ARM: dts: ux500: Add Flash LEDs to Samsung phones

This adds the Richtek RT8515 Flash LED to the Golden,
Skomer and Janice device trees.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210201091308.284465-1-linus.walleij@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/ste-ux500-samsung-golden.dts

@@ -5,6 +5,7 @@
 #include "ste-ab8505.dtsi"
 #include "ste-dbx5x0-pinctrl.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
@@ -373,6 +374,32 @@ home {
 		};
 	};
 
+	/* Richtek RT8515GQW Flash LED Driver IC */
+	flash {
+		compatible = "richtek,rt8515";
+		/* GPIO 140 */
+		enf-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
+		/* GPIO 141 */
+		ent-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>;
+		/*
+		 * RFS is 16 kOhm and RTS is 100 kOhm giving
+		 * the flash max current 343mA and torch max
+		 * current 55 mA.
+		 */
+		richtek,rfs-ohms = <16000>;
+		richtek,rts-ohms = <100000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio_flash_default_mode>;
+
+		led {
+			function = LED_FUNCTION_FLASH;
+			color = <LED_COLOR_ID_WHITE>;
+			flash-max-timeout-us = <250000>;
+			flash-max-microamp = <343750>;
+			led-max-microamp = <55000>;
+		};
+	};
+
 	vibrator {
 		compatible = "gpio-vibrator";
 		/* GPIO195 (MOT_EN) */
@@ -498,6 +525,15 @@ golden_cfg1 {
 		};
 	};
 
+	flash {
+		gpio_flash_default_mode: flash_default {
+			golden_cfg1 {
+				pins = "GPIO140_B11", "GPIO141_C12";
+				ste,config = <&gpio_out_lo>;
+			};
+		};
+	};
+
 	i2c-gpio-1 {
 		i2c_gpio_1_default: i2c_gpio_1 {
 			golden_cfg1 {

arch/arm/boot/dts/ste-ux500-samsung-janice.dts

@@ -8,6 +8,7 @@
 #include "ste-ab8500.dtsi"
 #include "ste-dbx5x0-pinctrl.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
@@ -180,6 +181,32 @@ button-voldown {
 		};
 	};
 
+	/* Richtek RT8515GQW Flash LED Driver IC */
+	flash {
+		compatible = "richtek,rt8515";
+		/* GPIO 140 */
+		enf-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
+		/* GPIO 141 */
+		ent-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>;
+		/*
+		 * RFS is 16 kOhm and RTS is 100 kOhm giving
+		 * the flash max current 343mA and torch max
+		 * current 55 mA.
+		 */
+		richtek,rfs-ohms = <16000>;
+		richtek,rts-ohms = <100000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio_flash_default_mode>;
+
+		led {
+			function = LED_FUNCTION_FLASH;
+			color = <LED_COLOR_ID_WHITE>;
+			flash-max-timeout-us = <250000>;
+			flash-max-microamp = <343750>;
+			led-max-microamp = <55000>;
+		};
+	};
+
 	/* Bit-banged I2C on GPIO143 and GPIO144 also called "SUBPMU I2C" */
 	i2c-gpio-0 {
 		compatible = "i2c-gpio";
@@ -739,6 +766,15 @@ janice_cfg1 {
 			};
 		};
 	};
+	/* Flash and torch */
+	flash {
+		gpio_flash_default_mode: flash_default {
+			janice_cfg1 {
+				pins = "GPIO140_B11", "GPIO141_C12";
+				ste,config = <&gpio_out_lo>;
+			};
+		};
+	};
 	/* GPIO keys */
 	gpio-keys {
 		gpio_keys_default_mode: gpio_keys_default {

arch/arm/boot/dts/ste-ux500-samsung-skomer.dts

@@ -8,6 +8,7 @@
 #include "ste-ab8505.dtsi"
 #include "ste-dbx5x0-pinctrl.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
@@ -118,6 +119,32 @@ ktd253: backlight {
 		pinctrl-0 = <&gpio_backlight_default_mode>;
 	};
 
+	/* Richtek RT8515GQW Flash LED Driver IC */
+	flash {
+		compatible = "richtek,rt8515";
+		/* GPIO 140 */
+		enf-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
+		/* GPIO 141 */
+		ent-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>;
+		/*
+		 * RFS is 16 kOhm and RTS is 100 kOhm giving
+		 * the flash max current 343mA and torch max
+		 * current 55 mA.
+		 */
+		richtek,rfs-ohms = <16000>;
+		richtek,rts-ohms = <100000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio_flash_default_mode>;
+
+		led {
+			function = LED_FUNCTION_FLASH;
+			color = <LED_COLOR_ID_WHITE>;
+			flash-max-timeout-us = <250000>;
+			flash-max-microamp = <343750>;
+			led-max-microamp = <55000>;
+		};
+	};
+
 	i2c-gpio-0 {
 		compatible = "i2c-gpio";
 		sda-gpios = <&gpio4 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
@@ -487,6 +514,14 @@ skomer_cfg1 {
 			};
 		};
 	};
+	flash {
+		gpio_flash_default_mode: flash_default {
+			skomer_cfg1 {
+				pins = "GPIO140_B11", "GPIO141_C12";
+				ste,config = <&gpio_out_lo>;
+			};
+		};
+	};
 	/* GPIO that enables the 2.9V SD card level translator */
 	sd-level-translator {
 		sd_level_translator_default: sd_level_translator_default {