xref: /openbmc/linux/sound/soc/uniphier/aio-cpu.c (revision e2bd6bad) 
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Socionext UniPhier AIO ALSA CPU DAI driver.
4 //
5 // Copyright (c) 2016-2018 Socionext Inc.
6 
7 #include <linux/clk.h>
8 #include <linux/errno.h>
9 #include <linux/kernel.h>
10 #include <linux/mfd/syscon.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_platform.h>
14 #include <linux/platform_device.h>
15 #include <linux/reset.h>
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20 
21 #include "aio.h"
22 
23 static bool is_valid_pll(struct uniphier_aio_chip *chip, int pll_id)
24 {
25 	struct device *dev = &chip->pdev->dev;
26 
27 	if (pll_id < 0 || chip->num_plls <= pll_id) {
28 		dev_err(dev, "PLL(%d) is not supported\n", pll_id);
29 		return false;
30 	}
31 
32 	return chip->plls[pll_id].enable;
33 }
34 
35 /**
36  * find_volume - find volume supported HW port by HW port number
37  * @chip: the AIO chip pointer
38  * @oport_hw: HW port number, one of AUD_HW_XXXX
39  *
40  * Find AIO device from device list by HW port number. Volume feature is
41  * available only in Output and PCM ports, this limitation comes from HW
42  * specifications.
43  *
44  * Return: The pointer of AIO substream if successful, otherwise NULL on error.
45  */
46 static struct uniphier_aio_sub *find_volume(struct uniphier_aio_chip *chip,
47 					    int oport_hw)
48 {
49 	int i;
50 
51 	for (i = 0; i < chip->num_aios; i++) {
52 		struct uniphier_aio_sub *sub = &chip->aios[i].sub[0];
53 
54 		if (!sub->swm)
55 			continue;
56 
57 		if (sub->swm->oport.hw == oport_hw)
58 			return sub;
59 	}
60 
61 	return NULL;
62 }
63 
64 static bool match_spec(const struct uniphier_aio_spec *spec,
65 		       const char *name, int dir)
66 {
67 	if (dir == SNDRV_PCM_STREAM_PLAYBACK &&
68 	    spec->swm.dir != PORT_DIR_OUTPUT) {
69 		return false;
70 	}
71 
72 	if (dir == SNDRV_PCM_STREAM_CAPTURE &&
73 	    spec->swm.dir != PORT_DIR_INPUT) {
74 		return false;
75 	}
76 
77 	if (spec->name && strcmp(spec->name, name) == 0)
78 		return true;
79 
80 	if (spec->gname && strcmp(spec->gname, name) == 0)
81 		return true;
82 
83 	return false;
84 }
85 
86 /**
87  * find_spec - find HW specification info by name
88  * @aio: the AIO device pointer
89  * @name: name of device
90  * @direction: the direction of substream, SNDRV_PCM_STREAM_*
91  *
92  * Find hardware specification information from list by device name. This
93  * information is used for telling the difference of SoCs to driver.
94  *
95  * Specification list is array of 'struct uniphier_aio_spec' which is defined
96  * in each drivers (see: aio-i2s.c).
97  *
98  * Return: The pointer of hardware specification of AIO if successful,
99  * otherwise NULL on error.
100  */
101 static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio,
102 						 const char *name,
103 						 int direction)
104 {
105 	const struct uniphier_aio_chip_spec *chip_spec = aio->chip->chip_spec;
106 	int i;
107 
108 	for (i = 0; i < chip_spec->num_specs; i++) {
109 		const struct uniphier_aio_spec *spec = &chip_spec->specs[i];
110 
111 		if (match_spec(spec, name, direction))
112 			return spec;
113 	}
114 
115 	return NULL;
116 }
117 
118 /**
119  * find_divider - find clock divider by frequency
120  * @aio: the AIO device pointer
121  * @pll_id: PLL ID, should be AUD_PLL_XX
122  * @freq: required frequency
123  *
124  * Find suitable clock divider by frequency.
125  *
126  * Return: The ID of PLL if successful, otherwise negative error value.
