linux-kernel - Re: [PATCH v3] ARM: dts: imx: e60k02: Add touchscreen

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Date:   Wed, 9 Nov 2022 10:23:50 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        alistair@...stair23.me
Subject: Re: [PATCH v3] ARM: dts: imx: e60k02: Add touchscreen

Hi Andreas,

On 22-11-08, Andreas Kemnade wrote:
> Add the touchscreen now, since the driver is available.
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
> Changes in v3: no phandles pointing from dtsi to dts

Thanks for this change...

> Changes in v2: fix pinmux naming
> 
>  arch/arm/boot/dts/e60k02.dtsi              |  9 ++++++++-
>  arch/arm/boot/dts/imx6sl-tolino-shine3.dts | 12 ++++++++++++
>  arch/arm/boot/dts/imx6sll-kobo-clarahd.dts | 12 ++++++++++++
>  3 files changed, 32 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/e60k02.dtsi b/arch/arm/boot/dts/e60k02.dtsi
> index 935e2359f8df..99091db3ab2a 100644
> --- a/arch/arm/boot/dts/e60k02.dtsi
> +++ b/arch/arm/boot/dts/e60k02.dtsi
> @@ -104,7 +104,14 @@ &i2c2 {
>  	clock-frequency = <100000>;
>  	status = "okay";
>  
> -	/* TODO: CYTTSP5 touch controller at 0x24 */
> +	cyttsp5: touchscreen@24 {
> +		compatible = "cypress,tt21000";
> +		reg = <0x24>;
> +		interrupt-parent = <&gpio5>;
> +		interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
> +		reset-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
> +		vdd-supply = <&ldo5_reg>;
> +	};

but we still have a cross-reference to the .dtsi file here. Therefore I
said to move the interrupt/reset-gpio into the dts file too. I know this
is a kind of a nitpick but I really don't like such cross-references.

Regards,
  Marco

>  
>  	/* TODO: TPS65185 PMIC for E Ink at 0x68 */
>  
> diff --git a/arch/arm/boot/dts/imx6sl-tolino-shine3.dts b/arch/arm/boot/dts/imx6sl-tolino-shine3.dts
> index e3f1e8d79528..e98dc302e2e3 100644
> --- a/arch/arm/boot/dts/imx6sl-tolino-shine3.dts
> +++ b/arch/arm/boot/dts/imx6sl-tolino-shine3.dts
> @@ -26,6 +26,11 @@ / {
>  	compatible = "kobo,tolino-shine3", "fsl,imx6sl";
>  };
>  
> +&cyttsp5 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_cyttsp5_gpio>;
> +};
> +
>  &gpio_keys {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_gpio_keys>;
> @@ -52,6 +57,13 @@ &iomuxc {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_hog>;
>  
> +	pinctrl_cyttsp5_gpio: cyttsp5-gpiogrp {
> +		fsl,pins = <
> +			MX6SL_PAD_SD1_DAT3__GPIO5_IO06                0x17059 /* TP_INT */
> +			MX6SL_PAD_SD1_DAT2__GPIO5_IO13                0x10059 /* TP_RST */
> +		>;
> +	};
> +
>  	pinctrl_gpio_keys: gpio-keysgrp {
>  		fsl,pins = <
>  			MX6SL_PAD_SD1_DAT1__GPIO5_IO08	0x17059	/* PWR_SW */
> diff --git a/arch/arm/boot/dts/imx6sll-kobo-clarahd.dts b/arch/arm/boot/dts/imx6sll-kobo-clarahd.dts
> index 90b32f5eb529..6bb80720ea66 100644
> --- a/arch/arm/boot/dts/imx6sll-kobo-clarahd.dts
> +++ b/arch/arm/boot/dts/imx6sll-kobo-clarahd.dts
> @@ -36,6 +36,11 @@ &cpu0 {
>  	soc-supply = <&dcdc1_reg>;
>  };
>  
> +&cyttsp5 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_cyttsp5_gpio>;
> +};
> +
>  &gpio_keys {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_gpio_keys>;
> @@ -62,6 +67,13 @@ &iomuxc {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_hog>;
>  
> +	pinctrl_cyttsp5_gpio: cyttsp5-gpiogrp {
> +		fsl,pins = <
> +			MX6SLL_PAD_SD1_DATA3__GPIO5_IO06                0x17059 /* TP_INT */
> +			MX6SLL_PAD_SD1_DATA2__GPIO5_IO13                0x10059 /* TP_RST */
> +		>;
> +	};
> +
>  	pinctrl_gpio_keys: gpio-keysgrp {
>  		fsl,pins = <
>  			MX6SLL_PAD_SD1_DATA1__GPIO5_IO08	0x17059	/* PWR_SW */
> -- 
> 2.30.2
> 
> 
>