2 * wm8731.c -- WM8731 ALSA SoC Audio driver
4 * Copyright 2005 Openedhand Ltd.
6 * Author: Richard Purdie <richard@openedhand.com>
8 * Based on wm8753.c by Liam Girdwood
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.h>
22 #include <linux/spi/spi.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.h>
28 #include <sound/initval.h>
32 #define WM8731_VERSION "0.13"
34 struct snd_soc_codec_device soc_codec_dev_wm8731
;
36 /* codec private data */
42 * wm8731 register cache
43 * We can't read the WM8731 register space when we are
44 * using 2 wire for device control, so we cache them instead.
45 * There is no point in caching the reset register
47 static const u16 wm8731_reg
[WM8731_CACHEREGNUM
] = {
48 0x0097, 0x0097, 0x0079, 0x0079,
49 0x000a, 0x0008, 0x009f, 0x000a,
54 * read wm8731 register cache
56 static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec
*codec
,
59 u16
*cache
= codec
->reg_cache
;
60 if (reg
== WM8731_RESET
)
62 if (reg
>= WM8731_CACHEREGNUM
)
68 * write wm8731 register cache
70 static inline void wm8731_write_reg_cache(struct snd_soc_codec
*codec
,
71 u16 reg
, unsigned int value
)
73 u16
*cache
= codec
->reg_cache
;
74 if (reg
>= WM8731_CACHEREGNUM
)
80 * write to the WM8731 register space
82 static int wm8731_write(struct snd_soc_codec
*codec
, unsigned int reg
,
88 * D15..D9 WM8731 register offset
89 * D8...D0 register data
91 data
[0] = (reg
<< 1) | ((value
>> 8) & 0x0001);
92 data
[1] = value
& 0x00ff;
94 wm8731_write_reg_cache(codec
, reg
, value
);
95 if (codec
->hw_write(codec
->control_data
, data
, 2) == 2)
101 #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
103 static const char *wm8731_input_select
[] = {"Line In", "Mic"};
104 static const char *wm8731_deemph
[] = {"None", "32Khz", "44.1Khz", "48Khz"};
106 static const struct soc_enum wm8731_enum
[] = {
107 SOC_ENUM_SINGLE(WM8731_APANA
, 2, 2, wm8731_input_select
),
108 SOC_ENUM_SINGLE(WM8731_APDIGI
, 1, 4, wm8731_deemph
),
111 static const struct snd_kcontrol_new wm8731_snd_controls
[] = {
113 SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V
, WM8731_ROUT1V
,
115 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V
, WM8731_ROUT1V
,
118 SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL
, WM8731_RINVOL
, 0, 31, 0),
119 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL
, WM8731_RINVOL
, 7, 1, 1),
121 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA
, 0, 1, 0),
122 SOC_SINGLE("Capture Mic Switch", WM8731_APANA
, 1, 1, 1),
124 SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA
, 6, 3, 1),
126 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI
, 0, 1, 1),
127 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI
, 4, 1, 0),
129 SOC_ENUM("Playback De-emphasis", wm8731_enum
[1]),
133 static const struct snd_kcontrol_new wm8731_output_mixer_controls
[] = {
134 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA
, 3, 1, 0),
135 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA
, 5, 1, 0),
136 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA
, 4, 1, 0),
140 static const struct snd_kcontrol_new wm8731_input_mux_controls
=
141 SOC_DAPM_ENUM("Input Select", wm8731_enum
[0]);
143 static const struct snd_soc_dapm_widget wm8731_dapm_widgets
[] = {
144 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR
, 4, 1,
145 &wm8731_output_mixer_controls
[0],
146 ARRAY_SIZE(wm8731_output_mixer_controls
)),
147 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR
, 3, 1),
148 SND_SOC_DAPM_OUTPUT("LOUT"),
149 SND_SOC_DAPM_OUTPUT("LHPOUT"),
150 SND_SOC_DAPM_OUTPUT("ROUT"),
