This patch set adds Flash Interface Unit(FIU) SPI master support for the Nuvoton NPCM Baseboard Management Controller (BMC). 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. The NPCM750/730/715/710 supports up to three FIU devices: - FIU0 supports two chip select. - FIU3 supports four chip select. - FIUX supports two chip select. The NPCM FIU driver tested on NPCM750 evaluation board. The FIU controller driver using direct map API SPI-MEM interface and tested with the latest m25p80 driver patch https://www.spinics.net/lists/linux-mtd/msg07358.html According a conversion about direct SPI-MEM API https://www.spinics.net/lists/linux-mtd/msg08225.html The m25p80 driver will merge to the spi-nor driver we need to make sure the m25p80 direct SPI-MEM will merge as well. The FIU controller driver tested with the latest spi-nor driver patch https://www.spinics.net/lists/linux-mtd/msg08472.html Addressed comments from: - Mark Brown: https://www.spinics.net/lists/linux-spi/msg18166.html - Boris Brezillon: https://www.spinics.net/lists/linux-spi/msg18176.html - Rob Herring: https://www.spinics.net/lists/linux-spi/msg18289.html Changes since version 2: - Remove unnecessary dev_info probe print. - Support address SPI memory operation. - Limit address size support. - Add vendor prefix to spi-mode property dt-binding documentation. Changes since version 1: - Support spi-mem no data transferred option (SPI_MEM_NO_DATA) Tomer Maimon (2): dt-binding: spi: add NPCM FIU controller spi: npcm-fiu: add NPCM FIU controller driver .../bindings/spi/nuvoton,npcm-fiu.txt | 47 ++ drivers/spi/Kconfig | 10 + drivers/spi/Makefile | 1 + drivers/spi/spi-npcm-fiu.c | 771 ++++++++++++++++++ 4 files changed, 829 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt create mode 100644 drivers/spi/spi-npcm-fiu.c -- 2.18.0
