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@38000000 Out: serial@38000000 Err: serial@38000000 =>
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 (22): 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 functions to register CCF clock structs 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 | 48 ++ board/sipeed/maix/MAINTAINERS | 11 + board/sipeed/maix/Makefile | 5 + board/sipeed/maix/maix.c | 54 ++ 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 | 145 +++-- drivers/clk/clk-divider.c | 62 +- drivers/clk/clk-fixed-factor.c | 3 +- drivers/clk/clk-gate.c | 44 +- 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 | 489 ++++++++++++++ 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/linux/clk-provider.h | 9 + 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 ++ 70 files changed, 3673 insertions(+), 288 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