xref: /openbmc/linux/sound/soc/codecs/cs35l32.c (revision ae213c44) 
1 /*
2  * cs35l32.c -- CS35L32 ALSA SoC audio driver
3  *
4  * Copyright 2014 CirrusLogic, Inc.
5  *
6  * Author: Brian Austin <brian.austin@cirrus.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  */
13 
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/i2c.h>
20 #include <linux/gpio.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23 #include <linux/platform_device.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/of_device.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/pcm_params.h>
30 #include <sound/soc.h>
31 #include <sound/soc-dapm.h>
32 #include <sound/initval.h>
33 #include <sound/tlv.h>
34 #include <dt-bindings/sound/cs35l32.h>
35 
36 #include "cs35l32.h"
37 
38 #define CS35L32_NUM_SUPPLIES 2
39 static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = {
40 	"VA",
41 	"VP",
42 };
43 
44 struct  cs35l32_private {
45 	struct regmap *regmap;
46 	struct snd_soc_component *component;
47 	struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES];
48 	struct cs35l32_platform_data pdata;
49 	struct gpio_desc *reset_gpio;
50 };
51 
52 static const struct reg_default cs35l32_reg_defaults[] = {
53 
54 	{ 0x06, 0x04 }, /* Power Ctl 1 */
55 	{ 0x07, 0xE8 }, /* Power Ctl 2 */
56 	{ 0x08, 0x40 }, /* Clock Ctl */
57 	{ 0x09, 0x20 }, /* Low Battery Threshold */
58 	{ 0x0A, 0x00 }, /* Voltage Monitor [RO] */
59 	{ 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */
60 	{ 0x0C, 0x07 }, /* IMON Scaling */
61 	{ 0x0D, 0x03 }, /* Audio/LED Pwr Manager */
62 	{ 0x0F, 0x20 }, /* Serial Port Control */
63 	{ 0x10, 0x14 }, /* Class D Amp CTL */
64 	{ 0x11, 0x00 }, /* Protection Release CTL */
65 	{ 0x12, 0xFF }, /* Interrupt Mask 1 */
66 	{ 0x13, 0xFF }, /* Interrupt Mask 2 */
67 	{ 0x14, 0xFF }, /* Interrupt Mask 3 */
68 	{ 0x19, 0x00 }, /* LED Flash Mode Current */
69 	{ 0x1A, 0x00 }, /* LED Movie Mode Current */
70 	{ 0x1B, 0x20 }, /* LED Flash Timer */
71 	{ 0x1C, 0x00 }, /* LED Flash Inhibit Current */
72 };
73 
74 static bool cs35l32_readable_register(struct device *dev, unsigned int reg)
75 {
76 	switch (reg) {
77 	case CS35L32_DEVID_AB ... CS35L32_AUDIO_LED_MNGR:
78 	case CS35L32_ADSP_CTL ... CS35L32_FLASH_INHIBIT:
79 		return true;
80 	default:
81 		return false;
82 	}
83 }
84 
85 static bool cs35l32_volatile_register(struct device *dev, unsigned int reg)
86 {
87 	switch (reg) {
88 	case CS35L32_DEVID_AB ... CS35L32_REV_ID:
89 	case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
90 		return true;
91 	default:
92 		return false;
93 	}
94 }
95 
96 static bool cs35l32_precious_register(struct device *dev, unsigned int reg)
97 {
98 	switch (reg) {
99 	case CS35L32_INT_STATUS_1 ... CS35L32_LED_STATUS:
100 		return true;
101 	default:
102 		return false;
103 	}
104 }
105 
106 static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0);
107 
108 static const struct snd_kcontrol_new imon_ctl =
109 	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1);
110 
111 static const struct snd_kcontrol_new vmon_ctl =
112 	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1);
113 
114 static const struct snd_kcontrol_new vpmon_ctl =
115 	SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1);
116 
117 static const struct snd_kcontrol_new cs35l32_snd_controls[] = {
118 	SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL,
119 		       3, 0x04, 1, classd_ctl_tlv),
120 	SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0),
