The green state LED is not working

[3PO]

Usually the green onboard LED should show the SD card activity, but with this distro the LED is allways off.

This is the issue from gentoo-on-rpi3-64bit:

pi64 ~ # ls -r /sys/class/leds/*
ls: cannot access '/sys/class/leds/*': No such file or directory
pi64 ~ #

And this is from raspian:

raspberrypi ~ # ls -r /sys/class/leds/*
/sys/class/leds/led1:
uevent  trigger  subsystem  power  max_brightness  device  brightness  ..  .

/sys/class/leds/led0:
uevent  trigger  subsystem  power  max_brightness  device  brightness  ..  .
raspberrypi ~ #

[3PO]

The problem still exists in the new version 1.2.0.

[sakaki-]

Needs CONFIG_BCM_VCIO and CONFIG_GPIO_BCM_EXP available and set in the kernel (see e.g. bamarni/pi64#6); this was added in the 4.11.y branch (raspberrypi/linux@3bd4441), but the currently shipped kernel with the image is 4.10.y (or 4.9.y) for vc4 accelerated video driver support / stability. Will have a look at booting 4.15 sometime soon though, now 1.2.0 release is out.

[yrabbit]

It indeed does work with newer kernels.

rabbit@pi64 ~/kbuild/linux % uname -a
Linux pi64 4.16.0-rc2-v8+ #1 SMP PREEMPT Mon Feb 26 07:25:48 GMT 2018 aarch64 GNU/Linux
ROOT@pi64 ~ # ls -r /sys/class/leds/*
/sys/class/leds/led1@  /sys/class/leds/led0@

[sakaki-]

I have the 4.14.y in testing atm, and will make this the default kernel for the image shortly. This does have CONFIG_BCM_VCIO and CONFIG_GPIO_BCM_EXP defined in bcmrpi3_defconfig, so the LED should work.

[sakaki-]

I've unmasked 4.14* now, if you emaint sync --repo rpi and then update bcmrpi3-kernel-bin and reboot, you should have a working green LED ^-^

[sakaki-]

v1.2.1 is out now - supports the RPi3 B+ (as well as B), uses kernel 4.14, and... the green LED finally blinks ^-^

[yrabbit]

Very good :)