xref: /linux/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt (revision 3d886aa3be15439e05784ac1cbd4acc2f13c0048)
1* Amlogic Meson8, Meson8b and Meson8m2 Clock and Reset Unit
2
3The Amlogic Meson8 / Meson8b / Meson8m2 clock controller generates and
4supplies clock to various controllers within the SoC.
5
6Required Properties:
7
8- compatible: must be one of:
9	- "amlogic,meson8-clkc" for Meson8 (S802) SoCs
10	- "amlogic,meson8b-clkc" for Meson8 (S805) SoCs
11	- "amlogic,meson8m2-clkc" for Meson8m2 (S812) SoCs
12- reg: it must be composed by two tuples:
13	0) physical base address of the xtal register and length of memory
14	   mapped region.
15	1) physical base address of the clock controller and length of memory
16	   mapped region.
17
18- #clock-cells: should be 1.
19
20Each clock is assigned an identifier and client nodes can use this identifier
21to specify the clock which they consume. All available clocks are defined as
22preprocessor macros in the dt-bindings/clock/meson8b-clkc.h header and can be
23used in device tree sources.
24
25Example: Clock controller node:
26
27	clkc: clock-controller@c1104000 {
28		#clock-cells = <1>;
29		compatible = "amlogic,meson8b-clkc";
30		reg = <0xc1108000 0x4>, <0xc1104000 0x460>;
31	};
32
33
34Example: UART controller node that consumes the clock generated by the clock
35  controller:
36
37	uart_AO: serial@c81004c0 {
38		compatible = "amlogic,meson-uart";
39		reg = <0xc81004c0 0x14>;
40		interrupts = <0 90 1>;
41		clocks = <&clkc CLKID_CLK81>;
42		status = "disabled";
43	};
44