Documentation/devicetree/bindings/clock/at91-clock.txt

   1 Device Tree Clock bindings for arch-at91
   2
   3 This binding uses the common clock binding[1].
   4
   5 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
   6
   7 Slow Clock controller:
   8
   9 Required properties:
  10 - compatible : shall be one of the following:
  11         "atmel,at91sam9x5-sckc" or
  12         "atmel,sama5d4-sckc":
  13                 at91 SCKC (Slow Clock Controller)
  14                 This node contains the slow clock definitions.
  15
  16         "atmel,at91sam9x5-clk-slow-osc":
  17                 at91 slow oscillator
  18
  19         "atmel,at91sam9x5-clk-slow-rc-osc":
  20                 at91 internal slow RC oscillator
  21 - reg : defines the IO memory reserved for the SCKC.
  22 - #size-cells : shall be 0 (reg is used to encode clk id).
  23 - #address-cells : shall be 1 (reg is used to encode clk id).
  24
  25
  26 For example:
  27         sckc: sckc@fffffe50 {
  28                 compatible = "atmel,sama5d3-pmc";
  29                 reg = <0xfffffe50 0x4>
  30                 #size-cells = <0>;
  31                 #address-cells = <1>;
  32
  33                 /* put at91 slow clocks here */
  34         };
  35
  36 Power Management Controller (PMC):
  37
  38 Required properties:
  39 - compatible : shall be "atmel,<chip>-pmc", "syscon":
  40         <chip> can be: at91rm9200, at91sam9260, at91sam9261,
  41         at91sam9263, at91sam9g45, at91sam9n12, at91sam9rl, at91sam9g15,
  42         at91sam9g25, at91sam9g35, at91sam9x25, at91sam9x35, at91sam9x5,
  43         sama5d2, sama5d3 or sama5d4.
  44 - #clock-cells : from common clock binding; shall be set to 2. The first entry
  45   is the type of the clock (core, system, peripheral or generated) and the
  46   second entry its index as provided by the datasheet
  47 - clocks : Must contain an entry for each entry in clock-names.
  48 - clock-names: Must include the following entries: "slow_clk", "main_xtal"
  49
  50 Optional properties:
  51 - atmel,osc-bypass : boolean property. Set this when a clock signal is directly
  52   provided on XIN.
  53
  54 For example:
  55         pmc: pmc@f0018000 {
  56                 compatible = "atmel,sama5d4-pmc", "syscon";
  57                 reg = <0xf0018000 0x120>;
  58                 interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
  59                 #clock-cells = <2>;
  60                 clocks = <&clk32k>, <&main_xtal>;
  61                 clock-names = "slow_clk", "main_xtal";
  62         };