From b21d3f3452ec3a060c8f576a97adfdd4329b3157 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 29 Jun 2016 14:08:34 +0200 Subject: [PATCH] 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 Cc: Richard Leitner Cc: Krzysztof Kozlowski Cc: Lars-Peter Clausen Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron --- drivers/iio/magnetometer/ak8975.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c index def693cf7c7a..ca69f8da4eef 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. */ @@ -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); } -- GitLab