wm8994-core.c revision 4dd0b2ba1d8c96d18c4a5624b167e267671d047f 
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/of.h>
23#include <linux/of_device.h>
24#include <linux/of_gpio.h>
25#include <linux/pm_runtime.h>
26#include <linux/regmap.h>
27#include <linux/regulator/consumer.h>
28#include <linux/regulator/machine.h>
29
30#include <linux/mfd/wm8994/core.h>
31#include <linux/mfd/wm8994/pdata.h>
32#include <linux/mfd/wm8994/registers.h>
33
34#include "wm8994.h"
35
36/**
37 * wm8994_reg_read: Read a single WM8994 register.
38 *
39 * @wm8994: Device to read from.
40 * @reg: Register to read.
41 */
42int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
43{
44	unsigned int val;
45	int ret;
46
47	ret = regmap_read(wm8994->regmap, reg, &val);
48
49	if (ret < 0)
50		return ret;
51	else
52		return val;
53}
54EXPORT_SYMBOL_GPL(wm8994_reg_read);
55
56/**
57 * wm8994_bulk_read: Read multiple WM8994 registers
58 *
59 * @wm8994: Device to read from
60 * @reg: First register
61 * @count: Number of registers
62 * @buf: Buffer to fill.  The data will be returned big endian.
63 */
64int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
65		     int count, u16 *buf)
66{
67	return regmap_bulk_read(wm8994->regmap, reg, buf, count);
68}
69
70/**
71 * wm8994_reg_write: Write a single WM8994 register.
72 *
73 * @wm8994: Device to write to.
74 * @reg: Register to write to.
75 * @val: Value to write.
76 */
77int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
78		     unsigned short val)
79{
80	return regmap_write(wm8994->regmap, reg, val);
81}
82EXPORT_SYMBOL_GPL(wm8994_reg_write);
83
84/**
85 * wm8994_bulk_write: Write multiple WM8994 registers
86 *
87 * @wm8994: Device to write to
88 * @reg: First register
89 * @count: Number of registers
90 * @buf: Buffer to write from.  Data must be big-endian formatted.
91 */
92int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
93		      int count, const u16 *buf)
94{
95	return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16));
96}
97EXPORT_SYMBOL_GPL(wm8994_bulk_write);
98
99/**
100 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register
101 *
102 * @wm8994: Device to write to.
103 * @reg: Register to write to.
104 * @mask: Mask of bits to set.
105 * @val: Value to set (unshifted)
106 */
107int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
108		    unsigned short mask, unsigned short val)
109{
110	return regmap_update_bits(wm8994->regmap, reg, mask, val);
111}
112EXPORT_SYMBOL_GPL(wm8994_set_bits);
113
114static struct mfd_cell wm8994_regulator_devs[] = {
115	{
116		.name = "wm8994-ldo",
117		.id = 1,
118		.pm_runtime_no_callbacks = true,
119	},
120	{
121		.name = "wm8994-ldo",
122		.id = 2,
123		.pm_runtime_no_callbacks = true,
124	},
125};
126
127static struct resource wm8994_codec_resources[] = {
128	{
129		.start = WM8994_IRQ_TEMP_SHUT,
130		.end   = WM8994_IRQ_TEMP_WARN,
131		.flags = IORESOURCE_IRQ,
132	},
133};
134
135static struct resource wm8994_gpio_resources[] = {
136	{
137		.start = WM8994_IRQ_GPIO(1),
138		.end   = WM8994_IRQ_GPIO(11),
139		.flags = IORESOURCE_IRQ,
140	},
141};
142
143static struct mfd_cell wm8994_devs[] = {
144	{
145		.name = "wm8994-codec",
146		.num_resources = ARRAY_SIZE(wm8994_codec_resources),
147		.resources = wm8994_codec_resources,
148	},
149
150	{
151		.name = "wm8994-gpio",
152		.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
153		.resources = wm8994_gpio_resources,
154		.pm_runtime_no_callbacks = true,
155	},
156};
157
158/*
159 * Supplies for the main bulk of CODEC; the LDO supplies are ignored
160 * and should be handled via the standard regulator API supply
161 * management.
