Merge tag 'mfd-for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo...
[~shefty/rdma-dev.git] / drivers / mfd / twl6040-core.c
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.h>
34 #include <linux/regmap.h>
35 #include <linux/err.h>
36 #include <linux/mfd/core.h>
37 #include <linux/mfd/twl6040.h>
38
39 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
40
41 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
42 {
43         int ret;
44         unsigned int val;
45
46         mutex_lock(&twl6040->io_mutex);
47         /* Vibra control registers from cache */
48         if (unlikely(reg == TWL6040_REG_VIBCTLL ||
49                      reg == TWL6040_REG_VIBCTLR)) {
50                 val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
51         } else {
52                 ret = regmap_read(twl6040->regmap, reg, &val);
53                 if (ret < 0) {
54                         mutex_unlock(&twl6040->io_mutex);
55                         return ret;
56                 }
57         }
58         mutex_unlock(&twl6040->io_mutex);
59
60         return val;
61 }
62 EXPORT_SYMBOL(twl6040_reg_read);
63
64 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
65 {
66         int ret;
67
68         mutex_lock(&twl6040->io_mutex);
69         ret = regmap_write(twl6040->regmap, reg, val);
70         /* Cache the vibra control registers */
71         if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
72                 twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
73         mutex_unlock(&twl6040->io_mutex);
74
75         return ret;
76 }
77 EXPORT_SYMBOL(twl6040_reg_write);
78
79 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
80 {
81         int ret;
82
83         mutex_lock(&twl6040->io_mutex);
84         ret = regmap_update_bits(twl6040->regmap, reg, mask, mask);
85         mutex_unlock(&twl6040->io_mutex);
86         return ret;
87 }
88 EXPORT_SYMBOL(twl6040_set_bits);
89
90 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
91 {
92         int ret;
93
94         mutex_lock(&twl6040->io_mutex);
95         ret = regmap_update_bits(twl6040->regmap, reg, mask, 0);
96         mutex_unlock(&twl6040->io_mutex);
97         return ret;
98 }
99 EXPORT_SYMBOL(twl6040_clear_bits);
100
101 /* twl6040 codec manual power-up sequence */
102 static int twl6040_power_up(struct twl6040 *twl6040)
103 {
104         u8 ldoctl, ncpctl, lppllctl;
105         int ret;
106
107         /* enable high-side LDO, reference system and internal oscillator */
108         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
109         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
110         if (ret)
111                 return ret;
112         usleep_range(10000, 10500);
113
114         /* enable negative charge pump */
115         ncpctl = TWL6040_NCPENA;
116         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
117         if (ret)
118                 goto ncp_err;
119         usleep_range(1000, 1500);
120
121         /* enable low-side LDO */
122         ldoctl |= TWL6040_LSLDOENA;
123         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
124         if (ret)
125                 goto lsldo_err;
126         usleep_range(1000, 1500);
127
128         /* enable low-power PLL */
129         lppllctl = TWL6040_LPLLENA;
130         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
131         if (ret)
132                 goto lppll_err;
133         usleep_range(5000, 5500);
134
135         /* disable internal oscillator */
136         ldoctl &= ~TWL6040_OSCENA;
137         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
138         if (ret)
139                 goto osc_err;
140
141         return 0;
142
143 osc_err:
144         lppllctl &= ~TWL6040_LPLLENA;
145         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
146 lppll_err:
147         ldoctl &= ~TWL6040_LSLDOENA;
148         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
149 lsldo_err:
150         ncpctl &= ~TWL6040_NCPENA;
151         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
152 ncp_err:
153         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
154         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
155
156         return ret;
157 }
158
159 /* twl6040 manual power-down sequence */
160 static void twl6040_power_down(struct twl6040 *twl6040)
161 {
162         u8 ncpctl, ldoctl, lppllctl;
163
164         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
165         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
166         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
167
168         /* enable internal oscillator */
169         ldoctl |= TWL6040_OSCENA;
170         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
171         usleep_range(1000, 1500);
172
173         /* disable low-power PLL */
174         lppllctl &= ~TWL6040_LPLLENA;
175         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
176
177         /* disable low-side LDO */
178         ldoctl &= ~TWL6040_LSLDOENA;
179         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
180
181         /* disable negative charge pump */
182         ncpctl &= ~TWL6040_NCPENA;
183         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
184
185         /* disable high-side LDO, reference system and internal oscillator */
186         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
187         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
188 }
189
190 static irqreturn_t twl6040_naudint_handler(int irq, void *data)
191 {
192         struct twl6040 *twl6040 = data;
193         u8 intid, status;
194
195         intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
196
197         if (intid & TWL6040_READYINT)
198                 complete(&twl6040->ready);
199
200         if (intid & TWL6040_THINT) {
201                 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
202                 if (status & TWL6040_TSHUTDET) {
203                         dev_warn(twl6040->dev,
