staging: iio: ad5933: change regulator binging for vref

Set a single voltage regulator for all voltage references.
Remove voltage reference value from default platafrom data struct.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Gabriel Capella <gabriel@capella.pro>
Co-developed-by: Gabriel Capella <gabriel@capella.pro>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 9e52384..730bc39 100644 (file)
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -91,7 +91,6 @@
 
 struct ad5933_platform_data {
        unsigned long                   ext_clk_hz;
-       unsigned short                  vref_mv;
 };
 
 struct ad5933_state {
@@ -113,7 +112,6 @@ struct ad5933_state {
 };
 
 static struct ad5933_platform_data ad5933_default_pdata  = {
-       .vref_mv = 3300,
 };
 
 #define AD5933_CHANNEL(_type, _extend_name, _info_mask_separate, _address, \
@@ -691,7 +689,7 @@ static void ad5933_work(struct work_struct *work)
 static int ad5933_probe(struct i2c_client *client,
                        const struct i2c_device_id *id)
 {
-       int ret, voltage_uv = 0;
+       int ret;
        struct ad5933_platform_data *pdata = dev_get_platdata(&client->dev);
        struct ad5933_state *st;
        struct iio_dev *indio_dev;
@@ -718,12 +716,12 @@ static int ad5933_probe(struct i2c_client *client,
                dev_err(&client->dev, "Failed to enable specified VDD supply\n");
                return ret;
        }
-       voltage_uv = regulator_get_voltage(st->reg);
+       ret = regulator_get_voltage(st->reg);
+
+       if (ret < 0)
+               goto error_disable_reg;
 
-       if (voltage_uv)
-               st->vref_mv = voltage_uv / 1000;
-       else
-               st->vref_mv = pdata->vref_mv;
+       st->vref_mv = ret / 1000;
 
        if (pdata->ext_clk_hz) {
                st->mclk_hz = pdata->ext_clk_hz;