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 static const 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
get_ni_value(int mclk,int rate)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
max9867_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)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_component *component = dai->component;
183 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
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(component->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(component->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
max9867_mute(struct snd_soc_dai * dai,int mute)251 static int max9867_mute(struct snd_soc_dai *dai, int mute)
252 {
253 struct snd_soc_component *component = dai->component;
254 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
255
256 if (mute)
257 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
258 MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
259 else
260 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
261 MAX9867_DAC_MUTE_MASK, 0);
262 return 0;
263 }
264
max9867_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)265 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
266 int clk_id, unsigned int freq, int dir)
267 {
268 struct snd_soc_component *component = codec_dai->component;
269 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
270 int value = 0;
271
272 /* Set the prescaler based on the master clock frequency*/
273 if (freq >= 10000000 && freq <= 20000000) {
274 value |= MAX9867_PSCLK_10_20;
275 max9867->pclk = freq;
276 } else if (freq >= 20000000 && freq <= 40000000) {
277 value |= MAX9867_PSCLK_20_40;
278 max9867->pclk = freq/2;
279 } else if (freq >= 40000000 && freq <= 60000000) {
280 value |= MAX9867_PSCLK_40_60;
281 max9867->pclk = freq/4;
282 } else {
283 dev_err(component->dev,
284 "Invalid clock frequency %uHz (required 10-60MHz)\n",
285 freq);
286 return -EINVAL;
287 }
288 value = value << MAX9867_PSCLK_SHIFT;
289 max9867->sysclk = freq;
290 /* exact integer mode is not supported */
291 value &= ~MAX9867_FREQ_MASK;
292 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
293 MAX9867_PSCLK_MASK, value);
294 return 0;
295 }
296
max9867_dai_set_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)297 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
298 unsigned int fmt)
299 {
300 struct snd_soc_component *component = codec_dai->component;
301 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
302 u8 iface1A = 0, iface1B = 0;
303
304 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
305 case SND_SOC_DAIFMT_CBM_CFM:
306 max9867->master = 1;
307 iface1A |= MAX9867_MASTER;
308 break;
309 case SND_SOC_DAIFMT_CBS_CFS:
310 max9867->master = 0;
311 iface1A &= ~MAX9867_MASTER;
312 break;
313 default:
314 return -EINVAL;
315 }
316
317 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
318 case SND_SOC_DAIFMT_I2S:
319 iface1A |= MAX9867_I2S_DLY;
320 break;
321 case SND_SOC_DAIFMT_DSP_A:
322 iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
323 break;
324 default:
325 return -EINVAL;
326 }
327
328 /* Clock inversion bits, BCI and WCI */
329 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
330 case SND_SOC_DAIFMT_NB_NF:
331 break;
332 case SND_SOC_DAIFMT_IB_IF:
333 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
334 break;
335 case SND_SOC_DAIFMT_IB_NF:
336 iface1A |= MAX9867_BCI_MODE;
337 break;
338 case SND_SOC_DAIFMT_NB_IF:
339 iface1A |= MAX9867_WCI_MODE;
340 break;
341 default:
342 return -EINVAL;
343 }
344
345 regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
346 regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
347 return 0;
348 }
349
350 static const struct snd_soc_dai_ops max9867_dai_ops = {
351 .set_fmt = max9867_dai_set_fmt,
352 .set_sysclk = max9867_set_dai_sysclk,
353 .digital_mute = max9867_mute,
354 .hw_params = max9867_dai_hw_params,
355 };
356
357 #define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
358 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
359 #define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
360
361 static struct snd_soc_dai_driver max9867_dai[] = {
362 {
363 .name = "max9867-aif1",
364 .playback = {
365 .stream_name = "HiFi Playback",
366 .channels_min = 2,
367 .channels_max = 2,
368 .rates = MAX9867_RATES,
369 .formats = MAX9867_FORMATS,
370 },
371 .capture = {
372 .stream_name = "HiFi Capture",
373 .channels_min = 2,
374 .channels_max = 2,
375 .rates = MAX9867_RATES,
376 .formats = MAX9867_FORMATS,
377 },
378 .ops = &max9867_dai_ops,
379 .symmetric_rates = 1,
380 }
381 };
382
383 #ifdef CONFIG_PM
max9867_suspend(struct snd_soc_component * component)384 static int max9867_suspend(struct snd_soc_component *component)
