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Diffstat (limited to 'Documentation/devicetree/bindings/clock/bcm-kona-clock.txt')
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diff --git a/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt b/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt new file mode 100644 index 000000000000..56d1f4961075 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt | |||
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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 one of the following values: | ||
14 | - "brcm,bcm11351-root-ccu" | ||
15 | - "brcm,bcm11351-aon-ccu" | ||
16 | - "brcm,bcm11351-hub-ccu" | ||
17 | - "brcm,bcm11351-master-ccu" | ||
18 | - "brcm,bcm11351-slave-ccu" | ||
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 | |||
30 | BCM281XX family SoCs use Kona CCUs. The following table defines | ||
31 | the set of CCUs and clock specifiers for BCM281XX clocks. When | ||
32 | a clock consumer references a clocks, its symbolic specifier | ||
33 | (rather than its numeric index value) should be used. These | ||
34 | specifiers are defined in "include/dt-bindings/clock/bcm281xx.h". | ||
35 | |||
36 | CCU Clock Type Index Specifier | ||
37 | --- ----- ---- ----- --------- | ||
38 | root frac_1m peri 0 BCM281XX_ROOT_CCU_FRAC_1M | ||
39 | |||
40 | aon hub_timer peri 0 BCM281XX_AON_CCU_HUB_TIMER | ||
41 | aon pmu_bsc peri 1 BCM281XX_AON_CCU_PMU_BSC | ||
42 | aon pmu_bsc_var peri 2 BCM281XX_AON_CCU_PMU_BSC_VAR | ||
43 | |||
44 | hub tmon_1m peri 0 BCM281XX_HUB_CCU_TMON_1M | ||
45 | |||
46 | master sdio1 peri 0 BCM281XX_MASTER_CCU_SDIO1 | ||
47 | master sdio2 peri 1 BCM281XX_MASTER_CCU_SDIO2 | ||
48 | master sdio3 peri 2 BCM281XX_MASTER_CCU_SDIO3 | ||
49 | master sdio4 peri 3 BCM281XX_MASTER_CCU_SDIO4 | ||
50 | master dmac peri 4 BCM281XX_MASTER_CCU_DMAC | ||
51 | master usb_ic peri 5 BCM281XX_MASTER_CCU_USB_IC | ||
52 | master hsic2_48m peri 6 BCM281XX_MASTER_CCU_HSIC_48M | ||
53 | master hsic2_12m peri 7 BCM281XX_MASTER_CCU_HSIC_12M | ||
54 | |||
55 | slave uartb peri 0 BCM281XX_SLAVE_CCU_UARTB | ||
56 | slave uartb2 peri 1 BCM281XX_SLAVE_CCU_UARTB2 | ||
57 | slave uartb3 peri 2 BCM281XX_SLAVE_CCU_UARTB3 | ||
58 | slave uartb4 peri 3 BCM281XX_SLAVE_CCU_UARTB4 | ||
59 | slave ssp0 peri 4 BCM281XX_SLAVE_CCU_SSP0 | ||
60 | slave ssp2 peri 5 BCM281XX_SLAVE_CCU_SSP2 | ||
61 | slave bsc1 peri 6 BCM281XX_SLAVE_CCU_BSC1 | ||
62 | slave bsc2 peri 7 BCM281XX_SLAVE_CCU_BSC2 | ||
63 | slave bsc3 peri 8 BCM281XX_SLAVE_CCU_BSC3 | ||
64 | slave pwm peri 9 BCM281XX_SLAVE_CCU_PWM | ||
65 | |||
66 | |||
67 | Device tree example: | ||
68 | |||
69 | slave_ccu: slave_ccu { | ||
70 | compatible = "brcm,bcm11351-slave-ccu"; | ||
71 | reg = <0x3e011000 0x0f00>; | ||
72 | #clock-cells = <1>; | ||
73 | clock-output-names = "uartb", | ||
74 | "uartb2", | ||
75 | "uartb3", | ||
76 | "uartb4"; | ||
77 | }; | ||
78 | |||
79 | ref_crystal_clk: ref_crystal { | ||
80 | #clock-cells = <0>; | ||
81 | compatible = "fixed-clock"; | ||
82 | clock-frequency = <26000000>; | ||
83 | }; | ||
84 | |||
85 | uart@3e002000 { | ||
86 | compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart"; | ||
87 | status = "disabled"; | ||
88 | reg = <0x3e002000 0x1000>; | ||
89 | clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>; | ||
90 | interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>; | ||
91 | reg-shift = <2>; | ||
92 | reg-io-width = <4>; | ||
93 | }; | ||