From: Marcus Folkesson <marcus.folkesson@gmail.com>
To: Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
Marcus Folkesson <marcus.folkesson@gmail.com>
Subject: [PATCH] iio: dac: ti-dac5571: make vref regulator optional
Date: Fri, 24 Aug 2018 22:24:47 +0200 [thread overview]
Message-ID: <20180824202447.21804-1-marcus.folkesson@gmail.com> (raw)
The `vref` regulator is declared as optional in the device-tree binding,
but the driver does require it.
Go for the device-tree binding and make the `vref` regulator optional.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
drivers/iio/dac/ti-dac5571.c | 30 ++++++++++++++++++++++--------
1 file changed, 22 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c
index f6dcd8bce2b0..bf21cc312096 100644
--- a/drivers/iio/dac/ti-dac5571.c
+++ b/drivers/iio/dac/ti-dac5571.c
@@ -251,6 +251,9 @@ static int dac5571_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
+ if (!data->vref)
+ return -EOPNOTSUPP;
+
ret = regulator_get_voltage(data->vref);
if (ret < 0)
return ret;
@@ -335,13 +338,21 @@ static int dac5571_probe(struct i2c_client *client,
indio_dev->num_channels = spec->num_channels;
data->spec = spec;
- data->vref = devm_regulator_get(dev, "vref");
- if (IS_ERR(data->vref))
- return PTR_ERR(data->vref);
+ data->vref = devm_regulator_get_optional(dev, "vref");
+ if (IS_ERR(data->vref)) {
+ if (PTR_ERR(data->vref) == -ENODEV) {
+ data->vref = NULL;
+ } else {
+ dev_err(dev, "failed to get regulator (%ld)\n",
+ PTR_ERR(data->vref));
+ return PTR_ERR(data->vref);
+ }
- ret = regulator_enable(data->vref);
- if (ret < 0)
- return ret;
+ } else {
+ ret = regulator_enable(data->vref);
+ if (ret)
+ return ret;
+ }
mutex_init(&data->lock);
@@ -373,7 +384,9 @@ static int dac5571_probe(struct i2c_client *client,
return 0;
err:
- regulator_disable(data->vref);
+ if (data->vref)
+ regulator_disable(data->vref);
+
return ret;
}
@@ -383,7 +396,8 @@ static int dac5571_remove(struct i2c_client *i2c)
struct dac5571_data *data = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
- regulator_disable(data->vref);
+ if (data->vref)
+ regulator_disable(data->vref);
return 0;
}
--
2.18.0
next reply other threads:[~2018-08-24 20:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-24 20:24 Marcus Folkesson [this message]
2018-08-25 8:55 ` [PATCH] iio: dac: ti-dac5571: make vref regulator optional Jonathan Cameron
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