summaryrefslogtreecommitdiffstats
path: root/sound/soc/fsl/fsl_audmix.c
blob: a1db1bce330fa5c3874b52a925ef805ff87502d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
// SPDX-License-Identifier: GPL-2.0
/*
 * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver
 *
 * Copyright 2017 NXP
 */

#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>

#include "fsl_audmix.h"

#define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \
	SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts)

static const char
	*tdm_sel[] = { "TDM1", "TDM2", },
	*mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", },
	*width_sel[] = { "16b", "18b", "20b", "24b", "32b", },
	*endis_sel[] = { "Disabled", "Enabled", },
	*updn_sel[] = { "Downward", "Upward", },
	*mask_sel[] = { "Unmask", "Mask", };

static const struct soc_enum fsl_audmix_enum[] = {
/* FSL_AUDMIX_CTR enums */
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MIXCLK_SHIFT, tdm_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTSRC_SHIFT, mode_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTWIDTH_SHIFT, width_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKRTDF_SHIFT, mask_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKCKDF_SHIFT, mask_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCMODE_SHIFT, endis_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCSRC_SHIFT, tdm_sel),
/* FSL_AUDMIX_ATCR0 enums */
SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 0, endis_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 1, updn_sel),
/* FSL_AUDMIX_ATCR1 enums */
SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 0, endis_sel),
SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 1, updn_sel),
};

struct fsl_audmix_state {
	u8 tdms;
	u8 clk;
	char msg[64];
};

static const struct fsl_audmix_state prms[4][4] = {{
	/* DIS->DIS, do nothing */
	{ .tdms = 0, .clk = 0, .msg = "" },
	/* DIS->TDM1*/
	{ .tdms = 1, .clk = 1, .msg = "DIS->TDM1: TDM1 not started!\n" },
	/* DIS->TDM2*/
	{ .tdms = 2, .clk = 2, .msg = "DIS->TDM2: TDM2 not started!\n" },
	/* DIS->MIX */
	{ .tdms = 3, .clk = 0, .msg = "DIS->MIX: Please start both TDMs!\n" }
}, {	/* TDM1->DIS */
	{ .tdms = 1, .clk = 0, .msg = "TDM1->DIS: TDM1 not started!\n" },
	/* TDM1->TDM1, do nothing */
	{ .tdms = 0, .clk = 0, .msg = "" },
	/* TDM1->TDM2 */
	{ .tdms = 3, .clk = 2, .msg = "TDM1->TDM2: Please start both TDMs!\n" },
	/* TDM1->MIX */
	{ .tdms = 3, .clk = 0, .msg = "TDM1->MIX: Please start both TDMs!\n" }
}, {	/* TDM2->DIS */
	{ .tdms = 2, .clk = 0, .msg = "TDM2->DIS: TDM2 not started!\n" },
	/* TDM2->TDM1 */
	{ .tdms = 3, .clk = 1, .msg = "TDM2->TDM1: Please start both TDMs!\n" },
	/* TDM2->TDM2, do nothing */
	{ .tdms = 0, .clk = 0, .msg = "" },
	/* TDM2->MIX */
	{ .tdms = 3, .clk = 0, .msg = "TDM2->MIX: Please start both TDMs!\n" }
}, {	/* MIX->DIS */
	{ .tdms = 3, .clk = 0, .msg = "MIX->DIS: Please start both TDMs!\n" },
	/* MIX->TDM1 */
	{ .tdms = 3, .clk = 1, .msg = "MIX->TDM1: Please start both TDMs!\n" },
	/* MIX->TDM2 */
	{ .tdms = 3, .clk = 2, .msg = "MIX->TDM2: Please start both TDMs!\n" },
	/* MIX->MIX, do nothing */
	{ .tdms = 0, .clk = 0, .msg = "" }
}, };

static int fsl_audmix_state_trans(struct snd_soc_component *comp,
				  unsigned int *mask, unsigned int *ctr,
				  const struct fsl_audmix_state prm)
{
	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
	/* Enforce all required TDMs are started */
	if ((priv->tdms & prm.tdms) != prm.tdms) {
		dev_dbg(comp->dev, "%s", prm.msg);
		return -EINVAL;
	}

	switch (prm.clk) {
	case 1:
	case 2:
		/* Set mix clock */
		(*mask) |= FSL_AUDMIX_CTR_MIXCLK_MASK;
		(*ctr)  |= FSL_AUDMIX_CTR_MIXCLK(prm.clk - 1);
		break;
	default:
		break;
	}

	return 0;
}

static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	unsigned int *item = ucontrol->value.enumerated.item;
	unsigned int reg_val, val, mix_clk;
	int ret = 0;

