Commit | Line | Data |
---|---|---|
f19b2823 MLC |
1 | /* |
2 | * MFD driver for TWL6040 audio device | |
3 | * | |
4 | * Authors: Misael Lopez Cruz <misael.lopez@ti.com> | |
5 | * Jorge Eduardo Candelaria <jorge.candelaria@ti.com> | |
6 | * Peter Ujfalusi <peter.ujfalusi@ti.com> | |
7 | * | |
8 | * Copyright: (C) 2011 Texas Instruments, Inc. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
22 | * 02110-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/gpio.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/i2c/twl.h> | |
34 | #include <linux/mfd/core.h> | |
35 | #include <linux/mfd/twl6040.h> | |
36 | ||
37 | static struct platform_device *twl6040_dev; | |
38 | ||
39 | int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg) | |
40 | { | |
41 | int ret; | |
42 | u8 val = 0; | |
43 | ||
44 | mutex_lock(&twl6040->io_mutex); | |
45 | ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); | |
46 | if (ret < 0) { | |
47 | mutex_unlock(&twl6040->io_mutex); | |
48 | return ret; | |
49 | } | |
50 | mutex_unlock(&twl6040->io_mutex); | |
51 | ||
52 | return val; | |
53 | } | |
54 | EXPORT_SYMBOL(twl6040_reg_read); | |
55 | ||
56 | int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val) | |
57 | { | |
58 | int ret; | |
59 | ||
60 | mutex_lock(&twl6040->io_mutex); | |
61 | ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); | |
62 | mutex_unlock(&twl6040->io_mutex); | |
63 | ||
64 | return ret; | |
65 | } | |
66 | EXPORT_SYMBOL(twl6040_reg_write); | |
67 | ||
68 | int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) | |
69 | { | |
70 | int ret; | |
71 | u8 val; | |
72 | ||
73 | mutex_lock(&twl6040->io_mutex); | |
74 | ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); | |
75 | if (ret) | |
76 | goto out; | |
77 | ||
78 | val |= mask; | |
79 | ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); | |
80 | out: | |
81 | mutex_unlock(&twl6040->io_mutex); | |
82 | return ret; | |
83 | } | |
84 | EXPORT_SYMBOL(twl6040_set_bits); | |
85 | ||
86 | int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) | |
87 | { | |
88 | int ret; | |
89 | u8 val; | |
90 | ||
91 | mutex_lock(&twl6040->io_mutex); | |
92 | ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg); | |
93 | if (ret) | |
94 | goto out; | |
95 | ||
96 | val &= ~mask; | |
97 | ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg); | |
98 | out: | |
99 | mutex_unlock(&twl6040->io_mutex); | |
100 | return ret; | |
101 | } | |
102 | EXPORT_SYMBOL(twl6040_clear_bits); | |
103 | ||
104 | /* twl6040 codec manual power-up sequence */ | |
105 | static int twl6040_power_up(struct twl6040 *twl6040) | |
106 | { | |
107 | u8 ldoctl, ncpctl, lppllctl; | |
108 | int ret; | |
109 | ||
110 | /* enable high-side LDO, reference system and internal oscillator */ | |
111 | ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA; | |
112 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
113 | if (ret) | |
114 | return ret; | |
115 | usleep_range(10000, 10500); | |
116 | ||
117 | /* enable negative charge pump */ | |
118 | ncpctl = TWL6040_NCPENA; | |
119 | ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); | |
120 | if (ret) | |
121 | goto ncp_err; | |
122 | usleep_range(1000, 1500); | |
123 | ||
124 | /* enable low-side LDO */ | |
125 | ldoctl |= TWL6040_LSLDOENA; | |
126 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
127 | if (ret) | |
128 | goto lsldo_err; | |
129 | usleep_range(1000, 1500); | |
130 | ||
131 | /* enable low-power PLL */ | |
132 | lppllctl = TWL6040_LPLLENA; | |
133 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
134 | if (ret) | |
135 | goto lppll_err; | |
