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authorLoic Poulain <loic.poulain@linaro.org>2019-01-30 11:48:07 -0500
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-02-18 11:38:58 -0500
commit1d4c41f3d887bcd66e82cb2fda124533dad8808a (patch)
treec2079cde6f509a33d2f5f09d550d6c00b68970da /drivers
parent6530a5eb99954699743885e800d88be88752d1ab (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/i2c/ov5640.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 2387c29b7fb0..5278c8723fdd 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -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)

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