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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/max9867.c

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  1 /*
  2  * max9867.c -- max9867 ALSA SoC Audio driver
  3  *
  4  * Copyright 2013-15 Maxim Integrated Products
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2 as
  8  * published by the Free Software Foundation.
  9  */
 10 
 11 #include <linux/delay.h>
 12 #include <linux/i2c.h>
 13 #include <linux/module.h>
 14 #include <linux/regmap.h>
 15 #include <sound/pcm_params.h>
 16 #include <sound/soc.h>
 17 #include <sound/tlv.h>
 18 #include "max9867.h"
 19 
 20 static const char *const max9867_spmode[] = {
 21         "Stereo Diff", "Mono Diff",
 22         "Stereo Cap", "Mono Cap",
 23         "Stereo Single", "Mono Single",
 24         "Stereo Single Fast", "Mono Single Fast"
 25 };
 26 static const char *const max9867_sidetone_text[] = {
 27         "None", "Left", "Right", "LeftRight", "LeftRightDiv2",
 28 };
 29 static const char *const max9867_filter_text[] = {"IIR", "FIR"};
 30 
 31 static SOC_ENUM_SINGLE_DECL(max9867_filter, MAX9867_CODECFLTR, 7,
 32         max9867_filter_text);
 33 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
 34         max9867_spmode);
 35 static SOC_ENUM_SINGLE_DECL(max9867_sidetone, MAX9867_DACGAIN, 6,
 36         max9867_sidetone_text);
 37 static DECLARE_TLV_DB_SCALE(max9860_capture_tlv, -600, 200, 0);
 38 static DECLARE_TLV_DB_SCALE(max9860_mic_tlv, 2000, 100, 1);
 39 static DECLARE_TLV_DB_SCALE(max9860_adc_left_tlv, -1200, 100, 1);
 40 static DECLARE_TLV_DB_SCALE(max9860_adc_right_tlv, -1200, 100, 1);
 41 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max98088_micboost_tlv,
 42         0, 1, TLV_DB_SCALE_ITEM(0, 2000, 0),
 43         2, 2, TLV_DB_SCALE_ITEM(3000, 0, 0),
 44 );
 45 
 46 static const struct snd_kcontrol_new max9867_snd_controls[] = {
 47         SOC_DOUBLE_R("Master Playback Volume", MAX9867_LEFTVOL,
 48                                 MAX9867_RIGHTVOL, 0, 63, 1),
 49         SOC_DOUBLE_R_TLV("Capture Volume", MAX9867_LEFTMICGAIN,
 50                         MAX9867_RIGHTMICGAIN,
 51                         0, 15, 1, max9860_capture_tlv),
 52         SOC_DOUBLE_R_TLV("Mic Volume", MAX9867_LEFTMICGAIN,
 53                         MAX9867_RIGHTMICGAIN, 0, 31, 1, max9860_mic_tlv),
 54         SOC_DOUBLE_R_TLV("Mic Boost Volume", MAX9867_LEFTMICGAIN,
 55                         MAX9867_RIGHTMICGAIN, 5, 3, 0, max98088_micboost_tlv),
 56         SOC_ENUM("Digital Sidetone Src", max9867_sidetone),
 57         SOC_SINGLE("Sidetone Volume", MAX9867_DACGAIN, 0, 31, 1),
 58         SOC_SINGLE("DAC Volume", MAX9867_DACLEVEL, 4, 3, 0),
 59         SOC_SINGLE("DAC Attenuation", MAX9867_DACLEVEL, 0, 15, 1),
 60         SOC_SINGLE_TLV("ADC Left Volume", MAX9867_ADCLEVEL,
 61                         4, 15, 1, max9860_adc_left_tlv),
 62         SOC_SINGLE_TLV("ADC Right Volume", MAX9867_ADCLEVEL,
 63                         0, 15, 1, max9860_adc_right_tlv),
 64         SOC_ENUM("Speaker Mode", max9867_spkmode),
 65         SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
 66         SOC_SINGLE("ZCD Switch", MAX9867_MODECONFIG, 5, 1, 0),
 67         SOC_ENUM("DSP Filter", max9867_filter),
 68 };
 69 
 70 static const char *const max9867_mux[] = {"None", "Mic", "Line", "Mic_Line"};
 71 
 72 static SOC_ENUM_SINGLE_DECL(max9867_mux_enum,
 73         MAX9867_INPUTCONFIG, MAX9867_INPUT_SHIFT,
 74         max9867_mux);
 75 
 76 static const struct snd_kcontrol_new max9867_dapm_mux_controls =
 77         SOC_DAPM_ENUM("Route", max9867_mux_enum);
 78 
 79 static const struct snd_kcontrol_new max9867_left_dapm_control =
 80         SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 6, 1, 0);
 81 static const struct snd_kcontrol_new max9867_right_dapm_control =
 82         SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 5, 1, 0);
 83 static const struct snd_kcontrol_new max9867_line_dapm_control =
 84         SOC_DAPM_SINGLE("Switch", MAX9867_LEFTLINELVL, 6, 1, 1);
 85 
 86 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
 87         SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
 88         SND_SOC_DAPM_DAC("Left DAC", NULL, MAX9867_PWRMAN, 3, 0),
 89         SND_SOC_DAPM_DAC("Right DAC", NULL, MAX9867_PWRMAN, 2, 0),
 90         SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
