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     - interrupts:               SoC NMI / GPIO interrupt connected to the
  14                                 IRQ_AUDIO pin
  15     - #clock-cells:             Shall be 0
  16     - clock-output-names:       "4M_adda"
  17
  18     - see clock/clock-bindings.txt for common clock bindings
  19
  20   - rtc
  21     - compatible:               "x-powers,ac100-rtc"
  22     - clocks:                   A phandle to the codec's "4M_adda" clock
  23     - #clock-cells:             Shall be 1
  24     - clock-output-names:       "cko1_rtc", "cko2_rtc", "cko3_rtc"
  25
  26     - see clock/clock-bindings.txt for common clock bindings
  27
  28 Example:
  29
  30 ac100: codec@e89 {
  31         compatible = "x-powers,ac100";
  32         reg = <0xe89>;
  33
  34         ac100_codec: codec {
  35                 compatible = "x-powers,ac100-codec";
  36                 interrupt-parent = <&r_pio>;
  37                 interrupts = <0 9 IRQ_TYPE_LEVEL_LOW>; /* PL9 */
  38                 #clock-cells = <0>;
  39                 clock-output-names = "4M_adda";
  40         };
  41
  42         ac100_rtc: rtc {
  43                 compatible = "x-powers,ac100-rtc";
  44                 interrupt-parent = <&nmi_intc>;
  45                 interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
  46                 clocks = <&ac100_codec>;
  47                 #clock-cells = <1>;
  48                 clock-output-names = "cko1_rtc", "cko2_rtc", "cko3_rtc";
  49         };
  50 };