1 /*
2 * ak4535.c -- AK4535 ALSA Soc Audio driver
3 *
4 * Copyright 2005 Openedhand Ltd.
5 *
6 * Author: Richard Purdie <richard@openedhand.com>
7 *
8 * Based on wm8753.c by Liam Girdwood
9 *
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.
13 */
14
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/pm.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.h>
22 #include <linux/slab.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/initval.h>
28
29 #include "ak4535.h"
30
31 #define AK4535_VERSION "0.3"
32
33 /* codec private data */
34 struct ak4535_priv {
35 unsigned int sysclk;
36 enum snd_soc_control_type control_type;
37 void *control_data;
38 };
39
40 /*
41 * ak4535 register cache
42 */
43 static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
44 0x0000, 0x0080, 0x0000, 0x0003,
45 0x0002, 0x0000, 0x0011, 0x0001,
46 0x0000, 0x0040, 0x0036, 0x0010,
47 0x0000, 0x0000, 0x0057, 0x0000,
48 };
49
50 /*
51 * read ak4535 register cache
52 */
ak4535_read_reg_cache(struct snd_soc_codec * codec,unsigned int reg)53 static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
54 unsigned int reg)
55 {
56 u16 *cache = codec->reg_cache;
57 if (reg >= AK4535_CACHEREGNUM)
58 return -1;
59 return cache[reg];
60 }
61
62 /*
63 * write ak4535 register cache
64 */
ak4535_write_reg_cache(struct snd_soc_codec * codec,u16 reg,unsigned int value)65 static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
66 u16 reg, unsigned int value)
67 {
68 u16 *cache = codec->reg_cache;
69 if (reg >= AK4535_CACHEREGNUM)
70 return;
71 cache[reg] = value;
72 }
73
74 /*
75 * write to the AK4535 register space
76 */
ak4535_write(struct snd_soc_codec * codec,unsigned int reg,unsigned int value)77 static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
78 unsigned int value)
79 {
80 u8 data[2];
81
82 /* data is
83 * D15..D8 AK4535 register offset
84 * D7...D0 register data
85 */
86 data[0] = reg & 0xff;
87 data[1] = value & 0xff;
88
89 ak4535_write_reg_cache(codec, reg, value);
90 if (codec->hw_write(codec->control_data, data, 2) == 2)
91 return 0;
92 else
93 return -EIO;
94 }
95
ak4535_sync(struct snd_soc_codec * codec)96 static int ak4535_sync(struct snd_soc_codec *codec)
97 {
98 u16 *cache = codec->reg_cache;
99 int i, r = 0;
100
101 for (i = 0; i < AK4535_CACHEREGNUM; i++)
102 r |= ak4535_write(codec, i, cache[i]);
103
104 return r;
105 };
106
107 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
108 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
109 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
110 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
111 static const char *ak4535_mic_select[] = {"Internal", "External"};
112
113 static const struct soc_enum ak4535_enum[] = {
114 SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
115 SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
116 SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
117 SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
118 SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
119 };
120
121 static const struct snd_kcontrol_new ak4535_snd_controls[] = {
122 SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
123 SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
124 SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
125 SOC_ENUM("Headphone Output", ak4535_enum[2]),
126 SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
127 SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
128 SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
129 SOC_ENUM("Mic Select", ak4535_enum[4]),
130 SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
131 SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
132 SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
133 SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
134 SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
135 SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
136 SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
137 SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
138 SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
139 SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
140 SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
141 };
142
143 /* Mono 1 Mixer */
144 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
145 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
