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 $ref: "/schemas/types.yaml#/definitions/phandle-array"
45 description: Should contain the WWDG1 watchdog reset interrupt
52 This property is required only if the rpmsg/virtio functionality is used.
55 A channel (a) used to communicate through virtqueues with the
57 Bi-directional channel:
58 - from local to remote = send message
59 - from remote to local = send message ack
61 A channel (b) working the opposite direction of channel (a)
63 A channel (c) used by the local proc to notify the remote proc that it
64 is about to be shut down.
65 Unidirectional channel:
66 - from local to remote, where ACK from the remote means that it is
81 List of phandles to the reserved memory regions associated with the
82 remoteproc device. This is variable and describes the memories shared with
83 the remote processor (e.g. remoteproc firmware and carveouts, rpmsg
85 (see ../reserved-memory/reserved-memory.txt)
88 $ref: "/schemas/types.yaml#/definitions/phandle-array"
90 Reference to the system configuration which holds the remote
94 $ref: "/schemas/types.yaml#/definitions/phandle-array"
96 Reference to the tamp register which exposes the Cortex-M4 state.
100 $ref: "/schemas/types.yaml#/definitions/phandle-array"
102 Reference to the tamp register which references the Cortex-M4
103 resource table address.
107 $ref: /schemas/types.yaml#/definitions/flag
109 If defined, when remoteproc is probed, it loads the default firmware and
110 starts the remote processor.
119 additionalProperties: false
123 #include <dt-bindings/reset/stm32mp1-resets.h>
124 m4_rproc: m4@10000000 {
125 compatible = "st,stm32mp1-m4";
126 reg = <0x10000000 0x40000>,
127 <0x30000000 0x40000>,
128 <0x38000000 0x10000>;
129 resets = <&rcc MCU_R>;
130 st,syscfg-holdboot = <&rcc 0x10C 0x1>;
131 st,syscfg-tz = <&rcc 0x000 0x1>;
132 st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
133 st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;