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FW 13 AMD 7040 series (Lotus Azalea): Power Button RGB Control #101
Description
Hi!
I've recently taken a look at https://github.com/FrameworkComputer/Framework-Laptop-13/tree/main/Fingerprint%20Reader, the documentation for the fingerprint reader module, and discovered that there are 2 more color pins: FPR_LED_G and FPR_LED_R. According to https://github.com/FrameworkComputer/Framework-Laptop-13/blob/main/Mainboard/Mainboard_Interfaces_Schematic_7040_Series.pdf, those pins are wired into the board as the W pin is, so it should be possible to control them from the EC. However, looking at the current implementation for the 7040 series firmware, this doesn't seem to be implemented anywhere.
power_led: power-led {
led-id = "EC_LED_ID_POWER_LED";
led-pwms = <&pwm_power_w>;
color_power_off: color-power-off {
led-color = "LED_OFF";
led-values = <0>;
};
color_power_white: color-power-white {
led-color = "LED_WHITE";
br-color = "EC_LED_COLOR_WHITE";
led-values = <55>;
};
};
Only the white pin is set up for zephyr, the other 2 are not mentioned anywhere. The EC itself also only talks to this pin.
Would it be possible to add the other 2 pins into the firmware as well, just exposing them to the EC command bus? I think this would allow for a great deal of tinkering with the power button, for example changing the color when the battery is low or some error occurred.
Thanks!
Activity
DHowett commentedon Nov 9, 2026
Alas, no. The fingerprint module only supported the red, green and amber LEDs when it first came out.
It has been simplified since then, and as far as anybody can determine those traces are not connected to either the EC or the fingerprint module.
If you have an old 11th gen machine, you will be able to get colors out of it. Nothing newer though.
marlenemeows commentedon Nov 9, 2026
Adding to this; this seems to be implemented on the Intel side of things:
EmbeddedController/board/hx30/led.c
Lines 96 to 103 in f6620a8
This has been used for pretty neat things by the community in the past and I would also love if this was supported on the AMD variants as well.
I unfortunately don't know anything about embedded and/or hardware development, and am scared of bricking my laptop, else I'd try to implement this myself.
marlenemeows commentedon Nov 9, 2026
@DHowett aw, just saw your comment right after posting mine. That sucks, especially considering how neat this would be. Board schematics do suggest that the EC is still connected to the traces, but I'm not an expert, nor do I have access to the full schematics, so I can't really tell.
Would be neat to at least get feedback from Framework at least.