151 SND_SOC_DAPM_OUTPUT("RHPOUT"),
152 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR
, 2, 1),
153 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM
, 0, 0, &wm8731_input_mux_controls
),
154 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR
, 0, 1, NULL
, 0),
155 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR
, 1, 1),
156 SND_SOC_DAPM_INPUT("MICIN"),
157 SND_SOC_DAPM_INPUT("RLINEIN"),
158 SND_SOC_DAPM_INPUT("LLINEIN"),
161 static const struct snd_soc_dapm_route intercon
[] = {
163 {"Output Mixer", "Line Bypass Switch", "Line Input"},
164 {"Output Mixer", "HiFi Playback Switch", "DAC"},
165 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
168 {"RHPOUT", NULL
, "Output Mixer"},
169 {"ROUT", NULL
, "Output Mixer"},
170 {"LHPOUT", NULL
, "Output Mixer"},
171 {"LOUT", NULL
, "Output Mixer"},
174 {"Input Mux", "Line In", "Line Input"},
175 {"Input Mux", "Mic", "Mic Bias"},
176 {"ADC", NULL
, "Input Mux"},
179 {"Line Input", NULL
, "LLINEIN"},
180 {"Line Input", NULL
, "RLINEIN"},
181 {"Mic Bias", NULL
, "MICIN"},
184 static int wm8731_add_widgets(struct snd_soc_codec
*codec
)
186 snd_soc_dapm_new_controls(codec
, wm8731_dapm_widgets
,
187 ARRAY_SIZE(wm8731_dapm_widgets
));
189 snd_soc_dapm_add_routes(codec
, intercon
, ARRAY_SIZE(intercon
));
191 snd_soc_dapm_new_widgets(codec
);
204 /* codec mclk clock divider coefficients */
205 static const struct _coeff_div coeff_div
[] = {
207 {12288000, 48000, 256, 0x0, 0x0, 0x0},
208 {18432000, 48000, 384, 0x0, 0x1, 0x0},
209 {12000000, 48000, 250, 0x0, 0x0, 0x1},
212 {12288000, 32000, 384, 0x6, 0x0, 0x0},
213 {18432000, 32000, 576, 0x6, 0x1, 0x0},
214 {12000000, 32000, 375, 0x6, 0x0, 0x1},
217 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
218 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
219 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
220 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
221 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
224 {12288000, 96000, 128, 0x7, 0x0, 0x0},
225 {18432000, 96000, 192, 0x7, 0x1, 0x0},
226 {12000000, 96000, 125, 0x7, 0x0, 0x1},
229 {11289600, 44100, 256, 0x8, 0x0, 0x0},
230 {16934400, 44100, 384, 0x8, 0x1, 0x0},
231 {12000000, 44100, 272, 0x8, 0x1, 0x1},
234 {11289600, 88200, 128, 0xf, 0x0, 0x0},
235 {16934400, 88200, 192, 0xf, 0x1, 0x0},
236 {12000000, 88200, 136, 0xf, 0x1, 0x1},
239 static inline int get_coeff(int mclk
, int rate
)
243 for (i
= 0; i
< ARRAY_SIZE(coeff_div
); i
++) {
244 if (coeff_div
[i
].rate
== rate
&& coeff_div
[i
].mclk
== mclk
)
250 static int wm8731_hw_params(struct snd_pcm_substream
*substream
,
251 struct snd_pcm_hw_params
*params
,
252 struct snd_soc_dai
*dai
)
254 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
255 struct snd_soc_device
*socdev
= rtd
->socdev
;
256 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
257 struct wm8731_priv
*wm8731
= codec
->private_data
;
258 u16 iface
= wm8731_read_reg_cache(codec
, WM8731_IFACE
) & 0xfff3;
259 int i
= get_coeff(wm8731
->sysclk
, params_rate(params
));
260 u16 srate
= (coeff_div
[i
].sr
<< 2) |
261 (coeff_div
[i
].bosr
<< 1) | coeff_div
[i
].usb
;
263 wm8731_write(codec
, WM8731_SRATE
, srate
);
266 switch (params_format(params
)) {
267 case SNDRV_PCM_FORMAT_S16_LE
:
269 case SNDRV_PCM_FORMAT_S20_3LE
:
272 case SNDRV_PCM_FORMAT_S24_LE
:
277 wm8731_write(codec
, WM8731_IFACE
, iface
);
281 static int wm8731_pcm_prepare(struct snd_pcm_substream
*substream
,
282 struct snd_soc_dai
*dai
)
284 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
285 struct snd_soc_device
*socdev
= rtd
->socdev
;
