Move `SOFT_SERIAL_PIN` to data driven (#19863)

68 files changed, 103 insertions, 100 deletions

diff --git a/keyboards/bastardkb/charybdis/3x5/v1/elitec/config.h b/keyboards/bastardkb/charybdis/3x5/v1/elitec/config.h
index 8a9d40ac63..909cd05978 100644
--- a/keyboards/bastardkb/charybdis/3x5/v1/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v1/elitec/config.h
@@ -32,9 +32,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/3x5/v1/elitec/info.json b/keyboards/bastardkb/charybdis/3x5/v1/elitec/info.json
index 9e25f2efe7..11cc51ad46 100644
--- a/keyboards/bastardkb/charybdis/3x5/v1/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/elitec/config.h b/keyboards/bastardkb/charybdis/3x5/v2/elitec/config.h
index 2667ee9e7e..510a55be41 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v2/elitec/config.h
@@ -26,9 +26,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/elitec/info.json b/keyboards/bastardkb/charybdis/3x5/v2/elitec/info.json
index 536d622c0d..5c56d68554 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/config.h b/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/config.h
index cbdc3ae855..304e89ce21 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/info.json b/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/info.json
index b89c90736d..4b914a775f 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/config.h b/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/config.h
index 3772044c15..d497261418 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/info.json b/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/info.json
index b89c90736d..4b914a775f 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
index a06859b215..0138b9656f 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
index b2a9b06147..9e1c778cc3 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v1/elitec/config.h b/keyboards/bastardkb/charybdis/3x6/v1/elitec/config.h
index fa1a1c01f7..0fea2772d2 100644
--- a/keyboards/bastardkb/charybdis/3x6/v1/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v1/elitec/config.h
@@ -31,9 +31,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/3x6/v1/elitec/info.json b/keyboards/bastardkb/charybdis/3x6/v1/elitec/info.json
index 6a03ec9a3a..5a8b815e95 100644
--- a/keyboards/bastardkb/charybdis/3x6/v1/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/elitec/config.h b/keyboards/bastardkb/charybdis/3x6/v2/elitec/config.h
index e9d45e6796..ba2bd4ac36 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v2/elitec/config.h
@@ -26,9 +26,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/elitec/info.json b/keyboards/bastardkb/charybdis/3x6/v2/elitec/info.json
index 7186cb2c04..d84a7f314c 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/config.h b/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/config.h
index 3f72897c56..053d780161 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/info.json b/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/info.json
index 17dc0c1222..4e1c96298d 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/config.h b/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/config.h
index 1828aaa98b..e4afc5a866 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/info.json b/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/info.json
index 17dc0c1222..4e1c96298d 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
index 81c7e737a7..658819f936 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
index b041972cfe..b667f6d76a 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v1/elitec/config.h b/keyboards/bastardkb/charybdis/4x6/v1/elitec/config.h
index 710c4c3587..44e81807ee 100644
--- a/keyboards/bastardkb/charybdis/4x6/v1/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v1/elitec/config.h
@@ -32,9 +32,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/4x6/v1/elitec/info.json b/keyboards/bastardkb/charybdis/4x6/v1/elitec/info.json
index c63ceac72c..c9921cd341 100644
--- a/keyboards/bastardkb/charybdis/4x6/v1/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/elitec/config.h b/keyboards/bastardkb/charybdis/4x6/v2/elitec/config.h
index 692a28b7be..8e586b89b2 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/elitec/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v2/elitec/config.h
@@ -26,9 +26,6 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/elitec/info.json b/keyboards/bastardkb/charybdis/4x6/v2/elitec/info.json
index 6d0300de2e..9349712a41 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/elitec/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/config.h b/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/config.h
index 53d88652e1..3e7e3529c8 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/info.json b/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/info.json
index a9a58400e9..6931f9e876 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/config.h b/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/config.h
index 8fd108a506..827267d2cf 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/info.json b/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/info.json
index a9a58400e9..6931f9e876 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
index b1b432c330..fc4e3efadf 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
index e869d19466..0b7ea21560 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }
diff --git a/keyboards/bastardkb/dilemma/3x5_2/assembled/config.h b/keyboards/bastardkb/dilemma/3x5_2/assembled/config.h
index 8420898f4e..3a5898c546 100644
--- a/keyboards/bastardkb/dilemma/3x5_2/assembled/config.h
+++ b/keyboards/bastardkb/dilemma/3x5_2/assembled/config.h
@@ -27,9 +27,6 @@
 #define SPLIT_HAND_PIN GP29
 #define SPLIT_HAND_PIN_LOW_IS_LEFT // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* CRC. */
 #define CRC8_USE_TABLE
 #define CRC8_OPTIMIZE_SPEED
diff --git a/keyboards/bastardkb/dilemma/3x5_2/assembled/info.json b/keyboards/bastardkb/dilemma/3x5_2/assembled/info.json
index eec856a51f..e4f48e6c7e 100644
--- a/keyboards/bastardkb/dilemma/3x5_2/assembled/info.json
+++ b/keyboards/bastardkb/dilemma/3x5_2/assembled/info.json
@@ -1,5 +1,8 @@
 {
     "keyboard_name": "Dilemma (3x5+2) Assembled",
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/dilemma/3x5_2/splinky/config.h b/keyboards/bastardkb/dilemma/3x5_2/splinky/config.h
index 4ac28ed1f9..67e9646845 100644
--- a/keyboards/bastardkb/dilemma/3x5_2/splinky/config.h
+++ b/keyboards/bastardkb/dilemma/3x5_2/splinky/config.h
@@ -33,9 +33,6 @@
 // left one, uncomment the following line.
