Documentation/devicetree/bindings/sound/renesas,rsnd.txt

   1 Renesas R-Car sound
   2
   3 =============================================
   4 * Modules
   5 =============================================
   6
   7 Renesas R-Car sound is constructed from below modules
   8 (for Gen2 or later)
   9
  10  SCU            : Sampling Rate Converter Unit
  11   - SRC         : Sampling Rate Converter
  12   - CMD
  13    - CTU        : Channel Transfer Unit
  14    - MIX        : Mixer
  15    - DVC        : Digital Volume and Mute Function
  16  SSIU           : Serial Sound Interface Unit
  17  SSI            : Serial Sound Interface
  18
  19 See detail of each module's channels, connection, limitation on datasheet
  20
  21 =============================================
  22 * Multi channel
  23 =============================================
  24
  25 Multi channel is supported by Multi-SSI, or TDM-SSI.
  26
  27  Multi-SSI      : 6ch case, you can use stereo x 3 SSI
  28  TDM-SSI        : 6ch case, you can use TDM
  29
  30 =============================================
  31 * Enable/Disable each modules
  32 =============================================
  33
  34 See datasheet to check SRC/CTU/MIX/DVC connect-limitation.
  35 DT controls enabling/disabling module.
  36 ${LINUX}/arch/arm/boot/dts/r8a7790-lager.dts can be good example.
  37 This is example of
  38
  39 Playback: [MEM] -> [SRC2] -> [DVC0] -> [SSIU0/SSI0] -> [codec]
  40 Capture:  [MEM] <- [DVC1] <- [SRC3] <- [SSIU1/SSI1] <- [codec]
  41
  42         &rcar_sound {
  43                 ...
  44                 rcar_sound,dai {
  45                         dai0 {
  46                                 playback = <&ssi0 &src2 &dvc0>;
  47                                 capture  = <&ssi1 &src3 &dvc1>;
  48                         };
  49                 };
  50         };
  51
  52 You can use below.
  53 ${LINUX}/arch/arm/boot/dts/r8a7790.dts can be good example.
  54
  55         &src0   &ctu00  &mix0   &dvc0   &ssi0
  56         &src1   &ctu01  &mix1   &dvc1   &ssi1
  57         &src2   &ctu02                  &ssi2
  58         &src3   &ctu03                  &ssi3
  59         &src4                           &ssi4
  60         &src5   &ctu10                  &ssi5
  61         &src6   &ctu11                  &ssi6
  62         &src7   &ctu12                  &ssi7
  63         &src8   &ctu13                  &ssi8
  64         &src9                           &ssi9
  65
  66 =============================================
  67 * SRC (Sampling Rate Converter)
  68 =============================================
  69
  70  [xx]Hz        [yy]Hz
  71  ------> [SRC] ------>
  72
  73 SRC can convert [xx]Hz to [yy]Hz. Then, it has below 2 modes
  74
  75  Asynchronous mode:     input data / output data are based on different clocks.
  76                         you can use this mode on Playback / Capture
  77  Synchronous mode:      input data / output data are based on same clocks.
  78                         This mode will be used if system doesn't have its input clock,
  79                         for example digital TV case.
  80                         you can use this mode on Playback
  81
  82 ------------------
  83 **     Asynchronous mode
  84 ------------------
  85
  86 You need to use "simple-scu-audio-card" sound card for it.
  87 example)
  88
  89         sound {
  90                 compatible = "simple-scu-audio-card";
  91                 ...
  92                 /*
  93                  * SRC Asynchronous mode setting
  94                  * Playback:
  95                  * All input data will be converted to 48kHz
  96                  * Capture:
  97                  * Inputed 48kHz data will be converted to
  98                  * system specified Hz
  99                  */
 100                 simple-audio-card,convert-rate = <48000>;
 101                 ...
 102                 simple-audio-card,cpu {
 103                         sound-dai = <&rcar_sound>;
 104                 };
 105                 simple-audio-card,codec {
 106                         ...
