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
41 - microchip,sparx5-cpu-syscon
42 - mstar,msc313-pmsleep
49 maxItems: 4 # Should be enough
56 The size (in bytes) of the IO accesses that should be performed
58 $ref: /schemas/types.yaml#/definitions/uint32
64 Reference to a phandle of a hardware spinlock provider node.
70 unevaluatedProperties: false
74 syscon: syscon@1c00000 {
75 compatible = "allwinner,sun8i-h3-system-controller", "syscon";
76 reg = <0x01c00000 0x1000>;
80 gpr: iomuxc-gpr@20e0000 {
81 compatible = "fsl,imx6q-iomuxc-gpr", "syscon";
82 reg = <0x020e0000 0x38>;
83 hwlocks = <&hwlock1 1>;