From: Dragos Bogdan <dragos.bogdan@xxxxxxxxxx>
In order to add full device tree support, add the option of specifying
the vref using the regulator framework.
Signed-off-by: Dragos Bogdan <dragos.bogdan@xxxxxxxxxx>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/staging/iio/impedance-analyzer/ad5933.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 8a920f675b83..ec54ab4471b9 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -97,6 +97,7 @@ struct ad5933_platform_data {
struct ad5933_state {
struct i2c_client *client;
struct regulator *reg;
+ struct regulator *vref;
struct delayed_work work;
struct mutex lock; /* Protect sensor state */
unsigned long mclk_hz;
@@ -721,6 +722,14 @@ static int ad5933_probe(struct i2c_client *client,
}
voltage_uv = regulator_get_voltage(st->reg);
+ st->reg = devm_regulator_get(&client->dev, "vref");
+ if (!IS_ERR(st->vref)) {
+ ret = regulator_enable(st->vref);
+ if (ret)
+ goto error_disable_reg;
+ pdata->vref_mv = regulator_get_voltage(st->vref) / 1000;
+ }
+
if (voltage_uv)
st->vref_mv = voltage_uv / 1000;
else
@@ -747,7 +756,7 @@ static int ad5933_probe(struct i2c_client *client,
ret = ad5933_register_ring_funcs_and_init(indio_dev);
if (ret)
- goto error_disable_reg;
+ goto error_disable_vref;
ret = ad5933_setup(st);
if (ret)
@@ -761,6 +770,8 @@ static int ad5933_probe(struct i2c_client *client,
error_unreg_ring:
iio_kfifo_free(indio_dev->buffer);
+error_disable_vref:
+ regulator_disable(st->vref);
error_disable_reg:
regulator_disable(st->reg);
@@ -775,6 +786,7 @@ static int ad5933_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
iio_kfifo_free(indio_dev->buffer);
regulator_disable(st->reg);
+ regulator_disable(st->vref);
return 0;
}
--
2.17.1
