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Linux/sound/soc/codecs/max98926.c

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  1 /*
  2  * max98926.c -- ALSA SoC MAX98926 driver
  3  * Copyright 2013-15 Maxim Integrated Products
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation.
  7  */
  8 #include <linux/delay.h>
  9 #include <linux/i2c.h>
 10 #include <linux/module.h>
 11 #include <linux/regmap.h>
 12 #include <linux/slab.h>
 13 #include <linux/cdev.h>
 14 #include <sound/pcm.h>
 15 #include <sound/pcm_params.h>
 16 #include <sound/soc.h>
 17 #include <sound/tlv.h>
 18 #include "max98926.h"
 19 
 20 static const char * const max98926_boost_voltage_txt[] = {
 21         "8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
 22         "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
 23 };
 24 
 25 static const char * const max98926_boost_current_txt[] = {
 26         "0.6", "0.8", "1.0", "1.2", "1.4", "1.6", "1.8", "2.0",
 27         "2.2", "2.4", "2.6", "2.8", "3.2", "3.6", "4.0", "4.4"
 28 };
 29 
 30 static const char *const max98926_dai_txt[] = {
 31         "Left", "Right", "LeftRight", "LeftRightDiv2",
 32 };
 33 
 34 static const char *const max98926_pdm_ch_text[] = {
 35         "Current", "Voltage",
 36 };
 37 
 38 static const char *const max98926_hpf_cutoff_txt[] = {
 39         "Disable", "DC Block", "100Hz",
 40         "200Hz", "400Hz", "800Hz",
 41 };
 42 
 43 static const struct reg_default max98926_reg[] = {
 44         { 0x0B, 0x00 }, /* IRQ Enable0 */
 45         { 0x0C, 0x00 }, /* IRQ Enable1 */
 46         { 0x0D, 0x00 }, /* IRQ Enable2 */
 47         { 0x0E, 0x00 }, /* IRQ Clear0 */
 48         { 0x0F, 0x00 }, /* IRQ Clear1 */
 49         { 0x10, 0x00 }, /* IRQ Clear2 */
 50         { 0x11, 0xC0 }, /* Map0 */
 51         { 0x12, 0x00 }, /* Map1 */
 52         { 0x13, 0x00 }, /* Map2 */
 53         { 0x14, 0xF0 }, /* Map3 */
 54         { 0x15, 0x00 }, /* Map4 */
 55         { 0x16, 0xAB }, /* Map5 */
 56         { 0x17, 0x89 }, /* Map6 */
 57         { 0x18, 0x00 }, /* Map7 */
 58         { 0x19, 0x00 }, /* Map8 */
 59         { 0x1A, 0x04 }, /* DAI Clock Mode 1 */
 60         { 0x1B, 0x00 }, /* DAI Clock Mode 2 */
 61         { 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
 62         { 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
 63         { 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
 64         { 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
 65         { 0x20, 0x50 }, /* Format */
 66         { 0x21, 0x00 }, /* TDM Slot Select */
 67         { 0x22, 0x00 }, /* DOUT Configuration VMON */
 68         { 0x23, 0x00 }, /* DOUT Configuration IMON */
 69         { 0x24, 0x00 }, /* DOUT Configuration VBAT */
 70         { 0x25, 0x00 }, /* DOUT Configuration VBST */
 71         { 0x26, 0x00 }, /* DOUT Configuration FLAG */
 72         { 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
 73         { 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
 74         { 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
 75         { 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
 76         { 0x2B, 0x02 }, /* DOUT Drive Strength */
 77         { 0x2C, 0x90 }, /* Filters */
 78         { 0x2D, 0x00 }, /* Gain */
 79         { 0x2E, 0x02 }, /* Gain Ramping */
 80         { 0x2F, 0x00 }, /* Speaker Amplifier */
 81         { 0x30, 0x0A }, /* Threshold */
 82         { 0x31, 0x00 }, /* ALC Attack */
 83         { 0x32, 0x80 }, /* ALC Atten and Release */
 84         { 0x33, 0x00 }, /* ALC Infinite Hold Release */
 85         { 0x34, 0x92 }, /* ALC Configuration */
 86         { 0x35, 0x01 }, /* Boost Converter */
 87         { 0x36, 0x00 }, /* Block Enable */
 88         { 0x37, 0x00 }, /* Configuration */
 89         { 0x38, 0x00 }, /* Global Enable */
 90         { 0x3A, 0x00 }, /* Boost Limiter */
 91 };
 92 
 93 static const struct soc_enum max98926_voltage_enum[] = {
 94         SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0,
 95                 ARRAY_SIZE(max98926_pdm_ch_text),