127  */
128 static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq)
129 {
130 	struct uniphier_aio_pll *pll;
131 	int mul[] = { 1, 1, 1, 2, };
132 	int div[] = { 2, 3, 1, 3, };
133 	int i;
134 
135 	if (!is_valid_pll(aio->chip, pll_id))
136 		return -EINVAL;
137 
138 	pll = &aio->chip->plls[pll_id];
139 	for (i = 0; i < ARRAY_SIZE(mul); i++)
140 		if (pll->freq * mul[i] / div[i] == freq)
141 			return i;
142 
143 	return -ENOTSUPP;
144 }
145 
146 static int uniphier_aio_set_sysclk(struct snd_soc_dai *dai, int clk_id,
147 				   unsigned int freq, int dir)
148 {
149 	struct uniphier_aio *aio = uniphier_priv(dai);
150 	struct device *dev = &aio->chip->pdev->dev;
151 	bool pll_auto = false;
152 	int pll_id, div_id;
153 
154 	switch (clk_id) {
155 	case AUD_CLK_IO:
156 		return -ENOTSUPP;
157 	case AUD_CLK_A1:
158 		pll_id = AUD_PLL_A1;
159 		break;
160 	case AUD_CLK_F1:
161 		pll_id = AUD_PLL_F1;
162 		break;
163 	case AUD_CLK_A2:
164 		pll_id = AUD_PLL_A2;
165 		break;
166 	case AUD_CLK_F2:
167 		pll_id = AUD_PLL_F2;
168 		break;
169 	case AUD_CLK_A:
170 		pll_id = AUD_PLL_A1;
171 		pll_auto = true;
172 		break;
173 	case AUD_CLK_F:
174 		pll_id = AUD_PLL_F1;
175 		pll_auto = true;
176 		break;
177 	case AUD_CLK_APLL:
178 		pll_id = AUD_PLL_APLL;
179 		break;
180 	case AUD_CLK_RX0:
181 		pll_id = AUD_PLL_RX0;
182 		break;
183 	case AUD_CLK_USB0:
184 		pll_id = AUD_PLL_USB0;
185 		break;
186 	case AUD_CLK_HSC0:
187 		pll_id = AUD_PLL_HSC0;
188 		break;
189 	default:
190 		dev_err(dev, "Sysclk(%d) is not supported\n", clk_id);
191 		return -EINVAL;
192 	}
193 
194 	if (pll_auto) {
195 		for (pll_id = 0; pll_id < aio->chip->num_plls; pll_id++) {
196 			div_id = find_divider(aio, pll_id, freq);
197 			if (div_id >= 0) {
198 				aio->plldiv = div_id;
199 				break;
200 			}
201 		}
202 		if (pll_id == aio->chip->num_plls) {
203 			dev_err(dev, "Sysclk frequency is not supported(%d)\n",
204 				freq);
205 			return -EINVAL;
206 		}
207 	}
208 
209 	if (dir == SND_SOC_CLOCK_OUT)
210 		aio->pll_out = pll_id;
211 	else
212 		aio->pll_in = pll_id;
213 
214 	return 0;
215 }
216 
217 static int uniphier_aio_set_pll(struct snd_soc_dai *dai, int pll_id,
218 				int source, unsigned int freq_in,
219 				unsigned int freq_out)
220 {
221 	struct uniphier_aio *aio = uniphier_priv(dai);
222 	int ret;
223 
224 	if (!is_valid_pll(aio->chip, pll_id))
225 		return -EINVAL;
226 
227 	ret = aio_chip_set_pll(aio->chip, pll_id, freq_out);
228 	if (ret < 0)
229 		return ret;
230 
231 	return 0;
232 }
233 
234 static int uniphier_aio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
235 {
236 	struct uniphier_aio *aio = uniphier_priv(dai);
237 	struct device *dev = &aio->chip->pdev->dev;
238 
239 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
240 	case SND_SOC_DAIFMT_LEFT_J:
241 	case SND_SOC_DAIFMT_RIGHT_J:
242 	case SND_SOC_DAIFMT_I2S:
243 		aio->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
244 		break;
245 	default:
246 		dev_err(dev, "Format is not supported(%d)\n",
247 			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
248 		return -EINVAL;
249 	}
250 
251 	return 0;
252 }
253 
254 static int uniphier_aio_startup(struct snd_pcm_substream *substream,
255 				struct snd_soc_dai *dai)
256 {
257 	struct uniphier_aio *aio = uniphier_priv(dai);
