Documentation/devicetree/bindings/timer/ingenic,tcu.txt

   1 Ingenic JZ47xx SoCs Timer/Counter Unit devicetree bindings
   2 ==========================================================
   3
   4 For a description of the TCU hardware and drivers, have a look at
   5 Documentation/mips/ingenic-tcu.txt.
   6
   7 Required properties:
   8
   9 - compatible: Must be one of:
  10   * ingenic,jz4740-tcu
  11   * ingenic,jz4725b-tcu
  12   * ingenic,jz4770-tcu
  13   followed by "simple-mfd".
  14 - reg: Should be the offset/length value corresponding to the TCU registers
  15 - clocks: List of phandle & clock specifiers for clocks external to the TCU.
  16   The "pclk", "rtc" and "ext" clocks should be provided. The "tcu" clock
  17   should be provided if the SoC has it.
  18 - clock-names: List of name strings for the external clocks.
  19 - #clock-cells: Should be <1>;
  20   Clock consumers specify this argument to identify a clock. The valid values
  21   may be found in <dt-bindings/clock/ingenic,tcu.h>.
  22 - interrupt-controller : Identifies the node as an interrupt controller
  23 - #interrupt-cells : Specifies the number of cells needed to encode an
  24   interrupt source. The value should be 1.
  25 - interrupts : Specifies the interrupt the controller is connected to.
  26
  27 Optional properties:
  28
  29 - ingenic,pwm-channels-mask: Bitmask of TCU channels reserved for PWM use.
  30   Default value is 0xfc.
  31
  32
  33 Children nodes
  34 ==========================================================
  35
  36
  37 PWM node:
  38 ---------
  39
  40 Required properties:
  41
  42 - compatible: Must be one of:
  43   * ingenic,jz4740-pwm
  44   * ingenic,jz4725b-pwm
  45 - #pwm-cells: Should be 3. See ../pwm/pwm.txt for a description of the cell
  46   format.
  47 - clocks: List of phandle & clock specifiers for the TCU clocks.
  48 - clock-names: List of name strings for the TCU clocks.
  49
  50
  51 Watchdog node:
  52 --------------
  53
  54 Required properties:
  55
  56 - compatible: Must be "ingenic,jz4740-watchdog"
  57 - clocks: phandle to the WDT clock
  58 - clock-names: should be "wdt"
  59
  60
  61 OS Timer node:
  62 ---------
  63
  64 Required properties:
  65
  66 - compatible: Must be one of:
  67   * ingenic,jz4725b-ost
  68   * ingenic,jz4770-ost
  69 - clocks: phandle to the OST clock
  70 - clock-names: should be "ost"
  71 - interrupts : Specifies the interrupt the OST is connected to.
  72
  73
  74 Example
  75 ==========================================================
  76
  77 #include <dt-bindings/clock/jz4770-cgu.h>
  78 #include <dt-bindings/clock/ingenic,tcu.h>
  79
  80 / {
  81         tcu: timer@10002000 {
  82                 compatible = "ingenic,jz4770-tcu", "simple-mfd";
  83                 reg = <0x10002000 0x1000>;
  84                 #address-cells = <1>;
  85                 #size-cells = <1>;
  86                 ranges = <0x0 0x10002000 0x1000>;
  87
  88                 #clock-cells = <1>;
  89
  90                 clocks = <&cgu JZ4770_CLK_RTC
  91                           &cgu JZ4770_CLK_EXT
  92                           &cgu JZ4770_CLK_PCLK>;
  93                 clock-names = "rtc", "ext", "pclk";
  94
  95                 interrupt-controller;
  96                 #interrupt-cells = <1>;
  97
  98                 interrupt-parent = <&intc>;
  99                 interrupts = <27 26 25>;
 100
 101                 watchdog: watchdog@0 {
 102                         compatible = "ingenic,jz4740-watchdog";
 103                         reg = <0x0 0xc>;
 104
 105                         clocks = <&tcu TCU_CLK_WDT>;
 106                         clock-names = "wdt";
 107                 };
 108
 109                 pwm: pwm@40 {
 110                         compatible = "ingenic,jz4740-pwm";
 111                         reg = <0x40 0x80>;
 112
 113                         #pwm-cells = <3>;
 114
 115                         clocks = <&tcu TCU_CLK_TIMER0
 116                                   &tcu TCU_CLK_TIMER1
 117                                   &tcu TCU_CLK_TIMER2
 118                                   &tcu TCU_CLK_TIMER3
 119                                   &tcu TCU_CLK_TIMER4
 120                                   &tcu TCU_CLK_TIMER5
 121                                   &tcu TCU_CLK_TIMER6
 122                                   &tcu TCU_CLK_TIMER7>;
 123                         clock-names = "timer0", "timer1", "timer2", "timer3",
 124                                       "timer4", "timer5", "timer6", "timer7";
 125                 };
 126
 127                 ost: timer@e0 {
 128                         compatible = "ingenic,jz4770-ost";
 129                         reg = <0xe0 0x20>;
 130
 131                         clocks = <&tcu TCU_CLK_OST>;
 132                         clock-names = "ost";
 133
 134                         interrupts = <15>;
 135                 };
 136         };
 137 };