We had managed to get Wake-on-LAN working on
toradex_tk1_l4t_r21.5-next back in Feb 2017. But recently on BSP v2.7.4 it’s broken again. Putting the TK1 into LP1, we were able to wake up using GPIO or clock but not LAN.
dmesg for something related we see this.
[ 6.561797] of_get_named_gpio_flags exited with status 235 [ 6.561819] of_get_named_gpio_flags exited with status 117 [ 6.561886] gpio wake14 for gpio=235 [ 6.567325] _gpio_request: gpio-117 (WOL_GPIO) status -16 [ 6.567337] gpio-keys gpio-keys.3: Failed to request GPIO 117, error -16 [ 6.575897] gpio-keys: probe of gpio-keys.3 failed with error -16
We looked at the kernel tree to see if I could figure out what was broken.
This commit seemed to touch the Ethernet code. One thing we noticed is that
gpio_request(LAN_WAKE_N, "LAN_WAKE_N"); is done, but there doesn’t seem to be a equivalent