xref: /linux/sound/soc/codecs/ak4458.c (revision bfd5bb6f90af092aa345b15cd78143956a13c2a8)
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Audio driver for AK4458 DAC
4 //
5 // Copyright (C) 2016 Asahi Kasei Microdevices Corporation
6 // Copyright 2018 NXP
7 
8 #include <linux/delay.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/i2c.h>
11 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include <linux/of_gpio.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/slab.h>
16 #include <sound/initval.h>
17 #include <sound/pcm_params.h>
18 #include <sound/soc.h>
19 #include <sound/soc-dapm.h>
20 #include <sound/tlv.h>
21 
22 #include "ak4458.h"
23 
24 /* AK4458 Codec Private Data */
25 struct ak4458_priv {
26 	struct device *dev;
27 	struct regmap *regmap;
28 	struct gpio_desc *reset_gpiod;
29 	struct gpio_desc *mute_gpiod;
30 	int digfil;	/* SSLOW, SD, SLOW bits */
31 	int fs;		/* sampling rate */
32 	int fmt;
33 	int slots;
34 	int slot_width;
35 };
36 
37 static const struct reg_default ak4458_reg_defaults[] = {
38 	{ 0x00, 0x0C },	/*	0x00	AK4458_00_CONTROL1	*/
39 	{ 0x01, 0x22 },	/*	0x01	AK4458_01_CONTROL2	*/
40 	{ 0x02, 0x00 },	/*	0x02	AK4458_02_CONTROL3	*/
41 	{ 0x03, 0xFF },	/*	0x03	AK4458_03_LCHATT	*/
42 	{ 0x04, 0xFF },	/*	0x04	AK4458_04_RCHATT	*/
43 	{ 0x05, 0x00 },	/*	0x05	AK4458_05_CONTROL4	*/
44 	{ 0x06, 0x00 },	/*	0x06	AK4458_06_DSD1		*/
45 	{ 0x07, 0x03 },	/*	0x07	AK4458_07_CONTROL5	*/
46 	{ 0x08, 0x00 },	/*	0x08	AK4458_08_SOUND_CONTROL	*/
47 	{ 0x09, 0x00 },	/*	0x09	AK4458_09_DSD2		*/
48 	{ 0x0A, 0x0D },	/*	0x0A	AK4458_0A_CONTROL6	*/
49 	{ 0x0B, 0x0C },	/*	0x0B	AK4458_0B_CONTROL7	*/
50 	{ 0x0C, 0x00 },	/*	0x0C	AK4458_0C_CONTROL8	*/
51 	{ 0x0D, 0x00 },	/*	0x0D	AK4458_0D_CONTROL9	*/
52 	{ 0x0E, 0x50 },	/*	0x0E	AK4458_0E_CONTROL10	*/
53 	{ 0x0F, 0xFF },	/*	0x0F	AK4458_0F_L2CHATT	*/
54 	{ 0x10, 0xFF },	/*	0x10	AK4458_10_R2CHATT	*/
55 	{ 0x11, 0xFF },	/*	0x11	AK4458_11_L3CHATT	*/
56 	{ 0x12, 0xFF },	/*	0x12	AK4458_12_R3CHATT	*/
57 	{ 0x13, 0xFF },	/*	0x13	AK4458_13_L4CHATT	*/
58 	{ 0x14, 0xFF },	/*	0x14	AK4458_14_R4CHATT	*/
59 };
60 
61 /*
62  * Volume control:
63  * from -127 to 0 dB in 0.5 dB steps (mute instead of -127.5 dB)
64  */
65 static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
66 
67 /*
68  * DEM1 bit DEM0 bit Mode
69  * 0 0 44.1kHz
70  * 0 1 OFF (default)
71  * 1 0 48kHz
72  * 1 1 32kHz
73  */
74 static const char * const ak4458_dem_select_texts[] = {
75 	"44.1kHz", "OFF", "48kHz", "32kHz"
76 };
77 
78 /*
79  * SSLOW, SD, SLOW bits Digital Filter Setting
80  * 0, 0, 0 : Sharp Roll-Off Filter
81  * 0, 0, 1 : Slow Roll-Off Filter
82  * 0, 1, 0 : Short delay Sharp Roll-Off Filter
83  * 0, 1, 1 : Short delay Slow Roll-Off Filter
84  * 1, *, * : Super Slow Roll-Off Filter
85  */
86 static const char * const ak4458_digfil_select_texts[] = {
87 	"Sharp Roll-Off Filter",
88 	"Slow Roll-Off Filter",
89 	"Short delay Sharp Roll-Off Filter",
