From: Konrad Dybcio konrad.dybcio@linaro.org
[ Upstream commit 0b24dfa587c6cc7484cfb170da5c7dd73451f670 ]
Sony's downstream driver [1], among some other changes, adds a seemingly random 10ms usleep_range, which turned out to be necessary for the hardware to function properly on at least Sony Xperia 1 IV. Without this, I2C transactions with the SLG51000 straight up fail.
Relax (10-10ms -> 10-11ms) and add the aforementioned sleep to make sure the hardware has some time to wake up.
(nagara-2.0.0-mlc/vendor/semc/hardware/camera-kernel-module/) [1] https://developer.sony.com/file/download/open-source-archive-for-64-0-m-4-29...
Signed-off-by: Konrad Dybcio konrad.dybcio@linaro.org Link: https://lore.kernel.org/r/20221118131035.54874-1-konrad.dybcio@linaro.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/regulator/slg51000-regulator.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/regulator/slg51000-regulator.c b/drivers/regulator/slg51000-regulator.c index 75a941fb3c2b..1b2eee95ad3f 100644 --- a/drivers/regulator/slg51000-regulator.c +++ b/drivers/regulator/slg51000-regulator.c @@ -457,6 +457,8 @@ static int slg51000_i2c_probe(struct i2c_client *client) chip->cs_gpiod = cs_gpiod; }
+ usleep_range(10000, 11000); + i2c_set_clientdata(client, chip); chip->chip_irq = client->irq; chip->dev = dev;