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thermal: fair_share: use the weight from the thermal instance
[deliverable/linux.git] / drivers / iio / accel / mma9553.c
CommitLineData
40cb7613
IT		 1/*
2 * Freescale MMA9553L Intelligent Pedometer driver
3 * Copyright (c) 2014, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 */
14
15#include <linux/module.h>
16#include <linux/i2c.h>
17#include <linux/interrupt.h>
18#include <linux/slab.h>
19#include <linux/acpi.h>
20#include <linux/gpio/consumer.h>
21#include <linux/iio/iio.h>
22#include <linux/iio/sysfs.h>
23#include <linux/iio/events.h>
24#include <linux/pm_runtime.h>
25#include "mma9551_core.h"
26
27#define MMA9553_DRV_NAME "mma9553"
28#define MMA9553_IRQ_NAME "mma9553_event"
29#define MMA9553_GPIO_NAME "mma9553_int"
30
31/* Pedometer configuration registers (R/W) */
32#define MMA9553_REG_CONF_SLEEPMIN 0x00
33#define MMA9553_REG_CONF_SLEEPMAX 0x02
34#define MMA9553_REG_CONF_SLEEPTHD 0x04
35#define MMA9553_MASK_CONF_WORD GENMASK(15, 0)
36
37#define MMA9553_REG_CONF_CONF_STEPLEN 0x06
38#define MMA9553_MASK_CONF_CONFIG BIT(15)
39#define MMA9553_MASK_CONF_ACT_DBCNTM BIT(14)
40#define MMA9553_MASK_CONF_SLP_DBCNTM BIT(13)
41#define MMA9553_MASK_CONF_STEPLEN GENMASK(7, 0)
42
43#define MMA9553_REG_CONF_HEIGHT_WEIGHT 0x08
44#define MMA9553_MASK_CONF_HEIGHT GENMASK(15, 8)
45#define MMA9553_MASK_CONF_WEIGHT GENMASK(7, 0)
46
47#define MMA9553_REG_CONF_FILTER 0x0A
48#define MMA9553_MASK_CONF_FILTSTEP GENMASK(15, 8)
49#define MMA9553_MASK_CONF_MALE BIT(7)
50#define MMA9553_MASK_CONF_FILTTIME GENMASK(6, 0)
51
52#define MMA9553_REG_CONF_SPEED_STEP 0x0C
53#define MMA9553_MASK_CONF_SPDPRD GENMASK(15, 8)
54#define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0)
55
56#define MMA9553_REG_CONF_ACTTHD 0x0E
57
58/* Pedometer status registers (R-only) */
59#define MMA9553_REG_STATUS 0x00
60#define MMA9553_MASK_STATUS_MRGFL BIT(15)
61#define MMA9553_MASK_STATUS_SUSPCHG BIT(14)
62#define MMA9553_MASK_STATUS_STEPCHG BIT(13)
63#define MMA9553_MASK_STATUS_ACTCHG BIT(12)
64#define MMA9553_MASK_STATUS_SUSP BIT(11)
65#define MMA9553_MASK_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8))
66#define MMA9553_MASK_STATUS_VERSION 0x00FF
67
68#define MMA9553_REG_STEPCNT 0x02
69#define MMA9553_REG_DISTANCE 0x04
70#define MMA9553_REG_SPEED 0x06
71#define MMA9553_REG_CALORIES 0x08
72#define MMA9553_REG_SLEEPCNT 0x0A
73
74/* Pedometer events are always mapped to this pin. */
75#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
76#define MMA9553_DEFAULT_GPIO_POLARITY 0
77
78/* Bitnum used for gpio configuration = bit number in high status byte */
79#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
80
81#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
82
83/*
84 * The internal activity level must be stable for ACTTHD samples before
85 * ACTIVITY is updated.The ACTIVITY variable contains the current activity
86 * level and is updated every time a step is detected or once a second
87 * if there are no steps.
