topic Re: Android 5.0.2 GPIO in i.MX Processors

Android 5.0.2 GPIO

kamilbystryk — Mon, 02 Nov 2015 10:56:50 GMT

I'm trying set 1 input (GPIO 5.12) and one output (GPIO 1.18) on i.MX6 Solo. What exatly i should set on *.dtsi file, to get GPIO access on sys/class/gpio?

Re: Android 5.0.2 GPIO

CarlosCasillas — Tue, 03 Nov 2015 18:56:16 GMT

Hi Kamil,

You could refer to the following thread, which provides tips regarding GPIO usage on Android:

How do I map Android GPIO to actual i.MX6 hardware pins

Hope this will be useful for you.
Best regards!
/Carlos

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Re: Android 5.0.2 GPIO

kamilbystryk — Wed, 04 Nov 2015 11:00:25 GMT

Hello Carlos,

This link shows how to use defined GPIO. I know how use GPIO when he shows in /sys/class/gpio path, however I don't have idea how configure GPIO in kernel (what in resul give access in class/gpio).

I found some configuration in *.dtsi file, but i don't know how configure specific lines.

Re: Android 5.0.2 GPIO

CarlosCasillas — Tue, 10 Nov 2015 00:06:34 GMT

Hi Kamil,

In this case, you could use as reference the thread below:

DTS tree changes to access GPIO from linux on IMX6SL-EVK Board

Hope this will be useful for you.
Best regards!
/Carlos

Re: Android 5.0.2 GPIO

kamilbystryk — Tue, 10 Nov 2015 11:43:22 GMT

Hello Carlos.

At now, i can correctly add GPIO to filesystem, however i can't use GPIO as output (input works fine).

I define GPIO as:
MX6QDL_PAD_DISP0_DAT18__GPIO5_IO12 0x17059

I think, problem is in 0x17059 definition, but i don't know what is this "magic number"?

Second question - where i can put code to automaticly export and set GPIO at startup?