1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 $id: "http://devicetree.org/schemas/remoteproc/st,stm32-rproc.yaml#"
5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
7 title: STMicroelectronics STM32 remote processor controller bindings
10 This document defines the binding for the remoteproc component that loads and
11 boots firmwares on the ST32MP family chipset.
14 - Fabien Dessenne <fabien.dessenne@st.com>
15 - Arnaud Pouliquen <arnaud.pouliquen@st.com>
23 Address ranges of the RETRAM and MCU SRAM memories used by the remote
31 description: remote processor reset hold boot
32 - Phandle of syscon block.
33 - The offset of the hold boot setting register.
34 - The field mask of the hold boot.
35 $ref: "/schemas/types.yaml#/definitions/phandle-array"
40 Reference to the system configuration which holds the RCC trust zone mode
41 - Phandle of syscon block.
42 - The offset of the RCC trust zone mode register.
43 - The field mask of the RCC trust zone mode.
44 $ref: "/schemas/types.yaml#/definitions/phandle-array"
48 description: Should contain the WWDG1 watchdog reset interrupt
55 This property is required only if the rpmsg/virtio functionality is used.
58 A channel (a) used to communicate through virtqueues with the
60 Bi-directional channel:
61 - from local to remote = send message
62 - from remote to local = send message ack
64 A channel (b) working the opposite direction of channel (a)
66 A channel (c) used by the local proc to notify the remote proc that it
67 is about to be shut down.
68 Unidirectional channel:
69 - from local to remote, where ACK from the remote means that it is
84 List of phandles to the reserved memory regions associated with the
85 remoteproc device. This is variable and describes the memories shared with
86 the remote processor (e.g. remoteproc firmware and carveouts, rpmsg
88 (see ../reserved-memory/reserved-memory.txt)
91 $ref: "/schemas/types.yaml#/definitions/phandle-array"
93 Reference to the system configuration which holds the remote
94 1st cell: phandle to syscon block
95 2nd cell: register offset containing the deep sleep setting
96 3rd cell: register bitmask for the deep sleep bit
100 $ref: /schemas/types.yaml#/definitions/flag
102 If defined, when remoteproc is probed, it loads the default firmware and
103 starts the remote processor.
112 additionalProperties: false
116 #include <dt-bindings/reset/stm32mp1-resets.h>
117 m4_rproc: m4@10000000 {
118 compatible = "st,stm32mp1-m4";
119 reg = <0x10000000 0x40000>,
120 <0x30000000 0x40000>,
121 <0x38000000 0x10000>;
122 resets = <&rcc MCU_R>;
123 st,syscfg-holdboot = <&rcc 0x10C 0x1>;
124 st,syscfg-tz = <&rcc 0x000 0x1>;