samsung-i2s.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/sound/samsung-i2s.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Samsung SoC I2S controller
    8 
    9 maintainers:
   10   - Krzysztof Kozlowski <krzk@kernel.org>
   11   - Sylwester Nawrocki <s.nawrocki@samsung.com>
   12 
   13 properties:
   14   compatible:
   15     description: |
   16       samsung,s3c6410-i2s: for 8/16/24bit stereo I2S.
   17 
   18       samsung,s5pv210-i2s: for 8/16/24bit multichannel (5.1) I2S with
   19       secondary FIFO, s/w reset control and internal mux for root clock
   20       source.
   21 
   22       samsung,exynos5420-i2s: for 8/16/24bit multichannel (5.1) I2S for
   23       playback, stereo channel capture, secondary FIFO using internal
   24       or external DMA, s/w reset control, internal mux for root clock
   25       source and 7.1 channel TDM support for playback; TDM (Time division
   26       multiplexing) is to allow transfer of multiple channel audio data on
   27       single data line.
   28 
   29       samsung,exynos7-i2s: with all the available features of Exynos5 I2S.
   30       Exynos7 I2S has 7.1 channel TDM support for capture, secondary FIFO
   31       with only external DMA and more number of root clock sampling
   32       frequencies.
   33 
   34       samsung,exynos7-i2s1: I2S1 on previous samsung platforms supports
   35       stereo channels. Exynos7 I2S1 upgraded to 5.1 multichannel with
   36       slightly modified bit offsets.
   37     enum:
   38       - samsung,s3c6410-i2s
   39       - samsung,s5pv210-i2s
   40       - samsung,exynos5420-i2s
   41       - samsung,exynos7-i2s
   42       - samsung,exynos7-i2s1
   43 
   44   '#address-cells':
   45     const: 1
   46 
   47   '#size-cells':
   48     const: 0
   49 
   50   reg:
   51     maxItems: 1
   52 
   53   dmas:
   54     minItems: 2
   55     maxItems: 3
   56 
   57   dma-names:
   58     oneOf:
   59       - items:
   60           - const: tx
   61           - const: rx
   62       - items:
   63           - const: tx
   64           - const: rx
   65           - const: tx-sec
   66 
   67   assigned-clock-parents: true
   68   assigned-clocks: true
   69 
   70   clocks:
   71     minItems: 1
   72     maxItems: 3
   73 
   74   clock-names:
   75     oneOf:
   76       - items:
   77           - const: iis
   78       - items: # for I2S0
   79           - const: iis
   80           - const: i2s_opclk0
   81           - const: i2s_opclk1
   82       - items: # for I2S1 and I2S2
   83           - const: iis
   84           - const: i2s_opclk0
   85     description: |
   86       "iis" is the I2S bus clock and i2s_opclk0, i2s_opclk1 are sources
   87       of the root clock. I2S0 has internal mux to select the source
   88       of root clock and I2S1 and I2S2 doesn't have any such mux.
   89 
   90   "#clock-cells":
   91     const: 1
   92 
   93   clock-output-names:
   94     deprecated: true
   95     oneOf:
   96       - items: # for I2S0
   97           - const: i2s_cdclk0
   98       - items: # for I2S1
   99           - const: i2s_cdclk1
  100       - items: # for I2S2
  101           - const: i2s_cdclk2
  102     description: Names of the CDCLK I2S output clocks.
  103 
  104   interrupts:
  105     maxItems: 1
  106 
  107   samsung,idma-addr:
  108     $ref: /schemas/types.yaml#/definitions/uint32
  109     description: |
  110       Internal DMA register base address of the audio
  111       subsystem (used in secondary sound source).
  112 
  113   power-domains:
  114     maxItems: 1
  115 
  116   "#sound-dai-cells":
  117     const: 1
  118 
  119 required:
  120   - compatible
  121   - reg
  122   - dmas
  123   - dma-names
  124   - clocks
  125   - clock-names
  126 
  127 additionalProperties: false
  128 
  129 examples:
  130   - |
  131     #include <dt-bindings/clock/exynos-audss-clk.h>
  132 
  133     i2s0: i2s@3830000 {
  134         compatible = "samsung,s5pv210-i2s";
  135         reg = <0x03830000 0x100>;
  136         dmas = <&pdma0 10>,
  137                 <&pdma0 9>,
  138                 <&pdma0 8>;
  139         dma-names = "tx", "rx", "tx-sec";
  140         clocks = <&clock_audss EXYNOS_I2S_BUS>,
  141                 <&clock_audss EXYNOS_I2S_BUS>,
  142                 <&clock_audss EXYNOS_SCLK_I2S>;
  143         clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
  144         #clock-cells = <1>;
  145         samsung,idma-addr = <0x03000000>;
  146         pinctrl-names = "default";
  147         pinctrl-0 = <&i2s0_bus>;
  148         #sound-dai-cells = <1>;
  149     };

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sys/contrib/device-tree/Bindings/sound/samsung-i2s.yaml