162 */
163static const char *wm1811_main_supplies[] = {
164	"DBVDD1",
165	"DBVDD2",
166	"DBVDD3",
167	"DCVDD",
168	"AVDD1",
169	"AVDD2",
170	"CPVDD",
171	"SPKVDD1",
172	"SPKVDD2",
173};
174
175static const char *wm8994_main_supplies[] = {
176	"DBVDD",
177	"DCVDD",
178	"AVDD1",
179	"AVDD2",
180	"CPVDD",
181	"SPKVDD1",
182	"SPKVDD2",
183};
184
185static const char *wm8958_main_supplies[] = {
186	"DBVDD1",
187	"DBVDD2",
188	"DBVDD3",
189	"DCVDD",
190	"AVDD1",
191	"AVDD2",
192	"CPVDD",
193	"SPKVDD1",
194	"SPKVDD2",
195};
196
197#ifdef CONFIG_PM_RUNTIME
198static int wm8994_suspend(struct device *dev)
199{
200	struct wm8994 *wm8994 = dev_get_drvdata(dev);
201	int ret;
202
203	/* Don't actually go through with the suspend if the CODEC is
204	 * still active (eg, for audio passthrough from CP. */
205	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
206	if (ret < 0) {
207		dev_err(dev, "Failed to read power status: %d\n", ret);
208	} else if (ret & WM8994_VMID_SEL_MASK) {
209		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
210		return 0;
211	}
212
213	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4);
214	if (ret < 0) {
215		dev_err(dev, "Failed to read power status: %d\n", ret);
216	} else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA |
217			  WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA |
218			  WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) {
219		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
220		return 0;
221	}
222
223	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5);
224	if (ret < 0) {
225		dev_err(dev, "Failed to read power status: %d\n", ret);
226	} else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA |
227			  WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA |
228			  WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) {
229		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
230		return 0;
231	}
232
233	switch (wm8994->type) {
234	case WM8958:
235	case WM1811:
236		ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
237		if (ret < 0) {
238			dev_err(dev, "Failed to read power status: %d\n", ret);
239		} else if (ret & WM8958_MICD_ENA) {
240			dev_dbg(dev, "CODEC still active, ignoring suspend\n");
241			return 0;
242		}
243		break;
244	default:
245		break;
246	}
247
248	/* Disable LDO pulldowns while the device is suspended if we
249	 * don't know that something will be driving them. */
250	if (!wm8994->ldo_ena_always_driven)
251		wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
252				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
253				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
254
255	/* Explicitly put the device into reset in case regulators
256	 * don't get disabled in order to ensure consistent restart.
257	 */
258	wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
259			 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
260
261	regcache_mark_dirty(wm8994->regmap);
262
263	/* Restore GPIO registers to prevent problems with mismatched
264	 * pin configurations.
265	 */
266	ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
267				   WM8994_GPIO_11);
268	if (ret != 0)
269		dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
270
271	/* In case one of the GPIOs is used as a wake input. */
272	ret = regcache_sync_region(wm8994->regmap,
273				   WM8994_INTERRUPT_STATUS_1_MASK,
274				   WM8994_INTERRUPT_STATUS_1_MASK);
275	if (ret != 0)
276		dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
277
278	regcache_cache_only(wm8994->regmap, true);
279	wm8994->suspended = true;
280
281	ret = regulator_bulk_disable(wm8994->num_supplies,
282				     wm8994->supplies);
283	if (ret != 0) {
284		dev_err(dev, "Failed to disable supplies: %d\n", ret);
285		return ret;
286	}
287
288	return 0;
289}
290
291static int wm8994_resume(struct device *dev)
292{
293	struct wm8994 *wm8994 = dev_get_drvdata(dev);
294	int ret;
295
296	/* We may have lied to the PM core about suspending */
297	if (!wm8994->suspended)
298		return 0;
299
300	ret = regulator_bulk_enable(wm8994->num_supplies,
301				    wm8994->supplies);
302	if (ret != 0) {
303		dev_err(dev, "Failed to enable supplies: %d\n", ret);
304		return ret;
305	}
306
307	regcache_cache_only(wm8994->regmap, false);
308	ret = regcache_sync(wm8994->regmap);
309	if (ret != 0) {
310		dev_err(dev, "Failed to restore register map: %d\n", ret);
311		goto err_enable;
312	}
313
314	/* Disable LDO pulldowns while the device is active */
315	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
316			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
317			0);
318
319	wm8994->suspended = false;
320
321	return 0;
322
323err_enable:
