This is a note to let you know that I've just added the patch titled
regulator: slg51000: Wait after asserting CS pin
to the 6.0-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:
regulator-slg51000-wait-after-asserting-cs-pin.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7c9bb18a4a4b2f5082660c8a16089f9cef4206bd
Author: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Date: Fri Nov 18 14:10:35 2022 +0100
regulator: slg51000: Wait after asserting CS pin
[ 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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221118131035.54874-1-konrad.dybcio@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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;