 91         SND_SOC_DAPM_OUTPUT("HPOUT"),
 92 
 93         SND_SOC_DAPM_AIF_IN("DAI_IN", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0),
 94         SND_SOC_DAPM_ADC("Left ADC", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
 95         SND_SOC_DAPM_ADC("Right ADC", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
 96         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 97                 &max9867_dapm_mux_controls),
 98 
 99         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
100         SND_SOC_DAPM_SWITCH("Left Line", MAX9867_LEFTLINELVL, 6, 1,
101                 &max9867_left_dapm_control),
102         SND_SOC_DAPM_SWITCH("Right Line", MAX9867_RIGTHLINELVL, 6, 1,
103                 &max9867_right_dapm_control),
104         SND_SOC_DAPM_SWITCH("Line Mixer", SND_SOC_NOPM, 0, 0,
105                 &max9867_line_dapm_control),
106         SND_SOC_DAPM_INPUT("LINE_IN"),
107 };
108 
109 static const struct snd_soc_dapm_route max9867_audio_map[] = {
110         {"Left DAC", NULL, "DAI_OUT"},
111         {"Right DAC", NULL, "DAI_OUT"},
112         {"Output Mixer", NULL, "Left DAC"},
113         {"Output Mixer", NULL, "Right DAC"},
114         {"HPOUT", NULL, "Output Mixer"},
115 
116         {"Left ADC", NULL, "DAI_IN"},
117         {"Right ADC", NULL, "DAI_IN"},
118         {"Input Mixer", NULL, "Left ADC"},
119         {"Input Mixer", NULL, "Right ADC"},
120         {"Input Mux", "Line", "Input Mixer"},
121         {"Input Mux", "Mic", "Input Mixer"},
122         {"Input Mux", "Mic_Line", "Input Mixer"},
123         {"Right Line", "Switch", "Input Mux"},
124         {"Left Line", "Switch", "Input Mux"},
125         {"LINE_IN", NULL, "Left Line"},
126         {"LINE_IN", NULL, "Right Line"},
127 };
128 
129 enum rates {
130         pcm_rate_8, pcm_rate_16, pcm_rate_24,
131         pcm_rate_32, pcm_rate_44,
132         pcm_rate_48, max_pcm_rate,
133 };
134 
135 struct ni_div_rates {
136         u32 mclk;
137         u16 ni[max_pcm_rate];
138 } ni_div[] = {
139         {11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} },
140         {12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} },
141         {12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} },
142         {13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} },
143         {19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} },
144         {24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} },
145         {26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} },
146         {27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} },
147 };
148 
149 static inline int get_ni_value(int mclk, int rate)
150 {
151         int i, ret = 0;
152 
153         /* find the closest rate index*/
154         for (i = 0; i < ARRAY_SIZE(ni_div); i++) {
155                 if (ni_div[i].mclk >= mclk)
156                         break;
157         }
158         if (i == ARRAY_SIZE(ni_div))
159                 return -EINVAL;
160 
161         switch (rate) {
162         case 8000:
163                 return ni_div[i].ni[pcm_rate_8];
164         case 16000:
165                 return ni_div[i].ni[pcm_rate_16];
166         case 32000:
167                 return ni_div[i].ni[pcm_rate_32];
168         case 44100:
169                 return ni_div[i].ni[pcm_rate_44];
170         case 48000:
171                 return ni_div[i].ni[pcm_rate_48];
172         default:
173                 pr_err("%s wrong rate %d\n", __func__, rate);
174                 ret = -EINVAL;
175         }
176         return ret;
177 }
178 
179 static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
180                 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
181 {
182         struct snd_soc_codec *codec = dai->codec;
183         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
184         unsigned int ni_h, ni_l;
185         int value;
186 
187         value = get_ni_value(max9867->sysclk, params_rate(params));
188         if (value < 0)
189                 return value;
190 
191         ni_h = (0xFF00 & value) >> 8;
192         ni_l = 0x00FF & value;
193         /* set up the ni value */
194         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
195                 MAX9867_NI_HIGH_MASK, ni_h);
196         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
197                 MAX9867_NI_LOW_MASK, ni_l);
