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