Merge tag 'pwm/for-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry...
[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / clock / sunxi.txt
1 Device Tree Clock bindings for arch-sunxi
2
3 This binding uses the common clock binding[1].
4
5 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
6
7 Required properties:
8 - compatible : shall be one of the following:
9         "allwinner,sun4i-a10-osc-clk" - for a gatable oscillator
10         "allwinner,sun4i-a10-pll1-clk" - for the main PLL clock and PLL4
11         "allwinner,sun6i-a31-pll1-clk" - for the main PLL clock on A31
12         "allwinner,sun8i-a23-pll1-clk" - for the main PLL clock on A23
13         "allwinner,sun4i-a10-pll5-clk" - for the PLL5 clock
14         "allwinner,sun4i-a10-pll6-clk" - for the PLL6 clock
15         "allwinner,sun6i-a31-pll6-clk" - for the PLL6 clock on A31
16         "allwinner,sun4i-a10-cpu-clk" - for the CPU multiplexer clock
17         "allwinner,sun4i-a10-axi-clk" - for the AXI clock
18         "allwinner,sun8i-a23-axi-clk" - for the AXI clock on A23
19         "allwinner,sun4i-a10-axi-gates-clk" - for the AXI gates
20         "allwinner,sun4i-a10-ahb-clk" - for the AHB clock
21         "allwinner,sun4i-a10-ahb-gates-clk" - for the AHB gates on A10
22         "allwinner,sun5i-a13-ahb-gates-clk" - for the AHB gates on A13
23         "allwinner,sun5i-a10s-ahb-gates-clk" - for the AHB gates on A10s
24         "allwinner,sun7i-a20-ahb-gates-clk" - for the AHB gates on A20
25         "allwinner,sun6i-a31-ar100-clk" - for the AR100 on A31
26         "allwinner,sun6i-a31-ahb1-mux-clk" - for the AHB1 multiplexer on A31
27         "allwinner,sun6i-a31-ahb1-gates-clk" - for the AHB1 gates on A31
28         "allwinner,sun8i-a23-ahb1-gates-clk" - for the AHB1 gates on A23
29         "allwinner,sun4i-a10-apb0-clk" - for the APB0 clock
30         "allwinner,sun6i-a31-apb0-clk" - for the APB0 clock on A31
31         "allwinner,sun8i-a23-apb0-clk" - for the APB0 clock on A23
32         "allwinner,sun4i-a10-apb0-gates-clk" - for the APB0 gates on A10
33         "allwinner,sun5i-a13-apb0-gates-clk" - for the APB0 gates on A13
34         "allwinner,sun5i-a10s-apb0-gates-clk" - for the APB0 gates on A10s
35         "allwinner,sun6i-a31-apb0-gates-clk" - for the APB0 gates on A31
36         "allwinner,sun7i-a20-apb0-gates-clk" - for the APB0 gates on A20
37         "allwinner,sun8i-a23-apb0-gates-clk" - for the APB0 gates on A23
38         "allwinner,sun4i-a10-apb1-clk" - for the APB1 clock
39         "allwinner,sun4i-a10-apb1-mux-clk" - for the APB1 clock muxing
40         "allwinner,sun4i-a10-apb1-gates-clk" - for the APB1 gates on A10
41         "allwinner,sun5i-a13-apb1-gates-clk" - for the APB1 gates on A13
42         "allwinner,sun5i-a10s-apb1-gates-clk" - for the APB1 gates on A10s
43         "allwinner,sun6i-a31-apb1-gates-clk" - for the APB1 gates on A31
44         "allwinner,sun7i-a20-apb1-gates-clk" - for the APB1 gates on A20
45         "allwinner,sun8i-a23-apb1-gates-clk" - for the APB1 gates on A23
46         "allwinner,sun6i-a31-apb2-div-clk" - for the APB2 gates on A31
47         "allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31
48         "allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
49         "allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
50         "allwinner,sun4i-a10-mmc-output-clk" - for the MMC output clock on A10
51         "allwinner,sun4i-a10-mmc-sample-clk" - for the MMC sample clock on A10
52         "allwinner,sun4i-a10-mod0-clk" - for the module 0 family of clocks
53         "allwinner,sun8i-a23-mbus-clk" - for the MBUS clock on A23
54         "allwinner,sun7i-a20-out-clk" - for the external output clocks
55         "allwinner,sun7i-a20-gmac-clk" - for the GMAC clock module on A20/A31
56         "allwinner,sun4i-a10-usb-clk" - for usb gates + resets on A10 / A20
57         "allwinner,sun5i-a13-usb-clk" - for usb gates + resets on A13
58         "allwinner,sun6i-a31-usb-clk" - for usb gates + resets on A31
59
60 Required properties for all clocks:
61 - reg : shall be the control register address for the clock.
