1 # SPDX-License-Identifier: GPL-2.0
4 $id: http://devicetree.org/schemas/mfd/syscon.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: System Controller Registers R/W Device Tree Bindings
10 System controller node represents a register region containing a set
11 of miscellaneous registers. The registers are not cohesive enough to
12 represent as any specific type of device. The typical use-case is
13 for some other node's driver, or platform-specific code, to acquire
14 a reference to the syscon node (e.g. by phandle, node path, or
15 search using a specific compatible value), interrogate the node (or
16 associated OS driver) to determine the location of the registers,
17 and access the registers directly.
20 - Lee Jones <lee.jones@linaro.org>
37 - allwinner,sun8i-a83t-system-controller
38 - allwinner,sun8i-h3-system-controller
39 - allwinner,sun8i-v3s-system-controller
40 - allwinner,sun50i-a64-system-controller
42 - freecom,fsg-cs2-system-controller
43 - hisilicon,dsa-subctrl
44 - hisilicon,hi6220-sramctrl
45 - hisilicon,pcie-sas-subctrl
46 - hisilicon,peri-subctrl
48 - marvell,armada-3700-usb2-host-misc
49 - mediatek,mt8135-pctl-a-syscfg
50 - mediatek,mt8135-pctl-b-syscfg
51 - microchip,lan966x-cpu-syscon
52 - microchip,sparx5-cpu-syscon
53 - mstar,msc313-pmsleep
62 - samsung,exynos3-sysreg
63 - samsung,exynos4-sysreg
64 - samsung,exynos5-sysreg
65 - samsung,exynos5433-sysreg
66 - samsung,exynos850-sysreg
67 - samsung,exynosautov9-sysreg
74 maxItems: 4 # Should be enough
81 The size (in bytes) of the IO accesses that should be performed
83 $ref: /schemas/types.yaml#/definitions/uint32
89 Reference to a phandle of a hardware spinlock provider node.
95 additionalProperties: true
99 syscon: syscon@1c00000 {
100 compatible = "allwinner,sun8i-h3-system-controller", "syscon";
101 reg = <0x01c00000 0x1000>;