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Mainline Linux tree for various devices, only for fun :)
ceb720c71b
This driver adds mtd support for the Aspeed AST2500 SoC static memory
controllers :
* Firmware SPI Memory Controller (FMC)
. BMC firmware
. 3 chip select pins (CE0 ~ CE2)
. supports SPI type flash memory (CE0-CE1)
. CE2 can be of NOR type flash but this is not supported by the
driver
* SPI Flash Controller (SPI1 and SPI2)
. host firmware
. 2 chip select pins (CE0 ~ CE1)
. supports SPI type flash memory
Each controller has a memory range on which it maps its flash module
slaves. Each slave is assigned a memory window for its mapping that
can be changed at bootime with the Segment Address Register.
Each SPI flash slave can then be accessed in two modes: Command and
User. When in User mode, accesses to the memory segment of the slaves
are translated in SPI transfers. When in Command mode, the HW
generates the SPI commands automatically and the memory segment is
accessed as if doing a MMIO.
Currently, only the User mode is supported. Command mode needs a
little more work to check that the memory window on the AHB bus fits
the module size.
Based on previous work from Milton D. Miller II <miltonm@us.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.