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| author | Tomas Novotny <tomas@novotny.cz> | 2016-10-18 19:43:09 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-10-23 20:34:24 +0200 |
| commit | 88e39a88b7ff4ec0deaf596bb653a6ca2c0c1f30 (patch) | |
| tree | ca3eb72433e2bd87afa85660bdc76fa9f908933d /drivers/iio/dac | |
| parent | iio: dac: mcp4725: support voltage reference selection (diff) | |
| download | linux-88e39a88b7ff4ec0deaf596bb653a6ca2c0c1f30.tar.xz linux-88e39a88b7ff4ec0deaf596bb653a6ca2c0c1f30.zip | |
iio: dac: mcp4725: add devicetree support
Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/dac')
| -rw-r--r-- | drivers/iio/dac/mcp4725.c | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c index 1e9d8f387e00..fae80eb1a98a 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 @@ 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, |