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Subject[PATCH 5/7] ARM: dts: qcom: msm8974-klte: Add gpio expander chip
Date
The Samsung Galaxy S5 has a GPIO Expander chip, the PCAL6416A with 16
ports on a i2c bus. These pins are used for WiFi, NFC, IR among other
things.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
---
.../boot/dts/qcom-msm8974-samsung-klte.dts | 29 +++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
index 7b398da9b75ed..29099b83b231d 100644
--- a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
@@ -236,10 +236,25 @@ i2c-gpio-led {
scl-gpios = <&msmgpio 121 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&msmgpio 120 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
pinctrl-names = "default";
- pinctrl-0 = <&i2c_led_pins>;
+ pinctrl-0 = <&i2c_led_gpioex_pins>;

i2c-gpio,delay-us = <2>;

+ gpio_expander: gpio@20 {
+ compatible = "nxp,pcal6416";
+ reg = <0x20>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ vcc-supply = <&pma8084_s4>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&gpioex_pin>;
+
+ reset-gpios = <&msmgpio 145 GPIO_ACTIVE_LOW>;
+ };
+
led-controller@30 {
compatible = "panasonic,an30259a";
reg = <0x30>;
@@ -352,7 +367,7 @@ mux {
};
};

- i2c_led_pins: i2c-led {
+ i2c_led_gpioex_pins: i2c-led-gpioex {
mux {
pins = "gpio120", "gpio121";
function = "gpio";
@@ -360,6 +375,16 @@ mux {
bias-pull-down;
};
};
+
+ gpioex_pin: gpioex {
+ res {
+ pins = "gpio145";
+ function = "gpio";
+
+ bias-pull-up;
+ drive-strength = <2>;
+ };
+ };
};

sdhci@f9824900 {
--
2.27.0
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