SPI-NOR framework currently supports- - (1-1-1, 1-1-2, 1-1-4) read protocols - read latency(dummy bytes) are hardcoded with the assumption that the flash would support it. - No support of mode bits. - No support of flash size above 128Mib
This patch set add support of 1-2-2, 1-4-4 read protocols. It ports Linux commits "mtd: spi-nor: add a stateless method to support memory size above 128Mib" and "mtd: spi-nor: parse Serial Flash Discoverable Parameters (SFDP) tables". It enables 4byte address opcode and run time flash parameters discovery including dummy cycle and mode cycle.
Prabhakar Kushwaha (3): sf: Add support of 1-2-2, 1-4-4 IO READ protocols sf: add method to support memory size above 128Mib sf: parse Serial Flash Discoverable Parameters (SFDP) tables
Changes for v2: Incorporated Cyrille Pitchen's comments
drivers/mtd/spi/sf_internal.h | 231 ++++++++++++++++- drivers/mtd/spi/spi_flash.c | 589 +++++++++++++++++++++++++++++++++++++++++- include/spi_flash.h | 2 + 3 files changed, 808 insertions(+), 14 deletions(-)