milkv-duo LED definition

[System64fumo]

Hello, I'm not sure if this was ever planned on being added/supported or if this is the right place to submit such suggestions.

The LED on the milkv duo could be defined like so:

MilkV Duo cv1800b-milkv-duo.dts:

gpio-leds {
	compatible = "gpio-leds";

	blue_led {
		gpios = <&porta 24 GPIO_ACTIVE_HIGH>;
	};
};

MilkV Duo 256m sg2002-milkv-duo256m.dts: (Not currently in this repo/upstream)

gpio-leds {
	compatible = "gpio-leds";

	blue_led {
		gpios = <&porte 2 GPIO_ACTIVE_HIGH>;
	};
};

The duo256m depends on gpio4 being defined in cv180x.dtsi first:

gpio4: gpio@5021000 {
	compatible = "snps,dw-apb-gpio";
	reg = <0x5021000 0x1000>;
	#address-cells = <1>;
	#size-cells = <0>;
	resets = <&rst RST_GPIO4>;

	porte: gpio-controller@0 {
		compatible = "snps,dw-apb-gpio-port";
		gpio-controller;
		#gpio-cells = <2>;
		ngpios = <32>;
		reg = <0>;
		interrupt-controller;
		#interrupt-cells = <2>;
		interrupts = <SOC_PERIPHERAL_IRQ(48) IRQ_TYPE_LEVEL_HIGH>;
	};
};

gpio pinouts for reference:
https://milkv.io/docs/duo/getting-started/duo#gpio-pinout
https://milkv.io/docs/duo/getting-started/duo256m#gpio-pinout

I personally don't have a cv1800b duo so i can't confirm that it works there, But i can confirm this working on my sg2002 duo.

[inochisa]

See #7, I am opened for a new patch anytime.