xref: /linux/Documentation/devicetree/bindings/clock/hisi-crg.txt (revision 26fbb4c8c7c3ee9a4c3b4de555a8587b5a19154e) 
1* HiSilicon Clock and Reset Generator(CRG)
2
3The CRG module provides clock and reset signals to various
4modules within the SoC.
5
6This binding uses the following bindings:
7    Documentation/devicetree/bindings/clock/clock-bindings.txt
8    Documentation/devicetree/bindings/reset/reset.txt
9
10Required Properties:
11
12- compatible: should be one of the following.
13  - "hisilicon,hi3516cv300-crg"
14  - "hisilicon,hi3516cv300-sysctrl"
15  - "hisilicon,hi3519-crg"
16  - "hisilicon,hi3798cv200-crg"
17  - "hisilicon,hi3798cv200-sysctrl"
18
19- reg: physical base address of the controller and length of memory mapped
20  region.
21
22- #clock-cells: should be 1.
23
24Each clock is assigned an identifier and client nodes use this identifier
25to specify the clock which they consume.
26
27All these identifier could be found in <dt-bindings/clock/hi3519-clock.h>.
28
29- #reset-cells: should be 2.
30
31A reset signal can be controlled by writing a bit register in the CRG module.
32The reset specifier consists of two cells. The first cell represents the
33register offset relative to the base address. The second cell represents the
34bit index in the register.
35
36Example: CRG nodes
37CRG: clock-reset-controller@12010000 {
38	compatible = "hisilicon,hi3519-crg";
39	reg = <0x12010000 0x10000>;
40	#clock-cells = <1>;
41	#reset-cells = <2>;
42};
43
44Example: consumer nodes
45i2c0: i2c@12110000 {
46	compatible = "hisilicon,hi3519-i2c";
47	reg = <0x12110000 0x1000>;
48	clocks = <&CRG HI3519_I2C0_RST>;
49	resets = <&CRG 0xe4 0>;
50};
51