xref: /openbmc/linux/sound/soc/uniphier/aio-cpu.c (revision ba61bb17) 
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 	struct device *dev = &aio->chip->pdev->dev;
223 	int ret;
224 
225 	if (!is_valid_pll(aio->chip, pll_id))
226 		return -EINVAL;
227 	if (!aio->chip->plls[pll_id].enable) {
228 		dev_err(dev, "PLL(%d) is not implemented\n", pll_id);
229 		return -ENOTSUPP;
230 	}
231 
232 	ret = aio_chip_set_pll(aio->chip, pll_id, freq_out);
233 	if (ret < 0)
234 		return ret;
235 
236 	return 0;
237 }
238 
239 static int uniphier_aio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
240 {
241 	struct uniphier_aio *aio = uniphier_priv(dai);
242 	struct device *dev = &aio->chip->pdev->dev;
243 
244 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
245 	case SND_SOC_DAIFMT_LEFT_J:
246 	case SND_SOC_DAIFMT_RIGHT_J:
247 	case SND_SOC_DAIFMT_I2S:
248 		aio->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
249 		break;
250 	default:
251 		dev_err(dev, "Format is not supported(%d)\n",
252 			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
253 		return -EINVAL;
254 	}
255 
256 	return 0;
257 }
258 
259 static int uniphier_aio_startup(struct snd_pcm_substream *substream,
260 				struct snd_soc_dai *dai)
261 {
262 	struct uniphier_aio *aio = uniphier_priv(dai);
263 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
264 	int ret;
265 
266 	sub->substream = substream;
267 	sub->pass_through = 0;
268 	sub->use_mmap = true;
269 
270 	ret = aio_init(sub);
271 	if (ret)
272 		return ret;
273 
274 	return 0;
275 }
276 
277 static void uniphier_aio_shutdown(struct snd_pcm_substream *substream,
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 
283 	sub->substream = NULL;
284 }
285 
286 static int uniphier_aio_hw_params(struct snd_pcm_substream *substream,
287 				  struct snd_pcm_hw_params *params,
288 				  struct snd_soc_dai *dai)
289 {
290 	struct uniphier_aio *aio = uniphier_priv(dai);
291 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
292 	struct device *dev = &aio->chip->pdev->dev;
293 	int freq, ret;
294 
295 	switch (params_rate(params)) {
296 	case 48000:
297 	case 32000:
298 	case 24000:
299 		freq = 12288000;
300 		break;
301 	case 44100:
302 	case 22050:
303 		freq = 11289600;
304 		break;
305 	default:
306 		dev_err(dev, "Rate is not supported(%d)\n",
307 			params_rate(params));
308 		return -EINVAL;
309 	}
310 	ret = snd_soc_dai_set_sysclk(dai, AUD_CLK_A,
311 				     freq, SND_SOC_CLOCK_OUT);
312 	if (ret)
313 		return ret;
314 
315 	sub->params = *params;
316 	sub->setting = 1;
317 
318 	aio_port_reset(sub);
319 	aio_port_set_volume(sub, sub->vol);
320 	aio_src_reset(sub);
321 
322 	return 0;
323 }
324 
325 static int uniphier_aio_hw_free(struct snd_pcm_substream *substream,
326 				struct snd_soc_dai *dai)
327 {
328 	struct uniphier_aio *aio = uniphier_priv(dai);
329 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
330 
331 	sub->setting = 0;
332 
333 	return 0;
334 }
335 
336 static int uniphier_aio_prepare(struct snd_pcm_substream *substream,
337 				struct snd_soc_dai *dai)
338 {
339 	struct uniphier_aio *aio = uniphier_priv(dai);
340 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
341 	int ret;
342 
343 	ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
344 	if (ret)
345 		return ret;
346 	ret = aio_src_set_param(sub, &sub->params);
347 	if (ret)