88 */
89#define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
90#define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
91
92/*
93 * Autonomously suspend pedometer if acceleration vector magnitude
94 * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
95 */
96#define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */
97#define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */
98#define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
99
100#define MMA9553_CONFIG_RETRIES 2
101
102/* Status register - activity field */
103enum activity_level {
104 ACTIVITY_UNKNOWN,
105 ACTIVITY_REST,
106 ACTIVITY_WALKING,
107 ACTIVITY_JOGGING,
108 ACTIVITY_RUNNING,
109};
110
111static struct mma9553_event_info {
112 enum iio_chan_type type;
113 enum iio_modifier mod;
114 enum iio_event_direction dir;
115} mma9553_events_info[] = {
116 {
117 .type = IIO_STEPS,
118 .mod = IIO_NO_MOD,
119 .dir = IIO_EV_DIR_NONE,
120 },
121 {
122 .type = IIO_ACTIVITY,
123 .mod = IIO_MOD_STILL,
124 .dir = IIO_EV_DIR_RISING,
125 },
126 {
127 .type = IIO_ACTIVITY,
128 .mod = IIO_MOD_STILL,
129 .dir = IIO_EV_DIR_FALLING,
130 },
131 {
132 .type = IIO_ACTIVITY,
133 .mod = IIO_MOD_WALKING,
134 .dir = IIO_EV_DIR_RISING,
135 },
136 {
137 .type = IIO_ACTIVITY,
138 .mod = IIO_MOD_WALKING,
139 .dir = IIO_EV_DIR_FALLING,
140 },
141 {
142 .type = IIO_ACTIVITY,
143 .mod = IIO_MOD_JOGGING,
144 .dir = IIO_EV_DIR_RISING,
145 },
146 {
147 .type = IIO_ACTIVITY,
148 .mod = IIO_MOD_JOGGING,
149 .dir = IIO_EV_DIR_FALLING,
150 },
151 {
152 .type = IIO_ACTIVITY,
153 .mod = IIO_MOD_RUNNING,
154 .dir = IIO_EV_DIR_RISING,
155 },
156 {
157 .type = IIO_ACTIVITY,
158 .mod = IIO_MOD_RUNNING,
159 .dir = IIO_EV_DIR_FALLING,
160 },
161};
162
163#define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
164
165struct mma9553_event {
166 struct mma9553_event_info *info;
167 bool enabled;
168};
169
170struct mma9553_conf_regs {
171 u16 sleepmin;
172 u16 sleepmax;
173 u16 sleepthd;
174 u16 config;
175 u16 height_weight;
176 u16 filter;
177 u16 speed_step;
178 u16 actthd;
179} __packed;
180
181struct mma9553_data {
182 struct i2c_client *client;
183 struct mutex mutex;
184 struct mma9553_conf_regs conf;
185 struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
186 int num_events;
187 u8 gpio_bitnum;
188 /*
189 * This is used for all features that depend on step count:
190 * step count, distance, speed, calories.
191 */
192 bool stepcnt_enabled;
193 u16 stepcnt;
194 u8 activity;
195 s64 timestamp;
196};
197
198static u8 mma9553_get_bits(u16 val, u16 mask)
199{
200 return (val & mask) >> (ffs(mask) - 1);
201}
202
203static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
204{
205 return (current_val & ~mask) | (val << (ffs(mask) - 1));
206}
207
208static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
209{
210 switch (activity) {
211 case ACTIVITY_RUNNING:
212 return IIO_MOD_RUNNING;
213 case ACTIVITY_JOGGING:
214 return IIO_MOD_JOGGING;
215 case ACTIVITY_WALKING:
216 return IIO_MOD_WALKING;
217 case ACTIVITY_REST:
218 return IIO_MOD_STILL;
219 case ACTIVITY_UNKNOWN:
220 default:
221 return IIO_NO_MOD;
222 }
223}
224
225static void mma9553_init_events(struct mma9553_data *data)
226{
227 int i;
228
229 data->num_events = MMA9553_EVENTS_INFO_SIZE;
230 for (i = 0; i < data->num_events; i++) {
231 data->events[i].info = &mma9553_events_info[i];
232 data->events[i].enabled = false;
233 }
234}
235
236static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
237 enum iio_chan_type type,
238 enum iio_modifier mod,
239 enum iio_event_direction dir)
240{
241 int i;
242
243 for (i = 0; i < data->num_events; i++)
244 if (data->events[i].info->type == type &&
245 data->events[i].info->mod == mod &&
246 data->events[i].info->dir == dir)
247 return &data->events[i];
248
249 return NULL;
250}
251
252static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
253 bool check_type,
254 enum iio_chan_type type)
255{
256 int i;
257
258 for (i = 0; i < data->num_events; i++)
259 if ((check_type && data->events[i].info->type == type &&
260 data->events[i].enabled) ||
261 (!check_type && data->events[i].enabled))
262 return true;
263
264 return false;
265}
266
267static int mma9553_set_config(struct mma9553_data *data, u16 reg,
268 u16 *p_reg_val, u16 val, u16 mask)
269{
270 int ret, retries;
271 u16 reg_val, config;
272
273 reg_val = *p_reg_val;
