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2022-05-03spi: npcm-fiu: add NPCM7xx FIU controller driverJim Liu
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 driver provides flash access in UMA(User Mode Access) mode by using an indirect address/data mechanism. the dts node is followed upstream kernel dts name. Signed-off-by: Jim Liu <JJLIU0@nuvoton.com> Signed-off-by: Stanley Chu <yschu@nuvoton.com> Reviewed-by: Jagan Teki <jagan@amarulasolutions.com> [Jagan: fixed the Kconfig, Makefile order] Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>