xref: /freebsd/sys/contrib/device-tree/Bindings/reset/hisilicon,hi3660-reset.yaml (revision 7ef62cebc2f965b0f640263e179276928885e33d) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/reset/hisilicon,hi3660-reset.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Hisilicon System Reset Controller
8
9maintainers:
10  - Wei Xu <xuwei5@hisilicon.com>
11
12description: |
13  Please also refer to reset.txt in this directory for common reset
14  controller binding usage.
15  The reset controller registers are part of the system-ctl block on
16  hi3660 and hi3670 SoCs.
17
18properties:
19  compatible:
20    oneOf:
21      - items:
22          - const: hisilicon,hi3660-reset
23      - items:
24          - const: hisilicon,hi3670-reset
25          - const: hisilicon,hi3660-reset
26
27  hisi,rst-syscon:
28    deprecated: true
29    description: phandle of the reset's syscon, use hisilicon,rst-syscon instead
30    $ref: /schemas/types.yaml#/definitions/phandle
31
32  hisilicon,rst-syscon:
33    description: phandle of the reset's syscon.
34    $ref: /schemas/types.yaml#/definitions/phandle
35
36  '#reset-cells':
37    description: |
38      Specifies the number of cells needed to encode a reset source.
39      Cell #1 : offset of the reset assert control register from the syscon
40                register base
41                offset + 4: deassert control register
42                offset + 8: status control register
43      Cell #2 : bit position of the reset in the reset control register
44    const: 2
45
46required:
47  - compatible
48
49additionalProperties: false
50
51examples:
52  - |
53    #include <dt-bindings/interrupt-controller/irq.h>
54    #include <dt-bindings/interrupt-controller/arm-gic.h>
55    #include <dt-bindings/clock/hi3660-clock.h>
56
57    iomcu: iomcu@ffd7e000 {
58        compatible = "hisilicon,hi3660-iomcu", "syscon";
59        reg = <0xffd7e000 0x1000>;
60    };
61
62    iomcu_rst: iomcu_rst_controller {
63        compatible = "hisilicon,hi3660-reset";
64        hisilicon,rst-syscon = <&iomcu>;
65        #reset-cells = <2>;
66    };
67
68    /* Specifying reset lines connected to IP modules */
69    i2c@ffd71000 {
70        compatible = "snps,designware-i2c";
71        reg = <0xffd71000 0x1000>;
72        interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
73        #address-cells = <1>;
74        #size-cells = <0>;
75        clock-frequency = <400000>;
76        clocks = <&crg_ctrl HI3660_CLK_GATE_I2C0>;
77        resets = <&iomcu_rst 0x20 3>;
78        pinctrl-names = "default";
79        pinctrl-0 = <&i2c0_pmx_func &i2c0_cfg_func>;
80    };
81...
82