This source file includes following definitions.
- max98925_dac_event
- max98925_volatile_register
- max98925_readable_register
- max98925_rate_value
- max98925_set_sense_data
- max98925_dai_set_fmt
- max98925_set_clock
- max98925_dai_hw_params
- max98925_dai_set_sysclk
- max98925_probe
- max98925_i2c_probe
1
2
3
4
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 "max98925.h"
17
18 static const char *const dai_text[] = {
19 "Left", "Right", "LeftRight", "LeftRightDiv2",
20 };
21
22 static const char * const max98925_boost_voltage_text[] = {
23 "8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
24 "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
25 };
26
27 static SOC_ENUM_SINGLE_DECL(max98925_boost_voltage,
28 MAX98925_CONFIGURATION, M98925_BST_VOUT_SHIFT,
29 max98925_boost_voltage_text);
30
31 static const char *const hpf_text[] = {
32 "Disable", "DC Block", "100Hz", "200Hz", "400Hz", "800Hz",
33 };
34
35 static const struct reg_default max98925_reg[] = {
36 { 0x0B, 0x00 },
37 { 0x0C, 0x00 },
38 { 0x0D, 0x00 },
39 { 0x0E, 0x00 },
40 { 0x0F, 0x00 },
41 { 0x10, 0x00 },
42 { 0x11, 0xC0 },
43 { 0x12, 0x00 },
44 { 0x13, 0x00 },
45 { 0x14, 0xF0 },
46 { 0x15, 0x00 },
47 { 0x16, 0xAB },
48 { 0x17, 0x89 },
49 { 0x18, 0x00 },
50 { 0x19, 0x00 },
51 { 0x1A, 0x06 },
52 { 0x1B, 0xC0 },
53 { 0x1C, 0x00 },
54 { 0x1D, 0x00 },
55 { 0x1E, 0xF0 },
56 { 0x1F, 0x00 },
57 { 0x20, 0x50 },
58 { 0x21, 0x00 },
59 { 0x22, 0x00 },
60 { 0x23, 0x00 },
61 { 0x24, 0x00 },
62 { 0x25, 0x00 },
63 { 0x26, 0x00 },
64 { 0x27, 0xFF },
65 { 0x28, 0xFF },
66 { 0x29, 0xFF },
67 { 0x2A, 0xFF },
68 { 0x2B, 0x02 },
69 { 0x2C, 0x90 },
70 { 0x2D, 0x00 },
71 { 0x2E, 0x02 },
72 { 0x2F, 0x00 },
73 { 0x30, 0x0A },
74 { 0x31, 0x00 },
75 { 0x32, 0x80 },
76 { 0x33, 0x00 },
77 { 0x34, 0x92 },
78 { 0x35, 0x01 },
79 { 0x36, 0x00 },
80 { 0x37, 0x00 },
81 { 0x38, 0x00 },
82 { 0x3A, 0x00 },
83 };
84
85 static const struct soc_enum max98925_dai_enum =
86 SOC_ENUM_SINGLE(MAX98925_GAIN, 5, ARRAY_SIZE(dai_text), dai_text);
87
88 static const struct soc_enum max98925_hpf_enum =
89 SOC_ENUM_SINGLE(MAX98925_FILTERS, 0, ARRAY_SIZE(hpf_text), hpf_text);
90
91 static const struct snd_kcontrol_new max98925_hpf_sel_mux =
92 SOC_DAPM_ENUM("Rc Filter MUX Mux", max98925_hpf_enum);
93
94 static const struct snd_kcontrol_new max98925_dai_sel_mux =
95 SOC_DAPM_ENUM("DAI IN MUX Mux", max98925_dai_enum);
96
97 static int max98925_dac_event(struct snd_soc_dapm_widget *w,
98 struct snd_kcontrol *kcontrol, int event)
99 {
100 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
101 struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
102
103 switch (event) {
104 case SND_SOC_DAPM_PRE_PMU:
105 regmap_update_bits(max98925->regmap,
106 MAX98925_BLOCK_ENABLE,
107 M98925_BST_EN_MASK |
108 M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK,
109 M98925_BST_EN_MASK |
110 M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK);
111 break;
112 case SND_SOC_DAPM_POST_PMD:
113 regmap_update_bits(max98925->regmap,
114 MAX98925_BLOCK_ENABLE, M98925_BST_EN_MASK |
