sound/soc/sh/rcar/adg.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Helper routines for R-Car sound ADG.
   4 //
   5 //  Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6 #include <linux/clk-provider.h>
   7 #include <linux/clkdev.h>
   8 #include "rsnd.h"
   9
  10 #define CLKA    0
  11 #define CLKB    1
  12 #define CLKC    2
  13 #define CLKI    3
  14 #define CLKMAX  4
  15
  16 #define CLKOUT  0
  17 #define CLKOUT1 1
  18 #define CLKOUT2 2
  19 #define CLKOUT3 3
  20 #define CLKOUTMAX 4
  21
  22 #define BRRx_MASK(x) (0x3FF & x)
  23
  24 static struct rsnd_mod_ops adg_ops = {
  25         .name = "adg",
  26 };
  27
  28 struct rsnd_adg {
  29         struct clk *clk[CLKMAX];
  30         struct clk *clkout[CLKOUTMAX];
  31         struct clk_onecell_data onecell;
  32         struct rsnd_mod mod;
  33         int clk_rate[CLKMAX];
  34         u32 flags;
  35         u32 ckr;
  36         u32 rbga;
  37         u32 rbgb;
  38
  39         int rbga_rate_for_441khz; /* RBGA */
  40         int rbgb_rate_for_48khz;  /* RBGB */
  41 };
  42
  43 #define LRCLK_ASYNC     (1 << 0)
  44 #define AUDIO_OUT_48    (1 << 1)
  45
  46 #define for_each_rsnd_clk(pos, adg, i)          \
  47         for (i = 0;                             \
  48              (i < CLKMAX) &&                    \
  49              ((pos) = adg->clk[i]);             \
  50              i++)
  51 #define for_each_rsnd_clkout(pos, adg, i)       \
  52         for (i = 0;                             \
  53              (i < CLKOUTMAX) &&                 \
  54              ((pos) = adg->clkout[i]);  \
  55              i++)
  56 #define rsnd_priv_to_adg(priv) ((struct rsnd_adg *)(priv)->adg)
  57
  58 static const char * const clk_name[] = {
  59         [CLKA]  = "clk_a",
  60         [CLKB]  = "clk_b",
  61         [CLKC]  = "clk_c",
  62         [CLKI]  = "clk_i",
  63 };
  64
  65 static u32 rsnd_adg_calculate_rbgx(unsigned long div)
  66 {
  67         int i;
  68
  69         if (!div)
  70                 return 0;
  71
  72         for (i = 3; i >= 0; i--) {
  73                 int ratio = 2 << (i * 2);
  74                 if (0 == (div % ratio))
  75                         return (u32)((i << 8) | ((div / ratio) - 1));
  76         }
  77
  78         return ~0;
  79 }
  80
  81 static u32 rsnd_adg_ssi_ws_timing_gen2(struct rsnd_dai_stream *io)
  82 {
  83         struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
  84         int id = rsnd_mod_id(ssi_mod);
  85         int ws = id;
  86
  87         if (rsnd_ssi_is_pin_sharing(io)) {
  88                 switch (id) {
  89                 case 1:
  90                 case 2:
  91                 case 9:
  92                         ws = 0;
  93                         break;
  94                 case 4:
  95                         ws = 3;
  96                         break;
  97                 case 8:
  98                         ws = 7;
  99                         break;
 100                 }
 101         }
 102
 103         return (0x6 + ws) << 8;
 104 }
 105
 106 static void __rsnd_adg_get_timesel_ratio(struct rsnd_priv *priv,
 107                                        struct rsnd_dai_stream *io,
 108                                        unsigned int target_rate,
 109                                        unsigned int *target_val,
 110                                        unsigned int *target_en)
 111 {
 112         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 113         struct device *dev = rsnd_priv_to_dev(priv);
 114         int sel;
 115         unsigned int val, en;
 116         unsigned int min, diff;
 117         unsigned int sel_rate[] = {
 118                 adg->clk_rate[CLKA],    /* 0000: CLKA */
 119                 adg->clk_rate[CLKB],    /* 0001: CLKB */
 120                 adg->clk_rate[CLKC],    /* 0010: CLKC */
 121                 adg->rbga_rate_for_441khz,      /* 0011: RBGA */
 122                 adg->rbgb_rate_for_48khz,       /* 0100: RBGB */
