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17 Jan 2021 17:47:25 -0800 IronPort-SDR: JzjiqaLtA539a4xLp3ArTSCBNJj24HZYLupQUalSjNhXzd7zlpR7YAeP32AVizKi8sMxFZqq/W XdBRSKTMj7bohgraj2mKY4TP8BFX90Ge3Qfh4+oDebCi0AWZwvvIstMYiW+9bZq7DH/T7/+sfW ZFX68fDt7fD+dOMKFPoTHmmdHl4T7QGZraYuTkiNaLrd6RAZDn5cUk92PA++R6egYdiAPR+qYH Oj8IGYTN8///xh9msTXRoOeya1BQVdLsanTIyzlHrPSdj4OdYnoQ9NY2eFMYb4juEn15/jCjgF 8Us= WDCIronportException: Internal Received: from cnf011319.ad.shared (HELO twashi.fujisawa.hgst.com) ([10.84.70.208]) by uls-op-cesaip02.wdc.com with ESMTP; 17 Jan 2021 18:02:46 -0800 From: Damien Le Moal To: Palmer Dabbelt , linux-riscv@lists.infradead.org Subject: [PATCH v13 00/17] RISC-V Kendryte K210 support improvements Date: Mon, 18 Jan 2021 11:02:27 +0900 Message-Id: <20210118020244.103451-1-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210117_210249_942134_F48853B4 X-CRM114-Status: GOOD ( 23.15 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sean Anderson Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This series of patches improves support for boards based on the Canaan 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 K210 boards available on the market today from SiPeed and Kendryte. The patches here are the remaining patches not yet applied. Patch 1 adds the SoC clock driver and patch 2 adds the pinctrl driver. Patches 3 to 9 add and update device tree bindings documentation to document the K210 device tree files. In particular, patch 3 and 4 define compatible strings used for the SoC CPU and for the K210 based boards supported. Patches 10 to 15 update the existing K210 base device tree and add new device tree files for several K210 based boards: MAIX Bit, MAIXDUINO, MAIX Dock and MAIX Go boards from SiPeed and the KD233 development board from Canaan. Finally the last two patches updates the k210 nommu defconfig to include the newly implemented drivers and provide a new default configuration file enabling SD card support. A lot of the work on the device tree and on the K210 drivers come from the work by Sean Anderson for the U-Boot project support of the K210 SoC. Sean also helped with debugging many aspects of the K210 support. A tree with all patches applied is available here: https://github.com/damien-lemoal/linux, k210-sysctl-v26 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 an SD card formatted 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. Changes from v12: * Addressed Rab's comments: keep SoC specific compatible string for DT nodes reusing existing IP blocks (e.g. PLIC and CLINT). * Addressed dt-bindings schema file check warnings. Changes from v11: * Addressed Stephen's comment on the clock driver * Fixed and added device tree bindings yaml files and fixed the device tree files to fix all warnings generated by make dtbs_check * Rebased on riscv tree fixes + latest riscv for-next branches. Changes from v10: * Rebased on riscv tree fixes+for-next branches. Patches already applied to these branches were removed from this series. * Fixed the clock driver and pinctrl driver patch titles to indicate the correct target sub-components. * Applied reviewed-by tags from Anup. Changes from v9: * Added patch 6 to avoid DTS compilation errors after patch 9 is applied and until patch 16 is applied. Changes from v8: * Addressed Rob's comments on the sysctl driver bindings documentation * Fixed a typo in the fpios driver bindings documentation Changes from v7: * Removed the __init annotation for the drivers reset, pinctrl and sysctl drivers probe functions as suggested by Geert. Also removed the __refdata annotation for the struct platform_driver variables of these drivers. Changes from v6: * Annotate struct platform_driver variables with __refdata to avoid section mismatch compilation errors * Add empty sentinel entry to of_device_id tables of the sysctl, reset and pinctrl drivers. Changes from v5: * Addressed Philipp's comment on the reset controller driver * Added patch 6 to