lkml.org 
[lkml]   [2022]   [Jan]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/3] input: misc: pm8941-pwrkey: simulate missed key press events
Date
From: David Collins <collinsd@codeaurora.org>

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>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
---
drivers/input/misc/pm8941-pwrkey.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
index b912ce00ce1c..0ce00736e695 100644
--- a/drivers/input/misc/pm8941-pwrkey.c
+++ b/drivers/input/misc/pm8941-pwrkey.c
@@ -77,6 +77,7 @@ struct pm8941_pwrkey {
u32 code;
u32 sw_debounce_time_us;
ktime_t last_release_time;
+ bool last_status;
const struct pm8941_data *data;
};

@@ -166,6 +167,16 @@ 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);

--
2.34.1
\
 
 \ /
  Last update: 2022-01-20 21:45    [W:0.113 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site