 96                 max98926_pdm_ch_text),
 97 };
 98 
 99 static const struct snd_kcontrol_new max98926_voltage_control =
100         SOC_DAPM_ENUM("Route", max98926_voltage_enum);
101 
102 static const struct soc_enum max98926_current_enum[] = {
103         SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS,
104                 MAX98926_PDM_SOURCE_1_SHIFT,
105                 ARRAY_SIZE(max98926_pdm_ch_text),
106                 max98926_pdm_ch_text),
107 };
108 
109 static const struct snd_kcontrol_new max98926_current_control =
110         SOC_DAPM_ENUM("Route", max98926_current_enum);
111 
112 static const struct snd_kcontrol_new max98926_mixer_controls[] = {
113         SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP,
114                 MAX98926_INSELECT_MODE_SHIFT, 0, 0),
115         SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP,
116                 MAX98926_INSELECT_MODE_SHIFT, 1, 0),
117 };
118 
119 static const struct snd_kcontrol_new max98926_dai_controls[] = {
120         SOC_DAPM_SINGLE("Left", MAX98926_GAIN,
121                 MAX98926_DAC_IN_SEL_SHIFT, 0, 0),
122         SOC_DAPM_SINGLE("Right", MAX98926_GAIN,
123                 MAX98926_DAC_IN_SEL_SHIFT, 1, 0),
124         SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN,
125                 MAX98926_DAC_IN_SEL_SHIFT, 2, 0),
126         SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN,
127                 MAX98926_DAC_IN_SEL_SHIFT, 3, 0),
128 };
129 
130 static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = {
131         SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0,
132                 SND_SOC_NOPM, 0, 0),
133         SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE,
134                 MAX98926_SPK_EN_SHIFT, 0),
135         SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE,
136                 MAX98926_EN_SHIFT, 0, NULL, 0),
137         SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE,
138                 MAX98926_ADC_IMON_EN_WIDTH |
139                 MAX98926_ADC_VMON_EN_SHIFT,
140                 0, NULL, 0),
141         SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE,
142                 MAX98926_BST_EN_SHIFT, 0, NULL, 0),
143         SND_SOC_DAPM_OUTPUT("BE_OUT"),
144         SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP,
145                 MAX98926_INSELECT_MODE_SHIFT, 0,
146                 &max98926_mixer_controls[0],
147                 ARRAY_SIZE(max98926_mixer_controls)),
148         SND_SOC_DAPM_MIXER("DAI Sel",
149                 MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0,
150                 &max98926_dai_controls[0],
151                 ARRAY_SIZE(max98926_dai_controls)),
152         SND_SOC_DAPM_MUX("PDM CH1 Source",
153                 MAX98926_DAI_CLK_DIV_N_LSBS,
154                 MAX98926_PDM_CURRENT_SHIFT,
155                 0, &max98926_current_control),
156         SND_SOC_DAPM_MUX("PDM CH0 Source",
157                 MAX98926_DAI_CLK_DIV_N_LSBS,
158                 MAX98926_PDM_VOLTAGE_SHIFT,
159                 0, &max98926_voltage_control),
160 };
161 
162 static const struct snd_soc_dapm_route max98926_audio_map[] = {
163         {"VI Enable", NULL, "DAI_OUT"},
164         {"DAI Sel", "Left", "VI Enable"},
165         {"DAI Sel", "Right", "VI Enable"},
166         {"DAI Sel", "LeftRight", "VI Enable"},
167         {"DAI Sel", "LeftRightDiv2", "VI Enable"},
168         {"PCM Sel", "PCM", "DAI Sel"},
169 
170         {"PDM CH1 Source", "Current", "DAI_OUT"},
171         {"PDM CH1 Source", "Voltage", "DAI_OUT"},
172         {"PDM CH0 Source", "Current", "DAI_OUT"},
173         {"PDM CH0 Source", "Voltage", "DAI_OUT"},
174         {"PCM Sel", "Analog", "PDM CH1 Source"},
175         {"PCM Sel", "Analog", "PDM CH0 Source"},
176         {"Amp Enable", NULL, "PCM Sel"},
177 
178         {"BST Enable", NULL, "Amp Enable"},
179         {"BE_OUT", NULL, "BST Enable"},
180 };
181 
182 static bool max98926_volatile_register(struct device *dev, unsigned int reg)
183 {
184         switch (reg) {
185         case MAX98926_VBAT_DATA:
186         case MAX98926_VBST_DATA:
187         case MAX98926_LIVE_STATUS0:
188         case MAX98926_LIVE_STATUS1:
189         case MAX98926_LIVE_STATUS2:
190         case MAX98926_STATE0:
191         case MAX98926_STATE1:
192         case MAX98926_STATE2:
193         case MAX98926_FLAG0:
194         case MAX98926_FLAG1:
195         case MAX98926_FLAG2:
196         case MAX98926_VERSION:
197                 return true;
198         default:
199                 return false;
200         }
201 }
202 
203 static bool max98926_readable_register(struct device *dev, unsigned int reg)
204 {
205         switch (reg) {
206         case MAX98926_IRQ_CLEAR0:
207         case MAX98926_IRQ_CLEAR1:
208         case MAX98926_IRQ_CLEAR2:
209         case MAX98926_ALC_HOLD_RLS:
210                 return false;
211         default:
212                 return true;
213         }
214 };
215 
216 static DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0);
217 static DECLARE_TLV_DB_RANGE(max98926_current_tlv,
218         0, 11, TLV_DB_SCALE_ITEM(20, 20, 0),
219         12, 15, TLV_DB_SCALE_ITEM(320, 40, 0),
220 );
221 
222 static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff,
223                 MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT,
224                 max98926_hpf_cutoff_txt);
225 
226 static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage,
227                 MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT,
228                 max98926_boost_voltage_txt);
229 
230 static const struct snd_kcontrol_new max98926_snd_controls[] = {
231         SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN,
232                 MAX98926_SPK_GAIN_SHIFT,
233                 (1<<MAX98926_SPK_GAIN_WIDTH)-1, 0,
234                 max98926_spk_tlv),
235         SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING,
236                 MAX98926_SPK_RMP_EN_SHIFT, 1, 0),
237         SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING,
238                 MAX98926_SPK_ZCD_EN_SHIFT, 1, 0),
239         SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD,
240                 MAX98926_ALC_EN_SHIFT, 1, 0),
241         SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD,
242                 MAX98926_ALC_TH_SHIFT,
243                 (1<<MAX98926_ALC_TH_WIDTH)-1, 0),
244         SOC_ENUM("Boost Output Voltage", max98926_boost_voltage),
245         SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER,
246                 MAX98926_BST_ILIM_SHIFT,
247                 (1<<MAX98926_BST_ILIM_SHIFT)-1, 0,
248                 max98926_current_tlv),
249         SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff),
250         SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS,
251                 MAX98926_PDM_CHANNEL_1_SHIFT,
252                 MAX98926_PDM_CHANNEL_1_HIZ, 1, 0),
253         SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS,
254                 MAX98926_PDM_CHANNEL_0_SHIFT,
255                 MAX98926_PDM_CHANNEL_0_HIZ, 1, 0),
256 };
257 
258 static const struct {
259         int rate;
260         int  sr;
261 } rate_table[] = {
262         {
263                 .rate = 8000,
264                 .sr = 0,
265         },
266         {
267                 .rate = 11025,
268                 .sr = 1,
269         },
270         {
271                 .rate = 12000,
272                 .sr = 2,
273         },
274         {
275                 .rate = 16000,
276                 .sr = 3,
277         },
278         {
279                 .rate = 22050,
280                 .sr = 4,
281         },
282         {
283                 .rate = 24000,
284                 .sr = 5,
285         },
286         {
287                 .rate = 32000,
288                 .sr = 6,
289         },
290         {
291                 .rate = 44100,
292                 .sr = 7,
293         },
294         {
295                 .rate = 48000,
296                 .sr = 8,
297         },
298 };
299 
300 static void max98926_set_sense_data(struct max98926_priv *max98926)