274 if (val == mma9553_get_bits(reg_val, mask))
275 return 0;
276
277 reg_val = mma9553_set_bits(reg_val, val, mask);
278 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
279 reg, reg_val);
280 if (ret < 0) {
281 dev_err(&data->client->dev,
282 "error writing config register 0x%x\n", reg);
283 return ret;
284 }
285
286 *p_reg_val = reg_val;
287
288 /* Reinitializes the pedometer with current configuration values */
289 config = mma9553_set_bits(data->conf.config, 1,
290 MMA9553_MASK_CONF_CONFIG);
291
292 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
293 MMA9553_REG_CONF_CONF_STEPLEN, config);
294 if (ret < 0) {
295 dev_err(&data->client->dev,
296 "error writing config register 0x%x\n",
297 MMA9553_REG_CONF_CONF_STEPLEN);
298 return ret;
299 }
300
301 retries = MMA9553_CONFIG_RETRIES;
302 do {
303 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
304 ret = mma9551_read_config_word(data->client,
305 MMA9551_APPID_PEDOMETER,
306 MMA9553_REG_CONF_CONF_STEPLEN,
307 &config);
308 if (ret < 0)
309 return ret;
310 } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
311 --retries > 0);
312
313 return 0;
314}
315
316static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
317 u8 *activity, u16 *stepcnt)
318{
319 u32 status_stepcnt;
320 u16 status;
321 int ret;
322
323 ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
324 MMA9553_REG_STATUS, sizeof(u32),
325 (u16 *) &status_stepcnt);
326 if (ret < 0) {
327 dev_err(&data->client->dev,
328 "error reading status and stepcnt\n");
329 return ret;
330 }
331
332 status = status_stepcnt & MMA9553_MASK_CONF_WORD;
333 *activity = mma9553_get_bits(status, MMA9553_MASK_STATUS_ACTIVITY);
334 *stepcnt = status_stepcnt >> 16;
335
336 return 0;
337}
338
339static int mma9553_conf_gpio(struct mma9553_data *data)
340{
341 u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
342 int ret;
343 struct mma9553_event *ev_step_detect;
344 bool activity_enabled;
345
346 activity_enabled =
347 mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
348 ev_step_detect =
349 mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
350
351 /*
352 * If both step detector and activity are enabled, use the MRGFL bit.
353 * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
354 */
355 if (activity_enabled && ev_step_detect->enabled)
356 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
357 else if (ev_step_detect->enabled)
358 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
359 else if (activity_enabled)
360 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
361 else /* Reset */
362 appid = MMA9551_APPID_NONE;
363
364 if (data->gpio_bitnum == bitnum)
365 return 0;
366
367 /* Save initial values for activity and stepcnt */
368 if (activity_enabled || ev_step_detect->enabled)
369 mma9553_read_activity_stepcnt(data, &data->activity,
370 &data->stepcnt);
371
372 ret = mma9551_gpio_config(data->client,
373 MMA9553_DEFAULT_GPIO_PIN,
374 appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
375 if (ret < 0)
376 return ret;
377 data->gpio_bitnum = bitnum;
378
379 return 0;
380}
381
382static int mma9553_init(struct mma9553_data *data)
383{
384 int ret;
385
386 ret = mma9551_read_version(data->client);
387 if (ret)
388 return ret;
389
390 /*
391 * Read all the pedometer configuration registers. This is used as
392 * a device identification command to differentiate the MMA9553L
393 * from the MMA9550L.
394 */
395 ret =
396 mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
397 MMA9553_REG_CONF_SLEEPMIN,
398 sizeof(data->conf), (u16 *) &data->conf);
399 if (ret < 0) {
400 dev_err(&data->client->dev,
401 "device is not MMA9553L: failed to read cfg regs\n");
402 return ret;
403 }
404
405
406 /* Reset gpio */
407 data->gpio_bitnum = -1;
408 ret = mma9553_conf_gpio(data);
409 if (ret < 0)
410 return ret;
411
412 ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
413 if (ret < 0)
414 return ret;
415
416 /* Init config registers */
417 data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
418 data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
419 data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
420 data->conf.config =
421 mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
422 /*
423 * Clear the activity debounce counter when the activity level changes,
424 * so that the confidence level applies for any activity level.
