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Commit | Line | Data |
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493b67ef PU |
1 | /* |
2 | * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver | |
3 | * | |
4 | * Copyright (C) Nokia Corporation | |
5 | * | |
b4079ef4 | 6 | * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> |
493b67ef PU |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/i2c.h> | |
27 | #include <linux/gpio.h> | |
7c4e6492 | 28 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
493b67ef PU |
30 | #include <sound/tpa6130a2-plat.h> |
31 | #include <sound/soc.h> | |
493b67ef | 32 | #include <sound/tlv.h> |
ee5e4534 | 33 | #include <linux/of.h> |
f95a4883 | 34 | #include <linux/of_gpio.h> |
493b67ef PU |
35 | |
36 | #include "tpa6130a2.h" | |
37 | ||
0722d055 PU |
38 | enum tpa_model { |
39 | TPA6130A2, | |
40 | TPA6140A2, | |
41 | }; | |
42 | ||
ebab1b1d | 43 | static struct i2c_client *tpa6130a2_client; |
493b67ef PU |
44 | |
45 | /* This struct is used to save the context */ | |
46 | struct tpa6130a2_data { | |
47 | struct mutex mutex; | |
48 | unsigned char regs[TPA6130A2_CACHEREGNUM]; | |
ad8332c1 | 49 | struct regulator *supply; |
493b67ef | 50 | int power_gpio; |
d5876ce1 | 51 | u8 power_state:1; |
e5e5b31e | 52 | enum tpa_model id; |
493b67ef PU |
53 | }; |
54 | ||
55 | static int tpa6130a2_i2c_read(int reg) | |
56 | { | |
57 | struct tpa6130a2_data *data; | |
58 | int val; | |
59 | ||
773392b2 TI |
60 | if (WARN_ON(!tpa6130a2_client)) |
61 | return -EINVAL; | |
493b67ef PU |
62 | data = i2c_get_clientdata(tpa6130a2_client); |
63 | ||
64 | /* If powered off, return the cached value */ | |
65 | if (data->power_state) { | |
66 | val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); | |
67 | if (val < 0) | |
68 | dev_err(&tpa6130a2_client->dev, "Read failed\n"); | |
69 | else | |
70 | data->regs[reg] = val; | |
71 | } else { | |
72 | val = data->regs[reg]; | |
73 | } | |
74 | ||
75 | return val; | |
76 | } | |
77 | ||
78 | static int tpa6130a2_i2c_write(int reg, u8 value) | |
79 | { | |
80 | struct tpa6130a2_data *data; | |
81 | int val = 0; | |
82 | ||
773392b2 TI |
83 | if (WARN_ON(!tpa6130a2_client)) |
84 | return -EINVAL; | |
493b67ef PU |
85 | data = i2c_get_clientdata(tpa6130a2_client); |
86 | ||
87 | if (data->power_state) { | |
88 | val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); | |
7a479b02 | 89 | if (val < 0) { |
493b67ef | 90 | dev_err(&tpa6130a2_client->dev, "Write failed\n"); |
7a479b02 AL |
91 | return val; |
92 | } | |
493b67ef PU |
93 | } |
94 | ||
95 | /* Either powered on or off, we save the context */ | |
96 | data->regs[reg] = value; | |
97 | ||
98 | return val; | |
99 | } | |
100 | ||
101 | static u8 tpa6130a2_read(int reg) | |
102 | { | |
103 | struct tpa6130a2_data *data; | |
104 | ||
773392b2 TI |
105 | if (WARN_ON(!tpa6130a2_client)) |
106 | return 0; | |
493b67ef PU |
107 | data = i2c_get_clientdata(tpa6130a2_client); |
108 | ||
109 | return data->regs[reg]; | |
110 | } | |
111 | ||
872a64d7 | 112 | static int tpa6130a2_initialize(void) |
493b67ef PU |
113 | { |
114 | struct tpa6130a2_data *data; | |
872a64d7 | 115 | int i, ret = 0; |
493b67ef | 116 | |
773392b2 TI |
117 | if (WARN_ON(!tpa6130a2_client)) |
118 | return -EINVAL; | |
493b67ef PU |
119 | data = i2c_get_clientdata(tpa6130a2_client); |
120 | ||
872a64d7 PU |
121 | for (i = 1; i < TPA6130A2_REG_VERSION; i++) { |
122 | ret = tpa6130a2_i2c_write(i, data->regs[i]); | |
