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Linux/sound/soc/codecs/max98926.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * max98926.c -- ALSA SoC MAX98926 driver
  4  * Copyright 2013-15 Maxim Integrated Products
  5  */
  6 #include <linux/delay.h>
  7 #include <linux/i2c.h>
  8 #include <linux/module.h>
  9 #include <linux/regmap.h>
 10 #include <linux/slab.h>
 11 #include <linux/cdev.h>
 12 #include <sound/pcm.h>
 13 #include <sound/pcm_params.h>
 14 #include <sound/soc.h>
 15 #include <sound/tlv.h>
 16 #include "max98926.h"
 17 
 18 static const char * const max98926_boost_voltage_txt[] = {
 19         "8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
 20         "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
 21 };
 22 
 23 static const char *const max98926_pdm_ch_text[] = {
 24         "Current", "Voltage",
 25 };
 26 
 27 static const char *const max98926_hpf_cutoff_txt[] = {
 28         "Disable", "DC Block", "100Hz",
 29         "200Hz", "400Hz", "800Hz",
 30 };
 31 
 32 static const struct reg_default max98926_reg[] = {
 33         { 0x0B, 0x00 }, /* IRQ Enable0 */
 34         { 0x0C, 0x00 }, /* IRQ Enable1 */
 35         { 0x0D, 0x00 }, /* IRQ Enable2 */
 36         { 0x0E, 0x00 }, /* IRQ Clear0 */
 37         { 0x0F, 0x00 }, /* IRQ Clear1 */
 38         { 0x10, 0x00 }, /* IRQ Clear2 */
 39         { 0x11, 0xC0 }, /* Map0 */
 40         { 0x12, 0x00 }, /* Map1 */
 41         { 0x13, 0x00 }, /* Map2 */
 42         { 0x14, 0xF0 }, /* Map3 */
 43         { 0x15, 0x00 }, /* Map4 */
 44         { 0x16, 0xAB }, /* Map5 */
 45         { 0x17, 0x89 }, /* Map6 */
 46         { 0x18, 0x00 }, /* Map7 */
 47         { 0x19, 0x00 }, /* Map8 */
 48         { 0x1A, 0x04 }, /* DAI Clock Mode 1 */
 49         { 0x1B, 0x00 }, /* DAI Clock Mode 2 */
 50         { 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
 51         { 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
 52         { 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
 53         { 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
 54         { 0x20, 0x50 }, /* Format */
 55         { 0x21, 0x00 }, /* TDM Slot Select */
 56         { 0x22, 0x00 }, /* DOUT Configuration VMON */
 57         { 0x23, 0x00 }, /* DOUT Configuration IMON */
 58         { 0x24, 0x00 }, /* DOUT Configuration VBAT */
 59         { 0x25, 0x00 }, /* DOUT Configuration VBST */
 60         { 0x26, 0x00 }, /* DOUT Configuration FLAG */
 61         { 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
 62         { 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
 63         { 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
 64         { 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
 65         { 0x2B, 0x02 }, /* DOUT Drive Strength */
 66         { 0x2C, 0x90 }, /* Filters */
 67         { 0x2D, 0x00 }, /* Gain */
 68         { 0x2E, 0x02 }, /* Gain Ramping */
 69         { 0x2F, 0x00 }, /* Speaker Amplifier */
 70         { 0x30, 0x0A }, /* Threshold */
 71         { 0x31, 0x00 }, /* ALC Attack */
 72         { 0x32, 0x80 }, /* ALC Atten and Release */
 73         { 0x33, 0x00 }, /* ALC Infinite Hold Release */
 74         { 0x34, 0x92 }, /* ALC Configuration */
 75         { 0x35, 0x01 }, /* Boost Converter */
 76         { 0x36, 0x00 }, /* Block Enable */
 77         { 0x37, 0x00 }, /* Configuration */
 78         { 0x38, 0x00 }, /* Global Enable */
 79         { 0x3A, 0x00 }, /* Boost Limiter */
 80 };
 81 
 82 static const struct soc_enum max98926_voltage_enum[] = {
 83         SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0,
 84                 ARRAY_SIZE(max98926_pdm_ch_text),
 85                 max98926_pdm_ch_text),
 86 };
 87 
 88 static const struct snd_kcontrol_new max98926_voltage_control =
 89         SOC_DAPM_ENUM("Route", max98926_voltage_enum);
 90 
 91 static const struct soc_enum max98926_current_enum[] = {
 92         SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS,
 93                 MAX98926_PDM_SOURCE_1_SHIFT,
