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 CLKINMAX 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 #define ADG_HZ_441 0 29 #define ADG_HZ_48 1 30 #define ADG_HZ_SIZE 2 31 32 struct rsnd_adg { 33 struct clk *clkin[CLKINMAX]; 34 struct clk *clkout[CLKOUTMAX]; 35 struct clk *null_clk; 36 struct clk_onecell_data onecell; 37 struct rsnd_mod mod; 38 int clkin_rate[CLKINMAX]; 39 int clkin_size; 40 int clkout_size; 41 u32 ckr; 42 u32 brga; 43 u32 brgb; 44 45 int brg_rate[ADG_HZ_SIZE]; /* BRGA / BRGB */ 46 }; 47 48 #define for_each_rsnd_clkin(pos, adg, i) \ 49 for (i = 0; \ 50 (i < adg->clkin_size) && \ 51 ((pos) = adg->clkin[i]); \ 52 i++) 53 #define for_each_rsnd_clkout(pos, adg, i) \ 54 for (i = 0; \ 55 (i < adg->clkout_size) && \ 56 ((pos) = adg->clkout[i]); \ 57 i++) 58 #define rsnd_priv_to_adg(priv) ((struct rsnd_adg *)(priv)->adg) 59 60 static const char * const clkin_name_gen4[] = { 61 [CLKA] = "clkin", 62 }; 63 64 static const char * const clkin_name_gen2[] = { 65 [CLKA] = "clk_a", 66 [CLKB] = "clk_b", 67 [CLKC] = "clk_c", 68 [CLKI] = "clk_i", 69 }; 70 71 static const char * const clkout_name_gen2[] = { 72 [CLKOUT] = "audio_clkout", 73 [CLKOUT1] = "audio_clkout1", 74 [CLKOUT2] = "audio_clkout2", 75 [CLKOUT3] = "audio_clkout3", 76 }; 77 78 static u32 rsnd_adg_calculate_brgx(unsigned long div) 79 { 80 int i; 81 82 if (!div) 83 return 0; 84 85 for (i = 3; i >= 0; i--) { 86 int ratio = 2 << (i * 2); 87 if (0 == (div % ratio)) 88 return (u32)((i << 8) | ((div / ratio) - 1)); 89 } 90 91 return ~0; 92 } 93 94 static u32 rsnd_adg_ssi_ws_timing_gen2(struct rsnd_dai_stream *io) 95 { 96 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); 97 int id = rsnd_mod_id(ssi_mod); 98 int ws = id; 99 100 if (rsnd_ssi_is_pin_sharing(io)) { 101 switch (id) { 102 case 1: 103 case 2: 104 case 9: 105 ws = 0; 106 break; 107 case 4: 108 ws = 3; 109 break; 110 case 8: 111 ws = 7; 112 break; 113 } 114 } 115 116 return (0x6 + ws) << 8; 117 } 118 119 static void __rsnd_adg_get_timesel_ratio(struct rsnd_priv *priv, 120 struct rsnd_dai_stream *io, 121 unsigned int target_rate, 122 unsigned int *target_val, 123 unsigned int *target_en) 124 { 125 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 126 struct device *dev = rsnd_priv_to_dev(priv); 127 int sel; 128 unsigned int val, en; 129 unsigned int min, diff; 130 unsigned int sel_rate[] = { 131 adg->clkin_rate[CLKA], /* 0000: CLKA */ 132 adg->clkin_rate[CLKB], /* 0001: CLKB */ 133 adg->clkin_rate[CLKC], /* 0010: CLKC */ 134 adg->brg_rate[ADG_HZ_441], /* 0011: BRGA */ 135 adg->brg_rate[ADG_HZ_48], /* 0100: BRGB */ 136 }; 137 138 min = ~0; 139 val = 0; 140 en = 0; 141 for (sel = 0; sel < ARRAY_SIZE(sel_rate); sel++) { 142 int idx = 0; 143 int step = 2; 144 int div; 145 146 if (!sel_rate[sel]) 147 continue; 148 149 for (div = 2; div <= 98304; div += step) { 150 diff = abs(target_rate - sel_rate[sel] / div); 151 if (min > diff) { 152 val = (sel << 8) | idx; 153 min = diff; 154 en = 1 << (sel + 1); /* fixme */ 155 } 156 157 /* 158 * step of 0_0000 / 0_0001 / 0_1101 159 * are out of order 160 */ 161 if ((idx > 2) && (idx % 2)) 162 step *= 2; 163 if (idx == 0x1c) { 164 div += step; 165 step *= 2; 166 } 167 idx++; 168 } 169 } 170 171 if (min == ~0) { 172 dev_err(dev, "no Input clock\n"); 173 return; 174 } 175 176 *target_val = val; 177 if (target_en) 178 *target_en = en; 179 } 180 181 static void rsnd_adg_get_timesel_ratio(struct rsnd_priv *priv, 182 struct rsnd_dai_stream *io, 183 unsigned int in_rate, 184 unsigned int out_rate, 185 u32 *in, u32 *out, u32 *en) 186 { 187 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 188 unsigned int target_rate; 189 u32 *target_val; 190 u32 _in; 191 u32 _out; 192 u32 _en; 193 194 /* default = SSI WS */ 195 _in = 196 _out = rsnd_adg_ssi_ws_timing_gen2(io); 197 198 target_rate = 0; 199 target_val = NULL; 200 _en = 0; 201 if (runtime->rate != in_rate) { 202 target_rate = out_rate; 203 target_val = &_out; 204 } else if (runtime->rate != out_rate) { 205 target_rate = in_rate; 206 target_val = &_in; 207 } 208 209 if (target_rate) 210 __rsnd_adg_get_timesel_ratio(priv, io, 211 target_rate, 212 target_val, &_en); 213 214 if (in) 215 *in = _in; 216 if (out) 217 *out = _out; 218 if (en) 219 *en = _en; 220 } 221 222 int rsnd_adg_set_cmd_timsel_gen2(struct rsnd_mod *cmd_mod, 223 struct rsnd_dai_stream *io) 224 { 225 struct rsnd_priv *priv = rsnd_mod_to_priv(cmd_mod); 226 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 227 struct rsnd_mod *adg_mod = rsnd_mod_get(adg); 228 int id = rsnd_mod_id(cmd_mod); 229 int shift = (id % 2) ? 16 : 0; 230 u32 mask, val; 231 232 rsnd_adg_get_timesel_ratio(priv, io, 233 rsnd_src_get_in_rate(priv, io), 234 rsnd_src_get_out_rate(priv, io), 235 NULL, &val, NULL); 236 237 val = val << shift; 238 mask = 0x0f1f << shift; 239 240 rsnd_mod_bset(adg_mod, CMDOUT_TIMSEL, mask, val); 241 242 return 0; 243 } 244 245 int rsnd_adg_set_src_timesel_gen2(struct rsnd_mod *src_mod, 246 struct rsnd_dai_stream *io, 247 unsigned int in_rate, 248 unsigned int out_rate) 249 { 250 struct rsnd_priv *priv = rsnd_mod_to_priv(src_mod); 251 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 252 struct rsnd_mod *adg_mod = rsnd_mod_get(adg); 253 u32 in, out; 254 u32 mask, en; 255 int id = rsnd_mod_id(src_mod); 256 int shift = (id % 2) ? 16 : 0; 257 258 rsnd_mod_confirm_src(src_mod); 259 260 rsnd_adg_get_timesel_ratio(priv, io, 261 in_rate, out_rate, 262 &in, &out, &en); 263 264 in = in << shift; 265 out = out << shift; 266 mask = 0x0f1f << shift; 267 268 rsnd_mod_bset(adg_mod, SRCIN_TIMSEL(id / 2), mask, in); 269 rsnd_mod_bset(adg_mod, SRCOUT_TIMSEL(id / 2), mask, out); 270 271 if (en) 272 rsnd_mod_bset(adg_mod, DIV_EN, en, en); 273 274 return 0; 275 } 276 277 static void rsnd_adg_set_ssi_clk(struct rsnd_mod *ssi_mod, u32 val) 278 { 279 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); 280 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 281 struct rsnd_mod *adg_mod = rsnd_mod_get(adg); 282 struct device *dev = rsnd_priv_to_dev(priv); 283 int id = rsnd_mod_id(ssi_mod); 284 int shift = (id % 4) * 8; 285 u32 mask = 0xFF << shift; 286 287 rsnd_mod_confirm_ssi(ssi_mod); 288 289 val = val << shift; 290 291 /* 292 * SSI 8 is not connected to ADG. 293 * it works with SSI 7 294 */ 295 if (id == 8) 296 return; 297 298 rsnd_mod_bset(adg_mod, AUDIO_CLK_SEL(id / 4), mask, val); 299 300 dev_dbg(dev, "AUDIO_CLK_SEL is 0x%x\n", val); 301 } 302 303 int rsnd_adg_clk_query(struct rsnd_priv *priv, unsigned int rate) 304 { 305 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 306 struct clk *clk; 307 int i; 308 int sel_table[] = { 309 [CLKA] = 0x1, 310 [CLKB] = 0x2, 311 [CLKC] = 0x3, 312 [CLKI] = 0x0, 313 }; 314 315 /* 316 * find suitable clock from 317 * AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC/AUDIO_CLKI. 318 */ 319 for_each_rsnd_clkin(clk, adg, i) 320 if (rate == adg->clkin_rate[i]) 321 return sel_table[i]; 322 323 /* 324 * find divided clock from BRGA/BRGB 325 */ 326 if (rate == adg->brg_rate[ADG_HZ_441]) 327 return 0x10; 328 329 if (rate == adg->brg_rate[ADG_HZ_48]) 330 return 0x20; 331 332 return -EIO; 333 } 334 335 int rsnd_adg_ssi_clk_stop(struct rsnd_mod *ssi_mod) 336 { 337 rsnd_adg_set_ssi_clk(ssi_mod, 0); 338 339 return 0; 340 } 341 342 int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *ssi_mod, unsigned int rate) 343 { 344 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); 345 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 346 struct device *dev = rsnd_priv_to_dev(priv); 347 struct rsnd_mod *adg_mod = rsnd_mod_get(adg); 348 int data; 349 u32 ckr = 0; 350 351 data = rsnd_adg_clk_query(priv, rate); 352 if (data < 0) 353 return data; 354 355 rsnd_adg_set_ssi_clk(ssi_mod, data); 356 357 if (0 == (rate % 8000)) 358 ckr = 0x80000000; /* BRGB output = 48kHz */ 359 360 rsnd_mod_bset(adg_mod, BRGCKR, 0x80770000, adg->ckr | ckr); 361 362 dev_dbg(dev, "CLKOUT is based on BRG%c (= %dHz)\n", 363 (ckr) ? 'B' : 'A', 364 (ckr) ? adg->brg_rate[ADG_HZ_48] : 365 adg->brg_rate[ADG_HZ_441]); 366 367 return 0; 368 } 369 370 void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable) 371 { 372 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 373 struct rsnd_mod *adg_mod = rsnd_mod_get(adg); 374 struct clk *clk; 375 int i; 376 377 if (enable) { 378 rsnd_mod_bset(adg_mod, BRGCKR, 0x80770000, adg->ckr); 379 rsnd_mod_write(adg_mod, BRRA, adg->brga); 380 rsnd_mod_write(adg_mod, BRRB, adg->brgb); 381 } 382 383 for_each_rsnd_clkin(clk, adg, i) { 384 if (enable) { 385 clk_prepare_enable(clk); 386 387 /* 388 * We shouldn't use clk_get_rate() under 389 * atomic context. Let's keep it when 390 * rsnd_adg_clk_enable() was called 391 */ 392 adg->clkin_rate[i] = clk_get_rate(clk); 393 } else { 394 clk_disable_unprepare(clk); 395 } 396 } 397 } 398 399 static struct clk *rsnd_adg_create_null_clk(struct rsnd_priv *priv, 400 const char * const name, 401 const char *parent) 402 { 403 struct device *dev = rsnd_priv_to_dev(priv); 404 struct clk *clk; 405 406 clk = clk_register_fixed_rate(dev, name, parent, 0, 0); 