123 | if (ret < 0) | |
124 | break; | |
125 | } | |
126 | ||
127 | return ret; | |
493b67ef PU |
128 | } |
129 | ||
d5876ce1 | 130 | static int tpa6130a2_power(u8 power) |
493b67ef PU |
131 | { |
132 | struct tpa6130a2_data *data; | |
133 | u8 val; | |
75e3f313 | 134 | int ret = 0; |
493b67ef | 135 | |
773392b2 TI |
136 | if (WARN_ON(!tpa6130a2_client)) |
137 | return -EINVAL; | |
493b67ef PU |
138 | data = i2c_get_clientdata(tpa6130a2_client); |
139 | ||
140 | mutex_lock(&data->mutex); | |
d5876ce1 PU |
141 | if (power == data->power_state) |
142 | goto exit; | |
7c4e6492 | 143 | |
d5876ce1 | 144 | if (power) { |
ad8332c1 | 145 | ret = regulator_enable(data->supply); |
7c4e6492 IK |
146 | if (ret != 0) { |
147 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 148 | "Failed to enable supply: %d\n", ret); |
7c4e6492 | 149 | goto exit; |
493b67ef | 150 | } |
0656f6cf JN |
151 | /* Power on */ |
152 | if (data->power_gpio >= 0) | |
153 | gpio_set_value(data->power_gpio, 1); | |
7c4e6492 IK |
154 | |
155 | data->power_state = 1; | |
872a64d7 PU |
156 | ret = tpa6130a2_initialize(); |
157 | if (ret < 0) { | |
158 | dev_err(&tpa6130a2_client->dev, | |
159 | "Failed to initialize chip\n"); | |
160 | if (data->power_gpio >= 0) | |
161 | gpio_set_value(data->power_gpio, 0); | |
162 | regulator_disable(data->supply); | |
163 | data->power_state = 0; | |
164 | goto exit; | |
165 | } | |
d5876ce1 | 166 | } else { |
493b67ef PU |
167 | /* set SWS */ |
168 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
169 | val |= TPA6130A2_SWS; | |
170 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
7c4e6492 | 171 | |
493b67ef | 172 | /* Power off */ |
7c4e6492 | 173 | if (data->power_gpio >= 0) |
493b67ef | 174 | gpio_set_value(data->power_gpio, 0); |
7c4e6492 | 175 | |
ad8332c1 | 176 | ret = regulator_disable(data->supply); |
7c4e6492 IK |
177 | if (ret != 0) { |
178 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 179 | "Failed to disable supply: %d\n", ret); |
7c4e6492 | 180 | goto exit; |
493b67ef | 181 | } |
7c4e6492 IK |
182 | |
183 | data->power_state = 0; | |
493b67ef | 184 | } |
7c4e6492 IK |
185 | |
186 | exit: | |
493b67ef | 187 | mutex_unlock(&data->mutex); |
7c4e6492 | 188 | return ret; |
493b67ef PU |
189 | } |
190 | ||
bd843edf | 191 | static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
192 | struct snd_ctl_elem_value *ucontrol) |
193 | { | |
194 | struct soc_mixer_control *mc = | |
195 | (struct soc_mixer_control *)kcontrol->private_value; | |
196 | struct tpa6130a2_data *data; | |
197 | unsigned int reg = mc->reg; | |
198 | unsigned int shift = mc->shift; | |
bd843edf PU |
199 | int max = mc->max; |
200 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
201 | unsigned int invert = mc->invert; |
202 | ||
773392b2 TI |
203 | if (WARN_ON(!tpa6130a2_client)) |
204 | return -EINVAL; | |
493b67ef PU |
205 | data = i2c_get_clientdata(tpa6130a2_client); |
206 | ||
207 | mutex_lock(&data->mutex); | |
208 | ||
209 | ucontrol->value.integer.value[0] = | |
210 | (tpa6130a2_read(reg) >> shift) & mask; | |
211 | ||
212 | if (invert) | |
213 | ucontrol->value.integer.value[0] = | |
bd843edf | 214 | max - ucontrol->value.integer.value[0]; |
493b67ef PU |
215 | |
216 | mutex_unlock(&data->mutex); | |
217 | return 0; | |
218 | } | |
219 | ||
bd843edf | 220 | static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
221 | struct snd_ctl_elem_value *ucontrol) |
222 | { | |
223 | struct soc_mixer_control *mc = | |