136 | usleep_range(5000, 5500); | |
137 | ||
138 | /* disable internal oscillator */ | |
139 | ldoctl &= ~TWL6040_OSCENA; | |
140 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
141 | if (ret) | |
142 | goto osc_err; | |
143 | ||
144 | return 0; | |
145 | ||
146 | osc_err: | |
147 | lppllctl &= ~TWL6040_LPLLENA; | |
148 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
149 | lppll_err: | |
150 | ldoctl &= ~TWL6040_LSLDOENA; | |
151 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
152 | lsldo_err: | |
153 | ncpctl &= ~TWL6040_NCPENA; | |
154 | twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); | |
155 | ncp_err: | |
156 | ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); | |
157 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
162 | /* twl6040 manual power-down sequence */ | |
163 | static void twl6040_power_down(struct twl6040 *twl6040) | |
164 | { | |
165 | u8 ncpctl, ldoctl, lppllctl; | |
166 | ||
167 | ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL); | |
168 | ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL); | |
169 | lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); | |
170 | ||
171 | /* enable internal oscillator */ | |
172 | ldoctl |= TWL6040_OSCENA; | |
173 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
174 | usleep_range(1000, 1500); | |
175 | ||
176 | /* disable low-power PLL */ | |
177 | lppllctl &= ~TWL6040_LPLLENA; | |
178 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
179 | ||
180 | /* disable low-side LDO */ | |
181 | ldoctl &= ~TWL6040_LSLDOENA; | |
182 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
183 | ||
184 | /* disable negative charge pump */ | |
185 | ncpctl &= ~TWL6040_NCPENA; | |
186 | twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); | |
187 | ||
188 | /* disable high-side LDO, reference system and internal oscillator */ | |
189 | ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); | |
190 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); | |
191 | } | |
192 | ||
193 | static irqreturn_t twl6040_naudint_handler(int irq, void *data) | |
194 | { | |
195 | struct twl6040 *twl6040 = data; | |
196 | u8 intid, status; | |
197 | ||
198 | intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); | |
199 | ||
200 | if (intid & TWL6040_READYINT) | |
201 | complete(&twl6040->ready); | |
202 | ||
203 | if (intid & TWL6040_THINT) { | |
204 | status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); | |
205 | if (status & TWL6040_TSHUTDET) { | |
206 | dev_warn(&twl6040_dev->dev, | |
207 | "Thermal shutdown, powering-off"); | |
208 | twl6040_power(twl6040, 0); | |
209 | } else { | |
210 | dev_warn(&twl6040_dev->dev, | |
211 | "Leaving thermal shutdown, powering-on"); | |
212 | twl6040_power(twl6040, 1); | |
213 | } | |
214 | } | |
215 | ||
216 | return IRQ_HANDLED; | |
217 | } | |
218 | ||
219 | static int twl6040_power_up_completion(struct twl6040 *twl6040, | |
220 | int naudint) | |
221 | { | |
222 | int time_left; | |
223 | u8 intid; | |
224 | ||
225 | time_left = wait_for_completion_timeout(&twl6040->ready, | |
226 | msecs_to_jiffies(144)); | |
227 | if (!time_left) { | |
228 | intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); | |
229 | if (!(intid & TWL6040_READYINT)) { | |
230 | dev_err(&twl6040_dev->dev, | |
231 | "timeout waiting for READYINT\n"); | |
232 | return -ETIMEDOUT; | |
233 | } | |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | int twl6040_power(struct twl6040 *twl6040, int on) | |
240 | { | |
241 | int audpwron = twl6040->audpwron; | |
242 | int naudint = twl6040->irq; | |
243 | int ret = 0; | |
244 | ||
