This is a note to let you know that I've just added the patch titled
Input: drv260x - sleep between polling GO bit
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
input-drv260x-sleep-between-polling-go-bit.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 569e4104a6ffce321ca0b44f7bcb5c522b3a082f
Author: Luca Weiss <luca@xxxxxxxxx>
Date: Mon May 1 17:01:45 2023 -0700
Input: drv260x - sleep between polling GO bit
[ Upstream commit efef661dfa6bf8cbafe4cd6a97433fcef0118967 ]
When doing the initial startup there's no need to poll without any
delay and spam the I2C bus.
Let's sleep 15ms between each attempt, which is the same time as used
in the vendor driver.
Fixes: 7132fe4f5687 ("Input: drv260x - add TI drv260x haptics driver")
Signed-off-by: Luca Weiss <luca@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230430-drv260x-improvements-v1-2-1fb28b4cc698@xxxxxxxxx
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c
index 17eb84ab4c0b7..fe3fbde989be2 100644
--- a/drivers/input/misc/drv260x.c
+++ b/drivers/input/misc/drv260x.c
@@ -443,6 +443,7 @@ static int drv260x_init(struct drv260x_data *haptics)
}
do {
+ usleep_range(15000, 15500);
error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf);
if (error) {
dev_err(&haptics->client->dev,
