Add a delay after the OV490 chip is put in reset state. The reset
signal shall be held for at least 250 useconds.
Signed-off-by: Jacopo Mondi <jacopo+rene...@jmondi.org>
---
drivers/media/i2c/rdacm21.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c
index babd14b21252..875bec9f7904 100644
--- a/drivers/media/i2c/rdacm21.c
+++ b/drivers/media/i2c/rdacm21.c
@@ -448,7 +448,10 @@ static int rdacm21_init(struct v4l2_subdev *sd, unsigned
int val)
if (ret)
return ret;
- /* Enable GPIO1 and hold OV490 in reset during max9271 configuration. */
+ /*
+ * Enable GPIO1 and hold OV490 in reset during max9271 configuration.
+ * The reset signal has to be asserted for at least 250 useconds.
+ */
ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT);
if (ret)
return ret;
@@ -456,6 +459,7 @@ static int rdacm21_init(struct v4l2_subdev *sd, unsigned
int val)
ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT);
if (ret)
return ret;
+ usleep_range(250, 500);
ret = max9271_configure_gmsl_link(&dev->serializer);
if (ret)
--
2.30.0
