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Linux/sound/soc/codecs/wm8741.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * wm8741.c  --  WM8741 ALSA SoC Audio driver
  4  *
  5  * Copyright 2010-1 Wolfson Microelectronics plc
  6  *
  7  * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
  8  */
  9 
 10 #include <linux/module.h>
 11 #include <linux/moduleparam.h>
 12 #include <linux/init.h>
 13 #include <linux/delay.h>
 14 #include <linux/pm.h>
 15 #include <linux/i2c.h>
 16 #include <linux/spi/spi.h>
 17 #include <linux/regmap.h>
 18 #include <linux/regulator/consumer.h>
 19 #include <linux/slab.h>
 20 #include <linux/of_device.h>
 21 #include <sound/core.h>
 22 #include <sound/pcm.h>
 23 #include <sound/pcm_params.h>
 24 #include <sound/soc.h>
 25 #include <sound/initval.h>
 26 #include <sound/tlv.h>
 27 
 28 #include "wm8741.h"
 29 
 30 #define WM8741_NUM_SUPPLIES 2
 31 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
 32         "AVDD",
 33         "DVDD",
 34 };
 35 
 36 /* codec private data */
 37 struct wm8741_priv {
 38         struct wm8741_platform_data pdata;
 39         struct regmap *regmap;
 40         struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
 41         unsigned int sysclk;
 42         const struct snd_pcm_hw_constraint_list *sysclk_constraints;
 43 };
 44 
 45 static const struct reg_default wm8741_reg_defaults[] = {
 46         {  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
 47         {  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
 48         {  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
 49         {  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
 50         {  4, 0x0000 },     /* R4  - Volume Control */
 51         {  5, 0x000A },     /* R5  - Format Control */
 52         {  6, 0x0000 },     /* R6  - Filter Control */
 53         {  7, 0x0000 },     /* R7  - Mode Control 1 */
 54         {  8, 0x0002 },     /* R8  - Mode Control 2 */
 55         { 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
 56 };
 57 
 58 static int wm8741_reset(struct snd_soc_component *component)
 59 {
 60         return snd_soc_component_write(component, WM8741_RESET, 0);
 61 }
 62 
 63 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
 64 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
 65 
 66 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
 67 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
 68                  WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
 69 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
 70                  WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
 71 };
 72 
 73 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
 74 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
 75                  1, 255, 1, dac_tlv_fine),
 76 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
 77                  0, 511, 1, dac_tlv),
 78 };
 79 
 80 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
 81 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
 82                 1, 255, 1, dac_tlv_fine),
 83 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
 84                 0, 511, 1, dac_tlv),
 85 };
 86 
 87 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
 88 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
 89 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
 90 SND_SOC_DAPM_OUTPUT("VOUTLP"),
 91 SND_SOC_DAPM_OUTPUT("VOUTLN"),
 92 SND_SOC_DAPM_OUTPUT("VOUTRP"),
 93 SND_SOC_DAPM_OUTPUT("VOUTRN"),
 94 };
 95 
 96 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
 97         { "VOUTLP", NULL, "DACL" },
 98         { "VOUTLN", NULL, "DACL" },
 99         { "VOUTRP", NULL, "DACR" },
100         { "VOUTRN", NULL, "DACR" },
101 };
102 
103 static const unsigned int rates_11289[] = {
104         44100, 88200,
105 };
106 
107 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
108         .count  = ARRAY_SIZE(rates_11289),
109         .list   = rates_11289,
110 };
111 
112 static const unsigned int rates_12288[] = {
113         32000, 48000, 96000,
114 };
115 
116 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
117         .count  = ARRAY_SIZE(rates_12288),
118         .list   = rates_12288,
119 };
120 
121 static const unsigned int rates_16384[] = {
122         32000,
123 };
124 
125 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
126         .count  = ARRAY_SIZE(rates_16384),
127         .list   = rates_16384,
128 };
129 
130 static const unsigned int rates_16934[] = {
131         44100, 88200,
132 };
133 
134 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
135         .count  = ARRAY_SIZE(rates_16934),
136         .list   = rates_16934,
137 };
138 
139 static const unsigned int rates_18432[] = {
140         48000, 96000,
141 };
142 
143 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
144         .count  = ARRAY_SIZE(rates_18432),
145         .list   = rates_18432,
146 };
147 