258 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
259 
260 	sub->substream = substream;
261 	sub->pass_through = 0;
262 	sub->use_mmap = true;
263 
264 	return aio_init(sub);
265 }
266 
267 static void uniphier_aio_shutdown(struct snd_pcm_substream *substream,
268 				  struct snd_soc_dai *dai)
269 {
270 	struct uniphier_aio *aio = uniphier_priv(dai);
271 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
272 
273 	sub->substream = NULL;
274 }
275 
276 static int uniphier_aio_hw_params(struct snd_pcm_substream *substream,
277 				  struct snd_pcm_hw_params *params,
278 				  struct snd_soc_dai *dai)
279 {
280 	struct uniphier_aio *aio = uniphier_priv(dai);
281 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
282 	struct device *dev = &aio->chip->pdev->dev;
283 	int freq, ret;
284 
285 	switch (params_rate(params)) {
286 	case 48000:
287 	case 32000:
288 	case 24000:
289 		freq = 12288000;
290 		break;
291 	case 44100:
292 	case 22050:
293 		freq = 11289600;
294 		break;
295 	default:
296 		dev_err(dev, "Rate is not supported(%d)\n",
297 			params_rate(params));
298 		return -EINVAL;
299 	}
300 	ret = snd_soc_dai_set_sysclk(dai, AUD_CLK_A,
301 				     freq, SND_SOC_CLOCK_OUT);
302 	if (ret)
303 		return ret;
304 
305 	sub->params = *params;
306 	sub->setting = 1;
307 
308 	aio_port_reset(sub);
309 	aio_port_set_volume(sub, sub->vol);
310 	aio_src_reset(sub);
311 
312 	return 0;
313 }
314 
315 static int uniphier_aio_hw_free(struct snd_pcm_substream *substream,
316 				struct snd_soc_dai *dai)
317 {
318 	struct uniphier_aio *aio = uniphier_priv(dai);
319 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
320 
321 	sub->setting = 0;
322 
323 	return 0;
324 }
325 
326 static int uniphier_aio_prepare(struct snd_pcm_substream *substream,
327 				struct snd_soc_dai *dai)
328 {
329 	struct uniphier_aio *aio = uniphier_priv(dai);
330 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
331 	int ret;
332 
333 	ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
334 	if (ret)
335 		return ret;
336 	ret = aio_src_set_param(sub, &sub->params);
337 	if (ret)
338 		return ret;
339 	aio_port_set_enable(sub, 1);
340 
341 	ret = aio_if_set_param(sub, sub->pass_through);
342 	if (ret)
343 		return ret;
344 
345 	if (sub->swm->type == PORT_TYPE_CONV) {
346 		ret = aio_srcif_set_param(sub);
347 		if (ret)
348 			return ret;
349 		ret = aio_srcch_set_param(sub);
350 		if (ret)
351 			return ret;
352 		aio_srcch_set_enable(sub, 1);
353 	}
354 
355 	return 0;
356 }
357 
358 const struct snd_soc_dai_ops uniphier_aio_i2s_ops = {
359 	.set_sysclk  = uniphier_aio_set_sysclk,
360 	.set_pll     = uniphier_aio_set_pll,
361 	.set_fmt     = uniphier_aio_set_fmt,
362 	.startup     = uniphier_aio_startup,
363 	.shutdown    = uniphier_aio_shutdown,
364 	.hw_params   = uniphier_aio_hw_params,
365 	.hw_free     = uniphier_aio_hw_free,
366 	.prepare     = uniphier_aio_prepare,
367 };
368 EXPORT_SYMBOL_GPL(uniphier_aio_i2s_ops);
369 
370 const struct snd_soc_dai_ops uniphier_aio_spdif_ops = {
371 	.set_sysclk  = uniphier_aio_set_sysclk,
372 	.set_pll     = uniphier_aio_set_pll,
373 	.startup     = uniphier_aio_startup,
374 	.shutdown    = uniphier_aio_shutdown,
375 	.hw_params   = uniphier_aio_hw_params,