121 	SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0),
122 };
123 
124 static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = {
125 
126 	SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0),
127 	SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0),
128 
129 	SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1),
130 
131 	SND_SOC_DAPM_INPUT("VP"),
132 	SND_SOC_DAPM_INPUT("ISENSE"),
133 	SND_SOC_DAPM_INPUT("VSENSE"),
134 
135 	SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl),
136 	SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl),
137 	SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl),
138 };
139 
140 static const struct snd_soc_dapm_route cs35l32_audio_map[] = {
141 
142 	{"Speaker", NULL, "BOOST"},
143 
144 	{"VMON ADC", NULL, "VSENSE"},
145 	{"IMON ADC", NULL, "ISENSE"},
146 	{"VPMON ADC", NULL, "VP"},
147 
148 	{"SDOUT", "Switch", "VMON ADC"},
149 	{"SDOUT",  "Switch", "IMON ADC"},
150 	{"SDOUT", "Switch", "VPMON ADC"},
151 
152 	{"Capture", NULL, "SDOUT"},
153 };
154 
155 static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
156 {
157 	struct snd_soc_component *component = codec_dai->component;
158 
159 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
160 	case SND_SOC_DAIFMT_CBM_CFM:
161 		snd_soc_component_update_bits(component, CS35L32_ADSP_CTL,
162 				    CS35L32_ADSP_MASTER_MASK,
163 				CS35L32_ADSP_MASTER_MASK);
164 		break;
165 	case SND_SOC_DAIFMT_CBS_CFS:
166 		snd_soc_component_update_bits(component, CS35L32_ADSP_CTL,
167 				    CS35L32_ADSP_MASTER_MASK, 0);
168 		break;
169 	default:
170 		return -EINVAL;
171 	}
172 
173 	return 0;
174 }
175 
176 static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate)
177 {
178 	struct snd_soc_component *component = dai->component;
179 
180 	return snd_soc_component_update_bits(component, CS35L32_PWRCTL2,
181 					CS35L32_SDOUT_3ST, tristate << 3);
182 }
183 
184 static const struct snd_soc_dai_ops cs35l32_ops = {
185 	.set_fmt = cs35l32_set_dai_fmt,
186 	.set_tristate = cs35l32_set_tristate,
187 };
188 
189 static struct snd_soc_dai_driver cs35l32_dai[] = {
190 	{
191 		.name = "cs35l32-monitor",
192 		.id = 0,
193 		.capture = {
194 			.stream_name = "Capture",
195 			.channels_min = 2,
196 			.channels_max = 2,
197 			.rates = CS35L32_RATES,
198 			.formats = CS35L32_FORMATS,
199 		},
200 		.ops = &cs35l32_ops,
201 		.symmetric_rates = 1,
202 	}
203 };
204 
205 static int cs35l32_component_set_sysclk(struct snd_soc_component *component,
206 			      int clk_id, int source, unsigned int freq, int dir)
207 {
208 	unsigned int val;
209 
210 	switch (freq) {
211 	case 6000000:
212 		val = CS35L32_MCLK_RATIO;
213 		break;
214 	case 12000000:
215 		val = CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO;
216 		break;
217 	case 6144000:
218 		val = 0;
219 		break;
220 	case 12288000:
221 		val = CS35L32_MCLK_DIV2_MASK;
222 		break;
223 	default:
224 		return -EINVAL;
225 	}
226 
227 	return snd_soc_component_update_bits(component, CS35L32_CLK_CTL,
228 			CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO_MASK, val);
229 }
230 
231 static const struct snd_soc_component_driver soc_component_dev_cs35l32 = {
232 	.set_sysclk		= cs35l32_component_set_sysclk,
233 	.controls		= cs35l32_snd_controls,
234 	.num_controls		= ARRAY_SIZE(cs35l32_snd_controls),
235 	.dapm_widgets		= cs35l32_dapm_widgets,
236 	.num_dapm_widgets	= ARRAY_SIZE(cs35l32_dapm_widgets),
