build/patch/kernel/sun8i-dev/add-ad9834-dt-bindings.patch

diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index 19216af1..e839d23a 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -13,11 +13,14 @@
 #include <linux/slab.h>
 #include <linux/sysfs.h>
 #include <linux/list.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/spi/spi.h>
 #include <linux/regulator/consumer.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <asm/div64.h>
+#include <linux/clk.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -316,14 +319,81 @@ 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);
+
+	pdata->freq0 = 134000;
+	of_property_read_u32(np, "freq0", &pdata->freq0);
+
+	pdata->freq1 = 134000;
+	of_property_read_u32(np, "freq1", &pdata->freq1);
+
+	pdata->phase0 = 0;
+	of_property_read_u16(np, "phase0", &pdata->phase0);
+
+	pdata->phase1 = 0;
+	of_property_read_u16(np, "phase1", &pdata->phase1);
+
+	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 const struct of_device_id ad9834_of_match[] = {
+	{
+		.compatible	= "adi,ad9833",
+		.data		= (void *)ID_AD9833,
+	},
+	{
+		.compatible	= "adi,ad9834",
+		.data		= (void *)ID_AD9834,
+	},
+	{
+		.compatible	= "adi,ad9837",
+		.data		= (void *)ID_AD9837,
+	},
+	{
+		.compatible	= "adi,ad9838",
+		.data		= (void *)ID_AD9838,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ad9834_of_match);
+
 static int ad9834_probe(struct spi_device *spi)
 {
-	struct ad9834_platform_data *pdata = dev_get_platdata(&spi->dev);
+	const struct of_device_id *of_id = of_match_device(ad9834_of_match,
+							   &spi->dev);
+	struct ad9834_platform_data *pdata;
 	struct ad9834_state *st;
 	struct iio_dev *indio_dev;
 	struct regulator *reg;
+	struct clk *clk = NULL;
 	int ret;
 
+	if (!pdata && spi->dev.of_node) {
+		pdata = ad9834_parse_dt(spi);
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+	} else {
+		pdata = spi->dev.platform_data;
+	}
+
 	if (!pdata) {
 		dev_dbg(&spi->dev, "no platform data?\n");
 		return -ENODEV;
@@ -346,9 +416,30 @@ static int ad9834_probe(struct spi_device *spi)
 	}
 	spi_set_drvdata(spi, indio_dev);
 	st = iio_priv(indio_dev);
-	st->mclk = pdata->mclk;
+
+	if (!pdata->mclk) {
+		clk = devm_clk_get(&spi->dev, NULL);
+		if (IS_ERR(clk))
+			return -EPROBE_DEFER;
+
+		ret = clk_prepare_enable(clk);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (clk) {
+		st->clk = clk;
+		st->mclk = clk_get_rate(clk);
+	} else {
+		st->mclk = pdata->mclk;
+	}
+
+	if (of_id)
+		st->devid = (enum ad9834_supported_device_ids)of_id->data;
+	else
+		st->devid = spi_get_device_id(spi)->driver_data;
+
 	st->spi = spi;
-	st->devid = spi_get_device_id(spi)->driver_data;
 	st->reg = reg;
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
@@ -421,6 +512,9 @@ static int ad9834_probe(struct spi_device *spi)
 error_disable_reg:
 	regulator_disable(reg);
 
+if (clk)
+		clk_disable_unprepare(clk);
+
 	return ret;
 }
 
@@ -431,6 +525,8 @@ static int ad9834_remove(struct spi_device *spi)
 
 	iio_device_unregister(indio_dev);
 	regulator_disable(st->reg);
+if (st->clk)
+		clk_disable_unprepare(st->clk);
 
 	return 0;
 }
@@ -447,6 +543,7 @@ MODULE_DEVICE_TABLE(spi, ad9834_id);
 static struct spi_driver ad9834_driver = {
 	.driver = {
 		.name	= "ad9834",
+		.of_match_table = of_match_ptr(ad9834_of_match),
 	},
 	.probe		= ad9834_probe,
 	.remove		= ad9834_remove,
diff --git a/drivers/staging/iio/frequency/ad9834.h b/drivers/staging/iio/frequency/ad9834.h
index 40fdd5da..fd9cccf3 100644
--- a/drivers/staging/iio/frequency/ad9834.h
+++ b/drivers/staging/iio/frequency/ad9834.h
@@ -53,6 +53,7 @@
 struct ad9834_state {
 	struct spi_device		*spi;
 	struct regulator		*reg;
+	struct clk				*clk;
 	unsigned int			mclk;
 	unsigned short			control;
 	unsigned short			devid;