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Commit | Line | Data |
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d8e3bb73 GL |
1 | /* |
2 | * Texas Instruments TLV320AIC26 low power audio CODEC | |
3 | * ALSA SoC CODEC driver | |
4 | * | |
5 | * Copyright (C) 2008 Secret Lab Technologies Ltd. | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/moduleparam.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/pm.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/sysfs.h> | |
15 | #include <linux/spi/spi.h> | |
16 | #include <sound/core.h> | |
17 | #include <sound/pcm.h> | |
18 | #include <sound/pcm_params.h> | |
19 | #include <sound/soc.h> | |
20 | #include <sound/soc-dapm.h> | |
21 | #include <sound/soc-of-simple.h> | |
22 | #include <sound/initval.h> | |
23 | ||
24 | #include "tlv320aic26.h" | |
25 | ||
26 | MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver"); | |
27 | MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); | |
28 | MODULE_LICENSE("GPL"); | |
29 | ||
30 | /* AIC26 driver private data */ | |
31 | struct aic26 { | |
32 | struct spi_device *spi; | |
33 | struct snd_soc_codec codec; | |
34 | u16 reg_cache[AIC26_NUM_REGS]; /* shadow registers */ | |
35 | int master; | |
36 | int datfm; | |
37 | int mclk; | |
38 | ||
39 | /* Keyclick parameters */ | |
40 | int keyclick_amplitude; | |
41 | int keyclick_freq; | |
42 | int keyclick_len; | |
43 | }; | |
44 | ||
45 | /* --------------------------------------------------------------------- | |
46 | * Register access routines | |
47 | */ | |
48 | static unsigned int aic26_reg_read(struct snd_soc_codec *codec, | |
49 | unsigned int reg) | |
50 | { | |
51 | struct aic26 *aic26 = codec->private_data; | |
52 | u16 *cache = codec->reg_cache; | |
53 | u16 cmd, value; | |
54 | u8 buffer[2]; | |
55 | int rc; | |
56 | ||
57 | if (reg >= AIC26_NUM_REGS) { | |
58 | WARN_ON_ONCE(1); | |
59 | return 0; | |
60 | } | |
61 | ||
62 | /* Do SPI transfer; first 16bits are command; remaining is | |
63 | * register contents */ | |
64 | cmd = AIC26_READ_COMMAND_WORD(reg); | |
65 | buffer[0] = (cmd >> 8) & 0xff; | |
66 | buffer[1] = cmd & 0xff; | |
67 | rc = spi_write_then_read(aic26->spi, buffer, 2, buffer, 2); | |
68 | if (rc) { | |
69 | dev_err(&aic26->spi->dev, "AIC26 reg read error\n"); | |
70 | return -EIO; | |
71 | } | |
72 | value = (buffer[0] << 8) | buffer[1]; | |
73 | ||
74 | /* Update the cache before returning with the value */ | |
75 | cache[reg] = value; | |
76 | return value; | |
77 | } | |
78 | ||
79 | static unsigned int aic26_reg_read_cache(struct snd_soc_codec *codec, | |
80 | unsigned int reg) | |
81 | { | |
82 | u16 *cache = codec->reg_cache; | |
83 | ||
84 | if (reg >= AIC26_NUM_REGS) { | |
85 | WARN_ON_ONCE(1); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | return cache[reg]; | |
90 | } | |
91 | ||
92 | static int aic26_reg_write(struct snd_soc_codec *codec, unsigned int reg, | |
93 | unsigned int value) | |
94 | { | |
95 | struct aic26 *aic26 = codec->private_data; | |
96 | u16 *cache = codec->reg_cache; | |
97 | u16 cmd; | |
98 | u8 buffer[4]; | |
99 | int rc; | |
100 | ||
101 | if (reg >= AIC26_NUM_REGS) { | |
102 | WARN_ON_ONCE(1); | |
103 | return -EINVAL; | |
104 | } | |
105 | ||
106 | /* Do SPI transfer; first 16bits are command; remaining is data | |
107 | * to write into register */ | |
108 | cmd = AIC26_WRITE_COMMAND_WORD(reg); | |
109 | buffer[0] = (cmd >> 8) & 0xff; | |
110 | buffer[1] = cmd & 0xff; | |
111 | buffer[2] = value >> 8; | |
112 | buffer[3] = value; | |
113 | rc = spi_write(aic26->spi, buffer, 4); | |
114 | if (rc) { | |
115 | dev_err(&aic26->spi->dev, "AIC26 reg read error\n"); | |
116 | return -EIO; | |
117 | } | |
118 | ||
119 | /* update cache before returning */ | |