237 	.dapm_routes		= cs35l32_audio_map,
238 	.num_dapm_routes	= ARRAY_SIZE(cs35l32_audio_map),
239 	.idle_bias_on		= 1,
240 	.use_pmdown_time	= 1,
241 	.endianness		= 1,
242 	.non_legacy_dai_naming	= 1,
243 };
244 
245 /* Current and threshold powerup sequence Pg37 in datasheet */
246 static const struct reg_sequence cs35l32_monitor_patch[] = {
247 
248 	{ 0x00, 0x99 },
249 	{ 0x48, 0x17 },
250 	{ 0x49, 0x56 },
251 	{ 0x43, 0x01 },
252 	{ 0x3B, 0x62 },
253 	{ 0x3C, 0x80 },
254 	{ 0x00, 0x00 },
255 };
256 
257 static const struct regmap_config cs35l32_regmap = {
258 	.reg_bits = 8,
259 	.val_bits = 8,
260 
261 	.max_register = CS35L32_MAX_REGISTER,
262 	.reg_defaults = cs35l32_reg_defaults,
263 	.num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults),
264 	.volatile_reg = cs35l32_volatile_register,
265 	.readable_reg = cs35l32_readable_register,
266 	.precious_reg = cs35l32_precious_register,
267 	.cache_type = REGCACHE_RBTREE,
268 };
269 
270 static int cs35l32_handle_of_data(struct i2c_client *i2c_client,
271 				    struct cs35l32_platform_data *pdata)
272 {
273 	struct device_node *np = i2c_client->dev.of_node;
274 	unsigned int val;
275 
276 	if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0)
277 		pdata->sdout_share = val;
278 
279 	if (of_property_read_u32(np, "cirrus,boost-manager", &val))
280 		val = -1u;
281 
282 	switch (val) {
283 	case CS35L32_BOOST_MGR_AUTO:
284 	case CS35L32_BOOST_MGR_AUTO_AUDIO:
285 	case CS35L32_BOOST_MGR_BYPASS:
286 	case CS35L32_BOOST_MGR_FIXED:
287 		pdata->boost_mng = val;
288 		break;
289 	case -1u:
290 	default:
291 		dev_err(&i2c_client->dev,
292 			"Wrong cirrus,boost-manager DT value %d\n", val);
293 		pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
294 	}
295 
296 	if (of_property_read_u32(np, "cirrus,sdout-datacfg", &val))
297 		val = -1u;
298 	switch (val) {
299 	case CS35L32_DATA_CFG_LR_VP:
300 	case CS35L32_DATA_CFG_LR_STAT:
301 	case CS35L32_DATA_CFG_LR:
302 	case CS35L32_DATA_CFG_LR_VPSTAT:
303 		pdata->sdout_datacfg = val;
304 		break;
305 	case -1u:
306 	default:
307 		dev_err(&i2c_client->dev,
308 			"Wrong cirrus,sdout-datacfg DT value %d\n", val);
309 		pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
310 	}
311 
312 	if (of_property_read_u32(np, "cirrus,battery-threshold", &val))
313 		val = -1u;
314 	switch (val) {
315 	case CS35L32_BATT_THRESH_3_1V:
316 	case CS35L32_BATT_THRESH_3_2V:
317 	case CS35L32_BATT_THRESH_3_3V:
318 	case CS35L32_BATT_THRESH_3_4V:
319 		pdata->batt_thresh = val;
320 		break;
321 	case -1u:
322 	default:
323 		dev_err(&i2c_client->dev,
324 			"Wrong cirrus,battery-threshold DT value %d\n", val);
325 		pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
326 	}
327 
328 	if (of_property_read_u32(np, "cirrus,battery-recovery", &val))
329 		val = -1u;
330 	switch (val) {
331 	case CS35L32_BATT_RECOV_3_1V:
332 	case CS35L32_BATT_RECOV_3_2V:
333 	case CS35L32_BATT_RECOV_3_3V:
334 	case CS35L32_BATT_RECOV_3_4V:
335 	case CS35L32_BATT_RECOV_3_5V:
336 	case CS35L32_BATT_RECOV_3_6V:
337 		pdata->batt_recov = val;
338 		break;
339 	case -1u:
340 	default:
341 		dev_err(&i2c_client->dev,
342 			"Wrong cirrus,battery-recovery DT value %d\n", val);
343 		pdata->batt_recov = CS35L32_BATT_RECOV_3_4V;
344 	}
345 
346 	return 0;
347 }
348 
349 static int cs35l32_i2c_probe(struct i2c_client *i2c_client,
350 				       const struct i2c_device_id *id)
351 {
352 	struct cs35l32_private *cs35l32;