286 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
289 wm8731_write(codec
, WM8731_ACTIVE
, 0x0001);
294 static void wm8731_shutdown(struct snd_pcm_substream
*substream
,
295 struct snd_soc_dai
*dai
)
297 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
298 struct snd_soc_device
*socdev
= rtd
->socdev
;
299 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
302 if (!codec
->active
) {
304 wm8731_write(codec
, WM8731_ACTIVE
, 0x0);
308 static int wm8731_mute(struct snd_soc_dai
*dai
, int mute
)
310 struct snd_soc_codec
*codec
= dai
->codec
;
311 u16 mute_reg
= wm8731_read_reg_cache(codec
, WM8731_APDIGI
) & 0xfff7;
314 wm8731_write(codec
, WM8731_APDIGI
, mute_reg
| 0x8);
316 wm8731_write(codec
, WM8731_APDIGI
, mute_reg
);
320 static int wm8731_set_dai_sysclk(struct snd_soc_dai
*codec_dai
,
321 int clk_id
, unsigned int freq
, int dir
)
323 struct snd_soc_codec
*codec
= codec_dai
->codec
;
324 struct wm8731_priv
*wm8731
= codec
->private_data
;
332 wm8731
->sysclk
= freq
;
339 static int wm8731_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
342 struct snd_soc_codec
*codec
= codec_dai
->codec
;
345 /* set master/slave audio interface */
346 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
347 case SND_SOC_DAIFMT_CBM_CFM
:
350 case SND_SOC_DAIFMT_CBS_CFS
:
356 /* interface format */
357 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
358 case SND_SOC_DAIFMT_I2S
:
361 case SND_SOC_DAIFMT_RIGHT_J
:
363 case SND_SOC_DAIFMT_LEFT_J
:
366 case SND_SOC_DAIFMT_DSP_A
:
369 case SND_SOC_DAIFMT_DSP_B
:
376 /* clock inversion */
377 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
378 case SND_SOC_DAIFMT_NB_NF
:
380 case SND_SOC_DAIFMT_IB_IF
:
383 case SND_SOC_DAIFMT_IB_NF
:
386 case SND_SOC_DAIFMT_NB_IF
:
394 wm8731_write(codec
, WM8731_IFACE
, iface
);
398 static int wm8731_set_bias_level(struct snd_soc_codec
*codec
,
399 enum snd_soc_bias_level level
)
401 u16 reg
= wm8731_read_reg_cache(codec
, WM8731_PWR
) & 0xff7f;
404 case SND_SOC_BIAS_ON
:
405 /* vref/mid, osc on, dac unmute */
406 wm8731_write(codec
, WM8731_PWR
, reg
);
408 case SND_SOC_BIAS_PREPARE
:
410 case SND_SOC_BIAS_STANDBY
:
411 /* everything off except vref/vmid, */
412 wm8731_write(codec
, WM8731_PWR
, reg
| 0x0040);
414 case SND_SOC_BIAS_OFF
:
415 /* everything off, dac mute, inactive */
416 wm8731_write(codec
, WM8731_ACTIVE
, 0x0);
417 wm8731_write(codec
, WM8731_PWR
, 0xffff);
420 codec
->bias_level
= level
;
424 #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
425 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
426 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
427 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
428 SNDRV_PCM_RATE_96000)
430 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
431 SNDRV_PCM_FMTBIT_S24_LE)
433 struct snd_soc_dai wm8731_dai
= {
436 .stream_name
= "Playback",
439 .rates
= WM8731_RATES
,
440 .formats
= WM8731_FORMATS
,},
442 .stream_name
= "Capture",
445 .rates
= WM8731_RATES
,
446 .formats
= WM8731_FORMATS
,},
448 .prepare
= wm8731_pcm_prepare
,
449 .hw_params
= wm8731_hw_params
,
450 .shutdown
= wm8731_shutdown
,
451 .digital_mute
= wm8731_mute
,
452 .set_sysclk
= wm8731_set_dai_sysclk
,
453 .set_fmt
= wm8731_set_dai_fmt
,
456 EXPORT_SYMBOL_GPL(wm8731_dai
);
458 static int wm8731_suspend(struct platform_device
*pdev
, pm_message_t state
)
460 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
461 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
463 wm8731_write(codec
, WM8731_ACTIVE
, 0x0);
464 wm8731_set_bias_level(codec
, SND_SOC_BIAS_OFF
);
