Re: [PATCH] iio: magnetometer: si7210: fix magnetic field measurement scale

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On Mon, 3 Feb 2025 11:26:27 +0200
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:

> On Sun, Feb 02, 2025 at 11:07:10AM +0100, Antoni Pokusinski wrote:
> > Applying the current scale value to the raw magnetic field measurements
> > gives the result in mT.
> > 
> > Fix the scale by increasing it 10 times, so that the final result after
> > applying the scale is in Gauss.  
> 
> No objections against this change, just wondering since these are
> the ABI changes (correct?) how should we really handle them in case
> some of the user space stuff already relies on 'bad' values?
> 
If it's broken wrt to the published ABI (and hence what other sensors
are exporting) then not a whole lot we can do other than
backport the fix.  This is one of the few cases where ABI backwards
compatibility comes second :(

Jonathan






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