1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver 4 * 5 * Copyright 2017 NXP 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/module.h> 10 #include <linux/of_platform.h> 11 #include <linux/pm_runtime.h> 12 #include <sound/soc.h> 13 #include <sound/pcm_params.h> 14 15 #include "fsl_audmix.h" 16 17 #define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \ 18 SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts) 19 20 static const char 21 *tdm_sel[] = { "TDM1", "TDM2", }, 22 *mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", }, 23 *width_sel[] = { "16b", "18b", "20b", "24b", "32b", }, 24 *endis_sel[] = { "Disabled", "Enabled", }, 25 *updn_sel[] = { "Downward", "Upward", }, 26 *mask_sel[] = { "Unmask", "Mask", }; 27 28 static const struct soc_enum fsl_audmix_enum[] = { 29 /* FSL_AUDMIX_CTR enums */ 30 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MIXCLK_SHIFT, tdm_sel), 31 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTSRC_SHIFT, mode_sel), 32 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTWIDTH_SHIFT, width_sel), 33 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKRTDF_SHIFT, mask_sel), 34 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKCKDF_SHIFT, mask_sel), 35 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCMODE_SHIFT, endis_sel), 36 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCSRC_SHIFT, tdm_sel), 37 /* FSL_AUDMIX_ATCR0 enums */ 38 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 0, endis_sel), 39 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 1, updn_sel), 40 /* FSL_AUDMIX_ATCR1 enums */ 41 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 0, endis_sel), 42 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 1, updn_sel), 43 }; 44 45 struct fsl_audmix_state { 46 u8 tdms; 47 u8 clk; 48 char msg[64]; 49 }; 50 51 static const struct fsl_audmix_state prms[4][4] = {{ 52 /* DIS->DIS, do nothing */ 53 { .tdms = 0, .clk = 0, .msg = "" }, 54 /* DIS->TDM1*/ 55 { .tdms = 1, .clk = 1, .msg = "DIS->TDM1: TDM1 not started!\n" }, 56 /* DIS->TDM2*/ 57 { .tdms = 2, .clk = 2, .msg = "DIS->TDM2: TDM2 not started!\n" }, 58 /* DIS->MIX */ 59 { .tdms = 3, .clk = 0, .msg = "DIS->MIX: Please start both TDMs!\n" } 60 }, { /* TDM1->DIS */ 61 { .tdms = 1, .clk = 0, .msg = "TDM1->DIS: TDM1 not started!\n" }, 62 /* TDM1->TDM1, do nothing */ 63 { .tdms = 0, .clk = 0, .msg = "" }, 64 /* TDM1->TDM2 */ 65 { .tdms = 3, .clk = 2, .msg = "TDM1->TDM2: Please start both TDMs!\n" }, 66 /* TDM1->MIX */ 67 { .tdms = 3, .clk = 0, .msg = "TDM1->MIX: Please start both TDMs!\n" } 68 }, { /* TDM2->DIS */ 69 { .tdms = 2, .clk = 0, .msg = "TDM2->DIS: TDM2 not started!\n" }, 70 /* TDM2->TDM1 */ 71 { .tdms = 3, .clk = 1, .msg = "TDM2->TDM1: Please start both TDMs!\n" }, 72 /* TDM2->TDM2, do nothing */ 73 { .tdms = 0, .clk = 0, .msg = "" }, 74 /* TDM2->MIX */ 75 { .tdms = 3, .clk = 0, .msg = "TDM2->MIX: Please start both TDMs!\n" } 76 }, { /* MIX->DIS */ 77 { .tdms = 3, .clk = 0, .msg = "MIX->DIS: Please start both TDMs!\n" }, 78 /* MIX->TDM1 */ 79 { .tdms = 3, .clk = 1, .msg = "MIX->TDM1: Please start both TDMs!\n" }, 80 /* MIX->TDM2 */ 81 { .tdms = 3, .clk = 2, .msg = "MIX->TDM2: Please start both TDMs!