115 M98925_ADC_IMON_EN_MASK | M98925_ADC_VMON_EN_MASK, 0);
116 break;
117 default:
118 return 0;
119 }
120 return 0;
121 }
122
123 static const struct snd_soc_dapm_widget max98925_dapm_widgets[] = {
124 SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
125 SND_SOC_DAPM_MUX("DAI IN MUX", SND_SOC_NOPM, 0, 0,
126 &max98925_dai_sel_mux),
127 SND_SOC_DAPM_MUX("Rc Filter MUX", SND_SOC_NOPM, 0, 0,
128 &max98925_hpf_sel_mux),
129 SND_SOC_DAPM_DAC_E("Amp Enable", NULL, MAX98925_BLOCK_ENABLE,
130 M98925_SPK_EN_SHIFT, 0, max98925_dac_event,
131 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
132 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98925_GLOBAL_ENABLE,
133 M98925_EN_SHIFT, 0, NULL, 0),
134 SND_SOC_DAPM_OUTPUT("BE_OUT"),
135 };
136
137 static const struct snd_soc_dapm_route max98925_audio_map[] = {
138 {"DAI IN MUX", "Left", "DAI_OUT"},
139 {"DAI IN MUX", "Right", "DAI_OUT"},
140 {"DAI IN MUX", "LeftRight", "DAI_OUT"},
141 {"DAI IN MUX", "LeftRightDiv2", "DAI_OUT"},
142 {"Rc Filter MUX", "Disable", "DAI IN MUX"},
143 {"Rc Filter MUX", "DC Block", "DAI IN MUX"},
144 {"Rc Filter MUX", "100Hz", "DAI IN MUX"},
145 {"Rc Filter MUX", "200Hz", "DAI IN MUX"},
146 {"Rc Filter MUX", "400Hz", "DAI IN MUX"},
147 {"Rc Filter MUX", "800Hz", "DAI IN MUX"},
148 {"Amp Enable", NULL, "Rc Filter MUX"},
149 {"BE_OUT", NULL, "Amp Enable"},
150 {"BE_OUT", NULL, "Global Enable"},
151 };
152
153 static bool max98925_volatile_register(struct device *dev, unsigned int reg)
154 {
155 switch (reg) {
156 case MAX98925_VBAT_DATA:
157 case MAX98925_VBST_DATA:
158 case MAX98925_LIVE_STATUS0:
159 case MAX98925_LIVE_STATUS1:
160 case MAX98925_LIVE_STATUS2:
161 case MAX98925_STATE0:
162 case MAX98925_STATE1:
163 case MAX98925_STATE2:
164 case MAX98925_FLAG0:
165 case MAX98925_FLAG1:
166 case MAX98925_FLAG2:
167 case MAX98925_REV_VERSION:
168 return true;
169 default:
170 return false;
171 }
172 }
173
174 static bool max98925_readable_register(struct device *dev, unsigned int reg)
175 {
176 switch (reg) {
177 case MAX98925_IRQ_CLEAR0:
178 case MAX98925_IRQ_CLEAR1:
179 case MAX98925_IRQ_CLEAR2:
180 case MAX98925_ALC_HOLD_RLS:
181 return false;
182 default:
183 return true;
184 }
185 }
186
187 static DECLARE_TLV_DB_SCALE(max98925_spk_tlv, -600, 100, 0);
188
189 static const struct snd_kcontrol_new max98925_snd_controls[] = {
190 SOC_SINGLE_TLV("Speaker Volume", MAX98925_GAIN,
191 M98925_SPK_GAIN_SHIFT, (1<<M98925_SPK_GAIN_WIDTH)-1, 0,
192 max98925_spk_tlv),
193 SOC_SINGLE("Ramp Switch", MAX98925_GAIN_RAMPING,
194 M98925_SPK_RMP_EN_SHIFT, 1, 0),
195 SOC_SINGLE("ZCD Switch", MAX98925_GAIN_RAMPING,
196 M98925_SPK_ZCD_EN_SHIFT, 1, 0),
197 SOC_SINGLE("ALC Switch", MAX98925_THRESHOLD,
198 M98925_ALC_EN_SHIFT, 1, 0),
199 SOC_SINGLE("ALC Threshold", MAX98925_THRESHOLD, M98925_ALC_TH_SHIFT,
200 (1<<M98925_ALC_TH_WIDTH)-1, 0),
201 SOC_ENUM("Boost Output Voltage", max98925_boost_voltage),
202 };
203
204
205 static const struct {
206 int rate;
207 int sr;
208 int divisors[3][2];
209 } rate_table[] = {
210 {
211 .rate = 8000,
212 .sr = 0,
213 .divisors = { {1, 375}, {5, 1764}, {1, 384} }
