Merge branch 'akpm' (Andrew's patch-bomb)
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / mfd / wm8994-core.c
1 /*
2  * wm8994-core.c  --  Device access for Wolfson WM8994
3  *
4  * Copyright 2009 Wolfson Microelectronics PLC.
5  *
6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7  *
8  *  This program is free software; you can redistribute  it and/or modify it
9  *  under  the terms of  the GNU General  Public License as published by the
10  *  Free Software Foundation;  either version 2 of the  License, or (at your
11  *  option) any later version.
12  *
13  */
14
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/i2c.h>
19 #include <linux/err.h>
20 #include <linux/delay.h>
21 #include <linux/mfd/core.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/regmap.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/regulator/machine.h>
26
27 #include <linux/mfd/wm8994/core.h>
28 #include <linux/mfd/wm8994/pdata.h>
29 #include <linux/mfd/wm8994/registers.h>
30
31 #include "wm8994.h"
32
33 /**
34  * wm8994_reg_read: Read a single WM8994 register.
35  *
36  * @wm8994: Device to read from.
37  * @reg: Register to read.
38  */
39 int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
40 {
41         unsigned int val;
42         int ret;
43
44         ret = regmap_read(wm8994->regmap, reg, &val);
45
46         if (ret < 0)
47                 return ret;
48         else
49                 return val;
50 }
51 EXPORT_SYMBOL_GPL(wm8994_reg_read);
52
53 /**
54  * wm8994_bulk_read: Read multiple WM8994 registers
55  *
56  * @wm8994: Device to read from
57  * @reg: First register
58  * @count: Number of registers
59  * @buf: Buffer to fill.  The data will be returned big endian.
60  */
61 int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
62                      int count, u16 *buf)
63 {
64         return regmap_bulk_read(wm8994->regmap, reg, buf, count);
65 }
66
67 /**
68  * wm8994_reg_write: Write a single WM8994 register.
69  *
70  * @wm8994: Device to write to.
71  * @reg: Register to write to.
72  * @val: Value to write.
73  */
74 int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
75                      unsigned short val)
76 {
77         return regmap_write(wm8994->regmap, reg, val);
78 }
79 EXPORT_SYMBOL_GPL(wm8994_reg_write);
80
81 /**
82  * wm8994_bulk_write: Write multiple WM8994 registers
83  *
84  * @wm8994: Device to write to
85  * @reg: First register
86  * @count: Number of registers
87  * @buf: Buffer to write from.  Data must be big-endian formatted.
88  */
89 int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
90                       int count, const u16 *buf)
91 {
92         return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16));
93 }
94 EXPORT_SYMBOL_GPL(wm8994_bulk_write);
95
96 /**
97  * wm8994_set_bits: Set the value of a bitfield in a WM8994 register
98  *
99  * @wm8994: Device to write to.
100  * @reg: Register to write to.
101  * @mask: Mask of bits to set.
102  * @val: Value to set (unshifted)
103  */
104 int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
105                     unsigned short mask, unsigned short val)
106 {
107         return regmap_update_bits(wm8994->regmap, reg, mask, val);
108 }
109 EXPORT_SYMBOL_GPL(wm8994_set_bits);
110
111 static struct mfd_cell wm8994_regulator_devs[] = {
112         {
113                 .name = "wm8994-ldo",
114                 .id = 1,
115                 .pm_runtime_no_callbacks = true,
116         },
117         {
118                 .name = "wm8994-ldo",
119                 .id = 2,
120                 .pm_runtime_no_callbacks = true,
121         },
122 };
123
124 static struct resource wm8994_codec_resources[] = {
125         {
126                 .start = WM8994_IRQ_TEMP_SHUT,
127                 .end   = WM8994_IRQ_TEMP_WARN,
128                 .flags = IORESOURCE_IRQ,
129         },
130 };
131
132 static struct resource wm8994_gpio_resources[] = {
133         {
134                 .start = WM8994_IRQ_GPIO(1),
135                 .end   = WM8994_IRQ_GPIO(11),
136                 .flags = IORESOURCE_IRQ,
137         },
138 };
139
140 static struct mfd_cell wm8994_devs[] = {
141         {
142                 .name = "wm8994-codec",
143                 .num_resources = ARRAY_SIZE(wm8994_codec_resources),
144                 .resources = wm8994_codec_resources,
145         },
146
147         {
148                 .name = "wm8994-gpio",
149                 .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
150                 .resources = wm8994_gpio_resources,
151                 .pm_runtime_no_callbacks = true,
152         },
153 };
154
155 /*
156  * Supplies for the main bulk of CODEC; the LDO supplies are ignored
157  * and should be handled via the standard regulator API supply
158  * management.
