FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/remoteproc/wkup_m3_rproc.txt

     TI Wakeup M3 Remoteproc Driver
     ==============================
     
     The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor
     (commonly referred to as Wakeup M3 or CM3) to help with various low power tasks
     that cannot be controlled from the MPU. This CM3 processor requires a firmware
     binary to accomplish this. The wkup_m3 remoteproc driver handles the loading of
     the firmware and booting of the CM3.
     
    Wkup M3 Device Node:
    ====================
    A wkup_m3 device node is used to represent the Wakeup M3 processor instance
    within the SoC. It is added as a child node of the parent interconnect bus
    (l4_wkup) through which it is accessible to the MPU.
    
    Required properties:
    --------------------
    - compatible:           Should be one of,
                                    "ti,am3352-wkup-m3" for AM33xx SoCs
                                    "ti,am4372-wkup-m3" for AM43xx SoCs
    - reg:                  Should contain the address ranges for the two internal
                            memory regions, UMEM and DMEM. The parent node should
                            provide an appropriate ranges property for properly
                            translating these into bus addresses.
    - reg-names:            Contains the corresponding names for the two memory
                            regions. These should be named "umem" & "dmem".
    - ti,hwmods:            Name of the hwmod associated with the wkupm3 device.
    - ti,pm-firmware:       Name of firmware file to be used for loading and
                            booting the wkup_m3 remote processor.
    
    Example:
    --------
    /* AM33xx */
    ocp {
             l4_wkup: l4_wkup@44c00000 {
                    compatible = "am335-l4-wkup", "simple-bus";
                    ranges = <0 0x44c00000 0x400000>;
                    #address-cells = <1>;
                    #size-cells = <1>;
    
                    wkup_m3: wkup_m3@100000 {
                            compatible = "ti,am3352-wkup-m3";
                            reg = <0x100000 0x4000>,
                                  <0x180000 0x2000>;
                            reg-names = "umem", "dmem";
                            ti,hwmods = "wkup_m3";
                            ti,pm-firmware = "am335x-pm-firmware.elf";
                    };
            };
    
            ...
    };

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