214 },
215 {
216 .rate = 11025,
217 .sr = 1,
218 .divisors = { {147, 40000}, {1, 256}, {147, 40960} }
219 },
220 {
221 .rate = 12000,
222 .sr = 2,
223 .divisors = { {1, 250}, {5, 1176}, {1, 256} }
224 },
225 {
226 .rate = 16000,
227 .sr = 3,
228 .divisors = { {2, 375}, {5, 882}, {1, 192} }
229 },
230 {
231 .rate = 22050,
232 .sr = 4,
233 .divisors = { {147, 20000}, {1, 128}, {147, 20480} }
234 },
235 {
236 .rate = 24000,
237 .sr = 5,
238 .divisors = { {1, 125}, {5, 588}, {1, 128} }
239 },
240 {
241 .rate = 32000,
242 .sr = 6,
243 .divisors = { {4, 375}, {5, 441}, {1, 96} }
244 },
245 {
246 .rate = 44100,
247 .sr = 7,
248 .divisors = { {147, 10000}, {1, 64}, {147, 10240} }
249 },
250 {
251 .rate = 48000,
252 .sr = 8,
253 .divisors = { {2, 125}, {5, 294}, {1, 64} }
254 },
255 };
256
257 static inline int max98925_rate_value(struct snd_soc_component *component,
258 int rate, int clock, int *value, int *n, int *m)
259 {
260 int ret = -EINVAL;
261 int i;
262
263 for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
264 if (rate_table[i].rate >= rate) {
265 *value = rate_table[i].sr;
266 *n = rate_table[i].divisors[clock][0];
267 *m = rate_table[i].divisors[clock][1];
268 ret = 0;
269 break;
270 }
271 }
272 return ret;
273 }
274
275 static void max98925_set_sense_data(struct max98925_priv *max98925)
276 {
277
278 regmap_update_bits(max98925->regmap,
279 MAX98925_DOUT_CFG_VMON,
280 M98925_DAI_VMON_EN_MASK, M98925_DAI_VMON_EN_MASK);
281 regmap_update_bits(max98925->regmap,
282 MAX98925_DOUT_CFG_VMON,
283 M98925_DAI_VMON_SLOT_MASK,
284 max98925->v_slot << M98925_DAI_VMON_SLOT_SHIFT);
285
286 regmap_update_bits(max98925->regmap,
287 MAX98925_DOUT_CFG_IMON,
288 M98925_DAI_IMON_EN_MASK, M98925_DAI_IMON_EN_MASK);
289 regmap_update_bits(max98925->regmap,
290 MAX98925_DOUT_CFG_IMON,
291 M98925_DAI_IMON_SLOT_MASK,
292 max98925->i_slot << M98925_DAI_IMON_SLOT_SHIFT);
293 }
294
295 static int max98925_dai_set_fmt(struct snd_soc_dai *codec_dai,
296 unsigned int fmt)
297 {
298 struct snd_soc_component *component = codec_dai->component;
299 struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
300 unsigned int invert = 0;
301
302 dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
303 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
304 case SND_SOC_DAIFMT_CBS_CFS:
305
306 regmap_update_bits(max98925->regmap,
307 MAX98925_DAI_CLK_MODE2,
308 M98925_DAI_MAS_MASK, 0);
309 max98925_set_sense_data(max98925);
310 break;
311 case SND_SOC_DAIFMT_CBM_CFM:
312
313
314
315
316 regmap_update_bits(max98925->regmap,
317 MAX98925_DAI_CLK_MODE2,
318 M98925_DAI_MAS_MASK, M98925_DAI_MAS_MASK);
319 break;
320 case SND_SOC_DAIFMT_CBS_CFM:
321 case SND_SOC_DAIFMT_CBM_CFS:
322 default:
323 dev_err(component->dev, "DAI clock mode unsupported");
324 return -EINVAL;
325 }
326
327 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
328 case SND_SOC_DAIFMT_NB_NF:
329 break;
330 case SND_SOC_DAIFMT_NB_IF:
331 invert = M98925_DAI_WCI_MASK;
332 break;
333 case SND_SOC_DAIFMT_IB_NF:
334 invert = M98925_DAI_BCI_MASK;
335 break;
336 case SND_SOC_DAIFMT_IB_IF:
