Bindings/clock/brcm,bcm2835-cprman.txt

   1 Broadcom BCM2835 CPRMAN clocks
   2
   3 This binding uses the common clock binding:
   4     Documentation/devicetree/bindings/clock/clock-bindings.txt
   5
   6 The CPRMAN clock controller generates clocks in the audio power domain
   7 of the BCM2835.  There is a level of PLLs deriving from an external
   8 oscillator, a level of PLL dividers that produce channels off of the
   9 few PLLs, and a level of mostly-generic clock generators sourcing from
  10 the PLL channels.  Most other hardware components source from the
  11 clock generators, but a few (like the ARM or HDMI) will source from
  12 the PLL dividers directly.
  13
  14 Required properties:
  15 - compatible:   should be one of the following,
  16         "brcm,bcm2711-cprman"
  17         "brcm,bcm2835-cprman"
  18 - #clock-cells: Should be <1>. The permitted clock-specifier values can be
  19                   found in include/dt-bindings/clock/bcm2835.h
  20 - reg:          Specifies base physical address and size of the registers
  21 - clocks:       phandles to the parent clocks used as input to the module, in
  22                   the following order:
  23
  24                   - External oscillator
  25                   - DSI0 byte clock
  26                   - DSI0 DDR2 clock
  27                   - DSI0 DDR clock
  28                   - DSI1 byte clock
  29                   - DSI1 DDR2 clock
  30                   - DSI1 DDR clock
  31
  32                   Only external oscillator is required.  The DSI clocks may
  33                   not be present, in which case their children will be
  34                   unusable.
  35
  36 Example:
  37
  38         clk_osc: clock@3 {
  39                 compatible = "fixed-clock";
  40                 reg = <3>;
  41                 #clock-cells = <0>;
  42                 clock-output-names = "osc";
  43                 clock-frequency = <19200000>;
  44         };
  45
  46         clocks: cprman@7e101000 {
  47                 compatible = "brcm,bcm2835-cprman";
  48                 #clock-cells = <1>;
  49                 reg = <0x7e101000 0x2000>;
  50                 clocks = <&clk_osc>;
  51         };
  52
  53         i2c0: i2c@7e205000 {
  54                 compatible = "brcm,bcm2835-i2c";
  55                 reg = <0x7e205000 0x1000>;
  56                 interrupts = <2 21>;
  57                 clocks = <&clocks BCM2835_CLOCK_VPU>;
  58                 #address-cells = <1>;
  59                 #size-cells = <0>;
  60         };