openwrt/target/linux/brcm2708/patches-4.19/950-0323-media-ov5647-Use-gpiod_set_value_cansleep.patch

From 3be30ee1b3aafd7c6cc45bcea77f25c9613732f4 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 323/806] 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. */
@@ -649,13 +649,13 @@ 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;