ad9834 driver needs some default properties. Currently these parameters are
provided through platform_data.
This patch adds a function to create this pdata based on device-tree node.
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@xxxxxxxxxxxxxx>
---
drivers/staging/iio/frequency/ad9834.c | 39 ++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index 6366216..6cec154 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -316,6 +316,39 @@ static const struct iio_info ad9833_info = {
.driver_module = THIS_MODULE,
};
+#if defined(CONFIG_OF)
+static struct ad9834_platform_data *ad9834_parse_dt(struct spi_device *spi)
+{
+ struct ad9834_platform_data *pdata;
+ struct device_node *np = spi->dev.of_node;
+
+ pdata = devm_kzalloc(&spi->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ if (of_property_read_u32(np, "mclk", &pdata->mclk))
+ return ERR_PTR(-ENODEV);
+ if (of_property_read_u32(np, "freq0", &pdata->freq0))
+ return ERR_PTR(-ENODEV);
+ if (of_property_read_u32(np, "freq1", &pdata->freq1))
+ return ERR_PTR(-ENODEV);
+ if (of_property_read_u16(np, "phase0", &pdata->phase0))
+ return ERR_PTR(-ENODEV);
+ if (of_property_read_u16(np, "phase1", &pdata->phase1))
+ return ERR_PTR(-ENODEV);
+ pdata->en_div2 = of_property_read_bool(np, "en_div2");
+ pdata->en_signbit_msb_out = of_property_read_bool(np,
+ "en_signbit_msb_out");
+
+ return pdata;
+}
+#else
+static struct ad9834_platform_data *ad9834_parse_dt(struct spi_device *spi)
+{
+ return NULL;
+}
+#endif
+
static int ad9834_probe(struct spi_device *spi)
{
struct ad9834_platform_data *pdata = dev_get_platdata(&spi->dev);
@@ -324,6 +357,12 @@ static int ad9834_probe(struct spi_device *spi)
struct regulator *reg;
int ret;
+ if (!pdata && spi->dev.of_node) {
+ pdata = ad9834_parse_dt(spi);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
+
if (!pdata) {
dev_dbg(&spi->dev, "no platform data?\n");
return -ENODEV;
--
2.9.3
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