90 	"Short delay Slow Roll-Off Filter",
91 	"Super Slow Roll-Off Filter"
92 };
93 
94 /*
95  * DZFB: Inverting Enable of DZF
96  * 0: DZF goes H at Zero Detection
97  * 1: DZF goes L at Zero Detection
98  */
99 static const char * const ak4458_dzfb_select_texts[] = {"H", "L"};
100 
101 /*
102  * SC1-0 bits: Sound Mode Setting
103  * 0 0 : Sound Mode 0
104  * 0 1 : Sound Mode 1
105  * 1 0 : Sound Mode 2
106  * 1 1 : Reserved
107  */
108 static const char * const ak4458_sc_select_texts[] = {
109 	"Sound Mode 0", "Sound Mode 1", "Sound Mode 2"
110 };
111 
112 /* FIR2-0 bits: FIR Filter Mode Setting */
113 static const char * const ak4458_fir_select_texts[] = {
114 	"Mode 0", "Mode 1", "Mode 2", "Mode 3",
115 	"Mode 4", "Mode 5", "Mode 6", "Mode 7",
116 };
117 
118 /* ATS1-0 bits Attenuation Speed */
119 static const char * const ak4458_ats_select_texts[] = {
120 	"4080/fs", "2040/fs", "510/fs", "255/fs",
121 };
122 
123 /* DIF2 bit Audio Interface Format Setting(BICK fs) */
124 static const char * const ak4458_dif_select_texts[] = {"32fs,48fs", "64fs",};
125 
126 static const struct soc_enum ak4458_dac1_dem_enum =
127 	SOC_ENUM_SINGLE(AK4458_01_CONTROL2, 1,
128 			ARRAY_SIZE(ak4458_dem_select_texts),
129 			ak4458_dem_select_texts);
130 static const struct soc_enum ak4458_dac2_dem_enum =
131 	SOC_ENUM_SINGLE(AK4458_0A_CONTROL6, 0,
132 			ARRAY_SIZE(ak4458_dem_select_texts),
133 			ak4458_dem_select_texts);
134 static const struct soc_enum ak4458_dac3_dem_enum =
135 	SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 4,
136 			ARRAY_SIZE(ak4458_dem_select_texts),
137 			ak4458_dem_select_texts);
138 static const struct soc_enum ak4458_dac4_dem_enum =
139 	SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 6,
140 			ARRAY_SIZE(ak4458_dem_select_texts),
141 			ak4458_dem_select_texts);
142 static const struct soc_enum ak4458_digfil_enum =
143 	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(ak4458_digfil_select_texts),
144 			    ak4458_digfil_select_texts);
145 static const struct soc_enum ak4458_dzfb_enum =
146 	SOC_ENUM_SINGLE(AK4458_02_CONTROL3, 2,
147 			ARRAY_SIZE(ak4458_dzfb_select_texts),
148 			ak4458_dzfb_select_texts);
149 static const struct soc_enum ak4458_sm_enum =
150 	SOC_ENUM_SINGLE(AK4458_08_SOUND_CONTROL, 0,
151 			ARRAY_SIZE(ak4458_sc_select_texts),
152 			ak4458_sc_select_texts);
153 static const struct soc_enum ak4458_fir_enum =
154 	SOC_ENUM_SINGLE(AK4458_0C_CONTROL8, 0,
155 			ARRAY_SIZE(ak4458_fir_select_texts),
156 			ak4458_fir_select_texts);
157 static const struct soc_enum ak4458_ats_enum =
158 	SOC_ENUM_SINGLE(AK4458_0B_CONTROL7, 6,
159 			ARRAY_SIZE(ak4458_ats_select_texts),
160 			ak4458_ats_select_texts);
161 static const struct soc_enum ak4458_dif_enum =
162 	SOC_ENUM_SINGLE(AK4458_00_CONTROL1, 3,
163 			ARRAY_SIZE(ak4458_dif_select_texts),
164 			ak4458_dif_select_texts);
165 
166 static int get_digfil(struct snd_kcontrol *kcontrol,
