[PATCH 38/38] iio: magn-core: st: Provide support for the LSM303DLH

Lee Jones
2013-09-16T10:08:09Z

On Mon, 16 Sep 2013, Denis CIOCCA wrote:

> Hi Lee,
> > index 12e7e79..b2e2917 100644
> > --- a/drivers/iio/magnetometer/st_magn_core.c
> > +++ b/drivers/iio/magnetometer/st_magn_core.c
> > @@ -151,7 +151,8 @@ static const struct st_sensors st_magn_sensors[] = {
> > .wai = ST_MAGN_1_WAI_EXP,
> > .sensors_supported = {
> > [0] = LSM303DLHC_MAGN_DEV_NAME,
> > - [1] = LSM303DLM_MAGN_DEV_NAME,
> > + [1] = LSM303DLH_MAGN_DEV_NAME,
> > + [0] = LSM303DLM_MAGN_DEV_NAME,
> Are you sure that it works?

Well I have tested it working.

> Because LSM303DLH magnetometer use different kind of WAI registers. This
> driver read 0x0f and in this case the value is 0 and the driver do not
> probe...You have to read the identification registers (0x0a, 0x0b, 0x0c)
> in that case.

The driver mentions that the first group of sensors have a WAI of 0x3c:

#define ST_MAGN_1_WAI_EXP 0x3c

And when I print out the WAI read from the device:

Requested device: lsm303dlh_magn - read WAI: 0x3c

I guess I could have been lied to again by the board's datasheet again
and the attached device isn't actually a LSM303DLH, but how can I tell
for sure?

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
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