topic Re: exporting GPIO through SYSFS in i.MX Processors

exporting GPIO through SYSFS

danix — Thu, 29 Oct 2020 08:59:25 GMT

Hey all,

I have been working on my custom board with imx233. During the boared design, I made some imx pins (as GPIO) to control other components on board.

The imx wiki page has all the instruction on how to use GPIOs in the user space on the following link:

http://www.imxdev.org/wiki/index.php?title=FAQ_ALL_BOARDS_GPIO_TEST

But there is no option, or I can't see, in LTIB config that allows to configure SYSFS

I mean I can't see this

Device Drivers --->
      --- GPIO Support
            [*] /sys/class/gpio/... (sysfs interface)

as mentioned in the wiki

so, how do I configure LTIB to export GPIO thru SYSFS?

Re: exporting GPIO through SYSFS

MarianoGoluboff — Mon, 23 May 2011 20:21:48 GMT

Hi Daniel,

I haven't double checked this (I will in a few hours if this doesn't help you), but I believe that's a kernel option. So to change that, in LTIB you'd need to check the box to re-configure the kernel.

Then once LTIB starts building, it'll bring up the kernel menuconfig, and then you'll be able to find this option there.

Mariano

Re: exporting GPIO through SYSFS

fabio_estevam — Tue, 24 May 2011 00:08:46 GMT

Daniel,

Mariano is correct. This is a kernel configuration option.

Regards,

Fabio Estevam

Re: exporting GPIO through SYSFS

danix — Tue, 24 May 2011 07:15:09 GMT

Thank you guys,

Another problem is, LTIB can't download packages either from the GPP or PPP; it always reports "No network connection is available to download.." I tried to edit the proxy in .ltibrc, but didn't help

can you tell me how can I enable LTIB to access the PPP/GPP. I'm using proxy to connect to the Internet

Re: exporting GPIO through SYSFS

MarianoGoluboff — Tue, 24 May 2011 13:18:12 GMT

Hi Daniel,

Did you add these two lines to .ltibrc:

%http_proxy=proxy.server:port

%proxy=1

Mariano

Re: exporting GPIO through SYSFS

danix — Tue, 24 May 2011 13:31:17 GMT

yes I did that, but no effect

Re: exporting GPIO through SYSFS

MarianoGoluboff — Tue, 24 May 2011 18:56:13 GMT

I had the syntax wrong, by the way. Try:

%http_proxy

http://proxy.server:port

%gpp_proxy

If this still doesn't work, post your .ltibrc here. Also, can you ping bitshrine.org? Does network connectivity still fail if you do: ./ltib --dltest