Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs...
[pandora-kernel.git] / drivers / input / misc / bma150.c
1 /*
2  * Copyright (c) 2011 Bosch Sensortec GmbH
3  * Copyright (c) 2011 Unixphere
4  *
5  * This driver adds support for Bosch Sensortec's digital acceleration
6  * sensors BMA150 and SMB380.
7  * The SMB380 is fully compatible with BMA150 and only differs in packaging.
8  *
9  * The datasheet for the BMA150 chip can be found here:
10  * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/i2c.h>
29 #include <linux/input.h>
30 #include <linux/input-polldev.h>
31 #include <linux/interrupt.h>
32 #include <linux/delay.h>
33 #include <linux/slab.h>
34 #include <linux/pm.h>
35 #include <linux/pm_runtime.h>
36 #include <linux/bma150.h>
37
38 #define ABSMAX_ACC_VAL          0x01FF
39 #define ABSMIN_ACC_VAL          -(ABSMAX_ACC_VAL)
40
41 /* Each axis is represented by a 2-byte data word */
42 #define BMA150_XYZ_DATA_SIZE    6
43
44 /* Input poll interval in milliseconds */
45 #define BMA150_POLL_INTERVAL    10
46 #define BMA150_POLL_MAX         200
47 #define BMA150_POLL_MIN         0
48
49 #define BMA150_BW_25HZ          0
50 #define BMA150_BW_50HZ          1
51 #define BMA150_BW_100HZ         2
52 #define BMA150_BW_190HZ         3
53 #define BMA150_BW_375HZ         4
54 #define BMA150_BW_750HZ         5
55 #define BMA150_BW_1500HZ        6
56
57 #define BMA150_RANGE_2G         0
58 #define BMA150_RANGE_4G         1
59 #define BMA150_RANGE_8G         2
60
61 #define BMA150_MODE_NORMAL      0
62 #define BMA150_MODE_SLEEP       2
63 #define BMA150_MODE_WAKE_UP     3
64
65 /* Data register addresses */
66 #define BMA150_DATA_0_REG       0x00
67 #define BMA150_DATA_1_REG       0x01
68 #define BMA150_DATA_2_REG       0x02
69
70 /* Control register addresses */
71 #define BMA150_CTRL_0_REG       0x0A
72 #define BMA150_CTRL_1_REG       0x0B
73 #define BMA150_CTRL_2_REG       0x14
74 #define BMA150_CTRL_3_REG       0x15
75
76 /* Configuration/Setting register addresses */
77 #define BMA150_CFG_0_REG        0x0C
78 #define BMA150_CFG_1_REG        0x0D
79 #define BMA150_CFG_2_REG        0x0E
80 #define BMA150_CFG_3_REG        0x0F
81 #define BMA150_CFG_4_REG        0x10
82 #define BMA150_CFG_5_REG        0x11
83
84 #define BMA150_CHIP_ID          2
85 #define BMA150_CHIP_ID_REG      BMA150_DATA_0_REG
86
87 #define BMA150_ACC_X_LSB_REG    BMA150_DATA_2_REG
88
89 #define BMA150_SLEEP_POS        0
90 #define BMA150_SLEEP_MSK        0x01
91 #define BMA150_SLEEP_REG        BMA150_CTRL_0_REG
92
93 #define BMA150_BANDWIDTH_POS    0
94 #define BMA150_BANDWIDTH_MSK    0x07
95 #define BMA150_BANDWIDTH_REG    BMA150_CTRL_2_REG
96
97 #define BMA150_RANGE_POS        3
98 #define BMA150_RANGE_MSK        0x18
99 #define BMA150_RANGE_REG        BMA150_CTRL_2_REG
100
101 #define BMA150_WAKE_UP_POS      0
102 #define BMA150_WAKE_UP_MSK      0x01
103 #define BMA150_WAKE_UP_REG      BMA150_CTRL_3_REG
104
105 #define BMA150_SW_RES_POS       1
106 #define BMA150_SW_RES_MSK       0x02
107 #define BMA150_SW_RES_REG       BMA150_CTRL_0_REG
108
109 /* Any-motion interrupt register fields */
110 #define BMA150_ANY_MOTION_EN_POS        6
111 #define BMA150_ANY_MOTION_EN_MSK        0x40
112 #define BMA150_ANY_MOTION_EN_REG        BMA150_CTRL_1_REG
113
114 #define BMA150_ANY_MOTION_DUR_POS       6
115 #define BMA150_ANY_MOTION_DUR_MSK       0xC0
116 #define BMA150_ANY_MOTION_DUR_REG       BMA150_CFG_5_REG
117
118 #define BMA150_ANY_MOTION_THRES_REG     BMA150_CFG_4_REG
119
120 /* Advanced interrupt register fields */
121 #define BMA150_ADV_INT_EN_POS           6
122 #define BMA150_ADV_INT_EN_MSK           0x40
123 #define BMA150_ADV_INT_EN_REG           BMA150_CTRL_3_REG
124
125 /* High-G interrupt register fields */
126 #define BMA150_HIGH_G_EN_POS            1
127 #define BMA150_HIGH_G_EN_MSK            0x02
128 #define BMA150_HIGH_G_EN_REG            BMA150_CTRL_1_REG
129
130 #define BMA150_HIGH_G_HYST_POS          3
131 #define BMA150_HIGH_G_HYST_MSK          0x38
132 #define BMA150_HIGH_G_HYST_REG          BMA150_CFG_5_REG
133
134 #define BMA150_HIGH_G_DUR_REG           BMA150_CFG_3_REG
135 #define BMA150_HIGH_G_THRES_REG         BMA150_CFG_2_REG
136
137 /* Low-G interrupt register fields */
138 #define BMA150_LOW_G_EN_POS             0