204                                  "Thermal shutdown, powering-off");
205                         twl6040_power(twl6040, 0);
206                 } else {
207                         dev_warn(twl6040->dev,
208                                  "Leaving thermal shutdown, powering-on");
209                         twl6040_power(twl6040, 1);
210                 }
211         }
212
213         return IRQ_HANDLED;
214 }
215
216 static int twl6040_power_up_completion(struct twl6040 *twl6040,
217                                        int naudint)
218 {
219         int time_left;
220         u8 intid;
221
222         time_left = wait_for_completion_timeout(&twl6040->ready,
223                                                 msecs_to_jiffies(144));
224         if (!time_left) {
225                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
226                 if (!(intid & TWL6040_READYINT)) {
227                         dev_err(twl6040->dev,
228                                 "timeout waiting for READYINT\n");
229                         return -ETIMEDOUT;
230                 }
231         }
232
233         return 0;
234 }
235
236 int twl6040_power(struct twl6040 *twl6040, int on)
237 {
238         int audpwron = twl6040->audpwron;
239         int naudint = twl6040->irq;
240         int ret = 0;
241
242         mutex_lock(&twl6040->mutex);
243
244         if (on) {
245                 /* already powered-up */
246                 if (twl6040->power_count++)
247                         goto out;
248
249                 if (gpio_is_valid(audpwron)) {
250                         /* use AUDPWRON line */
251                         gpio_set_value(audpwron, 1);
252                         /* wait for power-up completion */
253                         ret = twl6040_power_up_completion(twl6040, naudint);
254                         if (ret) {
255                                 dev_err(twl6040->dev,
256                                         "automatic power-down failed\n");
257                                 twl6040->power_count = 0;
258                                 goto out;
259                         }
260                 } else {
261                         /* use manual power-up sequence */
262                         ret = twl6040_power_up(twl6040);
263                         if (ret) {
264                                 dev_err(twl6040->dev,
265                                         "manual power-up failed\n");
266                                 twl6040->power_count = 0;
267                                 goto out;
268                         }
269                 }
270                 /* Default PLL configuration after power up */
271                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
272                 twl6040->sysclk = 19200000;
273                 twl6040->mclk = 32768;
274         } else {
275                 /* already powered-down */
276                 if (!twl6040->power_count) {
277                         dev_err(twl6040->dev,
278                                 "device is already powered-off\n");
279                         ret = -EPERM;
280                         goto out;
281                 }
282
283                 if (--twl6040->power_count)
284                         goto out;
285
286                 if (gpio_is_valid(audpwron)) {
287                         /* use AUDPWRON line */
288                         gpio_set_value(audpwron, 0);
289
290                         /* power-down sequence latency */
291                         usleep_range(500, 700);
292                 } else {
293                         /* use manual power-down sequence */
294                         twl6040_power_down(twl6040);
295                 }
296                 twl6040->sysclk = 0;
297                 twl6040->mclk = 0;
298         }
299
300 out:
301         mutex_unlock(&twl6040->mutex);
302         return ret;
303 }
304 EXPORT_SYMBOL(twl6040_power);
305
306 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
307                     unsigned int freq_in, unsigned int freq_out)
308 {
309         u8 hppllctl, lppllctl;
310         int ret = 0;
311
312         mutex_lock(&twl6040->mutex);
313
314         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
315         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
316
317         /* Force full reconfiguration when switching between PLL */
318         if (pll_id != twl6040->pll) {
319                 twl6040->sysclk = 0;
320                 twl6040->mclk = 0;
321         }
322
323         switch (pll_id) {
324         case TWL6040_SYSCLK_SEL_LPPLL:
325                 /* low-power PLL divider */
326                 /* Change the sysclk configuration only if it has been canged */
327                 if (twl6040->sysclk != freq_out) {
328                         switch (freq_out) {
329                         case 17640000:
330                                 lppllctl |= TWL6040_LPLLFIN;
331                                 break;
332                         case 19200000:
333                                 lppllctl &= ~TWL6040_LPLLFIN;
334                                 break;
335                         default:
336                                 dev_err(twl6040->dev,
337                                         "freq_out %d not supported\n",
338                                         freq_out);
339                                 ret = -EINVAL;
340                                 goto pll_out;
341                         }
342                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
343                                           lppllctl);
344                 }
345
346                 /* The PLL in use has not been change, we can exit */
347                 if (twl6040->pll == pll_id)
348                         break;
349
350                 switch (freq_in) {
351                 case 32768:
352                         lppllctl |= TWL6040_LPLLENA;
353                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
