Hi Tomas, On Wed, Aug 28, 2024 at 10:09 AM Tomas Paukrt <[email protected]> wrote: > > The PSR register works correctly for GPIO pins in input mode, > but always returns 0 for GPIO pins in output mode unless the SION > bit is set. > > The DR register should be used for GPIO pins in output mode > to allow correct getting of previously set output value. > > Please note that the Linux gpio-mxc driver and the NXP U-Boot mxc_gpio > driver already use the DR register for all GPIO pins in output mode: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=442b2494b17d1a4f0a14721580271eb23ebffd42
Yes, it makes sense to align the i.MX GPIO behavior with the Linux driver, thanks: Reviewed-by: Fabio Estevam <[email protected]> Tested-by: Fabio Estevam <[email protected]>