139 #define BMA150_LOW_G_EN_MSK             0x01
140 #define BMA150_LOW_G_EN_REG             BMA150_CTRL_1_REG
141
142 #define BMA150_LOW_G_HYST_POS           0
143 #define BMA150_LOW_G_HYST_MSK           0x07
144 #define BMA150_LOW_G_HYST_REG           BMA150_CFG_5_REG
145
146 #define BMA150_LOW_G_DUR_REG            BMA150_CFG_1_REG
147 #define BMA150_LOW_G_THRES_REG          BMA150_CFG_0_REG
148
149 struct bma150_data {
150         struct i2c_client *client;
151         struct input_polled_dev *input_polled;
152         struct input_dev *input;
153         u8 mode;
154 };
155
156 /*
157  * The settings for the given range, bandwidth and interrupt features
158  * are stated and verified by Bosch Sensortec where they are configured
159  * to provide a generic sensitivity performance.
160  */
161 static struct bma150_cfg default_cfg __devinitdata = {
162         .any_motion_int = 1,
163         .hg_int = 1,
164         .lg_int = 1,
165         .any_motion_dur = 0,
166         .any_motion_thres = 0,
167         .hg_hyst = 0,
168         .hg_dur = 150,
169         .hg_thres = 160,
170         .lg_hyst = 0,
171         .lg_dur = 150,
172         .lg_thres = 20,
173         .range = BMA150_RANGE_2G,
174         .bandwidth = BMA150_BW_50HZ
175 };
176
177 static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
178 {
179         s32 ret;
180
181         /* As per specification, disable irq in between register writes */
182         if (client->irq)
183                 disable_irq_nosync(client->irq);
184
185         ret = i2c_smbus_write_byte_data(client, reg, val);
186
187         if (client->irq)
188                 enable_irq(client->irq);
189
190         return ret;
191 }
192
193 static int bma150_set_reg_bits(struct i2c_client *client,
194                                         int val, int shift, u8 mask, u8 reg)
195 {
196         int data;
197
198         data = i2c_smbus_read_byte_data(client, reg);
199         if (data < 0)
200                 return data;
201
202         data = (data & ~mask) | ((val << shift) & mask);
203         return bma150_write_byte(client, reg, data);
204 }
205
206 static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
207 {
208         int error;
209
210         error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
211                                 BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
212         if (error)
213                 return error;
214
215         error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
216                                 BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
217         if (error)
218                 return error;
219
220         if (mode == BMA150_MODE_NORMAL)
221                 msleep(2);
222
223         bma150->mode = mode;
224         return 0;
225 }
226
227 static int __devinit bma150_soft_reset(struct bma150_data *bma150)
228 {
229         int error;
230
231         error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
232                                 BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
233         if (error)
234                 return error;
235
236         msleep(2);
237         return 0;
238 }
239
240 static int __devinit bma150_set_range(struct bma150_data *bma150, u8 range)
241 {
242         return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
243                                 BMA150_RANGE_MSK, BMA150_RANGE_REG);
244 }
245
246 static int __devinit bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
247 {
248         return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
249                                 BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
250 }
251
252 static int __devinit bma150_set_low_g_interrupt(struct bma150_data *bma150,
253                                         u8 enable, u8 hyst, u8 dur, u8 thres)
254 {
255         int error;
256
257         error = bma150_set_reg_bits(bma150->client, hyst,
258                                 BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
259                                 BMA150_LOW_G_HYST_REG);
260         if (error)
261                 return error;
262
263         error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
264         if (error)