167 		      struct snd_ctl_elem_value *ucontrol)
168 {
169 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
170 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
171 
172 	ucontrol->value.enumerated.item[0] = ak4458->digfil;
173 
174 	return 0;
175 }
176 
177 static int set_digfil(struct snd_kcontrol *kcontrol,
178 		      struct snd_ctl_elem_value *ucontrol)
179 {
180 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
181 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
182 	int num;
183 
184 	num = ucontrol->value.enumerated.item[0];
185 	if (num > 4)
186 		return -EINVAL;
187 
188 	ak4458->digfil = num;
189 
190 	/* write SD bit */
191 	snd_soc_component_update_bits(component, AK4458_01_CONTROL2,
192 			    AK4458_SD_MASK,
193 			    ((ak4458->digfil & 0x02) << 4));
194 
195 	/* write SLOW bit */
196 	snd_soc_component_update_bits(component, AK4458_02_CONTROL3,
197 			    AK4458_SLOW_MASK,
198 			    (ak4458->digfil & 0x01));
199 
200 	/* write SSLOW bit */
201 	snd_soc_component_update_bits(component, AK4458_05_CONTROL4,
202 			    AK4458_SSLOW_MASK,
203 			    ((ak4458->digfil & 0x04) >> 2));
204 
205 	return 0;
206 }
207 
208 static const struct snd_kcontrol_new ak4458_snd_controls[] = {
209 	SOC_DOUBLE_R_TLV("DAC1 Playback Volume", AK4458_03_LCHATT,
210 			 AK4458_04_RCHATT, 0, 0xFF, 0, dac_tlv),
211 	SOC_DOUBLE_R_TLV("DAC2 Playback Volume", AK4458_0F_L2CHATT,
212 			 AK4458_10_R2CHATT, 0, 0xFF, 0, dac_tlv),
213 	SOC_DOUBLE_R_TLV("DAC3 Playback Volume", AK4458_11_L3CHATT,
214 			 AK4458_12_R3CHATT, 0, 0xFF, 0, dac_tlv),
215 	SOC_DOUBLE_R_TLV("DAC4 Playback Volume", AK4458_13_L4CHATT,
216 			 AK4458_14_R4CHATT, 0, 0xFF, 0, dac_tlv),
217 	SOC_ENUM("AK4458 De-emphasis Response DAC1", ak4458_dac1_dem_enum),
218 	SOC_ENUM("AK4458 De-emphasis Response DAC2", ak4458_dac2_dem_enum),
219 	SOC_ENUM("AK4458 De-emphasis Response DAC3", ak4458_dac3_dem_enum),
220 	SOC_ENUM("AK4458 De-emphasis Response DAC4", ak4458_dac4_dem_enum),
221 	SOC_ENUM_EXT("AK4458 Digital Filter Setting", ak4458_digfil_enum,
222 		     get_digfil, set_digfil),
223 	SOC_ENUM("AK4458 Inverting Enable of DZFB", ak4458_dzfb_enum),
224 	SOC_ENUM("AK4458 Sound Mode", ak4458_sm_enum),
225 	SOC_ENUM("AK4458 FIR Filter Mode Setting", ak4458_fir_enum),
226 	SOC_ENUM("AK4458 Attenuation transition Time Setting",
227 		 ak4458_ats_enum),
228 	SOC_ENUM("AK4458 BICK fs Setting", ak4458_dif_enum),
229 };
230 
231 /* ak4458 dapm widgets */
232 static const struct snd_soc_dapm_widget ak4458_dapm_widgets[] = {
233 	SND_SOC_DAPM_DAC("AK4458 DAC1", NULL, AK4458_0A_CONTROL6, 2, 0),/*pw*/
234 	SND_SOC_DAPM_AIF_IN("AK4458 SDTI", "Playback", 0, SND_SOC_NOPM, 0, 0),
235 	SND_SOC_DAPM_OUTPUT("AK4458 AOUTA"),
236 
237 	SND_SOC_DAPM_DAC("AK4458 DAC2", NULL, AK4458_0A_CONTROL6, 3, 0),/*pw*/
238 	SND_SOC_DAPM_OUTPUT("AK4458 AOUTB"),
239 
240 	SND_SOC_DAPM_DAC("AK4458 DAC3", NULL, AK4458_0B_CONTROL7, 2, 0),/*pw*/
241 	SND_SOC_DAPM_OUTPUT("AK4458 AOUTC"),
