linux-kernel - Re: [RESEND PATCH 5/7] extcon: Export OF module alias information in missing drivers

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Message-id: <55E7CC61.4020407@samsung.com>
Date:	Thu, 03 Sep 2015 13:28:17 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-kernel@...r.kernel.org
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: Re: [RESEND PATCH 5/7] extcon: Export OF module alias information in
 missing drivers

On 2015년 08월 25일 15:31, Javier Martinez Canillas wrote:
> The I2C core always reports the MODALIAS uevent as "i2c:<modalias>"
> regardless of the mechanism that was used to register the device
> (i.e: OF or board code) and the table that is used later to match
> the driver with the device (i.e: I2C id table or OF match table).
> 
> So drivers needs to export the I2C id table and this be built into
> the module or udev won't have the necessary information to autoload
> the needed driver module when the device is added.
> 
> But this means that OF-only drivers needs to have both OF and I2C id
> tables that have to be kept in sync and also the dev node compatible
> manufacturer prefix is stripped when reporting the MODALIAS. Which can
> lead to issues if two vendors use the same I2C device name for example.
> 
> To avoid the above, the I2C core behavior may be changed in the future
> to not require an SPI device table for OF-only drivers and report the
> OF module alias. So, it's better to also export the OF table even when
> is unused now to prevent breaking module loading when the core changes.
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> 
>  drivers/extcon/extcon-rt8973a.c | 1 +
>  drivers/extcon/extcon-sm5502.c  | 1 +
>  2 files changed, 2 insertions(+)

Applied it.

Thanks,
Chanwoo Choi

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