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input: misc: 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.

Change-Id: I180469a7048a40e490f21d0f8b9504136131e75b
Signed-off-by: David Collins <collinsd@codeaurora.org>
This commit is contained in:
David Collins 2021-01-28 15:06:11 -08:00 committed by David Collins
parent 90e0e5b9ed
commit 04809156b5
1 changed files with 11 additions and 0 deletions
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11
drivers/input/misc/pm8941-pwrkey.c
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@ -78,6 +78,7 @@ struct pm8941_pwrkey {
u32 code;
u32 sw_debounce_time_us;
ktime_t last_release_time;
bool last_status;
const struct pm8941_data *data;
};
@ -170,6 +171,16 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data)
if (pwrkey->sw_debounce_time_us && !sts)
pwrkey->last_release_time = ktime_get();
/*
* 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);