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493b67ef PU |
1 | /* |
2 | * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver | |
3 | * | |
4 | * Copyright (C) Nokia Corporation | |
5 | * | |
6 | * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com> | |
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> | |
32 | #include <sound/soc-dapm.h> | |
33 | #include <sound/tlv.h> | |
34 | ||
35 | #include "tpa6130a2.h" | |
36 | ||
ebab1b1d | 37 | static struct i2c_client *tpa6130a2_client; |
493b67ef PU |
38 | |
39 | /* This struct is used to save the context */ | |
40 | struct tpa6130a2_data { | |
41 | struct mutex mutex; | |
42 | unsigned char regs[TPA6130A2_CACHEREGNUM]; | |
ad8332c1 | 43 | struct regulator *supply; |
493b67ef PU |
44 | int power_gpio; |
45 | unsigned char power_state; | |
e5e5b31e | 46 | enum tpa_model id; |
493b67ef PU |
47 | }; |
48 | ||
49 | static int tpa6130a2_i2c_read(int reg) | |
50 | { | |
51 | struct tpa6130a2_data *data; | |
52 | int val; | |
53 | ||
54 | BUG_ON(tpa6130a2_client == NULL); | |
55 | data = i2c_get_clientdata(tpa6130a2_client); | |
56 | ||
57 | /* If powered off, return the cached value */ | |
58 | if (data->power_state) { | |
59 | val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); | |
60 | if (val < 0) | |
61 | dev_err(&tpa6130a2_client->dev, "Read failed\n"); | |
62 | else | |
63 | data->regs[reg] = val; | |
64 | } else { | |
65 | val = data->regs[reg]; | |
66 | } | |
67 | ||
68 | return val; | |
69 | } | |
70 | ||
71 | static int tpa6130a2_i2c_write(int reg, u8 value) | |
72 | { | |
73 | struct tpa6130a2_data *data; | |
74 | int val = 0; | |
75 | ||
76 | BUG_ON(tpa6130a2_client == NULL); | |
77 | data = i2c_get_clientdata(tpa6130a2_client); | |
78 | ||
79 | if (data->power_state) { | |
80 | val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); | |
81 | if (val < 0) | |
82 | dev_err(&tpa6130a2_client->dev, "Write failed\n"); | |
83 | } | |
84 | ||
85 | /* Either powered on or off, we save the context */ | |
86 | data->regs[reg] = value; | |
87 | ||
88 | return val; | |
89 | } | |
90 | ||
91 | static u8 tpa6130a2_read(int reg) | |
92 | { | |
93 | struct tpa6130a2_data *data; | |
94 | ||
95 | BUG_ON(tpa6130a2_client == NULL); | |
96 | data = i2c_get_clientdata(tpa6130a2_client); | |
97 | ||
98 | return data->regs[reg]; | |
99 | } | |
100 | ||
872a64d7 | 101 | static int tpa6130a2_initialize(void) |
493b67ef PU |
102 | { |
103 | struct tpa6130a2_data *data; | |
872a64d7 | 104 | int i, ret = 0; |
493b67ef PU |
105 | |
106 | BUG_ON(tpa6130a2_client == NULL); | |
107 | data = i2c_get_clientdata(tpa6130a2_client); | |
108 | ||
872a64d7 PU |
109 | for (i = 1; i < TPA6130A2_REG_VERSION; i++) { |
110 | ret = tpa6130a2_i2c_write(i, data->regs[i]); | |
111 | if (ret < 0) | |
112 | break; | |
113 | } | |
114 | ||
115 | return ret; | |
493b67ef PU |
116 | } |
117 | ||
7c4e6492 | 118 | static int tpa6130a2_power(int power) |
493b67ef PU |
119 | { |
120 | struct tpa6130a2_data *data; | |
121 | u8 val; | |
7c4e6492 | 122 | int ret; |
493b67ef PU |
123 | |
124 | BUG_ON(tpa6130a2_client == NULL); | |
125 | data = i2c_get_clientdata(tpa6130a2_client); | |
126 | ||
127 | mutex_lock(&data->mutex); | |
128 | if (power) { | |
129 | /* Power on */ | |
7c4e6492 | 130 | if (data->power_gpio >= 0) |
493b67ef | 131 | gpio_set_value(data->power_gpio, 1); |
7c4e6492 | 132 | |
ad8332c1 | 133 | ret = regulator_enable(data->supply); |
7c4e6492 IK |
134 | if (ret != 0) { |
135 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 136 | "Failed to enable supply: %d\n", ret); |
7c4e6492 | 137 | goto exit; |
493b67ef | 138 | } |
7c4e6492 IK |
139 | |
140 | data->power_state = 1; | |
872a64d7 PU |
141 | ret = tpa6130a2_initialize(); |
