Re: [meta-intel] Xeon D1500 GPIO userspace access write error: No such device or address

[Wold, Saul]

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
> exportgpiochip436  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
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[meta-intel] Xeon D1500 GPIO userspace access write error: No such device or address

[Lai Eddy]

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?

Eddy Lai
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