301 {
302         regmap_update_bits(max98926->regmap,
303                 MAX98926_DOUT_CFG_VMON,
304                 MAX98926_DAI_VMON_EN_MASK,
305                 MAX98926_DAI_VMON_EN_MASK);
306         regmap_update_bits(max98926->regmap,
307                 MAX98926_DOUT_CFG_IMON,
308                 MAX98926_DAI_IMON_EN_MASK,
309                 MAX98926_DAI_IMON_EN_MASK);
310 
311         if (!max98926->interleave_mode) {
312                 /* set VMON slots */
313                 regmap_update_bits(max98926->regmap,
314                         MAX98926_DOUT_CFG_VMON,
315                         MAX98926_DAI_VMON_SLOT_MASK,
316                         max98926->v_slot);
317                 /* set IMON slots */
318                 regmap_update_bits(max98926->regmap,
319                         MAX98926_DOUT_CFG_IMON,
320                         MAX98926_DAI_IMON_SLOT_MASK,
321                         max98926->i_slot);
322         } else {
323                 /* enable interleave mode */
324                 regmap_update_bits(max98926->regmap,
325                         MAX98926_FORMAT,
326                         MAX98926_DAI_INTERLEAVE_MASK,
327                         MAX98926_DAI_INTERLEAVE_MASK);
328                 /* set interleave slots */
329                 regmap_update_bits(max98926->regmap,
330                         MAX98926_DOUT_CFG_VBAT,
331                         MAX98926_DAI_INTERLEAVE_SLOT_MASK,
332                         max98926->v_slot);
333         }
334 }
335 
336 static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai,
337                 unsigned int fmt)
338 {
339         struct snd_soc_codec *codec = codec_dai->codec;
340         struct max98926_priv *max98926 = snd_soc_codec_get_drvdata(codec);
341         unsigned int invert = 0;
342 
343         dev_dbg(codec->dev, "%s: fmt 0x%08X\n", __func__, fmt);
344 
345         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
346         case SND_SOC_DAIFMT_CBS_CFS:
347                 max98926_set_sense_data(max98926);
348                 break;
349         default:
350                 dev_err(codec->dev, "DAI clock mode unsupported\n");
351                 return -EINVAL;
352         }
353 
354         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
355         case SND_SOC_DAIFMT_NB_NF:
356                 break;
357         case SND_SOC_DAIFMT_NB_IF:
358                 invert = MAX98926_DAI_WCI_MASK;
359                 break;
360         case SND_SOC_DAIFMT_IB_NF:
361                 invert = MAX98926_DAI_BCI_MASK;
362                 break;
363         case SND_SOC_DAIFMT_IB_IF:
364                 invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK;
365                 break;
366         default:
367                 dev_err(codec->dev, "DAI invert mode unsupported\n");
368                 return -EINVAL;
369         }
370 
371         regmap_write(max98926->regmap,
372                         MAX98926_FORMAT, MAX98926_DAI_DLY_MASK);
373         regmap_update_bits(max98926->regmap, MAX98926_FORMAT,
374                         MAX98926_DAI_BCI_MASK, invert);
375         return 0;
376 }
377 
378 static int max98926_dai_hw_params(struct snd_pcm_substream *substream,
379                 struct snd_pcm_hw_params *params,
380                 struct snd_soc_dai *dai)
381 {
382         int dai_sr = -EINVAL;
383         int rate = params_rate(params), i;
384         struct snd_soc_codec *codec = dai->codec;
385         struct max98926_priv *max98926 = snd_soc_codec_get_drvdata(codec);
386         int blr_clk_ratio;
387 
388         switch (params_format(params)) {
389         case SNDRV_PCM_FORMAT_S16_LE:
390                 regmap_update_bits(max98926->regmap,
391                         MAX98926_FORMAT,
392                         MAX98926_DAI_CHANSZ_MASK,
393                         MAX98926_DAI_CHANSZ_16);
394                 max98926->ch_size = 16;
395                 break;
396         case SNDRV_PCM_FORMAT_S24_LE:
397                 regmap_update_bits(max98926->regmap,
398                         MAX98926_FORMAT,
