1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2017, Maxim Integrated
3
4#include <linux/acpi.h>
5#include <linux/delay.h>
6#include <linux/i2c.h>
7#include <linux/module.h>
8#include <linux/mod_devicetable.h>
9#include <linux/of.h>
10#include <linux/pm.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 "max98373.h"
19
20static const u32 max98373_i2c_cache_reg[] = {
21 MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK,
22 MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK,
23 MAX98373_R20B6_BDE_CUR_STATE_READBACK,
24};
25
26static const struct reg_default max98373_reg[] = {
27 {MAX98373_R2000_SW_RESET, 0x00},
28 {MAX98373_R2001_INT_RAW1, 0x00},
29 {MAX98373_R2002_INT_RAW2, 0x00},
30 {MAX98373_R2003_INT_RAW3, 0x00},
31 {MAX98373_R2004_INT_STATE1, 0x00},
32 {MAX98373_R2005_INT_STATE2, 0x00},
33 {MAX98373_R2006_INT_STATE3, 0x00},
34 {MAX98373_R2007_INT_FLAG1, 0x00},
35 {MAX98373_R2008_INT_FLAG2, 0x00},
36 {MAX98373_R2009_INT_FLAG3, 0x00},
37 {MAX98373_R200A_INT_EN1, 0x00},
38 {MAX98373_R200B_INT_EN2, 0x00},
39 {MAX98373_R200C_INT_EN3, 0x00},
40 {MAX98373_R200D_INT_FLAG_CLR1, 0x00},
41 {MAX98373_R200E_INT_FLAG_CLR2, 0x00},
42 {MAX98373_R200F_INT_FLAG_CLR3, 0x00},
43 {MAX98373_R2010_IRQ_CTRL, 0x00},
44 {MAX98373_R2014_THERM_WARN_THRESH, 0x10},
45 {MAX98373_R2015_THERM_SHDN_THRESH, 0x27},
46 {MAX98373_R2016_THERM_HYSTERESIS, 0x01},
47 {MAX98373_R2017_THERM_FOLDBACK_SET, 0xC0},
48 {MAX98373_R2018_THERM_FOLDBACK_EN, 0x00},
49 {MAX98373_R201E_PIN_DRIVE_STRENGTH, 0x55},
50 {MAX98373_R2020_PCM_TX_HIZ_EN_1, 0xFE},
51 {MAX98373_R2021_PCM_TX_HIZ_EN_2, 0xFF},
52 {MAX98373_R2022_PCM_TX_SRC_1, 0x00},
53 {MAX98373_R2023_PCM_TX_SRC_2, 0x00},
54 {MAX98373_R2024_PCM_DATA_FMT_CFG, 0xC0},
55 {MAX98373_R2025_AUDIO_IF_MODE, 0x00},
56 {MAX98373_R2026_PCM_CLOCK_RATIO, 0x04},
57 {MAX98373_R2027_PCM_SR_SETUP_1, 0x08},
58 {MAX98373_R2028_PCM_SR_SETUP_2, 0x88},
59 {MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1, 0x00},
60 {MAX98373_R202A_PCM_TO_SPK_MONO_MIX_2, 0x00},
61 {MAX98373_R202B_PCM_RX_EN, 0x00},
62 {MAX98373_R202C_PCM_TX_EN, 0x00},
63 {MAX98373_R202E_ICC_RX_CH_EN_1, 0x00},
64 {MAX98373_R202F_ICC_RX_CH_EN_2, 0x00},
65 {MAX98373_R2030_ICC_TX_HIZ_EN_1, 0xFF},
66 {MAX98373_R2031_ICC_TX_HIZ_EN_2, 0xFF},
67 {MAX98373_R2032_ICC_LINK_EN_CFG, 0x30},
68 {MAX98373_R2034_ICC_TX_CNTL, 0x00},
69 {MAX98373_R2035_ICC_TX_EN, 0x00},
70 {MAX98373_R2036_SOUNDWIRE_CTRL, 0x05},
71 {MAX98373_R203D_AMP_DIG_VOL_CTRL, 0x00},
72 {MAX98373_R203E_AMP_PATH_GAIN, 0x08},
73 {MAX98373_R203F_AMP_DSP_CFG, 0x02},
74 {MAX98373_R2040_TONE_GEN_CFG, 0x00},
75 {MAX98373_R2041_AMP_CFG, 0x03},
76 {MAX98373_R2042_AMP_EDGE_RATE_CFG, 0x00},
77 {MAX98373_R2043_AMP_EN, 0x00},
78 {MAX98373_R2046_IV_SENSE_ADC_DSP_CFG, 0x04},