 94                 ARRAY_SIZE(max98926_pdm_ch_text),
 95                 max98926_pdm_ch_text),
 96 };
 97 
 98 static const struct snd_kcontrol_new max98926_current_control =
 99         SOC_DAPM_ENUM("Route", max98926_current_enum);
100 
101 static const struct snd_kcontrol_new max98926_mixer_controls[] = {
102         SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP,
103                 MAX98926_INSELECT_MODE_SHIFT, 0, 0),
104         SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP,
105                 MAX98926_INSELECT_MODE_SHIFT, 1, 0),
106 };
107 
108 static const struct snd_kcontrol_new max98926_dai_controls[] = {
109         SOC_DAPM_SINGLE("Left", MAX98926_GAIN,
110                 MAX98926_DAC_IN_SEL_SHIFT, 0, 0),
111         SOC_DAPM_SINGLE("Right", MAX98926_GAIN,
112                 MAX98926_DAC_IN_SEL_SHIFT, 1, 0),
113         SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN,
114                 MAX98926_DAC_IN_SEL_SHIFT, 2, 0),
115         SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN,
116                 MAX98926_DAC_IN_SEL_SHIFT, 3, 0),
117 };
118 
119 static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = {
120         SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0,
121                 SND_SOC_NOPM, 0, 0),
122         SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE,
123                 MAX98926_SPK_EN_SHIFT, 0),
124         SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE,
125                 MAX98926_EN_SHIFT, 0, NULL, 0),
126         SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE,
127                 MAX98926_ADC_IMON_EN_WIDTH |
128                 MAX98926_ADC_VMON_EN_SHIFT,
129                 0, NULL, 0),
130         SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE,
131                 MAX98926_BST_EN_SHIFT, 0, NULL, 0),
132         SND_SOC_DAPM_OUTPUT("BE_OUT"),
133         SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP,
134                 MAX98926_INSELECT_MODE_SHIFT, 0,
135                 &max98926_mixer_controls[0],
136                 ARRAY_SIZE(max98926_mixer_controls)),
137         SND_SOC_DAPM_MIXER("DAI Sel",
138                 MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0,
139                 &max98926_dai_controls[0],
140                 ARRAY_SIZE(max98926_dai_controls)),
141         SND_SOC_DAPM_MUX("PDM CH1 Source",
142                 MAX98926_DAI_CLK_DIV_N_LSBS,
143                 MAX98926_PDM_CURRENT_SHIFT,
144                 0, &max98926_current_control),
145         SND_SOC_DAPM_MUX("PDM CH0 Source",
146                 MAX98926_DAI_CLK_DIV_N_LSBS,
147                 MAX98926_PDM_VOLTAGE_SHIFT,
148                 0, &max98926_voltage_control),
149 };
150 
151 static const struct snd_soc_dapm_route max98926_audio_map[] = {
152         {"VI Enable", NULL, "DAI_OUT"},
153         {"DAI Sel", "Left", "VI Enable"},
154         {"DAI Sel", "Right", "VI Enable"},
155         {"DAI Sel", "LeftRight", "VI Enable"},
156         {"DAI Sel", "LeftRightDiv2", "VI Enable"},
157         {"PCM Sel", "PCM", "DAI Sel"},
158 
159         {"PDM CH1 Source", "Current", "DAI_OUT"},
160         {"PDM CH1 Source", "Voltage", "DAI_OUT"},
161         {"PDM CH0 Source", "Current", "DAI_OUT"},
162         {"PDM CH0 Source", "Voltage", "DAI_OUT"},
163         {"PCM Sel", "Analog", "PDM CH1 Source"},
164         {"PCM Sel", "Analog", "PDM CH0 Source"},
165         {"Amp Enable", NULL, "PCM Sel"},
166 
167         {"BST Enable", NULL, "Amp Enable"},
168         {"BE_OUT", NULL, "BST Enable"},
169 };
170 
171 static bool max98926_volatile_register(struct device *dev, unsigned int reg)
172 {
173         switch (reg) {
174         case MAX98926_VBAT_DATA:
175         case MAX98926_VBST_DATA:
176         case MAX98926_LIVE_STATUS0:
177         case MAX98926_LIVE_STATUS1:
178         case MAX98926_LIVE_STATUS2:
179         case MAX98926_STATE0:
180         case MAX98926_STATE1:
181         case MAX98926_STATE2:
