From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Fri, 17 Jan 2025 14:04:02 +0000 (+0200)
Subject: media: i2c: ov7251: Introduce 1 ms delay between regulators and en GPIO
X-Git-Tag: v5.10.237~220
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0463b05a700bfe15fef0d67bfac187ea043c31cb;p=thirdparty%2Fkernel%2Fstable.git

media: i2c: ov7251: Introduce 1 ms delay between regulators and en GPIO

commit 3d391292cdd53984ec1b9a1f6182a62a62751e03 upstream.

Lift the xshutdown (enable) GPIO 1 ms after enabling the regulators, as
required by the sensor's power-up sequence.

Fixes: d30bb512da3d ("media: Add a driver for the ov7251 camera sensor")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/media/i2c/ov7251.c b/drivers/media/i2c/ov7251.c
index 503a974ee76d5..aab6ea94e5ae3 100644
--- a/drivers/media/i2c/ov7251.c
+++ b/drivers/media/i2c/ov7251.c
@@ -748,6 +748,8 @@ static int ov7251_set_power_on(struct ov7251 *ov7251)
 		return ret;
 	}
 
+	usleep_range(1000, 1100);
+
 	gpiod_set_value_cansleep(ov7251->enable_gpio, 1);
 
 	/* wait at least 65536 external clock cycles */