148 static const unsigned int rates_22579[] = {
149         44100, 88200, 176400
150 };
151 
152 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
153         .count  = ARRAY_SIZE(rates_22579),
154         .list   = rates_22579,
155 };
156 
157 static const unsigned int rates_24576[] = {
158         32000, 48000, 96000, 192000
159 };
160 
161 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
162         .count  = ARRAY_SIZE(rates_24576),
163         .list   = rates_24576,
164 };
165 
166 static const unsigned int rates_36864[] = {
167         48000, 96000, 192000
168 };
169 
170 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
171         .count  = ARRAY_SIZE(rates_36864),
172         .list   = rates_36864,
173 };
174 
175 static int wm8741_startup(struct snd_pcm_substream *substream,
176                           struct snd_soc_dai *dai)
177 {
178         struct snd_soc_component *component = dai->component;
179         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
180 
181         if (wm8741->sysclk)
182                 snd_pcm_hw_constraint_list(substream->runtime, 0,
183                                 SNDRV_PCM_HW_PARAM_RATE,
184                                 wm8741->sysclk_constraints);
185 
186         return 0;
187 }
188 
189 static int wm8741_hw_params(struct snd_pcm_substream *substream,
190                             struct snd_pcm_hw_params *params,
191                             struct snd_soc_dai *dai)
192 {
193         struct snd_soc_component *component = dai->component;
194         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
195         unsigned int iface, mode;
196         int i;
197 
198         /* The set of sample rates that can be supported depends on the
199          * MCLK supplied to the CODEC - enforce this.
200          */
201         if (!wm8741->sysclk) {
202                 dev_err(component->dev,
203                         "No MCLK configured, call set_sysclk() on init or in hw_params\n");
204                 return -EINVAL;
205         }
206 
207         /* Find a supported LRCLK rate */
208         for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
209                 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
210                         break;
211         }
212 
213         if (i == wm8741->sysclk_constraints->count) {
214                 dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
215                         params_rate(params), wm8741->sysclk);
216                 return -EINVAL;
217         }
218 
219         /* bit size */
220         switch (params_width(params)) {
221         case 16:
222                 iface = 0x0;
223                 break;
224         case 20:
225                 iface = 0x1;
226                 break;
227         case 24:
228                 iface = 0x2;
229                 break;
230         case 32:
231                 iface = 0x3;
232                 break;
233         default:
234                 dev_dbg(component->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
235                         params_width(params));
236                 return -EINVAL;
237         }
238 
239         /* oversampling rate */
240         if (params_rate(params) > 96000)
241                 mode = 0x40;
242         else if (params_rate(params) > 48000)
243                 mode = 0x20;
244         else
245                 mode = 0x00;
246 
247         dev_dbg(component->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
248                 params_width(params), params_rate(params));
249 
250         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
251                             iface);
252         snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
253                             mode);
254 
255         return 0;
256 }
257 
258 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
259                 int clk_id, unsigned int freq, int dir)
260 {
261         struct snd_soc_component *component = codec_dai->component;
262         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
263 
264         dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
265 
266         switch (freq) {
267         case 0:
268                 wm8741->sysclk_constraints = NULL;
269                 break;
270         case 11289600:
271                 wm8741->sysclk_constraints = &constraints_11289;
272                 break;
273         case 12288000:
274                 wm8741->sysclk_constraints = &constraints_12288;
275                 break;
276         case 16384000:
277                 wm8741->sysclk_constraints = &constraints_16384;
278                 break;
279         case 16934400:
280                 wm8741->sysclk_constraints = &constraints_16934;
281                 break;
282         case 18432000:
283                 wm8741->sysclk_constraints = &constraints_18432;
284                 break;
285         case 22579200:
286         case 33868800:
287                 wm8741->sysclk_constraints = &constraints_22579;
288                 break;
289         case 24576000:
290                 wm8741->sysclk_constraints = &constraints_24576;
291                 break;
292         case 36864000:
293                 wm8741->sysclk_constraints = &constraints_36864;
294                 break;
295         default:
296                 return -EINVAL;
297         }
298 
299         wm8741->sysclk = freq;
300         return 0;
301 }
302 
303 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
304                 unsigned int fmt)
305 {
306         struct snd_soc_component *component = codec_dai->component;
307         unsigned int iface;
308 
309         /* check master/slave audio interface */
310         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
311         case SND_SOC_DAIFMT_CBS_CFS:
312                 break;
313         default:
314                 return -EINVAL;
315         }
316 
317         /* interface format */
318         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
319         case SND_SOC_DAIFMT_I2S:
320                 iface = 0x08;
321                 break;
322         case SND_SOC_DAIFMT_RIGHT_J:
323                 iface = 0x00;
324                 break;
325         case SND_SOC_DAIFMT_LEFT_J:
326                 iface = 0x04;
327                 break;
328         case SND_SOC_DAIFMT_DSP_A:
329                 iface = 0x0C;
330                 break;
331         case SND_SOC_DAIFMT_DSP_B:
332                 iface = 0x1C;
333                 break;
334         default:
335                 return -EINVAL;
336         }
337 
338         /* clock inversion */
339         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
340         case SND_SOC_DAIFMT_NB_NF:
341                 break;
342         case SND_SOC_DAIFMT_NB_IF:
343                 iface |= 0x10;
344                 break;
345         case SND_SOC_DAIFMT_IB_NF:
346                 iface |= 0x20;
347                 break;
348         case SND_SOC_DAIFMT_IB_IF:
349                 iface |= 0x30;
350                 break;
351         default:
352                 return -EINVAL;
353         }
354 
355 
356         dev_dbg(component->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
357                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
358                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
359 
360         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
361                             WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
362                             iface);
363 
364         return 0;
365 }
366 
367 static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute)
368 {
369         struct snd_soc_component *component = codec_dai->component;
370 
371         snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
372                         WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
373         return 0;
374 }
375 
376 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
377                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
378                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
379                         SNDRV_PCM_RATE_192000)
380 
381 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
382                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
383 
384 static const struct snd_soc_dai_ops wm8741_dai_ops = {
385         .startup        = wm8741_startup,
386         .hw_params      = wm8741_hw_params,
387         .set_sysclk     = wm8741_set_dai_sysclk,
388         .set_fmt        = wm8741_set_dai_fmt,
389         .digital_mute   = wm8741_mute,
390 };
391 
392 static struct snd_soc_dai_driver wm8741_dai = {
393         .name = "wm8741",
394         .playback = {
395                 .stream_name = "Playback",
396                 .channels_min = 2,
397                 .channels_max = 2,
398                 .rates = WM8741_RATES,
399                 .formats = WM8741_FORMATS,
400         },
401         .ops = &wm8741_dai_ops,
402 };
403 
404 #ifdef CONFIG_PM
405 static int wm8741_resume(struct snd_soc_component *component)
406 {
407         snd_soc_component_cache_sync(component);
408         return 0;
409 }
410 #else
411 #define wm8741_resume NULL
412 #endif
413 
414 static int wm8741_configure(struct snd_soc_component *component)
415 {
416         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
417 
418         /* Configure differential mode */
419         switch (wm8741->pdata.diff_mode) {
420         case WM8741_DIFF_MODE_STEREO:
421         case WM8741_DIFF_MODE_STEREO_REVERSED:
422         case WM8741_DIFF_MODE_MONO_LEFT:
423         case WM8741_DIFF_MODE_MONO_RIGHT:
424                 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
425                                 WM8741_DIFF_MASK,
426                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
427                 break;
428         default:
429                 return -EINVAL;
430         }
431 
432         /* Change some default settings - latch VU */
433         snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
434                         WM8741_UPDATELL, WM8741_UPDATELL);
435         snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
436                         WM8741_UPDATELM, WM8741_UPDATELM);
437         snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
438                         WM8741_UPDATERL, WM8741_UPDATERL);
439         snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
440                         WM8741_UPDATERM, WM8741_UPDATERM);
441 
442         return 0;
443 }
444 
445 static int wm8741_add_controls(struct snd_soc_component *component)
446 {
447         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
448 
449         switch (wm8741->pdata.diff_mode) {
450         case WM8741_DIFF_MODE_STEREO:
451         case WM8741_DIFF_MODE_STEREO_REVERSED:
452                 snd_soc_add_component_controls(component,
453                                 wm8741_snd_controls_stereo,
454                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
455                 break;
456         case WM8741_DIFF_MODE_MONO_LEFT:
457                 snd_soc_add_component_controls(component,
458                                 wm8741_snd_controls_mono_left,
459                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
460                 break;
461         case WM8741_DIFF_MODE_MONO_RIGHT:
462                 snd_soc_add_component_controls(component,
463                                 wm8741_snd_controls_mono_right,
464                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
465                 break;
466         default:
467                 return -EINVAL;
468         }
469 
470         return 0;
471 }
472 
473 static int wm8741_probe(struct snd_soc_component *component)
474 {
475         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
476         int ret = 0;
477 
478         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
479                                     wm8741->supplies);
480         if (ret != 0) {
481                 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
482                 goto err_get;
483         }
484 
485         ret = wm8741_reset(component);
486         if (ret < 0) {
487                 dev_err(component->dev, "Failed to issue reset\n");
488                 goto err_enable;
489         }
490 
491         ret = wm8741_configure(component);
492         if (ret < 0) {
493                 dev_err(component->dev, "Failed to change default settings\n");
494                 goto err_enable;
495         }
496 
497         ret = wm8741_add_controls(component);
498         if (ret < 0) {
499                 dev_err(component->dev, "Failed to add controls\n");
500                 goto err_enable;
501         }
502 
503         dev_dbg(component->dev, "Successful registration\n");
504         return ret;
505 
506 err_enable:
507         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
508 err_get:
509         return ret;
510 }
511 
512 static void wm8741_remove(struct snd_soc_component *component)
513 {
514         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
515 
516         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
517 }
518 
519 static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
520         .probe                  = wm8741_probe,
521         .remove                 = wm8741_remove,
522         .resume                 = wm8741_resume,
523         .dapm_widgets           = wm8741_dapm_widgets,
524         .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
525         .dapm_routes            = wm8741_dapm_routes,
526         .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
527         .idle_bias_on           = 1,
528         .use_pmdown_time        = 1,
529         .endianness             = 1,
530         .non_legacy_dai_naming  = 1,
531 };
532 
533 static const struct of_device_id wm8741_of_match[] = {
534         { .compatible = "wlf,wm8741", },
535         { }
536 };
537 MODULE_DEVICE_TABLE(of, wm8741_of_match);
538 
539 static const struct regmap_config wm8741_regmap = {
540         .reg_bits = 7,
541         .val_bits = 9,
542         .max_register = WM8741_MAX_REGISTER,
543 
544         .reg_defaults = wm8741_reg_defaults,
545         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
546         .cache_type = REGCACHE_RBTREE,
547 };
548 
549 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
550 {
551         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
552         u32 diff_mode;
553 
554         if (dev->of_node) {
555                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
556                                 >= 0)
557                         wm8741->pdata.diff_mode = diff_mode;
558         } else {
559                 if (pdata != NULL)
