2 * neo1973_wm8753.c -- SoC audio for Neo1973
4 * Copyright 2007 Wolfson Microelectronics PLC.
5 * Author: Graeme Gregory
6 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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.
14 * 20th Jan 2007 Initial version.
15 * 05th Feb 2007 Rename all to Neo1973
19 #include <linux/module.h>
20 #include <linux/moduleparam.h>
21 #include <linux/timer.h>
22 #include <linux/interrupt.h>
23 #include <linux/platform_device.h>
24 #include <linux/i2c.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/soc.h>
28 #include <sound/soc-dapm.h>
30 #include <asm/mach-types.h>
31 #include <asm/hardware/scoop.h>
32 #include <asm/arch/regs-clock.h>
33 #include <asm/arch/regs-gpio.h>
34 #include <asm/hardware.h>
35 #include <asm/arch/audio.h>
37 #include <asm/arch/spi-gpio.h>
39 #include <asm/plat-s3c24xx/regs-iis.h>
41 #include "../codecs/wm8753.h"
43 #include "s3c24xx-pcm.h"
44 #include "s3c24xx-i2s.h"
47 #define S3C24XX_SOC_NEO1973_WM8753_DEBUG 0
48 #if S3C24XX_SOC_NEO1973_WM8753_DEBUG
49 #define DBG(x...) printk(KERN_DEBUG "s3c24xx-soc-neo1973-wm8753: " x)
54 /* define the scenarios */
55 #define NEO_AUDIO_OFF 0
56 #define NEO_GSM_CALL_AUDIO_HANDSET 1
57 #define NEO_GSM_CALL_AUDIO_HEADSET 2
58 #define NEO_GSM_CALL_AUDIO_BLUETOOTH 3
59 #define NEO_STEREO_TO_SPEAKERS 4
60 #define NEO_STEREO_TO_HEADPHONES 5
61 #define NEO_CAPTURE_HANDSET 6
62 #define NEO_CAPTURE_HEADSET 7
63 #define NEO_CAPTURE_BLUETOOTH 8
65 static struct snd_soc_machine neo1973;
66 static struct i2c_client *i2c;
68 static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params *params)
71 struct snd_soc_pcm_runtime *rtd = substream->private_data;
72 struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
73 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
74 unsigned int pll_out = 0, bclk = 0;
76 unsigned long iis_clkrate;
78 DBG("Entered %s\n", __func__);
80 iis_clkrate = s3c24xx_i2s_get_clockrate();
82 switch (params_rate(params)) {
88 bclk = WM8753_BCLK_DIV_4;
92 bclk = WM8753_BCLK_DIV_2;
96 bclk = WM8753_BCLK_DIV_16;
100 bclk = WM8753_BCLK_DIV_8;
104 bclk = WM8753_BCLK_DIV_4;
108 bclk = WM8753_BCLK_DIV_2;
113 /* set codec DAI configuration */
114 ret = codec_dai->dai_ops.set_fmt(codec_dai,
115 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
116 SND_SOC_DAIFMT_CBM_CFM);
120 /* set cpu DAI configuration */
121 ret = cpu_dai->dai_ops.set_fmt(cpu_dai,
122 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
123 SND_SOC_DAIFMT_CBM_CFM);
127 /* set the codec system clock for DAC and ADC */
128 ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_MCLK, pll_out,
133 /* set MCLK division for sample rate */
134 ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
135 S3C2410_IISMOD_32FS);
139 /* set codec BCLK division for sample rate */
140 ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
144 /* set prescaler division for sample rate */
145 ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
146 S3C24XX_PRESCALE(4, 4));
150 /* codec PLL input is PCLK/4 */
151 ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1,
152 iis_clkrate / 4, pll_out);
159 static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
161 struct snd_soc_pcm_runtime *rtd = substream->private_data;
162 struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
164 DBG("Entered %s\n", __func__);
166 /* disable the PLL */
167 return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1, 0, 0);
171 * Neo1973 WM8753 HiFi DAI opserations.