337 invert = M98925_DAI_BCI_MASK | M98925_DAI_WCI_MASK;
338 break;
339 default:
340 dev_err(component->dev, "DAI invert mode unsupported");
341 return -EINVAL;
342 }
343
344 regmap_update_bits(max98925->regmap, MAX98925_FORMAT,
345 M98925_DAI_BCI_MASK | M98925_DAI_WCI_MASK, invert);
346 return 0;
347 }
348
349 static int max98925_set_clock(struct max98925_priv *max98925,
350 struct snd_pcm_hw_params *params)
351 {
352 unsigned int dai_sr = 0, clock, mdll, n, m;
353 struct snd_soc_component *component = max98925->component;
354 int rate = params_rate(params);
355
356 int blr_clk_ratio = params_channels(params) * max98925->ch_size;
357
358 switch (blr_clk_ratio) {
359 case 32:
360 regmap_update_bits(max98925->regmap,
361 MAX98925_DAI_CLK_MODE2,
362 M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_32);
363 break;
364 case 48:
365 regmap_update_bits(max98925->regmap,
366 MAX98925_DAI_CLK_MODE2,
367 M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_48);
368 break;
369 case 64:
370 regmap_update_bits(max98925->regmap,
371 MAX98925_DAI_CLK_MODE2,
372 M98925_DAI_BSEL_MASK, M98925_DAI_BSEL_64);
373 break;
374 default:
375 return -EINVAL;
376 }
377
378 switch (max98925->sysclk) {
379 case 6000000:
380 clock = 0;
381 mdll = M98925_MDLL_MULT_MCLKx16;
382 break;
383 case 11289600:
384 clock = 1;
385 mdll = M98925_MDLL_MULT_MCLKx8;
386 break;
387 case 12000000:
388 clock = 0;
389 mdll = M98925_MDLL_MULT_MCLKx8;
390 break;
391 case 12288000:
392 clock = 2;
393 mdll = M98925_MDLL_MULT_MCLKx8;
394 break;
395 default:
396 dev_info(max98925->component->dev, "unsupported sysclk %d\n",
397 max98925->sysclk);
398 return -EINVAL;
399 }
400
401 if (max98925_rate_value(component, rate, clock, &dai_sr, &n, &m))
402 return -EINVAL;
403
404
405 regmap_update_bits(max98925->regmap,
406 MAX98925_DAI_CLK_MODE2,
407 M98925_DAI_SR_MASK, dai_sr << M98925_DAI_SR_SHIFT);
408
409 regmap_write(max98925->regmap,
410 MAX98925_DAI_CLK_DIV_M_MSBS, m >> 8);
411 regmap_write(max98925->regmap,
412 MAX98925_DAI_CLK_DIV_M_LSBS, m & 0xFF);
413
414 regmap_write(max98925->regmap,
415 MAX98925_DAI_CLK_DIV_N_MSBS, n >> 8);
416 regmap_write(max98925->regmap,
417 MAX98925_DAI_CLK_DIV_N_LSBS, n & 0xFF);
418
419 regmap_update_bits(max98925->regmap, MAX98925_DAI_CLK_MODE1,
420 M98925_MDLL_MULT_MASK, mdll << M98925_MDLL_MULT_SHIFT);
421 return 0;
422 }
423
424 static int max98925_dai_hw_params(struct snd_pcm_substream *substream,
425 struct snd_pcm_hw_params *params,
426 struct snd_soc_dai *dai)
427 {
428 struct snd_soc_component *component = dai->component;
429 struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
430
431 switch (params_width(params)) {
432 case 16:
433 regmap_update_bits(max98925->regmap,
434 MAX98925_FORMAT,
435 M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_16);
436 max98925->ch_size = 16;
437 break;
438 case 24:
439 regmap_update_bits(max98925->regmap,
440 MAX98925_FORMAT,
441 M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_24);
442 max98925->ch_size = 24;
443 break;
444 case 32:
445 regmap_update_bits(max98925->regmap,