407 if (IS_ERR_OR_NULL(clk)) { 408 dev_err(dev, "create null clk error\n"); 409 return ERR_CAST(clk); 410 } 411 412 return clk; 413 } 414 415 static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) 416 { 417 struct rsnd_adg *adg = priv->adg; 418 419 if (!adg->null_clk) { 420 static const char * const name = "rsnd_adg_null"; 421 422 adg->null_clk = rsnd_adg_create_null_clk(priv, name, NULL); 423 } 424 425 return adg->null_clk; 426 } 427 428 static void rsnd_adg_null_clk_clean(struct rsnd_priv *priv) 429 { 430 struct rsnd_adg *adg = priv->adg; 431 432 if (adg->null_clk) 433 clk_unregister_fixed_rate(adg->null_clk); 434 } 435 436 static int rsnd_adg_get_clkin(struct rsnd_priv *priv) 437 { 438 struct rsnd_adg *adg = priv->adg; 439 struct device *dev = rsnd_priv_to_dev(priv); 440 struct clk *clk; 441 const char * const *clkin_name; 442 int clkin_size; 443 int i; 444 445 clkin_name = clkin_name_gen2; 446 clkin_size = ARRAY_SIZE(clkin_name_gen2); 447 if (rsnd_is_gen4(priv)) { 448 clkin_name = clkin_name_gen4; 449 clkin_size = ARRAY_SIZE(clkin_name_gen4); 450 } 451 452 for (i = 0; i < clkin_size; i++) { 453 clk = devm_clk_get(dev, clkin_name[i]); 454 455 if (IS_ERR_OR_NULL(clk)) 456 clk = rsnd_adg_null_clk_get(priv); 457 if (IS_ERR_OR_NULL(clk)) 458 goto err; 459 460 adg->clkin[i] = clk; 461 } 462 463 adg->clkin_size = clkin_size; 464 465 return 0; 466 467 err: 468 dev_err(dev, "adg clock IN get failed\n"); 469 470 rsnd_adg_null_clk_clean(priv); 471 472 return -EIO; 473 } 474 475 static void rsnd_adg_unregister_clkout(struct rsnd_priv *priv) 476 { 477 struct rsnd_adg *adg = priv->adg; 478 struct clk *clk; 479 int i; 480 481 for_each_rsnd_clkout(clk, adg, i) 482 clk_unregister_fixed_rate(clk); 483 } 484 485 static int rsnd_adg_get_clkout(struct rsnd_priv *priv) 486 { 487 struct rsnd_adg *adg = priv->adg; 488 struct clk *clk; 489 struct device *dev = rsnd_priv_to_dev(priv); 490 struct device_node *np = dev->of_node; 491 struct property *prop; 492 u32 ckr, brgx, brga, brgb; 493 u32 req_rate[ADG_HZ_SIZE] = {}; 494 uint32_t count = 0; 495 unsigned long req_Hz[ADG_HZ_SIZE]; 496 int clkout_size; 497 int i, req_size; 498 int approximate = 0; 499 const char *parent_clk_name = NULL; 500 const char * const *clkout_name; 501 int brg_table[] = { 502 [CLKA] = 0x0, 503 [CLKB] = 0x1, 504 [CLKC] = 0x4, 505 [CLKI] = 0x2, 506 }; 507 508 ckr = 0; 509 brga = 0xff; /* default */ 510 brgb = 0xff; /* default */ 511 512 /* 513 * ADG supports BRRA/BRRB output only 514 * this means all clkout0/1/2/3 will be same rate 515 */ 516 prop = of_find_property(np, "clock-frequency", NULL); 517 if (!prop) 518 goto rsnd_adg_get_clkout_end; 519 520 req_size = prop->length / sizeof(u32); 521 if (req_size > ADG_HZ_SIZE) { 522 dev_err(dev, "too many clock-frequency\n"); 523 return -EINVAL; 524 } 525 526 of_property_read_u32_array(np, "clock-frequency", req_rate, req_size); 527 req_Hz[ADG_HZ_48] = 0; 528 req_Hz[ADG_HZ_441] = 0; 529 for (i = 0; i < req_size; i++) { 530 if (0 == (req_rate[i] % 44100)) 531 