79 {MAX98373_R2047_IV_SENSE_ADC_EN, 0x00},
80 {MAX98373_R2051_MEAS_ADC_SAMPLING_RATE, 0x00},
81 {MAX98373_R2052_MEAS_ADC_PVDD_FLT_CFG, 0x00},
82 {MAX98373_R2053_MEAS_ADC_THERM_FLT_CFG, 0x00},
83 {MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK, 0x00},
84 {MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK, 0x00},
85 {MAX98373_R2056_MEAS_ADC_PVDD_CH_EN, 0x00},
86 {MAX98373_R2090_BDE_LVL_HOLD, 0x00},
87 {MAX98373_R2091_BDE_GAIN_ATK_REL_RATE, 0x00},
88 {MAX98373_R2092_BDE_CLIPPER_MODE, 0x00},
89 {MAX98373_R2097_BDE_L1_THRESH, 0x00},
90 {MAX98373_R2098_BDE_L2_THRESH, 0x00},
91 {MAX98373_R2099_BDE_L3_THRESH, 0x00},
92 {MAX98373_R209A_BDE_L4_THRESH, 0x00},
93 {MAX98373_R209B_BDE_THRESH_HYST, 0x00},
94 {MAX98373_R20A8_BDE_L1_CFG_1, 0x00},
95 {MAX98373_R20A9_BDE_L1_CFG_2, 0x00},
96 {MAX98373_R20AA_BDE_L1_CFG_3, 0x00},
97 {MAX98373_R20AB_BDE_L2_CFG_1, 0x00},
98 {MAX98373_R20AC_BDE_L2_CFG_2, 0x00},
99 {MAX98373_R20AD_BDE_L2_CFG_3, 0x00},
100 {MAX98373_R20AE_BDE_L3_CFG_1, 0x00},
101 {MAX98373_R20AF_BDE_L3_CFG_2, 0x00},
102 {MAX98373_R20B0_BDE_L3_CFG_3, 0x00},
103 {MAX98373_R20B1_BDE_L4_CFG_1, 0x00},
104 {MAX98373_R20B2_BDE_L4_CFG_2, 0x00},
105 {MAX98373_R20B3_BDE_L4_CFG_3, 0x00},
106 {MAX98373_R20B4_BDE_INFINITE_HOLD_RELEASE, 0x00},
107 {MAX98373_R20B5_BDE_EN, 0x00},
108 {MAX98373_R20B6_BDE_CUR_STATE_READBACK, 0x00},
109 {MAX98373_R20D1_DHT_CFG, 0x01},
110 {MAX98373_R20D2_DHT_ATTACK_CFG, 0x02},
111 {MAX98373_R20D3_DHT_RELEASE_CFG, 0x03},
112 {MAX98373_R20D4_DHT_EN, 0x00},
113 {MAX98373_R20E0_LIMITER_THRESH_CFG, 0x00},
114 {MAX98373_R20E1_LIMITER_ATK_REL_RATES, 0x00},
115 {MAX98373_R20E2_LIMITER_EN, 0x00},
116 {MAX98373_R20FE_DEVICE_AUTO_RESTART_CFG, 0x00},
117 {MAX98373_R20FF_GLOBAL_SHDN, 0x00},
118 {MAX98373_R21FF_REV_ID, 0x42},
119};
120
121static int max98373_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
122{
123 struct snd_soc_component *component = codec_dai->component;
124 struct max98373_priv *max98373 = snd_soc_component_get_drvdata(c: component);
125 unsigned int format = 0;
126 unsigned int invert = 0;
127
128 dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
129
130 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
131 case SND_SOC_DAIFMT_NB_NF:
132 break;
133 case SND_SOC_DAIFMT_IB_NF:
134 invert = MAX98373_PCM_MODE_CFG_PCM_BCLKEDGE;
135 break;
136 default:
137 dev_err(component->dev, "DAI invert mode unsupported\n");
138 return -EINVAL;
139 }
140
141 regmap_update_bits(map: max98373->regmap,
142 MAX98373_R2026_PCM_CLOCK_RATIO,
143 MAX98373_PCM_MODE_CFG_PCM_BCLKEDGE,
144 val: invert);
145
146 /* interface format */
147 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
148 case SND_SOC_DAIFMT_I2S:
149 format = MAX98373_PCM_FORMAT_I2S;
150 break;
151 case SND_SOC_DAIFMT_LEFT_J:
