diff --git a/common_features.mk b/common_features.mk
index d09d4f1eff6..09217c4698c 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -588,7 +588,7 @@ ifneq ($(filter SOLENOID, $(HAPTIC_ENABLE)), )
 endif
 
 ifeq ($(strip $(HD44780_ENABLE)), yes)
-    SRC += drivers/avr/hd44780.c
+    SRC += platforms/avr/drivers/hd44780.c
     OPT_DEFS += -DHD44780_ENABLE
 endif
 
diff --git a/doxygen-todo b/doxygen-todo
index d8892e48ded..643a0df1dab 100644
--- a/doxygen-todo
+++ b/doxygen-todo
@@ -21,7 +21,6 @@ quantum/tools
 quantum/visualizer
 quantum/visualizer/resources
 drivers
-drivers/avr
 drivers/ugfx
 drivers/ugfx/gdisp
 drivers/ugfx/gdisp/is31fl3731c
diff --git a/keyboards/hs60/v2/ansi/rules.mk b/keyboards/hs60/v2/ansi/rules.mk
index bae81dce85b..4ec0d8ef334 100644
--- a/keyboards/hs60/v2/ansi/rules.mk
+++ b/keyboards/hs60/v2/ansi/rules.mk
@@ -33,4 +33,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		drivers/led/issi/is31fl3733.c \
 		quantum/color.c \
-		drivers/chibios/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/hs60/v2/hhkb/rules.mk b/keyboards/hs60/v2/hhkb/rules.mk
index 922c8a6c044..da021bdfaa0 100644
--- a/keyboards/hs60/v2/hhkb/rules.mk
+++ b/keyboards/hs60/v2/hhkb/rules.mk
@@ -31,4 +31,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		drivers/led/issi/is31fl3733.c \
 		quantum/color.c \
-		drivers/chibios/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/hs60/v2/iso/rules.mk b/keyboards/hs60/v2/iso/rules.mk
index 16b14d0d5e7..50c50b3aa3b 100644
--- a/keyboards/hs60/v2/iso/rules.mk
+++ b/keyboards/hs60/v2/iso/rules.mk
@@ -33,4 +33,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		drivers/led/issi/is31fl3733.c \
 		quantum/color.c \
-		drivers/chibios/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/keebwerk/mega/ansi/rules.mk b/keyboards/keebwerk/mega/ansi/rules.mk
index 3e280e71606..92e0e919f03 100755
--- a/keyboards/keebwerk/mega/ansi/rules.mk
+++ b/keyboards/keebwerk/mega/ansi/rules.mk
@@ -36,4 +36,4 @@ SRC +=  keyboards/wilba_tech/wt_main.c \
         keyboards/wilba_tech/wt_rgb_backlight.c \
         drivers/led/issi/is31fl3733.c \
         quantum/color.c
-QUANTUM_LIB_SRC += drivers/chibios/i2c_master.c
+QUANTUM_LIB_SRC += i2c_master.c
diff --git a/keyboards/mxss/mxss.c b/keyboards/mxss/mxss.c
index 48ea4664194..dd418b86fd6 100644
--- a/keyboards/mxss/mxss.c
+++ b/keyboards/mxss/mxss.c
@@ -18,7 +18,7 @@
 
