Commit 70287720 authored by Jacopo Mondi's avatar Jacopo Mondi Committed by Mauro Carvalho Chehab
Browse files

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: default avatarJacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: default avatarKieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 9e0bf839

drivers/media/i2c/rdacm21.c

+5 −1
Original line number Diff line number Diff line
@@ -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)