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regulator: slg51000: Wait after asserting CS pin
[ Upstream commit 0b24dfa587
]
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>
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@ -457,6 +457,8 @@ static int slg51000_i2c_probe(struct i2c_client *client)
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chip->cs_gpiod = cs_gpiod;
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}
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usleep_range(10000, 11000);
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i2c_set_clientdata(client, chip);
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chip->chip_irq = client->irq;
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chip->dev = dev;
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