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Commit b610b592 authored by Lad, Prabhakar's avatar Lad, Prabhakar Committed by Mauro Carvalho Chehab
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[media] media: i2c: tvp514x: add OF support 



add OF support for the tvp514x driver.

Signed-off-by: default avatarLad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: default avatarLaurent 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: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 379d2cf4

Documentation/devicetree/bindings/media/i2c/tvp514x.txt

0 → 100644
+44 −0
Original line number Diff line number Diff line 
* 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>;

				};

			};

		};

		...

	};

drivers/media/i2c/tvp514x.c

+56 −6
Original line number Diff line number Diff line
@@ -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,

	},