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

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Message-ID: <d1e1b18c-0d17-2145-0fc2-3f9be8d68fe9@linaro.org>
Date:   Thu, 22 Dec 2022 20:18:29 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        phone-devel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...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: Re: [PATCH] arm64: dts: qcom: sdm845-tama: Add volume up and camera
 GPIO keys



On 22.12.2022 20:06, Marijn Suijten wrote:
> 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_gpio(s).
> 
> 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.
Sounds rather intriguing..

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

Konrad
>  .../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 87dd0fc36747..6390dadd5f82 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_gpio 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_gpio 7 GPIO_ACTIVE_LOW>;
> +			linux,code = <KEY_CAMERA>;
> +			debounce-interval = <15>;
> +			linux,can-disable;
> +			wakeup-source;
> +		};
> +
> +		key-volume-down {
> +			label = "Volume Down";
>  			gpios = <&pm8998_gpio 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_gpio 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_gpio {
> +	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";
>  };