[PATCH v9 00/21] riscv: Add Sipeed Maix support

Sean Anderson
2020-04-23T02:32:59Z

This patch series adds support for Sipeed Maix boards and the Kendryte
K210 CPU. Currently, only the Maix Bit V2.0 is supported, however other
models are similar.

Known Bugs/Limitations:
- Accessing the AI ram hangs, limiting available ram to 6M
- Trying to boot an image with bootm fails with
ERROR: Failed to allocate 0x7d60 bytes below 0x80000000.

To flash u-boot to a maix bit, run
kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin

Boot output should look like the following:

U-Boot 2020.04-rc2-00087-g2221cc09c1-dirty (Feb 28 2020 - 13:53:09 -0500)

DRAM: 8 MiB
In: serial at 38000000
Out: serial at 38000000
Err: serial at 38000000
=>

Changes for v9:
- Fix error in Andes PLIC
- Update MAINTAINERS
- Mark dts blocks in documentation as "none" highlighting

Changes for v8:
- Removed dependency on the patch "clk: Add functions to register CCF clock
structs". Hopefully this will make reviewing easier.

Changes for v7:
- Split documentation from other board support
- Split IPI clear from other IPI cleanup
- Rebased onto a clean upstream. Hopefully this fixes any patching
problems.

Changes for v6:
- Remove spi, pinmux, gpio, led, and wdt support --- to be added in separate
patches
- Rebase onto master
- Clear IPIs before enabling them
- Reorganize code so checkpatch errors less

Changes for v5:
- Rebase onto master
- Add pinconf support
- Add gpio support
- Store environment in spi flash
- Group patches by prefix
- Add additional documentation
- Add SMP support
- Add WDT support

Changes for v4:
- Linted several patches
- Updated the copyright year for several files
- Added tests for syscon-reset, simple-pm-bus, and the pll calc_rate function
- Added/updated documentation
- Fixed SPI for the nor flash
- Fixed PLLs not enabling/setting rate properly
- RISCV_PRIV_1_9_1 now (un)defines all diferring CSRs, and also disables VM
- More devicetree changes

Changes for v3:
- Remove patch to set RV64I as default
- Remove patch for a separate sysctl driver
- Split off cpu frequency patch into its own series
- Reorder support/devicetree patches to come last
- Add patch for reset driver
- Add simple-pm-bus for busses with their own clocks
- Add additional documentation
- Reword mcounteren patch to refer to the RISC-V priv spec 1.9.1
- Many devicetree changes
- Switch to "make savedefconfig" to generate the config

Changes for v2:
- Many bugfixes for the device tree
- Modify the config to build without errors
- Add support for keeping internal PLL frequencies in-range
- Fix several rebase-induced artifacts

Sean Anderson (21):
clk: Always use the supplied struct clk
clk: Check that ops of composite clock components exist before calling
clk: Unconditionally recursively en-/dis-able clocks
clk: Fix clk_get_by_* handling of index
clk: Add K210 pll support
clk: Add a bypass clock for K210
clk: Add K210 clock support
dm: Add support for simple-pm-bus
dm: Fix error handling for dev_read_addr_ptr
reset: Add generic reset driver
lib: Always set errno in hcreate_r
riscv: Add headers for asm/global_data.h
riscv: Clear pending interrupts before enabling IPIs
riscv: Clean up IPI initialization code
riscv: Add option to support RISC-V privileged spec 1.9
riscv: Allow use of reset drivers
riscv: Try to get cpu frequency from a "clocks" node if it exists
riscv: Enable cpu clock if it is present
riscv: Add device tree for K210 and Sipeed Maix BitM
doc: riscv: Add documentation for Sipeed Maix Bit
riscv: Add Sipeed Maix support

