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@xxxxxxxxxx>
Cc: Richard Leitner <dev@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v2->v3:
- Rebase and rewrite on top of the patch fixing up the regulator
usage.
ChangeLog v1->v2:
- Just obtain the other regulator exactly like the first without
trying to be fancy.
---
drivers/iio/magnetometer/ak8975.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index bc0770205b2d..62f73d9d38b4 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -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. */
@@ -400,6 +401,18 @@ static int ak8975_power_on(struct i2c_client *client)
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. */
@@ -408,6 +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);
}
--
2.4.11
--
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