159  */
160 static const char *wm1811_main_supplies[] = {
161         "DBVDD1",
162         "DBVDD2",
163         "DBVDD3",
164         "DCVDD",
165         "AVDD1",
166         "AVDD2",
167         "CPVDD",
168         "SPKVDD1",
169         "SPKVDD2",
170 };
171
172 static const char *wm8994_main_supplies[] = {
173         "DBVDD",
174         "DCVDD",
175         "AVDD1",
176         "AVDD2",
177         "CPVDD",
178         "SPKVDD1",
179         "SPKVDD2",
180 };
181
182 static const char *wm8958_main_supplies[] = {
183         "DBVDD1",
184         "DBVDD2",
185         "DBVDD3",
186         "DCVDD",
187         "AVDD1",
188         "AVDD2",
189         "CPVDD",
190         "SPKVDD1",
191         "SPKVDD2",
192 };
193
194 #ifdef CONFIG_PM
195 static int wm8994_suspend(struct device *dev)
196 {
197         struct wm8994 *wm8994 = dev_get_drvdata(dev);
198         int ret;
199
200         /* Don't actually go through with the suspend if the CODEC is
201          * still active (eg, for audio passthrough from CP. */
202         ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
203         if (ret < 0) {
204                 dev_err(dev, "Failed to read power status: %d\n", ret);
205         } else if (ret & WM8994_VMID_SEL_MASK) {
206                 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
207                 return 0;
208         }
209
210         ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4);
211         if (ret < 0) {
212                 dev_err(dev, "Failed to read power status: %d\n", ret);
213         } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA |
214                           WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA |
215                           WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) {
216                 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
217                 return 0;
218         }
219
220         ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5);
221         if (ret < 0) {
222                 dev_err(dev, "Failed to read power status: %d\n", ret);
223         } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA |
224                           WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA |
225                           WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) {
226                 dev_dbg(dev, "CODEC still active, ignoring suspend\n");
227                 return 0;
228         }
229
230         switch (wm8994->type) {
231         case WM8958:
232         case WM1811:
233                 ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
234                 if (ret < 0) {
235                         dev_err(dev, "Failed to read power status: %d\n", ret);
236                 } else if (ret & WM8958_MICD_ENA) {
237                         dev_dbg(dev, "CODEC still active, ignoring suspend\n");
238                         return 0;
239                 }
240                 break;
241         default:
242                 break;
243         }
244
245         switch (wm8994->type) {
246         case WM1811:
247                 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2);
248                 if (ret < 0) {
249                         dev_err(dev, "Failed to read jackdet: %d\n", ret);
250                 } else if (ret & WM1811_JACKDET_MODE_MASK) {
251                         dev_dbg(dev, "CODEC still active, ignoring suspend\n");
252                         return 0;
253                 }
254                 break;
255         default:
256                 break;
257         }
258
259         switch (wm8994->type) {
260         case WM1811:
261                 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2);
262                 if (ret < 0) {
263                         dev_err(dev, "Failed to read jackdet: %d\n", ret);
264                 } else if (ret & WM1811_JACKDET_MODE_MASK) {
265                         dev_dbg(dev, "CODEC still active, ignoring suspend\n");
266                         return 0;
267                 }
268                 break;
269         default:
270                 break;
271         }
272
273         /* Disable LDO pulldowns while the device is suspended if we
274          * don't know that something will be driving them. */
275         if (!wm8994->ldo_ena_always_driven)
276                 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
277                                 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
278                                 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
279
280         /* Explicitly put the device into reset in case regulators
281          * don't get disabled in order to ensure consistent restart.
282          */
283         wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
284                          wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
285
286         regcache_mark_dirty(wm8994->regmap);
287
288         /* Restore GPIO registers to prevent problems with mismatched
289          * pin configurations.
