On 18/10/16 18:43, Tomas Novotny wrote:
> From: Tomas Novotny <tomas@xxxxxxxxxx>
>
> Use a standard framework to get the reference voltage. It is done that way
> in the iio subsystem and it will simplify extending of the driver.
>
> Structure mcp4725_platform_data is left undeleted because it used in the
> next patch.
>
> This change breaks the current users of the driver, but there is no
> mainline user of struct mcp4725_platform_data.
>
> Signed-off-by: Tomas Novotny <tomas@xxxxxxxxxx>
I've already applied this from V2.
Thanks,
Jonathan
> ---
> drivers/iio/dac/mcp4725.c | 45 ++++++++++++++++++++++++++++++++---------
> include/linux/iio/dac/mcp4725.h | 1 -
> 2 files changed, 36 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
> index cca935c..1f55d1b 100644
> --- a/drivers/iio/dac/mcp4725.c
> +++ b/drivers/iio/dac/mcp4725.c
> @@ -18,6 +18,7 @@
> #include <linux/i2c.h>
> #include <linux/err.h>
> #include <linux/delay.h>
> +#include <linux/regulator/consumer.h>
>
> #include <linux/iio/iio.h>
> #include <linux/iio/sysfs.h>
> @@ -28,10 +29,10 @@
>
> struct mcp4725_data {
> struct i2c_client *client;
> - u16 vref_mv;
> u16 dac_value;
> bool powerdown;
> unsigned powerdown_mode;
> + struct regulator *vdd_reg;
> };
>
> static int mcp4725_suspend(struct device *dev)
> @@ -283,13 +284,18 @@ static int mcp4725_read_raw(struct iio_dev *indio_dev,
> int *val, int *val2, long mask)
> {
> struct mcp4725_data *data = iio_priv(indio_dev);
> + int ret;
>
> switch (mask) {
> case IIO_CHAN_INFO_RAW:
> *val = data->dac_value;
> return IIO_VAL_INT;
> case IIO_CHAN_INFO_SCALE:
> - *val = data->vref_mv;
> + ret = regulator_get_voltage(data->vdd_reg);
> + if (ret < 0)
> + return ret;
> +
> + *val = ret / 1000;
> *val2 = 12;
> return IIO_VAL_FRACTIONAL_LOG2;
> }
> @@ -328,12 +334,12 @@ static int mcp4725_probe(struct i2c_client *client,
> {
> struct mcp4725_data *data;
> struct iio_dev *indio_dev;
> - struct mcp4725_platform_data *platform_data = client->dev.platform_data;
> + struct mcp4725_platform_data *pdata = dev_get_platdata(&client->dev);
> u8 inbuf[3];
> u8 pd;
> int err;
>
> - if (!platform_data || !platform_data->vref_mv) {
> + if (!pdata) {
> dev_err(&client->dev, "invalid platform data");
> return -EINVAL;
> }
> @@ -345,6 +351,14 @@ static int mcp4725_probe(struct i2c_client *client,
> i2c_set_clientdata(client, indio_dev);
> data->client = client;
>
> + data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
> + if (IS_ERR(data->vdd_reg))
> + return PTR_ERR(data->vdd_reg);
> +
> + err = regulator_enable(data->vdd_reg);
> + if (err)
> + return err;
> +
> indio_dev->dev.parent = &client->dev;
> indio_dev->name = id->name;
> indio_dev->info = &mcp4725_info;
> @@ -352,25 +366,38 @@ static int mcp4725_probe(struct i2c_client *client,
> indio_dev->num_channels = 1;
> indio_dev->modes = INDIO_DIRECT_MODE;
>
> - data->vref_mv = platform_data->vref_mv;
> -
> /* read current DAC value */
> err = i2c_master_recv(client, inbuf, 3);
> if (err < 0) {
> dev_err(&client->dev, "failed to read DAC value");
> - return err;
> + goto err_disable_vdd_reg;
> }
> pd = (inbuf[0] >> 1) & 0x3;
> data->powerdown = pd > 0 ? true : false;
> data->powerdown_mode = pd ? pd - 1 : 2; /* largest register to gnd */
> data->dac_value = (inbuf[1] << 4) | (inbuf[2] >> 4);
>
> - return iio_device_register(indio_dev);
> + err = iio_device_register(indio_dev);
> + if (err)
> + goto err_disable_vdd_reg;
> +
> + return 0;
> +
> +err_disable_vdd_reg:
> + regulator_disable(data->vdd_reg);
> +
> + return err;
> }
>
> static int mcp4725_remove(struct i2c_client *client)
> {
> - iio_device_unregister(i2c_get_clientdata(client));
> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct mcp4725_data *data = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> +
> + regulator_disable(data->vdd_reg);
> +
> return 0;
> }
>
> diff --git a/include/linux/iio/dac/mcp4725.h b/include/linux/iio/dac/mcp4725.h
> index 91530e6..7c062e8 100644
> --- a/include/linux/iio/dac/mcp4725.h
> +++ b/include/linux/iio/dac/mcp4725.h
> @@ -10,7 +10,6 @@
> #define IIO_DAC_MCP4725_H_
>
> struct mcp4725_platform_data {
> - u16 vref_mv;
> };
>
> #endif /* IIO_DAC_MCP4725_H_ */
>
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