Re: [PATCH] mxc_gpio: on imx8m read the DR instead of the PSR

Hi Angus,

On Sun, Nov 28, 2021 at 11:52 AM Angus Ainslie angus@akkea.ca wrote:

On imx8m it is more correct to read the data register than the pad status register.

In output mode the pad status register does not contain the value being output so we must read the DR for the value.

In input mode the DR will contain the same value as the PSR when the pad mode is GPIO.

If the pad mode is not GPIO and the pin is an input then 0 is always returned.

Have you tried setting the SION bit of the pad?