198         if (!max9867->master) {
199                 /*
200                  * digital pll locks on to any externally supplied LRCLK signal
201                  * and also enable rapid lock mode.
202                  */
203                 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
204                         MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
205                 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
206                         MAX9867_PLL, MAX9867_PLL);
207         } else {
208                 unsigned long int bclk_rate, pclk_bclk_ratio;
209                 int bclk_value;
210 
211                 bclk_rate = params_rate(params) * 2 * params_width(params);
212                 pclk_bclk_ratio = max9867->pclk/bclk_rate;
213                 switch (params_width(params)) {
214                 case 8:
215                 case 16:
216                         switch (pclk_bclk_ratio) {
217                         case 2:
218                                 bclk_value = MAX9867_IFC1B_PCLK_2;
219                                 break;
220                         case 4:
221                                 bclk_value = MAX9867_IFC1B_PCLK_4;
222                                 break;
223                         case 8:
224                                 bclk_value = MAX9867_IFC1B_PCLK_8;
225                                 break;
226                         case 16:
227                                 bclk_value = MAX9867_IFC1B_PCLK_16;
228                                 break;
229                         default:
230                                 dev_err(codec->dev,
231                                         "unsupported sampling rate\n");
232                                 return -EINVAL;
233                         }
234                         break;
235                 case 24:
236                         bclk_value = MAX9867_IFC1B_24BIT;
237                         break;
238                 case 32:
239                         bclk_value = MAX9867_IFC1B_32BIT;
240                         break;
241                 default:
242                         dev_err(codec->dev, "unsupported sampling rate\n");
243                         return -EINVAL;
244                 }
245                 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
246                         MAX9867_IFC1B_BCLK_MASK, bclk_value);
247         }
248         return 0;
249 }
250 
251 static int max9867_prepare(struct snd_pcm_substream *substream,
252                          struct snd_soc_dai *dai)
253 {
254         struct snd_soc_codec *codec = dai->codec;
255         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
256 
257         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
258                 MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
259         return 0;
260 }
261 
262 static int max9867_mute(struct snd_soc_dai *dai, int mute)
263 {
264         struct snd_soc_codec *codec = dai->codec;
265         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
266 
267         if (mute)
268                 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
269                         MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
270         else
271                 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
272                         MAX9867_DAC_MUTE_MASK, 0);
273         return 0;
274 }
275 
276 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
277                 int clk_id, unsigned int freq, int dir)
278 {
279         struct snd_soc_codec *codec = codec_dai->codec;
280         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
281         int value = 0;
282 
283         /* Set the prescaler based on the master clock frequency*/
284         if (freq >= 10000000 && freq <= 20000000) {
285                 value |= MAX9867_PSCLK_10_20;
286                 max9867->pclk =  freq;
287         } else if (freq >= 20000000 && freq <= 40000000) {
288                 value |= MAX9867_PSCLK_20_40;
289                 max9867->pclk =  freq/2;
290         } else if (freq >= 40000000 && freq <= 60000000) {
291                 value |= MAX9867_PSCLK_40_60;
292                 max9867->pclk =  freq/4;
293         } else {
294                 pr_err("bad clock frequency %d", freq);
295                 return -EINVAL;
296         }
297         value = value << MAX9867_PSCLK_SHIFT;
