linux-kernel - [PATCH v2] arm64: dts: qcom: sdm845-tama: Add volume up and camera GPIO keys

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Date:   Tue, 10 Jan 2023 00:41:32 +0100
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     phone-devel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] arm64: dts: qcom: sdm845-tama: Add volume up and camera GPIO keys

Tama has four GPIO-wired keys: two for camera focus and shutter /
snapshot, and two more for volume up and down.  As per the comment these
used to not work because the necessary pin bias was missing, which is
now set via pinctrl on pm8998_gpios.

The missing bias has also been added to the existing volume down button,
which receives a node name and label cleanup at the same time to be more
consistent with other DTS and the newly added buttons.  Its deprecated
gpio-key,wakeup property has also been replaced with wakeup-source.

Note that volume up is also available through the usual PON RESIN node,
but unlike other platforms only triggers when the power button is held
down at the same time making it unsuitable to serve as KEY_VOLUMEUP.

Fixes: 30a7f99befc6 ("arm64: dts: qcom: Add support for SONY Xperia XZ2 / XZ2C / XZ3 (Tama platform)")
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
---

Changes since v1:
- Rebased on next-20230109 and replace pm8998_gpio with plural
  pm8998_gpios phandle label.

v1: https://lore.kernel.org/linux-arm-msm/20221222190656.31664-1-marijn.suijten@somainline.org/

 .../dts/qcom/sdm845-sony-xperia-tama.dtsi     | 72 +++++++++++++++++--
 1 file changed, 68 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama.dtsi b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama.dtsi
index df92e8d7bf30..c611eab56724 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
 #include "sdm845.dtsi"
 #include "pm8005.dtsi"
@@ -17,14 +18,43 @@ / {
 	gpio-keys {
 		compatible = "gpio-keys";
 
-		/* Neither Camera Focus, nor Camera Shutter seem to work... */
+		pinctrl-0 = <&focus_n &snapshot_n &vol_down_n &vol_up_n>;
+		pinctrl-names = "default";
 
-		key-vol-down {
-			label = "volume_down";
+		key-camera-focus {
+			label = "Camera Focus";
+			gpios = <&pm8998_gpios 2 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_CAMERA_FOCUS>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			wakeup-source;
+		};
+
+		key-camera-snapshot {
+			label = "Camera Snapshot";
+			gpios = <&pm8998_gpios 7 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_CAMERA>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			wakeup-source;
+		};
+
+		key-volume-down {
+			label = "Volume Down";
 			gpios = <&pm8998_gpios 5 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEDOWN>;
 			debounce-interval = <15>;
-			gpio-key,wakeup;
+			linux,can-disable;
+			wakeup-source;
+		};
+
+		key-volume-up {
+			label = "Volume Up";
+			gpios = <&pm8998_gpios 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_VOLUMEUP>;
+			debounce-interval = <15>;
+			linux,can-disable;
+			wakeup-source;
 		};
 	};
 
@@ -358,6 +388,40 @@ &i2c14 {
 	/* AMS TCS3490 RGB+IR color sensor @ 72 */
 };
 
+&pm8998_gpios {
+	focus_n: focus-n-state {
+		pins = "gpio2";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+
+	vol_down_n: vol-down-n-state {
+		pins = "gpio5";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+
+	vol_up_n: vol-up-n-state {
+		pins = "gpio6";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+
+	snapshot_n: snapshot-n-state {
+		pins = "gpio7";
+		function = PMIC_GPIO_FUNC_NORMAL;
+		power-source = <0>;
+		bias-pull-up;
+		input-enable;
+	};
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
-- 
2.39.0