On 02/16/2014 01:02 PM, Hartmut Knaack wrote:
Switch the ad799x driver to use the regulator framework and add binding for reference voltage.
Signed-off-by: Hartmut Knaack <knaack.h@xxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
diff --git a/drivers/staging/iio/adc/ad799x.h b/drivers/staging/iio/adc/ad799x.h
index a591aa6..fc8c852 100644
--- a/drivers/staging/iio/adc/ad799x.h
+++ b/drivers/staging/iio/adc/ad799x.h
@@ -95,7 +95,7 @@ struct ad799x_state {
struct i2c_client *client;
const struct ad799x_chip_info *chip_info;
struct regulator *reg;
- u16 int_vref_mv;
+ struct regulator *vref;
unsigned id;
u16 config;
@@ -103,14 +103,6 @@ struct ad799x_state {
unsigned int transfer_size;
};
-/*
- * TODO: struct ad799x_platform_data needs to go into include/linux/iio
- */
-
-struct ad799x_platform_data {
- u16 vref_mv;
-};
-
#ifdef CONFIG_AD799X_RING_BUFFER
int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad799x_ring_cleanup(struct iio_dev *indio_dev);
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index 570c594..747d1da 100644
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -179,7 +179,10 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
RES_MASK(chan->scan_type.realbits);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- *val = st->int_vref_mv;
+ ret = regulator_get_voltage(st->vref);
+ if (ret < 0)
+ return ret;
+ *val = ret / 1000;
*val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
}
@@ -527,7 +530,6 @@ static int ad799x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
- struct ad799x_platform_data *pdata = client->dev.platform_data;
struct ad799x_state *st;
struct iio_dev *indio_dev;
@@ -545,17 +547,21 @@ static int ad799x_probe(struct i2c_client *client,
/* TODO: Add pdata options for filtering and bit delay */
- if (!pdata)
- return -EINVAL;
-
- st->int_vref_mv = pdata->vref_mv;
-
st->reg = devm_regulator_get(&client->dev, "vcc");
- if (!IS_ERR(st->reg)) {
- ret = regulator_enable(st->reg);
- if (ret)
- return ret;
+ if (IS_ERR(st->reg))
+ return PTR_ERR(st->reg);
+ ret = regulator_enable(st->reg);
+ if (ret)
+ return ret;
+ st->vref = devm_regulator_get(&client->dev, "vref");
+ if (IS_ERR(st->vref)) {
+ ret = PTR_ERR(st->vref);
+ goto error_disable_reg;
}
+ ret = regulator_enable(st->vref);
+ if (ret)
+ goto error_disable_reg;
+
st->client = client;
indio_dev->dev.parent = &client->dev;
@@ -592,6 +598,8 @@ error_free_irq:
error_cleanup_ring:
ad799x_ring_cleanup(indio_dev);
error_disable_reg:
+ if (!IS_ERR(st->vref))
+ regulator_disable(st->vref);
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
@@ -608,6 +616,8 @@ static int ad799x_remove(struct i2c_client *client)
free_irq(client->irq, indio_dev);
ad799x_ring_cleanup(indio_dev);
+ if (!IS_ERR(st->vref))
+ regulator_disable(st->vref);
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
kfree(st->rx_buf);
--
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