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Subject[PATCH 3/5] ARM: dts: s5pv210: Add support for GP2A light sensor on Aries
Date
Aries boards have a GP2A light/proximity sensor attached over i2c-gpio.
As the chip outputs a current and the board has no current ADC, a
current shunt resistor and a voltage ADC are used.

Signed-off-by: Jonathan Bakker <xc-racer2@live.ca>
---
arch/arm/boot/dts/s5pv210-aries.dtsi | 50 ++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/s5pv210-aries.dtsi b/arch/arm/boot/dts/s5pv210-aries.dtsi
index d3aeafc0f650..b27d7c2e6dca 100644
--- a/arch/arm/boot/dts/s5pv210-aries.dtsi
+++ b/arch/arm/boot/dts/s5pv210-aries.dtsi
@@ -69,6 +69,18 @@
pinctrl-0 = <&touchkey_vdd_ena>;
};

+ gp2a_vled: regulator-fixed-2 {
+ compatible = "regulator-fixed";
+ regulator-name = "VLED";
+ enable-active-high;
+ gpio = <&gpj1 4 GPIO_ACTIVE_HIGH>;
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&gp2a_power>;
+ };
+
wifi_pwrseq: wifi-pwrseq {
compatible = "mmc-pwrseq-simple";
reset-gpios = <&gpg1 2 GPIO_ACTIVE_LOW>;
@@ -468,9 +480,21 @@
pinctrl-names = "default";
pinctrl-0 = <&prox_i2c_pins>;

- status = "disabled";
+ light-sensor@44 {
+ compatible = "sharp,gp2ap002a00f";
+ reg = <0x44>;
+ interrupt-parent = <&gph0>;
+ interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+ vdd-supply = <&gp2a_vled>;
+ vio-supply = <&gp2a_vled>;
+ io-channels = <&gp2a_shunt>;
+ io-channel-names = "alsout";
+ sharp,proximity-far-hysteresis = /bits/ 8 <0x40>;
+ sharp,proximity-close-hysteresis = /bits/ 8 <0x20>;

- /* Sharp gp2a prox/light sensor, incomplete mainline binding */
+ pinctrl-names = "default";
+ pinctrl-0 = <&gp2a_irq>;
+ };
};

i2c_magnetometer: i2c-gpio-7 {
@@ -543,6 +567,14 @@
vdd-supply = <&ldo4_reg>;

status = "okay";
+
+ gp2a_shunt: current-sense-shunt {
+ compatible = "current-sense-shunt";
+ io-channels = <&adc 9>;
+ shunt-resistor-micro-ohms = <47000000>; /* 47 ohms */
+ #io-channel-cells = <0>;
+ io-channel-ranges;
+ };
};

&fimd {
@@ -618,6 +650,13 @@
samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
};

+ gp2a_irq: gp2a-irq {
+ samsung,pins = "gph0-2";
+ samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
+ samsung,pin-pud = <S3C64XX_PIN_PULL_DOWN>;
+ samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
+ };
+
pmic_dvs_pins: pmic-dvs-pins {
samsung,pins = "gph0-3", "gph0-4", "gph0-5";
samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
@@ -686,6 +725,13 @@
samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
};

+ gp2a_power: gp2a-power {
+ samsung,pins = "gpj1-4";
+ samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+ samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
+ samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
+ };
+
touchkey_i2c_pins: touchkey-i2c-pins {
samsung,pins = "gpj3-0", "gpj3-1";
samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
--
2.20.1
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