245 | mutex_lock(&twl6040->mutex); | |
246 | ||
247 | if (on) { | |
248 | /* already powered-up */ | |
249 | if (twl6040->power_count++) | |
250 | goto out; | |
251 | ||
252 | if (gpio_is_valid(audpwron)) { | |
253 | /* use AUDPWRON line */ | |
254 | gpio_set_value(audpwron, 1); | |
255 | /* wait for power-up completion */ | |
256 | ret = twl6040_power_up_completion(twl6040, naudint); | |
257 | if (ret) { | |
258 | dev_err(&twl6040_dev->dev, | |
259 | "automatic power-down failed\n"); | |
260 | twl6040->power_count = 0; | |
261 | goto out; | |
262 | } | |
263 | } else { | |
264 | /* use manual power-up sequence */ | |
265 | ret = twl6040_power_up(twl6040); | |
266 | if (ret) { | |
267 | dev_err(&twl6040_dev->dev, | |
268 | "manual power-up failed\n"); | |
269 | twl6040->power_count = 0; | |
270 | goto out; | |
271 | } | |
272 | } | |
273 | twl6040->pll = TWL6040_LPPLL_ID; | |
274 | twl6040->sysclk = 19200000; | |
275 | } else { | |
276 | /* already powered-down */ | |
277 | if (!twl6040->power_count) { | |
278 | dev_err(&twl6040_dev->dev, | |
279 | "device is already powered-off\n"); | |
280 | ret = -EPERM; | |
281 | goto out; | |
282 | } | |
283 | ||
284 | if (--twl6040->power_count) | |
285 | goto out; | |
286 | ||
287 | if (gpio_is_valid(audpwron)) { | |
288 | /* use AUDPWRON line */ | |
289 | gpio_set_value(audpwron, 0); | |
290 | ||
291 | /* power-down sequence latency */ | |
292 | usleep_range(500, 700); | |
293 | } else { | |
294 | /* use manual power-down sequence */ | |
295 | twl6040_power_down(twl6040); | |
296 | } | |
297 | twl6040->pll = TWL6040_NOPLL_ID; | |
298 | twl6040->sysclk = 0; | |
299 | } | |
300 | ||
301 | out: | |
302 | mutex_unlock(&twl6040->mutex); | |
303 | return ret; | |
304 | } | |
305 | EXPORT_SYMBOL(twl6040_power); | |
306 | ||
307 | int twl6040_set_pll(struct twl6040 *twl6040, enum twl6040_pll_id id, | |
308 | unsigned int freq_in, unsigned int freq_out) | |
309 | { | |
310 | u8 hppllctl, lppllctl; | |
311 | int ret = 0; | |
312 | ||
313 | mutex_lock(&twl6040->mutex); | |
314 | ||
315 | hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL); | |
316 | lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); | |
317 | ||
318 | switch (id) { | |
319 | case TWL6040_LPPLL_ID: | |
320 | /* low-power PLL divider */ | |
321 | switch (freq_out) { | |
322 | case 17640000: | |
323 | lppllctl |= TWL6040_LPLLFIN; | |
324 | break; | |
325 | case 19200000: | |
326 | lppllctl &= ~TWL6040_LPLLFIN; | |
327 | break; | |
328 | default: | |
329 | dev_err(&twl6040_dev->dev, | |
330 | "freq_out %d not supported\n", freq_out); | |
331 | ret = -EINVAL; | |
332 | goto pll_out; | |
333 | } | |
334 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
335 | ||
336 | switch (freq_in) { | |
337 | case 32768: | |
338 | lppllctl |= TWL6040_LPLLENA; | |
339 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, | |
340 | lppllctl); | |
341 | mdelay(5); | |
342 | lppllctl &= ~TWL6040_HPLLSEL; | |
343 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, | |
344 | lppllctl); | |
345 | hppllctl &= ~TWL6040_HPLLENA; | |
346 | twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, | |
347 | hppllctl); | |
348 | break; | |
349 | default: | |
350 | dev_err(&twl6040_dev->dev, | |
351 | "freq_in %d not supported\n", freq_in); | |
352 | ret = -EINVAL; | |
353 | goto pll_out; | |
354 | } | |
355 | ||
356 | twl6040->pll = TWL6040_LPPLL_ID; | |
357 | break; | |
358 | case TWL6040_HPPLL_ID: | |
359 | /* high-performance PLL can provide only 19.2 MHz */ | |
360 | if (freq_out != 19200000) { | |
361 | dev_err(&twl6040_dev->dev, | |