 107                 };
 108         };
 109
 110 ------------------
 111 **     Synchronous mode
 112 ------------------
 113
 114         > amixer set "SRC Out Rate" on
 115         > aplay xxxx.wav
 116         > amixer set "SRC Out Rate" 48000
 117         > amixer set "SRC Out Rate" 44100
 118
 119 =============================================
 120 * CTU (Channel Transfer Unit)
 121 =============================================
 122
 123  [xx]ch        [yy]ch
 124  ------> [CTU] -------->
 125
 126 CTU can convert [xx]ch to [yy]ch, or exchange outputed channel.
 127 CTU conversion needs matrix settings.
 128 For more detail information, see below
 129
 130         Renesas R-Car datasheet
 131          - Sampling Rate Converter Unit (SCU)
 132           - SCU Operation
 133            - CMD Block
 134             - Functional Blocks in CMD
 135
 136         Renesas R-Car datasheet
 137          - Sampling Rate Converter Unit (SCU)
 138           - Register Description
 139            - CTUn Scale Value exx Register (CTUn_SVxxR)
 140
 141         ${LINUX}/sound/soc/sh/rcar/ctu.c
 142          - comment of header
 143
 144 You need to use "simple-scu-audio-card" sound card for it.
 145 example)
 146
 147         sound {
 148                 compatible = "simple-scu-audio-card";
 149                 ...
 150                 /*
 151                  * CTU setting
 152                  * All input data will be converted to 2ch
 153                  * as output data
 154                  */
 155                 simple-audio-card,convert-channels = <2>;
 156                 ...
 157                 simple-audio-card,cpu {
 158                         sound-dai = <&rcar_sound>;
 159                 };
 160                 simple-audio-card,codec {
 161                         ...
 162                 };
 163         };
 164
 165 Ex) Exchange output channel
 166  Input -> Output
 167   1ch  ->  0ch
 168   0ch  ->  1ch
 169
 170   example of using matrix
 171         output 0ch = (input 0ch x 0) + (input 1ch x 1)
 172         output 1ch = (input 0ch x 1) + (input 1ch x 0)
 173
 174         amixer set "CTU Reset" on
 175         amixer set "CTU Pass" 9,10
 176         amixer set "CTU SV0" 0,4194304
 177         amixer set "CTU SV1" 4194304,0
 178
 179  example of changing connection
 180         amixer set "CTU Reset" on
 181         amixer set "CTU Pass" 2,1
 182
 183 =============================================
 184 * MIX (Mixer)
 185 =============================================
 186
 187 MIX merges 2 sounds path. You can see 2 sound interface on system,
 188 and these sounds will be merged by MIX.
 189
 190         aplay -D plughw:0,0 xxxx.wav &
 191         aplay -D plughw:0,1 yyyy.wav
 192
 193 You need to use "simple-scu-audio-card" sound card for it.
 194 Ex)
 195         [MEM] -> [SRC1] -> [CTU02] -+-> [MIX0] -> [DVC0] -> [SSI0]
 196                                     |
 197         [MEM] -> [SRC2] -> [CTU03] -+
 198
 199         sound {
 200                 compatible = "simple-scu-audio-card";
 201                 ...
 202                 simple-audio-card,cpu-0 {
 203                         sound-dai = <&rcar_sound 0>;
 204                 };
 205                 simple-audio-card,cpu-1 {
 206                         sound-dai = <&rcar_sound 1>;
 207                 };
 208                 simple-audio-card,codec {
 209                         ...
 210                 };
 211         };
 212
 213         &rcar_sound {
 214                 ...
 215                 rcar_sound,dai {
 216                         dai0 {
 217                                 playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
 218                         };
 219                         dai1 {
 220                                 playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
 221                         };
 222                 };
 223         };
 224
 225 =============================================
 226 * DVC (Digital Volume and Mute Function)
 227 =============================================
 228
 229 DVC controls Playback/Capture volume.
 230
 231 Playback Volume
 232         amixer set "DVC Out" 100%
 233
 234 Capture Volume
 235         amixer set "DVC In" 100%
 236
 237 Playback Mute
 238         amixer set "DVC Out Mute" on
 239
 240 Capture Mute
 241         amixer set "DVC In Mute" on
 242
 243 Volume Ramp
 244         amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
 245         amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
 246         amixer set "DVC Out Ramp" on
 247         aplay xxx.wav &
 248         amixer set "DVC Out"  80%  // Volume Down
 249         amixer set "DVC Out" 100%  // Volume Up
 250
 251 =============================================
 252 * SSIU (Serial Sound Interface Unit)
 253 =============================================
 254
 255 There is no DT settings for SSIU, because SSIU will be automatically
 256 selected via SSI.