182         case MAX98926_FLAG0:
183         case MAX98926_FLAG1:
184         case MAX98926_FLAG2:
185         case MAX98926_VERSION:
186                 return true;
187         default:
188                 return false;
189         }
190 }
191 
192 static bool max98926_readable_register(struct device *dev, unsigned int reg)
193 {
194         switch (reg) {
195         case MAX98926_IRQ_CLEAR0:
196         case MAX98926_IRQ_CLEAR1:
197         case MAX98926_IRQ_CLEAR2:
198         case MAX98926_ALC_HOLD_RLS:
199                 return false;
200         default:
201                 return true;
202         }
203 };
204 
205 static DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0);
206 static DECLARE_TLV_DB_RANGE(max98926_current_tlv,
207         0, 11, TLV_DB_SCALE_ITEM(20, 20, 0),
208         12, 15, TLV_DB_SCALE_ITEM(320, 40, 0),
209 );
210 
211 static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff,
212                 MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT,
213                 max98926_hpf_cutoff_txt);
214 
215 static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage,
216                 MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT,
217                 max98926_boost_voltage_txt);
218 
219 static const struct snd_kcontrol_new max98926_snd_controls[] = {
220         SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN,
221                 MAX98926_SPK_GAIN_SHIFT,
222                 (1<<MAX98926_SPK_GAIN_WIDTH)-1, 0,
223                 max98926_spk_tlv),
224         SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING,
225                 MAX98926_SPK_RMP_EN_SHIFT, 1, 0),
226         SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING,
227                 MAX98926_SPK_ZCD_EN_SHIFT, 1, 0),
228         SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD,
229                 MAX98926_ALC_EN_SHIFT, 1, 0),
230         SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD,
231                 MAX98926_ALC_TH_SHIFT,
232                 (1<<MAX98926_ALC_TH_WIDTH)-1, 0),
233         SOC_ENUM("Boost Output Voltage", max98926_boost_voltage),
234         SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER,
235                 MAX98926_BST_ILIM_SHIFT,
236                 (1<<MAX98926_BST_ILIM_SHIFT)-1, 0,
237                 max98926_current_tlv),
238         SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff),
239         SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS,
240                 MAX98926_PDM_CHANNEL_1_SHIFT,
241                 MAX98926_PDM_CHANNEL_1_HIZ, 1, 0),
242         SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS,
243                 MAX98926_PDM_CHANNEL_0_SHIFT,
244                 MAX98926_PDM_CHANNEL_0_HIZ, 1, 0),
245 };
246 
247 static const struct {
248         int rate;
249         int  sr;
250 } rate_table[] = {
251         {
252                 .rate = 8000,
253                 .sr = 0,
254         },
255         {
256                 .rate = 11025,
257                 .sr = 1,
258         },
259         {
260                 .rate = 12000,
261                 .sr = 2,
262         },
263         {
264                 .rate = 16000,
265                 .sr = 3,
266         },
267         {
268                 .rate = 22050,
269                 .sr = 4,
270         },
271         {
272                 .rate = 24000,
273                 .sr = 5,
274         },
275         {
276                 .rate = 32000,
277                 .sr = 6,
278         },
279         {
280                 .rate = 44100,
281                 .sr = 7,
282         },
283         {
284                 .rate = 48000,
285                 .sr = 8,
286         },
287 };
288 
289 static void max98926_set_sense_data(struct max98926_priv *max98926)
290 {
291         regmap_update_bits(max98926->regmap,
292                 MAX98926_DOUT_CFG_VMON,
293                 MAX98926_DAI_VMON_EN_MASK,
294                 MAX98926_DAI_VMON_EN_MASK);