425 */
426 data->conf.config = mma9553_set_bits(data->conf.config, 1,
427 MMA9553_MASK_CONF_ACT_DBCNTM);
428 ret =
429 mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
430 MMA9553_REG_CONF_SLEEPMIN,
431 sizeof(data->conf), (u16 *) &data->conf);
432 if (ret < 0) {
433 dev_err(&data->client->dev,
434 "failed to write configuration registers\n");
435 return ret;
436 }
437
438 return mma9551_set_device_state(data->client, true);
439}
440
441static int mma9553_read_raw(struct iio_dev *indio_dev,
442 struct iio_chan_spec const *chan,
443 int *val, int *val2, long mask)
444{
445 struct mma9553_data *data = iio_priv(indio_dev);
446 int ret;
447 u16 tmp;
448 u8 activity;
449 bool powered_on;
450
451 switch (mask) {
452 case IIO_CHAN_INFO_PROCESSED:
453 switch (chan->type) {
454 case IIO_STEPS:
455 /*
456 * The HW only counts steps and other dependent
457 * parameters (speed, distance, calories, activity)
458 * if power is on (from enabling an event or the
459 * step counter */
460 powered_on =
461 mma9553_is_any_event_enabled(data, false, 0) ||
462 data->stepcnt_enabled;
463 if (!powered_on) {
464 dev_err(&data->client->dev,
465 "No channels enabled\n");
466 return -EINVAL;
467 }
468 mutex_lock(&data->mutex);
469 ret = mma9551_read_status_word(data->client,
470 MMA9551_APPID_PEDOMETER,
471 MMA9553_REG_STEPCNT,
472 &tmp);
473 mutex_unlock(&data->mutex);
474 if (ret < 0)
475 return ret;
476 *val = tmp;
477 return IIO_VAL_INT;
478 case IIO_DISTANCE:
479 powered_on =
480 mma9553_is_any_event_enabled(data, false, 0) ||
481 data->stepcnt_enabled;
482 if (!powered_on) {
483 dev_err(&data->client->dev,
484 "No channels enabled\n");
485 return -EINVAL;
486 }
487 mutex_lock(&data->mutex);
488 ret = mma9551_read_status_word(data->client,
489 MMA9551_APPID_PEDOMETER,
490 MMA9553_REG_DISTANCE,
491 &tmp);
492 mutex_unlock(&data->mutex);
493 if (ret < 0)
494 return ret;
495 *val = tmp;
496 return IIO_VAL_INT;
497 case IIO_ACTIVITY:
498 powered_on =
499 mma9553_is_any_event_enabled(data, false, 0) ||
500 data->stepcnt_enabled;
501 if (!powered_on) {
502 dev_err(&data->client->dev,
503 "No channels enabled\n");
504 return -EINVAL;
505 }
506 mutex_lock(&data->mutex);
507 ret = mma9551_read_status_word(data->client,
508 MMA9551_APPID_PEDOMETER,
509 MMA9553_REG_STATUS,
510 &tmp);
511 mutex_unlock(&data->mutex);
512 if (ret < 0)
513 return ret;
514
515 activity =
516 mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
517
518 /*
519 * The device does not support confidence value levels,
520 * so we will always have 100% for current activity and
521 * 0% for the others.
522 */
523 if (chan->channel2 == mma9553_activity_to_mod(activity))
524 *val = 100;
525 else
526 *val = 0;
527 return IIO_VAL_INT;
528 default:
529 return -EINVAL;
530 }
531 case IIO_CHAN_INFO_RAW:
532 switch (chan->type) {
533 case IIO_VELOCITY: /* m/h */
534 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
535 return -EINVAL;
536 powered_on =
537 mma9553_is_any_event_enabled(data, false, 0) ||
538 data->stepcnt_enabled;
539 if (!powered_on) {
540 dev_err(&data->client->dev,
541 "No channels enabled\n");
542 return -EINVAL;
543 }
544 mutex_lock(&data->mutex);
545 ret = mma9551_read_status_word(data->client,
546 MMA9551_APPID_PEDOMETER,
547 MMA9553_REG_SPEED, &tmp);
548 mutex_unlock(&data->mutex);
549 if (ret < 0)
550 return ret;
551 *val = tmp;
552 return IIO_VAL_INT;
553 case IIO_ENERGY: /* Cal or kcal */
554 powered_on =
555 mma9553_is_any_event_enabled(data, false, 0) ||
556 data->stepcnt_enabled;
557 if (!powered_on) {
558 dev_err(&data->client->dev,
559 "No channels enabled\n");
560 return -EINVAL;
561 }
