linux-kernel - Re: [PATCH v1 2/3] auxdisplay: ht16k33: Make use of device_get_match

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Date:   Thu, 23 Feb 2023 13:53:15 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Robin van der Gracht <robin@...tonic.nl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Raul E Rangel <rrangel@...omium.org>,
        Wolfram Sang <wsa@...nel.org>, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-usb@...r.kernel.org,
        Miguel Ojeda <ojeda@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v1 2/3] auxdisplay: ht16k33: Make use of
 device_get_match_data()

On Thu, Feb 23, 2023 at 10:55:15AM +0100, Geert Uytterhoeven wrote:
> On Wed, Feb 22, 2023 at 8:21 PM Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > On Wed, Feb 22, 2023 at 07:46:25PM +0100, Krzysztof Kozlowski wrote:

...

> > I.o.w. the part after comma in the compatible strings of the I²C devices must
> > be unique globally to make that enumeration disambiguous.
> 
> Which is not unique to this driver?
> I bet you can find other compatible values that become non-unique
> after stripping the manufacturer.

Yes, exactly my point.
So this all schema is error prone. Hence I would not rely on it at all.


-- 
With Best Regards,
Andy Shevchenko