62 - clocks : shall be the input parent clock(s) phandle for the clock. For
63         multiplexed clocks, the list order must match the hardware
64         programming order.
65 - #clock-cells : from common clock binding; shall be set to 0 except for
66         "allwinner,*-gates-clk", "allwinner,sun4i-pll5-clk" and
67         "allwinner,sun4i-pll6-clk" where it shall be set to 1
68 - clock-output-names : shall be the corresponding names of the outputs.
69         If the clock module only has one output, the name shall be the
70         module name.
71
72 And "allwinner,*-usb-clk" clocks also require:
73 - reset-cells : shall be set to 1
74
75 For "allwinner,sun7i-a20-gmac-clk", the parent clocks shall be fixed rate
76 dummy clocks at 25 MHz and 125 MHz, respectively. See example.
77
78 Clock consumers should specify the desired clocks they use with a
79 "clocks" phandle cell. Consumers that are using a gated clock should
80 provide an additional ID in their clock property. This ID is the
81 offset of the bit controlling this particular gate in the register.
82
83 For example:
84
85 osc24M: clk@01c20050 {
86         #clock-cells = <0>;
87         compatible = "allwinner,sun4i-a10-osc-clk";
88         reg = <0x01c20050 0x4>;
89         clocks = <&osc24M_fixed>;
90         clock-output-names = "osc24M";
91 };
92
93 pll1: clk@01c20000 {
94         #clock-cells = <0>;
95         compatible = "allwinner,sun4i-a10-pll1-clk";
96         reg = <0x01c20000 0x4>;
97         clocks = <&osc24M>;
98         clock-output-names = "pll1";
99 };
100
101 pll5: clk@01c20020 {
102         #clock-cells = <1>;
103         compatible = "allwinner,sun4i-pll5-clk";
104         reg = <0x01c20020 0x4>;
105         clocks = <&osc24M>;
106         clock-output-names = "pll5_ddr", "pll5_other";
107 };
108
109 cpu: cpu@01c20054 {
110         #clock-cells = <0>;
111         compatible = "allwinner,sun4i-a10-cpu-clk";
112         reg = <0x01c20054 0x4>;
113         clocks = <&osc32k>, <&osc24M>, <&pll1>;
114         clock-output-names = "cpu";
115 };
116
117 mmc0_clk: clk@01c20088 {
118         #clock-cells = <0>;
119         compatible = "allwinner,sun4i-mod0-clk";
120         reg = <0x01c20088 0x4>;
121         clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
122         clock-output-names = "mmc0";
123 };
124
125 mii_phy_tx_clk: clk@2 {
126         #clock-cells = <0>;
127         compatible = "fixed-clock";
128         clock-frequency = <25000000>;
129         clock-output-names = "mii_phy_tx";
130 };
131
132 gmac_int_tx_clk: clk@3 {
133         #clock-cells = <0>;
134         compatible = "fixed-clock";
135         clock-frequency = <125000000>;
136         clock-output-names = "gmac_int_tx";
137 };
138
139 gmac_clk: clk@01c20164 {
140         #clock-cells = <0>;
141         compatible = "allwinner,sun7i-a20-gmac-clk";
142         reg = <0x01c20164 0x4>;
143         /*
144          * The first clock must be fixed at 25MHz;
145          * the second clock must be fixed at 125MHz
146          */
147         clocks = <&mii_phy_tx_clk>, <&gmac_int_tx_clk>;
148         clock-output-names = "gmac";
149 };