cd777d 100644
--- a/keyboards/winkeyless/bface/bface.c
+++ b/keyboards/winkeyless/bface/bface.c
@@ -16,32 +16,25 @@
 
 #include "bface.h"
 
-void backlight_init_ports(void) {
-    // initialize pins D0, D1, D4 and D6 as output
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
     setPinOutput(D0);
     setPinOutput(D1);
-    setPinOutput(D4);
     setPinOutput(D6);
-
-    // turn backlight LEDs on
     writePinHigh(D0);
     writePinHigh(D1);
-    writePinHigh(D4);
     writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-    if (level == 0) {
-        // turn backlight LEDs off
-        writePinLow(D0);
-        writePinLow(D1);
-        writePinLow(D4);
-        writePinLow(D6);
-    } else {
-        // turn backlight LEDs on
-        writePinHigh(D0);
-        writePinHigh(D1);
-        writePinHigh(D4);
-        writePinHigh(D6);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
     }
+    return true;
 }
diff --git a/keyboards/winkeyless/bface/config.h b/keyboards/winkeyless/bface/config.h
index 95d44557a51ac96889df2ad47e15837346097cb3..7ada9a49ac062f1d56d34bde550e4db9c6b13edb 100644
--- a/keyboards/winkeyless/bface/config.h
+++ b/keyboards/winkeyless/bface/config.h
@@ -42,10 +42,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define NO_UART 1
 
-#ifdef BACKLIGHT_ENABLE
-	// the backlight PWM does not work (yet). Therefore, we only have two backlight levels (on/off)
-	#define BACKLIGHT_LEVELS 1
-	#define LED_PIN PORTD
-	#define BACKLIGHT_PORT_NUM (1 << 4)
-#endif
-
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
diff --git a/keyboards/winkeyless/bface/rules.mk b/keyboards/winkeyless/bface/rules.mk
index 506e37ac9c0269767e53535b7d9d383143c8f2cb..84eace5ed6d1b1738ff2550ce90f7d89e3c8d6c8 100644
--- a/keyboards/winkeyless/bface/rules.mk
+++ b/keyboards/winkeyless/bface/rules.mk
@@ -18,8 +18,6 @@ EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_CUSTOM_DRIVER = yes
-BACKLIGHT_BREATHING = no
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/winkeyless/bmini/bmini.c b/keyboards/winkeyless/bmini/bmini.c
index f44fd36a8cc743698592fcb53159c51dece9adb2..fe3b74be133f328c7232ac2b679a47ab2312b173 100644
--- a/keyboards/winkeyless/bmini/bmini.c
+++ b/keyboards/winkeyless/bmini/bmini.c
@@ -16,3 +16,26 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "bmini.h"
+
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
+
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    setPinOutput(D6);
+    writePinHigh(D0);
+    writePinHigh(D1);
+    writePinHigh(D6);
+}
+
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
+    }
+    return true;
+}
diff --git a/keyboards/winkeyless/bmini/config.h b/keyboards/winkeyless/bmini/config.h
index f8a26e4f00497657413a858b18dc8988e201bff9..95c44be9a428ef85b5e42ef11f48a9954da666de 100644
--- a/keyboards/winkeyless/bmini/config.h
+++ b/keyboards/winkeyless/bmini/config.h
@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef BMINI_CONFIG_H
-#define BMINI_CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -37,6 +36,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGBLIGHT_ANIMATIONS
 
