ARM: dts: s5pv210: Add support for GP2A light sensor on Aries

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>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/arch/arm/boot/dts/s5pv210-aries.dtsi b/arch/arm/boot/dts/s5pv210-aries.dtsi
index d3aeafc0f650788270b8835a5b1a8bcf0ada7838..b27d7c2e6dcaed1dd08108aa2354b9fab0c19c36 100644 (file)
--- 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>;