1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/power/reset/syscon-reboot.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Generic SYSCON mapped register reset driver 8 9maintainers: 10 - Sebastian Reichel <sre@kernel.org> 11 12description: |+ 13 This is a generic reset driver using syscon to map the reset register. 14 The reset is generally performed with a write to the reset register 15 defined by the SYSCON register map base plus the offset with the value and 16 mask defined in the reboot node. Default will be little endian mode, 32 bit 17 access only. The SYSCON registers map is normally retrieved from the 18 parental dt-node. So the SYSCON reboot node should be represented as a 19 sub-node of a "syscon", "simple-mfd" node. Though the regmap property 20 pointing to the system controller node is also supported. 21 22properties: 23 compatible: 24 const: syscon-reboot 25 26 mask: 27 $ref: /schemas/types.yaml#/definitions/uint32 28 description: Update only the register bits defined by the mask (32 bit). 29 30 offset: 31 $ref: /schemas/types.yaml#/definitions/uint32 32 description: Offset in the register map for the reboot register (in bytes). 33 34 regmap: 35 $ref: /schemas/types.yaml#/definitions/phandle 36 deprecated: true 37 description: | 38 Phandle to the register map node. This property is deprecated in favor of 39 the syscon-reboot node been a child of a system controller node. 40 41 value: 42 $ref: /schemas/types.yaml#/definitions/uint32 43 description: The reset value written to the reboot register (32 bit access). 44 45 priority: 46 default: 192 47 48required: 49 - compatible 50 - offset 51 52additionalProperties: false 53 54allOf: 55 - $ref: restart-handler.yaml# 56 - if: 57 not: 58 required: 59 - mask 60 then: 61 required: 62 - value 63 64examples: 65 - | 66 reboot { 67 compatible = "syscon-reboot"; 68 regmap = <®mapnode>; 69 offset = <0x0>; 70 mask = <0x1>; 71 }; 72