290          */
291         ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
292                                    WM8994_GPIO_11);
293         if (ret != 0)
294                 dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
295
296         /* In case one of the GPIOs is used as a wake input. */
297         ret = regcache_sync_region(wm8994->regmap,
298                                    WM8994_INTERRUPT_STATUS_1_MASK,
299                                    WM8994_INTERRUPT_STATUS_1_MASK);
300         if (ret != 0)
301                 dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
302
303         regcache_cache_only(wm8994->regmap, true);
304         wm8994->suspended = true;
305
306         ret = regulator_bulk_disable(wm8994->num_supplies,
307                                      wm8994->supplies);
308         if (ret != 0) {
309                 dev_err(dev, "Failed to disable supplies: %d\n", ret);
310                 return ret;
311         }
312
313         return 0;
314 }
315
316 static int wm8994_resume(struct device *dev)
317 {
318         struct wm8994 *wm8994 = dev_get_drvdata(dev);
319         int ret;
320
321         /* We may have lied to the PM core about suspending */
322         if (!wm8994->suspended)
323                 return 0;
324
325         ret = regulator_bulk_enable(wm8994->num_supplies,
326                                     wm8994->supplies);
327         if (ret != 0) {
328                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
329                 return ret;
330         }
331
332         regcache_cache_only(wm8994->regmap, false);
333         ret = regcache_sync(wm8994->regmap);
334         if (ret != 0) {
335                 dev_err(dev, "Failed to restore register map: %d\n", ret);
336                 goto err_enable;
337         }
338
339         /* Disable LDO pulldowns while the device is active */
340         wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
341                         WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
342                         0);
343
344         wm8994->suspended = false;
345
346         return 0;
347
348 err_enable:
349         regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
350
351         return ret;
352 }
353 #endif
354
355 #ifdef CONFIG_REGULATOR
356 static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
357 {
358         struct wm8994_ldo_pdata *ldo_pdata;
359
360         if (!pdata)
361                 return 0;
362
363         ldo_pdata = &pdata->ldo[ldo];
364
365         if (!ldo_pdata->init_data)
366                 return 0;
367
368         return ldo_pdata->init_data->num_consumer_supplies != 0;
369 }
370 #else
371 static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
372 {
373         return 0;
374 }
375 #endif
376
377 static const __devinitdata struct reg_default wm8994_revc_patch[] = {
378         { 0x102, 0x3 },
379         { 0x56, 0x3 },
380         { 0x817, 0x0 },
381         { 0x102, 0x0 },
382 };
383
384 static const __devinitdata struct reg_default wm8958_reva_patch[] = {
385         { 0x102, 0x3 },
386         { 0xcb, 0x81 },
387         { 0x817, 0x0 },
388         { 0x102, 0x0 },
389 };
390
391 static const __devinitdata struct reg_default wm1811_reva_patch[] = {
392         { 0x102, 0x3 },
393         { 0x56, 0x7 },
394         { 0x5d, 0x7e },
395         { 0x5e, 0x0 },
396         { 0x102, 0x0 },
397 };
398
399 /*
400  * Instantiate the generic non-control parts of the device.
401  */
402 static __devinit int wm8994_device_init(struct wm8994 *wm8994, int irq)
403 {
404         struct wm8994_pdata *pdata = wm8994->dev->platform_data;
405         struct regmap_config *regmap_config;
406         const struct reg_default *regmap_patch = NULL;
407         const char *devname;
408         int ret, i, patch_regs;
409         int pulls = 0;
410
411         dev_set_drvdata(wm8994->dev, wm8994);
412
413         /* Add the on-chip regulators first for bootstrapping */
414         ret = mfd_add_devices(wm8994->dev, -1,
415                               wm8994_regulator_devs,
416                               ARRAY_SIZE(wm8994_regulator_devs),
417                               NULL, 0);
418         if (ret != 0) {
419                 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
420                 goto err;
421         }
422
423         switch (wm8994->type) {
424         case WM1811:
425                 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
426                 break;
427         case WM8994:
428                 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
429                 break;
430         case WM8958:
431                 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
432                 break;
433         default:
434                 BUG();
435                 goto err;
436         }
437
438         wm8994->supplies = devm_kzalloc(wm8994->dev,
439                                         sizeof(struct regulator_bulk_data) *
440                                         wm8994->num_supplies, GFP_KERNEL);
441         if (!wm8994->supplies) {
442                 ret = -ENOMEM;
443                 goto err;
444         }
445
446         switch (wm8994->type) {
447         case WM1811:
448                 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
449                         wm8994->supplies[i].supply = wm1811_main_supplies[i];
450                 break;
451         case WM8994:
452                 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
453                         wm8994->supplies[i].supply = wm8994_main_supplies[i];
454                 break;
455         case WM8958:
456                 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
457                         wm8994->supplies[i].supply = wm8958_main_supplies[i];
458                 break;
459         default:
460                 BUG();
461                 goto err;
462         }
463                 
464         ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
465                                  wm8994->supplies);
466         if (ret != 0) {
467                 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
468                 goto err;
469         }
470
471         ret = regulator_bulk_enable(wm8994->num_supplies,
472                                     wm8994->supplies);
473         if (ret != 0) {
474                 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
