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media: i2c: rdacm21: Add delay after OV490 reset

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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>
This commit is contained in:
Jacopo Mondi 2021-06-16 14:46:09 +02:00 committed by Mauro Carvalho Chehab
parent 9e0bf8393d
commit 7028772092
1 changed files with 5 additions and 1 deletions
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6
drivers/media/i2c/rdacm21.c
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@ -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)