562 mutex_lock(&data->mutex);
563 ret = mma9551_read_status_word(data->client,
564 MMA9551_APPID_PEDOMETER,
565 MMA9553_REG_CALORIES,
566 &tmp);
567 mutex_unlock(&data->mutex);
568 if (ret < 0)
569 return ret;
570 *val = tmp;
571 return IIO_VAL_INT;
572 case IIO_ACCEL:
573 mutex_lock(&data->mutex);
574 ret = mma9551_read_accel_chan(data->client,
575 chan, val, val2);
576 mutex_unlock(&data->mutex);
577 return ret;
578 default:
579 return -EINVAL;
580 }
581 case IIO_CHAN_INFO_SCALE:
582 switch (chan->type) {
583 case IIO_VELOCITY: /* m/h to m/s */
584 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
585 return -EINVAL;
586 *val = 0;
587 *val2 = 277; /* 0.000277 */
588 return IIO_VAL_INT_PLUS_MICRO;
589 case IIO_ENERGY: /* Cal or kcal to J */
590 *val = 4184;
591 return IIO_VAL_INT;
592 case IIO_ACCEL:
593 return mma9551_read_accel_scale(val, val2);
594 default:
595 return -EINVAL;
596 }
597 case IIO_CHAN_INFO_ENABLE:
598 *val = data->stepcnt_enabled;
599 return IIO_VAL_INT;
600 case IIO_CHAN_INFO_CALIBHEIGHT:
601 tmp = mma9553_get_bits(data->conf.height_weight,
602 MMA9553_MASK_CONF_HEIGHT);
603 *val = tmp / 100; /* cm to m */
604 *val2 = (tmp % 100) * 10000;
605 return IIO_VAL_INT_PLUS_MICRO;
606 case IIO_CHAN_INFO_CALIBWEIGHT:
607 *val = mma9553_get_bits(data->conf.height_weight,
608 MMA9553_MASK_CONF_WEIGHT);
609 return IIO_VAL_INT;
610 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
611 switch (chan->type) {
612 case IIO_STEPS:
613 *val = mma9553_get_bits(data->conf.filter,
614 MMA9553_MASK_CONF_FILTSTEP);
615 return IIO_VAL_INT;
616 default:
617 return -EINVAL;
618 }
619 case IIO_CHAN_INFO_DEBOUNCE_TIME:
620 switch (chan->type) {
621 case IIO_STEPS:
622 *val = mma9553_get_bits(data->conf.filter,
623 MMA9553_MASK_CONF_FILTTIME);
624 return IIO_VAL_INT;
625 default:
626 return -EINVAL;
627 }
628 case IIO_CHAN_INFO_INT_TIME:
629 switch (chan->type) {
630 case IIO_VELOCITY:
631 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
632 return -EINVAL;
633 *val = mma9553_get_bits(data->conf.speed_step,
634 MMA9553_MASK_CONF_SPDPRD);
635 return IIO_VAL_INT;
636 default:
637 return -EINVAL;
638 }
639 default:
640 return -EINVAL;
641 }
642}
643
644static int mma9553_write_raw(struct iio_dev *indio_dev,
645 struct iio_chan_spec const *chan,
646 int val, int val2, long mask)
647{
648 struct mma9553_data *data = iio_priv(indio_dev);
649 int ret, tmp;
650
651 switch (mask) {
652 case IIO_CHAN_INFO_ENABLE:
653 if (data->stepcnt_enabled == !!val)
654 return 0;
655 mutex_lock(&data->mutex);
656 ret = mma9551_set_power_state(data->client, val);
657 if (ret < 0) {
658 mutex_unlock(&data->mutex);
659 return ret;
660 }
661 data->stepcnt_enabled = val;
662 mutex_unlock(&data->mutex);
663 return 0;
664 case IIO_CHAN_INFO_CALIBHEIGHT:
665 /* m to cm */
666 tmp = val * 100 + val2 / 10000;
667 if (tmp < 0 || tmp > 255)
668 return -EINVAL;
669 mutex_lock(&data->mutex);
670 ret = mma9553_set_config(data,
671 MMA9553_REG_CONF_HEIGHT_WEIGHT,
672 &data->conf.height_weight,
673 tmp, MMA9553_MASK_CONF_HEIGHT);
674 mutex_unlock(&data->mutex);
675 return ret;
676 case IIO_CHAN_INFO_CALIBWEIGHT:
677 if (val < 0 || val > 255)
678 return -EINVAL;
679 mutex_lock(&data->mutex);
680 ret = mma9553_set_config(data,
681 MMA9553_REG_CONF_HEIGHT_WEIGHT,
682 &data->conf.height_weight,
683 val, MMA9553_MASK_CONF_WEIGHT);
684 mutex_unlock(&data->mutex);
685 return ret;
686 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
687 switch (chan->type) {
688 case IIO_STEPS:
689 /*
690 * Set to 0 to disable step filtering. If the value
691 * specified is greater than 6, then 6 will be used.
