spi: npcm-fiu: add NPCM FIU controller driver
Add Nuvoton NPCM BMC Flash Interface Unit(FIU) SPI master
controller driver using SPI-MEM interface.
The FIU supports single, dual or quad communication interface.
the FIU controller can operate in following modes:
- User Mode Access(UMA): provides flash access by using an
indirect address/data mechanism.
- direct rd/wr mode: maps the flash memory into the core
address space.
- SPI-X mode: used for an expansion bus to an ASIC or CPLD.
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/20190828142513.228556-3-tmaimon77@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 3a1d8f1..6ee514f 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -433,6 +433,16 @@
help
This selects a driver for the MediaTek MT7621 SPI Controller.
+config SPI_NPCM_FIU
+ tristate "Nuvoton NPCM FLASH Interface Unit"
+ depends on ARCH_NPCM || COMPILE_TEST
+ depends on OF && HAS_IOMEM
+ help
+ This enables support for the Flash Interface Unit SPI controller
+ in master mode.
+ This driver does not support generic SPI. The implementation only
+ supports spi-mem interface.
+
config SPI_NPCM_PSPI
tristate "Nuvoton NPCM PSPI Controller"
depends on ARCH_NPCM || COMPILE_TEST