Subject: Re: [RFC] Dummy GPIO driver for use with SPI

From: Anton Vorontsov <[email-masked]>
Date: Fri, 12 Dec 2008 18:01:44 +0300

On Fri, Dec 12, 2008 at 09:22:02AM -0500, Steven A. Falco wrote:
> This patch adds a dummy GPIO driver, which is useful for SPI devices
> that do not have a physical chip select.

Hm. Then you don't need a chip-select, and SPI driver must understand
this case. When SPI controller has no "gpios" property, it should just
ignore any chip-select toggling operations.

As an implementation example you can use this patch:

http://patchwork.ozlabs.org/patch/12499/

grep for "SPI w/o chip-select line."

-- 
Anton Vorontsov
email: [email-masked]
irc://irc.freenode.net/bd2