446 MAX98925_FORMAT,
447 M98925_DAI_CHANSZ_MASK, M98925_DAI_CHANSZ_32);
448 max98925->ch_size = 32;
449 break;
450 default:
451 pr_err("%s: format unsupported %d",
452 __func__, params_format(params));
453 return -EINVAL;
454 }
455 dev_dbg(component->dev, "%s: format supported %d",
456 __func__, params_format(params));
457 return max98925_set_clock(max98925, params);
458 }
459
460 static int max98925_dai_set_sysclk(struct snd_soc_dai *dai,
461 int clk_id, unsigned int freq, int dir)
462 {
463 struct snd_soc_component *component = dai->component;
464 struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
465
466 switch (clk_id) {
467 case 0:
468
469 regmap_update_bits(max98925->regmap,
470 MAX98925_DAI_CLK_MODE1,
471 M98925_DAI_CLK_SOURCE_MASK, 0);
472 break;
473 case 1:
474
475 regmap_update_bits(max98925->regmap,
476 MAX98925_DAI_CLK_MODE1,
477 M98925_DAI_CLK_SOURCE_MASK,
478 M98925_DAI_CLK_SOURCE_MASK);
479 break;
480 default:
481 return -EINVAL;
482 }
483 max98925->sysclk = freq;
484 return 0;
485 }
486
487 #define MAX98925_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
488 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
489
490 static const struct snd_soc_dai_ops max98925_dai_ops = {
491 .set_sysclk = max98925_dai_set_sysclk,
492 .set_fmt = max98925_dai_set_fmt,
493 .hw_params = max98925_dai_hw_params,
494 };
495
496 static struct snd_soc_dai_driver max98925_dai[] = {
497 {
498 .name = "max98925-aif1",
499 .playback = {
500 .stream_name = "HiFi Playback",
501 .channels_min = 1,
502 .channels_max = 2,
503 .rates = SNDRV_PCM_RATE_8000_48000,
504 .formats = MAX98925_FORMATS,
505 },
506 .capture = {
507 .stream_name = "HiFi Capture",
508 .channels_min = 1,
509 .channels_max = 2,
510 .rates = SNDRV_PCM_RATE_8000_48000,
511 .formats = MAX98925_FORMATS,
512 },
513 .ops = &max98925_dai_ops,
514 }
515 };
516
517 static int max98925_probe(struct snd_soc_component *component)
518 {
519 struct max98925_priv *max98925 = snd_soc_component_get_drvdata(component);
520
521 max98925->component = component;
522 regmap_write(max98925->regmap, MAX98925_GLOBAL_ENABLE, 0x00);
523
524 regmap_write(max98925->regmap,
525 MAX98925_FORMAT, M98925_DAI_DLY_MASK);
526 regmap_write(max98925->regmap, MAX98925_TDM_SLOT_SELECT, 0xC8);
527 regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG1, 0xFF);
528 regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG2, 0xFF);
529 regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG3, 0xFF);
530 regmap_write(max98925->regmap, MAX98925_DOUT_HIZ_CFG4, 0xF0);
531 regmap_write(max98925->regmap, MAX98925_FILTERS, 0xD8);
532 regmap_write(max98925->regmap, MAX98925_ALC_CONFIGURATION, 0xF8);
533 regmap_write(max98925->regmap, MAX98925_CONFIGURATION, 0xF0);
534
535 regmap_write(max98925->regmap, MAX98925_BOOST_LIMITER, 0xF8);
536 return 0;
537 }
538
539 static const struct snd_soc_component_driver soc_component_dev_max98925 = {
540 .probe = max98925_probe,
541 .controls = max98925_snd_controls,
542 .num_controls = ARRAY_SIZE(max98925_snd_controls),
543 .dapm_routes = max98925_audio_map,
