From patchwork Mon Jul 20 17:01:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 65688 X-Patchwork-Delegate: sakari.ailus@iki.fi Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1jxZ5f-0067Eb-Sz; Mon, 20 Jul 2020 16:56:36 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730363AbgGTRBf (ORCPT + 1 other); Mon, 20 Jul 2020 13:01:35 -0400 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:16145 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729853AbgGTRBd (ORCPT ); Mon, 20 Jul 2020 13:01:33 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 20 Jul 2020 10:00:31 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 20 Jul 2020 10:01:32 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 20 Jul 2020 10:01:32 -0700 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 20 Jul 2020 17:01:32 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 20 Jul 2020 17:01:31 +0000 Received: from skomatineni-linux.nvidia.com (Not Verified[10.2.168.236]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 20 Jul 2020 10:01:15 -0700 From: Sowjanya Komatineni To: , , , , , , , , , CC: , , Subject: [PATCH v3 3/3] media: i2c: imx274: Add IMX274 power on and off sequence Date: Mon, 20 Jul 2020 10:01:34 -0700 Message-ID: <1595264494-2400-3-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595264494-2400-1-git-send-email-skomatineni@nvidia.com> References: <1595264494-2400-1-git-send-email-skomatineni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595264431; bh=KB7QnqM5o08znb9+GqiI1fblg0wMl6CxYYe98APoApY=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=oPsRqpgIr1oc7D45YlF86Bwyac6wEaPRm2/oU6+V8/jf4ZOovvwQfDxJKRnZ1mqWK SOGt7gaaGZQSyzffHmjdogw9FoFdfvIp/aWZbo6tMwFTnh7oi9irtzltqof/YClJvQ HB349E6YDYCXImhTxy9/fX47LgTzTkmUtKjITUTKZLubdlRLdIS7Yu/yybNZOl9Ejx TxCADcpR4BLTiY2zsEZR9Q81VyGp1ti6+tHj6EdqPArD/tLOZ+CbZPOsbMRFqc+aV0 Zcl1dChkTyZgOfQ4W7IYXUVQLK/qxvzLhjjx3675OuGqNl+tHlBxVkaCKTHmIQ+wnK T18wOQ5wk6g2A== Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_HIGH=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no IMX274 has VANA analog 2.8V supply, VDIG digital core 1.8V supply, and VDDL digital io 1.2V supply which are optional based on camera module design. IMX274 also need external 24Mhz clock and is optional based on camera module design. This patch adds support for IMX274 power on and off to enable and disable these supplies and external clock. Signed-off-by: Sowjanya Komatineni Reviewed-by: Luca Ceresoli --- drivers/media/i2c/imx274.c | 132 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 129 insertions(+), 3 deletions(-) diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c index 55869ff..7157b1d 100644 --- a/drivers/media/i2c/imx274.c +++ b/drivers/media/i2c/imx274.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -131,6 +132,15 @@ #define IMX274_TABLE_WAIT_MS 0 #define IMX274_TABLE_END 1 +/* regulator supplies */ +static const char * const imx274_supply_names[] = { + "VDDL", /* IF (1.2V) supply */ + "VDIG", /* Digital Core (1.8V) supply */ + "VANA", /* Analog (2.8V) supply */ +}; + +#define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names) + /* * imx274 I2C operation related structure */ @@ -501,6 +511,8 @@ struct imx274_ctrls { * @frame_rate: V4L2 frame rate structure * @regmap: Pointer to regmap structure * @reset_gpio: Pointer to reset gpio + * @supplies: imx274 analog and digital supplies + * @inck: input clock to imx274 * @lock: Mutex structure * @mode: Parameters for the selected readout mode */ @@ -514,6 +526,8 @@ struct stimx274 { struct v4l2_fract frame_interval; struct regmap *regmap; struct gpio_desc *reset_gpio; + struct regulator *supplies[IMX274_NUM_SUPPLIES]; + struct clk *inck; struct mutex lock; /* mutex lock for operations */ const struct