brcm2708: update to latest patches from RPi foundation

[openwrt/staging/wigyori.git] / target / linux / brcm2708 / patches-4.19 / 950-0281-media-ov5647-Use-gpiod_set_value_cansleep.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0281-media-ov5647-Use-gpiod_set_value_cansleep.patch b/target/linux/brcm2708/patches-4.19/950-0281-media-ov5647-Use-gpiod_set_value_cansleep.patch
new file mode 100644 (file)
index 0000000..e88afb0
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0281-media-ov5647-Use-gpiod_set_value_cansleep.patch
@@ -0,0 +1,54 @@
+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] 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;