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Thu, 6 Dec 2018 03:15:48 +0000 Received: from DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::adf8:f49d:deb4:58fd]) by DB3PR0402MB3916.eurprd04.prod.outlook.com ([fe80::adf8:f49d:deb4:58fd%3]) with mapi id 15.20.1382.023; Thu, 6 Dec 2018 03:15:48 +0000 From: Anson Huang To: "jic23@kernel.org" , "knaack.h@gmx.de" , "lars@metafoo.de" , "pmeerw@pmeerw.net" , "linux-iio@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: dl-linux-imx Subject: [PATCH] iio: light: isl29018: add optional vcc regulator operation support Thread-Topic: [PATCH] iio: light: isl29018: add optional vcc regulator operation support Thread-Index: AQHUjRH8CfSZy5OH8ESc4x40JN2bLA== Date: Thu, 6 Dec 2018 03:15:48 +0000 Message-ID: <1544065798-4465-1-git-send-email-Anson.Huang@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK0PR03CA0066.apcprd03.prod.outlook.com (2603:1096:203:52::30) To DB3PR0402MB3916.eurprd04.prod.outlook.com (2603:10a6:8:10::18) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.66] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DB3PR0402MB3802;6:jTSiKxhVFLoHkbEYlhNmJL0v9oyhEF7zglN4zZq6jTUUhQluW/IVHJcOtcsOwLUevDHg2BTKDa8zTMJxFX676PjDplCpOmQtnvbTWIhrU04iF5QrD332S7FNwrbXvo6YkIDVYiESpUQCXPLYetdPw5nInWaA9845kR+uXSILb3vTronQOgQeJ85aylZo9qDAOXp0fxsnjiivxFUhQOChdNHjYlIOuhMcf2L+cnJrSfd+QySzi48AHezGTT83tGjgyXRMf+698WYPdai3MpWrAIl0gg/5Yi2betB9ZpdHBbCpeuIuZn5to8p2y1wjQ6c9+OZc44oLr/4QbVMYjWALXTasC0vcM9qVvWD0zr73htDAsHjUJwG8RpIQm0GA3A/w/ISt1N7ZcpV1mnXwCiMl58zKOWOv0PNyLFS7I46fXlt5MBQAuLrohZo1/UqReQHuR9H8UKzm62SVKPqfvGRKOA==;5:k/pngTcP5uUD25POHgm8QwUs0wcca2hO1VUI8EH2ykQPNbQmiWwysyMov0VmeI0C5CEHjkFwIpnwHQvatFFHrFuM+waxusGdrGFdQK5PW/eW3L7SMu6/7hIeei58ln9BT+34HECyVjXVL6etMLcMlVbfcyodnN8O6GIaqEIOMu0=;7:qXbnwVZwptFODwKTPVckhEIeJCQPwnOiS+vES0sX7lw7oyXFGilg6f041A4hGSPINl9/tpBDuWnr682w33FbeVegNEs3B+2fWkRRtNvTUx322aeBekhtwOPfJHForPj/j46Of4XmoWodfnSh0MQWZg== x-ms-office365-filtering-correlation-id: ec8c6f82-d50c-4b89-061c-08d65b291e71 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390098)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7153060)(7193020);SRVR:DB3PR0402MB3802; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: 1D/3SLyDLMe1KnQS5v0fQp4+6sXLH6IpIVBpv5XR+qJLegNGh+osVYNHXopCfVPMKEhdQKbqOwhzL0Xtrt1KuCAlEp9KL0EXT0nfBO3nrQchrCSaBTG7FP2135ELcvk1Gt3bGtmnHgElezWTM4Aq8HR/lLtqqx6DoCBvcTa+CWzjOL72xADWBxmlvbZddCfLy9LttbDvVH1ZDsG5cAnuKbD9erppxQTwKD7qZskidGVFCXeqAxR7DUhzcm7CGc4QnnJQhLkKJ06AoZSF8WRhF3DuvryChQMGbl92CbnodGAX19Snof9qrx+zSpAKSzmDTchX+1GaSHangag3pHqq6bYkfpBLlAvaN30KScjnOfU= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: ec8c6f82-d50c-4b89-061c-08d65b291e71 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Dec 2018 03:15:48.5476 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3802 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The light sensor's power supply could be controlled by regulator on some platforms, such as i.MX6Q-SABRESD board, the light sensor isl29023's power supply is controlled by a GPIO fixed regulator, need to make sure the regulator is enabled before any operation of sensor, this patch adds optional vcc regulator operation support. Signed-off-by: Anson Huang --- drivers/iio/light/isl29018.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c index b45400f..47a55c8 100644 --- a/drivers/iio/light/isl29018.c +++ b/drivers/iio/light/isl29018.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -95,6 +96,7 @@ struct isl29018_chip { struct isl29018_scale scale; int prox_scheme; bool suspended; + struct regulator *vcc_reg; }; =20 static int isl29018_set_integration_time(struct isl29018_chip *chip, @@ -735,6 +737,15 @@ static int isl29018_probe(struct i2c_client *client, =20 mutex_init(&chip->lock); =20 + chip->vcc_reg =3D devm_regulator_get_optional(&client->dev, "vcc"); + if (!IS_ERR(chip->vcc_reg)) { + err =3D regulator_enable(chip->vcc_reg); + if (err) { + dev_err(&client->dev, "failed to enable VDD regulator\n"); + return err; + } + } + chip->type =3D dev_id; chip->calibscale =3D 1; chip->ucalibscale =3D 0; @@ -768,6 +779,7 @@ static int isl29018_probe(struct i2c_client *client, static int isl29018_suspend(struct device *dev) { struct isl29018_chip *chip =3D iio_priv(dev_get_drvdata(dev)); + int ret; =20 mutex_lock(&chip->lock); =20 @@ -777,6 +789,14 @@ static int isl29018_suspend(struct device *dev) * So we do not have much to do here. */ chip->suspended =3D true; + if (!IS_ERR(chip->vcc_reg)) { + ret =3D regulator_disable(chip->vcc_reg); + if (ret) { + dev_err(dev, "failed to disable VDD regulator\n"); + mutex_unlock(&chip->lock); + return ret; + } + } =20 mutex_unlock(&chip->lock); =20 @@ -790,6 +810,15 @@ static int isl29018_resume(struct device *dev) =20 mutex_lock(&chip->lock); =20 + if (!IS_ERR(chip->vcc_reg)) { + err =3D regulator_enable(chip->vcc_reg); + if (err) { + dev_err(dev, "failed to enable VDD regulator\n"); + mutex_unlock(&chip->lock); + return err; + } + } + err =3D isl29018_chip_init(chip); if (!err) chip->suspended =3D false; --=20 2.7.4