120 | cache[reg] = value; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | /* --------------------------------------------------------------------- | |
125 | * Digital Audio Interface Operations | |
126 | */ | |
127 | static int aic26_hw_params(struct snd_pcm_substream *substream, | |
128 | struct snd_pcm_hw_params *params) | |
129 | { | |
130 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
131 | struct snd_soc_device *socdev = rtd->socdev; | |
132 | struct snd_soc_codec *codec = socdev->codec; | |
133 | struct aic26 *aic26 = codec->private_data; | |
134 | int fsref, divisor, wlen, pval, jval, dval, qval; | |
135 | u16 reg; | |
136 | ||
137 | dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n", | |
138 | substream, params); | |
139 | dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params), | |
140 | params_format(params)); | |
141 | ||
142 | switch (params_rate(params)) { | |
143 | case 8000: fsref = 48000; divisor = AIC26_DIV_6; break; | |
144 | case 11025: fsref = 44100; divisor = AIC26_DIV_4; break; | |
145 | case 12000: fsref = 48000; divisor = AIC26_DIV_4; break; | |
146 | case 16000: fsref = 48000; divisor = AIC26_DIV_3; break; | |
147 | case 22050: fsref = 44100; divisor = AIC26_DIV_2; break; | |
148 | case 24000: fsref = 48000; divisor = AIC26_DIV_2; break; | |
149 | case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break; | |
150 | case 44100: fsref = 44100; divisor = AIC26_DIV_1; break; | |
151 | case 48000: fsref = 48000; divisor = AIC26_DIV_1; break; | |
152 | default: | |
153 | dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL; | |
154 | } | |
155 | ||
156 | /* select data word length */ | |
157 | switch (params_format(params)) { | |
158 | case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break; | |
159 | case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break; | |
160 | case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break; | |
161 | case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break; | |
162 | default: | |
163 | dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; | |
164 | } | |
165 | ||
166 | /* Configure PLL */ | |
167 | pval = 1; | |
168 | jval = (fsref == 44100) ? 7 : 8; | |
169 | dval = (fsref == 44100) ? 5264 : 1920; | |
170 | qval = 0; | |
171 | reg = 0x8000 | qval << 11 | pval << 8 | jval << 2; | |
172 | aic26_reg_write(codec, AIC26_REG_PLL_PROG1, reg); | |
173 | reg = dval << 2; | |
174 | aic26_reg_write(codec, AIC26_REG_PLL_PROG2, reg); | |
175 | ||
176 | /* Audio Control 3 (master mode, fsref rate) */ | |
177 | reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL3); | |
178 | reg &= ~0xf800; | |
179 | if (aic26->master) | |
180 | reg |= 0x0800; | |
181 | if (fsref == 48000) | |
182 | reg |= 0x2000; | |
183 | aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL3, reg); | |
184 | ||
185 | /* Audio Control 1 (FSref divisor) */ | |
186 | reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL1); | |
187 | reg &= ~0x0fff; | |
188 | reg |= wlen | aic26->datfm | (divisor << 3) | divisor; | |
189 | aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL1, reg); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | /** | |
195 | * aic26_mute - Mute control to reduce noise when changing audio format | |
196 | */ | |
197 | static int aic26_mute(struct snd_soc_dai *dai, int mute) | |
198 | { | |
199 | struct snd_soc_codec *codec = dai->codec; | |
200 | struct aic26 *aic26 = codec->private_data; | |
201 | u16 reg = aic26_reg_read_cache(codec, AIC26_REG_DAC_GAIN); | |
202 | ||
203 | dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n", | |
204 | dai, mute); | |
205 | ||
206 | if (mute) | |
207 | reg |= 0x8080; | |
208 | else | |
209 | reg &= ~0x8080; | |
210 | aic26_reg_write(codec, AIC26_REG_DAC_GAIN, reg); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int aic26_set_sysclk(struct snd_soc_dai *codec_dai, | |