152 format = MAX98373_PCM_FORMAT_LJ;
153 break;
154 case SND_SOC_DAIFMT_DSP_A:
155 format = MAX98373_PCM_FORMAT_TDM_MODE1;
156 break;
157 case SND_SOC_DAIFMT_DSP_B:
158 format = MAX98373_PCM_FORMAT_TDM_MODE0;
159 break;
160 default:
161 return -EINVAL;
162 }
163
164 regmap_update_bits(map: max98373->regmap,
165 MAX98373_R2024_PCM_DATA_FMT_CFG,
166 MAX98373_PCM_MODE_CFG_FORMAT_MASK,
167 val: format << MAX98373_PCM_MODE_CFG_FORMAT_SHIFT);
168
169 return 0;
170}
171
172/* BCLKs per LRCLK */
173static const int bclk_sel_table[] = {
174 32, 48, 64, 96, 128, 192, 256, 384, 512, 320,
175};
176
177static int max98373_get_bclk_sel(int bclk)
178{
179 int i;
180 /* match BCLKs per LRCLK */
181 for (i = 0; i < ARRAY_SIZE(bclk_sel_table); i++) {
182 if (bclk_sel_table[i] == bclk)
183 return i + 2;
184 }
185 return 0;
186}
187
188static int max98373_set_clock(struct snd_soc_component *component,
189 struct snd_pcm_hw_params *params)
190{
191 struct max98373_priv *max98373 = snd_soc_component_get_drvdata(c: component);
192 /* BCLK/LRCLK ratio calculation */
193 int blr_clk_ratio = params_channels(p: params) * max98373->ch_size;
194 int value;
195
196 if (!max98373->tdm_mode) {
197 /* BCLK configuration */
198 value = max98373_get_bclk_sel(bclk: blr_clk_ratio);
199 if (!value) {
200 dev_err(component->dev, "format unsupported %d\n",
201 params_format(params));
202 return -EINVAL;
203 }
204
205 regmap_update_bits(map: max98373->regmap,
206 MAX98373_R2026_PCM_CLOCK_RATIO,
207 MAX98373_PCM_CLK_SETUP_BSEL_MASK,
208 val: value);
209 }
210 return 0;
211}
212
213static int max98373_dai_hw_params(struct snd_pcm_substream *substream,
214 struct snd_pcm_hw_params *params,
215 struct snd_soc_dai *dai)
216{
217 struct snd_soc_component *component = dai->component;
218 struct max98373_priv *max98373 = snd_soc_component_get_drvdata(c: component);
219 unsigned int sampling_rate = 0;
220 unsigned int chan_sz = 0;
221
222 /* pcm mode configuration */
223 switch (snd_pcm_format_width(format: params_format(p: params))) {
224 case 16:
225 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_16;
226 break;
227 case 24:
228 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_24;
229 break;
230 case 32:
231 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_32;
232 break;
233 default:
234 dev_err(component->dev, "format unsupported %d\n",
235 params_format(params));
236 goto err;
237 }
238
239 max98373->ch_size = snd_pcm_format_width(format: params_format(p: params));
240
241 regmap_update_bits(map: max98373->regmap,
242 MAX98373_R2024_PCM_DATA_FMT_CFG,
243 MAX98373_PCM_MODE_CFG_CHANSZ_MASK, val: chan_sz);
244
245 dev_dbg(component->dev, "format supported %d",
246 params_format(params));
247
