[PATCH 06/23] ARM: dts: imx7-mba7: Mark gpio-buttons as wakeup-source

[Alexander Stein]

I2C expander is capable of generating an IRQ during powersave, so the
attached buttons can be used for waking up the system.

Signed-off-by: Alexander Stein <alexander.stein at ew.tq-group.com>
---
 arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
index 2aef830cf1f2..bc5d2e4f0eb1 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7-mba7.dtsi
@@ -32,11 +32,18 @@ chosen {
 	gpio_buttons: gpio-keys {
 		compatible = "gpio-keys";
 
+		/*
+		 * NOTE: These buttons are attached to a GPIO-expander.
+		 * Enabling wakeup-source, enables wakeup on all inputs.
+		 * If PE_GPIO[3..6] are used as inputs, they cause a
+		 * wakeup as well.
+		 */
 		button-0 {
 			/* #SWITCH_A */
 			label = "S11";
 			linux,code = <KEY_1>;
 			gpios = <&pca9555 13 GPIO_ACTIVE_LOW>;
+			wakeup-source;
 		};
 
 		button-1 {
@@ -44,6 +51,7 @@ button-1 {
 			label = "S12";
 			linux,code = <KEY_2>;
 			gpios = <&pca9555 14 GPIO_ACTIVE_LOW>;
+			wakeup-source;
 		};
 
 		button-2 {
@@ -51,6 +59,7 @@ button-2 {
 			label = "S13";
 			linux,code = <KEY_3>;
 			gpios = <&pca9555 15 GPIO_ACTIVE_LOW>;
+			wakeup-source;
 		};
 	};
 
-- 
2.34.1