From: Bert Vermeulen <bert@biot.com>
Date: Wed, 15 Apr 2015 15:43:52 +0000 (+0200)
Subject: spi: Add SPI driver for Mikrotik RB4xx series boards
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~146^2~1^3~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05aec357871f892eea91d8b808f96a6091dd5310;p=pandora-kernel.git

spi: Add SPI driver for Mikrotik RB4xx series boards

This driver mediates access between the connected CPLD and other devices
on the bus.

The m25p80-compatible boot flash and (some models) MMC use regular SPI,
bitbanged as required by the SoC. However the SPI-connected CPLD has
a two-wire mode, in which two bits are transferred per SPI clock
cycle. The second bit is transmitted with the SoC's CS2 pin.

Signed-off-by: Bert Vermeulen <bert@biot.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

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