216 | int clk_id, unsigned int freq, int dir) | |
217 | { | |
218 | struct snd_soc_codec *codec = codec_dai->codec; | |
219 | struct aic26 *aic26 = codec->private_data; | |
220 | ||
221 | dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i," | |
222 | " freq=%i, dir=%i)\n", | |
223 | codec_dai, clk_id, freq, dir); | |
224 | ||
225 | /* MCLK needs to fall between 2MHz and 50 MHz */ | |
226 | if ((freq < 2000000) || (freq > 50000000)) | |
227 | return -EINVAL; | |
228 | ||
229 | aic26->mclk = freq; | |
230 | return 0; | |
231 | } | |
232 | ||
233 | static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) | |
234 | { | |
235 | struct snd_soc_codec *codec = codec_dai->codec; | |
236 | struct aic26 *aic26 = codec->private_data; | |
237 | ||
238 | dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n", | |
239 | codec_dai, fmt); | |
240 | ||
241 | /* set master/slave audio interface */ | |
242 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
243 | case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break; | |
244 | case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break; | |
245 | default: | |
246 | dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL; | |
247 | } | |
248 | ||
249 | /* interface format */ | |
250 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
251 | case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break; | |
252 | case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break; | |
253 | case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break; | |
254 | case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break; | |
255 | default: | |
256 | dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; | |
257 | } | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | /* --------------------------------------------------------------------- | |
263 | * Digital Audio Interface Definition | |
264 | */ | |
265 | #define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ | |
266 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ | |
267 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ | |
268 | SNDRV_PCM_RATE_48000) | |
269 | #define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\ | |
270 | SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) | |
271 | ||
272 | struct snd_soc_dai aic26_dai = { | |
273 | .name = "tlv320aic26", | |
274 | .playback = { | |
275 | .stream_name = "Playback", | |
276 | .channels_min = 2, | |
277 | .channels_max = 2, | |
278 | .rates = AIC26_RATES, | |
279 | .formats = AIC26_FORMATS, | |
280 | }, | |
281 | .capture = { | |
282 | .stream_name = "Capture", | |
283 | .channels_min = 2, | |
284 | .channels_max = 2, | |
285 | .rates = AIC26_RATES, | |
286 | .formats = AIC26_FORMATS, | |
287 | }, | |
288 | .ops = { | |
289 | .hw_params = aic26_hw_params, | |
290 | }, | |
291 | .dai_ops = { | |
292 | .digital_mute = aic26_mute, | |
293 | .set_sysclk = aic26_set_sysclk, | |
294 | .set_fmt = aic26_set_fmt, | |
295 | }, | |
296 | }; | |
297 | EXPORT_SYMBOL_GPL(aic26_dai); | |
298 | ||
299 | /* --------------------------------------------------------------------- | |
300 | * ALSA controls | |
301 | */ | |
302 | static const char *aic26_capture_src_text[] = {"Mic", "Aux"}; | |
303 | static const struct soc_enum aic26_capture_src_enum = | |
304 | SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12, 2, aic26_capture_src_text); | |
305 | ||
306 | static const struct snd_kcontrol_new aic26_snd_controls[] = { | |
307 | /* Output */ | |
308 | SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1), | |
309 | SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1), | |
310 | SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0), | |
311 | SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1), | |
312 | SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0), | |