-#define NO_UART 1
+#define BACKLIGHT_PIN D4
+#define BACKLIGHT_LEVELS 3
 
-#endif
+#define NO_UART 1
diff --git a/keyboards/winkeyless/bmini/rules.mk b/keyboards/winkeyless/bmini/rules.mk
index 530e8ea329797b937a9d84265db3c03a4d8577b3..a8fea7efa7f74c60298b92f39a05690f8738879c 100644
--- a/keyboards/winkeyless/bmini/rules.mk
+++ b/keyboards/winkeyless/bmini/rules.mk
@@ -17,7 +17,7 @@ MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-BACKLIGHT_ENABLE = no
+BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 
diff --git a/keyboards/winkeyless/bminiex/backlight.c b/keyboards/winkeyless/bminiex/backlight.c
deleted file mode 100644
index 94e8126d888eb789b6df75df59a76a96574cef75..0000000000000000000000000000000000000000
--- a/keyboards/winkeyless/bminiex/backlight.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // D0
-#define CAPSLOCK_PORT   (1 << 1)  // D1
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/winkeyless/bminiex/backlight_custom.h b/keyboards/winkeyless/bminiex/backlight_custom.h
deleted file mode 100644
index 51365fe3ba449b1fea07946baad70748934cabe2..0000000000000000000000000000000000000000
--- a/keyboards/winkeyless/bminiex/backlight_custom.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#pragma once
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
diff --git a/keyboards/winkeyless/bminiex/bminiex.c b/keyboards/winkeyless/bminiex/bminiex.c
index 11315b92107304eaa77287767fe2d98abe52760b..365aeee2b24fc4a583d14941610eb18ea0da22bf 100644
--- a/keyboards/winkeyless/bminiex/bminiex.c
+++ b/keyboards/winkeyless/bminiex/bminiex.c
@@ -17,20 +17,25 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "bminiex.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-  b_led_init_ports();
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_task(void) {
-  b_led_task();
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    setPinOutput(D6);
+    writePinHigh(D0);
+    writePinHigh(D1);
+    writePinHigh(D6);
 }
 
-void backlight_set(uint8_t level) {
-  b_led_set(level);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+        writePin(D6, !led_state.scroll_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/winkeyless/bminiex/breathing_custom.h b/keyboards/winkeyless/bminiex/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/winkeyless/bminiex/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/winkeyless/bminiex/config.h b/keyboards/winkeyless/bminiex/config.h
index 037ca002840b0aa194a2e899997d7eada619071c..8952796a813d59f636e0355c551fa46c5e9625a6 100644
--- a/keyboards/winkeyless/bminiex/config.h
+++ b/keyboards/winkeyless/bminiex/config.h
@@ -36,6 +36,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGBLIGHT_ANIMATIONS
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 5
 
 #define NO_UART 1
diff --git a/keyboards/winkeyless/bminiex/rules.mk b/keyboards/winkeyless/bminiex/rules.mk
index 2c999dcbf6f4427423a1da55eb97ff8e48b877c3..df7124400f9635375804736d7e3adc62731863b4 100644
--- a/keyboards/winkeyless/bminiex/rules.mk
+++ b/keyboards/winkeyless/bminiex/rules.mk
@@ -19,7 +19,6 @@ CONSOLE_ENABLE = no
 DEBUG_ENABLE = no
 COMMAND_ENABLE = no
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_CUSTOM_DRIVER = yes
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
 TAP_DANCE_ENABLE = no
@@ -28,5 +27,3 @@ TAP_DANCE_ENABLE = no
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-
-SRC += backlight.c
diff --git a/keyboards/ymd75/backlight.c b/keyboards/ymd75/backlight.c
deleted file mode 100644
index cb0a979234d04452813b7a58c77567ffaedd2088..0000000000000000000000000000000000000000
--- a/keyboards/ymd75/backlight.c
+++ /dev/null
@@ -1,216 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- Modified by Wayne K Jones (github.com/WarmCatUK) 2018
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-//#define NUMLOCK_PORT    (1 << 2)  // 2nd pin of Port D (digital)
-#define CAPSLOCK_PORT   (1 << 1)  // 1st pin
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-//#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    /*
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-     */
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-    /*
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-     */
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-
-  // TODO call user defined function
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymd75/backlight_custom.h b/keyboards/ymd75/backlight_custom.h
deleted file mode 100644
index 7210be840e09c82a347b3e1b1ac59d0319577822..0000000000000000000000000000000000000000
--- a/keyboards/ymd75/backlight_custom.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifndef BACKLIGHT_CUSTOM_H
-#define BACKLIGHT_CUSTOM_H
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
-#endif  // BACKLIGHT_CUSTOM_H
diff --git a/keyboards/ymd75/breathing_custom.h b/keyboards/ymd75/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/ymd75/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymd75/config.h b/keyboards/ymd75/config.h
index 00f6bd292c05ad28d277401c919bac0c40c07457..88916be62f8e433476d36b77b7a413780bb49cc0 100644
--- a/keyboards/ymd75/config.h
+++ b/keyboards/ymd75/config.h
@@ -17,8 +17,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -39,6 +38,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4, C3, C2, D7 }
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
 
