Other Parts Discussed in Thread: TCA6408
hi all,
I have used tca6408 in my carrier board with the driver kernel-4.9/drivers/gpio/gpio-pca953x.c.
I use the GPIO Sysfs Interface in userspace and I find a strange phenomenon that I echo gpio-num of P0 to export it,
and echo 'out' to set P0 direction, then other pins' direction are all changed which is not expected!
By the way, the exported gpionum is p0(the base number) , is there any relationship with it?
Thanks