I want to make work mt7622 soc’s ethernet controller and faced with this issue. I’ve compiled mtk_soc_eth
driver as mkt_eth
module and I have an entry in mt7622-bananapi-bpi-r64.dts
device tree for device, compatible with driver.
During boot this module is loaded into system automatically (I think after mounting rootfs):
[root@nixos:~]# lsmod | grep mtk_eth
mtk_eth 69632 0
dsa_core 98304 1 mtk_eth
And it seems registered as platform driver:
[root@nixos:~]# ls /sys/bus/platform/drivers/mtk_soc_eth
bind module uevent unbind
Also after boot I have an platform device:
[root@nixos:~]# ls /sys/bus/platform/devices/1b100000.ethernet
driver_override
modalias
of_node
power
subsystem
supplier:platform:10006000.power-controller
supplier:platform:10209000.apmixedsys
supplier:platform:10210000.topckgen
supplier:platform:10211000.pinctrl
supplier:platform:1b000000.syscon
supplier:platform:1b128000.sgmiisys
uevent
waiting_for_supplier
However they are not binded for some reason. Moreover, when I try to bind them manually, I get an error:
[root@nixos:~]# echo '1b100000.ethernet' > /sys/bus/platform/drivers/mtk_soc_eth/bind
-bash: echo: write error: Resource temporarily unavailable
How can I understand why ethernet device doesn’t bind with driver?