Documentation/devicetree/bindings/clock/clk-s5pv210-audss.txt

   1 * Samsung Audio Subsystem Clock Controller
   2
   3 The Samsung Audio Subsystem clock controller generates and supplies clocks
   4 to Audio Subsystem block available in the S5PV210 and compatible SoCs.
   5
   6 Required Properties:
   7
   8 - compatible: should be "samsung,s5pv210-audss-clock".
   9 - reg: physical base address and length of the controller's register set.
  10
  11 - #clock-cells: should be 1.
  12
  13 - clocks:
  14   - hclk: AHB bus clock of the Audio Subsystem.
  15   - xxti: Optional fixed rate PLL reference clock, parent of mout_audss. If
  16     not specified (i.e. xusbxti is used for PLL reference), it is fixed to
  17     a clock named "xxti".
  18   - fout_epll: Input PLL to the AudioSS block, parent of mout_audss.
  19   - iiscdclk0: Optional external i2s clock, parent of mout_i2s. If not
  20     specified, it is fixed to a clock named "iiscdclk0".
  21   - sclk_audio0: Audio bus clock, parent of mout_i2s.
  22
  23 - clock-names: Aliases for the above clocks. They should be "hclk",
  24   "xxti", "fout_epll", "iiscdclk0", and "sclk_audio0" respectively.
  25
  26 All available clocks are defined as preprocessor macros in
  27 dt-bindings/clock/s5pv210-audss-clk.h header and can be used in device
  28 tree sources.
  29
  30 Example: Clock controller node.
  31
  32         clk_audss: clock-controller@c0900000 {
  33                 compatible = "samsung,s5pv210-audss-clock";
  34                 reg = <0xc0900000 0x1000>;
  35                 #clock-cells = <1>;
  36                 clock-names = "hclk", "xxti",
  37                                 "fout_epll", "sclk_audio0";
  38                 clocks = <&clocks DOUT_HCLKP>, <&xxti>,
  39                                 <&clocks FOUT_EPLL>, <&clocks SCLK_AUDIO0>;
  40         };
  41
  42 Example: I2S controller node that consumes the clock generated by the clock
  43          controller. Refer to the standard clock bindings for information
  44          about 'clocks' and 'clock-names' property.
  45
  46         i2s0: i2s@03830000 {
  47                 /* ... */
  48                 clock-names = "iis", "i2s_opclk0",
  49                                 "i2s_opclk1";
  50                 clocks = <&clk_audss CLK_I2S>, <&clk_audss CLK_I2S>,
  51                                 <&clk_audss CLK_DOUT_AUD_BUS>;
  52                 /* ... */
  53         };