Re: [PATCH 38/38] iio: magn-core: st: Provide support for theLSM303DLH

[Lee Jones]

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 â Open source software for ARM SoCs
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