On Fri, 2017-09-01 at 09:12 +0800, Lai Eddy wrote: > I have just build and run Yocto(Pyro 2.3.1) Linux on my Xeon D1500 > board, > I want to use the SOC's GPIO pins for a push button, so I use > "bitbake linux-yocto -c menuconfig" to enable the > "Device Drivers"-->"GPIO Support"-->"sysfs interface", and also > enable the "Intel ICH GPIO" > after the kernel boot on the board, there's a gpiochip available: > # cd /sys/class/gpio/ > # ls > export gpiochip436 unexport > # more gpiochip436/ngpio > 76 > but I got an error when I issue the command to export GPIO#1 > # echo 436 > export > -sh: echo: write error: No such device or address > # echo 437 > export > -sh: echo: write error: No such device or address > > is there kernel miss configured or something wrong on the operation? > Can you also verify with the output of dmesg that the gpio device is initialized?
Sau! > Eddy Lai -- _______________________________________________ meta-intel mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-intel
