linux-kernel - Re: Device tree conversion of spi device vs. controller

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Date:	Thu, 12 Apr 2012 21:29:44 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Roland Stigge <stigge@...com.de>
Cc:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: Device tree conversion of spi device vs. controller_data

On Sun, 08 Apr 2012 12:24:50 +0200, Roland Stigge <stigge@...com.de> wrote:
> Hi,
> 
> upon DT conversion of LPC32xx, I came across the at25 spi eeprom which
> needs .controller_data in struct spi_board_info for slave registration
> via spi_register_board_info() (non-DT-case).
> 
> In the DT case, we need to eliminate this explicit registering call.
> Therefore, I need to somehow replace the .controller_data passing in the
> DT case to pass this data to the spi core. But I can't find such a
> mechanism (v3.4-rc2). Is there already a concept or API that I
> overlooked (please just point me to it) or what can I do to solve this?
> (Looks like a general issue for spi slave registration via DT).

Can you point me at specific code?

.controller_data is owned by the spi_master driver.  The eeprom driver
shouldn't be accessing it directly at all; but I'll need to look at
specific code to really understand what is going on.

g.

-- 
Grant Likely, B.Sc, P.Eng.
Secret Lab Technologies,Ltd.
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