1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/firmware/thead,th1520-aon.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: T-HEAD TH1520 AON (Always-On) Firmware 8 9description: | 10 The Always-On (AON) subsystem in the TH1520 SoC is responsible for managing 11 low-power states, system wakeup events, and power management tasks. It is 12 designed to operate independently in a dedicated power domain, allowing it to 13 remain functional even during the SoC's deep sleep states. 14 15 At the heart of the AON subsystem is the E902, a low-power core that executes 16 firmware responsible for coordinating tasks such as power domain control, 17 clock management, and system wakeup signaling. Communication between the main 18 SoC and the AON subsystem is handled through a mailbox interface, which 19 enables message-based interactions with the AON firmware. 20 21maintainers: 22 - Michal Wilczynski <m.wilczynski@samsung.com> 23 24properties: 25 compatible: 26 const: thead,th1520-aon 27 28 mboxes: 29 maxItems: 1 30 31 mbox-names: 32 items: 33 - const: aon 34 35 "#power-domain-cells": 36 const: 1 37 38required: 39 - compatible 40 - mboxes 41 - mbox-names 42 - "#power-domain-cells" 43 44additionalProperties: false 45 46examples: 47 - | 48 aon: aon { 49 compatible = "thead,th1520-aon"; 50 mboxes = <&mbox_910t 1>; 51 mbox-names = "aon"; 52 #power-domain-cells = <1>; 53 }; 54