173 static struct snd_soc_ops neo1973_hifi_ops = {
174 .hw_params = neo1973_hifi_hw_params,
175 .hw_free = neo1973_hifi_hw_free,
178 static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
179 struct snd_pcm_hw_params *params)
181 struct snd_soc_pcm_runtime *rtd = substream->private_data;
182 struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
183 unsigned int pcmdiv = 0;
185 unsigned long iis_clkrate;
187 DBG("Entered %s\n", __func__);
189 iis_clkrate = s3c24xx_i2s_get_clockrate();
191 if (params_rate(params) != 8000)
193 if (params_channels(params) != 1)
196 pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
198 /* todo: gg check mode (DSP_B) against CSR datasheet */
199 /* set codec DAI configuration */
200 ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
201 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
205 /* set the codec system clock for DAC and ADC */
206 ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
211 /* set codec PCM division for sample rate */
212 ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
216 /* configue and enable PLL for 12.288MHz output */
217 ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2,
218 iis_clkrate / 4, 12288000);
225 static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
227 struct snd_soc_pcm_runtime *rtd = substream->private_data;
228 struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
230 DBG("Entered %s\n", __func__);
232 /* disable the PLL */
233 return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2, 0, 0);
236 static struct snd_soc_ops neo1973_voice_ops = {
237 .hw_params = neo1973_voice_hw_params,
238 .hw_free = neo1973_voice_hw_free,
241 static int neo1973_scenario;
243 static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
244 struct snd_ctl_elem_value *ucontrol)
246 ucontrol->value.integer.value[0] = neo1973_scenario;
250 static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
252 DBG("Entered %s\n", __func__);
254 switch (neo1973_scenario) {
256 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
257 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
258 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
259 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
260 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
262 case NEO_GSM_CALL_AUDIO_HANDSET:
263 snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
264 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
265 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
266 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
267 snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
269 case NEO_GSM_CALL_AUDIO_HEADSET:
270 snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
271 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
272 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
273 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
274 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
276 case NEO_GSM_CALL_AUDIO_BLUETOOTH:
277 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
278 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
279 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
280 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
281 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
283 case NEO_STEREO_TO_SPEAKERS:
284 snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
285 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
286 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
287 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
288 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
290 case NEO_STEREO_TO_HEADPHONES:
291 snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
292 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
293 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
294 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
295 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
297 case NEO_CAPTURE_HANDSET:
298 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
299 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
300 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
301 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
302 snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
304 case NEO_CAPTURE_HEADSET:
305 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
306 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
307 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
308 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
309 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
311 case NEO_CAPTURE_BLUETOOTH:
312 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
313 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
314 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
315 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
316 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