\n" }, 82 /* MIX->MIX, do nothing */ 83 { .tdms = 0, .clk = 0, .msg = "" } 84 }, }; 85 86 static int fsl_audmix_state_trans(struct snd_soc_component *comp, 87 unsigned int *mask, unsigned int *ctr, 88 const struct fsl_audmix_state prm) 89 { 90 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); 91 /* Enforce all required TDMs are started */ 92 if ((priv->tdms & prm.tdms) != prm.tdms) { 93 dev_dbg(comp->dev, "%s", prm.msg); 94 return -EINVAL; 95 } 96 97 switch (prm.clk) { 98 case 1: 99 case 2: 100 /* Set mix clock */ 101 (*mask) |= FSL_AUDMIX_CTR_MIXCLK_MASK; 102 (*ctr) |= FSL_AUDMIX_CTR_MIXCLK(prm.clk - 1); 103 break; 104 default: 105 break; 106 } 107 108 return 0; 109 } 110 111 static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol, 112 struct snd_ctl_elem_value *ucontrol) 113 { 114 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); 115 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); 116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 117 unsigned int *item = ucontrol->value.enumerated.item; 118 unsigned int reg_val, val, mix_clk; 119 120 /* Get current state */ 121 reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR); 122 mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK) 123 >> FSL_AUDMIX_CTR_MIXCLK_SHIFT); 124 val = snd_soc_enum_item_to_val(e, item[0]); 125 126 dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val); 127 128 /** 129 * Ensure the current selected mixer clock is available 130 * for configuration propagation 131 */ 132 if (!(priv->tdms & BIT(mix_clk))) { 133 dev_err(comp->dev, 134 "Started TDM%d needed for config propagation!\n", 135 mix_clk + 1); 136 return -EINVAL; 137 } 138 139 if (!(priv->tdms & BIT(val))) { 140 dev_err(comp->dev, 141 "The selected clock source has no TDM%d enabled!\n", 142 val + 1); 143 return -EINVAL; 144 } 145 146 return snd_soc_put_enum_double(kcontrol, ucontrol); 147 } 148 149 static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol, 150 struct snd_ctl_elem_value *ucontrol) 151 { 152 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); 153 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); 154 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 155 unsigned int *item = ucontrol->value.enumerated.item; 156 u32 out_src, mix_clk; 157 unsigned int reg_val, val, mask = 0, ctr = 0; 158 int ret; 159 160 /* Get current state */ 161 reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR); 162 163 /* "From" state */ 164 out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK) 165 >> FSL_AUDMIX_CTR_OUTSRC_SHIFT); 166 mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK) 167 >> FSL_AUDMIX_CTR_MIXCLK_SHIFT); 168 169 /* "To" state */ 170 val = snd_soc_enum_item_to_val(e, item[0]); 171 172 dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val); 173 174 /* Check if state is changing ... */ 175 if (out_src == val) 176 return 0; 177 /** 178 * Ensure the current selected mixer clock is available 179 * for configuration propagation 180 */ 181 if (!(priv->tdms & BIT(mix_clk))) { 182 dev_err(comp->dev, 183 "Started TDM%d needed for config propagation!\n", 184 mix_clk + 1); 185 return -EINVAL; 186 } 187 188 /* Check state transition constraints */ 189 ret = fsl_audmix_state_trans(comp, &mask, &ctr, prms[out_src][val]); 190 if (ret) 191 return ret; 192 193 /* Complete transition to new state */ 194 mask |= FSL_AUDMIX_CTR_OUTSRC_MASK; 195 ctr |= FSL_AUDMIX_CTR_OUTSRC(val); 196 197 return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr); 198 } 199 200 static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = { 201 /* FSL_AUDMIX_CTR controls */ 202 SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0], 203 snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src), 204 SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1], 