topic Re: use GPIO in imx6ul in i.MX Processors

use GPIO in imx6ul

adi1525 — Fri, 23 Nov 2018 14:00:24 GMT

Hello, this is simple question. I want use GPIO1_7 so if I only must set configuration in device tree ? because I can sets /sys/class/gpio75 (GPIO3_IO11), but there is no any information about this pin in my device tree.

Can I take my ready *.dtsi file and add GPIO1_07 support without build all image ? I use bitbake.

Regards,

Adrian

Re: use GPIO in imx6ul

igorpadykov — Fri, 23 Nov 2018 23:33:26 GMT

Hi Adrian

one can look at description of this case on

Simple GPIO Example - quandry

Best regards
igor
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Re: use GPIO in imx6ul

adi1525 — Mon, 26 Nov 2018 09:52:49 GMT

Thanks Igor, I can now set device tree and it works, but in my board cc imx6ul SBS express there is User led on pin GPIO3_IO11 and it configuration should be in imx6ul-ccimx6ulstarter .dtsi/.dts but there is no any code about it. so there is another place where I can define this ?

Regards

Adrian

Re: use GPIO in imx6ul

igorpadykov — Mon, 26 Nov 2018 10:02:49 GMT

Hi Adrian

you can add some configuration for this pin in uboot.

Best regards
igor

Re: use GPIO in imx6ul

adi1525 — Mon, 26 Nov 2018 10:53:31 GMT

But If I make this with u-boot will it not be overridden by the kernel ?

Regards

Adrian

Re: use GPIO in imx6ul

adi1525 — Mon, 26 Nov 2018 12:07:06 GMT

Ok I see, thanks Igor and I try it again :smileywink:

Regards

Adrian