[0/6] spi: Add Renesas SPIBSC controller

Message

Chris Brandt Dec. 3, 2019, 3:45 a.m. UTC

The Renesas SPI Bus Space Controller (SPIBSC) HW was specifically designed for
accessing SPI flash devices. In the hardware manuals, it is almost always
labeled as the "Renesas SPI Multi I/O Bus Controller". However, the HW IP is
usually referred to within Renesas as the "SPIBSC" block.

This driver has been tested on an RZ/A1H RSK and RZ/A2M EVB.

The testing mostly consisted of formatting an area as JFFS2 and doing copying
of files and such.

While the HW changed a little between the RZ/A1 and RZ/A2 generations, the IP
block in the RZ/A2M was taken from the R-Car H3 design, so in theory this
driver should work for R-Car Gen3 as well.



Chris Brandt (6):
  clk: renesas: mstp: Add critical clock from device tree support
  ARM: dts: r7s72100: Add SPIBSC clocks
  clk: renesas: r7s9210: Add SPIBSC clock
  spi: Add SPIBSC driver
  ARM: dts: r7s9210: Add SPIBSC Device support
  dt-bindings: spi: Document Renesas SPIBSC bindings

 .../bindings/spi/spi-renesas-spibsc.txt       |  48 ++
 arch/arm/boot/dts/r7s72100.dtsi               |  26 +-
 arch/arm/boot/dts/r7s9210.dtsi                |  10 +
 drivers/clk/renesas/clk-mstp.c                |  16 +-
 drivers/clk/renesas/r7s9210-cpg-mssr.c        |   9 +
 drivers/spi/Kconfig                           |   8 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-spibsc.c                      | 609 ++++++++++++++++++
 8 files changed, 719 insertions(+), 8 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-renesas-spibsc.txt
 create mode 100644 drivers/spi/spi-spibsc.c