imx274_mode *mode; }; @@ -767,6 +781,99 @@ static void imx274_reset(struct stimx274 *priv, int rst) usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); } +/* + * imx274_power_on - Function called to power on the sensor + * @imx274: Pointer to device structure + */ +static int imx274_power_on(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct stimx274 *imx274 = to_imx274(sd); + int i, ret; + + ret = clk_prepare_enable(imx274->inck); + if (ret) { + dev_err(&imx274->client->dev, + "Failed to enable input clock: %d\n", ret); + return ret; + } + + for (i = 0; i < IMX274_NUM_SUPPLIES; i++) { + if (imx274->supplies[i]) { + ret = regulator_enable(imx274->supplies[i]); + if (ret < 0) { + dev_err(&imx274->client->dev, + "Failed to enable %s supply: %d\n", + imx274_supply_names[i], ret); + goto fail_reg; + } + } + } + + usleep_range(1, 2); + imx274_reset(imx274, 1); + + return 0; + +fail_reg: + for (--i; i >= 0; i--) { + if (imx274->supplies[i]) + regulator_disable(imx274->supplies[i]); + } + + clk_disable_unprepare(imx274->inck); + return ret; +} + +/* + * imx274_power_off - Function called to power off the sensor + * @imx274: Pointer to device structure + */ +static int imx274_power_off(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct stimx274 *imx274 = to_imx274(sd); + int i; + + imx274_reset(imx274, 0); + + for (i = 0; i < IMX274_NUM_SUPPLIES; i++) { + if (imx274->supplies[i]) + regulator_disable(imx274->supplies[i]); + } + + clk_disable_unprepare(imx274->inck); + + return 0; +} + +static int imx274_get_regulators(struct device *dev, struct stimx274 *imx274) +{ + int i, err; + const char *supply; + + for (i = 0; i < IMX274_NUM_SUPPLIES; i++) { + supply = imx274_supply_names[i]; + imx274->supplies[i] = devm_regulator_get_optional(dev, supply); + if (!IS_ERR(imx274->supplies[i])) + continue; + err = PTR_ERR(imx274->supplies[i]); + if (err != -ENODEV) { + if (err != -EPROBE_DEFER) + dev_err(&imx274->client->dev, + "Failed to get %s supply: %d\n", + supply, err); + return err; + } + + imx274->supplies[i] = NULL; + } + + return 0; +} + /** * imx274_s_ctrl - This is used to set the imx274 V4L2 controls * @ctrl: V4L2 control to be set @@ -1836,6 +1943,14 @@ static int imx274_probe(struct i2c_client *client) mutex_init(&imx274->lock); + imx274->inck = devm_clk_get_optional(&client->dev, "inck"); + ret = imx274_get_regulators(&client->dev, imx274); + if (ret) { + dev_err(&client->dev, + "Failed to get power regulators, err: %d\n", ret); + return ret; + } + /* initialize format */ imx274->mode = &imx274_modes[IMX274_DEFAULT_BINNING]; imx274->crop.width = IMX274_MAX_WIDTH; @@ -1883,15 +1998,23 @@ static int imx274_probe(struct i2c_client *client) goto err_me; } - /* pull sensor out of reset */ - imx274_reset(imx274, 1); + /* keep sensor in reset before power on */ + imx274_reset(imx274, 0); + + /* power on the sensor */ + ret = imx274_power_on(&client->dev); + if (ret < 0) { + dev_err(&client->dev, + "%s : imx274 power on failed\n", __func__); + goto err_me; + } /* initialize controls */ ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4); if (ret < 0) { dev_err(&client->dev, "%s : ctrl handler init Failed\n", __func__); - goto err_me; + goto err_power_off; } imx274->ctrls.handler.lock = &imx274->lock; @@ -1958,6 +2081,8 @@ static int imx274_probe(struct i2c_client *client) err_ctrls: v4l2_ctrl_handler_free(&imx274->ctrls.handler); +err_power_off: + imx274_power_off(&client->dev); err_me: media_entity_cleanup(&sd->entity); err_regmap: @@ -1975,6 +2100,7 @@ static int imx274_remove(struct i2c_client *client) v4l2_async_unregister_subdev(sd); v4l2_ctrl_handler_free(&imx274->ctrls.handler); + imx274_power_off(&client->dev); media_entity_cleanup(&sd->entity); mutex_destroy(&imx274->lock); return 0;