diff options
| author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-04-19 09:58:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-04-25 07:08:21 -0300 |
| commit | 3622d3e77ecef090b5111e3c5423313f11711dfa (patch) | |
| tree | 766d16bfdf2a61b193bd381bec7a2aae6cecbc4c /drivers/media | |
| parent | 9eb9db3a0f92b75ec710066202e0b2accb45afa9 (diff) | |
| download | linux-3622d3e77ecef090b5111e3c5423313f11711dfa.tar.bz2 | |
[media] ov2640: print error if devm_*_optional*() fails
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>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/ov2640.c | 26 |
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; } |