544 .num_dapm_routes = ARRAY_SIZE(max98925_audio_map),
545 .dapm_widgets = max98925_dapm_widgets,
546 .num_dapm_widgets = ARRAY_SIZE(max98925_dapm_widgets),
547 .idle_bias_on = 1,
548 .use_pmdown_time = 1,
549 .endianness = 1,
550 .non_legacy_dai_naming = 1,
551 };
552
553 static const struct regmap_config max98925_regmap = {
554 .reg_bits = 8,
555 .val_bits = 8,
556 .max_register = MAX98925_REV_VERSION,
557 .reg_defaults = max98925_reg,
558 .num_reg_defaults = ARRAY_SIZE(max98925_reg),
559 .volatile_reg = max98925_volatile_register,
560 .readable_reg = max98925_readable_register,
561 .cache_type = REGCACHE_RBTREE,
562 };
563
564 static int max98925_i2c_probe(struct i2c_client *i2c,
565 const struct i2c_device_id *id)
566 {
567 int ret, reg;
568 u32 value;
569 struct max98925_priv *max98925;
570
571 max98925 = devm_kzalloc(&i2c->dev,
572 sizeof(*max98925), GFP_KERNEL);
573 if (!max98925)
574 return -ENOMEM;
575
576 i2c_set_clientdata(i2c, max98925);
577 max98925->regmap = devm_regmap_init_i2c(i2c, &max98925_regmap);
578 if (IS_ERR(max98925->regmap)) {
579 ret = PTR_ERR(max98925->regmap);
580 dev_err(&i2c->dev,
581 "Failed to allocate regmap: %d\n", ret);
582 return ret;
583 }
584
585 if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
586 if (value > M98925_DAI_VMON_SLOT_1E_1F) {
587 dev_err(&i2c->dev, "vmon slot number is wrong:\n");
588 return -EINVAL;
589 }
590 max98925->v_slot = value;
591 }
592 if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
593 if (value > M98925_DAI_IMON_SLOT_1E_1F) {
594 dev_err(&i2c->dev, "imon slot number is wrong:\n");
595 return -EINVAL;
596 }
597 max98925->i_slot = value;
598 }
599
600 ret = regmap_read(max98925->regmap, MAX98925_REV_VERSION, ®);
601 if (ret < 0) {
602 dev_err(&i2c->dev, "Read revision failed\n");
603 return ret;
604 }
605
606 if ((reg != MAX98925_VERSION) && (reg != MAX98925_VERSION1)) {
607 ret = -ENODEV;
608 dev_err(&i2c->dev, "Invalid revision (%d 0x%02X)\n",
609 ret, reg);
610 return ret;
611 }
612
613 dev_info(&i2c->dev, "device version 0x%02X\n", reg);
614
615 ret = devm_snd_soc_register_component(&i2c->dev,
616 &soc_component_dev_max98925,
617 max98925_dai, ARRAY_SIZE(max98925_dai));
618 if (ret < 0)
619 dev_err(&i2c->dev,
620 "Failed to register component: %d\n", ret);
621 return ret;
622 }
623
624 static const struct i2c_device_id max98925_i2c_id[] = {
625 { "max98925", 0 },
626 { }
627 };
628 MODULE_DEVICE_TABLE(i2c, max98925_i2c_id);
629
630 static const struct of_device_id max98925_of_match[] = {
631 { .compatible = "maxim,max98925", },
632 { }
633 };
634 MODULE_DEVICE_TABLE(of, max98925_of_match);
635
636 static struct i2c_driver max98925_i2c_driver = {
637 .driver = {
638 .name = "max98925",
639 .of_match_table = of_match_ptr(max98925_of_match),
640 .pm = NULL,
641 },
642 .probe = max98925_i2c_probe,
643 .id_table = max98925_i2c_id,
644 };
645
646 module_i2c_driver(max98925_i2c_driver)
647
648 MODULE_DESCRIPTION("ALSA SoC MAX98925 driver");
649 MODULE_AUTHOR("Ralph Birt <rdbirt@gmail.com>, Anish kumar <anish.kumar@maximintegrated.com>");
650 MODULE_LICENSE("GPL");