 //#define SPLIT_HAND_PIN_LOW_IS_LEFT // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* CRC. */
 #define CRC8_USE_TABLE
 #define CRC8_OPTIMIZE_SPEED
diff --git a/keyboards/bastardkb/dilemma/3x5_2/splinky/info.json b/keyboards/bastardkb/dilemma/3x5_2/splinky/info.json
index 4944cc2090..aec0957ed6 100644
--- a/keyboards/bastardkb/dilemma/3x5_2/splinky/info.json
+++ b/keyboards/bastardkb/dilemma/3x5_2/splinky/info.json
@@ -1,5 +1,8 @@
 {
     "keyboard_name": "Dilemma (3x5+2) Splinky",
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/dilemma/3x5_3/config.h b/keyboards/bastardkb/dilemma/3x5_3/config.h
index 985d622fb6..a30b98a10a 100644
--- a/keyboards/bastardkb/dilemma/3x5_3/config.h
+++ b/keyboards/bastardkb/dilemma/3x5_3/config.h
@@ -27,9 +27,6 @@
 #define SPLIT_HAND_PIN GP29
 #define SPLIT_HAND_PIN_LOW_IS_LEFT // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0  // Per-key.
 // #define RGB_DI_PIN GP10 // Underglow.
diff --git a/keyboards/bastardkb/dilemma/3x5_3/info.json b/keyboards/bastardkb/dilemma/3x5_3/info.json
index 0b7332e236..a4fe592587 100644
--- a/keyboards/bastardkb/dilemma/3x5_3/info.json
+++ b/keyboards/bastardkb/dilemma/3x5_3/info.json
@@ -4,6 +4,9 @@
         "device_version": "2.0.0",
         "pid": "0x1835"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040",
     "community_layouts": ["split_3x5_3"],
diff --git a/keyboards/bastardkb/scylla/v1/elitec/config.h b/keyboards/bastardkb/scylla/v1/elitec/config.h
index 0990e6d068..967a8c6c53 100644
--- a/keyboards/bastardkb/scylla/v1/elitec/config.h
+++ b/keyboards/bastardkb/scylla/v1/elitec/config.h
@@ -27,8 +27,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D0
-
 /* RGB settings. */
 #define RGB_DI_PIN D2
diff --git a/keyboards/bastardkb/scylla/v1/elitec/info.json b/keyboards/bastardkb/scylla/v1/elitec/info.json
index fe099a811d..1ed2cee71d 100644
--- a/keyboards/bastardkb/scylla/v1/elitec/info.json
+++ b/keyboards/bastardkb/scylla/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D0"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/scylla/v2/elitec/config.h b/keyboards/bastardkb/scylla/v2/elitec/config.h
index 698f6e426f..e9691010ed 100644
--- a/keyboards/bastardkb/scylla/v2/elitec/config.h
+++ b/keyboards/bastardkb/scylla/v2/elitec/config.h
@@ -26,8 +26,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
diff --git a/keyboards/bastardkb/scylla/v2/elitec/info.json b/keyboards/bastardkb/scylla/v2/elitec/info.json
index 087fce8280..4674e238a6 100644
--- a/keyboards/bastardkb/scylla/v2/elitec/info.json
+++ b/keyboards/bastardkb/scylla/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/scylla/v2/splinky_2/config.h b/keyboards/bastardkb/scylla/v2/splinky_2/config.h
index 5f678fb331..f65dcfb0b3 100644
--- a/keyboards/bastardkb/scylla/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/scylla/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/scylla/v2/splinky_2/info.json b/keyboards/bastardkb/scylla/v2/splinky_2/info.json
index dcd638efa3..6d3edbd0ee 100644
--- a/keyboards/bastardkb/scylla/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/scylla/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/scylla/v2/splinky_3/config.h b/keyboards/bastardkb/scylla/v2/splinky_3/config.h
index 56020397da..09d5af43c8 100644
--- a/keyboards/bastardkb/scylla/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/scylla/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/scylla/v2/splinky_3/info.json b/keyboards/bastardkb/scylla/v2/splinky_3/info.json
index dcd638efa3..6d3edbd0ee 100644
--- a/keyboards/bastardkb/scylla/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/scylla/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/scylla/v2/stemcell/config.h b/keyboards/bastardkb/scylla/v2/stemcell/config.h
index 578e23f40a..5528531b91 100644
--- a/keyboards/bastardkb/scylla/v2/stemcell/config.h
