1 * Clock Block on Freescale QorIQ Platforms
3 Freescale QorIQ chips take primary clocking input from the external
4 SYSCLK signal. The SYSCLK input (frequency) is multiplied using
5 multiple phase locked loops (PLL) to create a variety of frequencies
6 which can then be passed to a variety of internal logic, including
7 cores and peripheral IP blocks.
8 Please refer to the Reference Manual for details.
10 All references to "1.0" and "2.0" refer to the QorIQ chassis version to
11 which the chip complies.
13 Chassis Version Example Chips
14 --------------- -------------
15 1.0 p4080, p5020, p5040
18 1. Clock Block Binding
21 - compatible: Should contain a chip-specific clock block compatible
22 string and (if applicable) may contain a chassis-version clock
25 Chip-specific strings are of the form "fsl,<chip>-clockgen", such as:
26 * "fsl,p2041-clockgen"
27 * "fsl,p3041-clockgen"
28 * "fsl,p4080-clockgen"
29 * "fsl,p5020-clockgen"
30 * "fsl,p5040-clockgen"
31 * "fsl,t4240-clockgen"
32 * "fsl,b4420-clockgen"
33 * "fsl,b4860-clockgen"
34 * "fsl,ls1012a-clockgen"
35 * "fsl,ls1021a-clockgen"
36 * "fsl,ls1043a-clockgen"
37 * "fsl,ls1046a-clockgen"
38 * "fsl,ls2080a-clockgen"
39 Chassis-version clock strings include:
40 * "fsl,qoriq-clockgen-1.0": for chassis 1.0 clocks
41 * "fsl,qoriq-clockgen-2.0": for chassis 2.0 clocks
42 - reg: Describes the address of the device's resources within the
43 address space defined by its parent bus, and resource zero
44 represents the clock register set
47 - ranges: Allows valid translation between child's address space and
48 parent's. Must be present if the device has sub-nodes.
49 - #address-cells: Specifies the number of cells used to represent
50 physical base addresses. Must be present if the device has
51 sub-nodes and set to 1 if present
52 - #size-cells: Specifies the number of cells used to represent
53 the size of an address. Must be present if the device has
54 sub-nodes and set to 1 if present
55 - clock-frequency: Input system clock frequency (SYSCLK)
56 - clocks: If clock-frequency is not specified, sysclk may be provided
57 as an input clock. Either clock-frequency or clocks must be
62 The clockgen node should act as a clock provider, though in older device
63 trees the children of the clockgen node are the clock providers.
65 When the clockgen node is a clock provider, #clock-cells = <2>.
66 The first cell of the clock specifier is the clock type, and the
67 second cell is the clock index for the specified type.
71 1 cmux index (n in CLKCnCSR)
72 2 hwaccel index (n in CLKCGnHWACSR)
73 3 fman 0 for fm1, 1 for fm2
74 4 platform pll 0=pll, 1=pll/2, 2=pll/3, 3=pll/4
78 clockgen: global-utilities@e1000 {
79 compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
80 clock-frequency = <133333333>;
81 reg = <0xe1000 0x1000>;
87 clocks = <&clockgen 3 0>;
93 NOTE: These nodes are deprecated. Kernels should continue to support
94 device trees with these nodes, but new device trees should not use them.
96 Most of the bindings are from the common clock binding[1].
97 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
100 - compatible : Should include one of the following:
101 * "fsl,qoriq-core-pll-1.0" for core PLL clocks (v1.0)
102 * "fsl,qoriq-core-pll-2.0" for core PLL clocks (v2.0)
103 * "fsl,qoriq-core-mux-1.0" for core mux clocks (v1.0)
104 * "fsl,qoriq-core-mux-2.0" for core mux clocks (v2.0)
105 * "fsl,qoriq-sysclk-1.0": for input system clock (v1.0).
106 It takes parent's clock-frequency as its clock.
107 * "fsl,qoriq-sysclk-2.0": for input system clock (v2.0).
108 It takes parent's clock-frequency as its clock.
109 * "fsl,qoriq-platform-pll-1.0" for the platform PLL clock (v1.0)
110 * "fsl,qoriq-platform-pll-2.0" for the platform PLL clock (v2.0)
111 - #clock-cells: From common clock binding. The number of cells in a
112 clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0"
113 clocks, or <1> for "fsl,qoriq-core-pll-[1,2].0" clocks.
114 For "fsl,qoriq-core-pll-[1,2].0" clocks, the single
115 clock-specifier cell may take the following values:
116 * 0 - equal to the PLL frequency
117 * 1 - equal to the PLL frequency divided by 2
118 * 2 - equal to the PLL frequency divided by 4
120 Recommended properties:
121 - clocks: Should be the phandle of input parent clock
122 - clock-names: From common clock binding, indicates the clock name
123 - clock-output-names: From common clock binding, indicates the names of
125 - reg: Should be the offset and length of clock block base address.
126 The length should be 4.
130 clockgen: global-utilities@e1000 {
131 compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
132 ranges = <0x0 0xe1000 0x1000>;
133 clock-frequency = <133333333>;
134 reg = <0xe1000 0x1000>;
135 #address-cells = <1>;
140 compatible = "fsl,qoriq-sysclk-1.0";
141 clock-output-names = "sysclk";
147 compatible = "fsl,qoriq-core-pll-1.0";
149 clock-output-names = "pll0", "pll0-div2";
155 compatible = "fsl,qoriq-core-pll-1.0";
157 clock-output-names = "pll1", "pll1-div2";
163 compatible = "fsl,qoriq-core-mux-1.0";
164 clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
165 clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
166 clock-output-names = "cmux0";
172 compatible = "fsl,qoriq-core-mux-1.0";
173 clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
174 clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
175 clock-output-names = "cmux1";
178 platform-pll: platform-pll@c00 {
181 compatible = "fsl,qoriq-platform-pll-1.0";
183 clock-output-names = "platform-pll", "platform-pll-div2";
188 Example for legacy clock consumer:
191 cpu0: PowerPC,e5500@0 {