692 */
693 if (val < 0)
694 return -EINVAL;
695 if (val > 6)
696 val = 6;
697 mutex_lock(&data->mutex);
698 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
699 &data->conf.filter, val,
700 MMA9553_MASK_CONF_FILTSTEP);
701 mutex_unlock(&data->mutex);
702 return ret;
703 default:
704 return -EINVAL;
705 }
706 case IIO_CHAN_INFO_DEBOUNCE_TIME:
707 switch (chan->type) {
708 case IIO_STEPS:
709 if (val < 0 || val > 127)
710 return -EINVAL;
711 mutex_lock(&data->mutex);
712 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
713 &data->conf.filter, val,
714 MMA9553_MASK_CONF_FILTTIME);
715 mutex_unlock(&data->mutex);
716 return ret;
717 default:
718 return -EINVAL;
719 }
720 case IIO_CHAN_INFO_INT_TIME:
721 switch (chan->type) {
722 case IIO_VELOCITY:
723 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
724 return -EINVAL;
725 /*
726 * If set to a value greater than 5, then 5 will be
727 * used. Warning: Do not set SPDPRD to 0 or 1 as
728 * this may cause undesirable behavior.
729 */
730 if (val < 2)
731 return -EINVAL;
732 if (val > 5)
733 val = 5;
734 mutex_lock(&data->mutex);
735 ret = mma9553_set_config(data,
736 MMA9553_REG_CONF_SPEED_STEP,
737 &data->conf.speed_step, val,
738 MMA9553_MASK_CONF_SPDPRD);
739 mutex_unlock(&data->mutex);
740 return ret;
741 default:
742 return -EINVAL;
743 }
744 default:
745 return -EINVAL;
746 }
747}
748
749static int mma9553_read_event_config(struct iio_dev *indio_dev,
750 const struct iio_chan_spec *chan,
751 enum iio_event_type type,
752 enum iio_event_direction dir)
753{
754
755 struct mma9553_data *data = iio_priv(indio_dev);
756 struct mma9553_event *event;
757
758 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
759 if (!event)
760 return -EINVAL;
761
762 return event->enabled;
763}
764
765static int mma9553_write_event_config(struct iio_dev *indio_dev,
766 const struct iio_chan_spec *chan,
767 enum iio_event_type type,
768 enum iio_event_direction dir, int state)
769{
770 struct mma9553_data *data = iio_priv(indio_dev);
771 struct mma9553_event *event;
772 int ret;
773
774 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
775 if (!event)
776 return -EINVAL;
777
778 if (event->enabled == state)
779 return 0;
780
781 mutex_lock(&data->mutex);
782
783 ret = mma9551_set_power_state(data->client, state);
784 if (ret < 0)
785 goto err_out;
786 event->enabled = state;
787
788 ret = mma9553_conf_gpio(data);
789 if (ret < 0)
790 goto err_conf_gpio;
791
792 mutex_unlock(&data->mutex);
793
794 return ret;
795
796err_conf_gpio:
797 if (state) {
798 event->enabled = false;
799 mma9551_set_power_state(data->client, false);
800 }
801err_out:
802 mutex_unlock(&data->mutex);
803 return ret;
804}
805
806static int mma9553_read_event_value(struct iio_dev *indio_dev,
807 const struct iio_chan_spec *chan,
808 enum iio_event_type type,
809 enum iio_event_direction dir,
810 enum iio_event_info info,
811 int *val, int *val2)
812{
813 struct mma9553_data *data = iio_priv(indio_dev);
814
815 *val2 = 0;
816 switch (info) {
817 case IIO_EV_INFO_VALUE:
818 switch (chan->type) {
819 case IIO_STEPS:
820 *val = mma9553_get_bits(data->conf.speed_step,
821 MMA9553_MASK_CONF_STEPCOALESCE);
822 return IIO_VAL_INT;
823 case IIO_ACTIVITY:
824 /*
825 * The device does not support confidence value levels.
826 * We set an average of 50%.