 #include QMK_KEYBOARD_H
 #include "tmk_core/common/eeprom.h"
-#include "tmk_core/common/action_layer.h"
+#include "action_layer.h"
 #include "rgblight.h"
 #include "via.h"
 #include "version.h" // for QMK_BUILDDATE used in EEPROM magic
diff --git a/keyboards/nebula12/rules.mk b/keyboards/nebula12/rules.mk
index 2996b840cd6..75dd7145d88 100755
--- a/keyboards/nebula12/rules.mk
+++ b/keyboards/nebula12/rules.mk
@@ -33,4 +33,4 @@ SRC +=  keyboards/wilba_tech/wt_main.c \
         keyboards/wilba_tech/wt_rgb_backlight.c \
         drivers/led/issi/is31fl3731.c \
         quantum/color.c
-QUANTUM_LIB_SRC += drivers/chibios/i2c_master.c
+QUANTUM_LIB_SRC += i2c_master.c
diff --git a/keyboards/nebula68/rules.mk b/keyboards/nebula68/rules.mk
index ba5ba5199c6..43ae287ec3c 100755
--- a/keyboards/nebula68/rules.mk
+++ b/keyboards/nebula68/rules.mk
@@ -35,4 +35,4 @@ SRC +=  keyboards/wilba_tech/wt_main.c \
         keyboards/wilba_tech/wt_rgb_backlight.c \
         drivers/led/issi/is31fl3733.c \
         quantum/color.c
-QUANTUM_LIB_SRC += drivers/chibios/i2c_master.c
+QUANTUM_LIB_SRC += i2c_master.c
diff --git a/keyboards/nk65/rules.mk b/keyboards/nk65/rules.mk
index fcbb8090c7a..07332019f3d 100755
--- a/keyboards/nk65/rules.mk
+++ b/keyboards/nk65/rules.mk
@@ -33,4 +33,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		drivers/led/issi/is31fl3733.c \
 		quantum/color.c \
-		drivers/chibios/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/nk87/rules.mk b/keyboards/nk87/rules.mk
index fde3025ca62..5be7839d778 100755
--- a/keyboards/nk87/rules.mk
+++ b/keyboards/nk87/rules.mk
@@ -34,4 +34,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		drivers/led/issi/is31fl3733.c \
 		quantum/color.c \
-		drivers/chibios/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_kara/rules.mk b/keyboards/wilba_tech/rama_works_kara/rules.mk
index 73def19bece..95d6c1dcb5f 100644
--- a/keyboards/wilba_tech/rama_works_kara/rules.mk
+++ b/keyboards/wilba_tech/rama_works_kara/rules.mk
@@ -35,4 +35,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_koyu/rules.mk b/keyboards/wilba_tech/rama_works_koyu/rules.mk
index 235e853d54d..2893a8727bb 100644
--- a/keyboards/wilba_tech/rama_works_koyu/rules.mk
+++ b/keyboards/wilba_tech/rama_works_koyu/rules.mk
@@ -42,4 +42,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m10_c/rules.mk b/keyboards/wilba_tech/rama_works_m10_c/rules.mk
index 1c20f4df6f4..89ebfaedcd9 100644
--- a/keyboards/wilba_tech/rama_works_m10_c/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m10_c/rules.mk
@@ -32,4 +32,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m50_a/rules.mk b/keyboards/wilba_tech/rama_works_m50_a/rules.mk
index 1c20f4df6f4..89ebfaedcd9 100644
--- a/keyboards/wilba_tech/rama_works_m50_a/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m50_a/rules.mk
@@ -32,4 +32,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m60_a/rules.mk b/keyboards/wilba_tech/rama_works_m60_a/rules.mk
index 5c1efef89c3..17df5e5f6e7 100644
--- a/keyboards/wilba_tech/rama_works_m60_a/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m60_a/rules.mk
@@ -44,4 +44,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m65_b/rules.mk b/keyboards/wilba_tech/rama_works_m65_b/rules.mk
index 1c20f4df6f4..89ebfaedcd9 100644
--- a/keyboards/wilba_tech/rama_works_m65_b/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m65_b/rules.mk
@@ -32,4 +32,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m65_bx/rules.mk b/keyboards/wilba_tech/rama_works_m65_bx/rules.mk
index 1c20f4df6f4..89ebfaedcd9 100644
--- a/keyboards/wilba_tech/rama_works_m65_bx/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m65_bx/rules.mk
@@ -32,4 +32,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_m6_b/rules.mk b/keyboards/wilba_tech/rama_works_m6_b/rules.mk
index 5a7a15c2b16..76170d3d8ed 100644
--- a/keyboards/wilba_tech/rama_works_m6_b/rules.mk
+++ b/keyboards/wilba_tech/rama_works_m6_b/rules.mk
@@ -41,4 +41,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3218.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/rama_works_u80_a/rules.mk b/keyboards/wilba_tech/rama_works_u80_a/rules.mk
index b6c0a1e2a36..b441d173791 100644
--- a/keyboards/wilba_tech/rama_works_u80_a/rules.mk
+++ b/keyboards/wilba_tech/rama_works_u80_a/rules.mk
@@ -34,4 +34,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/wt60_a/rules.mk b/keyboards/wilba_tech/wt60_a/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt60_a/rules.mk
+++ b/keyboards/wilba_tech/wt60_a/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt60_b/rules.mk b/keyboards/wilba_tech/wt60_b/rules.mk
index 91ddcf536aa..bf4c3c8afa3 100644
--- a/keyboards/wilba_tech/wt60_b/rules.mk
+++ b/keyboards/wilba_tech/wt60_b/rules.mk
@@ -42,4 +42,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/wt60_bx/rules.mk b/keyboards/wilba_tech/wt60_bx/rules.mk
index 91ddcf536aa..bf4c3c8afa3 100644
--- a/keyboards/wilba_tech/wt60_bx/rules.mk
+++ b/keyboards/wilba_tech/wt60_bx/rules.mk
@@ -42,4 +42,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/wt60_c/rules.mk b/keyboards/wilba_tech/wt60_c/rules.mk
index 91ddcf536aa..bf4c3c8afa3 100644
--- a/keyboards/wilba_tech/wt60_c/rules.mk
+++ b/keyboards/wilba_tech/wt60_c/rules.mk
@@ -42,4 +42,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/wt65_a/rules.mk b/keyboards/wilba_tech/wt65_a/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt65_a/rules.mk
+++ b/keyboards/wilba_tech/wt65_a/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt65_b/rules.mk b/keyboards/wilba_tech/wt65_b/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt65_b/rules.mk
+++ b/keyboards/wilba_tech/wt65_b/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt75_a/rules.mk b/keyboards/wilba_tech/wt75_a/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt75_a/rules.mk
+++ b/keyboards/wilba_tech/wt75_a/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt75_b/rules.mk b/keyboards/wilba_tech/wt75_b/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt75_b/rules.mk
+++ b/keyboards/wilba_tech/wt75_b/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt75_c/rules.mk b/keyboards/wilba_tech/wt75_c/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt75_c/rules.mk
+++ b/keyboards/wilba_tech/wt75_c/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt80_a/rules.mk b/keyboards/wilba_tech/wt80_a/rules.mk
index a7b51dd1f3f..f6c8e99a647 100644
--- a/keyboards/wilba_tech/wt80_a/rules.mk
+++ b/keyboards/wilba_tech/wt80_a/rules.mk
@@ -30,7 +30,7 @@ AUDIO_ENABLE = no           # Audio output on port C6
 