399                         MAX98926_DAI_CHANSZ_MASK,
400                         MAX98926_DAI_CHANSZ_24);
401                 max98926->ch_size = 24;
402                 break;
403         case SNDRV_PCM_FORMAT_S32_LE:
404                 regmap_update_bits(max98926->regmap,
405                         MAX98926_FORMAT,
406                         MAX98926_DAI_CHANSZ_MASK,
407                         MAX98926_DAI_CHANSZ_32);
408                 max98926->ch_size = 32;
409                 break;
410         default:
411                 dev_dbg(codec->dev, "format unsupported %d\n",
412                         params_format(params));
413                 return -EINVAL;
414         }
415 
416         /* BCLK/LRCLK ratio calculation */
417         blr_clk_ratio = params_channels(params) * max98926->ch_size;
418 
419         switch (blr_clk_ratio) {
420         case 32:
421                 regmap_update_bits(max98926->regmap,
422                         MAX98926_DAI_CLK_MODE2,
423                         MAX98926_DAI_BSEL_MASK,
424                         MAX98926_DAI_BSEL_32);
425                 break;
426         case 48:
427                 regmap_update_bits(max98926->regmap,
428                         MAX98926_DAI_CLK_MODE2,
429                         MAX98926_DAI_BSEL_MASK,
430                         MAX98926_DAI_BSEL_48);
431                 break;
432         case 64:
433                 regmap_update_bits(max98926->regmap,
434                         MAX98926_DAI_CLK_MODE2,
435                         MAX98926_DAI_BSEL_MASK,
436                         MAX98926_DAI_BSEL_64);
437                 break;
438         default:
439                 return -EINVAL;
440         }
441 
442         /* find the closest rate */
443         for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
444                 if (rate_table[i].rate >= rate) {
445                         dai_sr = rate_table[i].sr;
446                         break;
447                 }
448         }
449         if (dai_sr < 0)
450                 return -EINVAL;
451 
452         /* set DAI_SR to correct LRCLK frequency */
453         regmap_update_bits(max98926->regmap,
454                 MAX98926_DAI_CLK_MODE2,
455                 MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT);
456         return 0;
457 }
458 
459 #define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
460                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
461 
462 static const struct snd_soc_dai_ops max98926_dai_ops = {
463         .set_fmt = max98926_dai_set_fmt,
464         .hw_params = max98926_dai_hw_params,
465 };
466 
467 static struct snd_soc_dai_driver max98926_dai[] = {
468 {
469         .name = "max98926-aif1",
470         .playback = {
471                 .stream_name = "HiFi Playback",
472                 .channels_min = 1,
473                 .channels_max = 2,
474                 .rates = SNDRV_PCM_RATE_8000_48000,
475                 .formats = MAX98926_FORMATS,
476         },
477         .capture = {
478                 .stream_name = "HiFi Capture",
479                 .channels_min = 1,
480                 .channels_max = 2,
481                 .rates = SNDRV_PCM_RATE_8000_48000,
482                 .formats = MAX98926_FORMATS,
483         },
484         .ops = &max98926_dai_ops,
485 }
486 };
487 
488 static int max98926_probe(struct snd_soc_codec *codec)
489 {
490         struct max98926_priv *max98926 = snd_soc_codec_get_drvdata(codec);
491 
492         max98926->codec = codec;
493 
494         /* Hi-Z all the slots */
495         regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0);
496         return 0;
497 }
498 
499 static const struct snd_soc_codec_driver soc_codec_dev_max98926 = {
500         .probe  = max98926_probe,
501         .component_driver = {
502                 .controls               = max98926_snd_controls,
503                 .num_controls           = ARRAY_SIZE(max98926_snd_controls),
504                 .dapm_routes            = max98926_audio_map,
