From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Mon, 28 Apr 2008 09:14:19 +0000 (-0700)
Subject: atmel_spi: support zero length transfer
X-Git-Tag: v2.6.26-rc1~879
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06719814780da741e7acf587367a86c3965c03a2;p=pandora-kernel.git

atmel_spi: support zero length transfer

A spi transfer with zero length is not invalid.  For example, such
transfer (len == 0 && delay_usecs != 0) can be used to achieve delay
before first CLK edge after chipselect assertion.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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