475                 goto err_get;
476         }
477
478         ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
479         if (ret < 0) {
480                 dev_err(wm8994->dev, "Failed to read ID register\n");
481                 goto err_enable;
482         }
483         switch (ret) {
484         case 0x1811:
485                 devname = "WM1811";
486                 if (wm8994->type != WM1811)
487                         dev_warn(wm8994->dev, "Device registered as type %d\n",
488                                  wm8994->type);
489                 wm8994->type = WM1811;
490                 break;
491         case 0x8994:
492                 devname = "WM8994";
493                 if (wm8994->type != WM8994)
494                         dev_warn(wm8994->dev, "Device registered as type %d\n",
495                                  wm8994->type);
496                 wm8994->type = WM8994;
497                 break;
498         case 0x8958:
499                 devname = "WM8958";
500                 if (wm8994->type != WM8958)
501                         dev_warn(wm8994->dev, "Device registered as type %d\n",
502                                  wm8994->type);
503                 wm8994->type = WM8958;
504                 break;
505         default:
506                 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
507                         ret);
508                 ret = -EINVAL;
509                 goto err_enable;
510         }
511
512         ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
513         if (ret < 0) {
514                 dev_err(wm8994->dev, "Failed to read revision register: %d\n",
515                         ret);
516                 goto err_enable;
517         }
518         wm8994->revision = ret & WM8994_CHIP_REV_MASK;
519         wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
520
521         switch (wm8994->type) {
522         case WM8994:
523                 switch (wm8994->revision) {
524                 case 0:
525                 case 1:
526                         dev_warn(wm8994->dev,
527                                  "revision %c not fully supported\n",
528                                  'A' + wm8994->revision);
529                         break;
530                 case 2:
531                 case 3:
532                         regmap_patch = wm8994_revc_patch;
533                         patch_regs = ARRAY_SIZE(wm8994_revc_patch);
534                         break;
535                 default:
536                         break;
537                 }
538                 break;
539
540         case WM8958:
541                 switch (wm8994->revision) {
542                 case 0:
543                         regmap_patch = wm8958_reva_patch;
544                         patch_regs = ARRAY_SIZE(wm8958_reva_patch);
545                         break;
546                 default:
547                         break;
548                 }
549                 break;
550
551         case WM1811:
552                 /* Revision C did not change the relevant layer */
553                 if (wm8994->revision > 1)
554                         wm8994->revision++;
555                 switch (wm8994->revision) {
556                 case 0:
557                 case 1:
558                 case 2:
559                 case 3:
560                         regmap_patch = wm1811_reva_patch;
561                         patch_regs = ARRAY_SIZE(wm1811_reva_patch);
562                         break;
563                 default:
564                         break;
565                 }
566                 break;
567
568         default:
569                 break;
570         }
571
572         dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
573                  'A' + wm8994->revision, wm8994->cust_id);
574
575         switch (wm8994->type) {
576         case WM1811:
577                 regmap_config = &wm1811_regmap_config;
578                 break;
579         case WM8994:
580                 regmap_config = &wm8994_regmap_config;
581                 break;
582         case WM8958:
583                 regmap_config = &wm8958_regmap_config;
584                 break;
585         default:
586                 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
587                 return -EINVAL;
588         }
589
590         ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
591         if (ret != 0) {
592                 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
593                         ret);
594                 return ret;
595         }
596
597         if (regmap_patch) {
598                 ret = regmap_register_patch(wm8994->regmap, regmap_patch,
599                                             patch_regs);
600                 if (ret != 0) {
601                         dev_err(wm8994->dev, "Failed to register patch: %d\n",
602                                 ret);
603                         goto err;
604                 }
605         }
606
607         if (pdata) {
608                 wm8994->irq_base = pdata->irq_base;
609                 wm8994->gpio_base = pdata->gpio_base;
610
611                 /* GPIO configuration is only applied if it's non-zero */
612                 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
613                         if (pdata->gpio_defaults[i]) {
614                                 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
615                                                 0xffff,
616                                                 pdata->gpio_defaults[i]);
617                         }
618                 }
619
620                 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
621
622                 if (pdata->spkmode_pu)
623                         pulls |= WM8994_SPKMODE_PU;
624         }
625
626         /* Disable unneeded pulls */
627         wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
628                         WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
629                         WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
630                         pulls);
631
632         /* In some system designs where the regulators are not in use,
633          * we can achieve a small reduction in leakage currents by
634          * floating LDO outputs.  This bit makes no difference if the
635          * LDOs are enabled, it only affects cases where the LDOs were
636          * in operation and are then disabled.
