RISC-V: add LiteX SoC support

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

2.32.0


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