diff options
| -rw-r--r-- | Documentation/devicetree/bindings/clock/bcm-kona-clock.txt | 87 |
1 files changed, 47 insertions, 40 deletions
diff --git a/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt b/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt index 56d1f496107..ebe3ab622c8 100644 --- a/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt +++ b/Documentation/devicetree/bindings/clock/bcm-kona-clock.txt @@ -10,12 +10,12 @@ This binding uses the common clock binding: Required properties: - compatible - Shall have one of the following values: - - "brcm,bcm11351-root-ccu" - - "brcm,bcm11351-aon-ccu" - - "brcm,bcm11351-hub-ccu" - - "brcm,bcm11351-master-ccu" - - "brcm,bcm11351-slave-ccu" + Shall have a value of the form "brcm,<model>-<which>-ccu", + where <model> is a Broadcom SoC model number and <which> is + the name of a defined CCU. For example: + "brcm,bcm11351-root-ccu" + The compatible strings used for each supported SoC family + are defined below. - reg Shall define the base and range of the address space containing clock control registers @@ -26,12 +26,48 @@ Required properties: Shall be an ordered list of strings defining the names of the clocks provided by the CCU. +Device tree example: + + slave_ccu: slave_ccu { + compatible = "brcm,bcm11351-slave-ccu"; + reg = <0x3e011000 0x0f00>; + #clock-cells = <1>; + clock-output-names = "uartb", + "uartb2", + "uartb3", + "uartb4"; + }; + + ref_crystal_clk: ref_crystal { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <26000000>; + }; + + uart@3e002000 { + compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart"; + status = "disabled"; + reg = <0x3e002000 0x1000>; + clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>; + interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>; + reg-shift = <2>; + reg-io-width = <4>; + }; + +BCM281XX family +--------------- +CCU compatible string values for SoCs in the BCM281XX family are: + "brcm,bcm11351-root-ccu" + "brcm,bcm11351-aon-ccu" + "brcm,bcm11351-hub-ccu" + "brcm,bcm11351-master-ccu" + "brcm,bcm11351-slave-ccu" -BCM281XX family SoCs use Kona CCUs. The following table defines -the set of CCUs and clock specifiers for BCM281XX clocks. When -a clock consumer references a clocks, its symbolic specifier -(rather than its numeric index value) should be used. These -specifiers are defined in "include/dt-bindings/clock/bcm281xx.h". +The following table defines the set of CCUs and clock specifiers for +BCM281XX family clocks. When a clock consumer references a clocks, +its symbolic specifier (rather than its numeric index value) should +be used. These specifiers are defined in: + "include/dt-bindings/clock/bcm281xx.h" CCU Clock Type Index Specifier --- ----- ---- ----- --------- @@ -62,32 +98,3 @@ specifiers are defined in "include/dt-bindings/clock/bcm281xx.h". slave bsc2 peri 7 BCM281XX_SLAVE_CCU_BSC2 slave bsc3 peri 8 BCM281XX_SLAVE_CCU_BSC3 slave pwm peri 9 BCM281XX_SLAVE_CCU_PWM - - -Device tree example: - - slave_ccu: slave_ccu { - compatible = "brcm,bcm11351-slave-ccu"; - reg = <0x3e011000 0x0f00>; - #clock-cells = <1>; - clock-output-names = "uartb", - "uartb2", - "uartb3", - "uartb4"; - }; - - ref_crystal_clk: ref_crystal { - #clock-cells = <0>; - compatible = "fixed-clock"; - clock-frequency = <26000000>; - }; - - uart@3e002000 { - compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart"; - status = "disabled"; - reg = <0x3e002000 0x1000>; - clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>; - interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>; - reg-shift = <2>; - reg-io-width = <4>; - }; |