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Input: pm8941-pwrkey - simulate missed key press events

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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: David Collins <collinsd@codeaurora.org>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Link: https://lore.kernel.org/r/20220422191239.6271-6-quic_amelende@quicinc.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
David Collins 2022-04-24 18:21:58 -07:00 committed by Dmitry Torokhov
parent 0b65118e6b
commit be8fc023ef
1 changed files with 11 additions and 0 deletions
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11
drivers/input/misc/pm8941-pwrkey.c
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@ -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);