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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, int direction)
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         .mute_stream    = wm8741_mute,
390         .no_capture_mute = 1,
391 };
392 
393 static struct snd_soc_dai_driver wm8741_dai = {
394         .name = "wm8741",
395         .playback = {
396                 .stream_name = "Playback",
397                 .channels_min = 2,
398                 .channels_max = 2,
399                 .rates = WM8741_RATES,
400                 .formats = WM8741_FORMATS,
401         },
402         .ops = &wm8741_dai_ops,
403 };
404 
405 #ifdef CONFIG_PM
406 static int wm8741_resume(struct snd_soc_component *component)
407 {
408         snd_soc_component_cache_sync(component);
409         return 0;
410 }
411 #else
412 #define wm8741_resume NULL
413 #endif
414 
415 static int wm8741_configure(struct snd_soc_component *component)
416 {
417         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
418 
419         /* Configure differential mode */
420         switch (wm8741->pdata.diff_mode) {
421         case WM8741_DIFF_MODE_STEREO:
422         case WM8741_DIFF_MODE_STEREO_REVERSED:
423         case WM8741_DIFF_MODE_MONO_LEFT:
424         case WM8741_DIFF_MODE_MONO_RIGHT:
425                 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
426                                 WM8741_DIFF_MASK,
427                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
428                 break;
429         default:
430                 return -EINVAL;
431         }
432 
433         /* Change some default settings - latch VU */
434         snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
435                         WM8741_UPDATELL, WM8741_UPDATELL);
436         snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
437                         WM8741_UPDATELM, WM8741_UPDATELM);
438         snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
439                         WM8741_UPDATERL, WM8741_UPDATERL);
440         snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
441                         WM8741_UPDATERM, WM8741_UPDATERM);
442 
443         return 0;
444 }
445 
446 static int wm8741_add_controls(struct snd_soc_component *component)
447 {
448         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
449 
450         switch (wm8741->pdata.diff_mode) {
451         case WM8741_DIFF_MODE_STEREO:
452         case WM8741_DIFF_MODE_STEREO_REVERSED:
453                 snd_soc_add_component_controls(component,
454                                 wm8741_snd_controls_stereo,
455                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
456                 break;
457         case WM8741_DIFF_MODE_MONO_LEFT:
458                 snd_soc_add_component_controls(component,
459                                 wm8741_snd_controls_mono_left,
460                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
461                 break;
462         case WM8741_DIFF_MODE_MONO_RIGHT:
463                 snd_soc_add_component_controls(component,
464                                 wm8741_snd_controls_mono_right,
465                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
466                 break;
467         default:
468                 return -EINVAL;
469         }
470 
471         return 0;
472 }
473 
474 static int wm8741_probe(struct snd_soc_component *component)
475 {
476         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
477         int ret = 0;
478 
479         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
480                                     wm8741->supplies);
481         if (ret != 0) {
482                 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
483                 goto err_get;
484         }
485 
486         ret = wm8741_reset(component);
487         if (ret < 0) {
488                 dev_err(component->dev, "Failed to issue reset\n");
489                 goto err_enable;
490         }
491 
492         ret = wm8741_configure(component);
493         if (ret < 0) {
494                 dev_err(component->dev, "Failed to change default settings\n");
495                 goto err_enable;
496         }
497 
498         ret = wm8741_add_controls(component);
499         if (ret < 0) {
500                 dev_err(component->dev, "Failed to add controls\n");
501                 goto err_enable;
502         }
503 
504         dev_dbg(component->dev, "Successful registration\n");
505         return ret;
506 
507 err_enable:
508         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
509 err_get:
510         return ret;
511 }
512 
513 static void wm8741_remove(struct snd_soc_component *component)
514 {
515         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
516 
517         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
518 }
519 
520 static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
521         .probe                  = wm8741_probe,
522         .remove                 = wm8741_remove,
523         .resume                 = wm8741_resume,
524         .dapm_widgets           = wm8741_dapm_widgets,
525         .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
526         .dapm_routes            = wm8741_dapm_routes,
527         .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
528         .idle_bias_on           = 1,
529         .use_pmdown_time        = 1,
530         .endianness             = 1,
531         .non_legacy_dai_naming  = 1,
532 };
533 
534 static const struct of_device_id wm8741_of_match[] = {
535         { .compatible = "wlf,wm8741", },
536         { }
537 };
538 MODULE_DEVICE_TABLE(of, wm8741_of_match);
539 