146 SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
147 };
148
149 /* Stereo Mixer */
150 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
151 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
152 SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
153 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
154 };
155
156 /* Input Mixer */
157 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
158 SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
159 SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
160 };
161
162 /* Input mux */
163 static const struct snd_kcontrol_new ak4535_input_mux_control =
164 SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
165
166 /* HP L switch */
167 static const struct snd_kcontrol_new ak4535_hpl_control =
168 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
169
170 /* HP R switch */
171 static const struct snd_kcontrol_new ak4535_hpr_control =
172 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
173
174 /* mono 2 switch */
175 static const struct snd_kcontrol_new ak4535_mono2_control =
176 SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
177
178 /* Line out switch */
179 static const struct snd_kcontrol_new ak4535_line_control =
180 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
181
182 /* ak4535 dapm widgets */
183 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
184 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
185 &ak4535_stereo_mixer_controls[0],
186 ARRAY_SIZE(ak4535_stereo_mixer_controls)),
187 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
188 &ak4535_mono1_mixer_controls[0],
189 ARRAY_SIZE(ak4535_mono1_mixer_controls)),
190 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
191 &ak4535_input_mixer_controls[0],
192 ARRAY_SIZE(ak4535_input_mixer_controls)),
193 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
194 &ak4535_input_mux_control),
195 SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
196 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
197 &ak4535_mono2_control),
198 /* speaker powersave bit */
199 SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
200 SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
201 &ak4535_line_control),
202 SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
203 &ak4535_hpl_control),
204 SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
205 &ak4535_hpr_control),
206 SND_SOC_DAPM_OUTPUT("LOUT"),
207 SND_SOC_DAPM_OUTPUT("HPL"),
208 SND_SOC_DAPM_OUTPUT("ROUT"),
209 SND_SOC_DAPM_OUTPUT("HPR"),
210 SND_SOC_DAPM_OUTPUT("SPP"),
211 SND_SOC_DAPM_OUTPUT("SPN"),
212 SND_SOC_DAPM_OUTPUT("MOUT1"),
213 SND_SOC_DAPM_OUTPUT("MOUT2"),
214 SND_SOC_DAPM_OUTPUT("MICOUT"),
215 SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
216 SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
217 SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
218 SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
219 SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
220 SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
221 SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
222 SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
223
224 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
225 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
226 SND_SOC_DAPM_INPUT("MICIN"),
227 SND_SOC_DAPM_INPUT("MICEXT"),
228 SND_SOC_DAPM_INPUT("AUX"),
229 SND_SOC_DAPM_INPUT("MIN"),
230 SND_SOC_DAPM_INPUT("AIN"),
231 };
232
233 static const struct snd_soc_dapm_route audio_map[] = {
234 /*stereo mixer */
235 {"Stereo Mixer", "Playback Switch", "DAC"},
236 {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
237 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
238
239 /* mono1 mixer */
240 {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
241 {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
242
243 /* Mic */
244 {"Mic", NULL, "AIN"},
245 {"Input Mux", "Internal", "Mic Int Bias"},
246 {"Input Mux", "External", "Mic Ext Bias"},
247 {"Mic Int Bias", NULL, "MICIN"},
248 {"Mic Ext Bias", NULL, "MICEXT"},
249 {"MICOUT", NULL, "Input Mux"},
250
251 /* line out */
252 {"LOUT", NULL, "Line Out Enable"},
253 {"ROUT", NULL, "Line Out Enable"},
254 {"Line Out Enable", "Switch", "Line Out"},
255 {"Line Out", NULL, "Stereo Mixer"},
256
257 /* mono1 out */
258 {"MOUT1", NULL, "Mono Out"},