313 | SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0), | |
314 | SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0), | |
315 | SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0), | |
316 | SOC_ENUM("Capture Source", aic26_capture_src_enum), | |
317 | }; | |
318 | ||
319 | /* --------------------------------------------------------------------- | |
320 | * SoC CODEC portion of driver: probe and release routines | |
321 | */ | |
322 | static int aic26_probe(struct platform_device *pdev) | |
323 | { | |
324 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
325 | struct snd_soc_codec *codec; | |
326 | struct snd_kcontrol *kcontrol; | |
327 | struct aic26 *aic26; | |
328 | int i, ret, err; | |
329 | ||
330 | dev_info(&pdev->dev, "Probing AIC26 SoC CODEC driver\n"); | |
331 | dev_dbg(&pdev->dev, "socdev=%p\n", socdev); | |
332 | dev_dbg(&pdev->dev, "codec_data=%p\n", socdev->codec_data); | |
333 | ||
334 | /* Fetch the relevant aic26 private data here (it's already been | |
335 | * stored in the .codec pointer) */ | |
336 | aic26 = socdev->codec_data; | |
337 | if (aic26 == NULL) { | |
338 | dev_err(&pdev->dev, "aic26: missing codec pointer\n"); | |
339 | return -ENODEV; | |
340 | } | |
341 | codec = &aic26->codec; | |
342 | socdev->codec = codec; | |
343 | ||
344 | dev_dbg(&pdev->dev, "Registering PCMs, dev=%p, socdev->dev=%p\n", | |
345 | &pdev->dev, socdev->dev); | |
346 | /* register pcms */ | |
347 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
348 | if (ret < 0) { | |
349 | dev_err(&pdev->dev, "aic26: failed to create pcms\n"); | |
350 | return -ENODEV; | |
351 | } | |
352 | ||
353 | /* register controls */ | |
354 | dev_dbg(&pdev->dev, "Registering controls\n"); | |
355 | for (i = 0; i < ARRAY_SIZE(aic26_snd_controls); i++) { | |
356 | kcontrol = snd_soc_cnew(&aic26_snd_controls[i], codec, NULL); | |
357 | err = snd_ctl_add(codec->card, kcontrol); | |
358 | WARN_ON(err < 0); | |
359 | } | |
360 | ||
361 | /* CODEC is setup, we can register the card now */ | |
362 | dev_dbg(&pdev->dev, "Registering card\n"); | |
363 | ret = snd_soc_register_card(socdev); | |
364 | if (ret < 0) { | |
365 | dev_err(&pdev->dev, "aic26: failed to register card\n"); | |
366 | goto card_err; | |
367 | } | |
368 | return 0; | |
369 | ||
370 | card_err: | |
371 | snd_soc_free_pcms(socdev); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | static int aic26_remove(struct platform_device *pdev) | |
376 | { | |
377 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
378 | snd_soc_free_pcms(socdev); | |
379 | return 0; | |
380 | } | |
381 | ||
382 | struct snd_soc_codec_device aic26_soc_codec_dev = { | |
383 | .probe = aic26_probe, | |
384 | .remove = aic26_remove, | |
385 | }; | |
ecb0b3f6 | 386 | EXPORT_SYMBOL_GPL(aic26_soc_codec_dev); |
d8e3bb73 GL |
387 | |
388 | /* --------------------------------------------------------------------- | |
389 | * SPI device portion of driver: sysfs files for debugging | |
390 | */ | |
391 | ||
392 | static ssize_t aic26_keyclick_show(struct device *dev, | |
393 | struct device_attribute *attr, char *buf) | |
394 | { | |
395 | struct aic26 *aic26 = dev_get_drvdata(dev); | |
396 | int val, amp, freq, len; | |
397 | ||
398 | val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2); | |
399 | amp = (val >> 12) & 0x7; | |
400 | freq = (125 << ((val >> 8) & 0x7)) >> 1; | |
401 | len = 2 * (1 + ((val >> 4) & 0xf)); | |
402 | ||
403 | return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len); | |
404 | } | |
405 | ||
406 | /* Any write to the keyclick attribute will trigger the keyclick event */ | |
407 | static ssize_t aic26_keyclick_set(struct device *dev, | |
408 | struct device_attribute *attr, | |
409 | const char *buf, size_t count) | |
410 | { | |
411 | struct aic26 *aic26 = dev_get_drvdata(dev); | |
412 | int val; | |
413 | ||
