[PATCH v3] media: i2c: tvp514x: add OF support
Lad Prabhakar
prabhakar.csengg at gmail.com
Tue May 14 21:00:36 EST 2013
From: Lad, Prabhakar <prabhakar.csengg at gmail.com>
add OF support for the tvp514x driver. Alongside this patch
removes unnecessary header file inclusion and sorts them alphabetically.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg at gmail.com>
Cc: Hans Verkuil <hans.verkuil at cisco.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab at redhat.com>
Cc: Guennadi Liakhovetski <g.liakhovetski at gmx.de>
Cc: Sylwester Nawrocki <s.nawrocki at samsung.com>
Cc: Sakari Ailus <sakari.ailus at iki.fi>
Cc: Grant Likely <grant.likely at secretlab.ca>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: Rob Landley <rob at landley.net>
Cc: devicetree-discuss at lists.ozlabs.org
Cc: linux-doc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: davinci-linux-open-source at linux.davincidsp.com
---
Tested on da850-evm.
RFC v1: https://patchwork.kernel.org/patch/2030061/
RFC v2: https://patchwork.kernel.org/patch/2061811/
Changes for current version from RFC v2:
1: Fixed review comments pointed by Sylwester.
Changes for v2:
1: Listed all the compatible property values in the documentation text file.
2: Removed "-decoder" from compatible property values.
3: Added a reference to the V4L2 DT bindings documentation to explain
what the port and endpoint nodes are for.
4: Fixed some Nits pointed by Laurent.
5: Removed unnecessary header file includes and sort them alphabetically.
Changes for v3:
1: Rebased on patch https://patchwork.kernel.org/patch/2539411/
.../devicetree/bindings/media/i2c/tvp514x.txt | 45 ++++++++++++
drivers/media/i2c/tvp514x.c | 74 +++++++++++++++----
2 files changed, 103 insertions(+), 16 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/i2c/tvp514x.txt
diff --git a/Documentation/devicetree/bindings/media/i2c/tvp514x.txt b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
new file mode 100644
index 0000000..cc09424
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/tvp514x.txt
@@ -0,0 +1,45 @@
+* 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 of port node refer Documentation/devicetree/bindings/media/
+video-interfaces.txt.
+
+Example:
+
+ i2c0 at 1c22000 {
+ ...
+ ...
+ tvp514x at 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 01d9757..202c8cb 100644
--- a/drivers/media/i2c/tvp514x.c
+++ b/drivers/media/i2c/tvp514x.c
@@ -29,21 +29,16 @@
*
*/
-#include <linux/i2c.h>
-#include <linux/slab.h>
#include <linux/delay.h>
-#include <linux/videodev2.h>
+#include <linux/i2c.h>
#include <linux/module.h>
-#include <linux/v4l2-mediabus.h>
+#include <media/media-entity.h>
+#include <media/tvp514x.h>
#include <media/v4l2-async.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-mediabus.h>
-#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
-#include <media/tvp514x.h>
-#include <media/media-entity.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
#include "tvp514x_regs.h"
@@ -1056,6 +1051,40 @@ 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)
+ 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;
+
+ return pdata;
+}
+
/**
* tvp514x_probe() - decoder driver i2c probe handler
* @client: i2c driver client device structure
@@ -1067,19 +1096,20 @@ 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 +1121,7 @@ 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
@@ -1239,8 +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,
},
--
1.7.4.1
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