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Subject: media: i2c: rdacm21: Add delay after OV490 reset Author: Jacopo Mondi <[email protected]> Date: Wed Jun 16 14:46:09 2021 +0200 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 <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Reviewed-by: Kieran Bingham <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> 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 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) _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