560                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
561         }
562 
563         return 0;
564 }
565 
566 #if IS_ENABLED(CONFIG_I2C)
567 static int wm8741_i2c_probe(struct i2c_client *i2c,
568                             const struct i2c_device_id *id)
569 {
570         struct wm8741_priv *wm8741;
571         int ret, i;
572 
573         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
574                               GFP_KERNEL);
575         if (wm8741 == NULL)
576                 return -ENOMEM;
577 
578         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
579                 wm8741->supplies[i].supply = wm8741_supply_names[i];
580 
581         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
582                                       wm8741->supplies);
583         if (ret != 0) {
584                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
585                 return ret;
586         }
587 
588         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
589         if (IS_ERR(wm8741->regmap)) {
590                 ret = PTR_ERR(wm8741->regmap);
591                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
592                 return ret;
593         }
594 
595         ret = wm8741_set_pdata(&i2c->dev, wm8741);
596         if (ret != 0) {
597                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
598                 return ret;
599         }
600 
601         i2c_set_clientdata(i2c, wm8741);
602 
603         ret = devm_snd_soc_register_component(&i2c->dev,
604                                      &soc_component_dev_wm8741, &wm8741_dai, 1);
605 
606         return ret;
607 }
608 
609 static const struct i2c_device_id wm8741_i2c_id[] = {
610         { "wm8741", 0 },
611         { }
612 };
613 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
614 
615 static struct i2c_driver wm8741_i2c_driver = {
616         .driver = {
617                 .name = "wm8741",
618                 .of_match_table = wm8741_of_match,
619         },
620         .probe =    wm8741_i2c_probe,
621         .id_table = wm8741_i2c_id,
622 };
623 #endif
624 
625 #if defined(CONFIG_SPI_MASTER)
626 static int wm8741_spi_probe(struct spi_device *spi)
627 {
628         struct wm8741_priv *wm8741;
629         int ret, i;
630 
631         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
632                              GFP_KERNEL);
633         if (wm8741 == NULL)
634                 return -ENOMEM;
635 
636         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
637                 wm8741->supplies[i].supply = wm8741_supply_names[i];
638 
639         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
640                                       wm8741->supplies);
641         if (ret != 0) {
642                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
643                 return ret;
644         }
645 
646         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
647         if (IS_ERR(wm8741->regmap)) {
648                 ret = PTR_ERR(wm8741->regmap);
649                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
650                 return ret;
651         }
652 
653         ret = wm8741_set_pdata(&spi->dev, wm8741);
654         if (ret != 0) {
655                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
656                 return ret;
657         }
658 
659         spi_set_drvdata(spi, wm8741);
660 
661         ret = devm_snd_soc_register_component(&spi->dev,
662                         &soc_component_dev_wm8741, &wm8741_dai, 1);
663         return ret;
664 }
665 
666 static struct spi_driver wm8741_spi_driver = {
667         .driver = {
668                 .name   = "wm8741",
669                 .of_match_table = wm8741_of_match,
670         },
671         .probe          = wm8741_spi_probe,
672 };
673 #endif /* CONFIG_SPI_MASTER */
674 
675 static int __init wm8741_modinit(void)
676 {
677         int ret = 0;
678 
679 #if IS_ENABLED(CONFIG_I2C)
680         ret = i2c_add_driver(&wm8741_i2c_driver);
681         if (ret != 0)
682                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
683 #endif
684 #if defined(CONFIG_SPI_MASTER)
685         ret = spi_register_driver(&wm8741_spi_driver);
686         if (ret != 0) {
687                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
688                        ret);
689         }
690 #endif
691 
692         return ret;
693 }
694 module_init(wm8741_modinit);
695 
696 static void __exit wm8741_exit(void)
697 {
698 #if defined(CONFIG_SPI_MASTER)
699         spi_unregister_driver(&wm8741_spi_driver);
700 #endif
701 #if IS_ENABLED(CONFIG_I2C)
702         i2c_del_driver(&wm8741_i2c_driver);
703 #endif
704 }
705 module_exit(wm8741_exit);
706 
707 MODULE_DESCRIPTION("ASoC WM8741 driver");
708 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
709 MODULE_LICENSE("GPL");
710 

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