	/* Get current state */
	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);
	if (ret)
		return ret;

	mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)
			>> FSL_AUDMIX_CTR_MIXCLK_SHIFT);
	val = snd_soc_enum_item_to_val(e, item[0]);

	dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);

	/**
	 * Ensure the current selected mixer clock is available
	 * for configuration propagation
	 */
	if (!(priv->tdms & BIT(mix_clk))) {
		dev_err(comp->dev,
			"Started TDM%d needed for config propagation!\n",
			mix_clk + 1);
		return -EINVAL;
	}

	if (!(priv->tdms & BIT(val))) {
		dev_err(comp->dev,
			"The selected clock source has no TDM%d enabled!\n",
			val + 1);
		return -EINVAL;
	}

	return snd_soc_put_enum_double(kcontrol, ucontrol);
}

static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,
				  struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	unsigned int *item = ucontrol->value.enumerated.item;
	u32 out_src, mix_clk;
	unsigned int reg_val, val, mask = 0, ctr = 0;
	int ret = 0;

	/* Get current state */
	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);
	if (ret)
		return ret;

	/* "From" state */
	out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK)
			>> FSL_AUDMIX_CTR_OUTSRC_SHIFT);
	mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)
			>> FSL_AUDMIX_CTR_MIXCLK_SHIFT);

	/* "To" state */
	val = snd_soc_enum_item_to_val(e, item[0]);

	dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);

	/* Check if state is changing ... */
	if (out_src == val)
		return 0;
	/**
	 * Ensure the current selected mixer clock is available
	 * for configuration propagation
	 */
	if (!(priv->tdms & BIT(mix_clk))) {
		dev_err(comp->dev,
			"Started TDM%d needed for config propagation!\n",
			mix_clk + 1);
		return -EINVAL;
	}

	/* Check state transition constraints */
	ret = fsl_audmix_state_trans(comp, &mask, &ctr, prms[out_src][val]);
	if (ret)
		return ret;

	/* Complete transition to new state */
	mask |= FSL_AUDMIX_CTR_OUTSRC_MASK;
	ctr  |= FSL_AUDMIX_CTR_OUTSRC(val);

	return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);
}

static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = {
	/* FSL_AUDMIX_CTR controls */
	SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0],
		     snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src),
	SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1],
		     snd_soc_get_enum_double, fsl_audmix_put_out_src),
	SOC_ENUM("Output Width", fsl_audmix_enum[2]),
	SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]),
	SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]),
	SOC_ENUM("Sync Mode Config", fsl_audmix_enum[5]),
	SOC_ENUM("Sync Mode Clk Source", fsl_audmix_enum[6]),
	/* TDM1 Attenuation controls */
	SOC_ENUM("TDM1 Attenuation", fsl_audmix_enum[7]),
	SOC_ENUM("TDM1 Attenuation Direction", fsl_audmix_enum[8]),
	SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AUDMIX_ATCR0,
		   2, 0x00fff, 0),
	SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AUDMIX_ATIVAL0,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP0,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN0,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT0,
		   0, 0x3ffff, 0),
	/* TDM2 Attenuation controls */
	SOC_ENUM("TDM2 Attenuation", fsl_audmix_enum[9]),
	SOC_ENUM("TDM2 Attenuation Direction", fsl_audmix_enum[10]),
	SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AUDMIX_ATCR1,
		   2, 0x00fff, 0),
	SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AUDMIX_ATIVAL1,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP1,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN1,
		   0, 0x3ffff, 0),
	SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT1,
		   0, 0x3ffff, 0),
};

static int fsl_audmix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_component *comp = dai->component;
	u32 mask = 0, ctr = 0;

	/* AUDMIX is working in DSP_A format only */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_A:
		break;
	default:
		return -EINVAL;
	}

	/* For playback the AUDMIX is slave, and for record is master */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_IB_NF:
		/* Output data will be written on positive edge of the clock */
		ctr |= FSL_AUDMIX_CTR_OUTCKPOL(0);
		break;
	case SND_SOC_DAIFMT_NB_NF:
		/* Output data will be written on negative edge of the clock */
		ctr |= FSL_AUDMIX_CTR_OUTCKPOL(1);
		break;
	default:
		return -EINVAL;
	}

	mask |= FSL_AUDMIX_CTR_OUTCKPOL_MASK;

	return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);
}

static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd,
				  struct snd_soc_dai *dai)
{
	struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai);
	unsigned long lock_flags;

