Hello all, This series adds support for the Microchip Inter-Processor Communication (IPC) mailbox controller, as well as an IPC remoteproc platform driver. Microchip's family of RISC-V SoCs typically has one or more clusters that can be configured to run in Asymmetric Multi-Processing (AMP) mode. The Microchip IPC is used to send messages between processors using an interrupt signaling mechanism. The driver uses the RISC-V Supervisor Binary Interface (SBI) to communicate with software running in machine mode (M-mode) to access the IPC hardware block. Additional details on the Microchip vendor extension and the IPC function IDs described in the driver can be found in the following documentation: https://github.com/linux4microchip/microchip-sbi-ecall-extension The IPC remoteproc platform driver allows for starting and stopping firmware on the remote cluster(s) and facilitates RPMsg communication. The remoteproc attach/detach operations are also supported for use cases where the firmware is loaded by the Hart Software Services (zero-stage bootloader) before Linux boots. Error Recovery and Power Management features are not currently supported in the remoteproc platform driver. The PIC64GX MPU has a Mi-V IHC block, this will be added to the PIC64GX dts after the initial upstreaming: https://patchwork.kernel.org/project/linux-riscv/patch/20240725121609.13101-18-pierre-henry.moussay@xxxxxxxxxxxxx/ Thanks, Valentina Valentina Fernandez (5): riscv: asm: vendorid_list: Add Microchip Technology to the vendor list dt-bindings: mailbox: add binding for Microchip IPC mailbox driver mailbox: add Microchip IPC support dt-bindings: remoteproc: add binding for Microchip IPC remoteproc remoteproc: add support for Microchip IPC remoteproc platform driver .../bindings/mailbox/microchip,sbi-ipc.yaml | 115 ++++ .../remoteproc/microchip,ipc-remoteproc.yaml | 84 +++ arch/riscv/include/asm/vendorid_list.h | 1 + drivers/mailbox/Kconfig | 12 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-mchp-ipc-sbi.c | 539 ++++++++++++++++++ drivers/remoteproc/Kconfig | 12 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/mchp_ipc_remoteproc.c | 461 +++++++++++++++ include/linux/mailbox/mchp-ipc.h | 23 + 10 files changed, 1250 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/microchip,sbi-ipc.yaml create mode 100644 Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml create mode 100644 drivers/mailbox/mailbox-mchp-ipc-sbi.c create mode 100644 drivers/remoteproc/mchp_ipc_remoteproc.c create mode 100644 include/linux/mailbox/mchp-ipc.h -- 2.34.1
