linux-kernel - Re: [PATCH 1/4] of/device: Add a way to probe drivers by match data

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Message-ID: <CAL_JsqLvKWcJUYDyWOg3rMeEWv7JV4zw7-YkOUWiL5rfXgVRvQ@mail.gmail.com>
Date:   Tue, 6 Nov 2018 14:44:52 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH 1/4] of/device: Add a way to probe drivers by match data

On Tue, Nov 6, 2018 at 12:36 PM Stephen Boyd <sboyd@...nel.org> wrote:
>
> We have a handful of clk drivers that have a collection of slightly
> variant device support keyed off of the compatible string. In each of
> these drivers, we demux the variant and then call the "real" probe
> function based on whatever is stored in the match data for that
> compatible string. Let's generalize this function so that it can be
> re-used as the platform_driver probe function directly.

This looks really hacky to me. It sounds kind of general, but really
only works if we have match data that's a single function and we lose
any type checking on the function. What about things other than
platform devices?

Rob