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authorJohn Keeping <john@metanate.com>2021-10-06 11:06:03 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-11-18 19:17:01 +0100
commitd36d2c35fd98259de4b4f44d877365369eb19534 (patch)
tree55d4d69eca3b4136d6809a6b3473e77a971b69d0 /drivers/input
parentd268e0125c929eca42f1ea1db79bf23c73894231 (diff)
Input: st1232 - increase "wait ready" timeout
[ Upstream commit 2667f6b7af99e81958fa97c03bb519fcb09d0055 ] I have a ST1633 touch controller which fails to probe due to a timeout waiting for the controller to become ready. Increasing the minimum delay to 100ms ensures that the probe sequence completes successfully. The ST1633 datasheet says nothing about the maximum delay here and the ST1232 I2C protocol document says "wait until" with no notion of a timeout. Since this only runs once during probe, being generous with the timout seems reasonable and most likely the device will become ready eventually. (It may be worth noting that I saw this issue with a PREEMPT_RT patched kernel which probably has tighter wakeups from usleep_range() than other preemption models.) Fixes: f605be6a57b4 ("Input: st1232 - wait until device is ready before reading resolution") Signed-off-by: John Keeping <john@metanate.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20210929152609.2421483-1-john@metanate.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/st1232.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c
index 6abae665ca71..9d1dea6996a2 100644
--- a/drivers/input/touchscreen/st1232.c
+++ b/drivers/input/touchscreen/st1232.c
@@ -92,7 +92,7 @@ static int st1232_ts_wait_ready(struct st1232_ts_data *ts)
unsigned int retries;
int error;
- for (retries = 10; retries; retries--) {
+ for (retries = 100; retries; retries--) {
error = st1232_ts_read_data(ts, REG_STATUS, 1);
if (!error) {
switch (ts->read_buf[0]) {