248 /* sampling rate configuration */
249 switch (params_rate(p: params)) {
250 case 8000:
251 sampling_rate = MAX98373_PCM_SR_SET1_SR_8000;
252 break;
253 case 11025:
254 sampling_rate = MAX98373_PCM_SR_SET1_SR_11025;
255 break;
256 case 12000:
257 sampling_rate = MAX98373_PCM_SR_SET1_SR_12000;
258 break;
259 case 16000:
260 sampling_rate = MAX98373_PCM_SR_SET1_SR_16000;
261 break;
262 case 22050:
263 sampling_rate = MAX98373_PCM_SR_SET1_SR_22050;
264 break;
265 case 24000:
266 sampling_rate = MAX98373_PCM_SR_SET1_SR_24000;
267 break;
268 case 32000:
269 sampling_rate = MAX98373_PCM_SR_SET1_SR_32000;
270 break;
271 case 44100:
272 sampling_rate = MAX98373_PCM_SR_SET1_SR_44100;
273 break;
274 case 48000:
275 sampling_rate = MAX98373_PCM_SR_SET1_SR_48000;
276 break;
277 case 88200:
278 sampling_rate = MAX98373_PCM_SR_SET1_SR_88200;
279 break;
280 case 96000:
281 sampling_rate = MAX98373_PCM_SR_SET1_SR_96000;
282 break;
283 default:
284 dev_err(component->dev, "rate %d not supported\n",
285 params_rate(params));
286 goto err;
287 }
288
289 /* set DAI_SR to correct LRCLK frequency */
290 regmap_update_bits(map: max98373->regmap,
291 MAX98373_R2027_PCM_SR_SETUP_1,
292 MAX98373_PCM_SR_SET1_SR_MASK,
293 val: sampling_rate);
294 regmap_update_bits(map: max98373->regmap,
295 MAX98373_R2028_PCM_SR_SETUP_2,
296 MAX98373_PCM_SR_SET2_SR_MASK,
297 val: sampling_rate << MAX98373_PCM_SR_SET2_SR_SHIFT);
298
299 /* set sampling rate of IV */
300 if (max98373->interleave_mode &&
301 sampling_rate > MAX98373_PCM_SR_SET1_SR_16000)
302 regmap_update_bits(map: max98373->regmap,
303 MAX98373_R2028_PCM_SR_SETUP_2,
304 MAX98373_PCM_SR_SET2_IVADC_SR_MASK,
305 val: sampling_rate - 3);
306 else
307 regmap_update_bits(map: max98373->regmap,
308 MAX98373_R2028_PCM_SR_SETUP_2,
309 MAX98373_PCM_SR_SET2_IVADC_SR_MASK,
310 val: sampling_rate);
311
312 return max98373_set_clock(component, params);
313err:
314 return -EINVAL;
315}
316
317static int max98373_dai_tdm_slot(struct snd_soc_dai *dai,
318 unsigned int tx_mask, unsigned int rx_mask,
319 int slots, int slot_width)
320{
321 struct snd_soc_component *component = dai->component;
322 struct max98373_priv *max98373 = snd_soc_component_get_drvdata(c: component);
323 int bsel = 0;
324 unsigned int chan_sz = 0;
325 unsigned int mask;
326 int x, slot_found;
327
328 if (!tx_mask && !rx_mask && !slots && !slot_width)
329 max98373->tdm_mode = false;
330 else
331 max98373->tdm_mode = true;
332
333 /* BCLK configuration */
334 bsel = max98373_get_bclk_sel(bclk: slots * slot_width);
335 if (bsel == 0) {
336 dev_err(component->dev, "BCLK %d not supported\n",
337 slots * slot_width);
338 return -EINVAL;
339 }
340
341 regmap_update_bits(map: max98373->regmap,
342 MAX98373_R2026_PCM_CLOCK_RATIO,