+++ b/keyboards/bastardkb/scylla/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/scylla/v2/stemcell/info.json b/keyboards/bastardkb/scylla/v2/stemcell/info.json
index 42d6b6c520..eccfea99f4 100644
--- a/keyboards/bastardkb/scylla/v2/stemcell/info.json
+++ b/keyboards/bastardkb/scylla/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }
diff --git a/keyboards/bastardkb/skeletyl/v1/elitec/config.h b/keyboards/bastardkb/skeletyl/v1/elitec/config.h
index fd2101ec55..f98185755f 100644
--- a/keyboards/bastardkb/skeletyl/v1/elitec/config.h
+++ b/keyboards/bastardkb/skeletyl/v1/elitec/config.h
@@ -27,8 +27,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D0
-
 /* RGB settings. */
 #define RGB_DI_PIN D2
diff --git a/keyboards/bastardkb/skeletyl/v1/elitec/info.json b/keyboards/bastardkb/skeletyl/v1/elitec/info.json
index 91bb069a75..392e3168ff 100644
--- a/keyboards/bastardkb/skeletyl/v1/elitec/info.json
+++ b/keyboards/bastardkb/skeletyl/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D0"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/skeletyl/v2/elitec/config.h b/keyboards/bastardkb/skeletyl/v2/elitec/config.h
index 5d4e48d49d..6f001c5e24 100644
--- a/keyboards/bastardkb/skeletyl/v2/elitec/config.h
+++ b/keyboards/bastardkb/skeletyl/v2/elitec/config.h
@@ -26,8 +26,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
diff --git a/keyboards/bastardkb/skeletyl/v2/elitec/info.json b/keyboards/bastardkb/skeletyl/v2/elitec/info.json
index a0d6611bf3..ae98ff793a 100644
--- a/keyboards/bastardkb/skeletyl/v2/elitec/info.json
+++ b/keyboards/bastardkb/skeletyl/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/skeletyl/v2/splinky_2/config.h b/keyboards/bastardkb/skeletyl/v2/splinky_2/config.h
index 02a8bd6551..7fef28b05e 100644
--- a/keyboards/bastardkb/skeletyl/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/skeletyl/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/skeletyl/v2/splinky_2/info.json b/keyboards/bastardkb/skeletyl/v2/splinky_2/info.json
index 7b89748f81..a39c13a0ae 100644
--- a/keyboards/bastardkb/skeletyl/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/skeletyl/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/skeletyl/v2/splinky_3/config.h b/keyboards/bastardkb/skeletyl/v2/splinky_3/config.h
index e33ced273d..eda378df84 100644
--- a/keyboards/bastardkb/skeletyl/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/skeletyl/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/skeletyl/v2/splinky_3/info.json b/keyboards/bastardkb/skeletyl/v2/splinky_3/info.json
index 7b89748f81..a39c13a0ae 100644
--- a/keyboards/bastardkb/skeletyl/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/skeletyl/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/skeletyl/v2/stemcell/config.h b/keyboards/bastardkb/skeletyl/v2/stemcell/config.h
index 44acd40e7b..86bbdd199b 100644
--- a/keyboards/bastardkb/skeletyl/v2/stemcell/config.h
+++ b/keyboards/bastardkb/skeletyl/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/skeletyl/v2/stemcell/info.json b/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
index 2713d23e58..257eb6f62e 100644
--- a/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
+++ b/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }
diff --git a/keyboards/bastardkb/tbk/config.h b/keyboards/bastardkb/tbk/config.h
index cc0b06744e..7a273050c0 100644
--- a/keyboards/bastardkb/tbk/config.h
+++ b/keyboards/bastardkb/tbk/config.h
@@ -35,5 +35,5 @@
 #define RGBLIGHT_EFFECT_RGB_TEST
 #define RGBLIGHT_EFFECT_ALTERNATING
 #define RGBLIGHT_EFFECT_TWINKLE
-#define SOFT_SERIAL_PIN D0
+
 #define MASTER_RIGHT
diff --git a/keyboards/bastardkb/tbk/info.json b/keyboards/bastardkb/tbk/info.json
index 53fd952c8c..22f10cee96 100644
--- a/keyboards/bastardkb/tbk/info.json
+++ b/keyboards/bastardkb/tbk/info.json
@@ -5,6 +5,9 @@
         "device_version": "0.0.1",
         "pid": "0x1828"
     },
+    "split": {