 257 SSIU can avoid some under/over run error, because it has some buffer.
 258 But you can't use it if SSI was PIO mode.
 259 In DMA mode, you can select not to use SSIU by using "no-busif" on DT.
 260
 261         &ssi0 {
 262                 no-busif;
 263         };
 264
 265 =============================================
 266 * SSI (Serial Sound Interface)
 267 =============================================
 268
 269 **  PIO mode
 270
 271 You can use PIO mode which is for connection check by using.
 272 Note: The system will drop non-SSI modules in PIO mode
 273 even though if DT is selecting other modules.
 274
 275         &ssi0 {
 276                 pio-transfer
 277         };
 278
 279 ** DMA mode without SSIU
 280
 281 You can use DMA without SSIU.
 282 Note: under/over run, or noise are likely to occur
 283
 284         &ssi0 {
 285                 no-busif;
 286         };
 287
 288 ** PIN sharing
 289
 290 Each SSI can share WS pin. It is based on platform.
 291 This is example if SSI1 want to share WS pin with SSI0
 292
 293         &ssi1 {
 294                 shared-pin;
 295         };
 296
 297 ** Multi-SSI
 298
 299 You can use Multi-SSI.
 300 This is example of SSI0/SSI1/SSI2 (= for 6ch)
 301
 302         &rcar_sound {
 303                 ...
 304                 rcar_sound,dai {
 305                         dai0 {
 306                                 playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
 307                         };
 308                 };
 309         };
 310
 311 ** TDM-SSI
 312
 313 You can use TDM with SSI.
 314 This is example of TDM 6ch.
 315 Driver can automatically switches TDM <-> stereo mode in this case.
 316
 317         rsnd_tdm: sound {
 318                 compatible = "simple-audio-card";
 319                 ...
 320                 simple-audio-card,cpu {
 321                         /* system can use TDM 6ch */
 322                         dai-tdm-slot-num = <6>;
 323                         sound-dai = <&rcar_sound>;
 324                 };
 325                 simple-audio-card,codec {
 326                         ...
 327                 };
 328         };
 329
 330
 331 =============================================
 332 Required properties:
 333 =============================================
 334
 335 - compatible                    : "renesas,rcar_sound-<soctype>", fallbacks
 336                                   "renesas,rcar_sound-gen1" if generation1, and
 337                                   "renesas,rcar_sound-gen2" if generation2
 338                                   "renesas,rcar_sound-gen3" if generation3
 339                                   Examples with soctypes are:
 340                                     - "renesas,rcar_sound-r8a7778" (R-Car M1A)
 341                                     - "renesas,rcar_sound-r8a7779" (R-Car H1)
 342                                     - "renesas,rcar_sound-r8a7790" (R-Car H2)
 343                                     - "renesas,rcar_sound-r8a7791" (R-Car M2-W)
 344                                     - "renesas,rcar_sound-r8a7793" (R-Car M2-N)
 345                                     - "renesas,rcar_sound-r8a7794" (R-Car E2)
 346                                     - "renesas,rcar_sound-r8a7795" (R-Car H3)
 347 - reg                           : Should contain the register physical address.
 348                                   required register is
 349                                    SRU/ADG/SSI      if generation1
 350                                    SRU/ADG/SSIU/SSI if generation2
 351 - rcar_sound,ssi                : Should contain SSI feature.
 352                                   The number of SSI subnode should be same as HW.
 353                                   see below for detail.
 354 - rcar_sound,src                : Should contain SRC feature.
 355                                   The number of SRC subnode should be same as HW.
 356                                   see below for detail.
 357 - rcar_sound,ctu                : Should contain CTU feature.
 358                                   The number of CTU subnode should be same as HW.
 359                                   see below for detail.
 360 - rcar_sound,mix                : Should contain MIX feature.
 361                                   The number of MIX subnode should be same as HW.
 362                                   see below for detail.