298         max9867->sysclk = freq;
299         /* exact integer mode is not supported */
300         value &= ~MAX9867_FREQ_MASK;
301         regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
302                         MAX9867_PSCLK_MASK, value);
303         return 0;
304 }
305 
306 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
307                 unsigned int fmt)
308 {
309         struct snd_soc_codec *codec = codec_dai->codec;
310         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
311         u8 iface1A = 0, iface1B = 0;
312         int ret;
313 
314         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
315         case SND_SOC_DAIFMT_CBM_CFM:
316                 max9867->master = 1;
317                 iface1A |= MAX9867_MASTER;
318                 break;
319         case SND_SOC_DAIFMT_CBS_CFS:
320                 max9867->master = 0;
321                 iface1A &= ~MAX9867_MASTER;
322                 break;
323         default:
324                 return -EINVAL;
325         }
326 
327         /* for i2s compatible mode */
328         iface1A |= MAX9867_I2S_DLY;
329         /* SDOUT goes to hiz state after all data is transferred */
330         iface1A |= MAX9867_SDOUT_HIZ;
331 
332         /* Clock inversion bits, BCI and WCI */
333         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
334         case SND_SOC_DAIFMT_NB_NF:
335                 break;
336         case SND_SOC_DAIFMT_IB_IF:
337                 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
338                 break;
339         case SND_SOC_DAIFMT_IB_NF:
340                 iface1A |= MAX9867_BCI_MODE;
341                 break;
342         case SND_SOC_DAIFMT_NB_IF:
343                 iface1A |= MAX9867_WCI_MODE;
344                 break;
345         default:
346                 return -EINVAL;
347         }
348 
349         ret = regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
350         ret = regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
351         return 0;
352 }
353 
354 static struct snd_soc_dai_ops max9867_dai_ops = {
355         .set_fmt = max9867_dai_set_fmt,
356         .set_sysclk     = max9867_set_dai_sysclk,
357         .prepare        = max9867_prepare,
358         .digital_mute   = max9867_mute,
359         .hw_params = max9867_dai_hw_params,
360 };
361 
362 #define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
363         SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
364 #define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
365 
366 static struct snd_soc_dai_driver max9867_dai[] = {
367         {
368         .name = "max9867-aif1",
369         .playback = {
370                 .stream_name = "HiFi Playback",
371                 .channels_min = 1,
372                 .channels_max = 2,
373                 .rates = MAX9867_RATES,
374                 .formats = MAX9867_FORMATS,
375         },
376         .capture = {
377                 .stream_name = "HiFi Capture",
378                 .channels_min = 1,
379                 .channels_max = 2,
380                 .rates = MAX9867_RATES,
381                 .formats = MAX9867_FORMATS,
382         },
383         .ops = &max9867_dai_ops,
384         }
385 };
386 
387 #ifdef CONFIG_PM_SLEEP
388 static int max9867_suspend(struct device *dev)
389 {
390         struct max9867_priv *max9867 = dev_get_drvdata(dev);
391 
392         /* Drop down to power saving mode when system is suspended */
393         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
394                 MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
395         return 0;
396 }
397 
398 static int max9867_resume(struct device *dev)
399 {
400         struct max9867_priv *max9867 = dev_get_drvdata(dev);
401 
402         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
403                 MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
404         return 0;
405 }
406 #endif
407 
408 static int max9867_probe(struct snd_soc_codec *codec)
409 {
410         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
411 
412         dev_dbg(codec->dev, "max98090_probe\n");
413         max9867->codec = codec;
414         return 0;
415 }
416 
417 static struct snd_soc_codec_driver max9867_codec = {
418         .probe = max9867_probe,
419         .component_driver = {