468 static int wm8731_resume(struct platform_device
*pdev
)
470 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
471 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
474 u16
*cache
= codec
->reg_cache
;
476 /* Sync reg_cache with the hardware */
477 for (i
= 0; i
< ARRAY_SIZE(wm8731_reg
); i
++) {
478 data
[0] = (i
<< 1) | ((cache
[i
] >> 8) & 0x0001);
479 data
[1] = cache
[i
] & 0x00ff;
480 codec
->hw_write(codec
->control_data
, data
, 2);
482 wm8731_set_bias_level(codec
, SND_SOC_BIAS_STANDBY
);
483 wm8731_set_bias_level(codec
, codec
->suspend_bias_level
);
488 * initialise the WM8731 driver
489 * register the mixer and dsp interfaces with the kernel
491 static int wm8731_init(struct snd_soc_device
*socdev
)
493 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
496 codec
->name
= "WM8731";
497 codec
->owner
= THIS_MODULE
;
498 codec
->read
= wm8731_read_reg_cache
;
499 codec
->write
= wm8731_write
;
500 codec
->set_bias_level
= wm8731_set_bias_level
;
501 codec
->dai
= &wm8731_dai
;
503 codec
->reg_cache_size
= ARRAY_SIZE(wm8731_reg
);
504 codec
->reg_cache
= kmemdup(wm8731_reg
, sizeof(wm8731_reg
), GFP_KERNEL
);
505 if (codec
->reg_cache
== NULL
)
511 ret
= snd_soc_new_pcms(socdev
, SNDRV_DEFAULT_IDX1
, SNDRV_DEFAULT_STR1
);
513 printk(KERN_ERR
"wm8731: failed to create pcms\n");
517 /* power on device */
518 wm8731_set_bias_level(codec
, SND_SOC_BIAS_STANDBY
);
520 /* set the update bits */
521 reg
= wm8731_read_reg_cache(codec
, WM8731_LOUT1V
);
522 wm8731_write(codec
, WM8731_LOUT1V
, reg
& ~0x0100);
523 reg
= wm8731_read_reg_cache(codec
, WM8731_ROUT1V
);
524 wm8731_write(codec
, WM8731_ROUT1V
, reg
& ~0x0100);
525 reg
= wm8731_read_reg_cache(codec
, WM8731_LINVOL
);
526 wm8731_write(codec
, WM8731_LINVOL
, reg
& ~0x0100);
527 reg
= wm8731_read_reg_cache(codec
, WM8731_RINVOL
);
528 wm8731_write(codec
, WM8731_RINVOL
, reg
& ~0x0100);
530 snd_soc_add_controls(codec
, wm8731_snd_controls
,
531 ARRAY_SIZE(wm8731_snd_controls
));
532 wm8731_add_widgets(codec
);
533 ret
= snd_soc_init_card(socdev
);
535 printk(KERN_ERR
"wm8731: failed to register card\n");
542 snd_soc_free_pcms(socdev
);
543 snd_soc_dapm_free(socdev
);
545 kfree(codec
->reg_cache
);
549 static struct snd_soc_device
*wm8731_socdev
;
551 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
554 * WM8731 2 wire address is determined by GPIO5
555 * state during powerup.
560 static int wm8731_i2c_probe(struct i2c_client
*i2c
,
561 const struct i2c_device_id
*id
)
563 struct snd_soc_device
*socdev
= wm8731_socdev
;
564 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
567 i2c_set_clientdata(i2c
, codec
);
568 codec
->control_data
= i2c
;
570 ret
= wm8731_init(socdev
);
572 pr_err("failed to initialise WM8731\n");
577 static int wm8731_i2c_remove(struct i2c_client
*client
)
579 struct snd_soc_codec
*codec
= i2c_get_clientdata(client
);
580 kfree(codec
->reg_cache
);
584 static const struct i2c_device_id wm8731_i2c_id
[] = {
588 MODULE_DEVICE_TABLE(i2c
, wm8731_i2c_id
);
590 static struct i2c_driver wm8731_i2c_driver
= {
592 .name
= "WM8731 I2C Codec",
593 .owner
= THIS_MODULE
,
595 .probe
= wm8731_i2c_probe
,
596 .remove
= wm8731_i2c_remove
,
597 .id_table
= wm8731_i2c_id
,
600 static int wm8731_add_i2c_device(struct platform_device
*pdev
,
601 const struct wm8731_setup_data
*setup
)
603 struct i2c_board_info info
;
604 struct i2c_adapter
*adapter
;
605 struct i2c_client
*client
;
608 ret
= i2c_add_driver(&wm8731_i2c_driver
);
610 dev_err(&pdev
->dev
, "can't add i2c driver\n");
614 memset(&info
, 0, sizeof(struct i2c_board_info
