brcm,kona-ccu.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 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                 reg = <0x3e002000 0x1000>;
   50                 clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>;
   51                 interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
   52                 reg-shift = <2>;
   53                 reg-io-width = <4>;
   54         };
   55 
   56 BCM281XX family
   57 ---------------
   58 CCU compatible string values for SoCs in the BCM281XX family are:
   59     "brcm,bcm11351-root-ccu"
   60     "brcm,bcm11351-aon-ccu"
   61     "brcm,bcm11351-hub-ccu"
   62     "brcm,bcm11351-master-ccu"
   63     "brcm,bcm11351-slave-ccu"
   64 
   65 The following table defines the set of CCUs and clock specifiers for
   66 BCM281XX family clocks.  When a clock consumer references a clocks,
   67 its symbolic specifier (rather than its numeric index value) should
   68 be used.  These specifiers are defined in:
   69     "include/dt-bindings/clock/bcm281xx.h"
   70 
   71     CCU     Clock           Type    Index   Specifier
   72     ---     -----           ----    -----   ---------
   73     root    frac_1m         peri      0     BCM281XX_ROOT_CCU_FRAC_1M
   74 
   75     aon     hub_timer       peri      0     BCM281XX_AON_CCU_HUB_TIMER
   76     aon     pmu_bsc         peri      1     BCM281XX_AON_CCU_PMU_BSC
   77     aon     pmu_bsc_var     peri      2     BCM281XX_AON_CCU_PMU_BSC_VAR
   78 
   79     hub     tmon_1m         peri      0     BCM281XX_HUB_CCU_TMON_1M
   80 
   81     master  sdio1           peri      0     BCM281XX_MASTER_CCU_SDIO1
   82     master  sdio2           peri      1     BCM281XX_MASTER_CCU_SDIO2
   83     master  sdio3           peri      2     BCM281XX_MASTER_CCU_SDIO3
   84     master  sdio4           peri      3     BCM281XX_MASTER_CCU_SDIO4
   85     master  dmac            peri      4     BCM281XX_MASTER_CCU_DMAC
   86     master  usb_ic          peri      5     BCM281XX_MASTER_CCU_USB_IC
   87     master  hsic2_48m       peri      6     BCM281XX_MASTER_CCU_HSIC_48M
   88     master  hsic2_12m       peri      7     BCM281XX_MASTER_CCU_HSIC_12M
   89 
   90     slave   uartb           peri      0     BCM281XX_SLAVE_CCU_UARTB
   91     slave   uartb2          peri      1     BCM281XX_SLAVE_CCU_UARTB2
   92     slave   uartb3          peri      2     BCM281XX_SLAVE_CCU_UARTB3
   93     slave   uartb4          peri      3     BCM281XX_SLAVE_CCU_UARTB4
   94     slave   ssp0            peri      4     BCM281XX_SLAVE_CCU_SSP0
   95     slave   ssp2            peri      5     BCM281XX_SLAVE_CCU_SSP2
   96     slave   bsc1            peri      6     BCM281XX_SLAVE_CCU_BSC1
   97     slave   bsc2            peri      7     BCM281XX_SLAVE_CCU_BSC2
   98     slave   bsc3            peri      8     BCM281XX_SLAVE_CCU_BSC3
   99     slave   pwm             peri      9     BCM281XX_SLAVE_CCU_PWM
  100 
  101 
  102 BCM21664 family
  103 ---------------
  104 CCU compatible string values for SoCs in the BCM21664 family are:
  105     "brcm,bcm21664-root-ccu"
  106     "brcm,bcm21664-aon-ccu"
  107     "brcm,bcm21664-master-ccu"
  108     "brcm,bcm21664-slave-ccu"
  109 
  110 The following table defines the set of CCUs and clock specifiers for
  111 BCM21664 family clocks.  When a clock consumer references a clocks,
  112 its symbolic specifier (rather than its numeric index value) should
  113 be used.  These specifiers are defined in:
  114     "include/dt-bindings/clock/bcm21664.h"
  115 
  116     CCU     Clock           Type    Index   Specifier
  117     ---     -----           ----    -----   ---------
  118     root    frac_1m         peri      0     BCM21664_ROOT_CCU_FRAC_1M
  119 
  120     aon     hub_timer       peri      0     BCM21664_AON_CCU_HUB_TIMER
  121 
  122     master  sdio1           peri      0     BCM21664_MASTER_CCU_SDIO1
  123     master  sdio2           peri      1     BCM21664_MASTER_CCU_SDIO2
  124     master  sdio3           peri      2     BCM21664_MASTER_CCU_SDIO3
  125     master  sdio4           peri      3     BCM21664_MASTER_CCU_SDIO4
  126     master  sdio1_sleep     peri      4     BCM21664_MASTER_CCU_SDIO1_SLEEP
  127     master  sdio2_sleep     peri      5     BCM21664_MASTER_CCU_SDIO2_SLEEP
  128     master  sdio3_sleep     peri      6     BCM21664_MASTER_CCU_SDIO3_SLEEP
  129     master  sdio4_sleep     peri      7     BCM21664_MASTER_CCU_SDIO4_SLEEP
  130 
  131     slave   uartb           peri      0     BCM21664_SLAVE_CCU_UARTB
  132     slave   uartb2          peri      1     BCM21664_SLAVE_CCU_UARTB2
  133     slave   uartb3          peri      2     BCM21664_SLAVE_CCU_UARTB3
  134     slave   uartb4          peri      3     BCM21664_SLAVE_CCU_UARTB4
  135     slave   bsc1            peri      4     BCM21664_SLAVE_CCU_BSC1
  136     slave   bsc2            peri      5     BCM21664_SLAVE_CCU_BSC2
  137     slave   bsc3            peri      6     BCM21664_SLAVE_CCU_BSC3
  138     slave   bsc4            peri      7     BCM21664_SLAVE_CCU_BSC4

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