linux-kernel - Re: [PATCH 2/7] arm64: dts: qcom: msm8998-xperia: Add RMI4 touchscreen support

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Message-ID: <YTdsBg78ErgxqFXy@ripper>
Date:   Tue, 7 Sep 2021 06:41:26 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
Cc:     agross@...nel.org, robh+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, konrad.dybcio@...ainline.org,
        marijn.suijten@...ainline.org, martin.botka@...ainline.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        paul.bouchara@...ainline.org
Subject: Re: [PATCH 2/7] arm64: dts: qcom: msm8998-xperia: Add RMI4
 touchscreen support

On Fri 03 Sep 11:09 PDT 2021, AngeloGioacchino Del Regno wrote:

> All of the devices in the Sony Yoshino platform are using a Synaptics
> RMI4-compatible touch IC with identical pins and supplies: enable the
> I2C-5 bus and add the rmi4-i2c node along with the required pin
> configurations.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
> Reviewed-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
>  .../dts/qcom/msm8998-sony-xperia-yoshino.dtsi | 60 +++++++++++++++++++
>  1 file changed, 60 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi b/arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi
> index b07cbc759807..2fe53e4675d5 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi
> @@ -30,6 +30,15 @@ board_vbat: vbat-regulator {
>  		regulator-boot-on;
>  	};
>  
> +	touch_vddio_vreg: touch-vddio-vreg {
> +		compatible = "regulator-fixed";
> +		regulator-name = "touch_vddio_vreg";
> +		startup-delay-us = <10000>;
> +		gpio = <&tlmm 133 GPIO_ACTIVE_HIGH>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&ts_vddio_en>;
> +	};
> +
>  	vph_pwr: vph-pwr-regulator {
>  		compatible = "regulator-fixed";
>  		regulator-name = "vph_pwr";
> @@ -134,6 +143,42 @@ ramoops@...00000 {
>  	};
>  };
>  
> +&blsp1_i2c5 {
> +	status = "okay";
> +	clock-frequency = <355000>;
> +
> +	touchscreen: synaptics-rmi4-i2c@2c {

"touchscreen" sounds like a better "generic name" for the node.

Haven't checked the following patches yet, do you need the label?

Regards,
Bjorn

> +		compatible = "syna,rmi4-i2c";
> +		reg = <0x2c>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		interrupts-extended = <&tlmm 125 IRQ_TYPE_EDGE_FALLING>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&ts_int_n>;
> +
> +		vdd-supply = <&vreg_l28_3p0>;
> +		vio-supply = <&touch_vddio_vreg>;
> +
> +		syna,reset-delay-ms = <220>;
> +		syna,startup-delay-ms = <1000>;
> +
> +		rmi4-f01@1 {
> +			reg = <0x01>;
> +			syna,nosleep-mode = <1>;
> +		};
> +
> +		rmi4-f11@11 {
> +			reg = <0x11>;
> +			syna,sensor-type = <1>;
> +		};
> +	};
> +};
> +
> +&blsp1_i2c5_sleep {
> +	bias-disable;
> +};
> +
>  &blsp2_uart1 {
>  	status = "okay";
>  };
> @@ -448,6 +493,21 @@ hall_sensor0_default: acc-cover-open {
>  		drive-strength = <2>;
>  		input-enable;
>  	};
> +
> +	ts_int_n: ts-int-n {
> +		pins = "gpio125";
> +		function = "gpio";
> +		drive-strength = <8>;
> +		bias-pull-up;
> +	};
> +
> +	ts_vddio_en: ts-vddio-en-default {
> +		pins = "gpio133";
> +		function = "gpio";
> +		bias-disable;
> +		drive-strength = <2>;
> +		output-low;
> +	};
>  };
>  
>  /*
> -- 
> 2.32.0
>