Issues about GPIO Status

[tony_l_cai]

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~

[igorpadykov]

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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[tony_l_cai]

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!

[igorpadykov]

one can try memtool in unit tests

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

Best regards

igor