142 | if (ret < 0) { | |
143 | dev_err(&tpa6130a2_client->dev, | |
144 | "Failed to initialize chip\n"); | |
145 | if (data->power_gpio >= 0) | |
146 | gpio_set_value(data->power_gpio, 0); | |
147 | regulator_disable(data->supply); | |
148 | data->power_state = 0; | |
149 | goto exit; | |
150 | } | |
7c4e6492 | 151 | |
493b67ef PU |
152 | /* Clear SWS */ |
153 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
154 | val &= ~TPA6130A2_SWS; | |
155 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
156 | } else { | |
157 | /* set SWS */ | |
158 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
159 | val |= TPA6130A2_SWS; | |
160 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
7c4e6492 | 161 | |
493b67ef | 162 | /* Power off */ |
7c4e6492 | 163 | if (data->power_gpio >= 0) |
493b67ef | 164 | gpio_set_value(data->power_gpio, 0); |
7c4e6492 | 165 | |
ad8332c1 | 166 | ret = regulator_disable(data->supply); |
7c4e6492 IK |
167 | if (ret != 0) { |
168 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 169 | "Failed to disable supply: %d\n", ret); |
7c4e6492 | 170 | goto exit; |
493b67ef | 171 | } |
7c4e6492 IK |
172 | |
173 | data->power_state = 0; | |
493b67ef | 174 | } |
7c4e6492 IK |
175 | |
176 | exit: | |
493b67ef | 177 | mutex_unlock(&data->mutex); |
7c4e6492 | 178 | return ret; |
493b67ef PU |
179 | } |
180 | ||
bd843edf | 181 | static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
182 | struct snd_ctl_elem_value *ucontrol) |
183 | { | |
184 | struct soc_mixer_control *mc = | |
185 | (struct soc_mixer_control *)kcontrol->private_value; | |
186 | struct tpa6130a2_data *data; | |
187 | unsigned int reg = mc->reg; | |
188 | unsigned int shift = mc->shift; | |
bd843edf PU |
189 | int max = mc->max; |
190 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
191 | unsigned int invert = mc->invert; |
192 | ||
193 | BUG_ON(tpa6130a2_client == NULL); | |
194 | data = i2c_get_clientdata(tpa6130a2_client); | |
195 | ||
196 | mutex_lock(&data->mutex); | |
197 | ||
198 | ucontrol->value.integer.value[0] = | |
199 | (tpa6130a2_read(reg) >> shift) & mask; | |
200 | ||
201 | if (invert) | |
202 | ucontrol->value.integer.value[0] = | |
bd843edf | 203 | max - ucontrol->value.integer.value[0]; |
493b67ef PU |
204 | |
205 | mutex_unlock(&data->mutex); | |
206 | return 0; | |
207 | } | |
208 | ||
bd843edf | 209 | static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
210 | struct snd_ctl_elem_value *ucontrol) |
211 | { | |
212 | struct soc_mixer_control *mc = | |
213 | (struct soc_mixer_control *)kcontrol->private_value; | |
214 | struct tpa6130a2_data *data; | |
215 | unsigned int reg = mc->reg; | |
216 | unsigned int shift = mc->shift; | |
bd843edf PU |
217 | int max = mc->max; |
218 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
219 | unsigned int invert = mc->invert; |
220 | unsigned int val = (ucontrol->value.integer.value[0] & mask); | |
221 | unsigned int val_reg; | |
222 | ||
223 | BUG_ON(tpa6130a2_client == NULL); | |
224 | data = i2c_get_clientdata(tpa6130a2_client); | |
225 | ||
226 | if (invert) | |
bd843edf | 227 | val = max - val; |
493b67ef PU |
228 | |
229 | mutex_lock(&data->mutex); | |
230 | ||
231 | val_reg = tpa6130a2_read(reg); | |
232 | if (((val_reg >> shift) & mask) == val) { | |
233 | mutex_unlock(&data->mutex); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | val_reg &= ~(mask << shift); | |
238 | val_reg |= val << shift; | |
239 | tpa6130a2_i2c_write(reg, val_reg); | |
240 | ||
241 | mutex_unlock(&data->mutex); | |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
246 | /* | |
247 | * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going | |
248 | * down in gain. | |
249 | */ | |
250 | static const unsigned int tpa6130_tlv[] = { | |