 363 - rcar_sound,dvc                : Should contain DVC feature.
 364                                   The number of DVC subnode should be same as HW.
 365                                   see below for detail.
 366 - rcar_sound,dai                : DAI contents.
 367                                   The number of DAI subnode should be same as HW.
 368                                   see below for detail.
 369 - #sound-dai-cells              : it must be 0 if your system is using single DAI
 370                                   it must be 1 if your system is using multi  DAI
 371 - clocks                        : References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
 372 - clock-names                   : List of necessary clock names.
 373                                   "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
 374                                   "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
 375
 376 Optional properties:
 377 - #clock-cells                  : it must be 0 if your system has audio_clkout
 378                                   it must be 1 if your system has audio_clkout0/1/2/3
 379 - clock-frequency               : for all audio_clkout0/1/2/3
 380 - clkout-lr-asynchronous        : boolean property. it indicates that audio_clkoutn
 381                                   is asynchronizes with lr-clock.
 382 - resets                        : References to SSI resets.
 383 - reset-names                   : List of valid reset names.
 384                                   "ssi-all", "ssi.X"
 385
 386 SSI subnode properties:
 387 - interrupts                    : Should contain SSI interrupt for PIO transfer
 388 - shared-pin                    : if shared clock pin
 389 - pio-transfer                  : use PIO transfer mode
 390 - no-busif                      : BUSIF is not ussed when [mem -> SSI] via DMA case
 391 - dma                           : Should contain Audio DMAC entry
 392 - dma-names                     : SSI  case "rx"  (=playback), "tx"  (=capture)
 393                                   SSIU case "rxu" (=playback), "txu" (=capture)
 394
 395 SRC subnode properties:
 396 - dma                           : Should contain Audio DMAC entry
 397 - dma-names                     : "rx" (=playback), "tx" (=capture)
 398
 399 DVC subnode properties:
 400 - dma                           : Should contain Audio DMAC entry
 401 - dma-names                     : "tx" (=playback/capture)
 402
 403 DAI subnode properties:
 404 - playback                      : list of playback modules
 405 - capture                       : list of capture  modules
 406
 407
 408 =============================================
 409 Example:
 410 =============================================
 411
 412 rcar_sound: sound@ec500000 {
 413         #sound-dai-cells = <1>;
 414         compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
 415         reg =   <0 0xec500000 0 0x1000>, /* SCU */
 416                 <0 0xec5a0000 0 0x100>,  /* ADG */
 417                 <0 0xec540000 0 0x1000>, /* SSIU */
 418                 <0 0xec541000 0 0x1280>, /* SSI */
 419                 <0 0xec740000 0 0x200>;  /* Audio DMAC peri peri*/
 420         reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
 421
 422         clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
 423                 <&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
 424                 <&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
 425                 <&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
 426                 <&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
 427                 <&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
 428                 <&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
 429                 <&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
 430                 <&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
 431                 <&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
 432                 <&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
 433                 <&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
 434                 <&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
 435         clock-names = "ssi-all",
 436                         "ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
 437                         "ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
 438                         "src.9", "src.8", "src.7", "src.6", "src.5",
 439                         "src.4", "src.3", "src.2", "src.1", "src.0",
 440                         "dvc.0", "dvc.1",
 441                         "clk_a", "clk_b", "clk_c", "clk_i";
 442
 443         rcar_sound,dvc {
 444                 dvc0: dvc-0 {
 445                         dmas = <&audma0 0xbc>;
 446                         dma-names = "tx";
