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

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Message-ID: <20200826204109.GT4965@sirena.org.uk>
Date:   Wed, 26 Aug 2020 21:41:09 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        kuldip dwivedi <kuldip.dwivedi@...esoftware.com>,
        linux-spi <linux-spi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Qiang Zhao <qiang.zhao@....com>,
        Pankaj Bansal <pankaj.bansal@....com>,
        Varun Sethi <V.Sethi@....com>,
        tanveer <tanveer.alam@...esoftware.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH] spi: spi-fsl-dspi: Add ACPI support

On Wed, Aug 26, 2020 at 10:56:49PM +0300, Vladimir Oltean wrote:
> On Wed, Aug 26, 2020 at 10:36:15PM +0300, Andy Shevchenko wrote:

> > FIFO size can be read from the property

> My personal preference is for the driver to hold the expert information
> about the hardware parameters, and not the device tree. Today you need
> to know only about this set of parameters, tomorrow you need something
> new, but you also need to work with old DT blobs... It's a mess.

I strongly agree, it is much better to just know what the hardware is
and set any properties based off that so we don't need to update
firmwares to take advantage of additional features or fix quirks that
are discovered.

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