Input: snvs_pwrkey - add press event reporting to avoid event loss during suspend

The driver implements debounce protection using a timer-based mechanism:
when a key interrupt occurs, a timer is scheduled to verify the key state
after DEBOUNCE_TIME before reporting the event. This works well during
normal operation.

However, key press events can be lost during system resume on platforms
like i.MX8MQ-EVK because:
1. During the no_irq resume phase, PCIe driver restoration can take up to
200ms with IRQs disabled.
2. The power key interrupt remains pending during the no_irq phase.
3. If the key is released before IRQs are re-enabled, the timer eventually
runs but sees the key as released and skips reporting the event.

To prevent event loss during system suspend, set a pending_press flag in
the interrupt handler and report the press event from the timer callback
when the flag is set. This avoids out-of-order event delivery and keeps
the existing timer-based debounce mechanism for normal operation.

Signed-off-by: Joy Zou <joy.zou@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260715-b4-pwrkey-v5-4-07e7353c319e@oss.nxp.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

0 files changed, 0 insertions, 0 deletions