1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/power/reset/syscon-poweroff.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Generic SYSCON mapped register poweroff driver 8 9maintainers: 10 - Sebastian Reichel <sre@kernel.org> 11 12description: |+ 13 This is a generic poweroff driver using syscon to map the poweroff register. 14 The poweroff is generally performed with a write to the poweroff register 15 defined by the register map pointed by syscon reference plus the offset 16 with the value and mask defined in the poweroff node. 17 Default will be little endian mode, 32 bit access only. 18 The SYSCON register map is normally retrieved from the parental dt-node. So 19 the SYSCON poweroff node should be represented as a sub-node of a "syscon", 20 "simple-mfd" node. 21 22properties: 23 compatible: 24 const: syscon-poweroff 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 poweroff 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-poweroff node being a child of a system controller node. 40 41 value: 42 $ref: /schemas/types.yaml#/definitions/uint32 43 description: The poweroff value written to the poweroff register (32 bit access). 44 45required: 46 - compatible 47 - offset 48 49additionalProperties: false 50 51allOf: 52 - if: 53 not: 54 required: 55 - mask 56 then: 57 required: 58 - value 59 60examples: 61 - | 62 poweroff { 63 compatible = "syscon-poweroff"; 64 offset = <0x0>; 65 mask = <0x7a>; 66 }; 67