 123         };
 124
 125         min = ~0;
 126         val = 0;
 127         en = 0;
 128         for (sel = 0; sel < ARRAY_SIZE(sel_rate); sel++) {
 129                 int idx = 0;
 130                 int step = 2;
 131                 int div;
 132
 133                 if (!sel_rate[sel])
 134                         continue;
 135
 136                 for (div = 2; div <= 98304; div += step) {
 137                         diff = abs(target_rate - sel_rate[sel] / div);
 138                         if (min > diff) {
 139                                 val = (sel << 8) | idx;
 140                                 min = diff;
 141                                 en = 1 << (sel + 1); /* fixme */
 142                         }
 143
 144                         /*
 145                          * step of 0_0000 / 0_0001 / 0_1101
 146                          * are out of order
 147                          */
 148                         if ((idx > 2) && (idx % 2))
 149                                 step *= 2;
 150                         if (idx == 0x1c) {
 151                                 div += step;
 152                                 step *= 2;
 153                         }
 154                         idx++;
 155                 }
 156         }
 157
 158         if (min == ~0) {
 159                 dev_err(dev, "no Input clock\n");
 160                 return;
 161         }
 162
 163         *target_val = val;
 164         if (target_en)
 165                 *target_en = en;
 166 }
 167
 168 static void rsnd_adg_get_timesel_ratio(struct rsnd_priv *priv,
 169                                        struct rsnd_dai_stream *io,
 170                                        unsigned int in_rate,
 171                                        unsigned int out_rate,
 172                                        u32 *in, u32 *out, u32 *en)
 173 {
 174         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 175         unsigned int target_rate;
 176         u32 *target_val;
 177         u32 _in;
 178         u32 _out;
 179         u32 _en;
 180
 181         /* default = SSI WS */
 182         _in =
 183         _out = rsnd_adg_ssi_ws_timing_gen2(io);
 184
 185         target_rate = 0;
 186         target_val = NULL;
 187         _en = 0;
 188         if (runtime->rate != in_rate) {
 189                 target_rate = out_rate;
 190                 target_val  = &_out;
 191         } else if (runtime->rate != out_rate) {
 192                 target_rate = in_rate;
 193                 target_val  = &_in;
 194         }
 195
 196         if (target_rate)
 197                 __rsnd_adg_get_timesel_ratio(priv, io,
 198                                              target_rate,
 199                                              target_val, &_en);
 200
 201         if (in)
 202                 *in = _in;
 203         if (out)
 204                 *out = _out;
 205         if (en)
 206                 *en = _en;
 207 }
 208
 209 int rsnd_adg_set_cmd_timsel_gen2(struct rsnd_mod *cmd_mod,
 210                                  struct rsnd_dai_stream *io)
 211 {
 212         struct rsnd_priv *priv = rsnd_mod_to_priv(cmd_mod);
 213         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 214         struct rsnd_mod *adg_mod = rsnd_mod_get(adg);
 215         int id = rsnd_mod_id(cmd_mod);
 216         int shift = (id % 2) ? 16 : 0;
 217         u32 mask, val;
 218
 219         rsnd_adg_get_timesel_ratio(priv, io,
 220                                    rsnd_src_get_in_rate(priv, io),
 221                                    rsnd_src_get_out_rate(priv, io),
 222                                    NULL, &val, NULL);
 223
 224         val  = val      << shift;
 225         mask = 0x0f1f   << shift;
 226
 227         rsnd_mod_bset(adg_mod, CMDOUT_TIMSEL, mask, val);
 228
 229         return 0;
 230 }
 231
 232 int rsnd_adg_set_src_timesel_gen2(struct rsnd_mod *src_mod,