637          */
638         for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
639                 if (wm8994_ldo_in_use(pdata, i))
640                         wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
641                                         WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
642                 else
643                         wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
644                                         WM8994_LDO1_DISCH, 0);
645         }
646
647         wm8994_irq_init(wm8994);
648
649         ret = mfd_add_devices(wm8994->dev, -1,
650                               wm8994_devs, ARRAY_SIZE(wm8994_devs),
651                               NULL, 0);
652         if (ret != 0) {
653                 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
654                 goto err_irq;
655         }
656
657         pm_runtime_enable(wm8994->dev);
658         pm_runtime_idle(wm8994->dev);
659
660         return 0;
661
662 err_irq:
663         wm8994_irq_exit(wm8994);
664 err_enable:
665         regulator_bulk_disable(wm8994->num_supplies,
666                                wm8994->supplies);
667 err_get:
668         regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
669 err:
670         mfd_remove_devices(wm8994->dev);
671         return ret;
672 }
673
674 static __devexit void wm8994_device_exit(struct wm8994 *wm8994)
675 {
676         pm_runtime_disable(wm8994->dev);
677         mfd_remove_devices(wm8994->dev);
678         wm8994_irq_exit(wm8994);
679         regulator_bulk_disable(wm8994->num_supplies,
680                                wm8994->supplies);
681         regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
682 }
683
684 static const struct of_device_id wm8994_of_match[] = {
685         { .compatible = "wlf,wm1811", },
686         { .compatible = "wlf,wm8994", },
687         { .compatible = "wlf,wm8958", },
688         { }
689 };
690 MODULE_DEVICE_TABLE(of, wm8994_of_match);
691
692 static __devinit int wm8994_i2c_probe(struct i2c_client *i2c,
693                                       const struct i2c_device_id *id)
694 {
695         struct wm8994 *wm8994;
696         int ret;
697
698         wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
699         if (wm8994 == NULL)
700                 return -ENOMEM;
701
702         i2c_set_clientdata(i2c, wm8994);
703         wm8994->dev = &i2c->dev;
704         wm8994->irq = i2c->irq;
705         wm8994->type = id->driver_data;
706
707         wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
708         if (IS_ERR(wm8994->regmap)) {
709                 ret = PTR_ERR(wm8994->regmap);
710                 dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
711                         ret);
712                 return ret;
713         }
714
715         return wm8994_device_init(wm8994, i2c->irq);
716 }
717
718 static __devexit int wm8994_i2c_remove(struct i2c_client *i2c)
719 {
720         struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
721
722         wm8994_device_exit(wm8994);
723
724         return 0;
725 }
726
727 static const struct i2c_device_id wm8994_i2c_id[] = {
728         { "wm1811", WM1811 },
729         { "wm1811a", WM1811 },
730         { "wm8994", WM8994 },
731         { "wm8958", WM8958 },
732         { }
733 };
734 MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
735
736 static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
737                             NULL);
738
739 static struct i2c_driver wm8994_i2c_driver = {
740         .driver = {
741                 .name = "wm8994",
742                 .owner = THIS_MODULE,
743                 .pm = &wm8994_pm_ops,
744                 .of_match_table = wm8994_of_match,
745         },
746         .probe = wm8994_i2c_probe,
747         .remove = __devexit_p(wm8994_i2c_remove),
748         .id_table = wm8994_i2c_id,
749 };
750
751 module_i2c_driver(wm8994_i2c_driver);
752
753 MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
754 MODULE_LICENSE("GPL");
755 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");