pinctrl: intel: Fix a glitch when updating IRQ flags on a preconfigured line

The commit af7e3eeb84e2 ("pinctrl: intel: Disable input and output buffer
when switching to GPIO") hadn't taken into account an update of the IRQ
flags scenario.

When updating the IRQ flags on the preconfigured line the ->irq_set_type()
is called again. In such case the sequential Rx buffer configuration
changes may trigger a falling or rising edge interrupt that may lead,
on some platforms, to an undesired event.

This may happen because each of intel_gpio_set_gpio_mode() and
__intel_gpio_set_direction() updates the pad configuration with a different
value of the GPIORXDIS bit. Notable, that the intel_gpio_set_gpio_mode() is
called only for the pads that are configured as an input. Due to this fact,
integrate the logic of __intel_gpio_set_direction() call into the
intel_gpio_set_gpio_mode() so that the Rx buffer won't be disabled and
immediately re-enabled.

Fixes: af7e3eeb84e2 ("pinctrl: intel: Disable input and output buffer when switching to GPIO")
Reported-by: Kane Chen <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Tested-by: Grace Kao <[email protected]>

0 files changed, 0 insertions, 0 deletions