Commit 040f3e58 authored Jun 06, 2012 by Leed Aguilar Committed by Greg Kroah-Hartman Jun 07, 2012

staging:iio:magnetometer:ak8975: set power-down mode after reading fuse ROM data



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.

Signed-off-by: Leed Aguilar <leed.aguilar@ti.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 74dcd439

drivers/staging/iio/magnetometer/ak8975.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -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.