251 | TLV_DB_RANGE_HEAD(10), | |
252 | 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), | |
253 | 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), | |
254 | 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), | |
255 | 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), | |
256 | 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), | |
257 | 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), | |
258 | 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), | |
259 | 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), | |
260 | 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), | |
261 | 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0), | |
262 | }; | |
263 | ||
264 | static const struct snd_kcontrol_new tpa6130a2_controls[] = { | |
265 | SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", | |
266 | TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, | |
bd843edf | 267 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
493b67ef PU |
268 | tpa6130_tlv), |
269 | }; | |
270 | ||
e5e5b31e PU |
271 | static const unsigned int tpa6140_tlv[] = { |
272 | TLV_DB_RANGE_HEAD(3), | |
273 | 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), | |
274 | 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), | |
275 | 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0), | |
276 | }; | |
277 | ||
278 | static const struct snd_kcontrol_new tpa6140a2_controls[] = { | |
826e962c PU |
279 | SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", |
280 | TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, | |
bd843edf | 281 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
826e962c | 282 | tpa6140_tlv), |
e5e5b31e PU |
283 | }; |
284 | ||
493b67ef PU |
285 | /* |
286 | * Enable or disable channel (left or right) | |
287 | * The bit number for mute and amplifier are the same per channel: | |
288 | * bit 6: Right channel | |
289 | * bit 7: Left channel | |
290 | * in both registers. | |
291 | */ | |
292 | static void tpa6130a2_channel_enable(u8 channel, int enable) | |
293 | { | |
493b67ef PU |
294 | u8 val; |
295 | ||
493b67ef PU |
296 | if (enable) { |
297 | /* Enable channel */ | |
298 | /* Enable amplifier */ | |
299 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
300 | val |= channel; | |
301 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
302 | ||
303 | /* Unmute channel */ | |
304 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
305 | val &= ~channel; | |
306 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
307 | } else { | |
308 | /* Disable channel */ | |
309 | /* Mute channel */ | |
310 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
311 | val |= channel; | |
312 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
313 | ||
314 | /* Disable amplifier */ | |
315 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
316 | val &= ~channel; | |
317 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
318 | } | |
319 | } | |
320 | ||
321 | static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w, | |
322 | struct snd_kcontrol *kcontrol, int event) | |
323 | { | |
324 | switch (event) { | |
325 | case SND_SOC_DAPM_POST_PMU: | |
326 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1); | |
327 | break; | |
328 | case SND_SOC_DAPM_POST_PMD: | |
329 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0); | |
330 | break; | |
331 | } | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w, | |
336 | struct snd_kcontrol *kcontrol, int event) | |
337 | { | |
338 | switch (event) { | |
339 | case SND_SOC_DAPM_POST_PMU: | |
340 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1); | |
341 | break; | |
342 | case SND_SOC_DAPM_POST_PMD: | |
343 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0); | |
