diff options
| -rw-r--r-- | Documentation/devicetree/bindings/clock/bcm-kona-clock.txt | 93 |
1 files changed, 93 insertions, 0 deletions
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 | |||
| @@ -0,0 +1,93 @@ | |||
| 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 | }; | ||
