topic GPIO as node in i.MX Processors

GPIO as node

mathew_k_t — Tue, 13 Feb 2018 11:09:52 GMT

I would like configure GPIO(GPIO1_IO31) as an interrupt to toggle value of another GPIO (GPIO1_IO30). How to implement this?

How to create a node in dts file for gpio?

Re: GPIO as node

igorpadykov — Tue, 13 Feb 2018 22:51:29 GMT

Hi mathew_k_t

please look at linux/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt

linux-imx.git - i.MX Linux Kernel

and some examples

https://community.nxp.com/thread/381277

Best regards
igor
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Re: GPIO as node

mathew_k_t — Thu, 15 Feb 2018 04:34:34 GMT

Thank you for your response.

I have gone through the references and I understood the things discussed. But I was expecting something helpful to configure one gpio pin as interrupt. As per the first reference, I tried to create a node in imx6ull14x14evk.dts, but I'm not getting any irq_reference when I added some print statements in gpio-mxc.c.