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My board used E3845 and I wanted to use some GPIO Pin to do something important.
I download the linux-stable kernel as the document tizen-ivi-m2-kernel-ltsi-linux-support-package-atom-e3800-gsg.pdf described. Made and updated the linux kernel.
There is the information when the system started and printed:
io scheduler cfq registered (default)
gpiochip_find_base: found new base at 154
gpiochip_add: registered GPIOs 154 to 255 on device: byt_gpio.0
gpiochip_find_base: found new base at 126
gpiochip_add: registered GPIOs 126 to 153 on device: byt_gpio.1
gpiochip_find_base: found new base at 82
gpiochip_add: registered GPIOs 82 to 125 on device: byt_gpio.2
byt_gpio byt_gpio.2: GPIO interrupt error, pins misconfigured
byt_gpio byt_gpio.2: Gpio 27 interrupt flood, disabling
[root@localhost ~]# cd /sys/class/gpio/
[root@localhost gpio]# ls -l
total 0
--w-------. 1 root root 4096 Jul 3 16:21 export
lrwxrwxrwx. 1 root root 0 Jul 3 16:21 gpiochip126 -> ../../devices/platform/byt_gpio.1/gpio/gpiochip126
lrwxrwxrwx. 1 root root 0 Jul 3 16:21 gpiochip154 -> ../../devices/platform/byt_gpio.0/gpio/gpiochip154
lrwxrwxrwx. 1 root root 0 Jul 3 16:21 gpiochip82 -> ../../devices/platform/byt_gpio.2/gpio/gpiochip82
--w-------. 1 root root 4096 Jul 3 16:21 unexport
[root@localhost usb]# uname -a
Linux localhost.localdomain 3.10.28-03142014-ltsi+ # 1 SMP Sun Jul 2 21:38:05 PDT 2017 x86_64 x86_64 x86_64 GNU/Linux-----The kernel Information.
I wonder whether I should do some configure work for the BYT Pinctrl for GPIO in the BIOS.
Can you tell me what I should do in the BIOS? And How to use the BYT Pinctrl for GPIO in the linux kernel?
Thank you.
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- 5G
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Hello suipingli,
Thank you for contacting Intel Communities.
I recommend you to open a new thread in the https://embedded.communities.intel.com/community/en Embedded Community.
Best Regards,
Juan V.
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