diff options
| author | Jacopo Mondi <jacopo+renesas@jmondi.org> | 2021-06-16 14:46:09 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-06-17 11:30:38 +0200 |
| commit | 7028772092b7f2fc50de7f00aa0817505b3b11f7 (patch) | |
| tree | cbce08aeb5e76e301847126c11fcfee451146f2a /drivers | |
| parent | 9e0bf8393d0602cc7fda749b77cf8ec7f81249cb (diff) | |
| download | linux-7028772092b7f2fc50de7f00aa0817505b3b11f7.tar.bz2 | |
media: i2c: rdacm21: Add delay after OV490 reset
Add a delay after the OV490 chip is put in reset state. The reset
signal shall be held low for at least 250 useconds.
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/i2c/rdacm21.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c index 67ed1e5c450d..336fd5d482b7 100644 --- a/drivers/media/i2c/rdacm21.c +++ b/drivers/media/i2c/rdacm21.c @@ -469,7 +469,10 @@ static int rdacm21_initialize(struct rdacm21_device *dev) 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; @@ -477,6 +480,7 @@ static int rdacm21_initialize(struct rdacm21_device *dev) 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) |