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,ls1021a-clockgen"
35 * "fsl,ls1043a-clockgen"
36 * "fsl,ls1046a-clockgen"
37 * "fsl,ls2080a-clockgen"
38 Chassis-version clock strings include:
39 * "fsl,qoriq-clockgen-1.0": for chassis 1.0 clocks
40 * "fsl,qoriq-clockgen-2.0": for chassis 2.0 clocks
41 - reg: Describes the address of the device's resources within the
42 address space defined by its parent bus, and resource zero
43 represents the clock register set
46 - ranges: Allows valid translation between child's address space and
47 parent's. Must be present if the device has sub-nodes.
48 - #address-cells: Specifies the number of cells used to represent
49 physical base addresses. Must be present if the device has
50 sub-nodes and set to 1 if present
51 - #size-cells: Specifies the number of cells used to represent
52 the size of an address. Must be present if the device has
53 sub-nodes and set to 1 if present
54 - clock-frequency: Input system clock frequency (SYSCLK)
55 - clocks: If clock-frequency is not specified, sysclk may be provided
56 as an input clock. Either clock-frequency or clocks must be
61 The clockgen node should act as a clock provider, though in older device
62 trees the children of the clockgen node are the clock providers.
64 When the clockgen node is a clock provider, #clock-cells = <2>.
65 The first cell of the clock specifier is the clock type, and the
66 second cell is the clock index for the specified type.
70 1 cmux index (n in CLKCnCSR)
71 2 hwaccel index (n in CLKCGnHWACSR)
72 3 fman 0 for fm1, 1 for fm2
73 4 platform pll 0=pll, 1=pll/2, 2=pll/3, 3=pll/4
77 clockgen: global-utilities@e1000 {
78 compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
79 clock-frequency = <133333333>;
80 reg = <0xe1000 0x1000>;
86 clocks = <&clockgen 3 0>;
92 NOTE: These nodes are deprecated. Kernels should continue to support
93 device trees with these nodes, but new device trees should not use them.
95 Most of the bindings are from the common clock binding[1].
96 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
99 - compatible : Should include one of the following:
100 * "fsl,qoriq-core-pll-1.0" for core PLL clocks (v1.0)
101 * "fsl,qoriq-core-pll-2.0" for core PLL clocks (v2.0)
102 * "fsl,qoriq-core-mux-1.0" for core mux clocks (v1.0)
103 * "fsl,qoriq-core-mux-2.0" for core mux clocks (v2.0)
104 * "fsl,qoriq-sysclk-1.0": for input system clock (v1.0).
105 It takes parent's clock-frequency as its clock.
106 * "fsl,qoriq-sysclk-2.0": for input system clock (v2.0).
107 It takes parent's clock-frequency as its clock.
108 * "fsl,qoriq-platform-pll-1.0" for the platform PLL clock (v1.0)
109 * "fsl,qoriq-platform-pll-2.0" for the platform PLL clock (v2.0)
110 - #clock-cells: From common clock binding. The number of cells in a
111 clock-specifier. Should be <0> for "fsl,qoriq-sysclk-[1,2].0"
112 clocks, or <1> for "fsl,qoriq-core-pll-[1,2].0" clocks.
113 For "fsl,qoriq-core-pll-[1,2].0" clocks, the single
114 clock-specifier cell may take the following values:
115 * 0 - equal to the PLL frequency
116 * 1 - equal to the PLL frequency divided by 2
117 * 2 - equal to the PLL frequency divided by 4
119 Recommended properties:
120 - clocks: Should be the phandle of input parent clock
121 - clock-names: From common clock binding, indicates the clock name
122 - clock-output-names: From common clock binding, indicates the names of
124 - reg: Should be the offset and length of clock block base address.
125 The length should be 4.
129 clockgen: global-utilities@e1000 {
130 compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
131 ranges = <0x0 0xe1000 0x1000>;
132 clock-frequency = <133333333>;
133 reg = <0xe1000 0x1000>;
134 #address-cells = <1>;
139 compatible = "fsl,qoriq-sysclk-1.0";
140 clock-output-names = "sysclk";
146 compatible = "fsl,qoriq-core-pll-1.0";
148 clock-output-names = "pll0", "pll0-div2";
154 compatible = "fsl,qoriq-core-pll-1.0";
156 clock-output-names = "pll1", "pll1-div2";
162 compatible = "fsl,qoriq-core-mux-1.0";
163 clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
164 clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
165 clock-output-names = "cmux0";
171 compatible = "fsl,qoriq-core-mux-1.0";
172 clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
173 clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
174 clock-output-names = "cmux1";
177 platform-pll: platform-pll@c00 {
180 compatible = "fsl,qoriq-platform-pll-1.0";
182 clock-output-names = "platform-pll", "platform-pll-div2";
187 Example for legacy clock consumer:
190 cpu0: PowerPC,e5500@0 {