343 MAX98373_PCM_CLK_SETUP_BSEL_MASK,
344 val: bsel);
345
346 /* Channel size configuration */
347 switch (slot_width) {
348 case 16:
349 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_16;
350 break;
351 case 24:
352 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_24;
353 break;
354 case 32:
355 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_32;
356 break;
357 default:
358 dev_err(component->dev, "format unsupported %d\n",
359 slot_width);
360 return -EINVAL;
361 }
362
363 regmap_update_bits(map: max98373->regmap,
364 MAX98373_R2024_PCM_DATA_FMT_CFG,
365 MAX98373_PCM_MODE_CFG_CHANSZ_MASK, val: chan_sz);
366
367 /* Rx slot configuration */
368 slot_found = 0;
369 mask = rx_mask;
370 for (x = 0 ; x < 16 ; x++, mask >>= 1) {
371 if (mask & 0x1) {
372 if (slot_found == 0)
373 regmap_update_bits(map: max98373->regmap,
374 MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1,
375 MAX98373_PCM_TO_SPK_CH0_SRC_MASK, val: x);
376 else
377 regmap_write(map: max98373->regmap,
378 MAX98373_R202A_PCM_TO_SPK_MONO_MIX_2,
379 val: x);
380 slot_found++;
381 if (slot_found > 1)
382 break;
383 }
384 }
385
386 /* Tx slot Hi-Z configuration */
387 regmap_write(map: max98373->regmap,
388 MAX98373_R2020_PCM_TX_HIZ_EN_1,
389 val: ~tx_mask & 0xFF);
390 regmap_write(map: max98373->regmap,
391 MAX98373_R2021_PCM_TX_HIZ_EN_2,
392 val: (~tx_mask & 0xFF00) >> 8);
393
394 return 0;
395}
396
397#define MAX98373_RATES SNDRV_PCM_RATE_8000_96000
398
399#define MAX98373_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
400 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
401
402static const struct snd_soc_dai_ops max98373_dai_ops = {
403 .set_fmt = max98373_dai_set_fmt,
404 .hw_params = max98373_dai_hw_params,
405 .set_tdm_slot = max98373_dai_tdm_slot,
406};
407
408static bool max98373_readable_register(struct device *dev, unsigned int reg)
409{
410 switch (reg) {
411 case MAX98373_R2000_SW_RESET:
412 case MAX98373_R2001_INT_RAW1 ... MAX98373_R200C_INT_EN3:
413 case MAX98373_R2010_IRQ_CTRL:
414 case MAX98373_R2014_THERM_WARN_THRESH
415 ... MAX98373_R2018_THERM_FOLDBACK_EN:
416 case MAX98373_R201E_PIN_DRIVE_STRENGTH
417 ... MAX98373_R2036_SOUNDWIRE_CTRL:
418 case MAX98373_R203D_AMP_DIG_VOL_CTRL ... MAX98373_R2043_AMP_EN:
419 case MAX98373_R2046_IV_SENSE_ADC_DSP_CFG
420 ... MAX98373_R2047_IV_SENSE_ADC_EN:
421 case MAX98373_R2051_MEAS_ADC_SAMPLING_RATE
422 ... MAX98373_R2056_MEAS_ADC_PVDD_CH_EN:
423 case MAX98373_R2090_BDE_LVL_HOLD ... MAX98373_R2092_BDE_CLIPPER_MODE:
424 case MAX98373_R2097_BDE_L1_THRESH
425 ... MAX98373_R209B_BDE_THRESH_HYST:
426 case MAX98373_R20A8_BDE_L1_CFG_1 ... MAX98373_R20B3_BDE_L4_CFG_3:
427 case MAX98373_R20B5_BDE_EN ... MAX98373_R20B6_BDE_CUR_STATE_READBACK:
428 case MAX98373_R20D1_DHT_CFG ... MAX98373_R20D4_DHT_EN:
429 case MAX98373_R20E0_LIMITER_THRESH_CFG ... MAX98373_R20E2_LIMITER_EN:
430 case MAX98373_R20FE_DEVICE_AUTO_RESTART_CFG
431 ... MAX98373_R20FF_GLOBAL_SHDN:
432 case MAX98373_R21FF_REV_ID:
433 return true;
434 default:
435 return false;
436 }
437};
438
439static bool max98373_volatile_reg(struct device *dev, unsigned int reg)
440{
441 switch (reg) {
442 case MAX98373_R2000_SW_RESET ... MAX98373_R2009_INT_FLAG3:
443 case MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK:
444 case MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK:
445 case MAX98373_R20B6_BDE_CUR_STATE_READBACK:
446 case MAX98373_R20FF_GLOBAL_SHDN:
447 case MAX98373_R21FF_REV_ID:
448 return true;
449 default:
450 return false;
451 }
452}
453
454static struct snd_soc_dai_driver max98373_dai[] = {
455 {
456 .name = "max98373-aif1",
457 .playback = {
458 .stream_name = "HiFi Playback",
459 .channels_min = 1,
460 .channels_max = 2,
461 .rates = MAX98373_RATES,
462 .formats = MAX98373_FORMATS,
463 },
464 .capture = {
465 .stream_name = "HiFi Capture",
466 .channels_min = 1,
467 .channels_max = 2,
468 .rates = MAX98373_RATES,
469 .formats = MAX98373_FORMATS,
470 },
471 .ops = &max98373_dai_ops,
472 }
473};
474
475static int max98373_suspend(struct device *dev)
476{
477 struct max98373_priv *max98373 = dev_get_drvdata(dev);
478 int i;
479
480 /* cache feedback register values before suspend */
481 for (i = 0; i < max98373->cache_num; i++)
482 regmap_read(map: max98373->regmap, reg: max98373->cache[i].reg, val: &max98373->cache[i].val);
483
484 regcache_cache_only(map: max98373->regmap, enable: true);
485 regcache_mark_dirty(map: max98373->regmap);
486 return 0;
487}
488
489static int max98373_resume(struct device *dev)
490{
491 struct max98373_priv *max98373 = dev_get_drvdata(dev);
492
493 regcache_cache_only(map: max98373->regmap, enable: false);
494 max98373_reset(max98373, dev);
495 regcache_sync(map: max98373->regmap);
496 return 0;
497}
498
499static const struct dev_pm_ops max98373_pm = {
500 SYSTEM_SLEEP_PM_OPS(max98373_suspend, max98373_resume)
501};
502
503static const struct regmap_config max98373_regmap = {
504 .reg_bits = 16,
505 .val_bits = 8,
506 .max_register = MAX98373_R21FF_REV_ID,
507 .reg_defaults = max98373_reg,
508 .num_reg_defaults = ARRAY_SIZE(max98373_reg),
509 .readable_reg = max98373_readable_register,
510 .volatile_reg = max98373_volatile_reg,
511 .cache_type = REGCACHE_RBTREE,
512};
513
514static int max98373_i2c_probe(struct i2c_client *i2c)
515{
516 int ret = 0;
517 int reg = 0;
518 int i;
519 struct max98373_priv *max98373 = NULL;
520
521 max98373 = devm_kzalloc(dev: &i2c->dev, size: sizeof(*max98373), GFP_KERNEL);
522
523 if (!max98373) {
