Merge tag 'sunxi-dt-for-3.11-2' of git://github.com/mripard/linux into next/dt
[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / clock / nvidia,tegra114-car.txt
1 NVIDIA Tegra114 Clock And Reset Controller
2
3 This binding uses the common clock binding:
4 Documentation/devicetree/bindings/clock/clock-bindings.txt
5
6 The CAR (Clock And Reset) Controller on Tegra is the HW module responsible
7 for muxing and gating Tegra's clocks, and setting their rates.
8
9 Required properties :
10 - compatible : Should be "nvidia,tegra114-car"
11 - reg : Should contain CAR registers location and length
12 - clocks : Should contain phandle and clock specifiers for two clocks:
13   the 32 KHz "32k_in", and the board-specific oscillator "osc".
14 - #clock-cells : Should be 1.
15   In clock consumers, this cell represents the clock ID exposed by the
16   CAR. The assignments may be found in header file
17   <dt-bindings/clock/tegra114-car.h>.
18
19 Example SoC include file:
20
21 / {
22         tegra_car: clock {
23                 compatible = "nvidia,tegra114-car";
24                 reg = <0x60006000 0x1000>;
25                 #clock-cells = <1>;
26         };
27
28         usb@c5004000 {
29                 clocks = <&tegra_car TEGRA114_CLK_USB2>;
30         };
31 };
32
33 Example board file:
34
35 / {
36         clocks {
37                 compatible = "simple-bus";
38                 #address-cells = <1>;
39                 #size-cells = <0>;
40
41                 osc: clock@0 {
42                         compatible = "fixed-clock";
43                         reg = <0>;
44                         #clock-cells = <0>;
45                         clock-frequency = <12000000>;
46                 };
47
48                 clk_32k: clock@1 {
49                         compatible = "fixed-clock";
50                         reg = <1>;
51                         #clock-cells = <0>;
52                         clock-frequency = <32768>;
53                 };
54         };
55
56         &tegra_car {
57                 clocks = <&clk_32k> <&osc>;
58         };
59 };