Re: [PATCH v4 2/2] arm64: dts: imx93-var-som: Add Variscite VAR-SOM-MX93

[Mathieu Othacehe]

Hello Stefan,

> there are neither gpio-line-names defined for this GPIO expander nor the
> SOC. Are there no GPIOs which can be accessed from userspace?

The carrier board schematic is here:
https://www.variscite.com/wp-content/uploads/2023/01/symphony-board_VAR-SOM-MX93.pdf

All the pin headers are mapped to specific functions. On the other,
already mainlined device-trees, that are based on the same "Symphony"
carrier board, there are however gpio-keys for three buttons:


	gpio-keys {
		compatible = "gpio-keys";

		key-back {
			label = "Back";
			gpios = <&pca9534 1 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_BACK>;
		};

		key-home {
			label = "Home";
			gpios = <&pca9534 2 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_HOME>;
		};

		key-menu {
			label = "Menu";
			gpios = <&pca9534 3 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_MENU>;
		};
	};

I can add that in v5.

Thanks,

Mathieu