319 snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
320 snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
321 snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
322 snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
323 snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
326 snd_soc_dapm_sync_endpoints(codec);
331 static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
332 struct snd_ctl_elem_value *ucontrol)
334 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
336 DBG("Entered %s\n", __func__);
338 if (neo1973_scenario == ucontrol->value.integer.value[0])
341 neo1973_scenario = ucontrol->value.integer.value[0];
342 set_scenario_endpoints(codec, neo1973_scenario);
346 static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
348 static void lm4857_write_regs(void)
350 DBG("Entered %s\n", __func__);
352 if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
353 printk(KERN_ERR "lm4857: i2c write failed\n");
356 static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
357 struct snd_ctl_elem_value *ucontrol)
359 int reg = kcontrol->private_value & 0xFF;
360 int shift = (kcontrol->private_value >> 8) & 0x0F;
361 int mask = (kcontrol->private_value >> 16) & 0xFF;
363 DBG("Entered %s\n", __func__);
365 ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
369 static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
370 struct snd_ctl_elem_value *ucontrol)
372 int reg = kcontrol->private_value & 0xFF;
373 int shift = (kcontrol->private_value >> 8) & 0x0F;
374 int mask = (kcontrol->private_value >> 16) & 0xFF;
376 if (((lm4857_regs[reg] >> shift) & mask) ==
377 ucontrol->value.integer.value[0])
380 lm4857_regs[reg] &= ~(mask << shift);
381 lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
386 static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
387 struct snd_ctl_elem_value *ucontrol)
389 u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
391 DBG("Entered %s\n", __func__);
396 ucontrol->value.integer.value[0] = value;
400 static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
401 struct snd_ctl_elem_value *ucontrol)
403 u8 value = ucontrol->value.integer.value[0];
405 DBG("Entered %s\n", __func__);
410 if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
413 lm4857_regs[LM4857_CTRL] &= 0xF0;
414 lm4857_regs[LM4857_CTRL] |= value;
419 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
420 SND_SOC_DAPM_LINE("Audio Out", NULL),
421 SND_SOC_DAPM_LINE("GSM Line Out", NULL),
422 SND_SOC_DAPM_LINE("GSM Line In", NULL),
423 SND_SOC_DAPM_MIC("Headset Mic", NULL),
424 SND_SOC_DAPM_MIC("Call Mic", NULL),
428 /* example machine audio_mapnections */
429 static const char *audio_map[][3] = {
431 /* Connections to the lm4857 amp */
432 {"Audio Out", NULL, "LOUT1"},
433 {"Audio Out", NULL, "ROUT1"},
435 /* Connections to the GSM Module */
436 {"GSM Line Out", NULL, "MONO1"},
437 {"GSM Line Out", NULL, "MONO2"},
438 {"RXP", NULL, "GSM Line In"},
439 {"RXN", NULL, "GSM Line In"},
441 /* Connections to Headset */
442 {"MIC1", NULL, "Mic Bias"},
443 {"Mic Bias", NULL, "Headset Mic"},
446 {"MIC2", NULL, "Mic Bias"},
447 {"MIC2N", NULL, "Mic Bias"},
448 {"Mic Bias", NULL, "Call Mic"},
450 /* Connect the ALC pins */
451 {"ACIN", NULL, "ACOP"},
456 static const char *lm4857_mode[] = {
460 "Stereo Speakers + Headphones",
464 static const struct soc_enum lm4857_mode_enum[] = {
465 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
468 static const char *neo_scenarios[] = {
480 static const struct soc_enum neo_scenario_enum[] = {
481 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios), neo_scenarios),
484 static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
485 SOC_SINGLE_EXT("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
486 lm4857_get_reg, lm4857_set_reg),
487 SOC_SINGLE_EXT("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
488 lm4857_get_reg, lm4857_set_reg),
489 SOC_SINGLE_EXT("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
490 lm4857_get_reg, lm4857_set_reg),
491 SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
492 lm4857_get_mode, lm4857_set_mode),
493 SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
494 neo1973_get_scenario, neo1973_set_scenario),
495 SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
496 lm4857_get_reg, lm4857_set_reg),
497 SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
498 lm4857_get_reg, lm4857_set_reg),
499 SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
500 lm4857_get_reg, lm4857_set_reg),
501 SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
502 lm4857_get_reg, lm4857_set_reg),
506 * This is an example machine initialisation for a wm8753 connected to a
507 * neo1973 II. It is missing logic to detect hp/mic insertions and logic
508 * to re-route the audio in such an event.
510 static int neo1973_wm8753_init(struct snd_soc_codec *codec)