205 snd_soc_get_enum_double, fsl_audmix_put_out_src), 206 SOC_ENUM("Output Width", fsl_audmix_enum[2]), 207 SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]), 208 SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]), 209 SOC_ENUM("Sync Mode Config", fsl_audmix_enum[5]), 210 SOC_ENUM("Sync Mode Clk Source", fsl_audmix_enum[6]), 211 /* TDM1 Attenuation controls */ 212 SOC_ENUM("TDM1 Attenuation", fsl_audmix_enum[7]), 213 SOC_ENUM("TDM1 Attenuation Direction", fsl_audmix_enum[8]), 214 SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AUDMIX_ATCR0, 215 2, 0x00fff, 0), 216 SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AUDMIX_ATIVAL0, 217 0, 0x3ffff, 0), 218 SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP0, 219 0, 0x3ffff, 0), 220 SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN0, 221 0, 0x3ffff, 0), 222 SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT0, 223 0, 0x3ffff, 0), 224 /* TDM2 Attenuation controls */ 225 SOC_ENUM("TDM2 Attenuation", fsl_audmix_enum[9]), 226 SOC_ENUM("TDM2 Attenuation Direction", fsl_audmix_enum[10]), 227 SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AUDMIX_ATCR1, 228 2, 0x00fff, 0), 229 SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AUDMIX_ATIVAL1, 230 0, 0x3ffff, 0), 231 SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP1, 232 0, 0x3ffff, 0), 233 SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN1, 234 0, 0x3ffff, 0), 235 SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT1, 236 0, 0x3ffff, 0), 237 }; 238 239 static int fsl_audmix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 240 { 241 struct snd_soc_component *comp = dai->component; 242 u32 mask = 0, ctr = 0; 243 244 /* AUDMIX is working in DSP_A format only */ 245 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 246 case SND_SOC_DAIFMT_DSP_A: 247 break; 248 default: 249 return -EINVAL; 250 } 251 252 /* For playback the AUDMIX is consumer, and for record is provider */ 253 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 254 case SND_SOC_DAIFMT_BC_FC: 255 case SND_SOC_DAIFMT_BP_FP: 256 break; 257 default: 258 return -EINVAL; 259 } 260 261 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 262 case SND_SOC_DAIFMT_IB_NF: 263 /* Output data will be written on positive edge of the clock */ 264 ctr |= FSL_AUDMIX_CTR_OUTCKPOL(0); 265 break; 266 case SND_SOC_DAIFMT_NB_NF: 267 /* Output data will be written on negative edge of the clock */ 268 ctr |= FSL_AUDMIX_CTR_OUTCKPOL(1); 269 break; 270 default: 271 return -EINVAL; 272 } 273 274 mask |= FSL_AUDMIX_CTR_OUTCKPOL_MASK; 275 276 return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr); 277 } 278 279 static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd, 280 struct snd_soc_dai *dai) 281 { 282 struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai); 283 unsigned long lock_flags; 284 285 /* Capture stream shall not be handled */ 286 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 287 return 0; 288 289 switch (cmd) { 290 case SNDRV_PCM_TRIGGER_START: 291 case SNDRV_PCM_TRIGGER_RESUME: 292 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 293 spin_lock_irqsave(&priv->lock, lock_flags); 294 priv->tdms |= BIT(dai->driver->id); 295 spin_unlock_irqrestore(&priv->lock, lock_flags); 296 break; 297 case SNDRV_PCM_TRIGGER_STOP: 298 case SNDRV_PCM_TRIGGER_SUSPEND: 299 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 300 spin_lock_irqsave(&priv->lock, lock_flags); 301 priv->tdms &= ~BIT(dai->driver->id); 302 spin_unlock_irqrestore(&priv->lock, lock_flags); 303 break; 304 default: 305 return -EINVAL; 306 } 307 308 return 0; 309 } 310 311 static const struct snd_soc_dai_ops fsl_audmix_dai_ops = { 312 .set_fmt = fsl_audmix_dai_set_fmt, 313 .trigger = fsl_audmix_dai_trigger, 314 }; 315 316 static struct snd_soc_dai_driver fsl_audmix_dai[] = { 317 { 318 .id = 0, 319 .name = "audmix-0", 320 .playback = { 321 .stream_name = "AUDMIX-Playback-0", 322 .channels_min = 8, 323 .channels_max = 8, 324 .rate_min = 8000, 325 .rate_max = 96000, 326 .rates = SNDRV_PCM_RATE_8000_96000, 327 .formats = FSL_AUDMIX_FORMATS, 328 }, 329 .ops = &fsl_audmix_dai_ops, 330 }, 331 { 332 .id = 1, 333 .name = "audmix-1", 334 .playback = { 335 .stream_name = "AUDMIX-Playback-1", 336 .channels_min = 8, 337 .channels_max = 8, 338 .rate_min = 8000, 339 .rate_max = 96000, 340 .rates = SNDRV_PCM_RATE_8000_96000, 341 .formats = FSL_AUDMIX_FORMATS, 342 }, 343 .ops = &fsl_audmix_dai_ops, 344 }, 345 { 346 .id = 2, 347 .name = "audmix-2", 348 .capture = { 349 .stream_name = "AUDMIX-Capture-0", 350 .channels_min = 8, 351 .channels_max = 8, 352 .rate_min = 8000, 353 .rate_max = 96000, 354 .rates = SNDRV_PCM_RATE_8000_96000, 355 .formats = FSL_AUDMIX_FORMATS, 356 }, 357 .ops = &fsl_audmix_dai_ops, 358 }, 359 }; 360 361 static const struct snd_soc_component_driver fsl_audmix_component = { 362 .name = "fsl-audmix-dai", 363 .controls = fsl_audmix_snd_controls, 364 .num_controls = ARRAY_SIZE(fsl_audmix_snd_controls), 365 }; 366 367 static bool fsl_audmix_readable_reg(struct device *dev, unsigned int reg) 368 { 369 switch (reg) { 370 case FSL_AUDMIX_CTR: 371 case FSL_AUDMIX_STR: 372 case FSL_AUDMIX_ATCR0: 373 case FSL_AUDMIX_ATIVAL0: 374 case FSL_AUDMIX_ATSTPUP0: 375 case FSL_AUDMIX_ATSTPDN0: 376 case FSL_AUDMIX_ATSTPTGT0: 377 case FSL_AUDMIX_ATTNVAL0: 378 case FSL_AUDMIX_ATSTP0: 379 case FSL_AUDMIX_ATCR1: 380 case FSL_AUDMIX_ATIVAL1: 381 case FSL_AUDMIX_ATSTPUP1: 382 case FSL_AUDMIX_ATSTPDN1: 383 case FSL_AUDMIX_ATSTPTGT1: 384 case FSL_AUDMIX_ATTNVAL1: 385 case FSL_AUDMIX_ATSTP1: 386 return true; 387 default: 388 return false; 389 } 390 } 391 392 static bool fsl_audmix_writeable_reg(struct device *dev, unsigned int reg) 393 { 394 switch (reg) { 395 case FSL_AUDMIX_CTR: 396 case FSL_AUDMIX_ATCR0: 397 case FSL_AUDMIX_ATIVAL0: 398 case FSL_AUDMIX_ATSTPUP0: 399 case FSL_AUDMIX_ATSTPDN0: 400 case FSL_AUDMIX_ATSTPTGT0: 401 case FSL_AUDMIX_ATCR1: 402 case FSL_AUDMIX_ATIVAL1: 403 case FSL_AUDMIX_ATSTPUP1: 404 case FSL_AUDMIX_ATSTPDN1: 405 case FSL_AUDMIX_ATSTPTGT1: 406 return true; 407 default: 408 return false; 409 } 410 } 411 412 static const struct reg_default fsl_audmix_reg[] = { 413 { FSL_AUDMIX_CTR, 0x00060 }, 414 { FSL_AUDMIX_STR, 0x00003 }, 415 { FSL_AUDMIX_ATCR0, 0x00000 }, 416 { FSL_AUDMIX_ATIVAL0, 0x3FFFF }, 417 { FSL_AUDMIX_ATSTPUP0, 0x2AAAA }, 418 { FSL_AUDMIX_ATSTPDN0, 0x30000 }, 419 { FSL_AUDMIX_ATSTPTGT0, 0x00010 }, 420 { FSL_AUDMIX_ATTNVAL0, 0x00000 }, 421 { FSL_AUDMIX_ATSTP0, 0x00000 }, 422 { FSL_AUDMIX_ATCR1, 0x00000 }, 423 { FSL_AUDMIX_ATIVAL1, 0x3FFFF }, 424 { FSL_AUDMIX_ATSTPUP1, 0x2AAAA }, 425 { FSL_AUDMIX_ATSTPDN1, 0x30000 }, 426 { FSL_AUDMIX_ATSTPTGT1, 0x00010 }, 427 { FSL_AUDMIX_ATTNVAL1, 0x00000 }, 428 { FSL_AUDMIX_ATSTP1, 0x00000 }, 429 }; 430 431 static const struct regmap_config fsl_audmix_regmap_config = { 432 .reg_bits = 32, 433 .reg_stride = 4, 434 .val_bits = 32, 435 .max_register = FSL_AUDMIX_ATSTP1, 436 .reg_defaults = fsl_audmix_reg, 437 .num_reg_defaults = ARRAY_SIZE(fsl_audmix_reg), 438 .readable_reg = fsl_audmix_readable_reg, 439 .writeable_reg = fsl_audmix_writeable_reg, 440 .cache_type = REGCACHE_FLAT, 441 }; 442 443 static const struct of_device_id fsl_audmix_ids[] = { 444 { 445 .compatible = "fsl,imx8qm-audmix", 446 }, 447 { /* sentinel */ } 448 }; 449 MODULE_DEVICE_TABLE(of, fsl_audmix_ids); 450 451 static int fsl_audmix_probe(struct platform_device *pdev) 452 { 453 struct device *dev = &pdev->dev; 454 struct fsl_audmix *priv; 455 void __iomem *regs; 456 int ret; 457 458 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 459 if (!priv) 460 return -ENOMEM; 461 462 /* Get the addresses */ 463 regs = devm_platform_ioremap_resource(pdev, 0); 464 if (IS_ERR(regs)) 465 return PTR_ERR(regs); 466 467 priv->regmap = devm_regmap_init_mmio(dev, regs, &fsl_audmix_regmap_config); 468 if (IS_ERR(priv->regmap)) { 469 dev_err(dev, "failed to init regmap\n"); 470 return PTR_ERR(priv->regmap); 471 } 472 473 priv->ipg_clk = devm_clk_get(dev, "ipg"); 474 if (IS_ERR(priv->ipg_clk)) { 475 dev_err(dev, "failed to get ipg clock\n"); 476 return PTR_ERR(priv->ipg_clk); 477 } 478 479 spin_lock_init(&priv->lock); 480 platform_set_drvdata(pdev, priv); 481 pm_runtime_enable(dev); 482 483 ret = devm_snd_soc_register_component(dev, &fsl_audmix_component, 484 fsl_audmix_dai, 485 ARRAY_SIZE(fsl_audmix_dai)); 486 if (ret) { 487 dev_err(dev, "failed to register ASoC DAI\n"); 488 goto err_disable_pm; 489 } 490 491 priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0); 492 if (IS_ERR(priv->pdev)) { 493 ret = PTR_ERR(priv->pdev); 494 dev_err(dev, "failed to register platform: %d\n", ret); 495 goto err_disable_pm; 496 } 497 498 return 0; 499 500 err_disable_pm: 501 pm_runtime_disable(dev); 502 return ret; 503 } 504 505 static void fsl_audmix_remove(struct platform_device *pdev) 506 { 507 struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev); 508 509 pm_runtime_disable(&pdev->dev); 510 511 if (priv->pdev) 512 platform_device_unregister(priv->pdev); 513 } 514 515 #ifdef CONFIG_PM 516 static int fsl_audmix_runtime_resume(struct device *dev) 517 { 518 struct fsl_audmix *priv = dev_get_drvdata(dev); 519 int ret; 520 521 ret = clk_prepare_enable(priv->ipg_clk); 522 if (ret) { 523 dev_err(dev, "Failed to enable IPG clock: %d\n", ret); 524 return ret; 525 } 526 527 regcache_cache_only(priv->regmap, false); 528 regcache_mark_dirty(priv->regmap); 529 530 return regcache_sync(priv->regmap); 531 } 532 533 static int fsl_audmix_runtime_suspend(struct device *dev) 534 { 535 struct fsl_audmix *priv = dev_get_drvdata(dev); 536 537 regcache_cache_only(priv->regmap, true); 538 539 clk_disable_unprepare(priv->ipg_clk); 540 541 return 0; 542 } 543 #endif /* CONFIG_PM */ 544 545 static const struct dev_pm_ops fsl_audmix_pm = { 546 SET_RUNTIME_PM_OPS(fsl_audmix_runtime_suspend, 547 fsl_audmix_runtime_resume, 548 NULL) 549 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 550 pm_runtime_force_resume) 551 }; 552 553 static struct platform_driver fsl_audmix_driver = { 554 .probe = fsl_audmix_probe, 555 .remove_new = fsl_audmix_remove, 556 .driver = { 557 .name = "fsl-audmix", 558 .of_match_table = fsl_audmix_ids, 559 .pm = &fsl_audmix_pm, 560 }, 561 }; 562 module_platform_driver(fsl_audmix_driver); 563 564 MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver"); 565 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); 566 MODULE_ALIAS("platform:fsl-audmix"); 567 MODULE_LICENSE("GPL v2"); 568