refactor(battery): Auto enable battery drivers

CONFIG_ZMK_BATTERY_NRF_VDDH and CONFIG_ZMK_BATTERY_VOLTAGE_DIVIDER are
now automatically enabled if a DT node with the matching "compatible"
property is present and enabled, so they no longer need to be manually
set for each board.

app/boards/arm/bluemicro840/Kconfig.defconfig

@@ -24,7 +24,4 @@ config ZMK_BLE
 config ZMK_USB
 	default y
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 endif # BOARD_BLUEMICRO840_V1

app/boards/arm/bt60/Kconfig.defconfig

@@ -25,9 +25,6 @@ config ZMK_BLE
 config ZMK_USB
 	default y
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 config ZMK_KEYBOARD_NAME
 	default "BT60"
 

app/boards/arm/mikoto/Kconfig.defconfig

@@ -34,7 +34,4 @@ choice BOARD_MIKOTO_CHARGER_CURRENT
     default BOARD_MIKOTO_CHARGER_CURRENT_100MA
 endchoice
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 endif # BOARD_MIKOTO_520

app/boards/arm/nice60/Kconfig.defconfig

@@ -22,7 +22,4 @@ config ZMK_BLE
 config ZMK_USB
 	default y
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 endif # BOARD_NICE60

app/boards/arm/nice_nano/Kconfig.defconfig

@@ -23,17 +23,3 @@ config ZMK_USB
 	default y
 
 endif # BOARD_NICE_NANO || BOARD_NICE_NANO_V2
-
-if BOARD_NICE_NANO
-
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
-endif # BOARD_NICE_NANO
-
-if BOARD_NICE_NANO_V2
-
-config ZMK_BATTERY_NRF_VDDH
-	default y
-
-endif # BOARD_NICE_NANO_V2

app/boards/arm/nrfmicro/Kconfig.defconfig

@@ -32,9 +32,6 @@ if BOARD_NRFMICRO_13
 config BOARD_NRFMICRO_CHARGER
 	default y
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 endif # BOARD_NRFMICRO_13
 
 endif # BOARD_NRFMICRO_11 || BOARD_NRFMICRO_11_FLIPPED || BOARD_NRFMICRO_13

app/boards/arm/s40nc/Kconfig.defconfig

@@ -25,7 +25,4 @@ config ZMK_BLE
 config ZMK_USB
 	default y
 
-config ZMK_BATTERY_VOLTAGE_DIVIDER
-	default y
-
 endif # BOARD_S40NC

app/boards/seeeduino_xiao_ble.conf

@@ -3,7 +3,6 @@ CONFIG_CONSOLE=n
 CONFIG_SERIAL=n
 CONFIG_UART_CONSOLE=n
 CONFIG_UART_INTERRUPT_DRIVEN=n
-CONFIG_ZMK_BATTERY_VOLTAGE_DIVIDER=y
 CONFIG_ZMK_USB=y
 CONFIG_ZMK_BLE=y
 

app/drivers/sensor/battery/Kconfig

@@ -1,20 +1,25 @@
 # Copyright (c) 2020-2021 The ZMK Contributors
 # SPDX-License-Identifier: MIT
 
+DT_COMPAT_ZMK_BATTERY_NRF_VDDH := zmk,battery-nrf-vddh
+DT_COMPAT_ZMK_BATTERY_VOLTAGE_DIVIDER := zmk,battery-voltage-divider
+
 config ZMK_BATTERY
 	bool "ZMK battery monitoring"
 	help
 		Enable battery monitoring
 
 config ZMK_BATTERY_NRF_VDDH
-	bool "ZMK nRF VDDH battery monitoring"
+	bool
+	default $(dt_compat_enabled,$(DT_COMPAT_ZMK_BATTERY_NRF_VDDH))
 	select ADC
 	select ZMK_BATTERY
 	help
 		Enable ZMK nRF VDDH voltage driver for battery monitoring.
 
 config ZMK_BATTERY_VOLTAGE_DIVIDER
-	bool "ZMK battery voltage divider"
+	bool
+	default $(dt_compat_enabled,$(DT_COMPAT_ZMK_BATTERY_VOLTAGE_DIVIDER))
 	select ADC
 	select ZMK_BATTERY
 	help