295         regmap_update_bits(max98926->regmap,
296                 MAX98926_DOUT_CFG_IMON,
297                 MAX98926_DAI_IMON_EN_MASK,
298                 MAX98926_DAI_IMON_EN_MASK);
299 
300         if (!max98926->interleave_mode) {
301                 /* set VMON slots */
302                 regmap_update_bits(max98926->regmap,
303                         MAX98926_DOUT_CFG_VMON,
304                         MAX98926_DAI_VMON_SLOT_MASK,
305                         max98926->v_slot);
306                 /* set IMON slots */
307                 regmap_update_bits(max98926->regmap,
308                         MAX98926_DOUT_CFG_IMON,
309                         MAX98926_DAI_IMON_SLOT_MASK,
310                         max98926->i_slot);
311         } else {
312                 /* enable interleave mode */
313                 regmap_update_bits(max98926->regmap,
314                         MAX98926_FORMAT,
315                         MAX98926_DAI_INTERLEAVE_MASK,
316                         MAX98926_DAI_INTERLEAVE_MASK);
317                 /* set interleave slots */
318                 regmap_update_bits(max98926->regmap,
319                         MAX98926_DOUT_CFG_VBAT,
320                         MAX98926_DAI_INTERLEAVE_SLOT_MASK,
321                         max98926->v_slot);
322         }
323 }
324 
325 static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai,
326                 unsigned int fmt)
327 {
328         struct snd_soc_component *component = codec_dai->component;
329         struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
330         unsigned int invert = 0;
331 
332         dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
333 
334         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
335         case SND_SOC_DAIFMT_CBS_CFS:
336                 max98926_set_sense_data(max98926);
337                 break;
338         default:
339                 dev_err(component->dev, "DAI clock mode unsupported\n");
340                 return -EINVAL;
341         }
342 
343         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
344         case SND_SOC_DAIFMT_NB_NF:
345                 break;
346         case SND_SOC_DAIFMT_NB_IF:
347                 invert = MAX98926_DAI_WCI_MASK;
348                 break;
349         case SND_SOC_DAIFMT_IB_NF:
350                 invert = MAX98926_DAI_BCI_MASK;
351                 break;
352         case SND_SOC_DAIFMT_IB_IF:
353                 invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK;
354                 break;
355         default:
356                 dev_err(component->dev, "DAI invert mode unsupported\n");
357                 return -EINVAL;
358         }
359 
360         regmap_write(max98926->regmap,
361                         MAX98926_FORMAT, MAX98926_DAI_DLY_MASK);
362         regmap_update_bits(max98926->regmap, MAX98926_FORMAT,
363                         MAX98926_DAI_BCI_MASK, invert);
364         return 0;
365 }
366 
367 static int max98926_dai_hw_params(struct snd_pcm_substream *substream,
368                 struct snd_pcm_hw_params *params,
369                 struct snd_soc_dai *dai)
370 {
371         int dai_sr = -EINVAL;
372         int rate = params_rate(params), i;
373         struct snd_soc_component *component = dai->component;
374         struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
375         int blr_clk_ratio;
376 
377         switch (params_format(params)) {
378         case SNDRV_PCM_FORMAT_S16_LE:
379                 regmap_update_bits(max98926->regmap,
380                         MAX98926_FORMAT,
381                         MAX98926_DAI_CHANSZ_MASK,
382                         MAX98926_DAI_CHANSZ_16);
383                 max98926->ch_size = 16;
384                 break;
385         case SNDRV_PCM_FORMAT_S24_LE:
386                 regmap_update_bits(max98926->regmap,
387                         MAX98926_FORMAT,
388                         MAX98926_DAI_CHANSZ_MASK,
