# SPDX-License-Identifier: GPL-2.0 %YAML 1.2 --- $id: http://devicetree.org/schemas/mfd/syscon.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: System Controller Registers R/W description: | System controller node represents a register region containing a set of miscellaneous registers. The registers are not cohesive enough to represent as any specific type of device. The typical use-case is for some other node's driver, or platform-specific code, to acquire a reference to the syscon node (e.g. by phandle, node path, or search using a specific compatible value), interrogate the node (or associated OS driver) to determine the location of the registers, and access the registers directly. maintainers: - Lee Jones select: properties: compatible: contains: enum: - syscon required: - compatible properties: compatible: anyOf: - items: - enum: - allwinner,sun8i-a83t-system-controller - allwinner,sun8i-h3-system-controller - allwinner,sun8i-v3s-system-controller - allwinner,sun50i-a64-system-controller - amd,pensando-elba-syscon - brcm,cru-clkset - freecom,fsg-cs2-system-controller - fsl,imx93-aonmix-ns-syscfg - fsl,imx93-wakeupmix-syscfg - hisilicon,dsa-subctrl - hisilicon,hi6220-sramctrl - hisilicon,pcie-sas-subctrl - hisilicon,peri-subctrl - hpe,gxp-sysreg - intel,lgm-syscon - loongson,ls1b-syscon - loongson,ls1c-syscon - marvell,armada-3700-usb2-host-misc - mediatek,mt8135-pctl-a-syscfg - mediatek,mt8135-pctl-b-syscfg - mediatek,mt8365-syscfg - microchip,lan966x-cpu-syscon - microchip,sparx5-cpu-syscon - mstar,msc313-pmsleep - nuvoton,ma35d1-sys - nuvoton,wpcm450-shm - rockchip,px30-qos - rockchip,rk3036-qos - rockchip,rk3066-qos - rockchip,rk3128-qos - rockchip,rk3228-qos - rockchip,rk3288-qos - rockchip,rk3368-qos - rockchip,rk3399-qos - rockchip,rk3568-qos - rockchip,rk3588-qos - rockchip,rv1126-qos - starfive,jh7100-sysmain - ti,am654-dss-oldi-io-ctrl - const: syscon - contains: const: syscon minItems: 2 maxItems: 5 # Should be enough reg: maxItems: 1 reg-io-width: description: | The size (in bytes) of the IO accesses that should be performed on the device. enum: [1, 2, 4, 8] resets: maxItems: 1 hwlocks: maxItems: 1 description: Reference to a phandle of a hardware spinlock provider node. required: - compatible - reg allOf: - if: properties: compatible: contains: const: simple-mfd then: properties: compatible: minItems: 3 maxItems: 5 additionalProperties: true examples: - | syscon: syscon@1c00000 { compatible = "allwinner,sun8i-h3-system-controller", "syscon"; reg = <0x01c00000 0x1000>; }; ...