linux-kernel - Re: [PATCH] driver/i2c/mux: Add register based mux i2c-mux-reg

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Date:	Wed, 17 Jun 2015 10:54:04 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	York Sun <yorksun@...escale.com>
Cc:	wsa@...-dreams.de, linux-kernel@...r.kernel.org,
	linux-i2c@...r.kernel.org,
	Peter Korsgaard <peter.korsgaard@...co.com>
Subject: Re: [PATCH] driver/i2c/mux: Add register based mux i2c-mux-reg

A nit and a question follow.

On Tue, 2015-06-16 at 10:28 -0700, York Sun wrote:
> --- /dev/null
> +++ b/drivers/i2c/muxes/i2c-mux-reg.c

> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.

This states the license is GPL v2.

> +MODULE_LICENSE("GPL");

According to include/linux/module.h this sates the license is GPL v2 or
later. So I think that either the comment at the top of this file or the
ident used in the MODULE_LICENSE() macro needs to change.

> +MODULE_ALIAS("platform:i2c-mux-reg");

As far as I understand it, this alias is only useful if there's a
corresponding struct platform_device, somewhere. Ie, this alias needs a
platform_device that will fire of a "MODALIAS=platform:i2c-mux-reg"
uevent when it's created. (I don't know exactly how all that works, so
I'm handwaving quite a bit here.) That would be platform_device with a
"i2c-mux-reg" name.

Did I get this right? Because then I think this MODULE_ALIAS() isn't
needed, as I couldn't find such a corresponding platform_device.

Thanks,

Paul Bolle

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