Fuse ROM data access mode is the only mode which does not
transition to power-down mode automatically.
As per the AK8975 data sheet, it is recomended to set the
power-down mode first before attempting to change into
another mode.
Change-Id: I4013c7963b19b3fe4b67553521b1083f018507bb
Signed-off-by: Leed Aguilar <leed.aguilar@xxxxxx>
Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/staging/iio/magnetometer/ak8975.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index 52833cd..b06bd2d 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -194,6 +194,17 @@ static int ak8975_setup(struct i2c_client *client)
return ret;
}
+ /* After reading fuse ROM data set power-down mode */
+ ret = ak8975_write_data(client,
+ AK8975_REG_CNTL,
+ AK8975_REG_CNTL_MODE_POWER_DOWN,
+ AK8975_REG_CNTL_MODE_MASK,
+ AK8975_REG_CNTL_MODE_SHIFT);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in setting power-down mode\n");
+ return ret;
+ }
+
/*
* Precalculate scale factor (in Gauss units) for each axis and
* store in the device data.
--
1.7.1
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