1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2# Copyright 2019 BayLibre, SAS 3%YAML 1.2 4--- 5$id: http://devicetree.org/schemas/arm/amlogic/amlogic,meson-gx-ao-secure.yaml# 6$schema: http://devicetree.org/meta-schemas/core.yaml# 7 8title: Amlogic Meson Firmware registers Interface 9 10maintainers: 11 - Neil Armstrong <neil.armstrong@linaro.org> 12 13description: | 14 The Meson SoCs have a register bank with status and data shared with the 15 secure firmware. 16 17# We need a select here so we don't match all nodes with 'syscon' 18select: 19 properties: 20 compatible: 21 contains: 22 const: amlogic,meson-gx-ao-secure 23 required: 24 - compatible 25 26properties: 27 compatible: 28 items: 29 - const: amlogic,meson-gx-ao-secure 30 - const: syscon 31 32 reg: 33 maxItems: 1 34 35 amlogic,has-chip-id: 36 description: | 37 A firmware register encodes the SoC type, package and revision 38 information on the Meson GX SoCs. If present, the interface gives 39 the current SoC version. 40 type: boolean 41 42required: 43 - compatible 44 - reg 45 46additionalProperties: false 47 48examples: 49 - | 50 ao-secure@140 { 51 compatible = "amlogic,meson-gx-ao-secure", "syscon"; 52 reg = <0x140 0x140>; 53 amlogic,has-chip-id; 54 }; 55