RZ/G3E SMARC EVK has 3 user buttons called USER_SW1, USER_SW2 and
USER_SW3 and SLEEP button with NMI support. Add a DT node in device tree
to instantiate the gpio-keys driver for these buttons.
The system can enter into STR state by pressing the sleep button and
wakeup from STR is done by pressing power button. The USER_SW{1,2,3}
configured as wakeup-source, so it can wakeup the system during s2idle.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v1->v2:
* Added support for sleep button
* Dropped the extra spaces after the define keywords for KEY_*_GPIO.
* Dropped /delete-node/ keys as KEY_SLEEP will always present.
* Moved input.h to r9a09g047e57-smarc.dts
---
.../boot/dts/renesas/r9a09g047e57-smarc.dts | 37 +++++++++++++++++++
.../boot/dts/renesas/renesas-smarc2.dtsi | 31 ++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
index 2454a9743df2..8efc4f0c6517 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
@@ -8,6 +8,7 @@
/dts-v1/;
/* Switch selection settings */
+#define SW_LCD_EN 0
#define SW_GPIO8_CAN0_STB 0
#define SW_GPIO9_CAN1_STB 0
#define SW_LCD_EN 0
@@ -15,7 +16,16 @@
#define SW_SD0_DEV_SEL 0
#define SW_SDIO_M2E 0
+#define PMOD_GPIO4 0
+#define PMOD_GPIO6 0
+#define PMOD_GPIO7 0
+
+#define KEY_1_GPIO RZG3E_GPIO(3, 1)
+#define KEY_2_GPIO RZG3E_GPIO(8, 4)
+#define KEY_3_GPIO RZG3E_GPIO(8, 5)
+
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
#include <dt-bindings/pinctrl/renesas,r9a09g047-pinctrl.h>
#include "r9a09g047e57.dtsi"
#include "rzg3e-smarc-som.dtsi"
@@ -79,6 +89,29 @@ &i2c0 {
pinctrl-names = "default";
};
+&keys{
+ key-sleep {
+ pinctrl-0 = <&nmi_pins>;
+ pinctrl-names = "default";
+
+ interrupts-extended = <&icu 0 IRQ_TYPE_EDGE_FALLING>;
+ linux,code = <KEY_SLEEP>;
+ label = "SLEEP";
+ debounce-interval = <20>;
+ };
+#if PMOD_GPIO4
+ /delete-node/ key-1;
+#endif
+
+#if SW_LCD_EN || PMOD_GPIO6
+ /delete-node/ key-2;
+#endif
+
+#if SW_LCD_EN || PMOD_GPIO7
+ /delete-node/ key-3;
+#endif
+};
+
&pinctrl {
canfd_pins: canfd {
can1_pins: can1 {
@@ -97,6 +130,10 @@ i2c0_pins: i2c0 {
<RZG3E_PORT_PINMUX(D, 5, 4)>; /* SDA0 */
};
+ nmi_pins: nmi {
+ pinmux = <RZG3E_PORT_PINMUX(S, 0, 0)>; /* NMI */
+ };
+
scif_pins: scif {
pins = "SCIF_TXD", "SCIF_RXD";
renesas,output-impedance = <1>;
diff --git a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
index 3cac292f20b3..58561da3007a 100644
--- a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
+++ b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
@@ -23,6 +23,9 @@
* SW_GPIO9_CAN1_STB:
* 0 - Connect to GPIO9 PMOD (default)
* 1 - Connect to CAN1 transceiver STB pin
+ *
+ * GPIO keys are enabled by default. Use PMOD_GPIO macros to disable them
+ * if needed.
*/
/ {
@@ -53,6 +56,34 @@ can_transceiver1: can-phy1 {
max-bitrate = <8000000>;
status = "disabled";
};
+
+ keys: keys {
+ compatible = "gpio-keys";
+
+ key-1 {
+ interrupts-extended = <&pinctrl KEY_1_GPIO IRQ_TYPE_EDGE_FALLING>;
+ linux,code = <KEY_1>;
+ label = "USER_SW1";
+ wakeup-source;
+ debounce-interval = <20>;
+ };
+
+ key-2 {
+ interrupts-extended = <&pinctrl KEY_2_GPIO IRQ_TYPE_EDGE_FALLING>;
+ linux,code = <KEY_2>;
+ label = "USER_SW2";
+ wakeup-source;
+ debounce-interval = <20>;
+ };
+
+ key-3 {
+ interrupts-extended = <&pinctrl KEY_3_GPIO IRQ_TYPE_EDGE_FALLING>;
+ linux,code = <KEY_3>;
+ label = "USER_SW3";
+ wakeup-source;
+ debounce-interval = <20>;
+ };
+ };
};
&canfd {
--
2.43.0
