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Date: Tue, 14 May 2013 16:15:34 +0530
From: Lad Prabhakar <prabhakar.csengg@...il.com>
To: LMML <linux-media@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
Hans Verkuil <hans.verkuil@...co.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...hat.com>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Sakari Ailus <sakari.ailus@....fi>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org
Subject: [PATCH 5/5] media: i2c: tvp7002: add OF support
From: Lad, Prabhakar <prabhakar.csengg@...il.com>
add OF support for the tvp7002 driver.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Cc: Hans Verkuil <hans.verkuil@...co.com>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc: Sakari Ailus <sakari.ailus@....fi>
Cc: Grant Likely <grant.likely@...retlab.ca>
Cc: Rob Herring <rob.herring@...xeda.com>
Cc: Rob Landley <rob@...dley.net>
Cc: devicetree-discuss@...ts.ozlabs.org
Cc: linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: davinci-linux-open-source@...ux.davincidsp.com
---
.../devicetree/bindings/media/i2c/tvp7002.txt | 42 +++++++++++++
drivers/media/i2c/tvp7002.c | 64 +++++++++++++++++--
2 files changed, 99 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/i2c/tvp7002.txt
diff --git a/Documentation/devicetree/bindings/media/i2c/tvp7002.txt b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt
new file mode 100644
index 0000000..1ebd8b1
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/tvp7002.txt
@@ -0,0 +1,42 @@
+* 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"
+
+- hsync-active: HSYNC Polarity configuration for endpoint.
+
+- vsync-active: VSYNC Polarity configuration for endpoint.
+
+- pclk-sample: Clock polarity of the endpoint.
+
+- ti,tvp7002-fid-polarity: Active-high Field ID polarity of the endpoint.
+
+- ti,tvp7002-sog-polarity: Sync on Green output polarity of the endpoint.
+
+For further reading of port node refer Documentation/devicetree/bindings/media/
+video-interfaces.txt.
+
+Example:
+
+ i2c0@...2000 {
+ ...
+ ...
+ tvp7002@5c {
+ compatible = "ti,tvp7002";
+ reg = <0x5c>;
+
+ port {
+ tvp7002_1: endpoint {
+ hsync-active = <1>;
+ vsync-active = <1>;
+ pclk-sample = <0>;
+ ti,tvp7002-fid-polarity;
+ ti,tvp7002-sog-polarity;
+ };
+ };
+ };
+ ...
+ };
diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c
index d5113d1..942e0d8 100644
--- a/drivers/media/i2c/tvp7002.c
+++ b/drivers/media/i2c/tvp7002.c
@@ -35,6 +35,7 @@
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
#include "tvp7002_reg.h"
@@ -976,6 +977,46 @@ 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)
+ return NULL;
+
+ 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;
+
+ pdata->fid_polarity = of_property_read_bool(endpoint,
+ "ti,tvp7002-fid-polarity");
+
+ pdata->sog_polarity = of_property_read_bool(endpoint,
+ "ti,tvp7002-sog-polarity");
+
+ return pdata;
+}
+
/*
* tvp7002_probe - Probe a TVP7002 device
* @c: ptr to i2c_client struct
@@ -987,32 +1028,32 @@ 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 */
@@ -1119,9 +1160,18 @@ 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,
},
--
1.7.4.1
--
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