MAINTAINERS | 7 +
arch/riscv/Kconfig | 14 +
arch/riscv/cpu/cpu.c | 15 +
arch/riscv/cpu/start.S | 2 +
arch/riscv/dts/Makefile | 1 +
arch/riscv/dts/k210-maix-bit.dts | 47 ++
arch/riscv/dts/k210.dtsi | 594 ++++++++++++++++
arch/riscv/include/asm/csr.h | 40 ++
arch/riscv/include/asm/global_data.h | 2 +
arch/riscv/include/asm/smp.h | 43 ++
arch/riscv/lib/andes_plic.c | 34 +-
arch/riscv/lib/reset.c | 2 +
arch/riscv/lib/sbi_ipi.c | 5 +
arch/riscv/lib/sifive_clint.c | 33 +-
arch/riscv/lib/smp.c | 56 +-
arch/sandbox/dts/test.dts | 21 +
arch/sandbox/include/asm/clk.h | 1 +
board/sipeed/maix/Kconfig | 47 ++
board/sipeed/maix/MAINTAINERS | 11 +
board/sipeed/maix/Makefile | 5 +
board/sipeed/maix/maix.c | 41 ++
configs/sandbox_defconfig | 3 +
configs/sipeed_maix_bitm_defconfig | 8 +
doc/board/index.rst | 1 +
doc/board/sipeed/index.rst | 9 +
doc/board/sipeed/maix.rst | 298 ++++++++
.../bus/simple-pm-bus.txt | 44 ++
.../mfd/kendryte,k210-sysctl.txt | 33 +
.../reset/syscon-reset.txt | 36 +
doc/imx/clk/ccf.txt | 63 +-
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-composite.c | 64 +-
drivers/clk/clk-divider.c | 6 +-
drivers/clk/clk-fixed-factor.c | 3 +-
drivers/clk/clk-gate.c | 6 +-
drivers/clk/clk-mux.c | 12 +-
drivers/clk/clk-uclass.c | 68 +-
drivers/clk/imx/clk-gate2.c | 4 +-
drivers/clk/imx/clk-imx8mp.c | 2 +-
drivers/clk/kendryte/Kconfig | 12 +
drivers/clk/kendryte/Makefile | 1 +
drivers/clk/kendryte/bypass.c | 270 +++++++
drivers/clk/kendryte/clk.c | 663 ++++++++++++++++++
drivers/clk/kendryte/pll.c | 601 ++++++++++++++++
drivers/core/Kconfig | 7 +
drivers/core/Makefile | 1 +
drivers/core/read.c | 2 +-
drivers/core/simple-pm-bus.c | 56 ++
drivers/cpu/riscv_cpu.c | 39 +-
drivers/pinctrl/broadcom/pinctrl-bcm283x.c | 2 +-
drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 2 +-
drivers/reset/Kconfig | 5 +
drivers/reset/Makefile | 1 +
drivers/reset/reset-syscon.c | 80 +++
include/configs/sipeed-maix.h | 24 +
include/dm/read.h | 4 +-
include/dt-bindings/clock/k210-sysctl.h | 59 ++
include/dt-bindings/mfd/k210-sysctl.h | 38 +
include/dt-bindings/reset/k210-sysctl.h | 38 +
include/kendryte/bypass.h | 31 +
include/kendryte/clk.h | 35 +
include/kendryte/pll.h | 57 ++
include/test/export.h | 16 +
lib/hashtable.c | 8 +-
test/dm/Makefile | 3 +
test/dm/k210_pll.c | 96 +++
test/dm/simple-pm-bus.c | 45 ++
test/dm/syscon-reset.c | 58 ++
69 files changed, 3732 insertions(+), 205 deletions(-)
create mode 100644 arch/riscv/dts/k210-maix-bit.dts
create mode 100644 arch/riscv/dts/k210.dtsi
create mode 100644 board/sipeed/maix/Kconfig
create mode 100644 board/sipeed/maix/MAINTAINERS
create mode 100644 board/sipeed/maix/Makefile
create mode 100644 board/sipeed/maix/maix.c
create mode 100644 configs/sipeed_maix_bitm_defconfig
create mode 100644 doc/board/sipeed/index.rst
create mode 100644 doc/board/sipeed/maix.rst
create mode 100644 doc/device-tree-bindings/bus/simple-pm-bus.txt
create mode 100644 doc/device-tree-bindings/mfd/kendryte,k210-sysctl.txt
create mode 100644 doc/device-tree-bindings/reset/syscon-reset.txt
create mode 100644 drivers/clk/kendryte/Kconfig
create mode 100644 drivers/clk/kendryte/Makefile
create mode 100644 drivers/clk/kendryte/bypass.c
create mode 100644 drivers/clk/kendryte/clk.c
create mode 100644 drivers/clk/kendryte/pll.c
create mode 100644 drivers/core/simple-pm-bus.c
create mode 100644 drivers/reset/reset-syscon.c
create mode 100644 include/configs/sipeed-maix.h
create mode 100644 include/dt-bindings/clock/k210-sysctl.h
create mode 100644 include/dt-bindings/mfd/k210-sysctl.h
create mode 100644 include/dt-bindings/reset/k210-sysctl.h
create mode 100644 include/kendryte/bypass.h
create mode 100644 include/kendryte/clk.h
create mode 100644 include/kendryte/pll.h
create mode 100644 include/test/export.h
create mode 100644 test/dm/k210_pll.c
create mode 100644 test/dm/simple-pm-bus.c
create mode 100644 test/dm/syscon-reset.c

--
2.25.1