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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: E62D80YVdudl5epJdX3hx+I5LdT1RrctH1CihqCkVSwtv9oU/g2UVUuL1ZP6RqL0juXL1d3y5Afkdwd9d602cBJfy0Dt2/Njr7BvHJl1kmuBMDtQ1phdDJHKKuRPZYqQcktwCnERDufgjxuGuhspW20Fl3U8dk/wJzIGH1IeS2s+Ujn5cihXsSq51lk/P3LfKN57l05XOh7XYpXEACyl/CKA+yyt6LwWDTAHRDc6mvKntx9CfNH8f/GgePdKlYRXsf8c7I2IxMP1pVJmbSke94PJ9vIojo+LpiyFLEXZNpa6crG4VlmHah2HL2xUdYZ6 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: f88e5839-0aa0-49dd-9d86-08d668a26023 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Dec 2018 06:46:32.8785 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0402MB3641 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 controllable 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 vcc regulator operation support. Signed-off-by: Anson Huang --- ChangeLog Since V7: - move devm_add_action to before devm_regmap_init_i2c call to save code= of disabling regulator; - simply the error check logic in isl29018_suspend. --- drivers/iio/light/isl29018.c | 47 ++++++++++++++++++++++++++++++++++++++++= +++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c index b45400f..ec6ce89 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, @@ -708,6 +710,16 @@ static const char *isl29018_match_acpi_device(struct d= evice *dev, int *data) return dev_name(dev); } =20 +static void isl29018_disable_regulator_action(void *_data) +{ + struct isl29018_chip *chip =3D _data; + int err; + + err =3D regulator_disable(chip->vcc_reg); + if (err) + pr_err("failed to disable isl29018's VCC regulator!\n"); +} + static int isl29018_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -742,6 +754,28 @@ static int isl29018_probe(struct i2c_client *client, chip->scale =3D isl29018_scales[chip->int_time][0]; chip->suspended =3D false; =20 + chip->vcc_reg =3D devm_regulator_get(&client->dev, "vcc"); + if (IS_ERR(chip->vcc_reg)) { + err =3D PTR_ERR(chip->vcc_reg); + if (err !=3D -EPROBE_DEFER) + dev_err(&client->dev, "failed to get VCC regulator!\n"); + return err; + } + + err =3D regulator_enable(chip->vcc_reg); + if (err) { + dev_err(&client->dev, "failed to enable VCC regulator!\n"); + return err; + } + + err =3D devm_add_action(&client->dev, isl29018_disable_regulator_action, + chip); + if (err) { + isl29018_disable_regulator_action(chip); + dev_err(&client->dev, "failed to setup regulator cleanup action!\n"); + return err; + } + chip->regmap =3D devm_regmap_init_i2c(client, isl29018_chip_info_tbl[dev_id].regmap_cfg); if (IS_ERR(chip->regmap)) { @@ -768,6 +802,7 @@ 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 @@ -777,10 +812,13 @@ static int isl29018_suspend(struct device *dev) * So we do not have much to do here. */ chip->suspended =3D true; + ret =3D regulator_disable(chip->vcc_reg); + if (ret) + dev_err(dev, "failed to disable VCC regulator\n"); =20 mutex_unlock(&chip->lock); =20 - return 0; + return ret; } =20 static int isl29018_resume(struct device *dev) @@ -790,6 +828,13 @@ static int isl29018_resume(struct device *dev) =20 mutex_lock(&chip->lock); =20 + err =3D regulator_enable(chip->vcc_reg); + if (err) { + dev_err(dev, "failed to enable VCC regulator\n"); + mutex_unlock(&chip->lock); + return err; + } + err =3D isl29018_chip_init(chip); if (!err) chip->suspended =3D false; --=20 2.7.4