[PATCH 00/14] spi: dw: Add support for DUAL/QUAD/OCTAL modes

[Sean Anderson]

This series adds support for enhanced SPI modes. It was tested on a K210 (DWC
SSI with QSPI flash).

If anyone has a designware device with QSPI flash attached (especially a DW SSI
APB device), I'd greatly appreciate them testing out this patch series.

Many of the earlier patches in this series are general fixups and can be split
off/merged separately if desired.


Sean Anderson (14):
  cmd: sf: Display errno on erase failure
  cmd: sf: Print error on test failure
  mtd: spi-nor-core: Fix typo in documentation
  mtd: spi-mem: Export spi_mem_default_supports_op
  spi: spi-mem: Add debug message for spi-mem ops
  spi: dw: Log status register on timeout
  spi: dw: Mask all possible interrupts
  spi: dw: Switch to capabilities
  spi: dw: Rewrite poll_transfer logic
  spi: dw: Add DUAL/QUAD/OCTAL caps
  spi: dw: Add registers necessary for DUAL/QUAD/OCTAL
  spi: dw: Support DUAL/QUAD/OCTAL
  spi: dw: Support clock stretching
  riscv: k210: Enable QSPI for spi3

 arch/riscv/dts/k210-maix-bit.dts |   2 +
 cmd/sf.c                         |  29 +-
 drivers/spi/designware_spi.c     | 652 +++++++++++++++++++++----------
 drivers/spi/spi-mem.c            |   6 +
 include/linux/mtd/spi-nor.h      |   2 +-
 include/spi-mem.h                |   3 +
 6 files changed, 476 insertions(+), 218 deletions(-)

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2.29.2