 233                                   struct rsnd_dai_stream *io,
 234                                   unsigned int in_rate,
 235                                   unsigned int out_rate)
 236 {
 237         struct rsnd_priv *priv = rsnd_mod_to_priv(src_mod);
 238         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 239         struct rsnd_mod *adg_mod = rsnd_mod_get(adg);
 240         u32 in, out;
 241         u32 mask, en;
 242         int id = rsnd_mod_id(src_mod);
 243         int shift = (id % 2) ? 16 : 0;
 244
 245         rsnd_mod_confirm_src(src_mod);
 246
 247         rsnd_adg_get_timesel_ratio(priv, io,
 248                                    in_rate, out_rate,
 249                                    &in, &out, &en);
 250
 251         in   = in       << shift;
 252         out  = out      << shift;
 253         mask = 0x0f1f   << shift;
 254
 255         rsnd_mod_bset(adg_mod, SRCIN_TIMSEL(id / 2),  mask, in);
 256         rsnd_mod_bset(adg_mod, SRCOUT_TIMSEL(id / 2), mask, out);
 257
 258         if (en)
 259                 rsnd_mod_bset(adg_mod, DIV_EN, en, en);
 260
 261         return 0;
 262 }
 263
 264 static void rsnd_adg_set_ssi_clk(struct rsnd_mod *ssi_mod, u32 val)
 265 {
 266         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 267         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 268         struct rsnd_mod *adg_mod = rsnd_mod_get(adg);
 269         struct device *dev = rsnd_priv_to_dev(priv);
 270         int id = rsnd_mod_id(ssi_mod);
 271         int shift = (id % 4) * 8;
 272         u32 mask = 0xFF << shift;
 273
 274         rsnd_mod_confirm_ssi(ssi_mod);
 275
 276         val = val << shift;
 277
 278         /*
 279          * SSI 8 is not connected to ADG.
 280          * it works with SSI 7
 281          */
 282         if (id == 8)
 283                 return;
 284
 285         rsnd_mod_bset(adg_mod, AUDIO_CLK_SEL(id / 4), mask, val);
 286
 287         dev_dbg(dev, "AUDIO_CLK_SEL is 0x%x\n", val);
 288 }
 289
 290 int rsnd_adg_clk_query(struct rsnd_priv *priv, unsigned int rate)
 291 {
 292         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 293         int i;
 294         int sel_table[] = {
 295                 [CLKA] = 0x1,
 296                 [CLKB] = 0x2,
 297                 [CLKC] = 0x3,
 298                 [CLKI] = 0x0,
 299         };
 300
 301         /*
 302          * find suitable clock from
 303          * AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC/AUDIO_CLKI.
 304          */
 305         for (i = 0; i < CLKMAX; i++)
 306                 if (rate == adg->clk_rate[i])
 307                         return sel_table[i];
 308
 309         /*
 310          * find divided clock from BRGA/BRGB
 311          */
 312         if (rate == adg->rbga_rate_for_441khz)
 313                 return 0x10;
 314
 315         if (rate == adg->rbgb_rate_for_48khz)
 316                 return 0x20;
 317
 318         return -EIO;
 319 }
 320
 321 int rsnd_adg_ssi_clk_stop(struct rsnd_mod *ssi_mod)
 322 {
 323         rsnd_adg_set_ssi_clk(ssi_mod, 0);
 324
 325         return 0;
 326 }
 327
 328 int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *ssi_mod, unsigned int rate)
 329 {
 330         struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
 331         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 332         struct device *dev = rsnd_priv_to_dev(priv);
 333         struct rsnd_mod *adg_mod = rsnd_mod_get(adg);
 334         int data;
 335         u32 ckr = 0;
 336
 337         data = rsnd_adg_clk_query(priv, rate);
 338         if (data < 0)
 339                 return data;
 340
 341         rsnd_adg_set_ssi_clk(ssi_mod, data);
 342
 343         if (rsnd_flags_has(adg, LRCLK_ASYNC)) {
 344                 if (rsnd_flags_has(adg, AUDIO_OUT_48))
 345                         ckr = 0x80000000;
 346         } else {
 347                 if (0 == (rate % 8000))
 348                         ckr = 0x80000000;
 349         }
 350
