0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/mfd/canaan,k210-sysctl.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Canaan Kendryte K210 System Controller Device Tree Bindings
0008
0009 maintainers:
0010 - Damien Le Moal <damien.lemoal@wdc.com>
0011
0012 description:
0013 Canaan Inc. Kendryte K210 SoC system controller which provides a
0014 register map for controlling the clocks, reset signals and pin power
0015 domains of the SoC.
0016
0017 properties:
0018 compatible:
0019 items:
0020 - const: canaan,k210-sysctl
0021 - const: syscon
0022 - const: simple-mfd
0023
0024 clocks:
0025 maxItems: 1
0026 description:
0027 System controller Advanced Power Bus (APB) interface clock source.
0028
0029 clock-names:
0030 items:
0031 - const: pclk
0032
0033 reg:
0034 maxItems: 1
0035
0036 clock-controller:
0037 # Child node
0038 type: object
0039 $ref: "../clock/canaan,k210-clk.yaml"
0040 description:
0041 Clock controller for the SoC clocks. This child node definition
0042 should follow the bindings specified in
0043 Documentation/devicetree/bindings/clock/canaan,k210-clk.yaml.
0044
0045 reset-controller:
0046 # Child node
0047 type: object
0048 $ref: "../reset/canaan,k210-rst.yaml"
0049 description:
0050 Reset controller for the SoC. This child node definition
0051 should follow the bindings specified in
0052 Documentation/devicetree/bindings/reset/canaan,k210-rst.yaml.
0053
0054 syscon-reboot:
0055 # Child node
0056 type: object
0057 $ref: "../power/reset/syscon-reboot.yaml"
0058 description:
0059 Reboot method for the SoC. This child node definition
0060 should follow the bindings specified in
0061 Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml.
0062
0063 required:
0064 - compatible
0065 - clocks
0066 - reg
0067 - clock-controller
0068
0069 additionalProperties: false
0070
0071 examples:
0072 - |
0073 #include <dt-bindings/clock/k210-clk.h>
0074 #include <dt-bindings/reset/k210-rst.h>
0075
0076 clocks {
0077 in0: oscllator {
0078 compatible = "fixed-clock";
0079 #clock-cells = <0>;
0080 clock-frequency = <26000000>;
0081 };
0082 };
0083
0084 sysctl: syscon@50440000 {
0085 compatible = "canaan,k210-sysctl",
0086 "syscon", "simple-mfd";
0087 reg = <0x50440000 0x100>;
0088 clocks = <&sysclk K210_CLK_APB1>;
0089 clock-names = "pclk";
0090
0091 sysclk: clock-controller {
0092 #clock-cells = <1>;
0093 compatible = "canaan,k210-clk";
0094 clocks = <&in0>;
0095 };
0096
0097 sysrst: reset-controller {
0098 compatible = "canaan,k210-rst";
0099 #reset-cells = <1>;
0100 };
0101
0102 reboot: syscon-reboot {
0103 compatible = "syscon-reboot";
0104 regmap = <&sysctl>;
0105 offset = <48>;
0106 mask = <1>;
0107 value = <1>;
0108 };
0109 };
