linux-kernel - Re: [PATCH] i2c: slave-eeprom: Add an OF device ID table

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Message-ID: <20170814195236.4miomp2omul5qikt@ninjato>
Date:   Mon, 14 Aug 2017 21:52:36 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Luis Oliveira <Luis.Oliveira@...opsys.com>,
        linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: slave-eeprom: Add an OF device ID table

On Wed, Aug 09, 2017 at 12:12:56PM +0200, Javier Martinez Canillas wrote:
> The driver doesn't have a struct of_device_id table but supported devices
> are registered via Device Trees as shown in the following DT binding doc:
> 
> Documentation/devicetree/bindings/i2c/i2c-designware.txt

Uhhh, that needs to be fixed to something else! I don't think i2c slave
functionality should be described in DT. The slave functionality is pure
software, so IMO it doesn't match the "HW description" requirement.

> But this works on the assumption that a I2C device registered via OF will
> always match a legacy I2C device ID and that the MODALIAS reported will
> always be of the form i2c:<device>.
> 
> And this could change in the future so the correct approach is to have an
> OF device ID table if the devices are registered via OF.
> 
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>

Thanks for finding the issue, still NAK to this patch. Are you
interested in updating the docs?


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