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

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Message-ID: <20200824112505.GD4676@sirena.org.uk>
Date:   Mon, 24 Aug 2020 12:25:05 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Kuldip Dwivedi <kuldip.dwivedi@...esoftware.com>,
        linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Qiang Zhao <qiang.zhao@....com>,
        Pankaj Bansal <pankaj.bansal@....com>,
        Varun Sethi <V.Sethi@....com>,
        Tanveer Alam <tanveer.alam@...esoftware.com>
Subject: Re: [PATCH] spi: spi-fsl-dspi: Add ACPI support

On Sat, Aug 22, 2020 at 06:21:18PM +0300, Vladimir Oltean wrote:
> On Sat, Aug 22, 2020 at 07:37:25PM +0530, Kuldip Dwivedi wrote:

> > > The whole point with the device property API is that it works with
> > > both DT and ACPI without needing separate parsing, though in this
> > > case I'm wondering why we'd need to specify this in an ACPI system
> > > at all?

> > Understood. Will take care in v2 PATCH

> IMO there is zero reason for the existence of the "spi-num-chipselects"
> property even for DT. We should deprecate it (start ignoring it in
> existing device tree deployments) and populate struct
> fsl_dspi_devtype_data with that info based on SoC compatible string.

Yes, it's a legacy from bad board file conversions and shouldn't be used
at all.

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