827 */
828 *val = 50;
829 return IIO_VAL_INT;
830 default:
831 return -EINVAL;
832 }
833 case IIO_EV_INFO_PERIOD:
834 switch (chan->type) {
835 case IIO_ACTIVITY:
836 *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
837 return IIO_VAL_INT;
838 default:
839 return -EINVAL;
840 }
841 default:
842 return -EINVAL;
843 }
844}
845
846static int mma9553_write_event_value(struct iio_dev *indio_dev,
847 const struct iio_chan_spec *chan,
848 enum iio_event_type type,
849 enum iio_event_direction dir,
850 enum iio_event_info info,
851 int val, int val2)
852{
853 struct mma9553_data *data = iio_priv(indio_dev);
854 int ret;
855
856 switch (info) {
857 case IIO_EV_INFO_VALUE:
858 switch (chan->type) {
859 case IIO_STEPS:
860 if (val < 0 || val > 255)
861 return -EINVAL;
862 mutex_lock(&data->mutex);
863 ret = mma9553_set_config(data,
864 MMA9553_REG_CONF_SPEED_STEP,
865 &data->conf.speed_step, val,
866 MMA9553_MASK_CONF_STEPCOALESCE);
867 mutex_unlock(&data->mutex);
868 return ret;
869 default:
870 return -EINVAL;
871 }
872 case IIO_EV_INFO_PERIOD:
873 switch (chan->type) {
874 case IIO_ACTIVITY:
875 mutex_lock(&data->mutex);
876 ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
877 &data->conf.actthd,
878 MMA9553_ACTIVITY_SEC_TO_THD
879 (val), MMA9553_MASK_CONF_WORD);
880 mutex_unlock(&data->mutex);
881 return ret;
882 default:
883 return -EINVAL;
884 }
885 default:
886 return -EINVAL;
887 }
888}
889
890static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
891 const struct iio_chan_spec *chan)
892{
893 struct mma9553_data *data = iio_priv(indio_dev);
894 u8 gender;
895
896 gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
897 /*
898 * HW expects 0 for female and 1 for male,
899 * while iio index is 0 for male and 1 for female
900 */
901 return !gender;
902}
903
904static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
905 const struct iio_chan_spec *chan,
906 unsigned int mode)
907{
908 struct mma9553_data *data = iio_priv(indio_dev);
909 u8 gender = !mode;
910 int ret;
911
912 if ((mode != 0) && (mode != 1))
913 return -EINVAL;
914 mutex_lock(&data->mutex);
915 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
916 &data->conf.filter, gender,
917 MMA9553_MASK_CONF_MALE);
918 mutex_unlock(&data->mutex);
919
920 return ret;
921}
922
923static const struct iio_event_spec mma9553_step_event = {
924 .type = IIO_EV_TYPE_CHANGE,
925 .dir = IIO_EV_DIR_NONE,
926 .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
927};
928
929static const struct iio_event_spec mma9553_activity_events[] = {
930 {
931 .type = IIO_EV_TYPE_THRESH,
932 .dir = IIO_EV_DIR_RISING,
933 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
934 BIT(IIO_EV_INFO_VALUE) |
935 BIT(IIO_EV_INFO_PERIOD),
936 },
937 {
938 .type = IIO_EV_TYPE_THRESH,
939 .dir = IIO_EV_DIR_FALLING,
940 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
941 BIT(IIO_EV_INFO_VALUE) |
942 BIT(IIO_EV_INFO_PERIOD),
943 },
944};
945
946static const char * const calibgender_modes[] = { "male", "female" };
947
948static const struct iio_enum mma9553_calibgender_enum = {
949 .items = calibgender_modes,
950 .num_items = ARRAY_SIZE(calibgender_modes),
951 .get = mma9553_get_calibgender_mode,
952 .set = mma9553_set_calibgender_mode,
953};
954
955static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
956 IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
957 IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
958 {},
959};
960
961#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \
962 .type = _type, \
963 .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \
964 BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
965 _mask, \
966 .ext_info = mma9553_ext_info, \
967}
968
969#define MMA9553_ACTIVITY_CHANNEL(_chan2) { \
970 .type = IIO_ACTIVITY, \
971 .modified = 1, \
972 .channel2 = _chan2, \
973 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
974 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT), \
975 .event_spec = mma9553_activity_events, \
976 .num_event_specs = ARRAY_SIZE(mma9553_activity_events), \
977 .ext_info = mma9553_ext_info, \
978}
979
980static const struct iio_chan_spec mma9553_channels[] = {
981 MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
982 MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
983 MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
984
985 {
986 .type = IIO_STEPS,
987 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
988 BIT(IIO_CHAN_INFO_ENABLE) |
989 BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
990 BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
991 .event_spec = &mma9553_step_event,
992 .num_event_specs = 1,
993 },
994
995 MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
996 {
997 .type = IIO_VELOCITY,
998 .modified = 1,
999 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
1000 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1001 BIT(IIO_CHAN_INFO_SCALE) |
1002 BIT(IIO_CHAN_INFO_INT_TIME) |
1003 BIT(IIO_CHAN_INFO_ENABLE),
1004 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
1005 .ext_info = mma9553_ext_info,
1006 },
1007 MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
1008 BIT(IIO_CHAN_INFO_SCALE) |
1009 BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
1010
1011 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
1012 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
1013 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
1014 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
1015};
1016
1017static const struct iio_info mma9553_info = {
1018 .driver_module = THIS_MODULE,
1019 .read_raw = mma9553_read_raw,
1020 .write_raw = mma9553_write_raw,
1021 .read_event_config = mma9553_read_event_config,
1022 .write_event_config = mma9553_write_event_config,
1023 .read_event_value = mma9553_read_event_value,
1024 .write_event_value = mma9553_write_event_value,
1025};
1026
1027static irqreturn_t mma9553_irq_handler(int irq, void *private)
1028{
1029 struct iio_dev *indio_dev = private;
1030 struct mma9553_data *data = iio_priv(indio_dev);
1031
1032 data->timestamp = iio_get_time_ns();
1033 /*
1034 * Since we only configure the interrupt pin when an
1035 * event is enabled, we are sure we have at least
1036 * one event enabled at this point.