362 | "freq_out %d not supported\n", freq_out); | |
363 | ret = -EINVAL; | |
364 | goto pll_out; | |
365 | } | |
366 | ||
367 | hppllctl &= ~TWL6040_MCLK_MSK; | |
368 | ||
369 | switch (freq_in) { | |
370 | case 12000000: | |
371 | /* PLL enabled, active mode */ | |
372 | hppllctl |= TWL6040_MCLK_12000KHZ | | |
373 | TWL6040_HPLLENA; | |
374 | break; | |
375 | case 19200000: | |
376 | /* | |
377 | * PLL disabled | |
378 | * (enable PLL if MCLK jitter quality | |
379 | * doesn't meet specification) | |
380 | */ | |
381 | hppllctl |= TWL6040_MCLK_19200KHZ; | |
382 | break; | |
383 | case 26000000: | |
384 | /* PLL enabled, active mode */ | |
385 | hppllctl |= TWL6040_MCLK_26000KHZ | | |
386 | TWL6040_HPLLENA; | |
387 | break; | |
388 | case 38400000: | |
389 | /* PLL enabled, active mode */ | |
390 | hppllctl |= TWL6040_MCLK_38400KHZ | | |
391 | TWL6040_HPLLENA; | |
392 | break; | |
393 | default: | |
394 | dev_err(&twl6040_dev->dev, | |
395 | "freq_in %d not supported\n", freq_in); | |
396 | ret = -EINVAL; | |
397 | goto pll_out; | |
398 | } | |
399 | ||
400 | /* enable clock slicer to ensure input waveform is square */ | |
401 | hppllctl |= TWL6040_HPLLSQRENA; | |
402 | ||
403 | twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl); | |
404 | usleep_range(500, 700); | |
405 | lppllctl |= TWL6040_HPLLSEL; | |
406 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
407 | lppllctl &= ~TWL6040_LPLLENA; | |
408 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); | |
409 | ||
410 | twl6040->pll = TWL6040_HPPLL_ID; | |
411 | break; | |
412 | default: | |
413 | dev_err(&twl6040_dev->dev, "unknown pll id %d\n", id); | |
414 | ret = -EINVAL; | |
415 | goto pll_out; | |
416 | } | |
417 | ||
418 | twl6040->sysclk = freq_out; | |
419 | ||
420 | pll_out: | |
421 | mutex_unlock(&twl6040->mutex); | |
422 | return ret; | |
423 | } | |
424 | EXPORT_SYMBOL(twl6040_set_pll); | |
425 | ||
426 | enum twl6040_pll_id twl6040_get_pll(struct twl6040 *twl6040) | |
427 | { | |
428 | return twl6040->pll; | |
429 | } | |
430 | EXPORT_SYMBOL(twl6040_get_pll); | |
431 | ||
432 | unsigned int twl6040_get_sysclk(struct twl6040 *twl6040) | |
433 | { | |
434 | return twl6040->sysclk; | |
435 | } | |
436 | EXPORT_SYMBOL(twl6040_get_sysclk); | |
437 | ||
438 | static int __devinit twl6040_probe(struct platform_device *pdev) | |
439 | { | |
440 | struct twl4030_audio_data *pdata = pdev->dev.platform_data; | |
441 | struct twl6040 *twl6040; | |
442 | struct mfd_cell *cell = NULL; | |
443 | int ret, children = 0; | |
444 | ||
445 | if (!pdata) { | |
446 | dev_err(&pdev->dev, "Platform data is missing\n"); | |
447 | return -EINVAL; | |
448 | } | |
449 | ||
450 | twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL); | |
451 | if (!twl6040) | |
452 | return -ENOMEM; | |
453 | ||
454 | platform_set_drvdata(pdev, twl6040); | |
455 | ||
456 | twl6040_dev = pdev; | |
457 | twl6040->dev = &pdev->dev; | |
458 | twl6040->audpwron = pdata->audpwron_gpio; | |
459 | twl6040->irq = pdata->naudint_irq; | |
460 | twl6040->irq_base = pdata->irq_base; | |
461 | ||
462 | mutex_init(&twl6040->mutex); | |
463 | mutex_init(&twl6040->io_mutex); | |
464 | init_completion(&twl6040->ready); | |
465 | ||
466 | twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); | |
467 | ||
468 | if (gpio_is_valid(twl6040->audpwron)) { | |
469 | ret = gpio_request(twl6040->audpwron, "audpwron"); | |
470 | if (ret) | |
471 | goto gpio1_err; | |
472 | ||
473 | ret = gpio_direction_output(twl6040->audpwron, 0); | |
474 | if (ret) | |
475 | goto gpio2_err; | |
476 | } | |
477 | ||
478 | /* ERRATA: Automatic power-up is not possible in ES1.0 */ | |