));
615 info
.addr
= setup
->i2c_address
;
616 strlcpy(info
.type
, "wm8731", I2C_NAME_SIZE
);
618 adapter
= i2c_get_adapter(setup
->i2c_bus
);
620 dev_err(&pdev
->dev
, "can't get i2c adapter %d\n",
625 client
= i2c_new_device(adapter
, &info
);
626 i2c_put_adapter(adapter
);
628 dev_err(&pdev
->dev
, "can't add i2c device at 0x%x\n",
629 (unsigned int)info
.addr
);
636 i2c_del_driver(&wm8731_i2c_driver
);
641 #if defined(CONFIG_SPI_MASTER)
642 static int __devinit
wm8731_spi_probe(struct spi_device
*spi
)
644 struct snd_soc_device
*socdev
= wm8731_socdev
;
645 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
648 codec
->control_data
= spi
;
650 ret
= wm8731_init(socdev
);
652 dev_err(&spi
->dev
, "failed to initialise WM8731\n");
657 static int __devexit
wm8731_spi_remove(struct spi_device
*spi
)
662 static struct spi_driver wm8731_spi_driver
= {
665 .bus
= &spi_bus_type
,
666 .owner
= THIS_MODULE
,
668 .probe
= wm8731_spi_probe
,
669 .remove
= __devexit_p(wm8731_spi_remove
),
672 static int wm8731_spi_write(struct spi_device
*spi
, const char *data
, int len
)
674 struct spi_transfer t
;
675 struct spi_message m
;
684 spi_message_init(&m
);
685 memset(&t
, 0, (sizeof t
));
690 spi_message_add_tail(&t
, &m
);
695 #endif /* CONFIG_SPI_MASTER */
697 static int wm8731_probe(struct platform_device
*pdev
)
699 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
700 struct wm8731_setup_data
*setup
;
701 struct snd_soc_codec
*codec
;
702 struct wm8731_priv
*wm8731
;
705 pr_info("WM8731 Audio Codec %s", WM8731_VERSION
);
707 setup
= socdev
->codec_data
;
708 codec
= kzalloc(sizeof(struct snd_soc_codec
), GFP_KERNEL
);
712 wm8731
= kzalloc(sizeof(struct wm8731_priv
), GFP_KERNEL
);
713 if (wm8731
== NULL
) {
718 codec
->private_data
= wm8731
;
719 socdev
->card
->codec
= codec
;
720 mutex_init(&codec
->mutex
);
721 INIT_LIST_HEAD(&codec
->dapm_widgets
);
722 INIT_LIST_HEAD(&codec
->dapm_paths
);
724 wm8731_socdev
= socdev
;
727 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
728 if (setup
->i2c_address
) {
729 codec
->hw_write
= (hw_write_t
)i2c_master_send
;
730 ret
= wm8731_add_i2c_device(pdev
, setup
);
733 #if defined(CONFIG_SPI_MASTER)
735 codec
->hw_write
= (hw_write_t
)wm8731_spi_write
;
736 ret
= spi_register_driver(&wm8731_spi_driver
);
738 printk(KERN_ERR
"can't add spi driver");
743 kfree(codec
->private_data
);
749 /* power down chip */
750 static int wm8731_remove(struct platform_device
*pdev
)
752 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
753 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
755 if (codec
->control_data
)
756 wm8731_set_bias_level(codec
, SND_SOC_BIAS_OFF
);
758 snd_soc_free_pcms(socdev
);
759 snd_soc_dapm_free(socdev
);
760 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
761 i2c_unregister_device(codec
->control_data
);
762 i2c_del_driver(&wm8731_i2c_driver
);
764 #if defined(CONFIG_SPI_MASTER)
765 spi_unregister_driver(&wm8731_spi_driver
);
767 kfree(codec
->private_data
);
773 struct snd_soc_codec_device soc_codec_dev_wm8731
= {
774 .probe
= wm8731_probe
,
775 .remove
= wm8731_remove
,
776 .suspend
= wm8731_suspend
,
777 .resume
= wm8731_resume
,
779 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731
);
781 static int __init
wm8731_modinit(void)
783 return snd_soc_register_dai(&wm8731_dai
);
785 module_init(wm8731_modinit
);
787 static void __exit
wm8731_exit(void)
789 snd_soc_unregister_dai(&wm8731_dai
);
791 module_exit(wm8731_exit
);
793 MODULE_DESCRIPTION("ASoC WM8731 driver");
794 MODULE_AUTHOR("Richard Purdie");
795 MODULE_LICENSE("GPL");