FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/clock/ste-u300-syscon-clock.txt

     Clock bindings for ST-Ericsson U300 System Controller Clocks
     
     Bindings for the gated system controller clocks:
     
     Required properties:
     - compatible: must be "stericsson,u300-syscon-clk"
     - #clock-cells: must be <0>
     - clock-type: specifies the type of clock:
       0 = slow clock
      1 = fast clock
      2 = rest/remaining clock
    - clock-id: specifies the clock in the type range
    
    Optional properties:
    - clocks: parent clock(s)
    
    The available clocks per type are as follows:
    
    Type:  ID:   Clock:
    -------------------
    0      0     Slow peripheral bridge clock
    0      1     UART0 clock
    0      4     GPIO clock
    0      6     RTC clock
    0      7     Application timer clock
    0      8     Access timer clock
    
    1      0     Fast peripheral bridge clock
    1      1     I2C bus 0 clock
    1      2     I2C bus 1 clock
    1      5     MMC interface peripheral (silicon) clock
    1      6     SPI clock
    
    2      3     CPU clock
    2      4     DMA controller clock
    2      5     External Memory Interface (EMIF) clock
    2      6     NAND flask interface clock
    2      8     XGAM graphics engine clock
    2      9     Shared External Memory Interface (SEMI) clock
    2      10    AHB Subsystem Bridge clock
    2      12    Interrupt controller clock
    
    Example:
    
    gpio_clk: gpio_clk@13M {
            #clock-cells = <0>;
            compatible = "stericsson,u300-syscon-clk";
            clock-type = <0>; /* Slow */
            clock-id = <4>;
            clocks = <&slow_clk>;
    };
    
    gpio: gpio@c0016000 {
            compatible = "stericsson,gpio-coh901";
            (...)
            clocks = <&gpio_clk>;
    };
    
    
    Bindings for the MMC/SD card clock:
    
    Required properties:
    - compatible: must be "stericsson,u300-syscon-mclk"
    - #clock-cells: must be <0>
    
    Optional properties:
    - clocks: parent clock(s)
    
    mmc_mclk: mmc_mclk {
            #clock-cells = <0>;
            compatible = "stericsson,u300-syscon-mclk";
            clocks = <&mmc_pclk>;
    };
    
    mmcsd: mmcsd@c0001000 {
            compatible = "arm,pl18x", "arm,primecell";
            clocks = <&mmc_pclk>, <&mmc_mclk>;
            clock-names = "apb_pclk", "mclk";
            (...)
    };

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