Add device-tree support to pxa_camera host driver.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
---
 drivers/media/platform/soc_camera/pxa_camera.c | 77 +++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c
index d4df305..8c9de9e 100644
--- a/drivers/media/platform/soc_camera/pxa_camera.c
+++ b/drivers/media/platform/soc_camera/pxa_camera.c

@@ -34,6 +34,7 @@
 #include <media/videobuf-dma-sg.h>
 #include <media/soc_camera.h>
 #include <media/soc_mediabus.h>
+#include <media/v4l2-of.h>
 
 #include <linux/videodev2.h>
 

@@ -1650,6 +1651,64 @@ static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
 	.set_bus_param	= pxa_camera_set_bus_param,
 };
 
+static int pxa_camera_pdata_from_dt(struct device *dev,
+				    struct pxa_camera_dev *pcdev)
+{
+	int err = 0;
+	struct device_node *np = dev->of_node;
+	struct v4l2_of_endpoint ep;
+
+	err = of_property_read_u32(np, "clock-frequency",
+				   (u32 *)&pcdev->mclk);