This series of patches improves support for boards based on the Kendryte K210 RISC-V dual core SoC. Minimal support for this SoC is already included in the kernel. These patches complete it, enabling support for most peripherals present on the SoC, as well as introducing device trees for the various boards available on the market today from SiPeed and Kendryte. The first patch of this series is a fix of the device tree parsing code. Without this fix, a warning is generated when parsing Designware gpio controller nodes. The following 6 patches are fixes and improvements to the Designware SPI driver to enable support for the MMC-spi slot found on all K210 boards. Pathes 8 to 13 are various fixes for riscv arch code and riscv dependent devices. Of not here is patch 11 which fix system call execution in the no MMU case, and patch 13 which simplifies DTB builtin handling. The following patches 14 to 25 implement and document idevice tree mapping of several drivers for the K210 SoC: clock driver, reset controller and pin function management (pinctrl). Patches 26 to 31 update the existing K210 device tree and device new device tree files for several K210 based boards: the MAIX Bit, MAIXSUINO, MAIX Dock and MAIX Go boards from SiPeed and the KD233 development board from Kendryte. Finally the last patch updates the k210 nommu defconfig to include the newly implemented drivers. A lot of the work on the device tree and on the K210 drivers come from the work of Sean Anderson for the U-Boot project support of the K210 SoC. Sean also helped with debugging the idriver for the DesignWare SPIi controller of the SoC. A tree with all patches applied is available here: https://github.com/damien-lemoal/linux (use the latest k210-sysctl-vXX branch). A demonstration of this series used on a SiPeed MAIX Dock board together with an I2C servo controller can be seen here: https://damien-lemoal.github.io/linux-robot-arm/#example This tree was used to build userspace busybox environment image that is then copied onto SD card with ext2: https://github.com/damien-lemoal/buildroot Of note is that running this userspace environment requires a revert of commit 2217b982624680d19a80ebb4600d05c8586c4f96 introduced during the 5.9 development cycle. Without this revert, execution of the init process fails. A problem with the riscv port of elf2flt is suspected but not confirmed. I am now starting to investigate this problem. Reviews and comments are as always much welcome. Damien Le Moal (32): of: Fix property supplier parsing spi: dw: Add support for 32-bits ctrlr0 layout spi: dw: Fix driving MOSI low while recieving spi: dw: Introduce polling device tree property spi: dw: Introduce DW_SPI_CAP_POLL_NODELAY spi: dw: Add support for the Kendryte K210 SoC dt-bindings: Update DW SPI device tree bindings riscv: Fix kernel time_init() riscv: Fix SiFive gpio probe riscv: Fix sifive serial driver riscv: Enable interrupts during syscalls with M-Mode riscv: Automatically select sysctl config options riscv: Fix builtin DTB handling dt-bindings: Define all Kendryte K210 clock IDs dt-bindings: Define Kendryte K210 sysctl registers dt-bindings: Define Kendryte K210 pin functions dt-bindings: Define Kendryte K210 reset signals riscv: Add Kendryte K210 SoC clock driver riscv: Add Kendryte K210 SoC reset controller riscv: Add Kendryte K210 FPIOA pinctrl driver dt-bindings: Add Kendryte and Canaan vendor prefix dt-binding: Document kendryte,k210-sysctl bindings dt-binding: Document