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/regulator/consumer.h>
23 #include <linux/spi/spi.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28 #include <sound/soc-dapm.h>
29 #include <sound/initval.h>
30 #include <sound/tlv.h>
34 static struct snd_soc_codec
*wm8731_codec
;
35 struct snd_soc_codec_device soc_codec_dev_wm8731
;
37 #define WM8731_NUM_SUPPLIES 4
38 static const char *wm8731_supply_names
[WM8731_NUM_SUPPLIES
] = {
45 /* codec private data */
47 struct snd_soc_codec codec
;
48 struct regulator_bulk_data supplies
[WM8731_NUM_SUPPLIES
];
49 u16 reg_cache
[WM8731_CACHEREGNUM
];
55 * wm8731 register cache
56 * We can't read the WM8731 register space when we are
57 * using 2 wire for device control, so we cache them instead.
58 * There is no point in caching the reset register
60 static const u16 wm8731_reg
[WM8731_CACHEREGNUM
] = {
61 0x0097, 0x0097, 0x0079, 0x0079,
62 0x000a, 0x0008, 0x009f, 0x000a,
66 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
68 static const char *wm8731_input_select
[] = {"Line In", "Mic"};
69 static const char *wm8731_deemph
[] = {"None", "32Khz", "44.1Khz", "48Khz"};
71 static const struct soc_enum wm8731_enum
[] = {
72 SOC_ENUM_SINGLE(WM8731_APANA
, 2, 2, wm8731_input_select
),
73 SOC_ENUM_SINGLE(WM8731_APDIGI
, 1, 4, wm8731_deemph
),
76 static const DECLARE_TLV_DB_SCALE(in_tlv
, -3450, 150, 0);
77 static const DECLARE_TLV_DB_SCALE(sidetone_tlv
, -1500, 300, 0);
78 static const DECLARE_TLV_DB_SCALE(out_tlv
, -12100, 100, 1);
80 static const struct snd_kcontrol_new wm8731_snd_controls
[] = {
82 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V
, WM8731_ROUT1V
,
84 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V
, WM8731_ROUT1V
,
87 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL
, WM8731_RINVOL
, 0, 31, 0,
89 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL
, WM8731_RINVOL
, 7, 1, 1),
91 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA
, 0, 1, 0),
92 SOC_SINGLE("Mic Capture Switch", WM8731_APANA
, 1, 1, 1),
94 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA
, 6, 3, 1,
97 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI
, 0, 1, 1),
98 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI
, 4, 1, 0),
100 SOC_ENUM("Playback De-emphasis", wm8731_enum
[1]),
104 static const struct snd_kcontrol_new wm8731_output_mixer_controls
[] = {
105 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA
, 3, 1, 0),
106 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA
, 5, 1, 0),
107 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA
, 4, 1, 0),
111 static const struct snd_kcontrol_new wm8731_input_mux_controls
=
112 SOC_DAPM_ENUM("Input Select", wm8731_enum
[0]);
114 static const struct snd_soc_dapm_widget wm8731_dapm_widgets
[] = {
115 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR
, 4, 1,
116 &wm8731_output_mixer_controls
[0],
117 ARRAY_SIZE(wm8731_output_mixer_controls
)),
118 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR
, 3, 1),
119 SND_SOC_DAPM_OUTPUT("LOUT"),
120 SND_SOC_DAPM_OUTPUT("LHPOUT"),
121 SND_SOC_DAPM_OUTPUT("ROUT"),
122 SND_SOC_DAPM_OUTPUT("RHPOUT"),
123 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR
, 2, 1),
124 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM
, 0, 0, &wm8731_input_mux_controls
),
125 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR
, 0, 1, NULL
, 0),
126 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR
, 1, 1),
127 SND_SOC_DAPM_INPUT("MICIN"),
