Documentation/devicetree/bindings/mfd/ac100.txt

   1 X-Powers AC100 Codec/RTC IC Device Tree bindings
   2
   3 AC100 is a audio codec and RTC subsystem combo IC. The 2 parts are
   4 separated, including power supplies and interrupt lines, but share
   5 a common register address space and host interface.
   6
   7 Required properties:
   8 - compatible: "x-powers,ac100"
   9 - reg: The I2C slave address or RSB hardware address for the chip
  10 - sub-nodes:
  11   - codec
  12     - compatible:               "x-powers,ac100-codec"
  13     - interrupt-parent:         The parent interrupt controller
  14     - interrupts:               SoC NMI / GPIO interrupt connected to the
  15                                 IRQ_AUDIO pin
  16     - #clock-cells:             Shall be 0
  17     - clock-output-names:       "4M_adda"
  18
  19     - see clock/clock-bindings.txt for common clock bindings
  20
  21   - rtc
  22     - compatible:               "x-powers,ac100-rtc"
  23     - interrupt-parent:         The parent interrupt controller
  24     - interrupts:               SoC NMI / GPIO interrupt connected to the
  25                                 IRQ_RTC pin
  26     - clocks:                   A phandle to the codec's "4M_adda" clock
  27     - #clock-cells:             Shall be 1
  28     - clock-output-names:       "cko1_rtc", "cko2_rtc", "cko3_rtc"
  29
  30     - see clock/clock-bindings.txt for common clock bindings
  31
  32 Example:
  33
  34 ac100: codec@e89 {
  35         compatible = "x-powers,ac100";
  36         reg = <0xe89>;
  37
  38         ac100_codec: codec {
  39                 compatible = "x-powers,ac100-codec";
  40                 interrupt-parent = <&r_pio>;
  41                 interrupts = <0 9 IRQ_TYPE_LEVEL_LOW>; /* PL9 */
  42                 #clock-cells = <0>;
  43                 clock-output-names = "4M_adda";
  44         };
  45
  46         ac100_rtc: rtc {
  47                 compatible = "x-powers,ac100-rtc";
  48                 interrupt-parent = <&nmi_intc>;
  49                 interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
  50                 clocks = <&ac100_codec>;
  51                 #clock-cells = <1>;
  52                 clock-output-names = "cko1_rtc", "cko2_rtc", "cko3_rtc";
  53         };
  54 };