 351         rsnd_mod_bset(adg_mod, BRGCKR, 0x80770000, adg->ckr | ckr);
 352         rsnd_mod_write(adg_mod, BRRA,  adg->rbga);
 353         rsnd_mod_write(adg_mod, BRRB,  adg->rbgb);
 354
 355         dev_dbg(dev, "CLKOUT is based on BRG%c (= %dHz)\n",
 356                 (ckr) ? 'B' : 'A',
 357                 (ckr) ? adg->rbgb_rate_for_48khz :
 358                         adg->rbga_rate_for_441khz);
 359
 360         return 0;
 361 }
 362
 363 void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable)
 364 {
 365         struct rsnd_adg *adg = rsnd_priv_to_adg(priv);
 366         struct device *dev = rsnd_priv_to_dev(priv);
 367         struct clk *clk;
 368         int i;
 369
 370         for_each_rsnd_clk(clk, adg, i) {
 371                 if (enable) {
 372                         int ret = clk_prepare_enable(clk);
 373
 374                         /*
 375                          * We shouldn't use clk_get_rate() under
 376                          * atomic context. Let's keep it when
 377                          * rsnd_adg_clk_enable() was called
 378                          */
 379                         adg->clk_rate[i] = 0;
 380                         if (ret < 0)
 381                                 dev_warn(dev, "can't use clk %d\n", i);
 382                         else
 383                                 adg->clk_rate[i] = clk_get_rate(clk);
 384                 } else {
 385                         if (adg->clk_rate[i])
 386                                 clk_disable_unprepare(clk);
 387                         adg->clk_rate[i] = 0;
 388                 }
 389         }
 390 }
 391
 392 #define NULL_CLK "rsnd_adg_null"
 393 static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv)
 394 {
 395         struct device *dev = rsnd_priv_to_dev(priv);
 396
 397         if (!priv->null_hw) {
 398                 struct clk_hw *_hw;
 399                 int ret;
 400
 401                 _hw = clk_hw_register_fixed_rate_with_accuracy(dev, NULL_CLK, NULL, 0, 0, 0);
 402                 if (IS_ERR(_hw))
 403                         return NULL;
 404
 405                 ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, _hw);
 406                 if (ret < 0)
 407                         clk_hw_unregister_fixed_rate(_hw);
 408
 409                 priv->null_hw = _hw;
 410         }
 411
 412         return clk_hw_get_clk(priv->null_hw, NULL_CLK);
 413 }
 414
 415 static void rsnd_adg_get_clkin(struct rsnd_priv *priv,
 416                                struct rsnd_adg *adg)
 417 {
 418         struct device *dev = rsnd_priv_to_dev(priv);
 419         int i;
 420
 421         for (i = 0; i < CLKMAX; i++) {
 422                 struct clk *clk = devm_clk_get(dev, clk_name[i]);
 423
 424                 if (IS_ERR(clk))
 425                         clk = rsnd_adg_null_clk_get(priv);
 426                 if (IS_ERR(clk))
 427                         dev_err(dev, "no adg clock (%s)\n", clk_name[i]);
 428
 429                 adg->clk[i] = clk;
 430         }
 431 }
 432
 433 static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 434                                 struct rsnd_adg *adg)
 435 {
 436         struct clk *clk;
 437         struct device *dev = rsnd_priv_to_dev(priv);
 438         struct device_node *np = dev->of_node;
 439         struct property *prop;
 440         u32 ckr, rbgx, rbga, rbgb;
 441         u32 rate, div;
 442 #define REQ_SIZE 2
 443         u32 req_rate[REQ_SIZE] = {};
 444         uint32_t count = 0;
 445         unsigned long req_48kHz_rate, req_441kHz_rate;
 446         int i, req_size;
 447         const char *parent_clk_name = NULL;
 448         static const char * const clkout_name[] = {
 449                 [CLKOUT]  = "audio_clkout",
 450                 [CLKOUT1] = "audio_clkout1",
 451                 [CLKOUT2] = "audio_clkout2",
 452                 [CLKOUT3] = "audio_clkout3",
 453         };
 454         int brg_table[] = {