 447                 };
 448                 dvc1: dvc-1 {
 449                         dmas = <&audma0 0xbe>;
 450                         dma-names = "tx";
 451                 };
 452         };
 453
 454         rcar_sound,mix {
 455                 mix0: mix-0 { };
 456                 mix1: mix-1 { };
 457         };
 458
 459         rcar_sound,ctu {
 460                 ctu00: ctu-0 { };
 461                 ctu01: ctu-1 { };
 462                 ctu02: ctu-2 { };
 463                 ctu03: ctu-3 { };
 464                 ctu10: ctu-4 { };
 465                 ctu11: ctu-5 { };
 466                 ctu12: ctu-6 { };
 467                 ctu13: ctu-7 { };
 468         };
 469
 470         rcar_sound,src {
 471                 src0: src-0 {
 472                         interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
 473                         dmas = <&audma0 0x85>, <&audma1 0x9a>;
 474                         dma-names = "rx", "tx";
 475                 };
 476                 src1: src-1 {
 477                         interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
 478                         dmas = <&audma0 0x87>, <&audma1 0x9c>;
 479                         dma-names = "rx", "tx";
 480                 };
 481                 src2: src-2 {
 482                         interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
 483                         dmas = <&audma0 0x89>, <&audma1 0x9e>;
 484                         dma-names = "rx", "tx";
 485                 };
 486                 src3: src-3 {
 487                         interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
 488                         dmas = <&audma0 0x8b>, <&audma1 0xa0>;
 489                         dma-names = "rx", "tx";
 490                 };
 491                 src4: src-4 {
 492                         interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>;
 493                         dmas = <&audma0 0x8d>, <&audma1 0xb0>;
 494                         dma-names = "rx", "tx";
 495                 };
 496                 src5: src-5 {
 497                         interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>;
 498                         dmas = <&audma0 0x8f>, <&audma1 0xb2>;
 499                         dma-names = "rx", "tx";
 500                 };
 501                 src6: src-6 {
 502                         interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>;
 503                         dmas = <&audma0 0x91>, <&audma1 0xb4>;
 504                         dma-names = "rx", "tx";
 505                 };
 506                 src7: src-7 {
 507                         interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>;
 508                         dmas = <&audma0 0x93>, <&audma1 0xb6>;
 509                         dma-names = "rx", "tx";
 510                 };
 511                 src8: src-8 {
 512                         interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>;
 513                         dmas = <&audma0 0x95>, <&audma1 0xb8>;
 514                         dma-names = "rx", "tx";
 515                 };
 516                 src9: src-9 {
 517                         interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>;
 518                         dmas = <&audma0 0x97>, <&audma1 0xba>;
 519                         dma-names = "rx", "tx";
 520                 };
 521         };
 522
 523         rcar_sound,ssi {
 524                 ssi0: ssi-0 {
 525                         interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
 526                         dmas = <&audma0 0x01>, <&audma1 0x02>, <&audma0 0x15>, <&audma1 0x16>;
 527                         dma-names = "rx", "tx", "rxu", "txu";
 528                 };
 529                 ssi1: ssi-1 {
 530                         interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
 531                         dmas = <&audma0 0x03>, <&audma1 0x04>, <&audma0 0x49>, <&audma1 0x4a>;
 532                         dma-names = "rx", "tx", "rxu", "txu";
 533                 };
 534                 ssi2: ssi-2 {
 535                         interrupts = <0 372 IRQ_TYPE_LEVEL_HIGH>;
 536                         dmas = <&audma0 0x05>, <&audma1 0x06>, <&audma0 0x63>, <&audma1 0x64>;
 537                         dma-names = "rx", "tx", "rxu", "txu";
 538                 };
 539                 ssi3: ssi-3 {
 540                         interrupts = <0 373 IRQ_TYPE_LEVEL_HIGH>;
 541                         dmas = <&audma0 0x07>, <&audma1 0x08>, <&audma0 0x6f>, <&audma1 0x70>;
 542                         dma-names = "rx", "tx", "rxu", "txu";
 543                 };
 544                 ssi4: ssi-4 {
 545                         interrupts = <0 374 IRQ_TYPE_LEVEL_HIGH>;
 546                         dmas = <&audma0 0x09>, <&audma1 0x0a>, <&audma0 0x71>, <&audma1 0x72>;