348 		return ret;
349 	aio_port_set_enable(sub, 1);
350 
351 	ret = aio_if_set_param(sub, sub->pass_through);
352 	if (ret)
353 		return ret;
354 
355 	if (sub->swm->type == PORT_TYPE_CONV) {
356 		ret = aio_srcif_set_param(sub);
357 		if (ret)
358 			return ret;
359 		ret = aio_srcch_set_param(sub);
360 		if (ret)
361 			return ret;
362 		aio_srcch_set_enable(sub, 1);
363 	}
364 
365 	return 0;
366 }
367 
368 const struct snd_soc_dai_ops uniphier_aio_i2s_ops = {
369 	.set_sysclk  = uniphier_aio_set_sysclk,
370 	.set_pll     = uniphier_aio_set_pll,
371 	.set_fmt     = uniphier_aio_set_fmt,
372 	.startup     = uniphier_aio_startup,
373 	.shutdown    = uniphier_aio_shutdown,
374 	.hw_params   = uniphier_aio_hw_params,
375 	.hw_free     = uniphier_aio_hw_free,
376 	.prepare     = uniphier_aio_prepare,
377 };
378 EXPORT_SYMBOL_GPL(uniphier_aio_i2s_ops);
379 
380 const struct snd_soc_dai_ops uniphier_aio_spdif_ops = {
381 	.set_sysclk  = uniphier_aio_set_sysclk,
382 	.set_pll     = uniphier_aio_set_pll,
383 	.startup     = uniphier_aio_startup,
384 	.shutdown    = uniphier_aio_shutdown,
385 	.hw_params   = uniphier_aio_hw_params,
386 	.hw_free     = uniphier_aio_hw_free,
387 	.prepare     = uniphier_aio_prepare,
388 };
389 EXPORT_SYMBOL_GPL(uniphier_aio_spdif_ops);
390 
391 int uniphier_aio_dai_probe(struct snd_soc_dai *dai)
392 {
393 	struct uniphier_aio *aio = uniphier_priv(dai);
394 	int i;
395 
396 	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
397 		struct uniphier_aio_sub *sub = &aio->sub[i];
398 		const struct uniphier_aio_spec *spec;
399 
400 		spec = find_spec(aio, dai->name, i);
401 		if (!spec)
402 			continue;
403 
404 		sub->swm = &spec->swm;
405 		sub->spec = spec;
406 
407 		sub->vol = AUD_VOL_INIT;
408 	}
409 
410 	aio_iecout_set_enable(aio->chip, true);
411 	aio_chip_init(aio->chip);
412 	aio->chip->active = 1;
413 
414 	return 0;
415 }
416 EXPORT_SYMBOL_GPL(uniphier_aio_dai_probe);
417 
418 int uniphier_aio_dai_remove(struct snd_soc_dai *dai)
419 {
420 	struct uniphier_aio *aio = uniphier_priv(dai);
421 
422 	aio->chip->active = 0;
423 
424 	return 0;
425 }
426 EXPORT_SYMBOL_GPL(uniphier_aio_dai_remove);
427 
428 int uniphier_aio_dai_suspend(struct snd_soc_dai *dai)
429 {
430 	struct uniphier_aio *aio = uniphier_priv(dai);
431 
432 	reset_control_assert(aio->chip->rst);
433 	clk_disable_unprepare(aio->chip->clk);
434 
435 	return 0;
436 }
437 EXPORT_SYMBOL_GPL(uniphier_aio_dai_suspend);
438 
439 int uniphier_aio_dai_resume(struct snd_soc_dai *dai)
440 {
441 	struct uniphier_aio *aio = uniphier_priv(dai);
442 	int ret, i;
443 
444 	if (!aio->chip->active)
445 		return 0;
446 
447 	ret = clk_prepare_enable(aio->chip->clk);
448 	if (ret)
449 		return ret;
450 
451 	ret = reset_control_deassert(aio->chip->rst);
452 	if (ret)
453 		goto err_out_clock;
454 
455 	aio_iecout_set_enable(aio->chip, true);
456 	aio_chip_init(aio->chip);
457 
458 	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
459 		struct uniphier_aio_sub *sub = &aio->sub[i];
460 
461 		if (!sub->spec || !sub->substream)
462 			continue;
463 
464 		ret = aio_init(sub);
465 		if (ret)
466 			goto err_out_clock;
467 
468 		if (!sub->setting)
469 			continue;
470 
471 		aio_port_reset(sub);
472 		aio_src_reset(sub);
473 	}
474 
475 	return 0;
476 
477 err_out_clock:
478 	clk_disable_unprepare(aio->chip->clk);
479 
480 	return ret;