376 	.hw_free     = uniphier_aio_hw_free,
377 	.prepare     = uniphier_aio_prepare,
378 };
379 EXPORT_SYMBOL_GPL(uniphier_aio_spdif_ops);
380 
381 int uniphier_aio_dai_probe(struct snd_soc_dai *dai)
382 {
383 	struct uniphier_aio *aio = uniphier_priv(dai);
384 	int i;
385 
386 	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
387 		struct uniphier_aio_sub *sub = &aio->sub[i];
388 		const struct uniphier_aio_spec *spec;
389 
390 		spec = find_spec(aio, dai->name, i);
391 		if (!spec)
392 			continue;
393 
394 		sub->swm = &spec->swm;
395 		sub->spec = spec;
396 
397 		sub->vol = AUD_VOL_INIT;
398 	}
399 
400 	aio_iecout_set_enable(aio->chip, true);
401 	aio_chip_init(aio->chip);
402 	aio->chip->active = 1;
403 
404 	return 0;
405 }
406 EXPORT_SYMBOL_GPL(uniphier_aio_dai_probe);
407 
408 int uniphier_aio_dai_remove(struct snd_soc_dai *dai)
409 {
410 	struct uniphier_aio *aio = uniphier_priv(dai);
411 
412 	aio->chip->active = 0;
413 
414 	return 0;
415 }
416 EXPORT_SYMBOL_GPL(uniphier_aio_dai_remove);
417 
418 static void uniphier_aio_dai_suspend(struct snd_soc_dai *dai)
419 {
420 	struct uniphier_aio *aio = uniphier_priv(dai);
421 
422 	if (!snd_soc_dai_active(dai))
423 		return;
424 
425 	aio->chip->num_wup_aios--;
426 	if (!aio->chip->num_wup_aios) {
427 		reset_control_assert(aio->chip->rst);
428 		clk_disable_unprepare(aio->chip->clk);
429 	}
430 }
431 
432 static int uniphier_aio_suspend(struct snd_soc_component *component)
433 {
434 	struct snd_soc_dai *dai;
435 
436 	for_each_component_dais(component, dai)
437 		uniphier_aio_dai_suspend(dai);
438 	return 0;
439 }
440 
441 static int uniphier_aio_dai_resume(struct snd_soc_dai *dai)
442 {
443 	struct uniphier_aio *aio = uniphier_priv(dai);
444 	int ret, i;
445 
446 	if (!snd_soc_dai_active(dai))
447 		return 0;
448 
449 	if (!aio->chip->active)
450 		return 0;
451 
452 	if (!aio->chip->num_wup_aios) {
453 		ret = clk_prepare_enable(aio->chip->clk);
454 		if (ret)
455 			return ret;
456 
457 		ret = reset_control_deassert(aio->chip->rst);
458 		if (ret)
459 			goto err_out_clock;
460 	}
461 
462 	aio_iecout_set_enable(aio->chip, true);
463 	aio_chip_init(aio->chip);
464 
465 	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
466 		struct uniphier_aio_sub *sub = &aio->sub[i];
467 
468 		if (!sub->spec || !sub->substream)
469 			continue;
470 
471 		ret = aio_init(sub);
472 		if (ret)
473 			goto err_out_reset;
474 
475 		if (!sub->setting)
476 			continue;
477 
478 		aio_port_reset(sub);
479 		aio_src_reset(sub);
480 	}
481 	aio->chip->num_wup_aios++;
482 
483 	return 0;
484 
485 err_out_reset:
486 	if (!aio->chip->num_wup_aios)
487 		reset_control_assert(aio->chip->rst);
488 err_out_clock:
489 	if (!aio->chip->num_wup_aios)
490 		clk_disable_unprepare(aio->chip->clk);
491 
492 	return ret;
493 }
494 
495 static int uniphier_aio_resume(struct snd_soc_component *component)
496 {
497 	struct snd_soc_dai *dai;
498 	int ret = 0;
499 
500 	for_each_component_dais(component, dai)
501 		ret |= uniphier_aio_dai_resume(dai);
502 	return ret;
503 }
504 
505 static int uniphier_aio_vol_info(struct snd_kcontrol *kcontrol,
506 				 struct snd_ctl_elem_info *uinfo)
507 {
508 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
509 	uinfo->count = 1;
510 	uinfo->value.integer.min = 0;