+        "soft_serial_pin": "D0"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu",
     "layouts": {
diff --git a/keyboards/bastardkb/tbkmini/v1/elitec/config.h b/keyboards/bastardkb/tbkmini/v1/elitec/config.h
index 5a9ff87efa..c17e20b3d7 100644
--- a/keyboards/bastardkb/tbkmini/v1/elitec/config.h
+++ b/keyboards/bastardkb/tbkmini/v1/elitec/config.h
@@ -27,8 +27,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D0
-
 /* RGB settings. */
 #define RGB_DI_PIN D2
diff --git a/keyboards/bastardkb/tbkmini/v1/elitec/info.json b/keyboards/bastardkb/tbkmini/v1/elitec/info.json
index 51fc9a9a54..4fee403604 100644
--- a/keyboards/bastardkb/tbkmini/v1/elitec/info.json
+++ b/keyboards/bastardkb/tbkmini/v1/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "1.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D0"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/tbkmini/v2/elitec/config.h b/keyboards/bastardkb/tbkmini/v2/elitec/config.h
index 1feeac092b..01ce7edc7c 100644
--- a/keyboards/bastardkb/tbkmini/v2/elitec/config.h
+++ b/keyboards/bastardkb/tbkmini/v2/elitec/config.h
@@ -26,8 +26,5 @@
 /* Handedness. */
 #define MASTER_RIGHT
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
diff --git a/keyboards/bastardkb/tbkmini/v2/elitec/info.json b/keyboards/bastardkb/tbkmini/v2/elitec/info.json
index 83964b727f..d91729481f 100644
--- a/keyboards/bastardkb/tbkmini/v2/elitec/info.json
+++ b/keyboards/bastardkb/tbkmini/v2/elitec/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu"
 }
diff --git a/keyboards/bastardkb/tbkmini/v2/splinky_2/config.h b/keyboards/bastardkb/tbkmini/v2/splinky_2/config.h
index ed0b4a6a54..d5da5febdf 100644
--- a/keyboards/bastardkb/tbkmini/v2/splinky_2/config.h
+++ b/keyboards/bastardkb/tbkmini/v2/splinky_2/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP13
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/tbkmini/v2/splinky_2/info.json b/keyboards/bastardkb/tbkmini/v2/splinky_2/info.json
index 63b44040ae..870f9db26e 100644
--- a/keyboards/bastardkb/tbkmini/v2/splinky_2/info.json
+++ b/keyboards/bastardkb/tbkmini/v2/splinky_2/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/tbkmini/v2/splinky_3/config.h b/keyboards/bastardkb/tbkmini/v2/splinky_3/config.h
index 849fcec968..8d60f74a6f 100644
--- a/keyboards/bastardkb/tbkmini/v2/splinky_3/config.h
+++ b/keyboards/bastardkb/tbkmini/v2/splinky_3/config.h
@@ -31,9 +31,6 @@
 // #define SPLIT_HAND_PIN GP15
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN GP1
-
 /* RGB settings. */
 #define RGB_DI_PIN GP0
 
diff --git a/keyboards/bastardkb/tbkmini/v2/splinky_3/info.json b/keyboards/bastardkb/tbkmini/v2/splinky_3/info.json
index 63b44040ae..870f9db26e 100644
--- a/keyboards/bastardkb/tbkmini/v2/splinky_3/info.json
+++ b/keyboards/bastardkb/tbkmini/v2/splinky_3/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "GP1"
+    },
     "processor": "RP2040",
     "bootloader": "rp2040"
 }
diff --git a/keyboards/bastardkb/tbkmini/v2/stemcell/config.h b/keyboards/bastardkb/tbkmini/v2/stemcell/config.h
index 0c66a8075b..e40513cae8 100644
--- a/keyboards/bastardkb/tbkmini/v2/stemcell/config.h
+++ b/keyboards/bastardkb/tbkmini/v2/stemcell/config.h
@@ -32,9 +32,6 @@
 // #define SPLIT_HAND_PIN A0
 // #define SPLIT_HAND_PIN_LOW_IS_LEFT  // High -> right, Low -> left.
 
-/* serial.c configuration (for split keyboard). */
-#define SOFT_SERIAL_PIN D2
-
 /* RGB settings. */
 #define RGB_DI_PIN D3
 #define WS2812_PWM_DRIVER PWMD2
diff --git a/keyboards/bastardkb/tbkmini/v2/stemcell/info.json b/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
index a07d65bdd3..f8901144af 100644
--- a/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
+++ b/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
@@ -3,6 +3,9 @@
     "usb": {
         "device_version": "2.0.0"
     },
+    "split": {
+        "soft_serial_pin": "D2"
+    },
     "processor": "STM32F411",
     "bootloader": "stm32-dfu"
 }