 547                         dma-names = "rx", "tx", "rxu", "txu";
 548                 };
 549                 ssi5: ssi-5 {
 550                         interrupts = <0 375 IRQ_TYPE_LEVEL_HIGH>;
 551                         dmas = <&audma0 0x0b>, <&audma1 0x0c>, <&audma0 0x73>, <&audma1 0x74>;
 552                         dma-names = "rx", "tx", "rxu", "txu";
 553                 };
 554                 ssi6: ssi-6 {
 555                         interrupts = <0 376 IRQ_TYPE_LEVEL_HIGH>;
 556                         dmas = <&audma0 0x0d>, <&audma1 0x0e>, <&audma0 0x75>, <&audma1 0x76>;
 557                         dma-names = "rx", "tx", "rxu", "txu";
 558                 };
 559                 ssi7: ssi-7 {
 560                         interrupts = <0 377 IRQ_TYPE_LEVEL_HIGH>;
 561                         dmas = <&audma0 0x0f>, <&audma1 0x10>, <&audma0 0x79>, <&audma1 0x7a>;
 562                         dma-names = "rx", "tx", "rxu", "txu";
 563                 };
 564                 ssi8: ssi-8 {
 565                         interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
 566                         dmas = <&audma0 0x11>, <&audma1 0x12>, <&audma0 0x7b>, <&audma1 0x7c>;
 567                         dma-names = "rx", "tx", "rxu", "txu";
 568                 };
 569                 ssi9: ssi-9 {
 570                         interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
 571                         dmas = <&audma0 0x13>, <&audma1 0x14>, <&audma0 0x7d>, <&audma1 0x7e>;
 572                         dma-names = "rx", "tx", "rxu", "txu";
 573                 };
 574         };
 575
 576         rcar_sound,dai {
 577                 dai0 {
 578                         playback = <&ssi5 &src5>;
 579                         capture  = <&ssi6>;
 580                 };
 581                 dai1 {
 582                         playback = <&ssi3>;
 583                 };
 584                 dai2 {
 585                         capture  = <&ssi4>;
 586                 };
 587                 dai3 {
 588                         playback = <&ssi7>;
 589                 };
 590                 dai4 {
 591                         capture  = <&ssi8>;
 592                 };
 593         };
 594 };
 595
 596 =============================================
 597 Example: simple sound card
 598 =============================================
 599
 600         rsnd_ak4643: sound {
 601                 compatible = "simple-audio-card";
 602
 603                 simple-audio-card,format = "left_j";
 604                 simple-audio-card,bitclock-master = <&sndcodec>;
 605                 simple-audio-card,frame-master = <&sndcodec>;
 606
 607                 sndcpu: simple-audio-card,cpu {
 608                         sound-dai = <&rcar_sound>;
 609                 };
 610
 611                 sndcodec: simple-audio-card,codec {
 612                         sound-dai = <&ak4643>;
 613                         clocks = <&audio_clock>;
 614                 };
 615         };
 616
 617 &rcar_sound {
 618         pinctrl-0 = <&sound_pins &sound_clk_pins>;
 619         pinctrl-names = "default";
 620
 621         /* Single DAI */
 622         #sound-dai-cells = <0>;
 623
 624         status = "okay";
 625
 626         rcar_sound,dai {
 627                 dai0 {
 628                         playback = <&ssi0 &src2 &dvc0>;
 629                         capture  = <&ssi1 &src3 &dvc1>;
 630                 };
 631         };
 632 };
 633
 634 &ssi1 {
 635         shared-pin;
 636 };
 637
 638 =============================================
 639 Example: simple sound card for TDM
 640 =============================================
 641
 642         rsnd_tdm: sound {
 643                 compatible = "simple-audio-card";
 644
 645                 simple-audio-card,format = "left_j";
 646                 simple-audio-card,bitclock-master = <&sndcodec>;
 647                 simple-audio-card,frame-master = <&sndcodec>;
 648
 649                 sndcpu: simple-audio-card,cpu {
 650                         sound-dai = <&rcar_sound>;
 651                         dai-tdm-slot-num = <6>;
 652                 };
 653
 654                 sndcodec: simple-audio-card,codec {
 655                         sound-dai = <&xxx>;
 656                 };
 657         };
 658
 659 =============================================
 660 Example: simple sound card for Multi channel
 661 =============================================
 662
 663 &rcar_sound {
 664         pinctrl-0 = <&sound_pins &sound_clk_pins>;
 665         pinctrl-names = "default";
 666
 667         /* Single DAI */
 668         #sound-dai-cells = <0>;
 669
 670         status = "okay";
 671
 672         rcar_sound,dai {
 673                 dai0 {
 674                         playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
 675                 };
 676         };
 677 };