224 | (struct soc_mixer_control *)kcontrol->private_value; | |
225 | struct tpa6130a2_data *data; | |
226 | unsigned int reg = mc->reg; | |
227 | unsigned int shift = mc->shift; | |
bd843edf PU |
228 | int max = mc->max; |
229 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
230 | unsigned int invert = mc->invert; |
231 | unsigned int val = (ucontrol->value.integer.value[0] & mask); | |
232 | unsigned int val_reg; | |
233 | ||
773392b2 TI |
234 | if (WARN_ON(!tpa6130a2_client)) |
235 | return -EINVAL; | |
493b67ef PU |
236 | data = i2c_get_clientdata(tpa6130a2_client); |
237 | ||
238 | if (invert) | |
bd843edf | 239 | val = max - val; |
493b67ef PU |
240 | |
241 | mutex_lock(&data->mutex); | |
242 | ||
243 | val_reg = tpa6130a2_read(reg); | |
244 | if (((val_reg >> shift) & mask) == val) { | |
245 | mutex_unlock(&data->mutex); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | val_reg &= ~(mask << shift); | |
250 | val_reg |= val << shift; | |
251 | tpa6130a2_i2c_write(reg, val_reg); | |
252 | ||
253 | mutex_unlock(&data->mutex); | |
254 | ||
255 | return 1; | |
256 | } | |
257 | ||
258 | /* | |
259 | * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going | |
260 | * down in gain. | |
261 | */ | |
4e0e5f80 | 262 | static const DECLARE_TLV_DB_RANGE(tpa6130_tlv, |
493b67ef PU |
263 | 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), |
264 | 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), | |
265 | 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), | |
266 | 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), | |
267 | 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), | |
268 | 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), | |
269 | 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), | |
270 | 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), | |
271 | 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), | |
4e0e5f80 LPC |
272 | 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0) |
273 | ); | |
493b67ef PU |
274 | |
275 | static const struct snd_kcontrol_new tpa6130a2_controls[] = { | |
276 | SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", | |
277 | TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, | |
bd843edf | 278 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
493b67ef PU |
279 | tpa6130_tlv), |
280 | }; | |
281 | ||
4e0e5f80 | 282 | static const DECLARE_TLV_DB_RANGE(tpa6140_tlv, |
e5e5b31e PU |
283 | 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), |
284 | 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), | |
4e0e5f80 LPC |
285 | 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0) |
286 | ); | |
e5e5b31e PU |
287 | |
288 | static const struct snd_kcontrol_new tpa6140a2_controls[] = { | |
826e962c PU |
289 | SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", |
290 | TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, | |
bd843edf | 291 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
826e962c | 292 | tpa6140_tlv), |
e5e5b31e PU |
293 | }; |
294 | ||
493b67ef PU |
295 | /* |
296 | * Enable or disable channel (left or right) | |
297 | * The bit number for mute and amplifier are the same per channel: | |
298 | * bit 6: Right channel | |
299 | * bit 7: Left channel | |
300 | * in both registers. | |
301 | */ | |
302 | static void tpa6130a2_channel_enable(u8 channel, int enable) | |
303 | { | |
493b67ef PU |
304 | u8 val; |
305 | ||
493b67ef PU |
306 | if (enable) { |
307 | /* Enable channel */ | |
