Documentation/devicetree/bindings/mfd/atmel-tcb.txt

   1 * Device tree bindings for Atmel Timer Counter Blocks
   2 - compatible: Should be "atmel,<chip>-tcb", "simple-mfd", "syscon".
   3   <chip> can be "at91rm9200" or "at91sam9x5"
   4 - reg: Should contain registers location and length
   5 - #address-cells: has to be 1
   6 - #size-cells: has to be 0
   7 - interrupts: Should contain all interrupts for the TC block
   8   Note that you can specify several interrupt cells if the TC
   9   block has one interrupt per channel.
  10 - clock-names: tuple listing input clock names.
  11         Required elements: "t0_clk", "slow_clk"
  12         Optional elements: "t1_clk", "t2_clk"
  13 - clocks: phandles to input clocks.
  14
  15 The TCB can expose multiple subdevices:
  16  * a timer
  17    - compatible: Should be "atmel,tcb-timer"
  18    - reg: Should contain the TCB channels to be used. If the
  19      counter width is 16 bits (at91rm9200-tcb), two consecutive
  20      channels are needed. Else, only one channel will be used.
  21
  22 Examples:
  23
  24 One interrupt per TC block:
  25         tcb0: timer@fff7c000 {
  26                 compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
  27                 #address-cells = <1>;
  28                 #size-cells = <0>;
  29                 reg = <0xfff7c000 0x100>;
  30                 interrupts = <18 4>;
  31                 clocks = <&tcb0_clk>, <&clk32k>;
  32                 clock-names = "t0_clk", "slow_clk";
  33
  34                 timer@0 {
  35                         compatible = "atmel,tcb-timer";
  36                         reg = <0>, <1>;
  37                 };
  38
  39                 timer@2 {
  40                         compatible = "atmel,tcb-timer";
  41                         reg = <2>;
  42                 };
  43         };
  44
  45 One interrupt per TC channel in a TC block:
  46         tcb1: timer@fffdc000 {
  47                 compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
  48                 #address-cells = <1>;
  49                 #size-cells = <0>;
  50                 reg = <0xfffdc000 0x100>;
  51                 interrupts = <26 4>, <27 4>, <28 4>;
  52                 clocks = <&tcb1_clk>, <&clk32k>;
  53                 clock-names = "t0_clk", "slow_clk";
  54         };
  55
  56