505                 .num_dapm_routes        = ARRAY_SIZE(max98926_audio_map),
506                 .dapm_widgets           = max98926_dapm_widgets,
507                 .num_dapm_widgets       = ARRAY_SIZE(max98926_dapm_widgets),
508         },
509 };
510 
511 static const struct regmap_config max98926_regmap = {
512         .reg_bits       = 8,
513         .val_bits       = 8,
514         .max_register   = MAX98926_VERSION,
515         .reg_defaults   = max98926_reg,
516         .num_reg_defaults = ARRAY_SIZE(max98926_reg),
517         .volatile_reg   = max98926_volatile_register,
518         .readable_reg   = max98926_readable_register,
519         .cache_type             = REGCACHE_RBTREE,
520 };
521 
522 static int max98926_i2c_probe(struct i2c_client *i2c,
523                 const struct i2c_device_id *id)
524 {
525         int ret, reg;
526         u32 value;
527         struct max98926_priv *max98926;
528 
529         max98926 = devm_kzalloc(&i2c->dev,
530                         sizeof(*max98926), GFP_KERNEL);
531         if (!max98926)
532                 return -ENOMEM;
533 
534         i2c_set_clientdata(i2c, max98926);
535         max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
536         if (IS_ERR(max98926->regmap)) {
537                 ret = PTR_ERR(max98926->regmap);
538                 dev_err(&i2c->dev,
539                                 "Failed to allocate regmap: %d\n", ret);
540                 goto err_out;
541         }
542         if (of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
543                 max98926->interleave_mode = true;
544 
545         if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
546                 if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
547                         dev_err(&i2c->dev, "vmon slot number is wrong:\n");
548                         return -EINVAL;
549                 }
550                 max98926->v_slot = value;
551         }
552         if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
553                 if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
554                         dev_err(&i2c->dev, "imon slot number is wrong:\n");
555                         return -EINVAL;
556                 }
557                 max98926->i_slot = value;
558         }
559         ret = regmap_read(max98926->regmap,
560                         MAX98926_VERSION, &reg);
561         if (ret < 0) {
562                 dev_err(&i2c->dev, "Failed to read: %x\n", reg);
563                 return ret;
564         }
565 
566         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98926,
567                         max98926_dai, ARRAY_SIZE(max98926_dai));
568         if (ret < 0)
569                 dev_err(&i2c->dev,
570                                 "Failed to register codec: %d\n", ret);
571         dev_info(&i2c->dev, "device version: %x\n", reg);
572 err_out:
573         return ret;
574 }
575 
576 static int max98926_i2c_remove(struct i2c_client *client)
577 {
578         snd_soc_unregister_codec(&client->dev);
579         return 0;
580 }
581 
582 static const struct i2c_device_id max98926_i2c_id[] = {
583         { "max98926", 0 },
584         { }
585 };
586 MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
587 
588 static const struct of_device_id max98926_of_match[] = {
589         { .compatible = "maxim,max98926", },
590         { }
591 };
592 MODULE_DEVICE_TABLE(of, max98926_of_match);
593 
594 static struct i2c_driver max98926_i2c_driver = {
595         .driver = {
596                 .name = "max98926",
597                 .of_match_table = of_match_ptr(max98926_of_match),
598                 .pm = NULL,
599         },
600         .probe  = max98926_i2c_probe,
601         .remove = max98926_i2c_remove,
602         .id_table = max98926_i2c_id,
603 };
604 
605 module_i2c_driver(max98926_i2c_driver)
606 MODULE_DESCRIPTION("ALSA SoC MAX98926 driver");
607 MODULE_AUTHOR("Anish kumar <anish.kumar@maximintegrated.com>");
608 MODULE_LICENSE("GPL");
609 

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