[PATCH 0/8 v4] RISC-V: add LiteX SoC support

[Antony Pavlov]

Changes since v3:

  * rebased on top of next branch;
  * the "console: support set baudrate for fixed baudrate drivers" patch
    is introduced so the "litex serial: add setbrg callback" patch is dropped;
  * update mac0 IP-block base addresses in litex dts according to latest
    SoC configuration.

Changes since v2:

  * rebase on top of master branch (f873c7ff2497) +
    "RISC-V: extend multi-image to support both S- and M-Mode"
    (http://lists.infradead.org/pipermail/barebox/2021-May/036086.html).
  * "litex serial: add setbrg callback" patch by Marek Czerski is added
    for review;
  * fix "clocksource: timer-riscv: select CSR from device tree" patch;
  * change gpio IP-block base addresses in litex dts;
  * gpio-74xx-mmio uses device_get_match_data() now.

Changes since v1:

  * rebased on top of next branch;
  * new patches are introduced:
    * clocksource: timer-riscv: select CSR from device tree
    * RISC-V: make RISCV_SBI and RISCV_M_MODE explicitly mutually exclusive
    * RISC-V: make it possible to build RV32I multi-image with DEBUG_LL=n
  * almost all of Ahmad's notes are fixed (e.g. unused header files inclusions are dropped);
  * NOT FIXED: gpio-74xx-mmio still uses dev_get_drvdata(), not device_get_match_data()


Antony Pavlov (8):
  clocksource: timer-riscv: select CSR from device tree
  serial: add litex UART driver
  console: support set baudrate for fixed baudrate drivers
  gpio: add driver for 74xx-ICs with MMIO access
  spi: add litex spiflash driver
  net: add LiteEth driver
  RISC-V: add LiteX SoC and linux-on-litex-vexriscv support
  RISC-V: add litex_linux_defconfig

 arch/riscv/Kconfig.socs                  |  14 +
 arch/riscv/boards/Makefile               |   1 +
 arch/riscv/boards/litex-linux/Makefile   |   3 +
 arch/riscv/boards/litex-linux/lowlevel.c |  22 ++
 arch/riscv/configs/litex_linux_defconfig |  75 +++++
 arch/riscv/dts/Makefile                  |   1 +
 arch/riscv/dts/erizo.dtsi                |   2 +
 arch/riscv/dts/litex-linux.dts           |  92 ++++++
 arch/riscv/dts/litex_soc_linux.dtsi      |  49 +++
 arch/riscv/include/asm/debug_ll.h        |   3 +
 arch/riscv/include/asm/debug_ll_litex.h  | 123 ++++++++
 common/Kconfig                           |   4 +
 common/console.c                         |  10 +-
 drivers/clocksource/timer-riscv.c        |  24 +-
 drivers/gpio/Kconfig                     |  14 +
 drivers/gpio/Makefile                    |   1 +
 drivers/gpio/gpio-74xx-mmio.c            | 165 ++++++++++
 drivers/net/Kconfig                      |   8 +
 drivers/net/Makefile                     |   1 +
 drivers/net/liteeth.c                    | 376 +++++++++++++++++++++++
 drivers/serial/Makefile                  |   1 +
 drivers/serial/serial_litex.c            |  96 ++++++
 drivers/spi/Kconfig                      |   3 +
 drivers/spi/Makefile                     |   1 +
 drivers/spi/litex_spiflash.c             | 241 +++++++++++++++
 images/Makefile.riscv                    |   4 +
 26 files changed, 1318 insertions(+), 16 deletions(-)
 create mode 100644 arch/riscv/boards/litex-linux/Makefile
 create mode 100644 arch/riscv/boards/litex-linux/lowlevel.c
 create mode 100644 arch/riscv/configs/litex_linux_defconfig
 create mode 100644 arch/riscv/dts/litex-linux.dts
 create mode 100644 arch/riscv/dts/litex_soc_linux.dtsi
 create mode 100644 arch/riscv/include/asm/debug_ll_litex.h
 create mode 100644 drivers/gpio/gpio-74xx-mmio.c
 create mode 100644 drivers/net/liteeth.c
 create mode 100644 drivers/serial/serial_litex.c
 create mode 100644 drivers/spi/litex_spiflash.c

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2.32.0