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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2017-04-19 09:58:22 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-04-25 07:08:21 -0300
commit3622d3e77ecef090b5111e3c5423313f11711dfa (patch)
tree766d16bfdf2a61b193bd381bec7a2aae6cecbc4c
parent9eb9db3a0f92b75ec710066202e0b2accb45afa9 (diff)
[media] ov2640: print error if devm_*_optional*() failsmedia/v4.12-1
devm_gpiod_get_optional() can return -ENOSYS if GPIOLIB is disabled, causing probe to fail. Warn the user if this happens. Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
-rw-r--r--drivers/media/i2c/ov2640.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/media/i2c/ov2640.c b/drivers/media/i2c/ov2640.c
index 4a2ae24f8722..e6d0c1f64f0b 100644
--- a/drivers/media/i2c/ov2640.c
+++ b/drivers/media/i2c/ov2640.c
@@ -765,17 +765,17 @@ static int ov2640_s_register(struct v4l2_subdev *sd,
static int ov2640_s_power(struct v4l2_subdev *sd, int on)
{
+#ifdef CONFIG_GPIOLIB
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov2640_priv *priv = to_ov2640(client);
-#ifdef CONFIG_GPIOLIB
if (priv->pwdn_gpio)
gpiod_direction_output(priv->pwdn_gpio, !on);
if (on && priv->resetb_gpio) {
/* Active the resetb pin to perform a reset pulse */
gpiod_direction_output(priv->resetb_gpio, 1);
usleep_range(3000, 5000);
- gpiod_direction_output(priv->resetb_gpio, 0);
+ gpiod_set_value(priv->resetb_gpio, 0);
}
#endif
return 0;
@@ -1048,21 +1048,35 @@ static const struct v4l2_subdev_ops ov2640_subdev_ops = {
static int ov2640_probe_dt(struct i2c_client *client,
struct ov2640_priv *priv)
{
+ int ret;
+
/* Request the reset GPIO deasserted */
priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
GPIOD_OUT_LOW);
+
if (!priv->resetb_gpio)
dev_dbg(&client->dev, "resetb gpio is not assigned!\n");
- else if (IS_ERR(priv->resetb_gpio))
- return PTR_ERR(priv->resetb_gpio);
+
+ ret = PTR_ERR_OR_ZERO(priv->resetb_gpio);
+ if (ret && ret != -ENOSYS) {
+ dev_dbg(&client->dev,
+ "Error %d while getting resetb gpio\n", ret);
+ return ret;
+ }
/* Request the power down GPIO asserted */
priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
GPIOD_OUT_HIGH);
+
if (!priv->pwdn_gpio)
dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
- else if (IS_ERR(priv->pwdn_gpio))
- return PTR_ERR(priv->pwdn_gpio);
+
+ ret = PTR_ERR_OR_ZERO(priv->pwdn_gpio);
+ if (ret && ret != -ENOSYS) {
+ dev_dbg(&client->dev,
+ "Error %d while getting pwdn gpio\n", ret);
+ return ret;
+ }
return 0;
}

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