 #define RGB_DI_PIN E2
@@ -49,5 +49,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_VAL_STEP 18
 
 #define NO_UART 1
-
-#endif
diff --git a/keyboards/ymd75/rules.mk b/keyboards/ymd75/rules.mk
index eb41e19cf3c35142401bb588d63487dc663baaf9..9d584b2b418be7d749fe1ac099dbf7c3d529d06e 100644
--- a/keyboards/ymd75/rules.mk
+++ b/keyboards/ymd75/rules.mk
@@ -23,14 +23,8 @@ WS2812_DRIVER = i2c
 NKRO_ENABLE = no
 # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 
-
 DISABLE_WS2812 = no
 
 KEY_LOCK_ENABLE = yes
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
-
-
-#OPT_DEFS = -DDEBUG_LEVEL=0
-
-SRC = backlight.c
diff --git a/keyboards/ymd75/ymd75.c b/keyboards/ymd75/ymd75.c
index e32a745bfd01329631d3b7fc5176e9409c04ba8f..1c5c380390249c4b0d497ff9c55dfc1390cb8763 100644
--- a/keyboards/ymd75/ymd75.c
+++ b/keyboards/ymd75/ymd75.c
@@ -17,20 +17,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "ymd75.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-    b_led_init_ports();
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_task(void) {
-    b_led_task();
+void led_init_ports(void) {
+    setPinOutput(D1);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-    b_led_set(level);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/ymd96/backlight.c b/keyboards/ymd96/backlight.c
deleted file mode 100644
index f3f2b7a05b4556816eafb372cf8e38c346eae698..0000000000000000000000000000000000000000
--- a/keyboards/ymd96/backlight.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // 0th pin of Port D (digital)
-#define CAPSLOCK_PORT   (1 << 1)  // 1st pin
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-//#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-  /* YMD96 does not have scroll lock led  
-   if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }*/
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-
-  // TODO call user defined function
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymd96/backlight_custom.h b/keyboards/ymd96/backlight_custom.h
deleted file mode 100644
index 7210be840e09c82a347b3e1b1ac59d0319577822..0000000000000000000000000000000000000000
--- a/keyboards/ymd96/backlight_custom.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifndef BACKLIGHT_CUSTOM_H
-#define BACKLIGHT_CUSTOM_H
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
-#endif  // BACKLIGHT_CUSTOM_H
diff --git a/keyboards/ymd96/breathing_custom.h b/keyboards/ymd96/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/ymd96/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymd96/config.h b/keyboards/ymd96/config.h
index 1232f90c28be21b97d1179db9e1448f9d21a2604..d761e60379751b89320407824a4c80284d54ac86 100644
--- a/keyboards/ymd96/config.h
+++ b/keyboards/ymd96/config.h
@@ -18,8 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "config_common.h"
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #define VENDOR_ID       0x20A0
 #define PRODUCT_ID      0x422D
@@ -38,8 +37,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
-// #define BACKLIGHT_BREATHING  // works, but BL_TOGG might not work
+#define BACKLIGHT_BREATHING
 
 #define TAPPING_TOGGLE 3
 
@@ -55,5 +55,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /*#define RGBLIGHT_VAL_STEP 20
 
