Is the green STATUS "ACT" LED (D5) accessible on an RPi 4B ?

[colinh]

ie. Can it be switched on/off using a GPIO pin? If so, which one?

I can't tell from the *reduced* schematic


It used to be on GPIO_16 (STATUS_LED_N) on the original RPi.

[colinh]

OK, so I'm learning about device-trees...

Code: Select all

$ dtc -O dts bcm2711-rpi-4-b.dtb 

gives

Code: Select all

...
    leds {
        compatible = "gpio-leds";
        phandle = <0xe3>;

        led-act {
            label = "led0";
            default-state = "keep";
            linux,default-trigger = "mmc0";
            gpios = <0x07 0x2a 0x00>;
            phandle = <0x42>;
        };
...

So, I'll try 0x2a (ie. 42)...

[aBUGSworstnightmare]

OK, so I'm learning about device-trees...

Code: Select all

$ dtc -O dts bcm2711-rpi-4-b.dtb 

gives

Code: Select all

...
    leds {
        compatible = "gpio-leds";
        phandle = <0xe3>;

        led-act {
            label = "led0";
            default-state = "keep";
            linux,default-trigger = "mmc0";
            gpios = <0x07 0x2a 0x00>;
            phandle = <0x42>;
        };
...

So, I'll try 0x2a (ie. 42)...

... why not simply look at the source file
https://github.com/raspberrypi/linux/bl ... -b.dts#L16 and https://github.com/raspberrypi/linux/bl ... b.dts#L523