From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758885Ab3EOMDb (ORCPT ); Wed, 15 May 2013 08:03:31 -0400 Received: from mail-pd0-f176.google.com ([209.85.192.176]:55257 "EHLO mail-pd0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758676Ab3EOMD3 (ORCPT ); Wed, 15 May 2013 08:03:29 -0400 From: Lad Prabhakar To: LMML Cc: LKML , DLOS , "Lad, Prabhakar" , Hans Verkuil , Laurent Pinchart , Mauro Carvalho Chehab , Guennadi Liakhovetski , Sylwester Nawrocki , Sakari Ailus , Grant Likely , Rob Herring , Rob Landley , devicetree-discuss@lists.ozlabs.org, linux-doc@vger.kernel.org Subject: [PATCH 6/6] media: i2c: ths7303: add OF support Date: Wed, 15 May 2013 17:27:22 +0530 Message-Id: <1368619042-28252-7-git-send-email-prabhakar.csengg@gmail.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1368619042-28252-1-git-send-email-prabhakar.csengg@gmail.com> References: <1368619042-28252-1-git-send-email-prabhakar.csengg@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lad, Prabhakar add OF support for the ths7303 driver. Signed-off-by: Lad, Prabhakar Cc: Hans Verkuil Cc: Laurent Pinchart Cc: Mauro Carvalho Chehab Cc: Guennadi Liakhovetski Cc: Sylwester Nawrocki Cc: Sakari Ailus Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley 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 --- .../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@1c22000 { + ... + ... + 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 #include #include +#include #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