[PATCH RESEND 7/7] IIO: ti_am335x_adc: Add DT support

[Patil, Rachna]

Add DT support for client ADC driver.

Signed-off-by: Patil, Rachna <rac...@ti.com>
---
 drivers/iio/adc/ti_am335x_adc.c |   24 ++++++++++++++++++++----
 1 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 02a43c8..1f1ec0c 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -22,6 +22,8 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/iio/iio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <linux/mfd/ti_am335x_tscadc.h>
 #include <linux/platform_data/ti_am335x_adc.h>
@@ -141,11 +143,18 @@ static int __devinit tiadc_probe(struct platform_device 
*pdev)
        struct iio_dev          *indio_dev;
        struct tiadc_device     *adc_dev;
        struct ti_tscadc_dev    *tscadc_dev = pdev->dev.platform_data;
-       struct mfd_tscadc_board *pdata;
+       struct mfd_tscadc_board *pdata = NULL;
+       struct device_node      *node = NULL;
        int                     err;
+       u32                     val32;
 
-       pdata = tscadc_dev->dev->platform_data;
-       if (!pdata || !pdata->adc_init) {
+       if (tscadc_dev->dev->of_node) {
+               node = tscadc_dev->dev->of_node;
+               node = of_find_node_by_name(node, "adc");
+       } else
+               pdata = tscadc_dev->dev->platform_data;
+
+       if (!pdata && !node) {
                dev_err(&pdev->dev, "Could not find platform data\n");
                return -EINVAL;
        }
@@ -159,7 +168,14 @@ static int __devinit tiadc_probe(struct platform_device 
*pdev)
        adc_dev = iio_priv(indio_dev);
 
        adc_dev->mfd_tscadc = tscadc_dev;
-       adc_dev->channels = pdata->adc_init->adc_channels;
+       if (node) {
+               err = of_property_read_u32(node, "adc-channels", &val32);
+               if (err < 0)
+                       goto err_free_device;
+               else
+                       adc_dev->channels = val32;
+       } else
+               adc_dev->channels = pdata->adc_init->adc_channels;
 
        indio_dev->dev.parent = &pdev->dev;
        indio_dev->name = dev_name(&pdev->dev);
-- 
1.7.0.4

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