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@xxxxxxxxxxxxxxx>
---
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
