xref: /linux/Documentation/devicetree/bindings/clock/imx8qxp-lpcg.yaml (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/imx8qxp-lpcg.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NXP i.MX8QXP LPCG (Low-Power Clock Gating) Clock
8
9maintainers:
10  - Aisheng Dong <aisheng.dong@nxp.com>
11
12description: |
13  The Low-Power Clock Gate (LPCG) modules contain a local programming
14  model to control the clock gates for the peripherals. An LPCG module
15  is used to locally gate the clocks for the associated peripheral.
16
17  This level of clock gating is provided after the clocks are generated
18  by the SCU resources and clock controls. Thus even if the clock is
19  enabled by these control bits, it might still not be running based
20  on the base resource.
21
22  The clock consumer should specify the desired clock by having the clock
23  ID in its "clocks" phandle cell. See the full list of clock IDs from:
24  include/dt-bindings/clock/imx8-lpcg.h
25
26properties:
27  compatible:
28    oneOf:
29      - const: fsl,imx8qxp-lpcg
30      - items:
31          - enum:
32              - fsl,imx8qm-lpcg
33          - const: fsl,imx8qxp-lpcg
34      - enum:
35          - fsl,imx8qxp-lpcg-adma
36          - fsl,imx8qxp-lpcg-conn
37          - fsl,imx8qxp-lpcg-dc
38          - fsl,imx8qxp-lpcg-dsp
39          - fsl,imx8qxp-lpcg-gpu
40          - fsl,imx8qxp-lpcg-hsio
41          - fsl,imx8qxp-lpcg-img
42          - fsl,imx8qxp-lpcg-lsio
43          - fsl,imx8qxp-lpcg-vpu
44        deprecated: true
45  reg:
46    maxItems: 1
47
48  '#clock-cells':
49    const: 1
50
51  clocks:
52    description: |
53      Input parent clocks phandle array for each clock
54    minItems: 1
55    maxItems: 8
56
57  clock-indices:
58    description: |
59      An integer array indicating the bit offset for each clock.
60      Refer to <include/dt-bindings/clock/imx8-lpcg.h> for the
61      supported LPCG clock indices.
62    minItems: 1
63    maxItems: 8
64
65  clock-output-names:
66    description: |
67      Shall be the corresponding names of the outputs.
68      NOTE this property must be specified in the same order
69      as the clock-indices property.
70    minItems: 1
71    maxItems: 8
72
73  power-domains:
74    maxItems: 1
75
76required:
77  - compatible
78  - reg
79  - '#clock-cells'
80
81additionalProperties: false
82
83examples:
84  - |
85    #include <dt-bindings/clock/imx8-lpcg.h>
86    #include <dt-bindings/firmware/imx/rsrc.h>
87    #include <dt-bindings/interrupt-controller/arm-gic.h>
88
89    sdhc0_lpcg: clock-controller@5b200000 {
90        compatible = "fsl,imx8qxp-lpcg";
91        reg = <0x5b200000 0x10000>;
92        #clock-cells = <1>;
93        clocks = <&sdhc0_clk IMX_SC_PM_CLK_PER>,
94                 <&conn_ipg_clk>,
95                 <&conn_axi_clk>;
96        clock-indices = <IMX_LPCG_CLK_0>,
97                        <IMX_LPCG_CLK_4>,
98                        <IMX_LPCG_CLK_5>;
99        clock-output-names = "sdhc0_lpcg_per_clk",
100                             "sdhc0_lpcg_ipg_clk",
101                             "sdhc0_lpcg_ahb_clk";
102        power-domains = <&pd IMX_SC_R_SDHC_0>;
103    };
104