Bindings/clock/artpec6.txt

   1 * Clock bindings for Axis ARTPEC-6 chip
   2
   3 The bindings are based on the clock provider binding in
   4 Documentation/devicetree/bindings/clock/clock-bindings.txt
   5
   6 External clocks:
   7 ----------------
   8
   9 There are two external inputs to the main clock controller which should be
  10 provided using the common clock bindings.
  11 - "sys_refclk": External 50 Mhz oscillator (required)
  12 - "i2s_refclk": Alternate audio reference clock (optional).
  13
  14 Main clock controller
  15 ---------------------
  16
  17 Required properties:
  18 - #clock-cells: Should be <1>
  19   See dt-bindings/clock/axis,artpec6-clkctrl.h for the list of valid identifiers.
  20 - compatible: Should be "axis,artpec6-clkctrl"
  21 - reg: Must contain the base address and length of the system controller
  22 - clocks:  Must contain a phandle entry for each clock in clock-names
  23 - clock-names: Must include the external oscillator ("sys_refclk"). Optional
  24   ones are the audio reference clock ("i2s_refclk") and the audio fractional
  25   dividers ("frac_clk0" and "frac_clk1").
  26
  27 Examples:
  28
  29 ext_clk: ext_clk {
  30         #clock-cells = <0>;
  31         compatible = "fixed-clock";
  32         clock-frequency = <50000000>;
  33 };
  34
  35 clkctrl: clkctrl@f8000000 {
  36         #clock-cells = <1>;
  37         compatible = "axis,artpec6-clkctrl";
  38         reg = <0xf8000000 0x48>;
  39         clocks = <&ext_clk>;
  40         clock-names = "sys_refclk";
  41 };