From patchwork Tue Feb 10 09:31:35 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 28186 X-Patchwork-Delegate: g.liakhovetski@gmx.de Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1YL7AL-0003FQ-OP; Tue, 10 Feb 2015 10:31:33 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.72/mailfrontend-7) with esmtp id 1YL7AJ-000613-2X; Tue, 10 Feb 2015 10:31:33 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754311AbbBJJb2 (ORCPT + 1 other); Tue, 10 Feb 2015 04:31:28 -0500 Received: from eusmtp01.atmel.com ([212.144.249.242]:49254 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754136AbbBJJb1 (ORCPT ); Tue, 10 Feb 2015 04:31:27 -0500 Received: from apsmtp01.atmel.com (10.168.254.31) by eusmtp01.atmel.com (10.161.101.30) with Microsoft SMTP Server id 14.2.347.0; Tue, 10 Feb 2015 10:31:22 +0100 Received: from melon.corp.atmel.com (10.168.254.13) by apsmtp01.atmel.com (10.168.254.31) with Microsoft SMTP Server id 14.2.347.0; Tue, 10 Feb 2015 17:34:27 +0800 From: Josh Wu To: Guennadi Liakhovetski , Laurent Pinchart , Linux Media Mailing List CC: , , "Josh Wu" Subject: [PATCH v5 3/4] media: ov2640: add primary dt support Date: Tue, 10 Feb 2015 17:31:35 +0800 Message-ID: <1423560696-12304-4-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1423560696-12304-1-git-send-email-josh.wu@atmel.com> References: <1423560696-12304-1-git-send-email-josh.wu@atmel.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.2.10.92422 X-PMX-Spam: Gauge=IIIIIIIII, Probability=9%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, MSGID_ADDED_BY_MTA 0.05, BODY_SIZE_4000_4999 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, REFERENCES 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_MEDIA_BODY 0, __CP_URI_IN_BODY 0, __CT 0, __CT_TEXT_PLAIN 0, __DATE_TZ_HK 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __REFERENCES 0, __SANE_MSGID 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __URI_NO_WWW 0, __URI_NS ' Add device tree support for ov2640. In device tree, user needs to provide the master clock (xvclk). User can add the reset/pwdn pins if they have. Cc: devicetree@vger.kernel.org Signed-off-by: Josh Wu Acked-by: Laurent Pinchart --- Changes in v5: - change the 'mclk' to 'xvclk'. As v4l2-clk will handle the CCF xvclk and v4l2 master clock internally. Changes in v4: - modify the code comment. - Add Laurent's acked by. Changes in v3: - fix gpiod usage. - refine the ov2640_probe() function. Changes in v2: - use gpiod APIs. - change the gpio pin's name according to datasheet. - reduce the delay for .reset() function. drivers/media/i2c/soc_camera/ov2640.c | 90 ++++++++++++++++++++++++++++++++--- 1 file changed, 83 insertions(+), 7 deletions(-) diff --git a/drivers/media/i2c/soc_camera/ov2640.c b/drivers/media/i2c/soc_camera/ov2640.c index 057dd49..c70e9e7 100644 --- a/drivers/media/i2c/soc_camera/ov2640.c +++ b/drivers/media/i2c/soc_camera/ov2640.c @@ -18,6 +18,8 @@ #include #include #include +#include +#include #include #include @@ -283,6 +285,10 @@ struct ov2640_priv { u32 cfmt_code; struct v4l2_clk *clk; const struct ov2640_win_size *win; + + struct soc_camera_subdev_desc ssdd_dt; + struct gpio_desc *resetb_gpio; + struct gpio_desc *pwdn_gpio; }; /* @@ -1038,6 +1044,63 @@ static struct v4l2_subdev_ops ov2640_subdev_ops = { .video = &ov2640_subdev_video_ops, }; +/* OF probe functions */ +static int ov2640_hw_power(struct device *dev, int on) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ov2640_priv *priv = to_ov2640(client); + + dev_dbg(&client->dev, "%s: %s the camera\n", + __func__, on ? "ENABLE" : "DISABLE"); + + if (priv->pwdn_gpio) + gpiod_direction_output(priv->pwdn_gpio, !on); + + return 0; +} + +static int ov2640_hw_reset(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ov2640_priv *priv = to_ov2640(client); + + if (priv->resetb_gpio) { + /* Active the resetb pin to perform a reset pulse */ + gpiod_direction_output(priv->resetb_gpio, 1); + usleep_range(3000, 5000); + gpiod_direction_output(priv->resetb_gpio, 0); + } + + return 0; +} + +static int ov2640_probe_dt(struct i2c_client *client, + struct ov2640_priv *priv) +{ + /* Request the reset GPIO deasserted */ + priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb", + GPIOD_OUT_LOW); + if (!priv->resetb_gpio) + dev_dbg(&client->dev, "resetb gpio is not assigned!\n"); + else if (IS_ERR(priv->resetb_gpio)) + return PTR_ERR(priv->resetb_gpio); + + /* Request the power down GPIO asserted */ + priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn", + GPIOD_OUT_HIGH); + if (!priv->pwdn_gpio) + dev_dbg(&client->dev, "pwdn gpio is not assigned!\n"); + else if (IS_ERR(priv->pwdn_gpio)) + return PTR_ERR(priv->pwdn_gpio); + + /* Initialize the soc_camera_subdev_desc */ + priv->ssdd_dt.power = ov2640_hw_power; + priv->ssdd_dt.reset = ov2640_hw_reset; + client->dev.platform_data = &priv->ssdd_dt; + + return 0; +} + /* * i2c_driver functions */ @@ -1049,12 +1112,6 @@ static int ov2640_probe(struct i2c_client *client, struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); int ret; - if (!ssdd) { - dev_err(&adapter->dev, - "OV2640: Missing platform_data for driver\n"); - return -EINVAL; - } - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(&adapter->dev, "OV2640: I2C-Adapter doesn't support SMBUS\n"); @@ -1068,10 +1125,22 @@ static int ov2640_probe(struct i2c_client *client, return -ENOMEM; } - priv->clk = v4l2_clk_get(&client->dev, "mclk"); + priv->clk = v4l2_clk_get(&client->dev, "xvclk"); if (IS_ERR(priv->clk)) return -EPROBE_DEFER; + if (!ssdd && !client->dev.of_node) { + dev_err(&client->dev, "Missing platform_data for driver\n"); + ret = -EINVAL; + goto err_clk; + } + + if (!ssdd) { + ret = ov2640_probe_dt(client, priv); + if (ret) + goto err_clk; + } + v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops); v4l2_ctrl_handler_init(&priv->hdl, 2); v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops, @@ -1121,9 +1190,16 @@ static const struct i2c_device_id ov2640_id[] = { }; MODULE_DEVICE_TABLE(i2c, ov2640_id); +static const struct of_device_id ov2640_of_match[] = { + {.compatible = "ovti,ov2640", }, + {}, +}; +MODULE_DEVICE_TABLE(of, ov2640_of_match); + static struct i2c_driver ov2640_i2c_driver = { .driver = { .name = "ov2640", + .of_match_table = of_match_ptr(ov2640_of_match), }, .probe = ov2640_probe, .remove = ov2640_remove,