385 {
386 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
387
388 return 0;
389 }
390
max9867_resume(struct snd_soc_component * component)391 static int max9867_resume(struct snd_soc_component *component)
392 {
393 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
394
395 return 0;
396 }
397 #else
398 #define max9867_suspend NULL
399 #define max9867_resume NULL
400 #endif
401
max9867_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)402 static int max9867_set_bias_level(struct snd_soc_component *component,
403 enum snd_soc_bias_level level)
404 {
405 int err;
406 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
407
408 switch (level) {
409 case SND_SOC_BIAS_STANDBY:
410 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
411 err = regcache_sync(max9867->regmap);
412 if (err)
413 return err;
414
415 err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
416 MAX9867_SHTDOWN, MAX9867_SHTDOWN);
417 if (err)
418 return err;
419 }
420 break;
421 case SND_SOC_BIAS_OFF:
422 err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
423 MAX9867_SHTDOWN, 0);
424 if (err)
425 return err;
426
427 regcache_mark_dirty(max9867->regmap);
428 break;
429 default:
430 break;
431 }
432
433 return 0;
434 }
435
436 static const struct snd_soc_component_driver max9867_component = {
437 .controls = max9867_snd_controls,
438 .num_controls = ARRAY_SIZE(max9867_snd_controls),
439 .dapm_routes = max9867_audio_map,
440 .num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
441 .dapm_widgets = max9867_dapm_widgets,
442 .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
443 .suspend = max9867_suspend,
444 .resume = max9867_resume,
445 .set_bias_level = max9867_set_bias_level,
446 .idle_bias_on = 1,
447 .use_pmdown_time = 1,
448 .endianness = 1,
449 .non_legacy_dai_naming = 1,
450 };
451
max9867_volatile_register(struct device * dev,unsigned int reg)452 static bool max9867_volatile_register(struct device *dev, unsigned int reg)
453 {
454 switch (reg) {
455 case MAX9867_STATUS:
456 case MAX9867_JACKSTATUS:
457 case MAX9867_AUXHIGH:
458 case MAX9867_AUXLOW:
459 return true;
460 default:
461 return false;
462 }
463 }
464
465 static const struct reg_default max9867_reg[] = {
466 { 0x04, 0x00 },
467 { 0x05, 0x00 },
468 { 0x06, 0x00 },
469 { 0x07, 0x00 },
470 { 0x08, 0x00 },
471 { 0x09, 0x00 },
472 { 0x0A, 0x00 },
473 { 0x0B, 0x00 },
474 { 0x0C, 0x00 },
475 { 0x0D, 0x00 },
476 { 0x0E, 0x00 },
477 { 0x0F, 0x00 },
478 { 0x10, 0x00 },
479 { 0x11, 0x00 },
480 { 0x12, 0x00 },
481 { 0x13, 0x00 },
482 { 0x14, 0x00 },
483 { 0x15, 0x00 },
484 { 0x16, 0x00 },
485 { 0x17, 0x00 },
486 };
487
488 static const struct regmap_config max9867_regmap = {
489 .reg_bits = 8,
490 .val_bits = 8,
491 .max_register = MAX9867_REVISION,
492 .reg_defaults = max9867_reg,
493 .num_reg_defaults = ARRAY_SIZE(max9867_reg),
494 .volatile_reg = max9867_volatile_register,
495 .cache_type = REGCACHE_RBTREE,
496 };
497
max9867_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)498 static int max9867_i2c_probe(struct i2c_client *i2c,
499 const struct i2c_device_id *id)
500 {
501 struct max9867_priv *max9867;
502 int ret = 0, reg;
503
504 max9867 = devm_kzalloc(&i2c->dev,
505 sizeof(*max9867), GFP_KERNEL);
506 if (!max9867)
507 return -ENOMEM;
508
509 i2c_set_clientdata(i2c, max9867);
510 max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
511 if (IS_ERR(max9867->regmap)) {
512 ret = PTR_ERR(max9867->regmap);
513 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
514 return ret;
515 }
516 ret = regmap_read(max9867->regmap,
517 MAX9867_REVISION, ®);
518 if (ret < 0) {
519 dev_err(&i2c->dev, "Failed to read: %d\n", ret);
520 return ret;
521 }
522 dev_info(&i2c->dev, "device revision: %x\n", reg);
523 ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
524 max9867_dai, ARRAY_SIZE(max9867_dai));
525 if (ret < 0) {
526 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
527 return ret;
528 }
529 return ret;
530 }
531
532 static const struct i2c_device_id max9867_i2c_id[] = {
533 { "max9867", 0 },
534 { }
535 };
536 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
537
538 static const struct of_device_id max9867_of_match[] = {
539 { .compatible = "maxim,max9867", },
540 { }
541 };
542 MODULE_DEVICE_TABLE(of, max9867_of_match);
543
544 static struct i2c_driver max9867_i2c_driver = {
545 .driver = {
546 .name = "max9867",
547 .of_match_table = of_match_ptr(max9867_of_match),
548 },
549 .probe = max9867_i2c_probe,
550 .id_table = max9867_i2c_id,
551 };
552
553 module_i2c_driver(max9867_i2c_driver);
554
555 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
556 MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
557 MODULE_LICENSE("GPL");
558