iio: dac: mcp4725: add devicetree support
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
index 1e9d8f3..fae80eb 100644
--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -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 @@
.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 @@
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,