265                 return error;
266
267         error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
268         if (error)
269                 return error;
270
271         return bma150_set_reg_bits(bma150->client, !!enable,
272                                 BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
273                                 BMA150_LOW_G_EN_REG);
274 }
275
276 static int __devinit bma150_set_high_g_interrupt(struct bma150_data *bma150,
277                                         u8 enable, u8 hyst, u8 dur, u8 thres)
278 {
279         int error;
280
281         error = bma150_set_reg_bits(bma150->client, hyst,
282                                 BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
283                                 BMA150_HIGH_G_HYST_REG);
284         if (error)
285                 return error;
286
287         error = bma150_write_byte(bma150->client,
288                                 BMA150_HIGH_G_DUR_REG, dur);
289         if (error)
290                 return error;
291
292         error = bma150_write_byte(bma150->client,
293                                 BMA150_HIGH_G_THRES_REG, thres);
294         if (error)
295                 return error;
296
297         return bma150_set_reg_bits(bma150->client, !!enable,
298                                 BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
299                                 BMA150_HIGH_G_EN_REG);
300 }
301
302
303 static int __devinit bma150_set_any_motion_interrupt(struct bma150_data *bma150,
304                                                 u8 enable, u8 dur, u8 thres)
305 {
306         int error;
307
308         error = bma150_set_reg_bits(bma150->client, dur,
309                                 BMA150_ANY_MOTION_DUR_POS,
310                                 BMA150_ANY_MOTION_DUR_MSK,
311                                 BMA150_ANY_MOTION_DUR_REG);
312         if (error)
313                 return error;
314
315         error = bma150_write_byte(bma150->client,
316                                 BMA150_ANY_MOTION_THRES_REG, thres);
317         if (error)
318                 return error;
319
320         error = bma150_set_reg_bits(bma150->client, !!enable,
321                                 BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
322                                 BMA150_ADV_INT_EN_REG);
323         if (error)
324                 return error;
325
326         return bma150_set_reg_bits(bma150->client, !!enable,
327                                 BMA150_ANY_MOTION_EN_POS,
328                                 BMA150_ANY_MOTION_EN_MSK,
329                                 BMA150_ANY_MOTION_EN_REG);
330 }
331
332 static void bma150_report_xyz(struct bma150_data *bma150)
333 {
334         u8 data[BMA150_XYZ_DATA_SIZE];
335         s16 x, y, z;
336         s32 ret;
337
338         ret = i2c_smbus_read_i2c_block_data(bma150->client,
339                         BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
340         if (ret != BMA150_XYZ_DATA_SIZE)
341                 return;
342
343         x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
344         y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
345         z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
346
347         /* sign extension */
348         x = (s16) (x << 6) >> 6;
349         y = (s16) (y << 6) >> 6;
350         z = (s16) (z << 6) >> 6;
351
352         input_report_abs(bma150->input, ABS_X, x);
353         input_report_abs(bma150->input, ABS_Y, y);
354         input_report_abs(bma150->input, ABS_Z, z);
355         input_sync(bma150->input);
356 }
357
358 static irqreturn_t bma150_irq_thread(int irq, void *dev)
359 {
360         bma150_report_xyz(dev);
361
362         return IRQ_HANDLED;
363 }
364
365 static void bma150_poll(struct input_polled_dev *dev)
366 {
367         bma150_report_xyz(dev->private);
368 }
369
370 static int bma150_open(struct bma150_data *bma150)
371 {
372         int error;
373
374         error = pm_runtime_get_sync(&bma150->client->dev);
375         if (error && error != -ENOSYS)
376                 return error;
377
378         /*
379          * See if runtime PM woke up the device. If runtime PM
380          * is disabled we need to do it ourselves.