308 | /* Enable amplifier */ | |
309 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
310 | val |= channel; | |
d534bacd | 311 | val &= ~TPA6130A2_SWS; |
493b67ef PU |
312 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
313 | ||
314 | /* Unmute channel */ | |
315 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
316 | val &= ~channel; | |
317 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
318 | } else { | |
319 | /* Disable channel */ | |
320 | /* Mute channel */ | |
321 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
322 | val |= channel; | |
323 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
324 | ||
325 | /* Disable amplifier */ | |
326 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
327 | val &= ~channel; | |
328 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
329 | } | |
330 | } | |
331 | ||
39646871 | 332 | int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable) |
493b67ef | 333 | { |
7c4e6492 | 334 | int ret = 0; |
39646871 | 335 | if (enable) { |
7c4e6492 | 336 | ret = tpa6130a2_power(1); |
39646871 PU |
337 | if (ret < 0) |
338 | return ret; | |
339 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
340 | 1); | |
341 | } else { | |
342 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
343 | 0); | |
7c4e6492 | 344 | ret = tpa6130a2_power(0); |
493b67ef | 345 | } |
39646871 | 346 | |
7c4e6492 | 347 | return ret; |
493b67ef | 348 | } |
39646871 | 349 | EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable); |
493b67ef PU |
350 | |
351 | int tpa6130a2_add_controls(struct snd_soc_codec *codec) | |
352 | { | |
e5e5b31e PU |
353 | struct tpa6130a2_data *data; |
354 | ||
872a64d7 PU |
355 | if (tpa6130a2_client == NULL) |
356 | return -ENODEV; | |
357 | ||
e5e5b31e PU |
358 | data = i2c_get_clientdata(tpa6130a2_client); |
359 | ||
e5e5b31e | 360 | if (data->id == TPA6140A2) |
022658be | 361 | return snd_soc_add_codec_controls(codec, tpa6140a2_controls, |
e5e5b31e PU |
362 | ARRAY_SIZE(tpa6140a2_controls)); |
363 | else | |
022658be | 364 | return snd_soc_add_codec_controls(codec, tpa6130a2_controls, |
e5e5b31e | 365 | ARRAY_SIZE(tpa6130a2_controls)); |
493b67ef PU |
366 | } |
367 | EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); | |
368 | ||
7a79e94e BP |
369 | static int tpa6130a2_probe(struct i2c_client *client, |
370 | const struct i2c_device_id *id) | |
493b67ef PU |
371 | { |
372 | struct device *dev; | |
373 | struct tpa6130a2_data *data; | |
f95a4883 SR |
374 | struct tpa6130a2_platform_data *pdata = client->dev.platform_data; |
375 | struct device_node *np = client->dev.of_node; | |
ad8332c1 JN |
376 | const char *regulator; |
377 | int ret; | |
493b67ef PU |
378 | |
379 | dev = &client->dev; | |
380 | ||
6945e9f9 | 381 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
656e3435 | 382 | if (!data) |
493b67ef | 383 | return -ENOMEM; |
493b67ef | 384 | |
f95a4883 SR |
385 | if (pdata) { |
386 | data->power_gpio = pdata->power_gpio; | |
387 | } else if (np) { | |
388 | data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); | |
389 | } else { | |
390 | dev_err(dev, "Platform data not set\n"); | |
391 | dump_stack(); | |
392 | return -ENODEV; | |
393 | } | |
394 | ||
493b67ef PU |
395 | tpa6130a2_client = client; |
396 | ||
397 | i2c_set_clientdata(tpa6130a2_client, data); | |
398 | ||
07441006 | 399 | data->id = id->driver_data; |
493b67ef PU |
400 | |
401 | mutex_init(&data->mutex); | |
402 | ||
403 | /* Set default register values */ | |
