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media: i2c: ov5640: Fix post-reset delay 

According to the ov5640 specification (2.7 power up sequence), host can
access the sensor's registers 20ms after reset. Trying to access them
before leads to undefined behavior and result in sporadic initialization
errors.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Loic Poulain 2019-01-30 11:48:07 -05:00 committed by Mauro Carvalho Chehab
parent 6530a5eb99
commit 1d4c41f3d8
1 changed files with 1 additions and 1 deletions
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2
drivers/media/i2c/ov5640.c
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@ -1939,7 +1939,7 @@ static void ov5640_reset(struct ov5640_dev *sensor)
usleep_range(1000, 2000);
gpiod_set_value_cansleep(sensor->reset_gpio, 0);
usleep_range(5000, 10000);
usleep_range(20000, 25000);
}
static int ov5640_set_power_on(struct ov5640_dev *sensor)