This patchset adds a spi-mem driver for Mediatek SPI-NOR controller,
which already has limited support by mtk-quadspi. This new driver can
make use of full quadspi capability of this controller.

1st new commit makes spi-max-frequency optional to match current
binding doc and make this new driver compatible with old driver dt
bindings.

Changes since v1:
 two new commits.

Chuanhong Guo (4):
  spi: make spi-max-frequency optional
  spi: add support for mediatek spi-nor controller
  dt-bindings: convert mtk-quadspi binding doc for spi-mtk-nor
  mtd: spi-nor: remove mtk-quadspi driver

 .../mtk-quadspi.txt => spi/spi-mtk-nor.txt}   |  34 +-
 drivers/mtd/spi-nor/Kconfig                   |   8 -
 drivers/mtd/spi-nor/Makefile                  |   1 -
 drivers/mtd/spi-nor/mtk-quadspi.c             | 565 --------------
 drivers/spi/Kconfig                           |  10 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-mtk-nor.c                     | 689 ++++++++++++++++++
 drivers/spi/spi.c                             |   9 +-
 8 files changed, 717 insertions(+), 600 deletions(-)
 rename Documentation/devicetree/bindings/{mtd/mtk-quadspi.txt => spi/spi-mtk-nor.txt} (62%)
 delete mode 100644 drivers/mtd/spi-nor/mtk-quadspi.c
 create mode 100644 drivers/spi/spi-mtk-nor.c

-- 
2.24.1


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