xref: /freebsd/sys/contrib/device-tree/Bindings/clock/ti/davinci/pll.txt (revision 924226fba12cc9a228c73b956e1b7fa24c60b055) 
1Binding for TI DaVinci PLL Controllers
2
3The PLL provides clocks to most of the components on the SoC. In addition
4to the PLL itself, this controller also contains bypasses, gates, dividers,
5an multiplexers for various clock signals.
6
7Required properties:
8- compatible: shall be one of:
9	- "ti,da850-pll0" for PLL0 on DA850/OMAP-L138/AM18XX
10	- "ti,da850-pll1" for PLL1 on DA850/OMAP-L138/AM18XX
11- reg: physical base address and size of the controller's register area.
12- clocks: phandles corresponding to the clock names
13- clock-names: names of the clock sources - depends on compatible string
14	- for "ti,da850-pll0", shall be "clksrc", "extclksrc"
15	- for "ti,da850-pll1", shall be "clksrc"
16
17Optional properties:
18- ti,clkmode-square-wave: Indicates that the the board is supplying a square
19	wave input on the OSCIN pin instead of using a crystal oscillator.
20	This property is only valid when compatible = "ti,da850-pll0".
21
22
23Optional child nodes:
24
25pllout
26	Describes the main PLL clock output (before POSTDIV). The node name must
27	be "pllout".
28
29	Required properties:
30	- #clock-cells: shall be 0
31
32sysclk
33	Describes the PLLDIVn divider clocks that provide the SYSCLKn clock
34	domains. The node name must be "sysclk". Consumers of this node should
35	use "n" in "SYSCLKn" as the index parameter for the clock cell.
36
37	Required properties:
38	- #clock-cells: shall be 1
39
40auxclk
41	Describes the AUXCLK output of the PLL. The node name must be "auxclk".
42	This child node is only valid when compatible = "ti,da850-pll0".
43
44	Required properties:
45	- #clock-cells: shall be 0
46
47obsclk
48	Describes the OBSCLK output of the PLL. The node name must be "obsclk".
49
50	Required properties:
51	- #clock-cells: shall be 0
52
53
54Examples:
55
56	pll0: clock-controller@11000 {
57		compatible = "ti,da850-pll0";
58		reg = <0x11000 0x1000>;
59		clocks = <&ref_clk>, <&pll1_sysclk 3>;
60		clock-names = "clksrc", "extclksrc";
61		ti,clkmode-square-wave;
62
63		pll0_pllout: pllout {
64			#clock-cells = <0>;
65		};
66
67		pll0_sysclk: sysclk {
68			#clock-cells = <1>;
69		};
70
71		pll0_auxclk: auxclk {
72			#clock-cells = <0>;
73		};
74
75		pll0_obsclk: obsclk {
76			#clock-cells = <0>;
77		};
78	};
79
80	pll1: clock-controller@21a000 {
81		compatible = "ti,da850-pll1";
82		reg = <0x21a000 0x1000>;
83		clocks = <&ref_clk>;
84		clock-names = "clksrc";
85
86		pll0_sysclk: sysclk {
87			#clock-cells = <1>;
88		};
89
90		pll0_obsclk: obsclk {
91			#clock-cells = <0>;
92		};
93	};
94
95Also see:
96- Documentation/devicetree/bindings/clock/clock-bindings.txt
97