[U-Boot] [PATCH v5 0/4] mips: bmips: add HSSPI support

[Álvaro Fernández Rojas]

BCM63xx HSSPI controller has the same issue as BCM63xx SPI controller: it
doesn't allow keeping CS active between transfers.
However, this controller allows changing CS polarities, which is used in the
linux upstream driver to manage CS as desired.

v5: Introduce changes suggested by Jagan Teki:
 - Rename SPI_PP_ macros.
 - cs_activate instead of claim_cs.
 - deactivate_cs instead of release_cs.
 - Use wait_for_bit_be32 instead of infinite loop.
v4: Sync with master.
v3: Switch to CONFIG_BCM63XX_HSSPI and rebase on top of SPI v4.
v2: Introduce changes suggested by Simon Glass:
 - Split bcm63xx_hsspi_xfer() into smaller functions.
 - Check possible clock errors.
 - Check possible reset errors.
 - Switch to devfdt_get_addr_size_index().
 - Use setbits32_be() for clock gate.

Álvaro Fernández Rojas (4):
  dm: spi: add BCM63xx HSSPI driver
  mips: bmips: add bcm63xx-hsspi driver support for BCM6328
  mips: bmips: add bcm63xx-hsspi driver support for BCM63268
  mips: bmips: enable the SPI flash on the Comtrend AR-5387un

 arch/mips/dts/brcm,bcm63268.dtsi        |  21 ++
 arch/mips/dts/brcm,bcm6328.dtsi         |  24 ++
 arch/mips/dts/comtrend,ar-5387un.dts    |  12 +
 configs/comtrend_ar5387un_ram_defconfig |   8 +
 drivers/spi/Kconfig                     |   8 +
 drivers/spi/Makefile                    |   1 +
 drivers/spi/bcm63xx_hsspi.c             | 414 ++++++++++++++++++++++++++++++++
 7 files changed, 488 insertions(+)
 create mode 100644 drivers/spi/bcm63xx_hsspi.c

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2.11.0