[PATCH] arm64: dts: mt8192-asurada-spherion: Add Synaptics trackpad support

[Matthias Brugger]

On 12/09/2024 17:44, Pin-yen Lin wrote:
> Some spherion variants use Synaptics trackpad at address 0x2c in the
> I2C2 bus with the generic HID-over-i2c driver, and this cannot be
> distinguished from the firmware compatible string.
> 
> Support both trackpads in the same devicetree by moving the trackpad
> pinctrl property to i2c2 and adding the node for Synaptics trackpad.
> 
> Signed-off-by: Pin-yen Lin <treapking at chromium.org>

Reviewed-by: Matthias Brugger <matthias.bgg at gmail.com>

> ---
> 
>   .../boot/dts/mediatek/mt8192-asurada-spherion-r0.dts  | 11 +++++++++++
>   arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi      |  4 +---
>   2 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
> index 29aa87e93888..8c485c3ced2c 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
> @@ -79,3 +79,14 @@ headset-codec {
>   &touchscreen {
>   	compatible = "elan,ekth3500";
>   };
> +
> +&i2c2 {
> +	/* synaptics touchpad */
> +	trackpad at 2c {
> +		compatible = "hid-over-i2c";
> +		reg = <0x2c>;
> +		hid-descr-addr = <0x20>;
> +		interrupts-extended = <&pio 15 IRQ_TYPE_LEVEL_LOW>;
> +		wakeup-source;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> index 08d71ddf3668..8dda8b63765b 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> @@ -335,14 +335,12 @@ &i2c2 {
>   	clock-frequency = <400000>;
>   	clock-stretch-ns = <12600>;
>   	pinctrl-names = "default";
> -	pinctrl-0 = <&i2c2_pins>;
> +	pinctrl-0 = <&i2c2_pins>, <&trackpad_pins>;
>   
>   	trackpad at 15 {
>   		compatible = "elan,ekth3000";
>   		reg = <0x15>;
>   		interrupts-extended = <&pio 15 IRQ_TYPE_LEVEL_LOW>;
> -		pinctrl-names = "default";
> -		pinctrl-0 = <&trackpad_pins>;
>   		vcc-supply = <&pp3300_u>;
>   		wakeup-source;
>   	};