tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Allwinner Clock Control Unit Binding
2------------------------------------
3
4Required properties :
5- compatible: must contain one of the following compatibles:
6 - "allwinner,sun4i-a10-ccu"
7 - "allwinner,sun5i-a10s-ccu"
8 - "allwinner,sun5i-a13-ccu"
9 - "allwinner,sun6i-a31-ccu"
10 - "allwinner,sun7i-a20-ccu"
11 - "allwinner,sun8i-a23-ccu"
12 - "allwinner,sun8i-a33-ccu"
13 - "allwinner,sun8i-a83t-ccu"
14 - "allwinner,sun8i-a83t-r-ccu"
15 - "allwinner,sun8i-h3-ccu"
16 - "allwinner,sun8i-h3-r-ccu"
17+ - "allwinner,sun8i-r40-ccu"
18 - "allwinner,sun8i-v3s-ccu"
19 - "allwinner,sun9i-a80-ccu"
20 - "allwinner,sun50i-a64-ccu"
21 - "allwinner,sun50i-a64-r-ccu"
22 - "allwinner,sun50i-h5-ccu"
23 - "allwinner,sun50i-h6-ccu"
24 - "allwinner,sun50i-h6-r-ccu"
25 - "nextthing,gr8-ccu"
26
27- reg: Must contain the registers base address and length
28- clocks: phandle to the oscillators feeding the CCU. Two are needed:
29 - "hosc": the high frequency oscillator (usually at 24MHz)
30 - "losc": the low frequency oscillator (usually at 32kHz)
31 On the A83T, this is the internal 16MHz oscillator divided by 512
32- clock-names: Must contain the clock names described just above
33- #clock-cells : must contain 1
34- #reset-cells : must contain 1
35
36For the main CCU on H6, one more clock is needed:
37- "iosc": the SoC's internal frequency oscillator
38
39For the PRCM CCUs on A83T/H3/A64/H6, two more clocks are needed:
40- "pll-periph": the SoC's peripheral PLL from the main CCU
41- "iosc": the SoC's internal frequency oscillator
42
43Example for generic CCU:
44ccu: clock@1c20000 {
45 compatible = "allwinner,sun8i-h3-ccu";
46 reg = <0x01c20000 0x400>;
47 clocks = <&osc24M>, <&osc32k>;
48 clock-names = "hosc", "losc";
49 #clock-cells = <1>;
50 #reset-cells = <1>;
51};
52
53Example for PRCM CCU:
54r_ccu: clock@1f01400 {
55 compatible = "allwinner,sun50i-a64-r-ccu";
56 reg = <0x01f01400 0x100>;
57 clocks = <&osc24M>, <&osc32k>, <&iosc>, <&ccu CLK_PLL_PERIPH0>;
58 clock-names = "hosc", "losc", "iosc", "pll-periph";
59 #clock-cells = <1>;
60 #reset-cells = <1>;
61};