[media] media: i2c: mt9p031: add OF support

Add OF support for the mt9p031 sensor driver.
Alongside this patch sorts the header inclusion alphabetically.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 40 insertions, 2 deletions

diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index fe3414866a63..1abc86ed2255 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -16,9 +16,10 @@
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/gpio.h>
-#include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
 #include <linux/pm.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
@@ -27,6 +28,7 @@
 #include <media/mt9p031.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
 #include <media/v4l2-subdev.h>
 
 #include "aptina-pll.h"
@@ -927,10 +929,36 @@ static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = {
  * Driver initialization and probing
  */
 
+static struct mt9p031_platform_data *
+mt9p031_get_pdata(struct i2c_client *client)
+{
+        struct mt9p031_platform_data *pdata;
+        struct device_node *np;
+
+        if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
+                return client->dev.platform_data;
+
+        np = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
+        if (!np)
+                return NULL;
+
+        pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                goto done;
+
+        pdata->reset = of_get_named_gpio(client->dev.of_node, "reset-gpios", 0);
+        of_property_read_u32(np, "input-clock-frequency", &pdata->ext_freq);
+        of_property_read_u32(np, "pixel-clock-frequency", &pdata->target_freq);
+
+done:
+        of_node_put(np);
+        return pdata;
+}
+
 static int mt9p031_probe(struct i2c_client *client,
                          const struct i2c_device_id *did)
 {
-        struct mt9p031_platform_data *pdata = client->dev.platform_data;
+        struct mt9p031_platform_data *pdata = mt9p031_get_pdata(client);
         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
         struct mt9p031 *mt9p031;
         unsigned int i;
@@ -1069,8 +1097,18 @@ static const struct i2c_device_id mt9p031_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mt9p031_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id mt9p031_of_match[] = {
+        { .compatible = "aptina,mt9p031", },
+        { .compatible = "aptina,mt9p031m", },
+        { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt9p031_of_match);
+#endif
+
 static struct i2c_driver mt9p031_i2c_driver = {
         .driver = {
+                .of_match_table = of_match_ptr(mt9p031_of_match),
                 .name = "mt9p031",
         },
         .probe          = mt9p031_probe,