i.MX ProcessorsのトピックRe: Issues about GPIO Status

Issues about GPIO Status

tony_l_cai — Mon, 04 May 2015 07:02:28 GMT

Hi,all

When GPIO is input, the value we cat via userspace is correct.But when GPIO is output, the value we cat is wrong. I want to know how to rectify it in the code. Please help me . 3Q~

Re: Issues about GPIO Status

igorpadykov — Mon, 04 May 2015 07:51:41 GMT

Hi tony

for output GPIO please try to set the SION bit

i.MX6 output gpio value behaviour

Best regards

igor

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Re: Issues about GPIO Status

tony_l_cai — Mon, 04 May 2015 10:23:19 GMT

Hi,igor

Our codebase is base on Linux-3.0.35-2473-gb720655,but ,I cant find the file gpio-mxc.c,and on the other hand,out project didnt use the Device tree.Maybe I also need the method how to set the SION bit in detail. Thanks!

Re: Issues about GPIO Status

igorpadykov — Mon, 04 May 2015 12:23:16 GMT

one can try memtool in unit tests

https://community.freescale.com/message/374610#374610

Best regards

igor