381          */
382         if (bma150->mode != BMA150_MODE_NORMAL) {
383                 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
384                 if (error)
385                         return error;
386         }
387
388         return 0;
389 }
390
391 static void bma150_close(struct bma150_data *bma150)
392 {
393         pm_runtime_put_sync(&bma150->client->dev);
394
395         if (bma150->mode != BMA150_MODE_SLEEP)
396                 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
397 }
398
399 static int bma150_irq_open(struct input_dev *input)
400 {
401         struct bma150_data *bma150 = input_get_drvdata(input);
402
403         return bma150_open(bma150);
404 }
405
406 static void bma150_irq_close(struct input_dev *input)
407 {
408         struct bma150_data *bma150 = input_get_drvdata(input);
409
410         bma150_close(bma150);
411 }
412
413 static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
414 {
415         struct bma150_data *bma150 = ipoll_dev->private;
416
417         bma150_open(bma150);
418 }
419
420 static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
421 {
422         struct bma150_data *bma150 = ipoll_dev->private;
423
424         bma150_close(bma150);
425 }
426
427 static int __devinit bma150_initialize(struct bma150_data *bma150,
428                                        const struct bma150_cfg *cfg)
429 {
430         int error;
431
432         error = bma150_soft_reset(bma150);
433         if (error)
434                 return error;
435
436         error = bma150_set_bandwidth(bma150, cfg->bandwidth);
437         if (error)
438                 return error;
439
440         error = bma150_set_range(bma150, cfg->range);
441         if (error)
442                 return error;
443
444         if (bma150->client->irq) {
445                 error = bma150_set_any_motion_interrupt(bma150,
446                                         cfg->any_motion_int,
447                                         cfg->any_motion_dur,
448                                         cfg->any_motion_thres);
449                 if (error)
450                         return error;
451
452                 error = bma150_set_high_g_interrupt(bma150,
453                                         cfg->hg_int, cfg->hg_hyst,
454                                         cfg->hg_dur, cfg->hg_thres);
455                 if (error)
456                         return error;
457
458                 error = bma150_set_low_g_interrupt(bma150,
459                                         cfg->lg_int, cfg->lg_hyst,
460                                         cfg->lg_dur, cfg->lg_thres);
461                 if (error)
462                         return error;
463         }
464
465         return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
466 }
467
468 static void __devinit bma150_init_input_device(struct bma150_data *bma150,
469                                                 struct input_dev *idev)
470 {
471         idev->name = BMA150_DRIVER;
472         idev->phys = BMA150_DRIVER "/input0";
473         idev->id.bustype = BUS_I2C;
474         idev->dev.parent = &bma150->client->dev;
475
476         idev->evbit[0] = BIT_MASK(EV_ABS);
477         input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
478         input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
479         input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
480 }
481
482 static int __devinit bma150_register_input_device(struct bma150_data *bma150)
483 {
484         struct input_dev *idev;
485         int error;
486
487         idev = input_allocate_device();
488         if (!idev)
489                 return -ENOMEM;
490
491         bma150_init_input_device(bma150, idev);
492
493         idev->open = bma150_irq_open;
494         idev->close = bma150_irq_close;
495         input_set_drvdata(idev, bma150);
496
497         error = input_register_device(idev);
498         if (error) {
499                 input_free_device(idev);
500                 return error;
501         }
502
503         bma150->input = idev;
504         return 0;
505 }
506
507 static int __devinit bma150_register_polled_device(struct bma150_data *bma150)
508 {
509         struct input_polled_dev *ipoll_dev;
510         int error;
511
512         ipoll_dev = input_allocate_polled_device();
513         if (!ipoll_dev)
514                 return -ENOMEM;
515
516         ipoll_dev->private = bma150;
517         ipoll_dev->open = bma150_poll_open;
518         ipoll_dev->close = bma150_poll_close;
519         ipoll_dev->poll = bma150_poll;
520         ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
521         ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
522         ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
523
524         bma150_init_input_device(bma150, ipoll_dev->input);
525
526         error = input_register_polled_device(ipoll_dev);
527         if (error) {
528                 input_free_polled_device(ipoll_dev);
529                 return error;
530         }
531
532         bma150->input_polled = ipoll_dev;
533         bma150->input = ipoll_dev->input;
534