540 static const struct regmap_config wm8741_regmap = {
541         .reg_bits = 7,
542         .val_bits = 9,
543         .max_register = WM8741_MAX_REGISTER,
544 
545         .reg_defaults = wm8741_reg_defaults,
546         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
547         .cache_type = REGCACHE_RBTREE,
548 };
549 
550 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
551 {
552         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
553         u32 diff_mode;
554 
555         if (dev->of_node) {
556                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
557                                 >= 0)
558                         wm8741->pdata.diff_mode = diff_mode;
559         } else {
560                 if (pdata != NULL)
561                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
562         }
563 
564         return 0;
565 }
566 
567 #if IS_ENABLED(CONFIG_I2C)
568 static int wm8741_i2c_probe(struct i2c_client *i2c,
569                             const struct i2c_device_id *id)
570 {
571         struct wm8741_priv *wm8741;
572         int ret, i;
573 
574         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
575                               GFP_KERNEL);
576         if (wm8741 == NULL)
577                 return -ENOMEM;
578 
579         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
580                 wm8741->supplies[i].supply = wm8741_supply_names[i];
581 
582         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
583                                       wm8741->supplies);
584         if (ret != 0) {
585                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
586                 return ret;
587         }
588 
589         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
590         if (IS_ERR(wm8741->regmap)) {
591                 ret = PTR_ERR(wm8741->regmap);
592                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
593                 return ret;
594         }
595 
596         ret = wm8741_set_pdata(&i2c->dev, wm8741);
597         if (ret != 0) {
598                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
599                 return ret;
600         }
601 
602         i2c_set_clientdata(i2c, wm8741);
603 
604         ret = devm_snd_soc_register_component(&i2c->dev,
605                                      &soc_component_dev_wm8741, &wm8741_dai, 1);
606 
607         return ret;
608 }
609 
610 static const struct i2c_device_id wm8741_i2c_id[] = {
611         { "wm8741", 0 },
612         { }
613 };
614 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
615 
616 static struct i2c_driver wm8741_i2c_driver = {
617         .driver = {
618                 .name = "wm8741",
619                 .of_match_table = wm8741_of_match,
620         },
621         .probe =    wm8741_i2c_probe,
622         .id_table = wm8741_i2c_id,
623 };
624 #endif
625 
626 #if defined(CONFIG_SPI_MASTER)
627 static int wm8741_spi_probe(struct spi_device *spi)
628 {
629         struct wm8741_priv *wm8741;
630         int ret, i;
631 
632         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
633                              GFP_KERNEL);
634         if (wm8741 == NULL)
635                 return -ENOMEM;
636 
637         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
638                 wm8741->supplies[i].supply = wm8741_supply_names[i];
639 
640         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
641                                       wm8741->supplies);
642         if (ret != 0) {
643                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
644                 return ret;
645         }
646 
647         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
648         if (IS_ERR(wm8741->regmap)) {
649                 ret = PTR_ERR(wm8741->regmap);
650                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
651                 return ret;
652         }
653 
654         ret = wm8741_set_pdata(&spi->dev, wm8741);
655         if (ret != 0) {
656                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
657                 return ret;
658         }
659 
660         spi_set_drvdata(spi, wm8741);
661 
662         ret = devm_snd_soc_register_component(&spi->dev,
663                         &soc_component_dev_wm8741, &wm8741_dai, 1);
664         return ret;
665 }
666 
667 static struct spi_driver wm8741_spi_driver = {
668         .driver = {
669                 .name   = "wm8741",
670                 .of_match_table = wm8741_of_match,
671         },
672         .probe          = wm8741_spi_probe,
673 };
674 #endif /* CONFIG_SPI_MASTER */
675 
676 static int __init wm8741_modinit(void)
677 {
678         int ret = 0;
679 
680 #if IS_ENABLED(CONFIG_I2C)
681         ret = i2c_add_driver(&wm8741_i2c_driver);
682         if (ret != 0)
683                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
684 #endif
685 #if defined(CONFIG_SPI_MASTER)
686         ret = spi_register_driver(&wm8741_spi_driver);
687         if (ret != 0) {
688                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
689                        ret);
690         }
691 #endif
692 
693         return ret;
694 }
695 module_init(wm8741_modinit);
696 
697 static void __exit wm8741_exit(void)
698 {
699 #if defined(CONFIG_SPI_MASTER)
700         spi_unregister_driver(&wm8741_spi_driver);
701 #endif
702 #if IS_ENABLED(CONFIG_I2C)
703         i2c_del_driver(&wm8741_i2c_driver);
704 #endif
705 }
706 module_exit(wm8741_exit);
707 
708 MODULE_DESCRIPTION("ASoC WM8741 driver");
709 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
710 MODULE_LICENSE("GPL");
711 

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