1 STMicroelectronics STM32 Remoteproc
2 -----------------------------------
3 This document defines the binding for the remoteproc component that loads and
4 boots firmwares on the ST32MP family chipset.
7 - compatible: Must be "st,stm32mp1-m4"
8 - reg: Address ranges of the RETRAM and MCU SRAM memories used by the
10 - resets: Reference to a reset controller asserting the remote processor.
11 - st,syscfg-holdboot: Reference to the system configuration which holds the
12 remote processor reset hold boot
13 1st cell: phandle of syscon block
14 2nd cell: register offset containing the hold boot setting
15 3rd cell: register bitmask for the hold boot field
16 - st,syscfg-tz: Reference to the system configuration which holds the RCC trust
18 1st cell: phandle to syscon block
19 2nd cell: register offset containing the RCC trust zone mode setting
20 3rd cell: register bitmask for the RCC trust zone mode bit
23 - interrupts: Should contain the watchdog interrupt
24 - mboxes: This property is required only if the rpmsg/virtio functionality
25 is used. List of phandle and mailbox channel specifiers:
26 - a channel (a) used to communicate through virtqueues with the
28 Bi-directional channel:
29 - from local to remote = send message
30 - from remote to local = send message ack
31 - a channel (b) working the opposite direction of channel (a)
32 - a channel (c) used by the local proc to notify the remote proc
33 that it is about to be shut down.
34 Unidirectional channel:
35 - from local to remote, where ACK from the remote means
36 that it is ready for shutdown
37 - mbox-names: This property is required if the mboxes property is used.
38 - must be "vq0" for channel (a)
39 - must be "vq1" for channel (b)
40 - must be "shutdown" for channel (c)
41 - memory-region: List of phandles to the reserved memory regions associated with
42 the remoteproc device. This is variable and describes the
43 memories shared with the remote processor (eg: remoteproc
44 firmware and carveouts, rpmsg vrings, ...).
45 (see ../reserved-memory/reserved-memory.txt)
46 - st,syscfg-pdds: Reference to the system configuration which holds the remote
47 processor deep sleep setting
48 1st cell: phandle to syscon block
49 2nd cell: register offset containing the deep sleep setting
50 3rd cell: register bitmask for the deep sleep bit
51 - st,auto-boot: If defined, when remoteproc is probed, it loads the default
52 firmware and starts the remote processor.
55 m4_rproc: m4@10000000 {
56 compatible = "st,stm32mp1-m4";
57 reg = <0x10000000 0x40000>,
60 resets = <&rcc MCU_R>;
61 st,syscfg-holdboot = <&rcc 0x10C 0x1>;
62 st,syscfg-tz = <&rcc 0x000 0x1>;