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Documentation / devicetree / bindings / clock / bcm-kona-clock.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:36 EST.

1	Broadcom Kona Family Clocks
2	
3	This binding is associated with Broadcom SoCs having "Kona" style
4	clock control units (CCUs).  A CCU is a clock provider that manages
5	a set of clock signals.  Each CCU is represented by a node in the
6	device tree.
7	
8	This binding uses the common clock binding:
9	    Documentation/devicetree/bindings/clock/clock-bindings.txt
10	
11	Required properties:
12	- compatible
13		Shall have a value of the form "brcm,<model>-<which>-ccu",
14		where <model> is a Broadcom SoC model number and <which> is
15		the name of a defined CCU.  For example:
16		    "brcm,bcm11351-root-ccu"
17		The compatible strings used for each supported SoC family
18		are defined below.
19	- reg
20		Shall define the base and range of the address space
21		containing clock control registers
22	- #clock-cells
23		Shall have value <1>.  The permitted clock-specifier values
24		are defined below.
25	- clock-output-names
26		Shall be an ordered list of strings defining the names of
27		the clocks provided by the CCU.
28	
29	Device tree example:
30	
31		slave_ccu: slave_ccu {
32			compatible = "brcm,bcm11351-slave-ccu";
33			reg = <0x3e011000 0x0f00>;
34			#clock-cells = <1>;
35			clock-output-names = "uartb",
36					     "uartb2",
37					     "uartb3",
38					     "uartb4";
39		};
40	
41		ref_crystal_clk: ref_crystal {
42			#clock-cells = <0>;
43			compatible = "fixed-clock";
44			clock-frequency = <26000000>;
45		};
46	
47		uart@3e002000 {
48			compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart";
49			status = "disabled";
50			reg = <0x3e002000 0x1000>;
51			clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>;
52			interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
53			reg-shift = <2>;
54			reg-io-width = <4>;
55		};
56	
57	BCM281XX family
58	---------------
59	CCU compatible string values for SoCs in the BCM281XX family are:
60	    "brcm,bcm11351-root-ccu"
61	    "brcm,bcm11351-aon-ccu"
62	    "brcm,bcm11351-hub-ccu"
63	    "brcm,bcm11351-master-ccu"
64	    "brcm,bcm11351-slave-ccu"
65	
66	The following table defines the set of CCUs and clock specifiers for
67	BCM281XX family clocks.  When a clock consumer references a clocks,
68	its symbolic specifier (rather than its numeric index value) should
69	be used.  These specifiers are defined in:
70	    "include/dt-bindings/clock/bcm281xx.h"
71	
72	    CCU     Clock           Type    Index   Specifier
73	    ---     -----           ----    -----   ---------
74	    root    frac_1m         peri      0     BCM281XX_ROOT_CCU_FRAC_1M
75	
76	    aon     hub_timer       peri      0     BCM281XX_AON_CCU_HUB_TIMER
77	    aon     pmu_bsc         peri      1     BCM281XX_AON_CCU_PMU_BSC
78	    aon     pmu_bsc_var     peri      2     BCM281XX_AON_CCU_PMU_BSC_VAR
79	
80	    hub     tmon_1m         peri      0     BCM281XX_HUB_CCU_TMON_1M
81	
82	    master  sdio1           peri      0     BCM281XX_MASTER_CCU_SDIO1
83	    master  sdio2           peri      1     BCM281XX_MASTER_CCU_SDIO2
84	    master  sdio3           peri      2     BCM281XX_MASTER_CCU_SDIO3
85	    master  sdio4           peri      3     BCM281XX_MASTER_CCU_SDIO4
86	    master  dmac            peri      4     BCM281XX_MASTER_CCU_DMAC
87	    master  usb_ic          peri      5     BCM281XX_MASTER_CCU_USB_IC
88	    master  hsic2_48m       peri      6     BCM281XX_MASTER_CCU_HSIC_48M
89	    master  hsic2_12m       peri      7     BCM281XX_MASTER_CCU_HSIC_12M
90	
91	    slave   uartb           peri      0     BCM281XX_SLAVE_CCU_UARTB
92	    slave   uartb2          peri      1     BCM281XX_SLAVE_CCU_UARTB2
93	    slave   uartb3          peri      2     BCM281XX_SLAVE_CCU_UARTB3
94	    slave   uartb4          peri      3     BCM281XX_SLAVE_CCU_UARTB4
95	    slave   ssp0            peri      4     BCM281XX_SLAVE_CCU_SSP0
96	    slave   ssp2            peri      5     BCM281XX_SLAVE_CCU_SSP2
97	    slave   bsc1            peri      6     BCM281XX_SLAVE_CCU_BSC1
98	    slave   bsc2            peri      7     BCM281XX_SLAVE_CCU_BSC2
99	    slave   bsc3            peri      8     BCM281XX_SLAVE_CCU_BSC3
100	    slave   pwm             peri      9     BCM281XX_SLAVE_CCU_PWM
101	
102	
103	BCM21664 family
104	---------------
105	CCU compatible string values for SoCs in the BCM21664 family are:
106	    "brcm,bcm21664-root-ccu"
107	    "brcm,bcm21664-aon-ccu"
108	    "brcm,bcm21664-master-ccu"
109	    "brcm,bcm21664-slave-ccu"
110	
111	The following table defines the set of CCUs and clock specifiers for
112	BCM21664 family clocks.  When a clock consumer references a clocks,
113	its symbolic specifier (rather than its numeric index value) should
114	be used.  These specifiers are defined in:
115	    "include/dt-bindings/clock/bcm21664.h"
116	
117	    CCU     Clock           Type    Index   Specifier
118	    ---     -----           ----    -----   ---------
119	    root    frac_1m         peri      0     BCM21664_ROOT_CCU_FRAC_1M
120	
121	    aon     hub_timer       peri      0     BCM21664_AON_CCU_HUB_TIMER
122	
123	    master  sdio1           peri      0     BCM21664_MASTER_CCU_SDIO1
124	    master  sdio2           peri      1     BCM21664_MASTER_CCU_SDIO2
125	    master  sdio3           peri      2     BCM21664_MASTER_CCU_SDIO3
126	    master  sdio4           peri      3     BCM21664_MASTER_CCU_SDIO4
127	    master  sdio1_sleep     peri      4     BCM21664_MASTER_CCU_SDIO1_SLEEP
128	    master  sdio2_sleep     peri      5     BCM21664_MASTER_CCU_SDIO2_SLEEP
129	    master  sdio3_sleep     peri      6     BCM21664_MASTER_CCU_SDIO3_SLEEP
130	    master  sdio4_sleep     peri      7     BCM21664_MASTER_CCU_SDIO4_SLEEP
131	
132	    slave   uartb           peri      0     BCM21664_SLAVE_CCU_UARTB
133	    slave   uartb2          peri      1     BCM21664_SLAVE_CCU_UARTB2
134	    slave   uartb3          peri      2     BCM21664_SLAVE_CCU_UARTB3
135	    slave   uartb4          peri      3     BCM21664_SLAVE_CCU_UARTB4
136	    slave   bsc1            peri      4     BCM21664_SLAVE_CCU_BSC1
137	    slave   bsc2            peri      5     BCM21664_SLAVE_CCU_BSC2
138	    slave   bsc3            peri      6     BCM21664_SLAVE_CCU_BSC3
139	    slave   bsc4            peri      7     BCM21664_SLAVE_CCU_BSC4
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