[media] media: i2c: tvp514x: add OF support

add OF support for the tvp514x driver.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Rob Landley <rob@landley.net>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/Documentation/devicetree/bindings/media/i2c/tvp514x.txt b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
new file mode 100644 (file)
index 0000000..46752cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
@@ -0,0 +1,44 @@
+* Texas Instruments TVP514x video decoder
+
+The TVP5146/TVP5146m2/TVP5147/TVP5147m1 device is high quality, single-chip
+digital video decoder that digitizes and decodes all popular baseband analog
+video formats into digital video component. The tvp514x decoder supports analog-
+to-digital (A/D) conversion of component RGB and YPbPr signals as well as A/D
+conversion and decoding of NTSC, PAL and SECAM composite and S-video into
+component YCbCr.
+
+Required Properties :
+- compatible : value should be either one among the following
+       (a) "ti,tvp5146" for tvp5146 decoder.
+       (b) "ti,tvp5146m2" for tvp5146m2 decoder.
+       (c) "ti,tvp5147" for tvp5147 decoder.
+       (d) "ti,tvp5147m1" for tvp5147m1 decoder.
+
+- hsync-active: HSYNC Polarity configuration for endpoint.
+
+- vsync-active: VSYNC Polarity configuration for endpoint.
+
+- pclk-sample: Clock polarity of the endpoint.
+
+For further reading on port node refer to Documentation/devicetree/bindings/
+media/video-interfaces.txt.
+
+Example:
+
+       i2c0@1c22000 {
+               ...
+               ...
+               tvp514x@5c {
+                       compatible = "ti,tvp5146";
+                       reg = <0x5c>;
+
+                       port {
+                               tvp514x_1: endpoint {
+                                       hsync-active = <1>;
+                                       vsync-active = <1>;
+                                       pclk-sample = <0>;
+                               };
+                       };
+               };
+               ...
+       };

diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c
index b8061b5..864eb14 100644 (file)
--- a/drivers/media/i2c/tvp514x.c
+++ b/drivers/media/i2c/tvp514x.c
@@ -39,6 +39,7 @@
 #include <media/v4l2-device.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-mediabus.h>
+#include <media/v4l2-of.h>
 #include <media/v4l2-ctrls.h>
 #include <media/tvp514x.h>
 #include <media/media-entity.h>
@@ -1056,6 +1057,42 @@ static struct tvp514x_decoder tvp514x_dev = {
 
 };
 
+static struct tvp514x_platform_data *
+tvp514x_get_pdata(struct i2c_client *client)
+{
+       struct tvp514x_platform_data *pdata;
+       struct v4l2_of_endpoint bus_cfg;
+       struct device_node *endpoint;
+       unsigned int flags;
+
+       if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
+               return client->dev.platform_data;
+
+       endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
+       if (!endpoint)
+               return NULL;
+
+       pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+       if (!pdata)
+               goto done;
+
+       v4l2_of_parse_endpoint(endpoint, &bus_cfg);
+       flags = bus_cfg.bus.parallel.flags;
+
+       if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+               pdata->hs_polarity = 1;
+
+       if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
+               pdata->vs_polarity = 1;
+
+       if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+               pdata->clk_polarity = 1;
+
+done:
+       of_node_put(endpoint);
+       return pdata;
+}
+
 /**
  * tvp514x_probe() - decoder driver i2c probe handler
  * @client: i2c driver client device structure
@@ -1067,19 +1104,20 @@ static struct tvp514x_decoder tvp514x_dev = {
 static int
 tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
+       struct tvp514x_platform_data *pdata = tvp514x_get_pdata(client);
        struct tvp514x_decoder *decoder;
        struct v4l2_subdev *sd;
        int ret;
 
+       if (pdata == NULL) {
+               dev_err(&client->dev, "No platform data\n");
+               return -EINVAL;
+       }
+
        /* Check if the adapter supports the needed features */
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                return -EIO;
 
-       if (!client->dev.platform_data) {
-               v4l2_err(client, "No platform data!!\n");
-               return -ENODEV;
-       }
-
        decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
        if (!decoder)
                return -ENOMEM;
@@ -1091,7 +1129,7 @@ tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id)
                        sizeof(tvp514x_reg_list_default));
 
        /* Copy board specific information here */
-       decoder->pdata = client->dev.platform_data;
+       decoder->pdata = pdata;
 
        /**
         * Fetch platform specific data, and configure the
@@ -1231,8 +1269,20 @@ static const struct i2c_device_id tvp514x_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, tvp514x_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id tvp514x_of_match[] = {
+       { .compatible = "ti,tvp5146", },
+       { .compatible = "ti,tvp5146m2", },
+       { .compatible = "ti,tvp5147", },
+       { .compatible = "ti,tvp5147m1", },
+       { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, tvp514x_of_match);
+#endif
+
 static struct i2c_driver tvp514x_driver = {
        .driver = {
+               .of_match_table = of_match_ptr(tvp514x_of_match),
                .owner = THIS_MODULE,
                .name = TVP514X_MODULE_NAME,
        },