ARM: dts: am437x-idk: add gpio-based power key

AM437x IDK board has a User Switch which we can
program to whatever we want. Because this board
doesn't have a PMIC which can give us power button
presses, let's use this user switch as a gpio-keys
power button.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am437x-idk-evm.dts b/arch/arm/boot/dts/am437x-idk-evm.dts
index b52dd0a72d61ba9008dc06695cfdc8e0169e44bc..f9a17e2ca8cb068dfa63034d43a1077fb0a606bb 100644 (file)
--- a/arch/arm/boot/dts/am437x-idk-evm.dts
+++ b/arch/arm/boot/dts/am437x-idk-evm.dts
@@ -96,9 +96,29 @@
                regulator-boot-on;
                vin-supply = <&v1_5dreg>;
        };
+
+       gpio_keys: gpio_keys {
+               compatible = "gpio-keys";
+               pinctrl-names = "default";
+               pinctrl-0 = <&gpio_keys_pins_default>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               switch@0 {
+                       label = "power-button";
+                       linux,code = <KEY_POWER>;
+                       gpios = <&gpio4 2 GPIO_ACTIVE_LOW>;
+               };
+       };
 };
 
 &am43xx_pinmux {
+       gpio_keys_pins_default: gpio_keys_pins_default {
+               pinctrl-single,pins = <
+                       0x1b8 (PIN_INPUT | MUX_MODE7)   /* cam0_field.gpio4_2 */
+               >;
+       };
+
        i2c0_pins_default: i2c0_pins_default {
                pinctrl-single,pins = <
                        0x188 (PIN_INPUT | SLEWCTRL_FAST | MUX_MODE0) /* i2c0_sda.i2c0_sda */
@@ -282,6 +302,10 @@
        status = "okay";
 };
 
+&gpio4 {
+       status = "okay";
+};
+
 &gpio5 {
        status = "okay";
 };