reduce the size of the clock driver patch (now patch 12). Changes from v4: * Simplified reset controller driver using of_xlate callback as suggested by Philipp * Fixed compilation error when using other configs than one of the nommu_k210 defconfigs. * Addressed most clock driver comments from Stephen. * Removed CONFIG_GPIO_SYSFS from defconfigs * Rebased on 5.10-rc7 Changes from V3: * Add one entry per driver in MAINTAINERS file Changes from V2: * Add MAINTAINERS file entry for the SoC support, listing myself as maintainer. * Removed use of postcore_initcall() for declaring the drivers, using the regular builtin_platform_driver() instead. * Fixed fpio pinctrl driver bindings documentation as commented by Geert: removed input-schmitt and added input-schmitt-disable, fixed typo and added input-disable and output-disable. * Fixed device tree to have cs-gpios active low, as per the default, as active high necessity was an artifact of the gpio level double inversion bug fixed recently. * Removed CONFIG_VT from defconfigs to reduce the kernel image size as suggested by Geert. Changes from v1: * Improved DT bindings documentation * SPI and GPIO patches removed from this series (and being processed directly through the relevant subsystems directly) * Improved device trees * Various cleanup and improvments of the drivers Damien Le Moal (17): clk: Add RISC-V Canaan Kendryte K210 clock driver pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver dt-bindings: add Canaan boards compatible strings dt-bindings: update risc-v cpu properties dt-bindings: update sifive plic compatible string dt-bindings: update sifive clint compatible string dt-bindings: update sifive uart compatible string dt-bindings: fix sifive gpio properties dt-bindings: add resets property to dw-apb-timer riscv: Update Canaan 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 Canaan Kendryte K210 defconfig riscv: Add Canaan Kendryte K210 SD card defconfig .../devicetree/bindings/gpio/sifive,gpio.yaml | 21 +- .../sifive,plic-1.0.0.yaml | 20 +- .../devicetree/bindings/riscv/canaan.yaml | 47 + .../devicetree/bindings/riscv/cpus.yaml | 2 + .../bindings/serial/sifive-serial.yaml | 1 + .../bindings/timer/sifive,clint.yaml | 19 +- .../bindings/timer/snps,dw-apb-timer.yaml | 3 + MAINTAINERS | 8 + arch/riscv/Kconfig.socs | 3 +- arch/riscv/boot/dts/canaan/canaan_kd233.dts | 177 +++ arch/riscv/boot/dts/canaan/k210.dts | 23 - arch/riscv/boot/dts/canaan/k210.dtsi | 535 ++++++++- arch/riscv/boot/dts/canaan/k210_generic.dts | 46 + .../riscv/boot/dts/canaan/sipeed_maix_bit.dts | 234 ++++ .../boot/dts/canaan/sipeed_maix_dock.dts | 236 ++++ arch/riscv/boot/dts/canaan/sipeed_maix_go.dts | 244 ++++ .../boot/dts/canaan/sipeed_maixduino.dts | 209 ++++ arch/riscv/configs/nommu_k210_defconfig | 44 +- .../riscv/configs/nommu_k210_sdcard_defconfig | 92 ++ drivers/clk/Kconfig | 8 + drivers/clk/Makefile | 1 + drivers/clk/clk-k210.c | 1012 +++++++++++++++++ drivers/pinctrl/Kconfig | 13 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-k210.c | 985 ++++++++++++++++ drivers/soc/canaan/Kconfig | 18 +- drivers/soc/canaan/Makefile | 2 +- drivers/soc/canaan/k210-sysctl.c | 205 +--- include/dt-bindings/clock/k210-clk.h | 1 - include/soc/canaan/k210-sysctl.h | 2 + 30 files changed, 3957 insertions(+), 255 deletions(-) create mode 100644 Documentation/devicetree/bindings/riscv/canaan.yaml create mode 100644 arch/riscv/boot/dts/canaan/canaan_kd233.dts delete mode 100644 arch/riscv/boot/dts/canaan/k210.dts create mode 100644 arch/riscv/boot/dts/canaan/k210_generic.dts create mode 100644 arch/riscv/boot/dts/canaan/sipeed_maix_bit.dts create mode 100644 arch/riscv/boot/dts/canaan/sipeed_maix_dock.dts create mode 100644 arch/riscv/boot/dts/canaan/sipeed_maix_go.dts create mode 100644 arch/riscv/boot/dts/canaan/sipeed_maixduino.dts create mode 100644 arch/riscv/configs/nommu_k210_sdcard_defconfig create mode 100644 drivers/clk/clk-k210.c create mode 100644 drivers/pinctrl/pinctrl-k210.c