259 {"Mono Out", NULL, "Mono1 Mixer"},
260
261 /* left HP */
262 {"HPL", NULL, "Left HP Enable"},
263 {"Left HP Enable", "Switch", "HP L Amp"},
264 {"HP L Amp", NULL, "Stereo Mixer"},
265
266 /* right HP */
267 {"HPR", NULL, "Right HP Enable"},
268 {"Right HP Enable", "Switch", "HP R Amp"},
269 {"HP R Amp", NULL, "Stereo Mixer"},
270
271 /* speaker */
272 {"SPP", NULL, "Speaker Enable"},
273 {"SPN", NULL, "Speaker Enable"},
274 {"Speaker Enable", "Switch", "Spk Amp"},
275 {"Spk Amp", NULL, "MIN"},
276
277 /* mono 2 */
278 {"MOUT2", NULL, "Mono 2 Enable"},
279 {"Mono 2 Enable", "Switch", "Stereo Mixer"},
280
281 /* Aux In */
282 {"Aux In", NULL, "AUX"},
283
284 /* ADC */
285 {"ADC", NULL, "Input Mixer"},
286 {"Input Mixer", "Mic Capture Switch", "Mic"},
287 {"Input Mixer", "Aux Capture Switch", "Aux In"},
288 };
289
ak4535_add_widgets(struct snd_soc_codec * codec)290 static int ak4535_add_widgets(struct snd_soc_codec *codec)
291 {
292 struct snd_soc_dapm_context *dapm = &codec->dapm;
293
294 snd_soc_dapm_new_controls(dapm, ak4535_dapm_widgets,
295 ARRAY_SIZE(ak4535_dapm_widgets));
296 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
297
298 return 0;
299 }
300
ak4535_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)301 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
302 int clk_id, unsigned int freq, int dir)
303 {
304 struct snd_soc_codec *codec = codec_dai->codec;
305 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
306
307 ak4535->sysclk = freq;
308 return 0;
309 }
310
ak4535_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)311 static int ak4535_hw_params(struct snd_pcm_substream *substream,
312 struct snd_pcm_hw_params *params,
313 struct snd_soc_dai *dai)
314 {
315 struct snd_soc_pcm_runtime *rtd = substream->private_data;
316 struct snd_soc_codec *codec = rtd->codec;
317 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
318 u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
319 int rate = params_rate(params), fs = 256;
320
321 if (rate)
322 fs = ak4535->sysclk / rate;
323
324 /* set fs */
325 switch (fs) {
326 case 1024:
327 mode2 |= (0x2 << 5);
328 break;
329 case 512:
330 mode2 |= (0x1 << 5);
331 break;
332 case 256:
333 break;
334 }
335
336 /* set rate */
337 ak4535_write(codec, AK4535_MODE2, mode2);
338 return 0;
339 }
340
ak4535_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)341 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
342 unsigned int fmt)
343 {
344 struct snd_soc_codec *codec = codec_dai->codec;
345 u8 mode1 = 0;
346
347 /* interface format */
348 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
349 case SND_SOC_DAIFMT_I2S:
350 mode1 = 0x0002;
351 break;
352 case SND_SOC_DAIFMT_LEFT_J:
353 mode1 = 0x0001;
354 break;
355 default:
356 return -EINVAL;
357 }
358
359 /* use 32 fs for BCLK to save power */
360 mode1 |= 0x4;
361
362 ak4535_write(codec, AK4535_MODE1, mode1);
363 return 0;
364 }
365
ak4535_mute(struct snd_soc_dai * dai,int mute)366 static int ak4535_mute(struct snd_soc_dai *dai, int mute)
367 {
368 struct snd_soc_codec *codec = dai->codec;
369 u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
370 if (!mute)
371 ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
372 else
373 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
374 return 0;
375 }
376
ak4535_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)377 static int ak4535_set_bias_level(struct snd_soc_codec *codec,
378 enum snd_soc_bias_level level)
379 {
380 u16 i, mute_reg;
381
382 switch (level) {
383 case SND_SOC_BIAS_ON:
384 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
385 ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
386 break;
387 case SND_SOC_BIAS_PREPARE:
388 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
389 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
390 break;
391 case SND_SOC_BIAS_STANDBY:
392 i = ak4535_read_reg_cache(codec, AK4535_PM1);
393 ak4535_write(codec, AK4535_PM1, i | 0x80);
394 i = ak4535_read_reg_cache(codec, AK4535_PM2);
395 ak4535_write(codec, AK4535_PM2, i & (~0x80));
396 break;
397 case SND_SOC_BIAS_OFF:
398 i = ak4535_read_reg_cache(codec, AK4535_PM1);
399 ak4535_write(codec, AK4535_PM1, i & (~0x80));
400 break;
401 }
402 codec->dapm.bias_level = level;
403 return 0;
404 }
405
406 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