 # project specific files
 SRC =	drivers/led/issi/is31fl3736.c \
-		drivers/avr/i2c_master.c \
+		i2c_master.c \
 		quantum/color.c \
 		keyboards/wilba_tech/wt_mono_backlight.c \
 		keyboards/wilba_tech/wt_main.c
diff --git a/keyboards/wilba_tech/wt_mono_backlight.c b/keyboards/wilba_tech/wt_mono_backlight.c
index 310e9afd1b5..77cee34ca65 100644
--- a/keyboards/wilba_tech/wt_mono_backlight.c
+++ b/keyboards/wilba_tech/wt_mono_backlight.c
@@ -20,7 +20,7 @@
 #include "wt_rgb_backlight_keycodes.h" // reuse these for now
 
 #include <avr/interrupt.h>
-#include "drivers/avr/i2c_master.h"
+#include "i2c_master.h"
 
 #include "progmem.h"
 #include "quantum/color.h"
diff --git a/keyboards/wilba_tech/wt_rgb_backlight.c b/keyboards/wilba_tech/wt_rgb_backlight.c
index 77613a3338f..82b1fb2fb36 100644
--- a/keyboards/wilba_tech/wt_rgb_backlight.c
+++ b/keyboards/wilba_tech/wt_rgb_backlight.c
@@ -54,11 +54,11 @@
 
 #if !defined(RGB_BACKLIGHT_HS60) && !defined(RGB_BACKLIGHT_NK65) && !defined(RGB_BACKLIGHT_NK87) && !defined(RGB_BACKLIGHT_NEBULA68) && !defined(RGB_BACKLIGHT_NEBULA12) && !defined (RGB_BACKLIGHT_KW_MEGA)
 #include <avr/interrupt.h>
-#include "drivers/avr/i2c_master.h"
+#include "i2c_master.h"
 #else
 #include <ch.h>
 #include <hal.h>
-#include "drivers/chibios/i2c_master.h"
+#include "i2c_master.h"
 #endif
 
 #if defined(RGB_BACKLIGHT_DAWN60)
diff --git a/keyboards/wilba_tech/zeal60/rules.mk b/keyboards/wilba_tech/zeal60/rules.mk
index c290c6e7eb1..6d7d15d0578 100644
--- a/keyboards/wilba_tech/zeal60/rules.mk
+++ b/keyboards/wilba_tech/zeal60/rules.mk
@@ -44,4 +44,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c
diff --git a/keyboards/wilba_tech/zeal65/rules.mk b/keyboards/wilba_tech/zeal65/rules.mk
index e8680c90175..6853adc036b 100644
--- a/keyboards/wilba_tech/zeal65/rules.mk
+++ b/keyboards/wilba_tech/zeal65/rules.mk
@@ -42,4 +42,4 @@ SRC =	keyboards/wilba_tech/wt_main.c \
 		keyboards/wilba_tech/wt_rgb_backlight.c \
 		quantum/color.c \
 		drivers/led/issi/is31fl3731.c \
-		drivers/avr/i2c_master.c
+		i2c_master.c