535         return 0;
536 }
537
538 static int __devinit bma150_probe(struct i2c_client *client,
539                                   const struct i2c_device_id *id)
540 {
541         const struct bma150_platform_data *pdata = client->dev.platform_data;
542         const struct bma150_cfg *cfg;
543         struct bma150_data *bma150;
544         int chip_id;
545         int error;
546
547         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
548                 dev_err(&client->dev, "i2c_check_functionality error\n");
549                 return -EIO;
550         }
551
552         chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
553         if (chip_id != BMA150_CHIP_ID) {
554                 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
555                 return -EINVAL;
556         }
557
558         bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
559         if (!bma150)
560                 return -ENOMEM;
561
562         bma150->client = client;
563
564         if (pdata) {
565                 if (pdata->irq_gpio_cfg) {
566                         error = pdata->irq_gpio_cfg();
567                         if (error) {
568                                 dev_err(&client->dev,
569                                         "IRQ GPIO conf. error %d, error %d\n",
570                                         client->irq, error);
571                                 goto err_free_mem;
572                         }
573                 }
574                 cfg = &pdata->cfg;
575         } else {
576                 cfg = &default_cfg;
577         }
578
579         error = bma150_initialize(bma150, cfg);
580         if (error)
581                 goto err_free_mem;
582
583         if (client->irq > 0) {
584                 error = bma150_register_input_device(bma150);
585                 if (error)
586                         goto err_free_mem;
587
588                 error = request_threaded_irq(client->irq,
589                                         NULL, bma150_irq_thread,
590                                         IRQF_TRIGGER_RISING | IRQF_ONESHOT,
591                                         BMA150_DRIVER, bma150);
592                 if (error) {
593                         dev_err(&client->dev,
594                                 "irq request failed %d, error %d\n",
595                                 client->irq, error);
596                         input_unregister_device(bma150->input);
597                         goto err_free_mem;
598                 }
599         } else {
600                 error = bma150_register_polled_device(bma150);
601                 if (error)
602                         goto err_free_mem;
603         }
604
605         i2c_set_clientdata(client, bma150);
606
607         pm_runtime_enable(&client->dev);
608
609         return 0;
610
611 err_free_mem:
612         kfree(bma150);
613         return error;
614 }
615
616 static int __devexit bma150_remove(struct i2c_client *client)
617 {
618         struct bma150_data *bma150 = i2c_get_clientdata(client);
619
620         pm_runtime_disable(&client->dev);
621
622         if (client->irq > 0) {
623                 free_irq(client->irq, bma150);
624                 input_unregister_device(bma150->input);
625         } else {
626                 input_unregister_polled_device(bma150->input_polled);
627                 input_free_polled_device(bma150->input_polled);
628         }
629
630         kfree(bma150);
631
632         return 0;
633 }
634
635 #ifdef CONFIG_PM
636 static int bma150_suspend(struct device *dev)
637 {
638         struct i2c_client *client = to_i2c_client(dev);
639         struct bma150_data *bma150 = i2c_get_clientdata(client);
640
641         return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
642 }
643
644 static int bma150_resume(struct device *dev)
645 {
646         struct i2c_client *client = to_i2c_client(dev);
647         struct bma150_data *bma150 = i2c_get_clientdata(client);
648
649         return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
650 }
651 #endif
652
653 static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
654
655 static const struct i2c_device_id bma150_id[] = {
656         { "bma150", 0 },
657         { "smb380", 0 },
658         { "bma023", 0 },
659         { }
660 };
661
662 MODULE_DEVICE_TABLE(i2c, bma150_id);
663
664 static struct i2c_driver bma150_driver = {
665         .driver = {
666                 .owner  = THIS_MODULE,
667                 .name   = BMA150_DRIVER,
668                 .pm     = &bma150_pm,
669         },
670         .class          = I2C_CLASS_HWMON,
671         .id_table       = bma150_id,
672         .probe          = bma150_probe,
673         .remove         = __devexit_p(bma150_remove),
674 };
675
676 static int __init BMA150_init(void)
677 {
678         return i2c_add_driver(&bma150_driver);
679 }
680
681 static void __exit BMA150_exit(void)
682 {
683         i2c_del_driver(&bma150_driver);
684 }
685
686 MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
687 MODULE_DESCRIPTION("BMA150 driver");
688 MODULE_LICENSE("GPL");
689
690 module_init(BMA150_init);
691 module_exit(BMA150_exit);