Add GPIO keys support to Samsung Galaxy S22 (r0q).

Signed-off-by: Eric Gonçalves <ghatto404@gmail.com>
---
 .../boot/dts/qcom/sm8450-samsung-r0q.dts      | 53 +++++++++++++++----
 1 file changed, 44 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts b/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
index 880d74ae6032..70e953824996 100644
--- a/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
+++ b/arch/arm64/boot/dts/qcom/sm8450-samsung-r0q.dts
@@ -2,11 +2,12 @@
 
 /dts-v1/;
 
+#include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
-
 #include "sm8450.dtsi"
 #include "pm8350.dtsi"
 #include "pm8350c.dtsi"
+#include "pmk8350.dtsi"
 
 / {
 	model = "Samsung Galaxy S22 5G";
@@ -28,13 +29,19 @@ framebuffer: framebuffer@b8000000 {
 		};
 	};
 
-	vph_pwr: regulator-vph-pwr {
-		compatible = "regulator-fixed";
-		regulator-name = "vph_pwr";
-		regulator-min-microvolt = <3700000>;
-		regulator-max-microvolt = <3700000>;
-		regulator-always-on;
-		regulator-boot-on;
+	gpio-keys {
+		compatible = "gpio-keys";
+		autorepeat;
+
+		pinctrl-0 = <&vol_up_n>;
+		pinctrl-names = "default";
+
+		key-vol-up {
+			label = "Volume Up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&pm8350_gpios 6 GPIO_ACTIVE_LOW>;
+			debounce-interval = <15>;
+		};
 	};
 
 	reserved-memory {
@@ -47,6 +54,15 @@ splash-region@b8000000 {
 			no-map;
 		};
 	};
+
+	vph_pwr: regulator-vph-pwr {
+		compatible = "regulator-fixed";
+		regulator-name = "vph_pwr";
+		regulator-min-microvolt = <3700000>;
+		regulator-max-microvolt = <3700000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
 };
 
 &apps_rsc {
@@ -119,8 +135,27 @@ vreg_l1c_1p8: ldo1 {
 	};
 };
 
+&pm8350_gpios {
+	vol_up_n: vol-up-n-state {
+		pins = "gpio6";
+		function = "normal";
+		power-source = <1>;
+		input-enable;
+	};
+};
+
+&pon_pwrkey {
+	status = "okay";
+};
+
+&pon_resin {
+	linux,code = <KEY_VOLUMEDOWN>;
+
+	status = "okay";
+};
+
 &tlmm {
-	gpio-reserved-ranges = <36 4>; /* SPI (not linked to anything) */
+	gpio-reserved-ranges = <36 4>; /* SPI (Unused) */
 };
 
 &usb_1 {
-- 
2.51.0