Re: [PATCH] spi: spi-fsl-dspi: Add ACPI support

[Vladimir Oltean <olteanv@xxxxxxxxx>]

On Wed, Aug 26, 2020 at 03:23:12PM +0100, Mark Brown wrote:
> On Wed, Aug 26, 2020 at 02:47:58PM +0300, Vladimir Oltean wrote:
> 
> > - The compatible string plays an integral part in the functionality of
> >   the spi-fsl-dspi driver. I want to see a solution for ACPI where the
> >   driver knows on which SoC it's running on. Otherwise it doesn't know
> >   what are the silicon parameters of the DSPI module (XSPI present or
> >   not, DMA present or not, FIFO depth). I don't see that now. I just see
> >   something hardcoded for:
> >   { "NXP0005", .driver_data = (kernel_ulong_t)&devtype_data[LS2085A], }
> 
> Based on some other stuff I've seen with ACPI on NXP stuff it looks like
> they're following the same scheme but only caring about that one SoC for
> the time being.

So, no argument about caring only about ACPI on one particular SoC for
the time being, but there's a big difference between a solution that
works for N=1 and one that works for N=2...

Showing my ignorance here, but is there something equivalent to
of_machine_is_compatible() for ACPI?

Thanks,
-Vladimir