From: Rudraksha Gupta <[email protected]> Add camera flash support for the Samsung Galaxy Express (expressatt).
The flash IC uses a one-wire pulse-count protocol on GPIO 3, powered by a GPIO-controlled fixed regulator on PMIC MPP 4. The regulator is modeled as a regulator-fixed node and supplied to the flash IC via vin-supply. Downstream references: Link: https://github.com/LineageOS/android_kernel_samsung_d2/blob/stable/cm-12.0-YNG4N/drivers/leds/Makefile#L51 Link: https://github.com/LineageOS/android_kernel_samsung_d2/blob/stable/cm-12.0-YNG4N/arch/arm/mach-msm/board-apexq-camera.c#L591 Reviewed-by: David Heidelberg <[email protected]> Signed-off-by: Rudraksha Gupta <[email protected]> --- .../dts/qcom/qcom-msm8960-samsung-expressatt.dts | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/arch/arm/boot/dts/qcom/qcom-msm8960-samsung-expressatt.dts b/arch/arm/boot/dts/qcom/qcom-msm8960-samsung-expressatt.dts index c4b98af6955d..ad5169a60937 100644 --- a/arch/arm/boot/dts/qcom/qcom-msm8960-samsung-expressatt.dts +++ b/arch/arm/boot/dts/qcom/qcom-msm8960-samsung-expressatt.dts @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include <dt-bindings/input/input.h> +#include <dt-bindings/leds/common.h> #include <dt-bindings/reset/qcom,gcc-msm8960.h> #include "qcom-msm8960.dtsi" @@ -61,6 +62,32 @@ touchkey_enable: touchkey-enable { regulator-boot-on; }; + flash_gpio_reg: regulator-flash { + compatible = "regulator-fixed"; + regulator-name = "flash_led_en"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpio = <&pm8921_mpps 4 GPIO_ACTIVE_HIGH>; + enable-active-high; + pinctrl-0 = <&flash_led_unlock>; + pinctrl-names = "default"; + }; + + camera_flash: led-controller { + compatible = "richtek,rt8515"; + enf-gpios = <&tlmm 3 GPIO_ACTIVE_HIGH>; + vin-supply = <&flash_gpio_reg>; + richtek,rfs-ohms = <16000>; + pinctrl-0 = <&cam_flash_en>; + pinctrl-names = "default"; + + led { + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + flash-max-timeout-us = <250000>; + }; + }; + i2c-gpio-touchkey { compatible = "i2c-gpio"; #address-cells = <1>; @@ -247,6 +274,13 @@ touchkey_irq_pin: touchkey-irq-state { drive-strength = <2>; bias-disable; }; + + cam_flash_en: cam-flash-en-state { + pins = "gpio3"; + function = "gpio"; + drive-strength = <16>; + bias-pull-down; + }; }; &pm8921 { @@ -572,3 +606,12 @@ magnetometer@2e { /* TODO: Figure out Mount Matrix */ }; }; + +&pm8921_mpps { + flash_led_unlock: flash-led-unlock-state { + pins = "mpp4"; + function = "digital"; + output-low; + power-source = <PM8921_GPIO_S4>; + }; +}; -- 2.53.0
