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Commit b21d3f34 authored by Linus Walleij's avatar Linus Walleij Committed by Jonathan Cameron
Browse files

iio: magn: ak8975: add Vid regulator 



The AK8975 has two power sources: Vdd (analog voltage supply)
and Vid (digital voltage supply). Optionally also obtain the Vid
supply regulator and enable it.

If an error occurs when enabling one of the regulators: bail out.

Cc: Gregor Boirie <gregor.boirie@parrot.com>
Cc: Richard Leitner <dev@g0hl1n.net>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 90e96fdd

drivers/iio/magnetometer/ak8975.c

+15 −0
Original line number Diff line number Diff line
@@ -379,6 +379,7 @@ struct ak8975_data { 
	u8			cntl_cache;

	struct iio_mount_matrix orientation;

	struct regulator	*vdd;

	struct regulator	*vid;

};



/* Enable attached power regulator if any. */
@@ -399,6 +400,19 @@ static int ak8975_power_on(struct i2c_client *client) 
			 "Failed to enable specified Vdd supply\n");

		return ret;

	}



	data->vid = devm_regulator_get(&client->dev, "vid");

	if (IS_ERR(data->vid)) {

		ret = PTR_ERR(data->vid);

	} else {

		ret = regulator_enable(data->vid);

	}

	if (ret) {

		dev_warn(&client->dev,

			 "Failed to enable specified Vid supply\n");

		return ret;

	}

	return 0;

}



/* Disable attached power regulator if any. */
@@ -407,6 +421,7 @@ static void ak8975_power_off(const struct i2c_client *client) 
	const struct iio_dev *indio_dev = i2c_get_clientdata(client);

	const struct ak8975_data *data = iio_priv(indio_dev);



	regulator_disable(data->vid);

	regulator_disable(data->vdd);

}