From 1969ec39ff17327fd220a92987412a4cb6cd3beb Mon Sep 17 00:00:00 2001
From: Liam Perlaki <lperlaki@icloud.com>
Date: Sun, 26 Jul 2020 08:59:10 +0200
Subject: [PATCH] Add patches for ADC peripherals

Add a patch to fixup a few registers in the ADC peripheral
for ATmega328P, ATmega32U4, ATmega1280, and ATmega64.
---
 patch/atmega1280.yaml |  1 +
 patch/atmega328p.yaml |  1 +
 patch/atmega32u4.yaml |  1 +
 patch/atmega64.yaml   |  1 +
 patch/common/adc.yaml | 23 +++++++++++++++++++++++
 5 files changed, 27 insertions(+)
 create mode 100644 patch/common/adc.yaml

diff --git a/patch/atmega1280.yaml b/patch/atmega1280.yaml
index 88940c10ee54c73a0aadb8154d1c904b754ee5a1..6a5afd86f0e9f5c927893f4f3dfee8b8c549f3e6 100644
--- a/patch/atmega1280.yaml
+++ b/patch/atmega1280.yaml
@@ -1,5 +1,6 @@
 _include:
   - "common/ac.yaml"
+  - "common/adc.yaml"
   - "common/spi.yaml"
   - "common/twi.yaml"
   - "common/usart.yaml"
diff --git a/patch/atmega328p.yaml b/patch/atmega328p.yaml
index fb4091a2a69ac971cb8db0265c62de7e14d9dcc0..b237aa3009dfb3b328b7f8886e444b72966ca501 100644
--- a/patch/atmega328p.yaml
+++ b/patch/atmega328p.yaml
@@ -1,5 +1,6 @@
 _include:
   - "common/ac.yaml"
+  - "common/adc.yaml"
   - "common/spi.yaml"
   - "common/timer/tc0.yaml"
   - "common/twi.yaml"
diff --git a/patch/atmega32u4.yaml b/patch/atmega32u4.yaml
index 03caac39942370cc24fcd18fc8cb7c09ceddc810..d08c2a10d695a50b9ac695f47a3aee2d38d1e56a 100644
--- a/patch/atmega32u4.yaml
+++ b/patch/atmega32u4.yaml
@@ -1,5 +1,6 @@
 _include:
   - "common/ac.yaml"
+  - "common/adc.yaml"
   - "common/pll.yaml"
   - "common/spi.yaml"
   - "common/timer/tc0.yaml"
diff --git a/patch/atmega64.yaml b/patch/atmega64.yaml
index 97a1d9481d5505a443de71568e633acc21953203..0dd96596d6d27b06183def4a075363893ab10280 100644
--- a/patch/atmega64.yaml
+++ b/patch/atmega64.yaml
@@ -1,4 +1,5 @@
 _include:
   - "common/ac.yaml"
+  - "common/adc.yaml"
   - "common/spi.yaml"
   - "common/usart.yaml"
diff --git a/patch/common/adc.yaml b/patch/common/adc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..e362f943d15ea7aa90d1440cc99d1b99a62a2c6b
--- /dev/null
+++ b/patch/common/adc.yaml
@@ -0,0 +1,23 @@
+# Patches for the Analog Digital Converter
+#
+# - Make the control-register actually writable
+ADC:
+  _modify:
+    ADCSRA:
+      access: read-write
+  ADCSRA:
+    ADPS:
+      _replace_enum:
+        PRESCALER_2: [1, "Prescaler Value 2"]
+        PRESCALER_4: [2, "Prescaler Value 4"]
+        PRESCALER_8: [3, "Prescaler Value 8"]
+        PRESCALER_16: [4, "Prescaler Value 16"]
+        PRESCALER_32: [5, "Prescaler Value 32"]
+        PRESCALER_64: [6, "Prescaler Value 64"]
+        PRESCALER_128: [7, "Prescaler Value 128"]
+  ADMUX:
+    REFS:
+      _replace_enum:
+        AREF: [0, "Aref Internal Vref turned off"]
+        AVCC: [1, "AVcc with external capacitor at AREF pin"]
+        INTERNAL: [3, "Internal 1.1V Voltage Reference with external capacitor at AREF pin"]
\ No newline at end of file