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Date:	Sat, 3 May 2014 19:17:26 -0400
From:	Greg KH <>
To:	Tomasz Stanislawski <>
Subject: Re: [PATCH 0/2] Add support for sii9234 chip

On Fri, Apr 11, 2014 at 01:48:28PM +0200, Tomasz Stanislawski wrote:
> Hi everyone,
> This patchset adds support for sii9234 HD Mobile Link Bridge.  The chip is used
> to convert HDMI signal into MHL.  The driver enables HDMI output on Trats and
> Trats2 boards.
> The code is based on the driver [1] developed by:
>        Adam Hampson <>
>        Erik Gilling <>
> with additional contributions from:
>        Shankar Bandal <>
>        Dharam Kumar <>
> The drivers architecture was greatly simplified and transformed into a form
> accepted (hopefully) by opensource community.  The main differences from
> original code are:
> * using single I2C client instead of 4 subclients
> * remove all logic non-related to establishing HDMI link
> * simplify error handling
> * rewrite state machine in interrupt handler
> * wakeup and discovery triggered by an extcon event
> * integrate with Device Tree
> For now, the driver is added to drivers/misc/ directory because it has neigher
> userspace nor kernel interface.  The chip is capable of receiving and
> processing CEC events, so the driver may export an input device in /dev/ in the
> future.  However CEC could be also handled by HDMI driver.
> I kindly ask for suggestions about the best location for this driver.

It really is an extcon driver, so why not put it in drivers/extcon?  And
that might solve any build issues you have if you don't select extcon in
your .config file and try to build this code :)


greg k-h
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