128 SND_SOC_DAPM_INPUT("RLINEIN"),
129 SND_SOC_DAPM_INPUT("LLINEIN"),
132 static const struct snd_soc_dapm_route intercon
[] = {
134 {"Output Mixer", "Line Bypass Switch", "Line Input"},
135 {"Output Mixer", "HiFi Playback Switch", "DAC"},
136 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
139 {"RHPOUT", NULL
, "Output Mixer"},
140 {"ROUT", NULL
, "Output Mixer"},
141 {"LHPOUT", NULL
, "Output Mixer"},
142 {"LOUT", NULL
, "Output Mixer"},
145 {"Input Mux", "Line In", "Line Input"},
146 {"Input Mux", "Mic", "Mic Bias"},
147 {"ADC", NULL
, "Input Mux"},
150 {"Line Input", NULL
, "LLINEIN"},
151 {"Line Input", NULL
, "RLINEIN"},
152 {"Mic Bias", NULL
, "MICIN"},
155 static int wm8731_add_widgets(struct snd_soc_codec
*codec
)
157 snd_soc_dapm_new_controls(codec
, wm8731_dapm_widgets
,
158 ARRAY_SIZE(wm8731_dapm_widgets
));
160 snd_soc_dapm_add_routes(codec
, intercon
, ARRAY_SIZE(intercon
));
174 /* codec mclk clock divider coefficients */
175 static const struct _coeff_div coeff_div
[] = {
177 {12288000, 48000, 256, 0x0, 0x0, 0x0},
178 {18432000, 48000, 384, 0x0, 0x1, 0x0},
179 {12000000, 48000, 250, 0x0, 0x0, 0x1},
182 {12288000, 32000, 384, 0x6, 0x0, 0x0},
183 {18432000, 32000, 576, 0x6, 0x1, 0x0},
184 {12000000, 32000, 375, 0x6, 0x0, 0x1},
187 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
188 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
189 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
190 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
191 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
194 {12288000, 96000, 128, 0x7, 0x0, 0x0},
195 {18432000, 96000, 192, 0x7, 0x1, 0x0},
196 {12000000, 96000, 125, 0x7, 0x0, 0x1},
199 {11289600, 44100, 256, 0x8, 0x0, 0x0},
200 {16934400, 44100, 384, 0x8, 0x1, 0x0},
201 {12000000, 44100, 272, 0x8, 0x1, 0x1},
204 {11289600, 88200, 128, 0xf, 0x0, 0x0},
205 {16934400, 88200, 192, 0xf, 0x1, 0x0},
206 {12000000, 88200, 136, 0xf, 0x1, 0x1},
209 static inline int get_coeff(int mclk
, int rate
)
213 for (i
= 0; i
< ARRAY_SIZE(coeff_div
); i
++) {
214 if (coeff_div
[i
].rate
== rate
&& coeff_div
[i
].mclk
== mclk
)
220 static int wm8731_hw_params(struct snd_pcm_substream
*substream
,
221 struct snd_pcm_hw_params
*params
,
222 struct snd_soc_dai
*dai
)
224 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
225 struct snd_soc_device
*socdev
= rtd
->socdev
;
226 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
227 struct wm8731_priv
*wm8731
= codec
->private_data
;
228 u16 iface
= snd_soc_read(codec
, WM8731_IFACE
) & 0xfff3;
229 int i
= get_coeff(wm8731
->sysclk
, params_rate(params
));
230 u16 srate
= (coeff_div
[i
].sr
<< 2) |
231 (coeff_div
[i
].bosr
<< 1) | coeff_div
[i
].usb
;
233 snd_soc_write(codec
, WM8731_SRATE
, srate
);
236 switch (params_format(params
)) {
237 case SNDRV_PCM_FORMAT_S16_LE
:
239 case SNDRV_PCM_FORMAT_S20_3LE
:
242 case SNDRV_PCM_FORMAT_S24_LE
:
247 snd_soc_write(codec
, WM8731_IFACE
, iface
);
251 static int wm8731_pcm_prepare(struct snd_pcm_substream
*substream
,
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
;
259 snd_soc_write(codec
, WM8731_ACTIVE
, 0x0001);
264 static void wm8731_shutdown(struct snd_pcm_substream
*substream
,
265 struct snd_soc_dai
*dai
)
267 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
268 struct snd_soc_device
*socdev
= rtd
->socdev
;
269 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
272 if (!codec
->active
) {
274 snd_soc_write(codec
