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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/mfd/syscon-common.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: System Controller Registers R/W Common Properties8 9description:10 System controller node represents a register region containing a set11 of miscellaneous registers. The registers are not cohesive enough to12 represent as any specific type of device. The typical use-case is13 for some other node's driver, or platform-specific code, to acquire14 a reference to the syscon node (e.g. by phandle, node path, or15 search using a specific compatible value), interrogate the node (or16 associated OS driver) to determine the location of the registers,17 and access the registers directly.18 19maintainers:20 - Lee Jones <lee@kernel.org>21 22select:23 properties:24 compatible:25 contains:26 const: syscon27 28 required:29 - compatible30 31properties:32 compatible:33 contains:34 const: syscon35 minItems: 236 maxItems: 5 # Should be enough37 38 reg:39 maxItems: 140 41 reg-io-width:42 description:43 The size (in bytes) of the IO accesses that should be performed44 on the device.45 enum: [1, 2, 4, 8]46 47required:48 - compatible49 - reg50 51allOf:52 - if:53 properties:54 compatible:55 contains:56 const: simple-mfd57 then:58 properties:59 compatible:60 minItems: 361 maxItems: 562 63additionalProperties: true64 65examples:66 - |67 syscon: syscon@1c00000 {68 compatible = "allwinner,sun8i-h3-system-controller", "syscon";69 reg = <0x01c00000 0x1000>;70 };71...72