511 	uinfo->value.integer.max = AUD_VOL_MAX;
512 
513 	return 0;
514 }
515 
516 static int uniphier_aio_vol_get(struct snd_kcontrol *kcontrol,
517 				struct snd_ctl_elem_value *ucontrol)
518 {
519 	struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol);
520 	struct uniphier_aio_chip *chip = snd_soc_component_get_drvdata(comp);
521 	struct uniphier_aio_sub *sub;
522 	int oport_hw = kcontrol->private_value;
523 
524 	sub = find_volume(chip, oport_hw);
525 	if (!sub)
526 		return 0;
527 
528 	ucontrol->value.integer.value[0] = sub->vol;
529 
530 	return 0;
531 }
532 
533 static int uniphier_aio_vol_put(struct snd_kcontrol *kcontrol,
534 				struct snd_ctl_elem_value *ucontrol)
535 {
536 	struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol);
537 	struct uniphier_aio_chip *chip = snd_soc_component_get_drvdata(comp);
538 	struct uniphier_aio_sub *sub;
539 	int oport_hw = kcontrol->private_value;
540 
541 	sub = find_volume(chip, oport_hw);
542 	if (!sub)
543 		return 0;
544 
545 	if (sub->vol == ucontrol->value.integer.value[0])
546 		return 0;
547 	sub->vol = ucontrol->value.integer.value[0];
548 
549 	aio_port_set_volume(sub, sub->vol);
550 
551 	return 0;
552 }
553 
554 static const struct snd_kcontrol_new uniphier_aio_controls[] = {
555 	{
556 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
557 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
558 		.name = "HPCMOUT1 Volume",
559 		.info = uniphier_aio_vol_info,
560 		.get = uniphier_aio_vol_get,
561 		.put = uniphier_aio_vol_put,
562 		.private_value = AUD_HW_HPCMOUT1,
563 	},
564 	{
565 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
566 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
567 		.name = "PCMOUT1 Volume",
568 		.info = uniphier_aio_vol_info,
569 		.get = uniphier_aio_vol_get,
570 		.put = uniphier_aio_vol_put,
571 		.private_value = AUD_HW_PCMOUT1,
572 	},
573 	{
574 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
575 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
576 		.name = "PCMOUT2 Volume",
577 		.info = uniphier_aio_vol_info,
578 		.get = uniphier_aio_vol_get,
579 		.put = uniphier_aio_vol_put,
580 		.private_value = AUD_HW_PCMOUT2,
581 	},
582 	{
583 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
584 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
585 		.name = "PCMOUT3 Volume",
586 		.info = uniphier_aio_vol_info,
587 		.get = uniphier_aio_vol_get,
588 		.put = uniphier_aio_vol_put,
589 		.private_value = AUD_HW_PCMOUT3,
590 	},
591 	{
592 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
593 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
594 		.name = "HIECOUT1 Volume",
595 		.info = uniphier_aio_vol_info,
596 		.get = uniphier_aio_vol_get,
597 		.put = uniphier_aio_vol_put,
598 		.private_value = AUD_HW_HIECOUT1,
599 	},
600 	{
601 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
602 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
603 		.name = "IECOUT1 Volume",
604 		.info = uniphier_aio_vol_info,
605 		.get = uniphier_aio_vol_get,
606 		.put = uniphier_aio_vol_put,
607 		.private_value = AUD_HW_IECOUT1,
608 	},
609 };
610 
611 static const struct snd_soc_component_driver uniphier_aio_component = {
612 	.name = "uniphier-aio",
613 	.controls = uniphier_aio_controls,
