gpio: xilinx: Not read output values via regs
Reading registers for finding out output value is not working because input value is read instead in case of tristate. Reported-by: NStefan Herbrechtsmeier <stefan@herbrechtsmeier.net> Signed-off-by: NMichal Simek <michal.simek@xilinx.com> Reviewed-by: NStefan Herbrechtsmeier <stefan@herbrechtsmeier.net>
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