Usage of GPIO pins in openwrt22.03
Posted: Thu Feb 23, 2023 9:27 am
In openwrt19.07 it worked to go into /sys/class/gpio and say 'echo “42” >export' to make the respective I/O pin available as a new directory gpio42.
Upgraded now to openwrt22.03. The above does not work anymore.
Still there is export and unexport file handles available, and three directories gpiochip416, 448 and 480.
I added the lines for pinctrl into the vocore2.dts file, no improvement.
I applied the old 0882-pinctrl-fix-gpio-name.patch, no improvement.
I selected in kernel_menuconfig the respective GPIO Support section and there the /sys/class/gpio interface as well as the MT7621 GPIO support in the memory mapped driver area. Still not working.
Any idea what to do?
thank you
Upgraded now to openwrt22.03. The above does not work anymore.
Still there is export and unexport file handles available, and three directories gpiochip416, 448 and 480.
I added the lines for pinctrl into the vocore2.dts file, no improvement.
I applied the old 0882-pinctrl-fix-gpio-name.patch, no improvement.
I selected in kernel_menuconfig the respective GPIO Support section and there the /sys/class/gpio interface as well as the MT7621 GPIO support in the memory mapped driver area. Still not working.
Any idea what to do?
thank you