target/linux/brcm2708/patches-4.14/950-0419-media-ov5647-Use-gpiod_set_value_cansleep.patch

   1 From 185076ab6bc5dd83f2da62552fbb79a53d36314d Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 18 Sep 2018 11:08:51 +0100
   4 Subject: [PATCH 419/454] media: ov5647: Use gpiod_set_value_cansleep
   5
   6 All calls to the gpio library are in contexts that can sleep,
   7 therefore there is no issue with having those GPIOs controlled
   8 by controllers which require sleeping (eg I2C GPIO expanders).
   9
  10 Switch to using gpiod_set_value_cansleep instead of gpiod_set_value
  11 to avoid triggering the warning in gpiolib should the GPIO
  12 controller need to sleep.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  15 ---
  16  drivers/media/i2c/ov5647.c | 8 ++++----
  17  1 file changed, 4 insertions(+), 4 deletions(-)
  18
  19 --- a/drivers/media/i2c/ov5647.c
  20 +++ b/drivers/media/i2c/ov5647.c
  21 @@ -348,7 +348,7 @@ static int ov5647_sensor_power(struct v4
  22                 dev_dbg(&client->dev, "OV5647 power on\n");
  23
  24                 if (ov5647->pwdn) {
  25 -                       gpiod_set_value(ov5647->pwdn, 0);
  26 +                       gpiod_set_value_cansleep(ov5647->pwdn, 0);
  27                         msleep(PWDN_ACTIVE_DELAY_MS);
  28                 }
  29
  30 @@ -390,7 +390,7 @@ static int ov5647_sensor_power(struct v4
  31
  32                 clk_disable_unprepare(ov5647->xclk);
  33
  34 -               gpiod_set_value(ov5647->pwdn, 1);
  35 +               gpiod_set_value_cansleep(ov5647->pwdn, 1);
  36         }
  37
  38         /* Update the power count. */
  39 @@ -624,13 +624,13 @@ static int ov5647_probe(struct i2c_clien
  40                 goto mutex_remove;
  41
  42         if (sensor->pwdn) {
  43 -               gpiod_set_value(sensor->pwdn, 0);
  44 +               gpiod_set_value_cansleep(sensor->pwdn, 0);
  45                 msleep(PWDN_ACTIVE_DELAY_MS);
  46         }
  47
  48         ret = ov5647_detect(sd);
  49
  50 -       gpiod_set_value(sensor->pwdn, 1);
  51 +       gpiod_set_value_cansleep(sensor->pwdn, 1);
  52
  53         if (ret < 0)
  54                 goto error;