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iio: dac: mcp4725: add devicetree support 

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Tomas Novotny 2016-10-18 19:43:09 +02:00 committed by Jonathan Cameron
parent 29157c6d60
commit 88e39a88b7
1 changed files with 37 additions and 6 deletions
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43
drivers/iio/dac/mcp4725.c
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@ -19,6 +19,7 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/of.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@ -364,22 +365,41 @@ static const struct iio_info mcp4725_info = {
.driver_module = THIS_MODULE,
};
#ifdef CONFIG_OF
static int mcp4725_probe_dt(struct device *dev,
struct mcp4725_platform_data *pdata)
{
struct device_node *np = dev->of_node;
if (!np)
return -ENODEV;
/* check if is the vref-supply defined */
pdata->use_vref = of_property_read_bool(np, "vref-supply");
pdata->vref_buffered =
of_property_read_bool(np, "microchip,vref-buffered");
return 0;
}
#else
static int mcp4725_probe_dt(struct device *dev,
struct mcp4725_platform_data *platform_data)
{
return -ENODEV;
}
#endif
static int mcp4725_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mcp4725_data *data;
struct iio_dev *indio_dev;
struct mcp4725_platform_data *pdata = dev_get_platdata(&client->dev);
struct mcp4725_platform_data *pdata, pdata_dt;
u8 inbuf[4];
u8 pd;
u8 ref;
int err;
if (!pdata) {
dev_err(&client->dev, "invalid platform data");
return -EINVAL;
}
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (indio_dev == NULL)
return -ENOMEM;
@ -387,6 +407,17 @@ static int mcp4725_probe(struct i2c_client *client,
i2c_set_clientdata(client, indio_dev);
data->client = client;
data->id = id->driver_data;
pdata = dev_get_platdata(&client->dev);
if (!pdata) {
err = mcp4725_probe_dt(&client->dev, &pdata_dt);
if (err) {
dev_err(&client->dev,
"invalid platform or devicetree data");
return err;
}
pdata = &pdata_dt;
}
if (data->id == MCP4725 && pdata->use_vref) {
dev_err(&client->dev,