| # Copyright 2024 NXP |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: | |
| System Control and Management Interface (SCMI) with doorbell |
| and shared memory (SHMEM) transport. |
| |
| Devicetree example: |
| #include <mem.h> |
| |
| scmi_res0: memory@44611000 { |
| compatible = "arm,scmi-shmem"; |
| reg = <0x44611000 0x80>; |
| }; |
| |
| mu5: mailbox@44610000 { |
| compatible = "nxp,mbox-imx-mu"; |
| reg = <0x44610000 DT_SIZE_K(4)>; |
| interrupts = <205 0>; |
| #mbox-cells = <1>; |
| }; |
| |
| scmi { |
| compatible = "arm,scmi"; |
| shmem = <&scmi_res0>; |
| mboxes = <&mu5 0>; |
| mbox-names = "tx"; |
| |
| protocol@14 { |
| compatible = "arm,scmi-clock"; |
| reg = <0x14>; |
| #clock-cells = <1>; |
| }; |
| |
| protocol@19 { |
| compatible = "arm,scmi-pinctrl"; |
| reg = <0x19>; |
| |
| pinctrl { |
| compatible = "nxp,imx95-pinctrl", "nxp,imx93-pinctrl"; |
| }; |
| }; |
| }; |
| |
| compatible: "arm,scmi" |
| |
| include: [base.yaml] |
| |
| properties: |
| shmem: |
| type: phandle |
| required: true |
| description: | |
| Phandle to node describing TX channel shared memory area. |
| This translates to a **single** SCMI transmit channel. |
| |
| mboxes: |
| required: true |
| description: | |
| List of mailbox channel specifiers. It should contain one or two specifiers: |
| 1) tx - 1 mbox / 1 shmem (platform and agent use the same |
| mailbox channel for signaling) |
| 2) tx_reply - 2 mbox / 1 shmem (platform and agent use different |
| mailbox channels for signaling) |
| |
| mbox-names: |
| required: true |
| description: mailbox channel specifier names |
