Commit e86a57ec authored by Loic Poulain's avatar Loic Poulain Committed by Greg Kroah-Hartman
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media: i2c: ov5640: Fix post-reset delay 



commit 1d4c41f3 upstream.

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: default avatarLoic Poulain <loic.poulain@linaro.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Adam Ford <aford173@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5f9614d0

drivers/media/i2c/ov5640.c

+1 −1
Original line number Diff line number Diff line
@@ -1759,7 +1759,7 @@ 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)