353 	struct cs35l32_platform_data *pdata =
354 		dev_get_platdata(&i2c_client->dev);
355 	int ret, i;
356 	unsigned int devid = 0;
357 	unsigned int reg;
358 
359 	cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(*cs35l32), GFP_KERNEL);
360 	if (!cs35l32)
361 		return -ENOMEM;
362 
363 	i2c_set_clientdata(i2c_client, cs35l32);
364 
365 	cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap);
366 	if (IS_ERR(cs35l32->regmap)) {
367 		ret = PTR_ERR(cs35l32->regmap);
368 		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
369 		return ret;
370 	}
371 
372 	if (pdata) {
373 		cs35l32->pdata = *pdata;
374 	} else {
375 		pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata),
376 				     GFP_KERNEL);
377 		if (!pdata)
378 			return -ENOMEM;
379 
380 		if (i2c_client->dev.of_node) {
381 			ret = cs35l32_handle_of_data(i2c_client,
382 						     &cs35l32->pdata);
383 			if (ret != 0)
384 				return ret;
385 		}
386 	}
387 
388 	for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++)
389 		cs35l32->supplies[i].supply = cs35l32_supply_names[i];
390 
391 	ret = devm_regulator_bulk_get(&i2c_client->dev,
392 				      ARRAY_SIZE(cs35l32->supplies),
393 				      cs35l32->supplies);
394 	if (ret != 0) {
395 		dev_err(&i2c_client->dev,
396 			"Failed to request supplies: %d\n", ret);
397 		return ret;
398 	}
399 
400 	ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
401 				    cs35l32->supplies);
402 	if (ret != 0) {
403 		dev_err(&i2c_client->dev,
404 			"Failed to enable supplies: %d\n", ret);
405 		return ret;
406 	}
407 
408 	/* Reset the Device */
409 	cs35l32->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
410 		"reset", GPIOD_OUT_LOW);
411 	if (IS_ERR(cs35l32->reset_gpio))
412 		return PTR_ERR(cs35l32->reset_gpio);
413 
414 	gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
415 
416 	/* initialize codec */
417 	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_AB, &reg);
418 	devid = (reg & 0xFF) << 12;
419 
420 	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_CD, &reg);
421 	devid |= (reg & 0xFF) << 4;
422 
423 	ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_E, &reg);
424 	devid |= (reg & 0xF0) >> 4;
425 
426 	if (devid != CS35L32_CHIP_ID) {
427 		ret = -ENODEV;
428 		dev_err(&i2c_client->dev,
429 			"CS35L32 Device ID (%X). Expected %X\n",
430 			devid, CS35L32_CHIP_ID);
431 		return ret;
432 	}
433 
434 	ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, &reg);
435 	if (ret < 0) {
436 		dev_err(&i2c_client->dev, "Get Revision ID failed\n");
437 		return ret;
438 	}
439 
440 	ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch,
441 				    ARRAY_SIZE(cs35l32_monitor_patch));
442 	if (ret < 0) {
443 		dev_err(&i2c_client->dev, "Failed to apply errata patch\n");
444 		return ret;
445 	}
446 
447 	dev_info(&i2c_client->dev,
448 		 "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF);
449 
450 	/* Setup VBOOST Management */
451 	if (cs35l32->pdata.boost_mng)
452 		regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR,
453 				   CS35L32_BOOST_MASK,
454 				cs35l32->pdata.boost_mng);
455 
456 	/* Setup ADSP Format Config */
457 	if (cs35l32->pdata.sdout_share)
458 		regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
459 				    CS35L32_ADSP_SHARE_MASK,
460 				cs35l32->pdata.sdout_share << 3);
461 
462 	/* Setup ADSP Data Configuration */
463 	if (cs35l32->pdata.sdout_datacfg)
464 		regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