389                         MAX98926_DAI_CHANSZ_24);
390                 max98926->ch_size = 24;
391                 break;
392         case SNDRV_PCM_FORMAT_S32_LE:
393                 regmap_update_bits(max98926->regmap,
394                         MAX98926_FORMAT,
395                         MAX98926_DAI_CHANSZ_MASK,
396                         MAX98926_DAI_CHANSZ_32);
397                 max98926->ch_size = 32;
398                 break;
399         default:
400                 dev_dbg(component->dev, "format unsupported %d\n",
401                         params_format(params));
402                 return -EINVAL;
403         }
404 
405         /* BCLK/LRCLK ratio calculation */
406         blr_clk_ratio = params_channels(params) * max98926->ch_size;
407 
408         switch (blr_clk_ratio) {
409         case 32:
410                 regmap_update_bits(max98926->regmap,
411                         MAX98926_DAI_CLK_MODE2,
412                         MAX98926_DAI_BSEL_MASK,
413                         MAX98926_DAI_BSEL_32);
414                 break;
415         case 48:
416                 regmap_update_bits(max98926->regmap,
417                         MAX98926_DAI_CLK_MODE2,
418                         MAX98926_DAI_BSEL_MASK,
419                         MAX98926_DAI_BSEL_48);
420                 break;
421         case 64:
422                 regmap_update_bits(max98926->regmap,
423                         MAX98926_DAI_CLK_MODE2,
424                         MAX98926_DAI_BSEL_MASK,
425                         MAX98926_DAI_BSEL_64);
426                 break;
427         default:
428                 return -EINVAL;
429         }
430 
431         /* find the closest rate */
432         for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
433                 if (rate_table[i].rate >= rate) {
434                         dai_sr = rate_table[i].sr;
435                         break;
436                 }
437         }
438         if (dai_sr < 0)
439                 return -EINVAL;
440 
441         /* set DAI_SR to correct LRCLK frequency */
442         regmap_update_bits(max98926->regmap,
443                 MAX98926_DAI_CLK_MODE2,
444                 MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT);
445         return 0;
446 }
447 
448 #define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
449                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
450 
451 static const struct snd_soc_dai_ops max98926_dai_ops = {
452         .set_fmt = max98926_dai_set_fmt,
453         .hw_params = max98926_dai_hw_params,
454 };
455 
456 static struct snd_soc_dai_driver max98926_dai[] = {
457 {
458         .name = "max98926-aif1",
459         .playback = {
460                 .stream_name = "HiFi Playback",
461                 .channels_min = 1,
462                 .channels_max = 2,
463                 .rates = SNDRV_PCM_RATE_8000_48000,
464                 .formats = MAX98926_FORMATS,
465         },
466         .capture = {
467                 .stream_name = "HiFi Capture",
468                 .channels_min = 1,
469                 .channels_max = 2,
470                 .rates = SNDRV_PCM_RATE_8000_48000,
471                 .formats = MAX98926_FORMATS,
472         },
473         .ops = &max98926_dai_ops,
474 }
475 };
476 
477 static int max98926_probe(struct snd_soc_component *component)
478 {
479         struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
480 
481         max98926->component = component;
482 
483         /* Hi-Z all the slots */
484         regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0);
485         return 0;
486 }
487 
488 static const struct snd_soc_component_driver soc_component_dev_max98926 = {
489         .probe                  = max98926_probe,
490         .controls               = max98926_snd_controls,
491         .num_controls           = ARRAY_SIZE(max98926_snd_controls),
492         .dapm_routes            = max98926_audio_map,
493         .num_dapm_routes        = ARRAY_SIZE(max98926_audio_map),