481 }
482 EXPORT_SYMBOL_GPL(uniphier_aio_dai_resume);
483 
484 static int uniphier_aio_vol_info(struct snd_kcontrol *kcontrol,
485 				 struct snd_ctl_elem_info *uinfo)
486 {
487 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
488 	uinfo->count = 1;
489 	uinfo->value.integer.min = 0;
490 	uinfo->value.integer.max = AUD_VOL_MAX;
491 
492 	return 0;
493 }
494 
495 static int uniphier_aio_vol_get(struct snd_kcontrol *kcontrol,
496 				struct snd_ctl_elem_value *ucontrol)
497 {
498 	struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol);
499 	struct uniphier_aio_chip *chip = snd_soc_component_get_drvdata(comp);
500 	struct uniphier_aio_sub *sub;
501 	int oport_hw = kcontrol->private_value;
502 
503 	sub = find_volume(chip, oport_hw);
504 	if (!sub)
505 		return 0;
506 
507 	ucontrol->value.integer.value[0] = sub->vol;
508 
509 	return 0;
510 }
511 
512 static int uniphier_aio_vol_put(struct snd_kcontrol *kcontrol,
513 				struct snd_ctl_elem_value *ucontrol)
514 {
515 	struct snd_soc_component *comp = snd_soc_kcontrol_component(kcontrol);
516 	struct uniphier_aio_chip *chip = snd_soc_component_get_drvdata(comp);
517 	struct uniphier_aio_sub *sub;
518 	int oport_hw = kcontrol->private_value;
519 
520 	sub = find_volume(chip, oport_hw);
521 	if (!sub)
522 		return 0;
523 
524 	if (sub->vol == ucontrol->value.integer.value[0])
525 		return 0;
526 	sub->vol = ucontrol->value.integer.value[0];
527 
528 	aio_port_set_volume(sub, sub->vol);
529 
530 	return 0;
531 }
532 
533 static const struct snd_kcontrol_new uniphier_aio_controls[] = {
534 	{
535 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
536 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
537 		.name = "HPCMOUT1 Volume",
538 		.info = uniphier_aio_vol_info,
539 		.get = uniphier_aio_vol_get,
540 		.put = uniphier_aio_vol_put,
541 		.private_value = AUD_HW_HPCMOUT1,
542 	},
543 	{
544 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
545 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
546 		.name = "PCMOUT1 Volume",
547 		.info = uniphier_aio_vol_info,
548 		.get = uniphier_aio_vol_get,
549 		.put = uniphier_aio_vol_put,
550 		.private_value = AUD_HW_PCMOUT1,
551 	},
552 	{
553 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
554 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
555 		.name = "PCMOUT2 Volume",
556 		.info = uniphier_aio_vol_info,
557 		.get = uniphier_aio_vol_get,
558 		.put = uniphier_aio_vol_put,
559 		.private_value = AUD_HW_PCMOUT2,
560 	},
561 	{
562 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
563 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
564 		.name = "PCMOUT3 Volume",
565 		.info = uniphier_aio_vol_info,
566 		.get = uniphier_aio_vol_get,
567 		.put = uniphier_aio_vol_put,
568 		.private_value = AUD_HW_PCMOUT3,
569 	},
570 	{
571 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
572 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
573 		.name = "HIECOUT1 Volume",
574 		.info = uniphier_aio_vol_info,
575 		.get = uniphier_aio_vol_get,
576 		.put = uniphier_aio_vol_put,
577 		.private_value = AUD_HW_HIECOUT1,
578 	},
579 	{
580 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
581 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
582 		.name = "IECOUT1 Volume",
583 		.info = uniphier_aio_vol_info,
584 		.get = uniphier_aio_vol_get,
585 		.put = uniphier_aio_vol_put,