324	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
325
326	return ret;
327}
328#endif
329
330#ifdef CONFIG_REGULATOR
331static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
332{
333	struct wm8994_ldo_pdata *ldo_pdata;
334
335	if (!pdata)
336		return 0;
337
338	ldo_pdata = &pdata->ldo[ldo];
339
340	if (!ldo_pdata->init_data)
341		return 0;
342
343	return ldo_pdata->init_data->num_consumer_supplies != 0;
344}
345#else
346static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
347{
348	return 0;
349}
350#endif
351
352static const struct reg_default wm8994_revc_patch[] = {
353	{ 0x102, 0x3 },
354	{ 0x56, 0x3 },
355	{ 0x817, 0x0 },
356	{ 0x102, 0x0 },
357};
358
359static const struct reg_default wm8958_reva_patch[] = {
360	{ 0x102, 0x3 },
361	{ 0xcb, 0x81 },
362	{ 0x817, 0x0 },
363	{ 0x102, 0x0 },
364};
365
366static const struct reg_default wm1811_reva_patch[] = {
367	{ 0x102, 0x3 },
368	{ 0x56, 0xc07 },
369	{ 0x5d, 0x7e },
370	{ 0x5e, 0x0 },
371	{ 0x102, 0x0 },
372};
373
374#ifdef CONFIG_OF
375static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
376{
377	struct device_node *np = wm8994->dev->of_node;
378	struct wm8994_pdata *pdata = &wm8994->pdata;
379	int i;
380
381	if (!np)
382		return 0;
383
384	if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
385				       ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
386		for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
387			if (wm8994->pdata.gpio_defaults[i] == 0)
388				pdata->gpio_defaults[i]
389					= WM8994_CONFIGURE_GPIO;
390		}
391	}
392
393	of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
394				   ARRAY_SIZE(pdata->micbias));
395
396	pdata->lineout1_diff = true;
397	pdata->lineout2_diff = true;
398	if (of_find_property(np, "wlf,lineout1-se", NULL))
399		pdata->lineout1_diff = false;
400	if (of_find_property(np, "wlf,lineout2-se", NULL))
401		pdata->lineout2_diff = false;
402
403	if (of_find_property(np, "wlf,lineout1-feedback", NULL))
404		pdata->lineout1fb = true;
405	if (of_find_property(np, "wlf,lineout2-feedback", NULL))
406		pdata->lineout2fb = true;
407
408	if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
409		pdata->lineout2fb = true;
410
411	pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
412	if (pdata->ldo[0].enable < 0)
413		pdata->ldo[0].enable = 0;
414
415	pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
416	if (pdata->ldo[1].enable < 0)
417		pdata->ldo[1].enable = 0;
418
419	return 0;
420}
421#else
422static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
423{
424	return 0;
425}
426#endif
427
428/*
429 * Instantiate the generic non-control parts of the device.
430 */
431static int wm8994_device_init(struct wm8994 *wm8994, int irq)
432{
433	struct wm8994_pdata *pdata;
434	struct regmap_config *regmap_config;
435	const struct reg_default *regmap_patch = NULL;
436	const char *devname;
437	int ret, i, patch_regs = 0;
438	int pulls = 0;
439
440	if (dev_get_platdata(wm8994->dev)) {
441		pdata = dev_get_platdata(wm8994->dev);
442		wm8994->pdata = *pdata;
443	}
444	pdata = &wm8994->pdata;
445
446	ret = wm8994_set_pdata_from_of(wm8994);
447	if (ret != 0)
448		return ret;
449
450	dev_set_drvdata(wm8994->dev, wm8994);
451
452	/* Add the on-chip regulators first for bootstrapping */
453	ret = mfd_add_devices(wm8994->dev, -1,
454			      wm8994_regulator_devs,
455			      ARRAY_SIZE(wm8994_regulator_devs),
456			      NULL, 0, NULL);
457	if (ret != 0) {
458		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
459		goto err;
460	}
461
462	switch (wm8994->type) {
463	case WM1811:
464		wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
465		break;
466	case WM8994:
467		wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
468		break;
469	case WM8958:
470		wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
471		break;
472	default:
473		BUG();
474		goto err;
475	}
476
477	wm8994->supplies = devm_kzalloc(wm8994->dev,
478					sizeof(struct regulator_bulk_data) *
479					wm8994->num_supplies, GFP_KERNEL);
480	if (!wm8994->supplies) {
481		ret = -ENOMEM;
482		goto err;
483	}
484
485	switch (wm8994->type) {
486	case WM1811:
487		for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
488			wm8994->supplies[i].supply = wm1811_main_supplies[i];
489		break;
490	case WM8994:
491		for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
492			wm8994->supplies[i].supply = wm8994_main_supplies[i];
493		break;
494	case WM8958:
495		for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
496			wm8994->supplies[i].supply = wm8958_main_supplies[i];
497		break;
498	default:
499		BUG();
500		goto err;
501	}
502
503	ret = devm_regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
504				 wm8994->supplies);
