Add device tree table for matching vendor ID
and support for retrieving platform data
from device tree.
Signed-off-by: Nishad Kamdar <nishadkamdar@xxxxxxxxx>
---
drivers/staging/iio/resolver/ad2s1210.c | 43 ++++++++++++++++++++++++-
1 file changed, 42 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 93c3c70ce62e..9fd5461c4ed0 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -17,6 +17,7 @@
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -669,6 +670,27 @@ static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
return 0;
}
+#ifdef CONFIG_OF
+static struct ad2s1210_platform_data *ad2s1210_parse_dt(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct ad2s1210_platform_data *pdata;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ pdata->gpioin = of_property_read_bool(np, "adi,gpioin");
+
+ return pdata;
+}
+#else
+static struct ad2s1210_platform_data *ad2s1210_parse_dt(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
static int ad2s1210_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
@@ -682,7 +704,19 @@ static int ad2s1210_probe(struct spi_device *spi)
if (!indio_dev)
return -ENOMEM;
st = iio_priv(indio_dev);
- st->pdata = spi->dev.platform_data;
+ if (spi->dev.of_node) {
+ st->pdata = ad2s1210_parse_dt(&spi->dev);
+ if (!st->pdata)
+ return -EINVAL;
+ } else {
+ st->pdata = spi->dev.platform_data;
+ }
+
+ if (!st->pdata) {
+ dev_err(&spi->dev, "ad2s1210: no platform data supplied\n");
+ return -EINVAL;
+ }
+
ret = ad2s1210_setup_gpios(st);
if (ret < 0)
return ret;
@@ -724,6 +758,12 @@ static int ad2s1210_remove(struct spi_device *spi)
return 0;
}
+static const struct of_device_id ad2s1210_of_match[] = {
+ { .compatible = "adi,ad2s1210", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ad2s1210_of_match);
+
static const struct spi_device_id ad2s1210_id[] = {
{ "ad2s1210" },
{}
@@ -733,6 +773,7 @@ MODULE_DEVICE_TABLE(spi, ad2s1210_id);
static struct spi_driver ad2s1210_driver = {
.driver = {
.name = DRV_NAME,
+ .of_match_table = of_match_ptr(ad2s1210_of_match),
},
.probe = ad2s1210_probe,
.remove = ad2s1210_remove,
--
2.17.1
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