465 				   CS35L32_ADSP_DATACFG_MASK,
466 				cs35l32->pdata.sdout_datacfg << 4);
467 
468 	/* Setup Low Battery Recovery  */
469 	if (cs35l32->pdata.batt_recov)
470 		regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
471 				   CS35L32_BATT_REC_MASK,
472 				cs35l32->pdata.batt_recov << 1);
473 
474 	/* Setup Low Battery Threshold */
475 	if (cs35l32->pdata.batt_thresh)
476 		regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
477 				   CS35L32_BATT_THRESH_MASK,
478 				cs35l32->pdata.batt_thresh << 4);
479 
480 	/* Power down the AMP */
481 	regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP,
482 			    CS35L32_PDN_AMP);
483 
484 	/* Clear MCLK Error Bit since we don't have the clock yet */
485 	ret = regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, &reg);
486 
487 	ret = devm_snd_soc_register_component(&i2c_client->dev,
488 			&soc_component_dev_cs35l32, cs35l32_dai,
489 			ARRAY_SIZE(cs35l32_dai));
490 	if (ret < 0)
491 		goto err_disable;
492 
493 	return 0;
494 
495 err_disable:
496 	regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
497 			       cs35l32->supplies);
498 	return ret;
499 }
500 
501 static int cs35l32_i2c_remove(struct i2c_client *i2c_client)
502 {
503 	struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client);
504 
505 	/* Hold down reset */
506 	gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
507 
508 	return 0;
509 }
510 
511 #ifdef CONFIG_PM
512 static int cs35l32_runtime_suspend(struct device *dev)
513 {
514 	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
515 
516 	regcache_cache_only(cs35l32->regmap, true);
517 	regcache_mark_dirty(cs35l32->regmap);
518 
519 	/* Hold down reset */
520 	gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
521 
522 	/* remove power */
523 	regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
524 			       cs35l32->supplies);
525 
526 	return 0;
527 }
528 
529 static int cs35l32_runtime_resume(struct device *dev)
530 {
531 	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
532 	int ret;
533 
534 	/* Enable power */
535 	ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
536 				    cs35l32->supplies);
537 	if (ret != 0) {
538 		dev_err(dev, "Failed to enable supplies: %d\n",
539 			ret);
540 		return ret;
541 	}
542 
543 	gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
544 
545 	regcache_cache_only(cs35l32->regmap, false);
546 	regcache_sync(cs35l32->regmap);
547 
548 	return 0;
549 }
550 #endif
551 
552 static const struct dev_pm_ops cs35l32_runtime_pm = {
553 	SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume,
554 			   NULL)
555 };
556 
557 static const struct of_device_id cs35l32_of_match[] = {
558 	{ .compatible = "cirrus,cs35l32", },
559 	{},
560 };
561 MODULE_DEVICE_TABLE(of, cs35l32_of_match);
562 
563 
564 static const struct i2c_device_id cs35l32_id[] = {
565 	{"cs35l32", 0},
566 	{}
567 };
568 
569 MODULE_DEVICE_TABLE(i2c, cs35l32_id);
570 
571 static struct i2c_driver cs35l32_i2c_driver = {
572 	.driver = {
573 		   .name = "cs35l32",
574 		   .pm = &cs35l32_runtime_pm,
575 		   .of_match_table = cs35l32_of_match,
576 		   },
577 	.id_table = cs35l32_id,
578 	.probe = cs35l32_i2c_probe,
579 	.remove = cs35l32_i2c_remove,
580 };
581 
582 module_i2c_driver(cs35l32_i2c_driver);
583 
584 MODULE_DESCRIPTION("ASoC CS35L32 driver");
585 MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin@cirrus.com>");
586 MODULE_LICENSE("GPL");
587