Hi Nobuhiro, Pavel,

This patch series adds SPI driver for the Renesas RPC-IF.
Alongside relevant changes for spi-mem have been also
backported. This enables accessing SPI flash chip connected
to RPC-IF on RZ/G2x boards.

We currently only aim to backport just the driver hence there
are no changes to dts/i files. The driver has been tested on
RZ/G2{EM} (I shall reply to this e-mail with the results) with
all the required dts/i changes [1].

Currently we are upstreaming clock [2] and pinctrl [3] changes
required for RPC-IF interface on RZ/G2x SoC's once that hits
v5.11 we shall backport it.

All the patches have been cherry picked from Linux 5.9-rc5.

[1] https://github.com/prabhakarlad/cip/commits/master
[2] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=365697
[3] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=387535

Cheers,
Prabhakar

Boris Brezillon (3):
  spi: spi-mem: Add SPI_MEM_NO_DATA to the spi_mem_data_dir enum
  spi: spi-mem: Split spi_mem_exec_op() code
  spi: spi-mem: Add a new API to support direct mapping

Naga Sureshkumar Relli (1):
  spi: spi-mem: export spi_mem_default_supports_op()

Sergei Shtylyov (3):
  dt-bindings: memory: document Renesas RPC-IF bindings
  memory: add Renesas RPC-IF driver
  spi: add Renesas RPC-IF driver

 .../memory-controllers/renesas,rpc-if.yaml    |  88 +++
 drivers/memory/Kconfig                        |   9 +
 drivers/memory/Makefile                       |   1 +
 drivers/memory/renesas-rpc-if.c               | 603 ++++++++++++++++++
 drivers/spi/Kconfig                           |   6 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-mem.c                         | 273 +++++++-
 drivers/spi/spi-rpc-if.c                      | 216 +++++++
 include/linux/spi/spi-mem.h                   |  93 +++
 include/memory/renesas-rpc-if.h               |  87 +++
 10 files changed, 1353 insertions(+), 24 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml
 create mode 100644 drivers/memory/renesas-rpc-if.c
 create mode 100644 drivers/spi/spi-rpc-if.c
 create mode 100644 include/memory/renesas-rpc-if.h

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2.17.1