242 
243 	SND_SOC_DAPM_DAC("AK4458 DAC4", NULL, AK4458_0B_CONTROL7, 3, 0),/*pw*/
244 	SND_SOC_DAPM_OUTPUT("AK4458 AOUTD"),
245 };
246 
247 static const struct snd_soc_dapm_route ak4458_intercon[] = {
248 	{"AK4458 DAC1",		NULL,	"AK4458 SDTI"},
249 	{"AK4458 AOUTA",	NULL,	"AK4458 DAC1"},
250 
251 	{"AK4458 DAC2",		NULL,	"AK4458 SDTI"},
252 	{"AK4458 AOUTB",	NULL,	"AK4458 DAC2"},
253 
254 	{"AK4458 DAC3",		NULL,	"AK4458 SDTI"},
255 	{"AK4458 AOUTC",	NULL,	"AK4458 DAC3"},
256 
257 	{"AK4458 DAC4",		NULL,	"AK4458 SDTI"},
258 	{"AK4458 AOUTD",	NULL,	"AK4458 DAC4"},
259 };
260 
261 static int ak4458_rstn_control(struct snd_soc_component *component, int bit)
262 {
263 	int ret;
264 
265 	if (bit)
266 		ret = snd_soc_component_update_bits(component,
267 					  AK4458_00_CONTROL1,
268 					  AK4458_RSTN_MASK,
269 					  0x1);
270 	else
271 		ret = snd_soc_component_update_bits(component,
272 					  AK4458_00_CONTROL1,
273 					  AK4458_RSTN_MASK,
274 					  0x0);
275 	return ret;
276 }
277 
278 static int ak4458_hw_params(struct snd_pcm_substream *substream,
279 			    struct snd_pcm_hw_params *params,
280 			    struct snd_soc_dai *dai)
281 {
282 	struct snd_soc_component *component = dai->component;
283 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
284 	int pcm_width = max(params_physical_width(params), ak4458->slot_width);
285 	int nfs1;
286 	u8 format;
287 
288 	nfs1 = params_rate(params);
289 	ak4458->fs = nfs1;
290 
291 	/* Master Clock Frequency Auto Setting Mode Enable */
292 	snd_soc_component_update_bits(component, AK4458_00_CONTROL1, 0x80, 0x80);
293 
294 	switch (pcm_width) {
295 	case 16:
296 		if (ak4458->fmt == SND_SOC_DAIFMT_I2S)
297 			format = AK4458_DIF_24BIT_I2S;
298 		else
299 			format = AK4458_DIF_16BIT_LSB;
300 		break;
301 	case 32:
302 		switch (ak4458->fmt) {
303 		case SND_SOC_DAIFMT_I2S:
304 			format = AK4458_DIF_32BIT_I2S;
305 			break;
306 		case SND_SOC_DAIFMT_LEFT_J:
307 			format = AK4458_DIF_32BIT_MSB;
308 			break;
309 		case SND_SOC_DAIFMT_RIGHT_J:
310 			format = AK4458_DIF_32BIT_LSB;
311 			break;
312 		case SND_SOC_DAIFMT_DSP_B:
313 			format = AK4458_DIF_32BIT_MSB;
314 			break;
315 		default:
316 			return -EINVAL;
317 		}
318 		break;
319 	default:
320 		return -EINVAL;
321 	}
322 
323 	snd_soc_component_update_bits(component, AK4458_00_CONTROL1,
324 			    AK4458_DIF_MASK, format);
325 
326 	ak4458_rstn_control(component, 0);
327 	ak4458_rstn_control(component, 1);
328 
329 	return 0;
330 }
331 
332 static int ak4458_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
333 {
334 	struct snd_soc_component *component = dai->component;
335 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
336 
337 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
338 	case SND_SOC_DAIFMT_CBS_CFS: /* Slave Mode */
339 		break;
340 	case SND_SOC_DAIFMT_CBM_CFM: /* Master Mode is not supported */
341 	case SND_SOC_DAIFMT_CBS_CFM:
342 	case SND_SOC_DAIFMT_CBM_CFS:
343 	default:
344 		dev_err(component->dev, "Master mode unsupported\n");
345 		return -EINVAL;
346 	}
347 
348 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
349 	case SND_SOC_DAIFMT_I2S:
350 	case SND_SOC_DAIFMT_LEFT_J:
351 	case SND_SOC_DAIFMT_RIGHT_J:
352 	case SND_SOC_DAIFMT_DSP_B:
353 		ak4458->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
354 		break;
355 	default:
356 		dev_err(component->dev, "Audio format 0x%02X unsupported\n",
357 			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
358 		return -EINVAL;
359 	}
360 
361 	ak4458_rstn_control(component, 0);
362 	ak4458_rstn_control(component, 1);
363 
364 	return 0;
365 }
366 
367 static const int att_speed[] = { 4080, 2040, 510, 255 };
368 
369 static int ak4458_set_dai_mute(struct snd_soc_dai *dai, int mute)
370 {
371 	struct snd_soc_component *component = dai->component;
372 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
373 	int nfs, ndt, ret, reg;
374 	int ats;
375 
376 	nfs = ak4458->fs;
377 
378 	reg = snd_soc_component_read32(component, AK4458_0B_CONTROL7);
379 	ats = (reg & AK4458_ATS_MASK) >> AK4458_ATS_SHIFT;
380 
381 	ndt = att_speed[ats] / (nfs / 1000);
382 
383 	if (mute) {
384 		ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2,  0x01, 1);
385 		mdelay(ndt);
386 		if (ak4458->mute_gpiod)
387 			gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
388 	} else {
389 		if (ak4458->mute_gpiod)
390 			gpiod_set_value_cansleep(ak4458->mute_gpiod, 0);
391 		ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 0x01, 0);
392 		mdelay(ndt);
393 	}
394 
395 	return 0;
396 }
397 
398 static int ak4458_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
399 			       unsigned int rx_mask, int slots, int slot_width)
400 {
401 	struct snd_soc_component *component = dai->component;
402 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
403 	int mode;
404 
405 	ak4458->slots = slots;
406 	ak4458->slot_width = slot_width;
407 
408 	switch (slots * slot_width) {
409 	case 128:
410 		mode = AK4458_MODE_TDM128;
411 		break;
412 	case 256:
413 		mode = AK4458_MODE_TDM256;
414 		break;
415 	case 512:
416 		mode = AK4458_MODE_TDM512;
417 		break;
418 	default:
419 		mode = AK4458_MODE_NORMAL;
420 		break;
421 	}
422 
423 	snd_soc_component_update_bits(component, AK4458_0A_CONTROL6,
424 			    AK4458_MODE_MASK,
425 			    mode);
426 
427 	return 0;
428 }
429 
430 #define AK4458_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE |\
431 			 SNDRV_PCM_FMTBIT_S24_LE |\
432 			 SNDRV_PCM_FMTBIT_S32_LE)
433 
434 static const unsigned int ak4458_rates[] = {
435 	8000, 11025,  16000, 22050,
436 	32000, 44100, 48000, 88200,
437 	96000, 176400, 192000, 352800,
438 	384000, 705600, 768000, 1411200,
439 	2822400,
440 };
441 
442 static const struct snd_pcm_hw_constraint_list ak4458_rate_constraints = {
443 	.count = ARRAY_SIZE(ak4458_rates),
444 	.list = ak4458_rates,
445 };
446 