514 DBG("Entered %s\n", __func__);
516 /* set up NC codec pins */
517 snd_soc_dapm_set_endpoint(codec, "LOUT2", 0);
518 snd_soc_dapm_set_endpoint(codec, "ROUT2", 0);
519 snd_soc_dapm_set_endpoint(codec, "OUT3", 0);
520 snd_soc_dapm_set_endpoint(codec, "OUT4", 0);
521 snd_soc_dapm_set_endpoint(codec, "LINE1", 0);
522 snd_soc_dapm_set_endpoint(codec, "LINE2", 0);
525 /* set endpoints to default mode */
526 set_scenario_endpoints(codec, NEO_AUDIO_OFF);
528 /* Add neo1973 specific widgets */
529 for (i = 0; i < ARRAY_SIZE(wm8753_dapm_widgets); i++)
530 snd_soc_dapm_new_control(codec, &wm8753_dapm_widgets[i]);
532 /* add neo1973 specific controls */
533 for (i = 0; i < ARRAY_SIZE(wm8753_neo1973_controls); i++) {
534 err = snd_ctl_add(codec->card,
535 snd_soc_cnew(&wm8753_neo1973_controls[i],
541 /* set up neo1973 specific audio path audio_mapnects */
542 for (i = 0; audio_map[i][0] != NULL; i++) {
543 snd_soc_dapm_connect_input(codec, audio_map[i][0],
544 audio_map[i][1], audio_map[i][2]);
547 snd_soc_dapm_sync_endpoints(codec);
554 static struct snd_soc_cpu_dai bt_dai = {
557 .type = SND_SOC_DAI_PCM,
561 .rates = SNDRV_PCM_RATE_8000,
562 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
566 .rates = SNDRV_PCM_RATE_8000,
567 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
570 static struct snd_soc_dai_link neo1973_dai[] = {
571 { /* Hifi Playback - for similatious use with voice below */
573 .stream_name = "WM8753 HiFi",
574 .cpu_dai = &s3c24xx_i2s_dai,
575 .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
576 .init = neo1973_wm8753_init,
577 .ops = &neo1973_hifi_ops,
581 .stream_name = "Voice",
583 .codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
584 .ops = &neo1973_voice_ops,
588 static struct snd_soc_machine neo1973 = {
590 .dai_link = neo1973_dai,
591 .num_links = ARRAY_SIZE(neo1973_dai),
594 static struct wm8753_setup_data neo1973_wm8753_setup = {
598 static struct snd_soc_device neo1973_snd_devdata = {
600 .platform = &s3c24xx_soc_platform,
601 .codec_dev = &soc_codec_dev_wm8753,
602 .codec_data = &neo1973_wm8753_setup,
605 static struct i2c_client client_template;
607 static const unsigned short normal_i2c[] = { 0x7C, I2C_CLIENT_END };
609 /* Magic definition of all other variables and things */
612 static int lm4857_amp_probe(struct i2c_adapter *adap, int addr, int kind)
616 DBG("Entered %s\n", __func__);
618 client_template.adapter = adap;
619 client_template.addr = addr;
621 i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
625 ret = i2c_attach_client(i2c);
627 printk(KERN_ERR "LM4857 failed to attach at addr %x\n", addr);
639 static int lm4857_i2c_detach(struct i2c_client *client)
641 DBG("Entered %s\n", __func__);
643 i2c_detach_client(client);
648 static int lm4857_i2c_attach(struct i2c_adapter *adap)
650 DBG("Entered %s\n", __func__);
652 return i2c_probe(adap, &addr_data, lm4857_amp_probe);
655 static u8 lm4857_state;
657 static int lm4857_suspend(struct i2c_client *dev, pm_message_t state)
659 DBG("Entered %s\n", __func__);
661 dev_dbg(&dev->dev, "lm4857_suspend\n");
662 lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf;
664 lm4857_regs[LM4857_CTRL] &= 0xf0;
670 static int lm4857_resume(struct i2c_client *dev)
672 DBG("Entered %s\n", __func__);
675 lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f);
681 static void lm4857_shutdown(struct i2c_client *dev)
683 DBG("Entered %s\n", __func__);
685 dev_dbg(&dev->dev, "lm4857_shutdown\n");
686 lm4857_regs[LM4857_CTRL] &= 0xf0;
690 /* corgi i2c codec control layer */
691 static struct i2c_driver lm4857_i2c_driver = {
693 .name = "LM4857 I2C Amp",
694 .owner = THIS_MODULE,
696 .id = I2C_DRIVERID_LM4857,
697 .suspend = lm4857_suspend,
698 .resume = lm4857_resume,
699 .shutdown = lm4857_shutdown,
700 .attach_adapter = lm4857_i2c_attach,
701 .detach_client = lm4857_i2c_detach,
705 static struct i2c_client client_template = {
707 .driver = &lm4857_i2c_driver,
710 static struct platform_device *neo1973_snd_device;
712 static int __init neo1973_init(void)
716 DBG("Entered %s\n", __func__);
718 neo1973_snd_device = platform_device_alloc("soc-audio", -1);
719 if (!neo1973_snd_device)
722 platform_set_drvdata(neo1973_snd_device, &neo1973_snd_devdata);
723 neo1973_snd_devdata.dev = &neo1973_snd_device->dev;
724 ret = platform_device_add(neo1973_snd_device);
727 platform_device_put(neo1973_snd_device);
729 ret = i2c_add_driver(&lm4857_i2c_driver);
731 printk(KERN_ERR "can't add i2c driver");
736 static void __exit neo1973_exit(void)
738 DBG("Entered %s\n", __func__);
740 i2c_del_driver(&lm4857_i2c_driver);
741 platform_device_unregister(neo1973_snd_device);
744 module_init(neo1973_init);
745 module_exit(neo1973_exit);
747 /* Module information */
748 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
749 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
750 MODULE_LICENSE("GPL");