On 10.07.19 14:03, Florian Eckert wrote: > I have back ported your pcengines-apuv2 device and gpio-amd-fch GPIO > driver to the kernel version 4.19 on OpenWrt. > If I compile and load this without the change no LEDs are visible in > "/sys/class/leds"! Maybe this old kernel just ignored all entries w/o gpio ID. Note that these IDs are deprecated for quite a while and shouldn't be used in new code anymore. > From my point of view the connection between the GPIO and the LEDs > subsystem is missing. > How should the LED subsystem know which GPIO to use? See gpiod_lookup_table. > If I add the change to the pcengines-apuv2 device then the LEDs will be > visilbe under "/sys/class/leds" > and could be used, by OpenWrt userland. > > Mybe I miss something. Your patch is only valid for your backport onto this old kernel, not for recent mainline. --mtx -- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@xxxxxxxxx -- +49-151-27565287