354                                           lppllctl);
355                         mdelay(5);
356                         lppllctl &= ~TWL6040_HPLLSEL;
357                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
358                                           lppllctl);
359                         hppllctl &= ~TWL6040_HPLLENA;
360                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
361                                           hppllctl);
362                         break;
363                 default:
364                         dev_err(twl6040->dev,
365                                 "freq_in %d not supported\n", freq_in);
366                         ret = -EINVAL;
367                         goto pll_out;
368                 }
369                 break;
370         case TWL6040_SYSCLK_SEL_HPPLL:
371                 /* high-performance PLL can provide only 19.2 MHz */
372                 if (freq_out != 19200000) {
373                         dev_err(twl6040->dev,
374                                 "freq_out %d not supported\n", freq_out);
375                         ret = -EINVAL;
376                         goto pll_out;
377                 }
378
379                 if (twl6040->mclk != freq_in) {
380                         hppllctl &= ~TWL6040_MCLK_MSK;
381
382                         switch (freq_in) {
383                         case 12000000:
384                                 /* PLL enabled, active mode */
385                                 hppllctl |= TWL6040_MCLK_12000KHZ |
386                                             TWL6040_HPLLENA;
387                                 break;
388                         case 19200000:
389                                 /*
390                                 * PLL disabled
391                                 * (enable PLL if MCLK jitter quality
392                                 *  doesn't meet specification)
393                                 */
394                                 hppllctl |= TWL6040_MCLK_19200KHZ;
395                                 break;
396                         case 26000000:
397                                 /* PLL enabled, active mode */
398                                 hppllctl |= TWL6040_MCLK_26000KHZ |
399                                             TWL6040_HPLLENA;
400                                 break;
401                         case 38400000:
402                                 /* PLL enabled, active mode */
403                                 hppllctl |= TWL6040_MCLK_38400KHZ |
404                                             TWL6040_HPLLENA;
405                                 break;
406                         default:
407                                 dev_err(twl6040->dev,
408                                         "freq_in %d not supported\n", freq_in);
409                                 ret = -EINVAL;
410                                 goto pll_out;
411                         }
412
413                         /*
414                          * enable clock slicer to ensure input waveform is
415                          * square
416                          */
417                         hppllctl |= TWL6040_HPLLSQRENA;
418
419                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
420                                           hppllctl);
421                         usleep_range(500, 700);
422                         lppllctl |= TWL6040_HPLLSEL;
423                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
424                                           lppllctl);
425                         lppllctl &= ~TWL6040_LPLLENA;
426                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
427                                           lppllctl);
428                 }
429                 break;
430         default:
431                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
432                 ret = -EINVAL;
433                 goto pll_out;
434         }
435
436         twl6040->sysclk = freq_out;
437         twl6040->mclk = freq_in;
438         twl6040->pll = pll_id;
439
440 pll_out:
441         mutex_unlock(&twl6040->mutex);
442         return ret;
443 }
444 EXPORT_SYMBOL(twl6040_set_pll);
445
446 int twl6040_get_pll(struct twl6040 *twl6040)
447 {
448         if (twl6040->power_count)
449                 return twl6040->pll;
450         else
451                 return -ENODEV;
452 }
453 EXPORT_SYMBOL(twl6040_get_pll);
454
455 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
456 {
457         return twl6040->sysclk;
458 }
459 EXPORT_SYMBOL(twl6040_get_sysclk);
460
461 /* Get the combined status of the vibra control register */
462 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
463 {
464         u8 status;
465
466         status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
467         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
468
469         return status;
470 }
471 EXPORT_SYMBOL(twl6040_get_vibralr_status);
472
473 static struct resource twl6040_vibra_rsrc[] = {
474         {
475                 .flags = IORESOURCE_IRQ,
476         },
477 };
478
479 static struct resource twl6040_codec_rsrc[] = {
480         {
481                 .flags = IORESOURCE_IRQ,
482         },
483 };
484
485 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
486 {
487         /* Register 0 is not readable */
488         if (!reg)
489                 return false;
490         return true;
491 }
492
493 static struct regmap_config twl6040_regmap_config = {
494         .reg_bits = 8,
495         .val_bits = 8,
496         .max_register = TWL6040_REG_STATUS, /* 0x2e */
497
498         .readable_reg = twl6040_readable_reg,
499 };
500
501 static int __devinit twl6040_probe(struct i2c_client *client,
502                                      const struct i2c_device_id *id)
503 {
504         struct twl6040_platform_data *pdata = client->dev.platform_data;
505         struct twl6040 *twl6040;
