From: Christian Gagneraud <chris@techworks.ie>
To: linux-kernel@vger.kernel.org
Subject: AT91: SPI: On implementing peripheral chip select decoding
Date: Fri, 13 May 2011 17:37:39 +0100 [thread overview]
Message-ID: <4DCD5E53.4080505@techworks.ie> (raw)
Hi there,
The AT91SAM9G20 SPI controller (and possibly other SAM9 or other SoC)
has the ability to work with CS decoding, thus allowing up to 15
peripherals with only 4 CS lines (CS[0:3]=0xF meaning no peripheral
selected).
I would like to know if anyone has experimented with this feature, or if
anyone has advices/ideas on how to add support for this feature in the
linux kernel.
Before starting to work on this, I would like to know if this feature is
common on other platforms or if it's AT91 specific.
In the former case, it might be wise to include it in the SPI subsystem,
and in the latter case keep it inside AT91 code.
Chris
next reply other threads:[~2011-05-13 16:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-13 16:37 Christian Gagneraud [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-05-15 13:56 AT91: SPI: On implementing peripheral chip select decoding Christian Gagneraud
2011-05-16 12:44 ` Jean-Christophe PLAGNIOL-VILLARD
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