586 		.private_value = AUD_HW_IECOUT1,
587 	},
588 };
589 
590 static const struct snd_soc_component_driver uniphier_aio_component = {
591 	.name = "uniphier-aio",
592 	.controls = uniphier_aio_controls,
593 	.num_controls = ARRAY_SIZE(uniphier_aio_controls),
594 };
595 
596 int uniphier_aio_probe(struct platform_device *pdev)
597 {
598 	struct uniphier_aio_chip *chip;
599 	struct device *dev = &pdev->dev;
600 	int ret, i, j;
601 
602 	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
603 	if (!chip)
604 		return -ENOMEM;
605 
606 	chip->chip_spec = of_device_get_match_data(dev);
607 	if (!chip->chip_spec)
608 		return -EINVAL;
609 
610 	chip->regmap_sg = syscon_regmap_lookup_by_phandle(dev->of_node,
611 							  "socionext,syscon");
612 	if (IS_ERR(chip->regmap_sg)) {
613 		if (PTR_ERR(chip->regmap_sg) == -EPROBE_DEFER)
614 			return -EPROBE_DEFER;
615 		chip->regmap_sg = NULL;
616 	}
617 
618 	chip->clk = devm_clk_get(dev, "aio");
619 	if (IS_ERR(chip->clk))
620 		return PTR_ERR(chip->clk);
621 
622 	chip->rst = devm_reset_control_get_shared(dev, "aio");
623 	if (IS_ERR(chip->rst))
624 		return PTR_ERR(chip->rst);
625 
626 	chip->num_aios = chip->chip_spec->num_dais;
627 	chip->aios = devm_kcalloc(dev,
628 				  chip->num_aios, sizeof(struct uniphier_aio),
629 				  GFP_KERNEL);
630 	if (!chip->aios)
631 		return -ENOMEM;
632 
633 	chip->num_plls = chip->chip_spec->num_plls;
634 	chip->plls = devm_kcalloc(dev,
635 				  chip->num_plls,
636 				  sizeof(struct uniphier_aio_pll),
637 				  GFP_KERNEL);
638 	if (!chip->plls)
639 		return -ENOMEM;
640 	memcpy(chip->plls, chip->chip_spec->plls,
641 	       sizeof(struct uniphier_aio_pll) * chip->num_plls);
642 
643 	for (i = 0; i < chip->num_aios; i++) {
644 		struct uniphier_aio *aio = &chip->aios[i];
645 
646 		aio->chip = chip;
647 		aio->fmt = SND_SOC_DAIFMT_I2S;
648 
649 		for (j = 0; j < ARRAY_SIZE(aio->sub); j++) {
650 			struct uniphier_aio_sub *sub = &aio->sub[j];
651 
652 			sub->aio = aio;
653 			spin_lock_init(&sub->lock);
654 		}
655 	}
656 
657 	chip->pdev = pdev;
658 	platform_set_drvdata(pdev, chip);
659 
660 	ret = clk_prepare_enable(chip->clk);
661 	if (ret)
662 		return ret;
663 
664 	ret = reset_control_deassert(chip->rst);
665 	if (ret)
666 		goto err_out_clock;
667 
668 	ret = devm_snd_soc_register_component(dev, &uniphier_aio_component,
669 					      chip->chip_spec->dais,
670 					      chip->chip_spec->num_dais);
671 	if (ret) {
672 		dev_err(dev, "Register component failed.\n");
673 		goto err_out_reset;
674 	}
675 
676 	ret = uniphier_aiodma_soc_register_platform(pdev);
677 	if (ret) {
678 		dev_err(dev, "Register platform failed.\n");
679 		goto err_out_reset;
680 	}
681 
682 	return 0;
683 
684 err_out_reset:
685 	reset_control_assert(chip->rst);
686 
687 err_out_clock:
688 	clk_disable_unprepare(chip->clk);
689 
690 	return ret;
691 }
692 EXPORT_SYMBOL_GPL(uniphier_aio_probe);
693 
694 int uniphier_aio_remove(struct platform_device *pdev)
695 {
696 	struct uniphier_aio_chip *chip = platform_get_drvdata(pdev);
697 
698 	reset_control_assert(chip->rst);
699 	clk_disable_unprepare(chip->clk);
700 
701 	return 0;
702 }
703 EXPORT_SYMBOL_GPL(uniphier_aio_remove);
704 
705 MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>");
706 MODULE_DESCRIPTION("UniPhier AIO CPU DAI driver.");
707 MODULE_LICENSE("GPL v2");
708