 455                 [CLKA] = 0x0,
 456                 [CLKB] = 0x1,
 457                 [CLKC] = 0x4,
 458                 [CLKI] = 0x2,
 459         };
 460
 461         ckr = 0;
 462         rbga = 2; /* default 1/6 */
 463         rbgb = 2; /* default 1/6 */
 464
 465         /*
 466          * ADG supports BRRA/BRRB output only
 467          * this means all clkout0/1/2/3 will be same rate
 468          */
 469         prop = of_find_property(np, "clock-frequency", NULL);
 470         if (!prop)
 471                 goto rsnd_adg_get_clkout_end;
 472
 473         req_size = prop->length / sizeof(u32);
 474         if (req_size > REQ_SIZE) {
 475                 dev_err(dev,
 476                         "too many clock-frequency, use top %d\n", REQ_SIZE);
 477                 req_size = REQ_SIZE;
 478         }
 479
 480         of_property_read_u32_array(np, "clock-frequency", req_rate, req_size);
 481         req_48kHz_rate = 0;
 482         req_441kHz_rate = 0;
 483         for (i = 0; i < req_size; i++) {
 484                 if (0 == (req_rate[i] % 44100))
 485                         req_441kHz_rate = req_rate[i];
 486                 if (0 == (req_rate[i] % 48000))
 487                         req_48kHz_rate = req_rate[i];
 488         }
 489
 490         if (req_rate[0] % 48000 == 0)
 491                 rsnd_flags_set(adg, AUDIO_OUT_48);
 492
 493         if (of_get_property(np, "clkout-lr-asynchronous", NULL))
 494                 rsnd_flags_set(adg, LRCLK_ASYNC);
 495
 496         /*
 497          * This driver is assuming that AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC
 498          * have 44.1kHz or 48kHz base clocks for now.
 499          *
 500          * SSI itself can divide parent clock by 1/1 - 1/16
 501          * see
 502          *      rsnd_adg_ssi_clk_try_start()
 503          *      rsnd_ssi_master_clk_start()
 504          */
 505         adg->rbga_rate_for_441khz       = 0;
 506         adg->rbgb_rate_for_48khz        = 0;
 507         for_each_rsnd_clk(clk, adg, i) {
 508                 rate = clk_get_rate(clk);
 509
 510                 if (0 == rate) /* not used */
 511                         continue;
 512
 513                 /* RBGA */
 514                 if (!adg->rbga_rate_for_441khz && (0 == rate % 44100)) {
 515                         div = 6;
 516                         if (req_441kHz_rate)
 517                                 div = rate / req_441kHz_rate;
 518                         rbgx = rsnd_adg_calculate_rbgx(div);
 519                         if (BRRx_MASK(rbgx) == rbgx) {
 520                                 rbga = rbgx;
 521                                 adg->rbga_rate_for_441khz = rate / div;
 522                                 ckr |= brg_table[i] << 20;
 523                                 if (req_441kHz_rate &&
 524                                     !rsnd_flags_has(adg, AUDIO_OUT_48))
 525                                         parent_clk_name = __clk_get_name(clk);
 526                         }
 527                 }
 528
 529                 /* RBGB */
 530                 if (!adg->rbgb_rate_for_48khz && (0 == rate % 48000)) {
 531                         div = 6;
 532                         if (req_48kHz_rate)
 533                                 div = rate / req_48kHz_rate;
 534                         rbgx = rsnd_adg_calculate_rbgx(div);
 535                         if (BRRx_MASK(rbgx) == rbgx) {
 536                                 rbgb = rbgx;
 537                                 adg->rbgb_rate_for_48khz = rate / div;
 538                                 ckr |= brg_table[i] << 16;
 539                                 if (req_48kHz_rate &&
 540                                     rsnd_flags_has(adg, AUDIO_OUT_48))
 541                                         parent_clk_name = __clk_get_name(clk);
 542                         }
 543                 }
 544         }
 545
 546         /*
 547          * ADG supports BRRA/BRRB output only.
