Re: [PATCH 2/2] iio:magnetometer: Support for ST magnetic sensors

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On Sat, Mar 6, 2021 at 6:44 PM Jonathan Cameron <jic23@xxxxxxxxxx> wrote:
> On Fri,  5 Mar 2021 07:05:36 +0000
> LI Qingwu <Qing-wu.Li@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > Add support for STMicroelectronics digital magnetic sensors,
> > LSM303AH,LSM303AGR,LIS2MDL,ISM303DAC,IIS2MDC.
> >
> > The patch tested with IIS2MDC instrument.
> >
> > Signed-off-by: LI Qingwu <Qing-wu.Li@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi,
>
> Given that at least two parts in here is supported by the existing
> driver in
> iio/magnetometers/st_magn_*.c (lsm303agr) can you confirm that it
> doesn't make sense to simply extend that driver to support the
> other parts?  This is particularly true when the WHO AM I register
> reads 0x40 for all these parts.
>
> I've done a fairly superficial review whilst here, but please check
> you can't just add the relevant entries to the existing driver.

I even hadn't looked into the code because this one needs a very good
justification why it's a new driver rather than extension of the
existing one.

-- 
With Best Regards,
Andy Shevchenko



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