506         struct mfd_cell *cell = NULL;
507         int ret, children = 0;
508
509         if (!pdata) {
510                 dev_err(&client->dev, "Platform data is missing\n");
511                 return -EINVAL;
512         }
513
514         /* In order to operate correctly we need valid interrupt config */
515         if (!client->irq || !pdata->irq_base) {
516                 dev_err(&client->dev, "Invalid IRQ configuration\n");
517                 return -EINVAL;
518         }
519
520         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
521                                GFP_KERNEL);
522         if (!twl6040) {
523                 ret = -ENOMEM;
524                 goto err;
525         }
526
527         twl6040->regmap = regmap_init_i2c(client, &twl6040_regmap_config);
528         if (IS_ERR(twl6040->regmap)) {
529                 ret = PTR_ERR(twl6040->regmap);
530                 goto err;
531         }
532
533         i2c_set_clientdata(client, twl6040);
534
535         twl6040->dev = &client->dev;
536         twl6040->irq = client->irq;
537         twl6040->irq_base = pdata->irq_base;
538
539         mutex_init(&twl6040->mutex);
540         mutex_init(&twl6040->io_mutex);
541         init_completion(&twl6040->ready);
542
543         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
544
545         /* ERRATA: Automatic power-up is not possible in ES1.0 */
546         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
547                 twl6040->audpwron = pdata->audpwron_gpio;
548         else
549                 twl6040->audpwron = -EINVAL;
550
551         if (gpio_is_valid(twl6040->audpwron)) {
552                 ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
553                                        "audpwron");
554                 if (ret)
555                         goto gpio1_err;
556         }
557
558         /* codec interrupt */
559         ret = twl6040_irq_init(twl6040);
560         if (ret)
561                 goto gpio2_err;
562
563         ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
564                                    NULL, twl6040_naudint_handler, 0,
565                                    "twl6040_irq_ready", twl6040);
566         if (ret) {
567                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
568                         ret);
569                 goto irq_err;
570         }
571
572         /* dual-access registers controlled by I2C only */
573         twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
574
575         if (pdata->codec) {
576                 int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
577
578                 cell = &twl6040->cells[children];
579                 cell->name = "twl6040-codec";
580                 twl6040_codec_rsrc[0].start = irq;
581                 twl6040_codec_rsrc[0].end = irq;
582                 cell->resources = twl6040_codec_rsrc;
583                 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
584                 cell->platform_data = pdata->codec;
585                 cell->pdata_size = sizeof(*pdata->codec);
586                 children++;
587         }
588
589         if (pdata->vibra) {
590                 int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
591
592                 cell = &twl6040->cells[children];
593                 cell->name = "twl6040-vibra";
594                 twl6040_vibra_rsrc[0].start = irq;
595                 twl6040_vibra_rsrc[0].end = irq;
596                 cell->resources = twl6040_vibra_rsrc;
597                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
598
599                 cell->platform_data = pdata->vibra;
600                 cell->pdata_size = sizeof(*pdata->vibra);
601                 children++;
602         }
603
604         if (children) {
605                 ret = mfd_add_devices(&client->dev, -1, twl6040->cells,
606                                       children, NULL, 0);
607                 if (ret)
608                         goto mfd_err;
609         } else {
610                 dev_err(&client->dev, "No platform data found for children\n");
611                 ret = -ENODEV;
612                 goto mfd_err;
613         }
614
615         return 0;
616
617 mfd_err:
618         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
619 irq_err:
620         twl6040_irq_exit(twl6040);
621 gpio2_err:
622         if (gpio_is_valid(twl6040->audpwron))
623                 gpio_free(twl6040->audpwron);
624 gpio1_err:
625         i2c_set_clientdata(client, NULL);
626         regmap_exit(twl6040->regmap);
627 err:
628         return ret;
629 }
630
631 static int __devexit twl6040_remove(struct i2c_client *client)
632 {
633         struct twl6040 *twl6040 = i2c_get_clientdata(client);
634
635         if (twl6040->power_count)
636                 twl6040_power(twl6040, 0);
637
638         if (gpio_is_valid(twl6040->audpwron))
639                 gpio_free(twl6040->audpwron);
640
641         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
642         twl6040_irq_exit(twl6040);
643
644         mfd_remove_devices(&client->dev);
645         i2c_set_clientdata(client, NULL);
646         regmap_exit(twl6040->regmap);
647
648         return 0;
649 }
650
651 static const struct i2c_device_id twl6040_i2c_id[] = {
652         { "twl6040", 0, },
653         { },
654 };
655 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
656
657 static struct i2c_driver twl6040_driver = {
658         .driver = {
659                 .name = "twl6040",
660                 .owner = THIS_MODULE,
661         },
662         .probe          = twl6040_probe,
663         .remove         = __devexit_p(twl6040_remove),
664         .id_table       = twl6040_i2c_id,
665 };
666
667 module_i2c_driver(twl6040_driver);
668
669 MODULE_DESCRIPTION("TWL6040 MFD");
670 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
671 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
672 MODULE_LICENSE("GPL");
673 MODULE_ALIAS("platform:twl6040");