614 	.num_controls = ARRAY_SIZE(uniphier_aio_controls),
615 	.suspend = uniphier_aio_suspend,
616 	.resume  = uniphier_aio_resume,
617 };
618 
619 int uniphier_aio_probe(struct platform_device *pdev)
620 {
621 	struct uniphier_aio_chip *chip;
622 	struct device *dev = &pdev->dev;
623 	int ret, i, j;
624 
625 	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
626 	if (!chip)
627 		return -ENOMEM;
628 
629 	chip->chip_spec = of_device_get_match_data(dev);
630 	if (!chip->chip_spec)
631 		return -EINVAL;
632 
633 	chip->regmap_sg = syscon_regmap_lookup_by_phandle(dev->of_node,
634 							  "socionext,syscon");
635 	if (IS_ERR(chip->regmap_sg)) {
636 		if (PTR_ERR(chip->regmap_sg) == -EPROBE_DEFER)
637 			return -EPROBE_DEFER;
638 		chip->regmap_sg = NULL;
639 	}
640 
641 	chip->clk = devm_clk_get(dev, "aio");
642 	if (IS_ERR(chip->clk))
643 		return PTR_ERR(chip->clk);
644 
645 	chip->rst = devm_reset_control_get_shared(dev, "aio");
646 	if (IS_ERR(chip->rst))
647 		return PTR_ERR(chip->rst);
648 
649 	chip->num_aios = chip->chip_spec->num_dais;
650 	chip->num_wup_aios = chip->num_aios;
651 	chip->aios = devm_kcalloc(dev,
652 				  chip->num_aios, sizeof(struct uniphier_aio),
653 				  GFP_KERNEL);
654 	if (!chip->aios)
655 		return -ENOMEM;
656 
657 	chip->num_plls = chip->chip_spec->num_plls;
658 	chip->plls = devm_kcalloc(dev,
659 				  chip->num_plls,
660 				  sizeof(struct uniphier_aio_pll),
661 				  GFP_KERNEL);
662 	if (!chip->plls)
663 		return -ENOMEM;
664 	memcpy(chip->plls, chip->chip_spec->plls,
665 	       sizeof(struct uniphier_aio_pll) * chip->num_plls);
666 
667 	for (i = 0; i < chip->num_aios; i++) {
668 		struct uniphier_aio *aio = &chip->aios[i];
669 
670 		aio->chip = chip;
671 		aio->fmt = SND_SOC_DAIFMT_I2S;
672 
673 		for (j = 0; j < ARRAY_SIZE(aio->sub); j++) {
674 			struct uniphier_aio_sub *sub = &aio->sub[j];
675 
676 			sub->aio = aio;
677 			spin_lock_init(&sub->lock);
678 		}
679 	}
680 
681 	chip->pdev = pdev;
682 	platform_set_drvdata(pdev, chip);
683 
684 	ret = clk_prepare_enable(chip->clk);
685 	if (ret)
686 		return ret;
687 
688 	ret = reset_control_deassert(chip->rst);
689 	if (ret)
690 		goto err_out_clock;
691 
692 	ret = devm_snd_soc_register_component(dev, &uniphier_aio_component,
693 					      chip->chip_spec->dais,
694 					      chip->chip_spec->num_dais);
695 	if (ret) {
696 		dev_err(dev, "Register component failed.\n");
697 		goto err_out_reset;
698 	}
699 
700 	ret = uniphier_aiodma_soc_register_platform(pdev);
701 	if (ret) {
702 		dev_err(dev, "Register platform failed.\n");
703 		goto err_out_reset;
704 	}
705 
706 	return 0;
707 
708 err_out_reset:
709 	reset_control_assert(chip->rst);
710 
711 err_out_clock:
712 	clk_disable_unprepare(chip->clk);
713 
714 	return ret;
715 }
716 EXPORT_SYMBOL_GPL(uniphier_aio_probe);
717 
718 int uniphier_aio_remove(struct platform_device *pdev)
719 {
720 	struct uniphier_aio_chip *chip = platform_get_drvdata(pdev);
721 
722 	reset_control_assert(chip->rst);
723 	clk_disable_unprepare(chip->clk);
724 
725 	return 0;
726 }
727 EXPORT_SYMBOL_GPL(uniphier_aio_remove);
728 
729 MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>");
730 MODULE_DESCRIPTION("UniPhier AIO CPU DAI driver.");
731 MODULE_LICENSE("GPL v2");
732