 548          * this means all clkout0/1/2/3 will be * same rate
 549          */
 550
 551         of_property_read_u32(np, "#clock-cells", &count);
 552         /*
 553          * for clkout
 554          */
 555         if (!count) {
 556                 clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT],
 557                                               parent_clk_name, 0, req_rate[0]);
 558                 if (!IS_ERR(clk)) {
 559                         adg->clkout[CLKOUT] = clk;
 560                         of_clk_add_provider(np, of_clk_src_simple_get, clk);
 561                 }
 562         }
 563         /*
 564          * for clkout0/1/2/3
 565          */
 566         else {
 567                 for (i = 0; i < CLKOUTMAX; i++) {
 568                         clk = clk_register_fixed_rate(dev, clkout_name[i],
 569                                                       parent_clk_name, 0,
 570                                                       req_rate[0]);
 571                         if (!IS_ERR(clk))
 572                                 adg->clkout[i] = clk;
 573                 }
 574                 adg->onecell.clks       = adg->clkout;
 575                 adg->onecell.clk_num    = CLKOUTMAX;
 576                 of_clk_add_provider(np, of_clk_src_onecell_get,
 577                                     &adg->onecell);
 578         }
 579
 580 rsnd_adg_get_clkout_end:
 581         adg->ckr = ckr;
 582         adg->rbga = rbga;
 583         adg->rbgb = rbgb;
 584 }
 585
 586 #ifdef DEBUG
 587 static void rsnd_adg_clk_dbg_info(struct rsnd_priv *priv, struct rsnd_adg *adg)
 588 {
 589         struct device *dev = rsnd_priv_to_dev(priv);
 590         struct clk *clk;
 591         int i;
 592
 593         for_each_rsnd_clk(clk, adg, i)
 594                 dev_dbg(dev, "%s    : %pa : %ld\n",
 595                         clk_name[i], clk, clk_get_rate(clk));
 596
 597         dev_dbg(dev, "BRGCKR = 0x%08x, BRRA/BRRB = 0x%x/0x%x\n",
 598                 adg->ckr, adg->rbga, adg->rbgb);
 599         dev_dbg(dev, "BRGA (for 44100 base) = %d\n", adg->rbga_rate_for_441khz);
 600         dev_dbg(dev, "BRGB (for 48000 base) = %d\n", adg->rbgb_rate_for_48khz);
 601
 602         /*
 603          * Actual CLKOUT will be exchanged in rsnd_adg_ssi_clk_try_start()
 604          * by BRGCKR::BRGCKR_31
 605          */
 606         for_each_rsnd_clkout(clk, adg, i)
 607                 dev_dbg(dev, "clkout %d : %pa : %ld\n", i,
 608                         clk, clk_get_rate(clk));
 609 }
 610 #else
 611 #define rsnd_adg_clk_dbg_info(priv, adg)
 612 #endif
 613
 614 int rsnd_adg_probe(struct rsnd_priv *priv)
 615 {
 616         struct rsnd_adg *adg;
 617         struct device *dev = rsnd_priv_to_dev(priv);
 618         int ret;
 619
 620         adg = devm_kzalloc(dev, sizeof(*adg), GFP_KERNEL);
 621         if (!adg)
 622                 return -ENOMEM;
 623
 624         ret = rsnd_mod_init(priv, &adg->mod, &adg_ops,
 625                       NULL, 0, 0);
 626         if (ret)
 627                 return ret;
 628
 629         rsnd_adg_get_clkin(priv, adg);
 630         rsnd_adg_get_clkout(priv, adg);
 631         rsnd_adg_clk_dbg_info(priv, adg);
 632
 633         priv->adg = adg;
 634
 635         rsnd_adg_clk_enable(priv);
 636
 637         return 0;
 638 }
 639
 640 void rsnd_adg_remove(struct rsnd_priv *priv)
 641 {
 642         struct device *dev = rsnd_priv_to_dev(priv);
 643         struct device_node *np = dev->of_node;
 644         struct rsnd_adg *adg = priv->adg;
 645         struct clk *clk;
 646         int i;
 647
 648         for_each_rsnd_clkout(clk, adg, i)
 649                 if (adg->clkout[i])
 650                         clk_unregister_fixed_rate(adg->clkout[i]);
 651         if (priv->null_hw)
 652                 clk_hw_unregister_fixed_rate(priv->null_hw);
 653
 654         of_clk_del_provider(np);
 655
 656         rsnd_adg_clk_disable(priv);
 657 }