iio: ak8975: Fix calculation formula and add device name
Status from this message: Applied to the fixes-togreg branch of iio.git
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- v1 Latest posting 2/22 patches 3 repliesApplied
- v1 posting 1/22 patches 2 repliesSuperseded
Patches in v1 posting 2/2 Applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | iio: ak8975: Fix calculation formula for convert micro tesla to gauss unitdrivers/ | +9 | 2 replies | |
| 2/2 | iio: ak8975: Add device namedrivers/ | +1 | 1 reply |
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Cover letter [PATCH RESEND 0/2] iio: ak8975: Fix calculation formula and add device name
Three months ago Peter Meerwald revised description of device driver[1].
Correctly, device's sensitivity is 0.3 uT/LSB typ and One micro tesla equal 0.01 gauss[2]. So I have fixed calculation formula,And then add RAW_TO_GAUSS macro.
Scale are returned as VAL_INT_PLUS_MICRO.
Additionally, I have add device name.
Tested on exynos4412 board, with following result:
-sh-4.1# cat name
ak8975
-sh-4.1# cat in_magn_x_raw
80
-sh-4.1# cat in_magn_x_scale
0.003609
Calculate the result 80 x 0.003609 = 0.28872 Gauss. 0.28872 G equal 288.72 mG
I think this magnitude value is proper level[3].
[1] http://marc.info/?l=linux-iio&m=138220306822747&w=2
[2] http://en.wikipedia.org/wiki/Gauss_(unit)
[3] http://en.wikipedia.org/wiki/Orders_of_magnitude_(magnetic_field)
Beomho Seo (2):
iio: ak8975: Fix calculation formula for microtesla to gauss unit
iio: ak8975: Add device name
drivers/iio/magnetometer/ak8975.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-)
Signature · 1 line
Best Regards,