req_Hz[ADG_HZ_441] = req_rate[i]; 532 if (0 == (req_rate[i] % 48000)) 533 req_Hz[ADG_HZ_48] = req_rate[i]; 534 } 535 536 /* 537 * This driver is assuming that AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC 538 * have 44.1kHz or 48kHz base clocks for now. 539 * 540 * SSI itself can divide parent clock by 1/1 - 1/16 541 * see 542 * rsnd_adg_ssi_clk_try_start() 543 * rsnd_ssi_master_clk_start() 544 */ 545 546 /* 547 * [APPROXIMATE] 548 * 549 * clk_i (internal clock) can't create accurate rate, it will be approximate rate. 550 * 551 * <Note> 552 * 553 * clk_i needs x2 of required maximum rate. 554 * see 555 * - Minimum division of BRRA/BRRB 556 * - rsnd_ssi_clk_query() 557 * 558 * Sample Settings for TDM 8ch, 32bit width 559 * 560 * 8(ch) x 32(bit) x 44100(Hz) x 2<Note> = 22579200 561 * 8(ch) x 32(bit) x 48000(Hz) x 2<Note> = 24576000 562 * 563 * clock-frequency = <22579200 24576000>; 564 */ 565 for_each_rsnd_clkin(clk, adg, i) { 566 u32 rate, div; 567 568 rate = clk_get_rate(clk); 569 570 if (0 == rate) /* not used */ 571 continue; 572 573 /* BRGA */ 574 575 if (i == CLKI) 576 /* see [APPROXIMATE] */ 577 rate = (clk_get_rate(clk) / req_Hz[ADG_HZ_441]) * req_Hz[ADG_HZ_441]; 578 if (!adg->brg_rate[ADG_HZ_441] && req_Hz[ADG_HZ_441] && (0 == rate % 44100)) { 579 div = rate / req_Hz[ADG_HZ_441]; 580 brgx = rsnd_adg_calculate_brgx(div); 581 if (BRRx_MASK(brgx) == brgx) { 582 brga = brgx; 583 adg->brg_rate[ADG_HZ_441] = rate / div; 584 ckr |= brg_table[i] << 20; 585 if (req_Hz[ADG_HZ_441]) 586 parent_clk_name = __clk_get_name(clk); 587 if (i == CLKI) 588 approximate = 1; 589 } 590 } 591 592 /* BRGB */ 593 594 if (i == CLKI) 595 /* see [APPROXIMATE] */ 596 rate = (clk_get_rate(clk) / req_Hz[ADG_HZ_48]) * req_Hz[ADG_HZ_48]; 597 if (!adg->brg_rate[ADG_HZ_48] && req_Hz[ADG_HZ_48] && (0 == rate % 48000)) { 598 div = rate / req_Hz[ADG_HZ_48]; 599 brgx = rsnd_adg_calculate_brgx(div); 600 if (BRRx_MASK(brgx) == brgx) { 601 brgb = brgx; 602 adg->brg_rate[ADG_HZ_48] = rate / div; 603 ckr |= brg_table[i] << 16; 604 if (req_Hz[ADG_HZ_48]) 605 parent_clk_name = __clk_get_name(clk); 606 if (i == CLKI) 607 approximate = 1; 608 } 609 } 610 } 611 612 if (!(adg->brg_rate[ADG_HZ_48] && req_Hz[ADG_HZ_48]) && 613 !(adg->brg_rate[ADG_HZ_441] && req_Hz[ADG_HZ_441])) 614 goto rsnd_adg_get_clkout_end; 615 616 if (approximate) 617 dev_info(dev, "It uses CLK_I as approximate rate"); 618 619 clkout_name = clkout_name_gen2; 620 clkout_size = ARRAY_SIZE(clkout_name_gen2); 621 if (rsnd_is_gen4(priv)) 622 clkout_size = 1; /* reuse clkout_name_gen2[] */ 623 624 /* 625 * ADG supports BRRA/BRRB output only. 626 * this means all clkout0/1/2/3 will be * same rate 627 */ 628 629 of_property_read_u32(np, "#clock-cells", &count); 630 /* 631 * for clkout 632 */ 633 if (!count) { 634 clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT], 635 parent_clk_name, 0, req_rate[0]); 636 if (IS_ERR_OR_NULL(clk)) 637 goto err; 638 639 adg->clkout[CLKOUT] = clk; 640 adg->clkout_size = 1; 641 of_clk_add_provider(np, of_clk_src_simple_get, clk); 