From patchwork Mon Dec 8 11:29:05 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 5455631 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BFA23BEEA8 for ; Mon, 8 Dec 2014 11:33:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D6BEA20166 for ; Mon, 8 Dec 2014 11:33:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C2E23200FE for ; Mon, 8 Dec 2014 11:33:16 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XxwWx-0002iE-JJ; Mon, 08 Dec 2014 11:31:07 +0000 Received: from eusmtp01.atmel.com ([212.144.249.242]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XxwWk-0002TN-Jb for linux-arm-kernel@lists.infradead.org; Mon, 08 Dec 2014 11:30:55 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.161.101.30) with Microsoft SMTP Server id 14.2.347.0; Mon, 8 Dec 2014 12:30:30 +0100 Received: from melon.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Mon, 8 Dec 2014 19:31:42 +0800 From: Josh Wu To: , Subject: [PATCH 3/5] media: ov2640: add primary dt support Date: Mon, 8 Dec 2014 19:29:05 +0800 Message-ID: <1418038147-13221-4-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1418038147-13221-1-git-send-email-josh.wu@atmel.com> References: <1418038147-13221-1-git-send-email-josh.wu@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141208_033054_997960_64778A13 X-CRM114-Status: GOOD ( 14.48 ) X-Spam-Score: -0.0 (/) Cc: Josh Wu , devicetree@vger.kernel.org, g.liakhovetski@gmx.de, linux-arm-kernel@lists.infradead.org, m.chehab@samsung.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add device tree support for ov2640. Cc: devicetree@vger.kernel.org Signed-off-by: Josh Wu --- v1 -> v2: 1. use gpiod APIs. 2. change the gpio pin's name according to datasheet. 3. reduce the delay for .reset() function. drivers/media/i2c/soc_camera/ov2640.c | 86 ++++++++++++++++++++++++++++++++--- 1 file changed, 80 insertions(+), 6 deletions(-) diff --git a/drivers/media/i2c/soc_camera/ov2640.c b/drivers/media/i2c/soc_camera/ov2640.c index 9ee910d..2a57979 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; }; /* @@ -1047,6 +1053,61 @@ 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 && !IS_ERR(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 enabled, give a reset impulse */ + if (priv->resetb_gpio && !IS_ERR(priv->resetb_gpio)) { + gpiod_direction_output(priv->resetb_gpio, 0); + usleep_range(3000, 5000); + gpiod_direction_output(priv->resetb_gpio, 1); + } + + return 0; +} + +static int ov2640_probe_dt(struct i2c_client *client, + struct ov2640_priv *priv) +{ + priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb", + GPIOD_OUT_HIGH); + if (!priv->resetb_gpio) + dev_warn(&client->dev, "resetb gpio not found!\n"); + else if (IS_ERR(priv->resetb_gpio)) + return -EINVAL; + + priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn", + GPIOD_OUT_HIGH); + if (!priv->pwdn_gpio) + dev_warn(&client->dev, "pwdn gpio not found!\n"); + else if (IS_ERR(priv->pwdn_gpio)) + return -EINVAL; + + /* 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 */ @@ -1058,12 +1119,6 @@ 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"); @@ -1077,6 +1132,18 @@ static int ov2640_probe(struct i2c_client *client, return -ENOMEM; } + if (!ssdd) { + if (client->dev.of_node) { + ret = ov2640_probe_dt(client, priv); + if (ret) + return ret; + } else { + dev_err(&client->dev, + "Missing platform_data for driver\n"); + return -EINVAL; + } + } + 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, @@ -1123,9 +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,