, WM8731_ACTIVE
, 0x0);
278 static int wm8731_mute(struct snd_soc_dai
*dai
, int mute
)
280 struct snd_soc_codec
*codec
= dai
->codec
;
281 u16 mute_reg
= snd_soc_read(codec
, WM8731_APDIGI
) & 0xfff7;
284 snd_soc_write(codec
, WM8731_APDIGI
, mute_reg
| 0x8);
286 snd_soc_write(codec
, WM8731_APDIGI
, mute_reg
);
290 static int wm8731_set_dai_sysclk(struct snd_soc_dai
*codec_dai
,
291 int clk_id
, unsigned int freq
, int dir
)
293 struct snd_soc_codec
*codec
= codec_dai
->codec
;
294 struct wm8731_priv
*wm8731
= codec
->private_data
;
302 wm8731
->sysclk
= freq
;
309 static int wm8731_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
312 struct snd_soc_codec
*codec
= codec_dai
->codec
;
315 /* set master/slave audio interface */
316 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
317 case SND_SOC_DAIFMT_CBM_CFM
:
320 case SND_SOC_DAIFMT_CBS_CFS
:
326 /* interface format */
327 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
328 case SND_SOC_DAIFMT_I2S
:
331 case SND_SOC_DAIFMT_RIGHT_J
:
333 case SND_SOC_DAIFMT_LEFT_J
:
336 case SND_SOC_DAIFMT_DSP_A
:
339 case SND_SOC_DAIFMT_DSP_B
:
346 /* clock inversion */
347 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
348 case SND_SOC_DAIFMT_NB_NF
:
350 case SND_SOC_DAIFMT_IB_IF
:
353 case SND_SOC_DAIFMT_IB_NF
:
356 case SND_SOC_DAIFMT_NB_IF
:
364 snd_soc_write(codec
, WM8731_IFACE
, iface
);
368 static int wm8731_set_bias_level(struct snd_soc_codec
*codec
,
369 enum snd_soc_bias_level level
)
374 case SND_SOC_BIAS_ON
:
376 case SND_SOC_BIAS_PREPARE
:
378 case SND_SOC_BIAS_STANDBY
:
379 /* Clear PWROFF, gate CLKOUT, everything else as-is */
380 reg
= snd_soc_read(codec
, WM8731_PWR
) & 0xff7f;
381 snd_soc_write(codec
, WM8731_PWR
, reg
| 0x0040);
383 case SND_SOC_BIAS_OFF
:
384 snd_soc_write(codec
, WM8731_ACTIVE
, 0x0);
385 snd_soc_write(codec
, WM8731_PWR
, 0xffff);
388 codec
->bias_level
= level
;
392 #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
393 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
394 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
395 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
396 SNDRV_PCM_RATE_96000)
398 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
399 SNDRV_PCM_FMTBIT_S24_LE)
401 static struct snd_soc_dai_ops wm8731_dai_ops
= {
402 .prepare
= wm8731_pcm_prepare
,
403 .hw_params
= wm8731_hw_params
,
404 .shutdown
= wm8731_shutdown
,
405 .digital_mute
= wm8731_mute
,
406 .set_sysclk
= wm8731_set_dai_sysclk
,
407 .set_fmt
= wm8731_set_dai_fmt
,
410 struct snd_soc_dai wm8731_dai
= {
413 .stream_name
= "Playback",
416 .rates
= WM8731_RATES
,
417 .formats
= WM8731_FORMATS
,},
419 .stream_name
= "Capture",
422 .rates
= WM8731_RATES
,
423 .formats
= WM8731_FORMATS
,},
424 .ops
= &wm8731_dai_ops
,
425 .symmetric_rates
= 1,
427 EXPORT_SYMBOL_GPL(wm8731_dai
);
430 static int wm8731_suspend(struct platform_device
*pdev
, pm_message_t state
)
432 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
433 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
434 struct wm8731_priv
*wm8731
= codec
->private_data
;
436 snd_soc_write(codec
, WM8731_ACTIVE
, 0x0);
437 wm8731_set_bias_level(codec
, SND_SOC_BIAS_OFF
);
438 regulator_bulk_disable(ARRAY_SIZE(wm8731
->supplies
),
443 static int wm8731_resume(struct platform_device
*pdev
)
445 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
446 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
447 struct wm8731_priv
*wm8731
= codec
