Commit | Line | Data |
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16d50f4d PDS |
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. | |
992bb598 HD |
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>. | |
07999587 SW |
18 | - #reset-cells : Should be 1. |
19 | In clock consumers, this cell represents the bit number in the CAR's | |
20 | array of CLK_RST_CONTROLLER_RST_DEVICES_* registers. | |
16d50f4d PDS |
21 | |
22 | Example SoC include file: | |
23 | ||
24 | / { | |
25 | tegra_car: clock { | |
26 | compatible = "nvidia,tegra114-car"; | |
27 | reg = <0x60006000 0x1000>; | |
28 | #clock-cells = <1>; | |
07999587 | 29 | #reset-cells = <1>; |
16d50f4d PDS |
30 | }; |
31 | ||
32 | usb@c5004000 { | |
992bb598 | 33 | clocks = <&tegra_car TEGRA114_CLK_USB2>; |
16d50f4d PDS |
34 | }; |
35 | }; | |
36 | ||
37 | Example board file: | |
38 | ||
39 | / { | |
40 | clocks { | |
41 | compatible = "simple-bus"; | |
42 | #address-cells = <1>; | |
43 | #size-cells = <0>; | |
44 | ||
45 | osc: clock@0 { | |
46 | compatible = "fixed-clock"; | |
47 | reg = <0>; | |
48 | #clock-cells = <0>; | |
49 | clock-frequency = <12000000>; | |
50 | }; | |
51 | ||
52 | clk_32k: clock@1 { | |
53 | compatible = "fixed-clock"; | |
54 | reg = <1>; | |
55 | #clock-cells = <0>; | |
56 | clock-frequency = <32768>; | |
57 | }; | |
58 | }; | |
59 | ||
60 | &tegra_car { | |
61 | clocks = <&clk_32k> <&osc>; | |
62 | }; | |
63 | }; |