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staging:iio:ad799x use regulator for vref 

Switch the ad799x driver to use the regulator framework and add binding for reference voltage.

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Hartmut Knaack 2014-02-16 12:02:00 +00:00 committed by Jonathan Cameron
parent 630097f748
commit 2deaf23b22
2 changed files with 22 additions and 20 deletions
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10
drivers/staging/iio/adc/ad799x.h
View File

@ -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);

26
drivers/staging/iio/adc/ad799x_core.c
View File

@ -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;
}
@ -533,7 +536,6 @@ 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;
@ -551,17 +553,21 @@ 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)) {
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;
@ -597,6 +603,8 @@ static int ad799x_probe(struct i2c_client *client,
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);
@ -611,6 +619,8 @@ static int ad799x_remove(struct i2c_client *client)
iio_device_unregister(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);