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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: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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1 changed files with 15 additions and 0 deletions
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@ -379,6 +379,7 @@ struct ak8975_data {
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u8 cntl_cache;
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struct iio_mount_matrix orientation;
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struct regulator *vdd;
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struct regulator *vid;
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};
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/* Enable attached power regulator if any. */
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@ -399,6 +400,19 @@ static int ak8975_power_on(struct i2c_client *client)
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"Failed to enable specified Vdd supply\n");
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return ret;
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}
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data->vid = devm_regulator_get(&client->dev, "vid");
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if (IS_ERR(data->vid)) {
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ret = PTR_ERR(data->vid);
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} else {
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ret = regulator_enable(data->vid);
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}
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if (ret) {
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dev_warn(&client->dev,
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"Failed to enable specified Vid supply\n");
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return ret;
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}
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return 0;
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}
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/* Disable attached power regulator if any. */
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@ -407,6 +421,7 @@ static void ak8975_power_off(const struct i2c_client *client)
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const struct iio_dev *indio_dev = i2c_get_clientdata(client);
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const struct ak8975_data *data = iio_priv(indio_dev);
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regulator_disable(data->vid);
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regulator_disable(data->vdd);
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}
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