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Diffstat (limited to 'Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt')
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1 | * Gated Clock bindings for Marvell Orion SoCs | ||
2 | |||
3 | Marvell Dove and Kirkwood allow some peripheral clocks to be gated to save | ||
4 | some power. The clock consumer should specify the desired clock by having | ||
5 | the clock ID in its "clocks" phandle cell. The clock ID is directly mapped to | ||
6 | the corresponding clock gating control bit in HW to ease manual clock lookup | ||
7 | in datasheet. | ||
8 | |||
9 | The following is a list of provided IDs for Armada 370: | ||
10 | ID Clock Peripheral | ||
11 | ----------------------------------- | ||
12 | 0 Audio AC97 Cntrl | ||
13 | 1 pex0_en PCIe 0 Clock out | ||
14 | 2 pex1_en PCIe 1 Clock out | ||
15 | 3 ge1 Gigabit Ethernet 1 | ||
16 | 4 ge0 Gigabit Ethernet 0 | ||
17 | 5 pex0 PCIe Cntrl 0 | ||
18 | 9 pex1 PCIe Cntrl 1 | ||
19 | 15 sata0 SATA Host 0 | ||
20 | 17 sdio SDHCI Host | ||
21 | 25 tdm Time Division Mplx | ||
22 | 28 ddr DDR Cntrl | ||
23 | 30 sata1 SATA Host 0 | ||
24 | |||
25 | The following is a list of provided IDs for Armada XP: | ||
26 | ID Clock Peripheral | ||
27 | ----------------------------------- | ||
28 | 0 audio Audio Cntrl | ||
29 | 1 ge3 Gigabit Ethernet 3 | ||
30 | 2 ge2 Gigabit Ethernet 2 | ||
31 | 3 ge1 Gigabit Ethernet 1 | ||
32 | 4 ge0 Gigabit Ethernet 0 | ||
33 | 5 pex0 PCIe Cntrl 0 | ||
34 | 6 pex1 PCIe Cntrl 1 | ||
35 | 7 pex2 PCIe Cntrl 2 | ||
36 | 8 pex3 PCIe Cntrl 3 | ||
37 | 13 bp | ||
38 | 14 sata0lnk | ||
39 | 15 sata0 SATA Host 0 | ||
40 | 16 lcd LCD Cntrl | ||
41 | 17 sdio SDHCI Host | ||
42 | 18 usb0 USB Host 0 | ||
43 | 19 usb1 USB Host 1 | ||
44 | 20 usb2 USB Host 2 | ||
45 | 22 xor0 XOR DMA 0 | ||
46 | 23 crypto CESA engine | ||
47 | 25 tdm Time Division Mplx | ||
48 | 28 xor1 XOR DMA 1 | ||
49 | 29 sata1lnk | ||
50 | 30 sata1 SATA Host 0 | ||
51 | |||
52 | The following is a list of provided IDs for Dove: | ||
53 | ID Clock Peripheral | ||
54 | ----------------------------------- | ||
55 | 0 usb0 USB Host 0 | ||
56 | 1 usb1 USB Host 1 | ||
57 | 2 ge Gigabit Ethernet | ||
58 | 3 sata SATA Host | ||
59 | 4 pex0 PCIe Cntrl 0 | ||
60 | 5 pex1 PCIe Cntrl 1 | ||
61 | 8 sdio0 SDHCI Host 0 | ||
62 | 9 sdio1 SDHCI Host 1 | ||
63 | 10 nand NAND Cntrl | ||
64 | 11 camera Camera Cntrl | ||
65 | 12 i2s0 I2S Cntrl 0 | ||
66 | 13 i2s1 I2S Cntrl 1 | ||
67 | 15 crypto CESA engine | ||
68 | 21 ac97 AC97 Cntrl | ||
69 | 22 pdma Peripheral DMA | ||
70 | 23 xor0 XOR DMA 0 | ||
71 | 24 xor1 XOR DMA 1 | ||
72 | 30 gephy Gigabit Ethernel PHY | ||
73 | Note: gephy(30) is implemented as a parent clock of ge(2) | ||
74 | |||
75 | The following is a list of provided IDs for Kirkwood: | ||
76 | ID Clock Peripheral | ||
77 | ----------------------------------- | ||
78 | 0 ge0 Gigabit Ethernet 0 | ||
79 | 2 pex0 PCIe Cntrl 0 | ||
80 | 3 usb0 USB Host 0 | ||
81 | 4 sdio SDIO Cntrl | ||
82 | 5 tsu Transp. Stream Unit | ||
83 | 6 dunit SDRAM Cntrl | ||
84 | 7 runit Runit | ||
85 | 8 xor0 XOR DMA 0 | ||
86 | 9 audio I2S Cntrl 0 | ||
87 | 14 sata0 SATA Host 0 | ||
88 | 15 sata1 SATA Host 1 | ||
89 | 16 xor1 XOR DMA 1 | ||
90 | 17 crypto CESA engine | ||
91 | 18 pex1 PCIe Cntrl 1 | ||
92 | 19 ge1 Gigabit Ethernet 0 | ||
93 | 20 tdm Time Division Mplx | ||
94 | |||
95 | Required properties: | ||
96 | - compatible : shall be one of the following: | ||
97 | "marvell,dove-gating-clock" - for Dove SoC clock gating | ||
98 | "marvell,kirkwood-gating-clock" - for Kirkwood SoC clock gating | ||
99 | - reg : shall be the register address of the Clock Gating Control register | ||
100 | - #clock-cells : from common clock binding; shall be set to 1 | ||
101 | |||
102 | Optional properties: | ||
103 | - clocks : default parent clock phandle (e.g. tclk) | ||
104 | |||
105 | Example: | ||
106 | |||
107 | gate_clk: clock-gating-control@d0038 { | ||
108 | compatible = "marvell,dove-gating-clock"; | ||
109 | reg = <0xd0038 0x4>; | ||
110 | /* default parent clock is tclk */ | ||
111 | clocks = <&core_clk 0>; | ||
112 | #clock-cells = <1>; | ||
113 | }; | ||
114 | |||
115 | sdio0: sdio@92000 { | ||
116 | compatible = "marvell,dove-sdhci"; | ||
117 | /* get clk gate bit 8 (sdio0) */ | ||
118 | clocks = <&gate_clk 8>; | ||
119 | }; | ||