407 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
408 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
409
410 static struct snd_soc_dai_ops ak4535_dai_ops = {
411 .hw_params = ak4535_hw_params,
412 .set_fmt = ak4535_set_dai_fmt,
413 .digital_mute = ak4535_mute,
414 .set_sysclk = ak4535_set_dai_sysclk,
415 };
416
417 static struct snd_soc_dai_driver ak4535_dai = {
418 .name = "ak4535-hifi",
419 .playback = {
420 .stream_name = "Playback",
421 .channels_min = 1,
422 .channels_max = 2,
423 .rates = AK4535_RATES,
424 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
425 .capture = {
426 .stream_name = "Capture",
427 .channels_min = 1,
428 .channels_max = 2,
429 .rates = AK4535_RATES,
430 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
431 .ops = &ak4535_dai_ops,
432 };
433
ak4535_suspend(struct snd_soc_codec * codec,pm_message_t state)434 static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state)
435 {
436 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
437 return 0;
438 }
439
ak4535_resume(struct snd_soc_codec * codec)440 static int ak4535_resume(struct snd_soc_codec *codec)
441 {
442 ak4535_sync(codec);
443 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
444 return 0;
445 }
446
ak4535_probe(struct snd_soc_codec * codec)447 static int ak4535_probe(struct snd_soc_codec *codec)
448 {
449 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
450
451 printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
452
453 codec->control_data = ak4535->control_data;
454
455 /* power on device */
456 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
457
458 snd_soc_add_controls(codec, ak4535_snd_controls,
459 ARRAY_SIZE(ak4535_snd_controls));
460 ak4535_add_widgets(codec);
461
462 return 0;
463 }
464
465 /* power down chip */
ak4535_remove(struct snd_soc_codec * codec)466 static int ak4535_remove(struct snd_soc_codec *codec)
467 {
468 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
469 return 0;
470 }
471
472 static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
473 .probe = ak4535_probe,
474 .remove = ak4535_remove,
475 .suspend = ak4535_suspend,
476 .resume = ak4535_resume,
477 .read = ak4535_read_reg_cache,
478 .write = ak4535_write,
479 .set_bias_level = ak4535_set_bias_level,
480 .reg_cache_size = ARRAY_SIZE(ak4535_reg),
481 .reg_word_size = sizeof(u8),
482 .reg_cache_default = ak4535_reg,
483 };
484
485 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ak4535_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)486 static __devinit int ak4535_i2c_probe(struct i2c_client *i2c,
487 const struct i2c_device_id *id)
488 {
489 struct ak4535_priv *ak4535;
490 int ret;
491
492 ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
493 if (ak4535 == NULL)
494 return -ENOMEM;
495
496 i2c_set_clientdata(i2c, ak4535);
497 ak4535->control_data = i2c;
498 ak4535->control_type = SND_SOC_I2C;
499
500 ret = snd_soc_register_codec(&i2c->dev,
501 &soc_codec_dev_ak4535, &ak4535_dai, 1);
502 if (ret < 0)
503 kfree(ak4535);
504 return ret;
505 }
506
ak4535_i2c_remove(struct i2c_client * client)507 static __devexit int ak4535_i2c_remove(struct i2c_client *client)
508 {
509 snd_soc_unregister_codec(&client->dev);
510 kfree(i2c_get_clientdata(client));
511 return 0;
512 }
513
514 static const struct i2c_device_id ak4535_i2c_id[] = {
515 { "ak4535", 0 },
516 { }
517 };
518 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
519
520 static struct i2c_driver ak4535_i2c_driver = {
521 .driver = {
522 .name = "ak4535-codec",
523 .owner = THIS_MODULE,
524 },
525 .probe = ak4535_i2c_probe,
526 .remove = __devexit_p(ak4535_i2c_remove),
527 .id_table = ak4535_i2c_id,
528 };
529 #endif
530
ak4535_modinit(void)531 static int __init ak4535_modinit(void)
532 {
533 int ret = 0;
534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
535 ret = i2c_add_driver(&ak4535_i2c_driver);
536 if (ret != 0) {
537 printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n",
538 ret);
539 }
540 #endif
541 return ret;
542 }
543 module_init(ak4535_modinit);
544
ak4535_exit(void)545 static void __exit ak4535_exit(void)
546 {
547 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
548 i2c_del_driver(&ak4535_i2c_driver);
549 #endif
550 }
551 module_exit(ak4535_exit);
552
553 MODULE_DESCRIPTION("Soc AK4535 driver");
554 MODULE_AUTHOR("Richard Purdie");
555 MODULE_LICENSE("GPL");
556