Stefan Roese b3c195b3a7 spi: orion: Add direct access mode ... This patch adds support for the direct access mode to the Orion SPI driver which is used on the Marvell Armada based SoCs. In this direct mode, all data written to (or read from) a specifically mapped MBus window (linked to one SPI chip-select on one of the SPI controllers) will be transferred directly to the SPI bus. Without the need to control the SPI registers in between. This can improve the SPI transfer rate in such cases. Both, direct-read and -write mode are supported. But only the write mode has been tested. This mode especially benefits from the SPI direct mode, as the data bytes are written head-to-head to the SPI bus, without any additional addresses. One use-case for this direct write mode is, programming a FPGA bitstream image into the FPGA connected to the SPI bus at maximum speed. This mode is described in chapter "22.5.2 Direct Write to SPI" in the Marvell Armada XP Functional Spec Datasheet. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>		2016-05-30 17:01:20 +01:00
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bindings	spi: orion: Add direct access mode	2016-05-30 17:01:20 +01:00
00-INDEX
booting-without-of.txt	sh: add device tree support and generic board using device tree	2016-03-17 19:46:11 +00:00
changesets.txt
dynamic-resolution-notes.txt
of_unittest.txt
overlay-notes.txt
todo.txt
usage-model.txt