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authorCédric Le Goater <clg@kaod.org>2016-12-21 17:57:17 +0100
committerCyrille Pitchen <cyrille.pitchen@atmel.com>2017-02-10 13:54:53 +0100
commitceb720c71b6309e7f0e91346779f538625eff3aa (patch)
tree577fc96eec5c6a73daae434621dbb3dc80d2a3b7 /drivers/mtd/spi-nor/Kconfig
parentbc0e151514d09cadb56e473a10c783e64e48ce0b (diff)
mtd: spi-nor: add memory controllers for the Aspeed AST2500 SoC
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>
Diffstat (limited to 'drivers/mtd/spi-nor/Kconfig')
-rw-r--r--drivers/mtd/spi-nor/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 1e6f037923d9..2f38a6d7fdf8 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -29,6 +29,16 @@ config MTD_SPI_NOR_USE_4K_SECTORS
Please note that some tools/drivers/filesystems may not work with
4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
+config SPI_ASPEED_SMC
+ tristate "Aspeed flash controllers in SPI mode"
+ depends on ARCH_ASPEED || COMPILE_TEST
+ depends on HAS_IOMEM && OF
+ help
+ This enables support for the Firmware Memory controller (FMC)
+ in the Aspeed AST2500 SoC when attached to SPI NOR chips,
+ and support for the SPI flash memory controller (SPI) for
+ the host firmware. The implementation only supports SPI NOR.
+
config SPI_ATMEL_QUADSPI
tristate "Atmel Quad SPI Controller"
depends on ARCH_AT91 || (ARM && COMPILE_TEST)