447 static int ak4458_startup(struct snd_pcm_substream *substream,
448 			  struct snd_soc_dai *dai)
449 {
450 	int ret;
451 
452 	ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
453 					 SNDRV_PCM_HW_PARAM_RATE,
454 					 &ak4458_rate_constraints);
455 
456 	return ret;
457 }
458 
459 static struct snd_soc_dai_ops ak4458_dai_ops = {
460 	.startup        = ak4458_startup,
461 	.hw_params	= ak4458_hw_params,
462 	.set_fmt	= ak4458_set_dai_fmt,
463 	.digital_mute	= ak4458_set_dai_mute,
464 	.set_tdm_slot	= ak4458_set_tdm_slot,
465 };
466 
467 static struct snd_soc_dai_driver ak4458_dai = {
468 	.name = "ak4458-aif",
469 	.playback = {
470 		.stream_name = "Playback",
471 		.channels_min = 1,
472 		.channels_max = 8,
473 		.rates = SNDRV_PCM_RATE_KNOT,
474 		.formats = AK4458_FORMATS,
475 	},
476 	.ops = &ak4458_dai_ops,
477 };
478 
479 static void ak4458_power_off(struct ak4458_priv *ak4458)
480 {
481 	if (ak4458->reset_gpiod) {
482 		gpiod_set_value_cansleep(ak4458->reset_gpiod, 0);
483 		usleep_range(1000, 2000);
484 	}
485 }
486 
487 static void ak4458_power_on(struct ak4458_priv *ak4458)
488 {
489 	if (ak4458->reset_gpiod) {
490 		gpiod_set_value_cansleep(ak4458->reset_gpiod, 1);
491 		usleep_range(1000, 2000);
492 	}
493 }
494 
495 static void ak4458_init(struct snd_soc_component *component)
496 {
497 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
498 
499 	/* External Mute ON */
500 	if (ak4458->mute_gpiod)
501 		gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
502 
503 	ak4458_power_on(ak4458);
504 
505 	snd_soc_component_update_bits(component, AK4458_00_CONTROL1,
506 			    0x80, 0x80);   /* ACKS bit = 1; 10000000 */
507 
508 	ak4458_rstn_control(component, 1);
509 }
510 
511 static int ak4458_probe(struct snd_soc_component *component)
512 {
513 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
514 
515 	ak4458_init(component);
516 
517 	ak4458->fs = 48000;
518 
519 	return 0;
520 }
521 
522 static void ak4458_remove(struct snd_soc_component *component)
523 {
524 	struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
525 
526 	ak4458_power_off(ak4458);
527 }
528 
529 #ifdef CONFIG_PM
530 static int __maybe_unused ak4458_runtime_suspend(struct device *dev)
531 {
532 	struct ak4458_priv *ak4458 = dev_get_drvdata(dev);
533 
534 	regcache_cache_only(ak4458->regmap, true);
535 
536 	ak4458_power_off(ak4458);
537 
538 	if (ak4458->mute_gpiod)
539 		gpiod_set_value_cansleep(ak4458->mute_gpiod, 0);
540 
541 	return 0;
542 }
543 
544 static int __maybe_unused ak4458_runtime_resume(struct device *dev)
545 {
546 	struct ak4458_priv *ak4458 = dev_get_drvdata(dev);
547 
548 	if (ak4458->mute_gpiod)
549 		gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
550 
551 	ak4458_power_off(ak4458);
552 	ak4458_power_on(ak4458);
553 
554 	regcache_cache_only(ak4458->regmap, false);
555 	regcache_mark_dirty(ak4458->regmap);
556 
557 	return regcache_sync(ak4458->regmap);
558 }