->private_data
;
450 u16
*cache
= codec
->reg_cache
;
452 ret
= regulator_bulk_enable(ARRAY_SIZE(wm8731
->supplies
),
457 /* Sync reg_cache with the hardware */
458 for (i
= 0; i
< ARRAY_SIZE(wm8731_reg
); i
++) {
459 if (cache
[i
] == wm8731_reg
[i
])
462 data
[0] = (i
<< 1) | ((cache
[i
] >> 8) & 0x0001);
463 data
[1] = cache
[i
] & 0x00ff;
464 codec
->hw_write(codec
->control_data
, data
, 2);
466 wm8731_set_bias_level(codec
, SND_SOC_BIAS_STANDBY
);
467 wm8731_set_bias_level(codec
, codec
->suspend_bias_level
);
472 #define wm8731_suspend NULL
473 #define wm8731_resume NULL
476 static int wm8731_probe(struct platform_device
*pdev
)
478 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
479 struct snd_soc_codec
*codec
;
482 if (wm8731_codec
== NULL
) {
483 dev_err(&pdev
->dev
, "Codec device not registered\n");
487 socdev
->card
->codec
= wm8731_codec
;
488 codec
= wm8731_codec
;
491 ret
= snd_soc_new_pcms(socdev
, SNDRV_DEFAULT_IDX1
, SNDRV_DEFAULT_STR1
);
493 dev_err(codec
->dev
, "failed to create pcms: %d\n", ret
);
497 snd_soc_add_controls(codec
, wm8731_snd_controls
,
498 ARRAY_SIZE(wm8731_snd_controls
));
499 wm8731_add_widgets(codec
);
507 /* power down chip */
508 static int wm8731_remove(struct platform_device
*pdev
)
510 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
512 snd_soc_free_pcms(socdev
);
513 snd_soc_dapm_free(socdev
);
518 struct snd_soc_codec_device soc_codec_dev_wm8731
= {
519 .probe
= wm8731_probe
,
520 .remove
= wm8731_remove
,
521 .suspend
= wm8731_suspend
,
522 .resume
= wm8731_resume
,
524 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731
);
526 static int wm8731_register(struct wm8731_priv
*wm8731
,
527 enum snd_soc_control_type control
)
530 struct snd_soc_codec
*codec
= &wm8731
->codec
;
533 dev_err(codec
->dev
, "Another WM8731 is registered\n");
538 mutex_init(&codec
->mutex
);
539 INIT_LIST_HEAD(&codec
->dapm_widgets
);
540 INIT_LIST_HEAD(&codec
->dapm_paths
);
542 codec
->private_data
= wm8731
;
543 codec
->name
= "WM8731";
544 codec
->owner
= THIS_MODULE
;
545 codec
->bias_level
= SND_SOC_BIAS_OFF
;
546 codec
->set_bias_level
= wm8731_set_bias_level
;
547 codec
->dai
= &wm8731_dai
;
549 codec
->reg_cache_size
= WM8731_CACHEREGNUM
;
550 codec
->reg_cache
= &wm8731
->reg_cache
;
552 memcpy(codec
->reg_cache
, wm8731_reg
, sizeof(wm8731_reg
));
554 ret
= snd_soc_codec_set_cache_io(codec
, 7, 9, control
);
556 dev_err(codec
->dev
, "Failed to set cache I/O: %d\n", ret
);
560 for (i
= 0; i
< ARRAY_SIZE(wm8731
->supplies
); i
++)
561 wm8731
->supplies
[i
].supply
= wm8731_supply_names
[i
];
563 ret
= regulator_bulk_get(codec
->dev
, ARRAY_SIZE(wm8731
->supplies
),
566 dev_err(codec
->dev
, "Failed to request supplies: %d\n", ret
);
570 ret
= regulator_bulk_enable(ARRAY_SIZE(wm8731
->supplies
),
573 dev_err(codec
->dev
, "Failed to enable supplies: %d\n", ret
);
574 goto err_regulator_get
;
577 ret
= wm8731_reset(codec
);
579 dev_err(codec
->dev
, "Failed to issue reset: %d\n", ret
);
580 goto err_regulator_enable
;
583 wm8731_dai
.dev
= codec
->dev
;
585 wm8731_set_bias_level(codec
, SND_SOC_BIAS_STANDBY
);
587 /* Latch the update bits */
588 snd_soc_update_bits(codec
, WM8731_LOUT1V
, 0x100, 0);
589 snd_soc_update_bits(codec
, WM8731_ROUT1V
, 0x100, 0);
590 snd_soc_update_bits(codec
, WM8731_LINVOL
, 0x100, 0);
591 snd_soc_update_bits(codec
, WM8731_RINVOL
, 0x100, 0);
593 /* Disable bypass path by default */
594 snd_soc_update_bits(codec
, WM8731_APANA