479 | if (twl6040->rev == TWL6040_REV_ES1_0) | |
480 | twl6040->audpwron = -EINVAL; | |
481 | ||
482 | if (twl6040->irq) { | |
483 | /* codec interrupt */ | |
484 | ret = twl6040_irq_init(twl6040); | |
485 | if (ret) | |
486 | goto gpio2_err; | |
487 | ||
488 | ret = twl6040_request_irq(twl6040, TWL6040_IRQ_READY, | |
489 | twl6040_naudint_handler, 0, | |
490 | "twl6040_irq_ready", twl6040); | |
491 | if (ret) { | |
492 | dev_err(twl6040->dev, "READY IRQ request failed: %d\n", | |
493 | ret); | |
494 | goto irq_err; | |
495 | } | |
496 | } | |
497 | ||
498 | /* dual-access registers controlled by I2C only */ | |
499 | twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL); | |
500 | ||
501 | if (pdata->codec) { | |
502 | cell = &twl6040->cells[children]; | |
503 | cell->name = "twl6040-codec"; | |
6c448637 PU |
504 | cell->platform_data = pdata->codec; |
505 | cell->pdata_size = sizeof(*pdata->codec); | |
f19b2823 MLC |
506 | children++; |
507 | } | |
508 | ||
509 | if (pdata->vibra) { | |
510 | cell = &twl6040->cells[children]; | |
511 | cell->name = "twl6040-vibra"; | |
512 | cell->platform_data = pdata->vibra; | |
513 | cell->pdata_size = sizeof(*pdata->vibra); | |
514 | children++; | |
515 | } | |
516 | ||
517 | if (children) { | |
518 | ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells, | |
519 | children, NULL, 0); | |
520 | if (ret) | |
521 | goto mfd_err; | |
522 | } else { | |
523 | dev_err(&pdev->dev, "No platform data found for children\n"); | |
524 | ret = -ENODEV; | |
525 | goto mfd_err; | |
526 | } | |
527 | ||
528 | return 0; | |
529 | ||
530 | mfd_err: | |
531 | if (twl6040->irq) | |
532 | twl6040_free_irq(twl6040, TWL6040_IRQ_READY, twl6040); | |
533 | irq_err: | |
534 | if (twl6040->irq) | |
535 | twl6040_irq_exit(twl6040); | |
536 | gpio2_err: | |
537 | if (gpio_is_valid(twl6040->audpwron)) | |
538 | gpio_free(twl6040->audpwron); | |
539 | gpio1_err: | |
540 | platform_set_drvdata(pdev, NULL); | |
541 | kfree(twl6040); | |
542 | twl6040_dev = NULL; | |
543 | return ret; | |
544 | } | |
545 | ||
546 | static int __devexit twl6040_remove(struct platform_device *pdev) | |
547 | { | |
548 | struct twl6040 *twl6040 = platform_get_drvdata(pdev); | |
549 | ||
550 | if (twl6040->power_count) | |
551 | twl6040_power(twl6040, 0); | |
552 | ||
553 | if (gpio_is_valid(twl6040->audpwron)) | |
554 | gpio_free(twl6040->audpwron); | |
555 | ||
556 | twl6040_free_irq(twl6040, TWL6040_IRQ_READY, twl6040); | |
557 | ||
558 | if (twl6040->irq) | |
559 | twl6040_irq_exit(twl6040); | |
560 | ||
561 | mfd_remove_devices(&pdev->dev); | |
562 | platform_set_drvdata(pdev, NULL); | |
563 | kfree(twl6040); | |
564 | twl6040_dev = NULL; | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static struct platform_driver twl6040_driver = { | |
570 | .probe = twl6040_probe, | |
571 | .remove = __devexit_p(twl6040_remove), | |
572 | .driver = { | |
573 | .owner = THIS_MODULE, | |
574 | .name = "twl6040", | |
575 | }, | |
576 | }; | |
577 | ||
578 | static int __devinit twl6040_init(void) | |
579 | { | |
580 | return platform_driver_register(&twl6040_driver); | |
581 | } | |
582 | module_init(twl6040_init); | |
583 | ||
584 | static void __devexit twl6040_exit(void) | |
585 | { | |
586 | platform_driver_unregister(&twl6040_driver); | |
587 | } | |
588 | ||
589 | module_exit(twl6040_exit); | |
590 | ||
591 | MODULE_DESCRIPTION("TWL6040 MFD"); | |
592 | MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); | |
593 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); | |
594 | MODULE_LICENSE("GPL"); | |
595 | MODULE_ALIAS("platform:twl6040"); |