	/* Capture stream shall not be handled */
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		return 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		spin_lock_irqsave(&priv->lock, lock_flags);
		priv->tdms |= BIT(dai->driver->id);
		spin_unlock_irqrestore(&priv->lock, lock_flags);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		spin_lock_irqsave(&priv->lock, lock_flags);
		priv->tdms &= ~BIT(dai->driver->id);
		spin_unlock_irqrestore(&priv->lock, lock_flags);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static const struct snd_soc_dai_ops fsl_audmix_dai_ops = {
	.set_fmt      = fsl_audmix_dai_set_fmt,
	.trigger      = fsl_audmix_dai_trigger,
};

static struct snd_soc_dai_driver fsl_audmix_dai[] = {
	{
		.id   = 0,
		.name = "audmix-0",
		.playback = {
			.stream_name = "AUDMIX-Playback-0",
			.channels_min = 8,
			.channels_max = 8,
			.rate_min = 8000,
			.rate_max = 96000,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = FSL_AUDMIX_FORMATS,
		},
		.capture = {
			.stream_name = "AUDMIX-Capture-0",
			.channels_min = 8,
			.channels_max = 8,
			.rate_min = 8000,
			.rate_max = 96000,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = FSL_AUDMIX_FORMATS,
		},
		.ops = &fsl_audmix_dai_ops,
	},
	{
		.id   = 1,
		.name = "audmix-1",
		.playback = {
			.stream_name = "AUDMIX-Playback-1",
			.channels_min = 8,
			.channels_max = 8,
			.rate_min = 8000,
			.rate_max = 96000,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = FSL_AUDMIX_FORMATS,
		},
		.capture = {
			.stream_name = "AUDMIX-Capture-1",
			.channels_min = 8,
			.channels_max = 8,
			.rate_min = 8000,
			.rate_max = 96000,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = FSL_AUDMIX_FORMATS,
		},
		.ops = &fsl_audmix_dai_ops,
	},
};

static const struct snd_soc_component_driver fsl_audmix_component = {
	.name		  = "fsl-audmix-dai",
	.controls	  = fsl_audmix_snd_controls,
	.num_controls	  = ARRAY_SIZE(fsl_audmix_snd_controls),
};

static bool fsl_audmix_readable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case FSL_AUDMIX_CTR:
	case FSL_AUDMIX_STR:
	case FSL_AUDMIX_ATCR0:
	case FSL_AUDMIX_ATIVAL0:
	case FSL_AUDMIX_ATSTPUP0:
	case FSL_AUDMIX_ATSTPDN0:
	case FSL_AUDMIX_ATSTPTGT0:
	case FSL_AUDMIX_ATTNVAL0:
	case FSL_AUDMIX_ATSTP0:
	case FSL_AUDMIX_ATCR1:
	case FSL_AUDMIX_ATIVAL1:
	case FSL_AUDMIX_ATSTPUP1:
	case FSL_AUDMIX_ATSTPDN1:
	case FSL_AUDMIX_ATSTPTGT1:
	case FSL_AUDMIX_ATTNVAL1:
	case FSL_AUDMIX_ATSTP1:
		return true;
	default:
		return false;
	}
}

static bool fsl_audmix_writeable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case FSL_AUDMIX_CTR:
	case FSL_AUDMIX_ATCR0:
	case FSL_AUDMIX_ATIVAL0:
	case FSL_AUDMIX_ATSTPUP0:
	case FSL_AUDMIX_ATSTPDN0:
	case FSL_AUDMIX_ATSTPTGT0:
	case FSL_AUDMIX_ATCR1:
	case FSL_AUDMIX_ATIVAL1:
	case FSL_AUDMIX_ATSTPUP1:
	case FSL_AUDMIX_ATSTPDN1:
	case FSL_AUDMIX_ATSTPTGT1:
		return true;
	default:
		return false;
	}
}

static const struct reg_default fsl_audmix_reg[] = {
	{ FSL_AUDMIX_CTR,       0x00060 },
	{ FSL_AUDMIX_STR,       0x00003 },
	{ FSL_AUDMIX_ATCR0,     0x00000 },
	{ FSL_AUDMIX_ATIVAL0,   0x3FFFF },
	{ FSL_AUDMIX_ATSTPUP0,  0x2AAAA },
	{ FSL_AUDMIX_ATSTPDN0,  0x30000 },
	{ FSL_AUDMIX_ATSTPTGT0, 0x00010 },
	{ FSL_AUDMIX_ATTNVAL0,  0x00000 },
	{ FSL_AUDMIX_ATSTP0,    0x00000 },
	{ FSL_AUDMIX_ATCR1,     0x00000 },
	{ FSL_AUDMIX_ATIVAL1,   0x3FFFF },
	{ FSL_AUDMIX_ATSTPUP1,  0x2AAAA },
	{ FSL_AUDMIX_ATSTPDN1,  0x30000 },
	{ FSL_AUDMIX_ATSTPTGT1, 0x00010 },
	{ FSL_AUDMIX_ATTNVAL1,  0x00000 },
	{ FSL_AUDMIX_ATSTP1,    0x00000 },
};