524 ret = -ENOMEM;
525 return ret;
526 }
527 i2c_set_clientdata(client: i2c, data: max98373);
528
529 /* update interleave mode info */
530 if (device_property_read_bool(dev: &i2c->dev, propname: "maxim,interleave_mode"))
531 max98373->interleave_mode = true;
532 else
533 max98373->interleave_mode = false;
534
535 /* regmap initialization */
536 max98373->regmap = devm_regmap_init_i2c(i2c, &max98373_regmap);
537 if (IS_ERR(ptr: max98373->regmap)) {
538 ret = PTR_ERR(ptr: max98373->regmap);
539 dev_err(&i2c->dev,
540 "Failed to allocate regmap: %d\n", ret);
541 return ret;
542 }
543
544 max98373->cache_num = ARRAY_SIZE(max98373_i2c_cache_reg);
545 max98373->cache = devm_kcalloc(dev: &i2c->dev, n: max98373->cache_num,
546 size: sizeof(*max98373->cache),
547 GFP_KERNEL);
548 if (!max98373->cache) {
549 ret = -ENOMEM;
550 return ret;
551 }
552
553 for (i = 0; i < max98373->cache_num; i++)
554 max98373->cache[i].reg = max98373_i2c_cache_reg[i];
555
556 /* voltage/current slot & gpio configuration */
557 max98373_slot_config(dev: &i2c->dev, max98373);
558
559 /* Check Revision ID */
560 ret = regmap_read(map: max98373->regmap,
561 MAX98373_R21FF_REV_ID, val: &reg);
562 if (ret < 0) {
563 dev_err(&i2c->dev,
564 "Failed to read: 0x%02X\n", MAX98373_R21FF_REV_ID);
565 return ret;
566 }
567 dev_info(&i2c->dev, "MAX98373 revisionID: 0x%02X\n", reg);
568
569 /* codec registration */
570 ret = devm_snd_soc_register_component(dev: &i2c->dev, component_driver: &soc_codec_dev_max98373,
571 dai_drv: max98373_dai, ARRAY_SIZE(max98373_dai));
572 if (ret < 0)
573 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
574
575 return ret;
576}
577
578static const struct i2c_device_id max98373_i2c_id[] = {
579 { "max98373"},
580 { },
581};
582
583MODULE_DEVICE_TABLE(i2c, max98373_i2c_id);
584
585#if defined(CONFIG_OF)
586static const struct of_device_id max98373_of_match[] = {
587 { .compatible = "maxim,max98373", },
588 { }
589};
590MODULE_DEVICE_TABLE(of, max98373_of_match);
591#endif
592
593#ifdef CONFIG_ACPI
594static const struct acpi_device_id max98373_acpi_match[] = {
595 { "MX98373", 0 },
596 {},
597};
598MODULE_DEVICE_TABLE(acpi, max98373_acpi_match);
599#endif
600
601static struct i2c_driver max98373_i2c_driver = {
602 .driver = {
603 .name = "max98373",
604 .of_match_table = of_match_ptr(max98373_of_match),
605 .acpi_match_table = ACPI_PTR(max98373_acpi_match),
606 .pm = pm_ptr(&max98373_pm),
607 },
608 .probe = max98373_i2c_probe,
609 .id_table = max98373_i2c_id,
610};
611
612module_i2c_driver(max98373_i2c_driver)
613
614MODULE_DESCRIPTION("ALSA SoC MAX98373 driver");
615MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>");
616MODULE_LICENSE("GPL");
617

source code of linux/sound/soc/codecs/max98373-i2c.c