505	if (ret != 0) {
506		dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
507		goto err;
508	}
509
510	ret = regulator_bulk_enable(wm8994->num_supplies,
511				    wm8994->supplies);
512	if (ret != 0) {
513		dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
514		goto err;
515	}
516
517	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
518	if (ret < 0) {
519		dev_err(wm8994->dev, "Failed to read ID register\n");
520		goto err_enable;
521	}
522	switch (ret) {
523	case 0x1811:
524		devname = "WM1811";
525		if (wm8994->type != WM1811)
526			dev_warn(wm8994->dev, "Device registered as type %d\n",
527				 wm8994->type);
528		wm8994->type = WM1811;
529		break;
530	case 0x8994:
531		devname = "WM8994";
532		if (wm8994->type != WM8994)
533			dev_warn(wm8994->dev, "Device registered as type %d\n",
534				 wm8994->type);
535		wm8994->type = WM8994;
536		break;
537	case 0x8958:
538		devname = "WM8958";
539		if (wm8994->type != WM8958)
540			dev_warn(wm8994->dev, "Device registered as type %d\n",
541				 wm8994->type);
542		wm8994->type = WM8958;
543		break;
544	default:
545		dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
546			ret);
547		ret = -EINVAL;
548		goto err_enable;
549	}
550
551	ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
552	if (ret < 0) {
553		dev_err(wm8994->dev, "Failed to read revision register: %d\n",
554			ret);
555		goto err_enable;
556	}
557	wm8994->revision = ret & WM8994_CHIP_REV_MASK;
558	wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
559
560	switch (wm8994->type) {
561	case WM8994:
562		switch (wm8994->revision) {
563		case 0:
564		case 1:
565			dev_warn(wm8994->dev,
566				 "revision %c not fully supported\n",
567				 'A' + wm8994->revision);
568			break;
569		case 2:
570		case 3:
571		default:
572			regmap_patch = wm8994_revc_patch;
573			patch_regs = ARRAY_SIZE(wm8994_revc_patch);
574			break;
575		}
576		break;
577
578	case WM8958:
579		switch (wm8994->revision) {
580		case 0:
581			regmap_patch = wm8958_reva_patch;
582			patch_regs = ARRAY_SIZE(wm8958_reva_patch);
583			break;
584		default:
585			break;
586		}
587		break;
588
589	case WM1811:
590		/* Revision C did not change the relevant layer */
591		if (wm8994->revision > 1)
592			wm8994->revision++;
593
594		regmap_patch = wm1811_reva_patch;
595		patch_regs = ARRAY_SIZE(wm1811_reva_patch);
596		break;
597
598	default:
599		break;
600	}
601
602	dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
603		 'A' + wm8994->revision, wm8994->cust_id);
604
605	switch (wm8994->type) {
606	case WM1811:
607		regmap_config = &wm1811_regmap_config;
608		break;
609	case WM8994:
610		regmap_config = &wm8994_regmap_config;
611		break;
612	case WM8958:
613		regmap_config = &wm8958_regmap_config;
614		break;
615	default:
616		dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
617		return -EINVAL;
618	}
619
620	ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
621	if (ret != 0) {
622		dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
623			ret);
624		return ret;
625	}
626
627	/* Explicitly put the device into reset in case regulators
628	 * don't get disabled in order to ensure we know the device
629	 * state.
630	 */
631	ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
632			       wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
633	if (ret != 0) {
634		dev_err(wm8994->dev, "Failed to reset device: %d\n", ret);
635		return ret;
636	}
637
638	if (regmap_patch) {
639		ret = regmap_register_patch(wm8994->regmap, regmap_patch,
640					    patch_regs);
641		if (ret != 0) {
642			dev_err(wm8994->dev, "Failed to register patch: %d\n",
643				ret);
644			goto err;
645		}
646	}
647
648	wm8994->irq_base = pdata->irq_base;
649	wm8994->gpio_base = pdata->gpio_base;
650
651	/* GPIO configuration is only applied if it's non-zero */
652	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
653		if (pdata->gpio_defaults[i]) {
654			wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
655					0xffff, pdata->gpio_defaults[i]);
656		}
657	}
658
659	wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
660
661	if (pdata->spkmode_pu)
662		pulls |= WM8994_SPKMODE_PU;
663
664	/* Disable unneeded pulls */
665	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
666			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
667			WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
668			pulls);
669
670	/* In some system designs where the regulators are not in use,
671	 * we can achieve a small reduction in leakage currents by
672	 * floating LDO outputs.  This bit makes no difference if the
673	 * LDOs are enabled, it only affects cases where the LDOs were
674	 * in operation and are then disabled.