, 0x4, 0);
596 wm8731_codec
= codec
;
598 ret
= snd_soc_register_codec(codec
);
600 dev_err(codec
->dev
, "Failed to register codec: %d\n", ret
);
601 goto err_regulator_enable
;
604 ret
= snd_soc_register_dai(&wm8731_dai
);
606 dev_err(codec
->dev
, "Failed to register DAI: %d\n", ret
);
607 snd_soc_unregister_codec(codec
);
614 snd_soc_unregister_codec(codec
);
615 err_regulator_enable
:
616 regulator_bulk_disable(ARRAY_SIZE(wm8731
->supplies
), wm8731
->supplies
);
618 regulator_bulk_free(ARRAY_SIZE(wm8731
->supplies
), wm8731
->supplies
);
624 static void wm8731_unregister(struct wm8731_priv
*wm8731
)
626 wm8731_set_bias_level(&wm8731
->codec
, SND_SOC_BIAS_OFF
);
627 snd_soc_unregister_dai(&wm8731_dai
);
628 snd_soc_unregister_codec(&wm8731
->codec
);
629 regulator_bulk_disable(ARRAY_SIZE(wm8731
->supplies
), wm8731
->supplies
);
630 regulator_bulk_free(ARRAY_SIZE(wm8731
->supplies
), wm8731
->supplies
);
635 #if defined(CONFIG_SPI_MASTER)
636 static int __devinit
wm8731_spi_probe(struct spi_device
*spi
)
638 struct snd_soc_codec
*codec
;
639 struct wm8731_priv
*wm8731
;
641 wm8731
= kzalloc(sizeof(struct wm8731_priv
), GFP_KERNEL
);
645 codec
= &wm8731
->codec
;
646 codec
->control_data
= spi
;
647 codec
->dev
= &spi
->dev
;
649 dev_set_drvdata(&spi
->dev
, wm8731
);
651 return wm8731_register(wm8731
, SND_SOC_SPI
);
654 static int __devexit
wm8731_spi_remove(struct spi_device
*spi
)
656 struct wm8731_priv
*wm8731
= dev_get_drvdata(&spi
->dev
);
658 wm8731_unregister(wm8731
);
663 static struct spi_driver wm8731_spi_driver
= {
666 .bus
= &spi_bus_type
,
667 .owner
= THIS_MODULE
,
669 .probe
= wm8731_spi_probe
,
670 .remove
= __devexit_p(wm8731_spi_remove
),
672 #endif /* CONFIG_SPI_MASTER */
674 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
675 static __devinit
int wm8731_i2c_probe(struct i2c_client
*i2c
,
676 const struct i2c_device_id
*id
)
678 struct wm8731_priv
*wm8731
;
679 struct snd_soc_codec
*codec
;
681 wm8731
= kzalloc(sizeof(struct wm8731_priv
), GFP_KERNEL
);
685 codec
= &wm8731
->codec
;
687 i2c_set_clientdata(i2c
, wm8731
);
688 codec
->control_data
= i2c
;
690 codec
->dev
= &i2c
->dev
;
692 return wm8731_register(wm8731
, SND_SOC_I2C
);
695 static __devexit
int wm8731_i2c_remove(struct i2c_client
*client
)
697 struct wm8731_priv
*wm8731
= i2c_get_clientdata(client
);
698 wm8731_unregister(wm8731
);
702 static const struct i2c_device_id wm8731_i2c_id
[] = {
706 MODULE_DEVICE_TABLE(i2c
, wm8731_i2c_id
);
708 static struct i2c_driver wm8731_i2c_driver
= {
710 .name
= "WM8731 I2C Codec",
711 .owner
= THIS_MODULE
,
713 .probe
= wm8731_i2c_probe
,
714 .remove
= __devexit_p(wm8731_i2c_remove
),
715 .id_table
= wm8731_i2c_id
,
719 static int __init
wm8731_modinit(void)
722 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
723 ret
= i2c_add_driver(&wm8731_i2c_driver
);
725 printk(KERN_ERR
"Failed to register WM8731 I2C driver: %d\n",
729 #if defined(CONFIG_SPI_MASTER)
730 ret
= spi_register_driver(&wm8731_spi_driver
);
732 printk(KERN_ERR
"Failed to register WM8731 SPI driver: %d\n",
738 module_init(wm8731_modinit
);
740 static void __exit
wm8731_exit(void)
742 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
743 i2c_del_driver(&wm8731_i2c_driver
);
745 #if defined(CONFIG_SPI_MASTER)
746 spi_unregister_driver(&wm8731_spi_driver
);
749 module_exit(wm8731_exit
);
751 MODULE_DESCRIPTION("ASoC WM8731 driver");
752 MODULE_AUTHOR("Richard Purdie");
753 MODULE_LICENSE("GPL");