Commit c0d9644f authored by Lad, Prabhakar's avatar Lad, Prabhakar Committed by Mauro Carvalho Chehab
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[media] media: i2c: tvp7002: add OF support 



add OF support for the tvp7002 driver.

Signed-off-by: default avatarLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent d1d70aa6

Documentation/devicetree/bindings/media/i2c/tvp7002.txt

0 → 100644
+53 −0
Original line number Diff line number Diff line 
* Texas Instruments TV7002 video decoder



The TVP7002 device supports digitizing of video and graphics signal in RGB and

YPbPr color space.



Required Properties :

- compatible : Must be "ti,tvp7002"



Optional Properties:

- hsync-active: HSYNC Polarity configuration for the bus. Default value when

  this property is not specified is <0>.



- vsync-active: VSYNC Polarity configuration for the bus. Default value when

  this property is not specified is <0>.



- pclk-sample: Clock polarity of the bus. Default value when this property is

  not specified is <0>.



- sync-on-green-active: Active state of Sync-on-green signal property of the

  endpoint.

  0 = Normal Operation (Active Low, Default)

  1 = Inverted operation



- field-even-active: Active-high Field ID output polarity control of the bus.

  Under normal operation, the field ID output is set to logic 1 for an odd field

  (field 1) and set to logic 0 for an even field (field 0).

  0 = Normal Operation (Active Low, Default)

  1 = FID output polarity inverted



For further reading of port node refer Documentation/devicetree/bindings/media/

video-interfaces.txt.



Example:



	i2c0@1c22000 {

		...

		...

		tvp7002@5c {

			compatible = "ti,tvp7002";

			reg = <0x5c>;



			port {

				tvp7002_1: endpoint {

					hsync-active = <1>;

					vsync-active = <1>;

					pclk-sample = <0>;

					sync-on-green-active = <1>;

					field-even-active = <0>;

				};

			};

		};

		...

	};

drivers/media/i2c/tvp7002.c

+60 −7
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ 
#include <media/v4l2-device.h>

#include <media/v4l2-common.h>

#include <media/v4l2-ctrls.h>

#include <media/v4l2-of.h>



#include "tvp7002_reg.h"



MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver");
@@ -943,6 +945,48 @@ static const struct v4l2_subdev_ops tvp7002_ops = { 
	.pad = &tvp7002_pad_ops,

};



static struct tvp7002_config *

tvp7002_get_pdata(struct i2c_client *client)

{

	struct v4l2_of_endpoint bus_cfg;

	struct tvp7002_config *pdata;

	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;



	if (flags & V4L2_MBUS_FIELD_EVEN_HIGH)

		pdata->fid_polarity = 1;



	if (flags & V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH)

		pdata->sog_polarity = 1;



done:

	of_node_put(endpoint);

	return pdata;

}



/*

 * tvp7002_probe - Probe a TVP7002 device

 * @c: ptr to i2c_client struct
@@ -954,32 +998,32 @@ static const struct v4l2_subdev_ops tvp7002_ops = { 
 */

static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)

{

	struct tvp7002_config *pdata = tvp7002_get_pdata(c);

	struct v4l2_subdev *sd;

	struct tvp7002 *device;

	struct v4l2_dv_timings timings;

	int polarity_a;

	int polarity_b;

	u8 revision;



	int error;



	if (pdata == NULL) {

		dev_err(&c->dev, "No platform data\n");

		return -EINVAL;

	}



	/* Check if the adapter supports the needed features */

	if (!i2c_check_functionality(c->adapter,

		I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))

		return -EIO;



	if (!c->dev.platform_data) {

		v4l_err(c, "No platform data!!\n");

		return -ENODEV;

	}



	device = devm_kzalloc(&c->dev, sizeof(struct tvp7002), GFP_KERNEL);



	if (!device)

		return -ENOMEM;



	sd = &device->sd;

	device->pdata = c->dev.platform_data;

	device->pdata = pdata;

	device->current_timings = tvp7002_timings;



	/* Tell v4l2 the device is ready */
@@ -1084,9 +1128,18 @@ static const struct i2c_device_id tvp7002_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, tvp7002_id);



#if IS_ENABLED(CONFIG_OF)

static const struct of_device_id tvp7002_of_match[] = {

	{ .compatible = "ti,tvp7002", },

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(of, tvp7002_of_match);

#endif



/* I2C driver data */

static struct i2c_driver tvp7002_driver = {

	.driver = {

		.of_match_table = of_match_ptr(tvp7002_of_match),

		.owner = THIS_MODULE,

		.name = TVP7002_MODULE_NAME,

	},