675	 */
676	for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
677		if (wm8994_ldo_in_use(pdata, i))
678			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
679					WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
680		else
681			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
682					WM8994_LDO1_DISCH, 0);
683	}
684
685	wm8994_irq_init(wm8994);
686
687	ret = mfd_add_devices(wm8994->dev, -1,
688			      wm8994_devs, ARRAY_SIZE(wm8994_devs),
689			      NULL, 0, NULL);
690	if (ret != 0) {
691		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
692		goto err_irq;
693	}
694
695	pm_runtime_enable(wm8994->dev);
696	pm_runtime_idle(wm8994->dev);
697
698	return 0;
699
700err_irq:
701	wm8994_irq_exit(wm8994);
702err_enable:
703	regulator_bulk_disable(wm8994->num_supplies,
704			       wm8994->supplies);
705err:
706	mfd_remove_devices(wm8994->dev);
707	return ret;
708}
709
710static void wm8994_device_exit(struct wm8994 *wm8994)
711{
712	pm_runtime_disable(wm8994->dev);
713	mfd_remove_devices(wm8994->dev);
714	wm8994_irq_exit(wm8994);
715	regulator_bulk_disable(wm8994->num_supplies,
716			       wm8994->supplies);
717}
718
719static const struct of_device_id wm8994_of_match[] = {
720	{ .compatible = "wlf,wm1811", .data = (void *)WM1811 },
721	{ .compatible = "wlf,wm8994", .data = (void *)WM8994 },
722	{ .compatible = "wlf,wm8958", .data = (void *)WM8958 },
723	{ }
724};
725MODULE_DEVICE_TABLE(of, wm8994_of_match);
726
727static int wm8994_i2c_probe(struct i2c_client *i2c,
728				      const struct i2c_device_id *id)
729{
730	const struct of_device_id *of_id;
731	struct wm8994 *wm8994;
732	int ret;
733
734	wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
735	if (wm8994 == NULL)
736		return -ENOMEM;
737
738	i2c_set_clientdata(i2c, wm8994);
739	wm8994->dev = &i2c->dev;
740	wm8994->irq = i2c->irq;
741
742	if (i2c->dev.of_node) {
743		of_id = of_match_device(wm8994_of_match, &i2c->dev);
744		if (of_id)
745			wm8994->type = (int)of_id->data;
746	} else {
747		wm8994->type = id->driver_data;
748	}
749
750	wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
751	if (IS_ERR(wm8994->regmap)) {
752		ret = PTR_ERR(wm8994->regmap);
753		dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
754			ret);
755		return ret;
756	}
757
758	return wm8994_device_init(wm8994, i2c->irq);
759}
760
761static int wm8994_i2c_remove(struct i2c_client *i2c)
762{
763	struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
764
765	wm8994_device_exit(wm8994);
766
767	return 0;
768}
769
770static const struct i2c_device_id wm8994_i2c_id[] = {
771	{ "wm1811", WM1811 },
772	{ "wm1811a", WM1811 },
773	{ "wm8994", WM8994 },
774	{ "wm8958", WM8958 },
775	{ }
776};
777MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
778
779static const struct dev_pm_ops wm8994_pm_ops = {
780	SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
781};
782
783static struct i2c_driver wm8994_i2c_driver = {
784	.driver = {
785		.name = "wm8994",
786		.owner = THIS_MODULE,
787		.pm = &wm8994_pm_ops,
788		.of_match_table = of_match_ptr(wm8994_of_match),
789	},
790	.probe = wm8994_i2c_probe,
791	.remove = wm8994_i2c_remove,
792	.id_table = wm8994_i2c_id,
793};
794
795module_i2c_driver(wm8994_i2c_driver);
796
797MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
798MODULE_LICENSE("GPL");
799MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
800