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Date: Wed, 15 May 2013 17:27:22 +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 6/6] media: i2c: ths7303: add OF support
From: Lad, Prabhakar <prabhakar.csengg@...il.com>
add OF support for the ths7303 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/ths73x3.txt | 50 ++++++++++++++++++++
drivers/media/i2c/ths7303.c | 37 ++++++++++++++-
2 files changed, 86 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ths73x3.txt
diff --git a/Documentation/devicetree/bindings/media/i2c/ths73x3.txt b/Documentation/devicetree/bindings/media/i2c/ths73x3.txt
new file mode 100644
index 0000000..62f63e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ths73x3.txt
@@ -0,0 +1,50 @@
+* Texas Instruments THS7303/THS7353 video amplifier
+
+The THS7303/THS7353 device is a low power 3-channel integrated video buffer
+which can be configured individually via i2c for all the functions which makes
+it flexible for any application. It incorporates a selectable fifth-order
+Butterworth filter to eliminate data converter images.
+
+Required Properties :
+- compatible : value should be either one among the following
+ (a) "ti,ths7303" for ths7303 video amplifier.
+ (b) "ti,ths7353" for ths7353 video amplifier.
+
+- ti,ths73x3-ch1-bias: Bias value for channel 1.
+
+- ti,ths73x3-ch2-bias: Bias value for channel 2.
+
+- ti,ths73x3-ch3-bias: Bias value for channel 3.
+
+Bias values for channel-1/2/3 can be following (values default to zero):-
+ - 0: Disable Channel - Conserves Power
+ - 1: Channel On - Mute Function - No Output
+ - 2: Channel On - DC Bias Select
+ - 3: Channel On - DC Bias + 250 mV Offset Select
+ - 4: Channel On - AC Bias Select
+ - 5: Channel On - Sync Tip Clam with low bias
+ - 6: Channel On - Sync Tip Clam with mid bias
+ - 7: Channel On - Sync Tip Clam with high bias
+
+For further reading of port node refer Documentation/devicetree/bindings/media/
+video-interfaces.txt.
+
+Example:
+
+ i2c0@...2000 {
+ ...
+ ...
+ ths7303@2c {
+ compatible = "ti,ths7303";
+ reg = <0x2c>;
+
+ port {
+ ths7303_1: endpoint {
+ ti,ths73x3-ch1-bias = <3>;
+ ti,ths73x3-ch2-bias = <3>;
+ ti,ths73x3-ch3-bias = <3>;
+ };
+ };
+ };
+ ...
+ };
diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index 4f772a2..a648313 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -29,6 +29,7 @@
#include <media/v4l2-async.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
#define THS7303_CHANNEL_1 1
#define THS7303_CHANNEL_2 2
@@ -350,10 +351,34 @@ static const struct v4l2_subdev_ops ths7303_ops = {
.video = &ths7303_video_ops,
};
+static struct ths7303_platform_data *
+ths7303_get_pdata(struct i2c_client *client)
+{
+ struct ths7303_platform_data *pdata;
+ struct device_node *endpoint;
+
+ 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;
+
+ of_property_read_u8(endpoint, "ti,ths73x3-ch1-bias", &pdata->ch_1);
+ of_property_read_u8(endpoint, "ti,ths73x3-ch2-bias", &pdata->ch_2);
+ of_property_read_u8(endpoint, "ti,ths73x3-ch3-bias", &pdata->ch_3);
+
+ return pdata;
+}
+
static int ths7303_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct ths7303_platform_data *pdata = client->dev.platform_data;
+ struct ths7303_platform_data *pdata = ths7303_get_pdata(client);
struct ths7303_state *state;
struct v4l2_subdev *sd;
int ret;
@@ -414,8 +439,18 @@ static const struct i2c_device_id ths7303_id[] = {
MODULE_DEVICE_TABLE(i2c, ths7303_id);
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ths73x3_of_match[] = {
+ { .compatible = "ti,ths7303", },
+ { .compatible = "ti,ths7353", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ths73x3_of_match);
+#endif
+
static struct i2c_driver ths7303_driver = {
.driver = {
+ .of_match_table = of_match_ptr(ths73x3_of_match),
.owner = THIS_MODULE,
.name = "ths73x3",
},
--
1.7.4.1
--
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