Re: Define LEDs with mixed colors

[Pavel Machek]

Hi!

> I am toying with the idea of writing a multicolor LED GPIO driver. What would be the right way to define mixed color LEDs (for leds-gpio), in device tree or ACPI?
> Consider the following:
> 
> leds {
> 	compatible = "gpio-leds";
> 	led0 {
> 		gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>;
> 		color = <LED_COLOR_ID_RED>;
> 	};
> 
> 	led1 {
> 		gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
> 		color = <LED_COLOR_ID_GREEN>;
> 	};
> 	led2 {
> 		gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW
> 			&mcu_pio 1 GPIO_ACTIVE_LOW>;
> 		color = <LED_COLOR_ID_AMBER>;
> 	};
> };
> 
> This probably won't work as "gpios" seem to be single object in gpio-leds driver code, but what can I do to achieve something similar?
> It is important to define this LED in DT/ACPI in order for the user app to see it in the /sys/class/led folder, without having to write platform-specific driver.
> 

So you have one package with red and green LED, each connected to one
GPIO?

Can you take a look at Documentation/leds/leds-class-multicolor.rst?

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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