linux-kernel - Re: [PATCH v2 6/6] arch/arm: reMarkable2: Enable wacom

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Message-ID: <20210122153231.qqiuwltvzzg52phg@pengutronix.de>
Date:   Fri, 22 Jan 2021 16:32:31 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Alistair Francis <alistair@...stair23.me>
Cc:     dmitry.torokhov@...il.com, linux-input@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de, alistair23@...il.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/6] arch/arm: reMarkable2: Enable wacom_i2c

Hi,

thanks for the patch.

On 21-01-20 22:56, Alistair Francis wrote:
> Enable the wacom_i2c touchscreen for the reMarkable2.
> 
> Signed-off-by: Alistair Francis <alistair@...stair23.me>
> ---
>  arch/arm/boot/dts/imx7d-remarkable2.dts | 41 +++++++++++++++++++++++++
>  arch/arm/configs/imx_v6_v7_defconfig    |  1 +

Those two changes should be splitted and the dts patch should be named:
"ARM: dts: imx7d: remarkable2: add wacom digitizer device".

>  2 files changed, 42 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx7d-remarkable2.dts b/arch/arm/boot/dts/imx7d-remarkable2.dts
> index fba55a0e028a..8052d884a5e5 100644
> --- a/arch/arm/boot/dts/imx7d-remarkable2.dts
> +++ b/arch/arm/boot/dts/imx7d-remarkable2.dts
> @@ -150,6 +150,30 @@ &dma_apbh {
>  	status = "disabled";
>  };
>  
> +&i2c1 {
> +	clock-frequency = <400000>;
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&pinctrl_i2c1>;
> +	pinctrl-1 = <&pinctrl_i2c1>;

No need to specify the sleep state if both are using the same pinctrl
config.

> +	status = "okay";
> +
> +	digitizer: wacom-i2c@9 {

this should be:
        wacom_digitizer: digitizer@9 {

> +		pinctrl-names = "default", "sleep";
> +		pinctrl-0 = <&pinctrl_wacom>;
> +		pinctrl-1 = <&pinctrl_wacom>;

Same here, sleep and default refer to the same state.

> +		compatible = "wacom,wacom-i2c";
> +		reg = <0x09>;

compatible and reg are always the first to properties.

> +		interrupt-parent = <&gpio1>;
> +		interrupts = <1 2>;

Please use defines.

> +		flip-tilt-x;
> +		flip-tilt-y;
> +		flip-pos-x;
> +		flip-pos-y;
> +		flip-distance;
> +		vdd-supply = <&reg_digitizer>;

Where is this regulator added?

> +	};
> +};
> +
>  &sdma {
>  	status = "okay";
>  };
> @@ -221,6 +245,16 @@ &wdog1 {
>  };
>  
>  &iomuxc_lpsr {
> +	pinctrl_wacom: wacomgrp {
> +		fsl,pins = <
> +			/*MX7D_PAD_LPSR_GPIO1_IO00__GPIO1_IO0	0x00000074 /* WACOM RESET */
> +			MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1	0x00000034 /* WACOM INT */
> +			MX7D_PAD_LPSR_GPIO1_IO04__GPIO1_IO4	0x00000074 /* PDCTB */
> +			/*MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5	0x00000014 /* FWE */
> +			/*MX7D_PAD_LPSR_GPIO1_IO06__GPIO1_IO6	0x00000014 /* WACOM PWR ENABLE */
> +		>;
> +	};

Pls, sort this alphabetical.

> +
>  	pinctrl_digitizer_reg: digitizerreggrp {
>  		fsl,pins = <
>  			/* DIGITIZER_PWR_EN */
> @@ -236,6 +270,13 @@ MX7D_PAD_SAI1_RX_SYNC__GPIO6_IO16	0x59
>  		>;
>  	};
>  
> +	pinctrl_i2c1: i2c1grp {
> +		fsl,pins = <
> +			MX7D_PAD_I2C1_SDA__I2C1_SDA		0x4000007f
> +			MX7D_PAD_I2C1_SCL__I2C1_SCL		0x4000007f
> +		>;
> +	};
> +
>  	pinctrl_uart1: uart1grp {
>  		fsl,pins = <
>  			MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX	0x79
> diff --git a/arch/arm/configs/imx_v6_v7_defconfig b/arch/arm/configs/imx_v6_v7_defconfig
> index fa9229616106..2fc8dc6a8b0a 100644
> --- a/arch/arm/configs/imx_v6_v7_defconfig
> +++ b/arch/arm/configs/imx_v6_v7_defconfig
> @@ -167,6 +167,7 @@ CONFIG_TOUCHSCREEN_DA9052=y
>  CONFIG_TOUCHSCREEN_EGALAX=y
>  CONFIG_TOUCHSCREEN_GOODIX=y
>  CONFIG_TOUCHSCREEN_ILI210X=y
> +CONFIG_TOUCHSCREEN_WACOM_I2C=y
>  CONFIG_TOUCHSCREEN_MAX11801=y
>  CONFIG_TOUCHSCREEN_IMX6UL_TSC=y
>  CONFIG_TOUCHSCREEN_EDT_FT5X06=y
> -- 
> 2.29.2
> 
> 
> 

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