linux-kernel - Re: [PATCH] i2c: Add generic support passing secondary devices addresses

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Date:	Sun, 21 Sep 2014 19:49:04 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	mark.rutland@....com
Subject: Re: [PATCH] i2c: Add generic support passing secondary devices
 addresses


> >This raises the first question for me: Are the additional addresses
> >configurable? Sadly, I can't find good documentation for the adv7604.
> >Otherwise, if I know I have a adv7604 and know its addresses, this
> >information should go into the driver and not the DT.
> >
> 
> They are. The current driver hard codes the other addresses, but that's not
> working when you have multiple adv7604s on the same I2C bus.

How is this configured? I can't imagine every address has its own
setting, but rather some 1-3 pins which select a certain block of
addresses?


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