Commit be8fc023 authored by David Collins's avatar David Collins Committed by Dmitry Torokhov
Browse files

Input: pm8941-pwrkey - simulate missed key press events 



The status of the keys connected to the KPDPWR_N and RESIN_N pins
is identified by reading corresponding bits in the interrupt real
time status register.  If the status has changed by the time that
the interrupt is handled then a press event will be missed.

Maintain a last known status variable to find unbalanced release
events and simulate press events for each accordingly.

Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
Signed-off-by: default avatarAnjelique Melendez <quic_amelende@quicinc.com>
Link: https://lore.kernel.org/r/20220422191239.6271-6-quic_amelende@quicinc.com


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 0b65118e

drivers/input/misc/pm8941-pwrkey.c

+11 −0
Original line number Diff line number Diff line
@@ -77,6 +77,7 @@ struct pm8941_pwrkey { 
	u32 code;

	u32 sw_debounce_time_us;

	ktime_t sw_debounce_end_time;

	bool last_status;

	const struct pm8941_data *data;

};
@@ -167,6 +168,16 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data) 
		pwrkey->sw_debounce_end_time = ktime_add_us(ktime_get(),

						pwrkey->sw_debounce_time_us);



	/*

	 * Simulate a press event in case a release event occurred without a

	 * corresponding press event.

	 */

	if (!pwrkey->last_status && !sts) {

		input_report_key(pwrkey->input, pwrkey->code, 1);

		input_sync(pwrkey->input);

	}

	pwrkey->last_status = sts;



	input_report_key(pwrkey->input, pwrkey->code, sts);

	input_sync(pwrkey->input);