Documentation/devicetree/bindings/clock/ste-u300-syscon-clock.txt

   1 Clock bindings for ST-Ericsson U300 System Controller Clocks
   2
   3 Bindings for the gated system controller clocks:
   4
   5 Required properties:
   6 - compatible: must be "stericsson,u300-syscon-clk"
   7 - #clock-cells: must be <0>
   8 - clock-type: specifies the type of clock:
   9   0 = slow clock
  10   1 = fast clock
  11   2 = rest/remaining clock
  12 - clock-id: specifies the clock in the type range
  13
  14 Optional properties:
  15 - clocks: parent clock(s)
  16
  17 The available clocks per type are as follows:
  18
  19 Type:  ID:   Clock:
  20 -------------------
  21 0      0     Slow peripheral bridge clock
  22 0      1     UART0 clock
  23 0      4     GPIO clock
  24 0      6     RTC clock
  25 0      7     Application timer clock
  26 0      8     Access timer clock
  27
  28 1      0     Fast peripheral bridge clock
  29 1      1     I2C bus 0 clock
  30 1      2     I2C bus 1 clock
  31 1      5     MMC interface peripheral (silicon) clock
  32 1      6     SPI clock
  33
  34 2      3     CPU clock
  35 2      4     DMA controller clock
  36 2      5     External Memory Interface (EMIF) clock
  37 2      6     NAND flask interface clock
  38 2      8     XGAM graphics engine clock
  39 2      9     Shared External Memory Interface (SEMI) clock
  40 2      10    AHB Subsystem Bridge clock
  41 2      12    Interrupt controller clock
  42
  43 Example:
  44
  45 gpio_clk: gpio_clk@13M {
  46         #clock-cells = <0>;
  47         compatible = "stericsson,u300-syscon-clk";
  48         clock-type = <0>; /* Slow */
  49         clock-id = <4>;
  50         clocks = <&slow_clk>;
  51 };
  52
  53 gpio: gpio@c0016000 {
  54         compatible = "stericsson,gpio-coh901";
  55         (...)
  56         clocks = <&gpio_clk>;
  57 };
  58
  59
  60 Bindings for the MMC/SD card clock:
  61
  62 Required properties:
  63 - compatible: must be "stericsson,u300-syscon-mclk"
  64 - #clock-cells: must be <0>
  65
  66 Optional properties:
  67 - clocks: parent clock(s)
  68
  69 mmc_mclk: mmc_mclk {
  70         #clock-cells = <0>;
  71         compatible = "stericsson,u300-syscon-mclk";
  72         clocks = <&mmc_pclk>;
  73 };
  74
  75 mmcsd: mmcsd@c0001000 {
  76         compatible = "arm,pl18x", "arm,primecell";
  77         clocks = <&mmc_pclk>, <&mmc_mclk>;
  78         clock-names = "apb_pclk", "mclk";
  79         (...)
  80 };