kendryte,k210-clk bindings dt-bindings: Document kendryte,k210-fpioa bindings dt-bindings: Document kendryte,k210-rst bindings riscv: Update Kendryte K210 device tree riscv: Add SiPeed MAIX BiT board device tree riscv: Add SiPeed MAIX DOCK board device tree riscv: Add SiPeed MAIX GO board device tree riscv: Add SiPeed MAIXDUINO board device tree riscv: Add Kendryte KD233 board device tree riscv: Update Kendryte K210 defconfig .../bindings/clock/kendryte,k210-clk.yaml | 70 ++ .../bindings/mfd/kendryte,k210-sysctl.yaml | 65 ++ .../bindings/pinctrl/kendryte,k210-fpioa.yaml | 106 ++ .../bindings/reset/kendryte,k210-rst.yaml | 78 ++ .../bindings/spi/snps,dw-apb-ssi.yaml | 5 + .../devicetree/bindings/vendor-prefixes.yaml | 4 + arch/riscv/Kconfig.socs | 29 +- arch/riscv/boot/dts/kendryte/Makefile | 5 +- arch/riscv/boot/dts/kendryte/k210.dts | 23 - arch/riscv/boot/dts/kendryte/k210.dtsi | 564 +++++++++- arch/riscv/boot/dts/kendryte/k210_generic.dts | 46 + arch/riscv/boot/dts/kendryte/k210_kd233.dts | 177 ++++ .../riscv/boot/dts/kendryte/k210_maix_bit.dts | 226 ++++ .../boot/dts/kendryte/k210_maix_dock.dts | 229 ++++ arch/riscv/boot/dts/kendryte/k210_maix_go.dts | 237 +++++ .../boot/dts/kendryte/k210_maixduino.dts | 203 ++++ arch/riscv/configs/nommu_k210_defconfig | 45 +- arch/riscv/include/asm/soc.h | 38 - arch/riscv/kernel/entry.S | 9 + arch/riscv/kernel/soc.c | 27 - arch/riscv/kernel/time.c | 3 + arch/riscv/mm/init.c | 6 +- drivers/clk/Kconfig | 9 + drivers/clk/Makefile | 1 + drivers/clk/clk-k210.c | 962 +++++++++++++++++ drivers/gpio/gpio-sifive.c | 2 +- drivers/of/property.c | 17 +- drivers/pinctrl/Kconfig | 15 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-k210.c | 999 ++++++++++++++++++ drivers/reset/Kconfig | 9 + drivers/reset/Makefile | 1 + drivers/reset/reset-k210.c | 186 ++++ drivers/soc/Kconfig | 2 +- drivers/soc/kendryte/Kconfig | 19 +- drivers/soc/kendryte/Makefile | 2 +- drivers/soc/kendryte/k210-sysctl.c | 253 +---- drivers/spi/spi-dw-core.c | 22 +- drivers/spi/spi-dw-mmio.c | 20 +- drivers/spi/spi-dw.h | 10 + drivers/tty/serial/sifive.c | 1 + include/dt-bindings/clock/k210-clk.h | 61 +- include/dt-bindings/mfd/k210-sysctl.h | 41 + include/dt-bindings/pinctrl/k210-pinctrl.h | 277 +++++ include/dt-bindings/reset/k210-rst.h | 42 + include/soc/kendryte/k210-sysctl.h | 11 + 46 files changed, 4770 insertions(+), 388 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/kendryte,k210-clk.yaml create mode 100644 Documentation/devicetree/bindings/mfd/kendryte,k210-sysctl.yaml create mode 100644 Documentation/devicetree/bindings/pinctrl/kendryte,k210-fpioa.yaml create mode 100644 Documentation/devicetree/bindings/reset/kendryte,k210-rst.yaml delete mode 100644 arch/riscv/boot/dts/kendryte/k210.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_generic.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_kd233.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_maix_bit.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_maix_dock.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_maix_go.dts create mode 100644 arch/riscv/boot/dts/kendryte/k210_maixduino.dts create mode 100644 drivers/clk/clk-k210.c create mode 100644 drivers/pinctrl/pinctrl-k210.c create mode 100644 drivers/reset/reset-k210.c create mode 100644 include/dt-bindings/mfd/k210-sysctl.h create mode 100644 include/dt-bindings/pinctrl/k210-pinctrl.h create mode 100644 include/dt-bindings/reset/k210-rst.h create mode 100644 include/soc/kendryte/k210-sysctl.h -- 2.28.0
