1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0178-media-ov5647-Use-gpiod_set_value_cansleep.patch b/target/linux/bcm27xx/patches-5.4/950-0178-media-ov5647-Use-gpiod_set_value_cansleep.patch
new file mode 100644
index 0000000000..d141349f98
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0178-media-ov5647-Use-gpiod_set_value_cansleep.patch
@@ -0,0 +1,54 @@
+From fa219a511fe98237d5126d1e2b5181df5070a179 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 18 Sep 2018 11:08:51 +0100
+Subject: [PATCH] media: ov5647: Use gpiod_set_value_cansleep
+
+All calls to the gpio library are in contexts that can sleep,
+therefore there is no issue with having those GPIOs controlled
+by controllers which require sleeping (eg I2C GPIO expanders).
+
+Switch to using gpiod_set_value_cansleep instead of gpiod_set_value
+to avoid triggering the warning in gpiolib should the GPIO
+controller need to sleep.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/media/i2c/ov5647.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+--- a/drivers/media/i2c/ov5647.c
++++ b/drivers/media/i2c/ov5647.c
+@@ -373,7 +373,7 @@ static int ov5647_sensor_power(struct v4
+ 		dev_dbg(&client->dev, "OV5647 power on\n");
+ 
+ 		if (ov5647->pwdn) {
+-			gpiod_set_value(ov5647->pwdn, 0);
++			gpiod_set_value_cansleep(ov5647->pwdn, 0);
+ 			msleep(PWDN_ACTIVE_DELAY_MS);
+ 		}
+ 
+@@ -415,7 +415,7 @@ static int ov5647_sensor_power(struct v4
+ 
+ 		clk_disable_unprepare(ov5647->xclk);
+ 
+-		gpiod_set_value(ov5647->pwdn, 1);
++		gpiod_set_value_cansleep(ov5647->pwdn, 1);
+ 	}
+ 
+ 	/* Update the power count. */
+@@ -648,13 +648,13 @@ static int ov5647_probe(struct i2c_clien
+ 		goto mutex_remove;
+ 
+ 	if (sensor->pwdn) {
+-		gpiod_set_value(sensor->pwdn, 0);
++		gpiod_set_value_cansleep(sensor->pwdn, 0);
+ 		msleep(PWDN_ACTIVE_DELAY_MS);
+ 	}
+ 
+ 	ret = ov5647_detect(sd);
+ 
+-	gpiod_set_value(sensor->pwdn, 1);
++	gpiod_set_value_cansleep(sensor->pwdn, 1);
+ 
+ 	if (ret < 0)
+ 		goto error;