Re: [PATCH v3 12/21] ARM: dts: imx6-apalis: Add touchscreens used on Toradex eval boards

[Marcel Ziswiler <marcel.ziswiler@toradex.com>]

Hi Philippe

On Wed, 2019-08-07 at 08:26 +0000, Philippe Schenker wrote:
> This commit adds the touchscreens from Toradex so one can enable it.
> 
> Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
> 
> ---
> 
> Changes in v3:
> - Fix commit title to "...imx6-apalis:..."
> 
> Changes in v2:
> - Deleted touchrevolution downstream stuff
> - Use generic node name
> - Put a better comment in there
> 
>  arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts  | 31
> +++++++++++++++++++
>  arch/arm/boot/dts/imx6q-apalis-eval.dts       | 13 ++++++++
>  arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts | 13 ++++++++
>  arch/arm/boot/dts/imx6q-apalis-ixora.dts      | 13 ++++++++
>  4 files changed, 70 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
> b/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
> index 9a5d6c94cca4..763fb5e90bd3 100644
> --- a/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
> +++ b/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
> @@ -168,6 +168,21 @@
>  &i2c3 {
>  	status = "okay";
>  
> +	/*
> +	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> PWM<C>,
> +	 * aka pwm2, pwm3. so if you enable touchscreen, disable the
> pwms
> +	 */
> +	touchscreen@4a {
> +		compatible = "atmel,maxtouch";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_pcap_1>;
> +		reg = <0x4a>;
> +		interrupt-parent = <&gpio1>;
> +		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;		/*
> SODIMM 28 */
> +		reset-gpios = <&gpio2 10 GPIO_ACTIVE_HIGH>;	/*
> SODIMM 30 */
> +		status = "disabled";
> +	};
> +
>  	/* M41T0M6 real time clock on carrier board */
>  	rtc_i2c: rtc@68 {
>  		compatible = "st,m41t0";
> @@ -175,6 +190,22 @@
>  	};
>  };
>  
> +&iomuxc {
> +	pinctrl_pcap_1: pcap-1 {
> +		fsl,pins = <
> +			MX6QDL_PAD_GPIO_9__GPIO1_IO09	0x1b0b0 /*
> SODIMM 28 */
> +			MX6QDL_PAD_SD4_DAT2__GPIO2_IO10	0x1b0b0 /*
> SODIMM 30 */
> +		>;
> +	};

What exactly are the above which get used further up vs. the below
which do not seem to get used anywhere?

> +	pinctrl_mxt_ts: mxt-ts {
> +		fsl,pins = <
> +			MX6QDL_PAD_EIM_CS1__GPIO2_IO24	0x130b0 /*
> SODIMM 107 */
> +			MX6QDL_PAD_SD2_DAT1__GPIO1_IO14	0x130b0 /*
> SODIMM 106 */
> +		>;
> +	};
> +};
> +
>  &ipu1_di0_disp0 {
>  	remote-endpoint = <&lcd_display_in>;
>  };
> diff --git a/arch/arm/boot/dts/imx6q-apalis-eval.dts
> b/arch/arm/boot/dts/imx6q-apalis-eval.dts
> index 0edd3043d9c1..4665e15b196d 100644
> --- a/arch/arm/boot/dts/imx6q-apalis-eval.dts
> +++ b/arch/arm/boot/dts/imx6q-apalis-eval.dts
> @@ -167,6 +167,19 @@
>  &i2c1 {
>  	status = "okay";
>  
> +	/*
> +	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> PWM<C>,
> +	 * aka pwm2, pwm3. so if you enable touchscreen, disable the
> pwms
> +	 */
> +	touchscreen@4a {
> +		compatible = "atmel,maxtouch";
> +		reg = <0x4a>;
> +		interrupt-parent = <&gpio6>;
> +		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
> +		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13
> */

Wouldn't above two pins also need resp. pinctrl entries?

> +		status = "disabled";
> +	};
> +
>  	pcie-switch@58 {
>  		compatible = "plx,pex8605";
>  		reg = <0x58>;
> diff --git a/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
> b/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
> index b94bb687be6b..a3fa04a97d81 100644
> --- a/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
> +++ b/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
> @@ -172,6 +172,19 @@
>  &i2c1 {
>  	status = "okay";
>  
> +	/*
> +	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> PWM<C>,
> +	 * aka pwm2, pwm3. so if you enable touchscreen, disable the
> pwms
> +	 */
> +	touchscreen@4a {
> +		compatible = "atmel,maxtouch";
> +		reg = <0x4a>;
> +		interrupt-parent = <&gpio6>;
> +		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
> +		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13
> */

Ditto.

> +		status = "disabled";
> +	};
> +
>  	/* M41T0M6 real time clock on carrier board */
>  	rtc_i2c: rtc@68 {
>  		compatible = "st,m41t0";
> diff --git a/arch/arm/boot/dts/imx6q-apalis-ixora.dts
> b/arch/arm/boot/dts/imx6q-apalis-ixora.dts
> index 302fd6adc8a7..5ba49d0f4880 100644
> --- a/arch/arm/boot/dts/imx6q-apalis-ixora.dts
> +++ b/arch/arm/boot/dts/imx6q-apalis-ixora.dts
> @@ -171,6 +171,19 @@
>  &i2c1 {
>  	status = "okay";
>  
> +	/*
> +	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>,
> PWM<C>,
> +	 * aka pwm2, pwm3. so if you enable touchscreen, disable the
> pwms
> +	 */
> +	touchscreen@4a {
> +		compatible = "atmel,maxtouch";
> +		reg = <0x4a>;
> +		interrupt-parent = <&gpio6>;
> +		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
> +		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13
> */

Ditto.

> +		status = "disabled";
> +	};
> +
>  	eeprom@50 {
>  		compatible = "atmel,24c02";
>  		reg = <0x50>;

Cheers

Marcel