static const struct regmap_config fsl_audmix_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = FSL_AUDMIX_ATSTP1,
	.reg_defaults = fsl_audmix_reg,
	.num_reg_defaults = ARRAY_SIZE(fsl_audmix_reg),
	.readable_reg = fsl_audmix_readable_reg,
	.writeable_reg = fsl_audmix_writeable_reg,
	.cache_type = REGCACHE_FLAT,
};

static const struct of_device_id fsl_audmix_ids[] = {
	{
		.compatible = "fsl,imx8qm-audmix",
		.data = "imx-audmix",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_audmix_ids);

static int fsl_audmix_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct fsl_audmix *priv;
	const char *mdrv;
	const struct of_device_id *of_id;
	void __iomem *regs;
	int ret;

	of_id = of_match_device(fsl_audmix_ids, dev);
	if (!of_id || !of_id->data)
		return -EINVAL;

	mdrv = of_id->data;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	/* Get the addresses */
	regs = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(regs))
		return PTR_ERR(regs);

	priv->regmap = devm_regmap_init_mmio_clk(dev, "ipg", regs,
						 &fsl_audmix_regmap_config);
	if (IS_ERR(priv->regmap)) {
		dev_err(dev, "failed to init regmap\n");
		return PTR_ERR(priv->regmap);
	}

	priv->ipg_clk = devm_clk_get(dev, "ipg");
	if (IS_ERR(priv->ipg_clk)) {
		dev_err(dev, "failed to get ipg clock\n");
		return PTR_ERR(priv->ipg_clk);
	}

	spin_lock_init(&priv->lock);
	platform_set_drvdata(pdev, priv);
	pm_runtime_enable(dev);

	ret = devm_snd_soc_register_component(dev, &fsl_audmix_component,
					      fsl_audmix_dai,
					      ARRAY_SIZE(fsl_audmix_dai));
	if (ret) {
		dev_err(dev, "failed to register ASoC DAI\n");
		return ret;
	}

	priv->pdev = platform_device_register_data(dev, mdrv, 0, NULL, 0);
	if (IS_ERR(priv->pdev)) {
		ret = PTR_ERR(priv->pdev);
		dev_err(dev, "failed to register platform %s: %d\n", mdrv, ret);
	}

	return ret;
}

static int fsl_audmix_remove(struct platform_device *pdev)
{
	struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev);

	if (priv->pdev)
		platform_device_unregister(priv->pdev);

	return 0;
}

#ifdef CONFIG_PM
static int fsl_audmix_runtime_resume(struct device *dev)
{
	struct fsl_audmix *priv = dev_get_drvdata(dev);
	int ret;

	ret = clk_prepare_enable(priv->ipg_clk);
	if (ret) {
		dev_err(dev, "Failed to enable IPG clock: %d\n", ret);
		return ret;
	}

	regcache_cache_only(priv->regmap, false);
	regcache_mark_dirty(priv->regmap);

	return regcache_sync(priv->regmap);
}

static int fsl_audmix_runtime_suspend(struct device *dev)
{
	struct fsl_audmix *priv = dev_get_drvdata(dev);

	regcache_cache_only(priv->regmap, true);

	clk_disable_unprepare(priv->ipg_clk);

	return 0;
}
#endif /* CONFIG_PM */

static const struct dev_pm_ops fsl_audmix_pm = {
	SET_RUNTIME_PM_OPS(fsl_audmix_runtime_suspend,
			   fsl_audmix_runtime_resume,
			   NULL)
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				pm_runtime_force_resume)
};

static struct platform_driver fsl_audmix_driver = {
	.probe = fsl_audmix_probe,
	.remove = fsl_audmix_remove,
	.driver = {
		.name = "fsl-audmix",
		.of_match_table = fsl_audmix_ids,
		.pm = &fsl_audmix_pm,
	},
};
module_platform_driver(fsl_audmix_driver);

MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver");
MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
MODULE_ALIAS("platform:fsl-audmix");
MODULE_LICENSE("GPL v2");