404 | data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; | |
405 | data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | | |
406 | TPA6130A2_MUTE_L; | |
407 | ||
408 | if (data->power_gpio >= 0) { | |
d06080cf SK |
409 | ret = devm_gpio_request(dev, data->power_gpio, |
410 | "tpa6130a2 enable"); | |
493b67ef PU |
411 | if (ret < 0) { |
412 | dev_err(dev, "Failed to request power GPIO (%d)\n", | |
413 | data->power_gpio); | |
7c4e6492 | 414 | goto err_gpio; |
493b67ef PU |
415 | } |
416 | gpio_direction_output(data->power_gpio, 0); | |
493b67ef PU |
417 | } |
418 | ||
e5e5b31e | 419 | switch (data->id) { |
ad8332c1 JN |
420 | default: |
421 | dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", | |
07441006 | 422 | data->id); |
2138301e | 423 | case TPA6130A2: |
ad8332c1 | 424 | regulator = "Vdd"; |
2138301e IK |
425 | break; |
426 | case TPA6140A2: | |
ad8332c1 | 427 | regulator = "AVdd"; |
2138301e | 428 | break; |
2138301e | 429 | } |
7c4e6492 | 430 | |
d06080cf | 431 | data->supply = devm_regulator_get(dev, regulator); |
ad8332c1 JN |
432 | if (IS_ERR(data->supply)) { |
433 | ret = PTR_ERR(data->supply); | |
434 | dev_err(dev, "Failed to request supply: %d\n", ret); | |
d06080cf | 435 | goto err_gpio; |
7c4e6492 IK |
436 | } |
437 | ||
438 | ret = tpa6130a2_power(1); | |
439 | if (ret != 0) | |
d06080cf | 440 | goto err_gpio; |
7c4e6492 | 441 | |
493b67ef PU |
442 | |
443 | /* Read version */ | |
444 | ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & | |
445 | TPA6130A2_VERSION_MASK; | |
446 | if ((ret != 1) && (ret != 2)) | |
447 | dev_warn(dev, "UNTESTED version detected (%d)\n", ret); | |
448 | ||
449 | /* Disable the chip */ | |
7c4e6492 IK |
450 | ret = tpa6130a2_power(0); |
451 | if (ret != 0) | |
d06080cf | 452 | goto err_gpio; |
493b67ef PU |
453 | |
454 | return 0; | |
7c4e6492 | 455 | |
7c4e6492 | 456 | err_gpio: |
ebab1b1d | 457 | tpa6130a2_client = NULL; |
493b67ef PU |
458 | |
459 | return ret; | |
460 | } | |
461 | ||
7a79e94e | 462 | static int tpa6130a2_remove(struct i2c_client *client) |
493b67ef | 463 | { |
493b67ef | 464 | tpa6130a2_power(0); |
ebab1b1d | 465 | tpa6130a2_client = NULL; |
493b67ef PU |
466 | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static const struct i2c_device_id tpa6130a2_id[] = { | |
07441006 PU |
471 | { "tpa6130a2", TPA6130A2 }, |
472 | { "tpa6140a2", TPA6140A2 }, | |
493b67ef PU |
473 | { } |
474 | }; | |
475 | MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); | |
476 | ||
f95a4883 SR |
477 | #if IS_ENABLED(CONFIG_OF) |
478 | static const struct of_device_id tpa6130a2_of_match[] = { | |
479 | { .compatible = "ti,tpa6130a2", }, | |
480 | { .compatible = "ti,tpa6140a2" }, | |
481 | {}, | |
482 | }; | |
483 | MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); | |
484 | #endif | |
485 | ||
493b67ef PU |
486 | static struct i2c_driver tpa6130a2_i2c_driver = { |
487 | .driver = { | |
488 | .name = "tpa6130a2", | |
f95a4883 | 489 | .of_match_table = of_match_ptr(tpa6130a2_of_match), |
493b67ef PU |
490 | }, |
491 | .probe = tpa6130a2_probe, | |
7a79e94e | 492 | .remove = tpa6130a2_remove, |
493b67ef PU |
493 | .id_table = tpa6130a2_id, |
494 | }; | |
495 | ||
f062e2b6 | 496 | module_i2c_driver(tpa6130a2_i2c_driver); |
493b67ef | 497 | |
b4079ef4 | 498 | MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); |
493b67ef PU |
499 | MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); |
500 | MODULE_LICENSE("GPL"); |