642 } 643 /* 644 * for clkout0/1/2/3 645 */ 646 else { 647 for (i = 0; i < clkout_size; i++) { 648 clk = clk_register_fixed_rate(dev, clkout_name[i], 649 parent_clk_name, 0, 650 req_rate[0]); 651 if (IS_ERR_OR_NULL(clk)) 652 goto err; 653 654 adg->clkout[i] = clk; 655 } 656 adg->onecell.clks = adg->clkout; 657 adg->onecell.clk_num = clkout_size; 658 adg->clkout_size = clkout_size; 659 of_clk_add_provider(np, of_clk_src_onecell_get, 660 &adg->onecell); 661 } 662 663 rsnd_adg_get_clkout_end: 664 adg->ckr = ckr; 665 adg->brga = brga; 666 adg->brgb = brgb; 667 668 return 0; 669 670 err: 671 dev_err(dev, "adg clock OUT get failed\n"); 672 673 rsnd_adg_unregister_clkout(priv); 674 675 return -EIO; 676 } 677 678 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) 679 __printf(3, 4) 680 static void dbg_msg(struct device *dev, struct seq_file *m, 681 const char *fmt, ...) 682 { 683 char msg[128]; 684 va_list args; 685 686 va_start(args, fmt); 687 vsnprintf(msg, sizeof(msg), fmt, args); 688 va_end(args); 689 690 if (m) 691 seq_puts(m, msg); 692 else 693 dev_dbg(dev, "%s", msg); 694 } 695 696 void rsnd_adg_clk_dbg_info(struct rsnd_priv *priv, struct seq_file *m) 697 { 698 struct rsnd_adg *adg = rsnd_priv_to_adg(priv); 699 struct device *dev = rsnd_priv_to_dev(priv); 700 struct clk *clk; 701 int i; 702 703 for_each_rsnd_clkin(clk, adg, i) 704 dbg_msg(dev, m, "%-18s : %pa : %ld\n", 705 __clk_get_name(clk), clk, clk_get_rate(clk)); 706 707 dbg_msg(dev, m, "BRGCKR = 0x%08x, BRRA/BRRB = 0x%x/0x%x\n", 708 adg->ckr, adg->brga, adg->brgb); 709 dbg_msg(dev, m, "BRGA (for 44100 base) = %d\n", adg->brg_rate[ADG_HZ_441]); 710 dbg_msg(dev, m, "BRGB (for 48000 base) = %d\n", adg->brg_rate[ADG_HZ_48]); 711 712 /* 713 * Actual CLKOUT will be exchanged in rsnd_adg_ssi_clk_try_start() 714 * by BRGCKR::BRGCKR_31 715 */ 716 for_each_rsnd_clkout(clk, adg, i) 717 dbg_msg(dev, m, "%-18s : %pa : %ld\n", 718 __clk_get_name(clk), clk, clk_get_rate(clk)); 719 } 720 #else 721 #define rsnd_adg_clk_dbg_info(priv, m) 722 #endif 723 724 int rsnd_adg_probe(struct rsnd_priv *priv) 725 { 726 struct rsnd_adg *adg; 727 struct device *dev = rsnd_priv_to_dev(priv); 728 int ret; 729 730 adg = devm_kzalloc(dev, sizeof(*adg), GFP_KERNEL); 731 if (!adg) 732 return -ENOMEM; 733 734 ret = rsnd_mod_init(priv, &adg->mod, &adg_ops, 735 NULL, 0, 0); 736 if (ret) 737 return ret; 738 739 priv->adg = adg; 740 741 ret = rsnd_adg_get_clkin(priv); 742 if (ret) 743 return ret; 744 745 ret = rsnd_adg_get_clkout(priv); 746 if (ret) 747 return ret; 748 749 rsnd_adg_clk_enable(priv); 750 rsnd_adg_clk_dbg_info(priv, NULL); 751 752 return 0; 753 } 754 755 void rsnd_adg_remove(struct rsnd_priv *priv) 756 { 757 struct device *dev = rsnd_priv_to_dev(priv); 758 struct device_node *np = dev->of_node; 759 760 rsnd_adg_unregister_clkout(priv); 761 762 of_clk_del_provider(np); 763 764 rsnd_adg_clk_disable(priv); 765 766 /* It should be called after rsnd_adg_clk_disable() */ 767 rsnd_adg_null_clk_clean(priv); 768 } 769