 #define NO_UART 1*/
-
-#endif
diff --git a/keyboards/ymd96/rules.mk b/keyboards/ymd96/rules.mk
index 3c892daabb61513db9e2ba95f224fac9a0c04f5d..b7571649bdd6585f559d25cf7caa2826e07fe050 100644
--- a/keyboards/ymd96/rules.mk
+++ b/keyboards/ymd96/rules.mk
@@ -19,7 +19,6 @@ CONSOLE_ENABLE = no
 COMMAND_ENABLE = no
 
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_CUSTOM_DRIVER = yes
 
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
@@ -30,5 +29,3 @@ KEY_LOCK_ENABLE = yes
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-
-SRC = backlight.c
diff --git a/keyboards/ymd96/ymd96.c b/keyboards/ymd96/ymd96.c
index eae84ade1948571b6595bfa9f009efb624335982..c81435e45af02f539e3f405e9e720afd8c401786 100644
--- a/keyboards/ymd96/ymd96.c
+++ b/keyboards/ymd96/ymd96.c
@@ -18,20 +18,22 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "ymd96.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-  b_led_init_ports();
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_task(void) {
-  b_led_task();
+void led_init_ports(void) {
+    setPinOutput(D0);
+    setPinOutput(D1);
+    writePinHigh(D0);
+    writePinHigh(D1);
 }
 
-void backlight_set(uint8_t level) {
-  b_led_set(level);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+        writePin(D1, !led_state.caps_lock);
+    }
+    return true;
 }
-#endif
diff --git a/keyboards/ymdk/bface/bface.c b/keyboards/ymdk/bface/bface.c
index 8622fd5238c78857d0038fba31bd3aa252d12d4f..e2810409a8da43786e53f3accf199b88c3c6a675 100644
--- a/keyboards/ymdk/bface/bface.c
+++ b/keyboards/ymdk/bface/bface.c
@@ -16,26 +16,19 @@
  */
 #include "quantum.h"
 
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
+}
 
-void keyboard_pre_init_kb(void){
-    //init the CAPS LOCK LED pin as an output
+void led_init_ports(void) {
     setPinOutput(D1);
-    //init the Backlight Pin as an output
-    setPinOutput(D4);
-    //call any user initialization code
-    keyboard_pre_init_user();
+    writePinHigh(D1);
 }
 
-void led_set_kb(uint8_t usb_led){
-    //control the caps lock LED
-    if(IS_LED_ON(usb_led, USB_LED_CAPS_LOCK)){
-        //set led pin to high
-        writePinHigh(D1);
-    } else {
-        //set to low
-        writePinLow(D1);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D1, !led_state.caps_lock);
     }
-    //call any user LED functions
-    led_set_user(usb_led);
+    return true;
 }
-
diff --git a/keyboards/ymdk/bface/config.h b/keyboards/ymdk/bface/config.h
index 2273b7e84e621b9bfd78c0048c3eee467b85c7b2..a8c8a21493f91ad9250293dc62f28115381f66b6 100644
--- a/keyboards/ymdk/bface/config.h
+++ b/keyboards/ymdk/bface/config.h
@@ -40,5 +40,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define BACKLIGHT_PIN       D4
 #define BACKLIGHT_LEVELS    6
-
-
diff --git a/keyboards/ymdk/bface/rules.mk b/keyboards/ymdk/bface/rules.mk
index f6f026cf30023ebf4b3ca249ffa93006396cfa76..6320071ab8ae3713b1db9684a490a02b42d2e674 100644
--- a/keyboards/ymdk/bface/rules.mk
+++ b/keyboards/ymdk/bface/rules.mk
@@ -18,9 +18,6 @@ EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_CUSTOM_DRIVER = no
-BACKLIGHT_BREATHING = no
 RGBLIGHT_ENABLE = no
-RGBLIGHT_CUSTOM_DRIVER = no
 
