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iio: Correct description how to convert microtesla to gauss 

this just fixes the comment; however, I'm not sure if the driver reports
measurements correctly; the raw values are 0.3 uT / LSB; IIO is supposed
to report magnetic fields in Gauss, so the scale should be around 1/300
(ignoring ASA) -- but value and scale are returned as VAL_INT

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2013-10-19 18:17:00 +01:00 committed by Jonathan Cameron
parent 207287595b
commit eb03610a9c
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/magnetometer/ak8975.c
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@ -263,7 +263,7 @@ static int ak8975_setup(struct i2c_client *client)
*
* HuT = H * 1229/4096, or roughly, 3/10.
*
* Since 1uT = 100 gauss, our final scale factor becomes:
* Since 1uT = 0.01 gauss, our final scale factor becomes:
*
* Hadj = H * ((ASA + 128) / 256) * 3/10 * 100
* Hadj = H * ((ASA + 128) * 30 / 256