494         .dapm_widgets           = max98926_dapm_widgets,
495         .num_dapm_widgets       = ARRAY_SIZE(max98926_dapm_widgets),
496         .idle_bias_on           = 1,
497         .use_pmdown_time        = 1,
498         .endianness             = 1,
499         .non_legacy_dai_naming  = 1,
500 };
501 
502 static const struct regmap_config max98926_regmap = {
503         .reg_bits       = 8,
504         .val_bits       = 8,
505         .max_register   = MAX98926_VERSION,
506         .reg_defaults   = max98926_reg,
507         .num_reg_defaults = ARRAY_SIZE(max98926_reg),
508         .volatile_reg   = max98926_volatile_register,
509         .readable_reg   = max98926_readable_register,
510         .cache_type             = REGCACHE_RBTREE,
511 };
512 
513 static int max98926_i2c_probe(struct i2c_client *i2c,
514                 const struct i2c_device_id *id)
515 {
516         int ret, reg;
517         u32 value;
518         struct max98926_priv *max98926;
519 
520         max98926 = devm_kzalloc(&i2c->dev,
521                         sizeof(*max98926), GFP_KERNEL);
522         if (!max98926)
523                 return -ENOMEM;
524 
525         i2c_set_clientdata(i2c, max98926);
526         max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
527         if (IS_ERR(max98926->regmap)) {
528                 ret = PTR_ERR(max98926->regmap);
529                 dev_err(&i2c->dev,
530                                 "Failed to allocate regmap: %d\n", ret);
531                 goto err_out;
532         }
533         if (of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
534                 max98926->interleave_mode = true;
535 
536         if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
537                 if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
538                         dev_err(&i2c->dev, "vmon slot number is wrong:\n");
539                         return -EINVAL;
540                 }
541                 max98926->v_slot = value;
542         }
543         if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
544                 if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
545                         dev_err(&i2c->dev, "imon slot number is wrong:\n");
546                         return -EINVAL;
547                 }
548                 max98926->i_slot = value;
549         }
550         ret = regmap_read(max98926->regmap,
551                         MAX98926_VERSION, &reg);
552         if (ret < 0) {
553                 dev_err(&i2c->dev, "Failed to read: %x\n", reg);
554                 return ret;
555         }
556 
557         ret = devm_snd_soc_register_component(&i2c->dev,
558                         &soc_component_dev_max98926,
559                         max98926_dai, ARRAY_SIZE(max98926_dai));
560         if (ret < 0)
561                 dev_err(&i2c->dev,
562                                 "Failed to register component: %d\n", ret);
563         dev_info(&i2c->dev, "device version: %x\n", reg);
564 err_out:
565         return ret;
566 }
567 
568 static const struct i2c_device_id max98926_i2c_id[] = {
569         { "max98926", 0 },
570         { }
571 };
572 MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
573 
574 static const struct of_device_id max98926_of_match[] = {
575         { .compatible = "maxim,max98926", },
576         { }
577 };
578 MODULE_DEVICE_TABLE(of, max98926_of_match);
579 
580 static struct i2c_driver max98926_i2c_driver = {
581         .driver = {
582                 .name = "max98926",
583                 .of_match_table = of_match_ptr(max98926_of_match),
584                 .pm = NULL,
585         },
586         .probe  = max98926_i2c_probe,
587         .id_table = max98926_i2c_id,
588 };
589 
590 module_i2c_driver(max98926_i2c_driver)
591 MODULE_DESCRIPTION("ALSA SoC MAX98926 driver");
592 MODULE_AUTHOR("Anish kumar <anish.kumar@maximintegrated.com>");
593 MODULE_LICENSE("GPL");
594 

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