 OPT_DEFS = -DDEBUG_LEVEL=0
diff --git a/keyboards/ymdk_np21/backlight.c b/keyboards/ymdk_np21/backlight.c
deleted file mode 100644
index fbd241fa9dee8314d1af5ae2fff3f7b42343ce21..0000000000000000000000000000000000000000
--- a/keyboards/ymdk_np21/backlight.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // D0
-#define CAPSLOCK_PORT   (1 << 1)  // D1
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-
-  // TODO call user defined function
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymdk_np21/backlight_custom.h b/keyboards/ymdk_np21/backlight_custom.h
deleted file mode 100644
index 7210be840e09c82a347b3e1b1ac59d0319577822..0000000000000000000000000000000000000000
--- a/keyboards/ymdk_np21/backlight_custom.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifndef BACKLIGHT_CUSTOM_H
-#define BACKLIGHT_CUSTOM_H
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
-#endif  // BACKLIGHT_CUSTOM_H
diff --git a/keyboards/ymdk_np21/breathing_custom.h b/keyboards/ymdk_np21/breathing_custom.h
deleted file mode 100644
index 71416b1b45da44b453fd344b3b913649aa1a18c5..0000000000000000000000000000000000000000
--- a/keyboards/ymdk_np21/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/ymdk_np21/config.h b/keyboards/ymdk_np21/config.h
index 60c5277761c62f95dc0305344cf60fdfb9bab621..91478d903575e9f942c2add85dab41dab41a62ad 100644
--- a/keyboards/ymdk_np21/config.h
+++ b/keyboards/ymdk_np21/config.h
@@ -15,10 +15,9 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "config_common.h"
+#pragma once
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#include "config_common.h"
 
 #define VENDOR_ID       0x20A0
 #define PRODUCT_ID      0x422D
@@ -37,8 +36,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
-// #define BACKLIGHT_BREATHING  // works, but BL_TOGG might not work
+#define BACKLIGHT_BREATHING
 
 #define TAPPING_TOGGLE 3
 
@@ -52,5 +52,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLED_NUM 5
 #define RGB_DI_PIN E2 // NOTE: for PS2AVRGB boards, underglow commands are sent via I2C to 0xB0.
 #define RGBLIGHT_ANIMATIONS
-
-#endif
diff --git a/keyboards/ymdk_np21/rules.mk b/keyboards/ymdk_np21/rules.mk
index 772bee92855d611c3476bd00e1858a13d1080f65..237386bcea96b295404a1f3527167d1c93a40c02 100644
--- a/keyboards/ymdk_np21/rules.mk
+++ b/keyboards/ymdk_np21/rules.mk
@@ -19,7 +19,6 @@ CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 
 BACKLIGHT_ENABLE = yes
-BACKLIGHT_CUSTOM_DRIVER = yes
 
 RGBLIGHT_ENABLE = yes
 WS2812_DRIVER = i2c
@@ -30,5 +29,3 @@ KEY_LOCK_ENABLE = yes
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-
-SRC = backlight.c
diff --git a/keyboards/ymdk_np21/ymdk_np21.c b/keyboards/ymdk_np21/ymdk_np21.c
index f2b3d46dabd6460a46bb4ae2177b44bb610d547d..5bf15975814c5144acccbe17031ef809074aee92 100644
--- a/keyboards/ymdk_np21/ymdk_np21.c
+++ b/keyboards/ymdk_np21/ymdk_np21.c
@@ -18,20 +18,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "ymdk_np21.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-  b_led_init_ports();
+void keyboard_pre_init_kb(void) {
+    led_init_ports();
+    keyboard_pre_init_user();
 }
 
-void backlight_task(void) {
-  b_led_task();
+void led_init_ports(void) {
+    setPinOutput(D0);
+    writePinHigh(D0);
 }
 
-void backlight_set(uint8_t level) {
-  b_led_set(level);
+bool led_update_kb(led_t led_state) {
+    if (led_update_user(led_state)) {
+        writePin(D0, !led_state.num_lock);
+    }
+    return true;
 }
-#endif