344 | break; | |
345 | } | |
346 | return 0; | |
347 | } | |
348 | ||
349 | static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w, | |
350 | struct snd_kcontrol *kcontrol, int event) | |
351 | { | |
7c4e6492 IK |
352 | int ret = 0; |
353 | ||
493b67ef PU |
354 | switch (event) { |
355 | case SND_SOC_DAPM_POST_PMU: | |
7c4e6492 | 356 | ret = tpa6130a2_power(1); |
493b67ef PU |
357 | break; |
358 | case SND_SOC_DAPM_POST_PMD: | |
7c4e6492 | 359 | ret = tpa6130a2_power(0); |
493b67ef PU |
360 | break; |
361 | } | |
7c4e6492 | 362 | return ret; |
493b67ef PU |
363 | } |
364 | ||
365 | static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = { | |
366 | SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM, | |
367 | 0, 0, NULL, 0, tpa6130a2_left_event, | |
368 | SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), | |
369 | SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM, | |
370 | 0, 0, NULL, 0, tpa6130a2_right_event, | |
371 | SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), | |
372 | SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM, | |
373 | 0, 0, tpa6130a2_supply_event, | |
374 | SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), | |
375 | /* Outputs */ | |
266d38c8 JN |
376 | SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"), |
377 | SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"), | |
493b67ef PU |
378 | }; |
379 | ||
380 | static const struct snd_soc_dapm_route audio_map[] = { | |
381 | {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"}, | |
382 | {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"}, | |
383 | ||
384 | {"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"}, | |
385 | {"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"}, | |
386 | }; | |
387 | ||
388 | int tpa6130a2_add_controls(struct snd_soc_codec *codec) | |
389 | { | |
e5e5b31e PU |
390 | struct tpa6130a2_data *data; |
391 | ||
872a64d7 PU |
392 | if (tpa6130a2_client == NULL) |
393 | return -ENODEV; | |
394 | ||
e5e5b31e PU |
395 | data = i2c_get_clientdata(tpa6130a2_client); |
396 | ||
493b67ef PU |
397 | snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets, |
398 | ARRAY_SIZE(tpa6130a2_dapm_widgets)); | |
399 | ||
400 | snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); | |
401 | ||
e5e5b31e PU |
402 | if (data->id == TPA6140A2) |
403 | return snd_soc_add_controls(codec, tpa6140a2_controls, | |
404 | ARRAY_SIZE(tpa6140a2_controls)); | |
405 | else | |
406 | return snd_soc_add_controls(codec, tpa6130a2_controls, | |
407 | ARRAY_SIZE(tpa6130a2_controls)); | |
493b67ef PU |
408 | |
409 | } | |
410 | EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); | |
411 | ||
735fe4cf MB |
412 | static int __devinit tpa6130a2_probe(struct i2c_client *client, |
413 | const struct i2c_device_id *id) | |
493b67ef PU |
414 | { |
415 | struct device *dev; | |
416 | struct tpa6130a2_data *data; | |
417 | struct tpa6130a2_platform_data *pdata; | |
ad8332c1 JN |
418 | const char *regulator; |
419 | int ret; | |
493b67ef PU |
420 | |
421 | dev = &client->dev; | |
422 | ||
423 | if (client->dev.platform_data == NULL) { | |
424 | dev_err(dev, "Platform data not set\n"); | |
425 | dump_stack(); | |
426 | return -ENODEV; | |
427 | } | |
428 | ||
429 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
430 | if (data == NULL) { | |
431 | dev_err(dev, "Can not allocate memory\n"); | |
432 | return -ENOMEM; | |
433 | } | |
434 | ||
435 | tpa6130a2_client = client; | |
436 | ||
437 | i2c_set_clientdata(tpa6130a2_client, data); | |
438 | ||
ebab1b1d | 439 | pdata = client->dev.platform_data; |
493b67ef | 440 | data->power_gpio = pdata->power_gpio; |
e5e5b31e | 441 | data->id = pdata->id; |
493b67ef PU |
442 | |
443 | mutex_init(&data->mutex); | |