420                 .controls               = max9867_snd_controls,
421                 .num_controls           = ARRAY_SIZE(max9867_snd_controls),
422                 .dapm_routes            = max9867_audio_map,
423                 .num_dapm_routes        = ARRAY_SIZE(max9867_audio_map),
424                 .dapm_widgets           = max9867_dapm_widgets,
425                 .num_dapm_widgets       = ARRAY_SIZE(max9867_dapm_widgets),
426         },
427 };
428 
429 static bool max9867_volatile_register(struct device *dev, unsigned int reg)
430 {
431         switch (reg) {
432         case MAX9867_STATUS:
433         case MAX9867_JACKSTATUS:
434         case MAX9867_AUXHIGH:
435         case MAX9867_AUXLOW:
436                 return true;
437         default:
438                 return false;
439         }
440 }
441 
442 static const struct reg_default max9867_reg[] = {
443         { 0x04, 0x00 },
444         { 0x05, 0x00 },
445         { 0x06, 0x00 },
446         { 0x07, 0x00 },
447         { 0x08, 0x00 },
448         { 0x09, 0x00 },
449         { 0x0A, 0x00 },
450         { 0x0B, 0x00 },
451         { 0x0C, 0x00 },
452         { 0x0D, 0x00 },
453         { 0x0E, 0x00 },
454         { 0x0F, 0x00 },
455         { 0x10, 0x00 },
456         { 0x11, 0x00 },
457         { 0x12, 0x00 },
458         { 0x13, 0x00 },
459         { 0x14, 0x00 },
460         { 0x15, 0x00 },
461         { 0x16, 0x00 },
462         { 0x17, 0x00 },
463 };
464 
465 static const struct regmap_config max9867_regmap = {
466         .reg_bits       = 8,
467         .val_bits       = 8,
468         .max_register   = MAX9867_REVISION,
469         .reg_defaults   = max9867_reg,
470         .num_reg_defaults = ARRAY_SIZE(max9867_reg),
471         .volatile_reg   = max9867_volatile_register,
472         .cache_type     = REGCACHE_RBTREE,
473 };
474 
475 static int max9867_i2c_probe(struct i2c_client *i2c,
476                 const struct i2c_device_id *id)
477 {
478         struct max9867_priv *max9867;
479         int ret = 0, reg;
480 
481         max9867 = devm_kzalloc(&i2c->dev,
482                         sizeof(*max9867), GFP_KERNEL);
483         if (!max9867)
484                 return -ENOMEM;
485 
486         i2c_set_clientdata(i2c, max9867);
487         max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
488         if (IS_ERR(max9867->regmap)) {
489                 ret = PTR_ERR(max9867->regmap);
490                 dev_err(&i2c->dev,
491                                 "Failed to allocate regmap: %d\n", ret);
492                 return ret;
493         }
494         ret = regmap_read(max9867->regmap,
495                         MAX9867_REVISION, &reg);
496         if (ret < 0) {
497                 dev_err(&i2c->dev, "Failed to read: %d\n", ret);
498                 return ret;
499         }
500         dev_info(&i2c->dev, "device revision: %x\n", reg);
501         ret = snd_soc_register_codec(&i2c->dev, &max9867_codec,
502                         max9867_dai, ARRAY_SIZE(max9867_dai));
503         if (ret < 0) {
504                 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
505                 return ret;
506         }
507         return ret;
508 }
509 
510 static int max9867_i2c_remove(struct i2c_client *client)
511 {
512         snd_soc_unregister_codec(&client->dev);
513         return 0;
514 }
515 
516 static const struct i2c_device_id max9867_i2c_id[] = {
517         { "max9867", 0 },
518         { }
519 };
520 
521 static const struct of_device_id max9867_of_match[] = {
522         { .compatible = "maxim,max9867", },
523         { }
524 };
525 
526 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
527 
528 static const struct dev_pm_ops max9867_pm_ops = {
529         SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
530 };
531 
532 static struct i2c_driver max9867_i2c_driver = {
533         .driver = {
534                 .name = "max9867",
535                 .of_match_table = of_match_ptr(max9867_of_match),
536                 .pm = &max9867_pm_ops,
537         },
538         .probe  = max9867_i2c_probe,
539         .remove = max9867_i2c_remove,
540         .id_table = max9867_i2c_id,
541 };
542 
543 module_i2c_driver(max9867_i2c_driver);
544 
545 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
546 MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
547 MODULE_LICENSE("GPL");
548 

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