| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 8 | title: Amlogic Meson Firmware registers Interface |
| 9 | |
| 10 | maintainers: |
| 11 | - Neil Armstrong <neil.armstrong@linaro.org> |
| 12 | |
| 13 | description: | |
| 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' |
| 18 | select: |
| 19 | properties: |
| 20 | compatible: |
| 21 | contains: |
| 22 | const: amlogic,meson-gx-ao-secure |
| 23 | required: |
| 24 | - compatible |
| 25 | |
| 26 | properties: |
| 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 | |
| 42 | required: |
| 43 | - compatible |
| 44 | - reg |
| 45 | |
| 46 | additionalProperties: false |
| 47 | |
| 48 | examples: |
| 49 | - | |
| 50 | ao-secure@140 { |
| 51 | compatible = "amlogic,meson-gx-ao-secure", "syscon"; |
| 52 | reg = <0x140 0x140>; |
| 53 | amlogic,has-chip-id; |
| 54 | }; |