444 | ||
445 | /* Set default register values */ | |
446 | data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; | |
447 | data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | | |
448 | TPA6130A2_MUTE_L; | |
449 | ||
450 | if (data->power_gpio >= 0) { | |
451 | ret = gpio_request(data->power_gpio, "tpa6130a2 enable"); | |
452 | if (ret < 0) { | |
453 | dev_err(dev, "Failed to request power GPIO (%d)\n", | |
454 | data->power_gpio); | |
7c4e6492 | 455 | goto err_gpio; |
493b67ef PU |
456 | } |
457 | gpio_direction_output(data->power_gpio, 0); | |
493b67ef PU |
458 | } |
459 | ||
e5e5b31e | 460 | switch (data->id) { |
ad8332c1 JN |
461 | default: |
462 | dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", | |
463 | pdata->id); | |
2138301e | 464 | case TPA6130A2: |
ad8332c1 | 465 | regulator = "Vdd"; |
2138301e IK |
466 | break; |
467 | case TPA6140A2: | |
ad8332c1 | 468 | regulator = "AVdd"; |
2138301e | 469 | break; |
2138301e | 470 | } |
7c4e6492 | 471 | |
ad8332c1 JN |
472 | data->supply = regulator_get(dev, regulator); |
473 | if (IS_ERR(data->supply)) { | |
474 | ret = PTR_ERR(data->supply); | |
475 | dev_err(dev, "Failed to request supply: %d\n", ret); | |
7c4e6492 IK |
476 | goto err_regulator; |
477 | } | |
478 | ||
479 | ret = tpa6130a2_power(1); | |
480 | if (ret != 0) | |
481 | goto err_power; | |
482 | ||
493b67ef PU |
483 | |
484 | /* Read version */ | |
485 | ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & | |
486 | TPA6130A2_VERSION_MASK; | |
487 | if ((ret != 1) && (ret != 2)) | |
488 | dev_warn(dev, "UNTESTED version detected (%d)\n", ret); | |
489 | ||
490 | /* Disable the chip */ | |
7c4e6492 IK |
491 | ret = tpa6130a2_power(0); |
492 | if (ret != 0) | |
493 | goto err_power; | |
493b67ef PU |
494 | |
495 | return 0; | |
7c4e6492 IK |
496 | |
497 | err_power: | |
ad8332c1 | 498 | regulator_put(data->supply); |
7c4e6492 IK |
499 | err_regulator: |
500 | if (data->power_gpio >= 0) | |
501 | gpio_free(data->power_gpio); | |
502 | err_gpio: | |
493b67ef PU |
503 | kfree(data); |
504 | i2c_set_clientdata(tpa6130a2_client, NULL); | |
ebab1b1d | 505 | tpa6130a2_client = NULL; |
493b67ef PU |
506 | |
507 | return ret; | |
508 | } | |
509 | ||
735fe4cf | 510 | static int __devexit tpa6130a2_remove(struct i2c_client *client) |
493b67ef PU |
511 | { |
512 | struct tpa6130a2_data *data = i2c_get_clientdata(client); | |
513 | ||
514 | tpa6130a2_power(0); | |
515 | ||
516 | if (data->power_gpio >= 0) | |
517 | gpio_free(data->power_gpio); | |
7c4e6492 | 518 | |
ad8332c1 | 519 | regulator_put(data->supply); |
7c4e6492 | 520 | |
493b67ef | 521 | kfree(data); |
ebab1b1d | 522 | tpa6130a2_client = NULL; |
493b67ef PU |
523 | |
524 | return 0; | |
525 | } | |
526 | ||
527 | static const struct i2c_device_id tpa6130a2_id[] = { | |
528 | { "tpa6130a2", 0 }, | |
529 | { } | |
530 | }; | |
531 | MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); | |
532 | ||
533 | static struct i2c_driver tpa6130a2_i2c_driver = { | |
534 | .driver = { | |
535 | .name = "tpa6130a2", | |
536 | .owner = THIS_MODULE, | |
537 | }, | |
538 | .probe = tpa6130a2_probe, | |
539 | .remove = __devexit_p(tpa6130a2_remove), | |
540 | .id_table = tpa6130a2_id, | |
541 | }; | |
542 | ||
543 | static int __init tpa6130a2_init(void) | |
544 | { | |
545 | return i2c_add_driver(&tpa6130a2_i2c_driver); | |
546 | } | |
547 | ||
548 | static void __exit tpa6130a2_exit(void) | |
549 | { | |
550 | i2c_del_driver(&tpa6130a2_i2c_driver); | |
551 | } | |
552 | ||
553 | MODULE_AUTHOR("Peter Ujfalusi"); | |
554 | MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); | |
555 | MODULE_LICENSE("GPL"); | |
556 | ||
557 | module_init(tpa6130a2_init); | |
558 | module_exit(tpa6130a2_exit); |