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

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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>
This commit is contained in:
Lad, Prabhakar 2013-06-04 12:26:23 -03:00 committed by Mauro Carvalho Chehab
parent 379d2cf4b5
commit b610b5928d
2 changed files with 100 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
Documentation/devicetree/bindings/media/i2c/tvp514x.txt Normal file
View File

@ -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>;
};
};
};
...
};

62
drivers/media/i2c/tvp514x.c
View File

@ -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,
},