414 | val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2); | |
415 | val |= 0x8000; | |
416 | aic26_reg_write(&aic26->codec, AIC26_REG_AUDIO_CTRL2, val); | |
417 | ||
418 | return count; | |
419 | } | |
420 | ||
421 | DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set); | |
422 | ||
423 | /* --------------------------------------------------------------------- | |
424 | * SPI device portion of driver: probe and release routines and SPI | |
425 | * driver registration. | |
426 | */ | |
427 | static int aic26_spi_probe(struct spi_device *spi) | |
428 | { | |
429 | struct aic26 *aic26; | |
430 | int rc, i, reg; | |
431 | ||
432 | dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n"); | |
433 | ||
434 | /* Allocate driver data */ | |
435 | aic26 = kzalloc(sizeof *aic26, GFP_KERNEL); | |
436 | if (!aic26) | |
437 | return -ENOMEM; | |
438 | ||
439 | /* Initialize the driver data */ | |
440 | aic26->spi = spi; | |
441 | dev_set_drvdata(&spi->dev, aic26); | |
442 | ||
443 | /* Setup what we can in the codec structure so that the register | |
444 | * access functions will work as expected. More will be filled | |
445 | * out when it is probed by the SoC CODEC part of this driver */ | |
446 | aic26->codec.private_data = aic26; | |
447 | aic26->codec.name = "aic26"; | |
448 | aic26->codec.owner = THIS_MODULE; | |
449 | aic26->codec.dai = &aic26_dai; | |
450 | aic26->codec.num_dai = 1; | |
451 | aic26->codec.read = aic26_reg_read; | |
452 | aic26->codec.write = aic26_reg_write; | |
453 | aic26->master = 1; | |
454 | mutex_init(&aic26->codec.mutex); | |
455 | INIT_LIST_HEAD(&aic26->codec.dapm_widgets); | |
456 | INIT_LIST_HEAD(&aic26->codec.dapm_paths); | |
457 | aic26->codec.reg_cache_size = AIC26_NUM_REGS; | |
458 | aic26->codec.reg_cache = aic26->reg_cache; | |
459 | ||
460 | /* Reset the codec to power on defaults */ | |
461 | aic26_reg_write(&aic26->codec, AIC26_REG_RESET, 0xBB00); | |
462 | ||
463 | /* Power up CODEC */ | |
464 | aic26_reg_write(&aic26->codec, AIC26_REG_POWER_CTRL, 0); | |
465 | ||
466 | /* Audio Control 3 (master mode, fsref rate) */ | |
467 | reg = aic26_reg_read(&aic26->codec, AIC26_REG_AUDIO_CTRL3); | |
468 | reg &= ~0xf800; | |
469 | reg |= 0x0800; /* set master mode */ | |
470 | aic26_reg_write(&aic26->codec, AIC26_REG_AUDIO_CTRL3, reg); | |
471 | ||
472 | /* Fill register cache */ | |
473 | for (i = 0; i < ARRAY_SIZE(aic26->reg_cache); i++) | |
474 | aic26_reg_read(&aic26->codec, i); | |
475 | ||
476 | /* Register the sysfs files for debugging */ | |
477 | /* Create SysFS files */ | |
478 | rc = device_create_file(&spi->dev, &dev_attr_keyclick); | |
479 | if (rc) | |
480 | dev_info(&spi->dev, "error creating sysfs files\n"); | |
481 | ||
482 | #if defined(CONFIG_SND_SOC_OF_SIMPLE) | |
483 | /* Tell the of_soc helper about this codec */ | |
484 | of_snd_soc_register_codec(&aic26_soc_codec_dev, aic26, &aic26_dai, | |
485 | spi->dev.archdata.of_node); | |
486 | #endif | |
487 | ||
488 | dev_dbg(&spi->dev, "SPI device initialized\n"); | |
489 | return 0; | |
490 | } | |
491 | ||
492 | static int aic26_spi_remove(struct spi_device *spi) | |
493 | { | |
494 | struct aic26 *aic26 = dev_get_drvdata(&spi->dev); | |
495 | ||
496 | kfree(aic26); | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | static struct spi_driver aic26_spi = { | |
502 | .driver = { | |
503 | .name = "tlv320aic26", | |
504 | .owner = THIS_MODULE, | |
505 | }, | |
506 | .probe = aic26_spi_probe, | |
507 | .remove = aic26_spi_remove, | |
508 | }; | |
509 | ||
510 | static int __init aic26_init(void) | |
511 | { | |
512 | return spi_register_driver(&aic26_spi); | |
513 | } | |
514 | module_init(aic26_init); | |
515 | ||
516 | static void __exit aic26_exit(void) | |
517 | { | |
518 | spi_unregister_driver(&aic26_spi); | |
519 | } | |
520 | module_exit(aic26_exit); |