559 #endif /* CONFIG_PM */
560 
561 struct snd_soc_component_driver soc_codec_dev_ak4458 = {
562 	.probe			= ak4458_probe,
563 	.remove			= ak4458_remove,
564 	.controls		= ak4458_snd_controls,
565 	.num_controls		= ARRAY_SIZE(ak4458_snd_controls),
566 	.dapm_widgets		= ak4458_dapm_widgets,
567 	.num_dapm_widgets	= ARRAY_SIZE(ak4458_dapm_widgets),
568 	.dapm_routes		= ak4458_intercon,
569 	.num_dapm_routes	= ARRAY_SIZE(ak4458_intercon),
570 	.idle_bias_on		= 1,
571 	.use_pmdown_time	= 1,
572 	.endianness		= 1,
573 	.non_legacy_dai_naming	= 1,
574 };
575 
576 static const struct regmap_config ak4458_regmap = {
577 	.reg_bits = 8,
578 	.val_bits = 8,
579 
580 	.max_register = AK4458_14_R4CHATT,
581 	.reg_defaults = ak4458_reg_defaults,
582 	.num_reg_defaults = ARRAY_SIZE(ak4458_reg_defaults),
583 	.cache_type = REGCACHE_RBTREE,
584 };
585 
586 static const struct dev_pm_ops ak4458_pm = {
587 	SET_RUNTIME_PM_OPS(ak4458_runtime_suspend, ak4458_runtime_resume, NULL)
588 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
589 				pm_runtime_force_resume)
590 };
591 
592 static int ak4458_i2c_probe(struct i2c_client *i2c)
593 {
594 	struct ak4458_priv *ak4458;
595 	int ret;
596 
597 	ak4458 = devm_kzalloc(&i2c->dev, sizeof(*ak4458), GFP_KERNEL);
598 	if (!ak4458)
599 		return -ENOMEM;
600 
601 	ak4458->regmap = devm_regmap_init_i2c(i2c, &ak4458_regmap);
602 	if (IS_ERR(ak4458->regmap))
603 		return PTR_ERR(ak4458->regmap);
604 
605 	i2c_set_clientdata(i2c, ak4458);
606 	ak4458->dev = &i2c->dev;
607 
608 	ak4458->reset_gpiod = devm_gpiod_get_optional(ak4458->dev, "reset",
609 						      GPIOD_OUT_LOW);
610 	if (IS_ERR(ak4458->reset_gpiod))
611 		return PTR_ERR(ak4458->reset_gpiod);
612 
613 	ak4458->mute_gpiod = devm_gpiod_get_optional(ak4458->dev, "mute",
614 						     GPIOD_OUT_LOW);
615 	if (IS_ERR(ak4458->mute_gpiod))
616 		return PTR_ERR(ak4458->mute_gpiod);
617 
618 	ret = devm_snd_soc_register_component(ak4458->dev, &soc_codec_dev_ak4458,
619 				     &ak4458_dai, 1);
620 	if (ret < 0) {
621 		dev_err(ak4458->dev, "Failed to register CODEC: %d\n", ret);
622 		return ret;
623 	}
624 
625 	pm_runtime_enable(&i2c->dev);
626 
627 	return 0;
628 }
629 
630 static int ak4458_i2c_remove(struct i2c_client *i2c)
631 {
632 	pm_runtime_disable(&i2c->dev);
633 
634 	return 0;
635 }
636 
637 static const struct of_device_id ak4458_of_match[] = {
638 	{ .compatible = "asahi-kasei,ak4458", },
639 	{ },
640 };
641 
642 static struct i2c_driver ak4458_i2c_driver = {
643 	.driver = {
644 		.name = "ak4458",
645 		.pm = &ak4458_pm,
646 		.of_match_table = ak4458_of_match,
647 		},
648 	.probe_new = ak4458_i2c_probe,
649 	.remove = ak4458_i2c_remove,
650 };
651 
652 module_i2c_driver(ak4458_i2c_driver);
653 
654 MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
655 MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
656 MODULE_DESCRIPTION("ASoC AK4458 DAC driver");
657 MODULE_LICENSE("GPL v2");
658