1037 */
1038 return IRQ_WAKE_THREAD;
1039}
1040
1041static irqreturn_t mma9553_event_handler(int irq, void *private)
1042{
1043 struct iio_dev *indio_dev = private;
1044 struct mma9553_data *data = iio_priv(indio_dev);
1045 u16 stepcnt;
1046 u8 activity;
1047 struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1048 int ret;
1049
1050 mutex_lock(&data->mutex);
1051 ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1052 if (ret < 0) {
1053 mutex_unlock(&data->mutex);
1054 return IRQ_HANDLED;
1055 }
1056
1057 ev_prev_activity =
1058 mma9553_get_event(data, IIO_ACTIVITY,
1059 mma9553_activity_to_mod(data->activity),
1060 IIO_EV_DIR_FALLING);
1061 ev_activity =
1062 mma9553_get_event(data, IIO_ACTIVITY,
1063 mma9553_activity_to_mod(activity),
1064 IIO_EV_DIR_RISING);
1065 ev_step_detect =
1066 mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
1067
1068 if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1069 data->stepcnt = stepcnt;
1070 iio_push_event(indio_dev,
1071 IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1072 IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0),
1073 data->timestamp);
1074 }
1075
1076 if (activity != data->activity) {
1077 data->activity = activity;
1078 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1079 if (ev_prev_activity && ev_prev_activity->enabled)
1080 iio_push_event(indio_dev,
1081 IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1082 ev_prev_activity->info->mod,
1083 IIO_EV_DIR_FALLING,
1084 IIO_EV_TYPE_THRESH, 0, 0, 0),
1085 data->timestamp);
1086
1087 if (ev_activity && ev_activity->enabled)
1088 iio_push_event(indio_dev,
1089 IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1090 ev_activity->info->mod,
1091 IIO_EV_DIR_RISING,
1092 IIO_EV_TYPE_THRESH, 0, 0, 0),
1093 data->timestamp);
1094 }
1095 mutex_unlock(&data->mutex);
1096
1097 return IRQ_HANDLED;
1098}
1099
1100static int mma9553_gpio_probe(struct i2c_client *client)
1101{
1102 struct device *dev;
1103 struct gpio_desc *gpio;
1104 int ret;
1105
1106 if (!client)
1107 return -EINVAL;
1108
1109 dev = &client->dev;
1110
1111 /* data ready gpio interrupt pin */
b457f53a 1112 gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
40cb7613
IT		 1113 if (IS_ERR(gpio)) {
1114 dev_err(dev, "acpi gpio get index failed\n");
1115 return PTR_ERR(gpio);
1116 }
1117
40cb7613
IT		 1118 ret = gpiod_to_irq(gpio);
1119
1120 dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1121
1122 return ret;
1123}
1124
1125static const char *mma9553_match_acpi_device(struct device *dev)
1126{
1127 const struct acpi_device_id *id;
1128
1129 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1130 if (!id)
1131 return NULL;
1132
1133 return dev_name(dev);
1134}
1135
1136static int mma9553_probe(struct i2c_client *client,
1137 const struct i2c_device_id *id)
1138{
1139 struct mma9553_data *data;
1140 struct iio_dev *indio_dev;
1141 const char *name = NULL;
1142 int ret;
1143
1144 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1145 if (!indio_dev)
1146 return -ENOMEM;
1147
1148 data = iio_priv(indio_dev);
1149 i2c_set_clientdata(client, indio_dev);
1150 data->client = client;
1151
1152 if (id)
1153 name = id->name;
1154 else if (ACPI_HANDLE(&client->dev))
1155 name = mma9553_match_acpi_device(&client->dev);
1156 else
1157 return -ENOSYS;
1158
1159 mutex_init(&data->mutex);
1160 mma9553_init_events(data);
1161
1162 ret = mma9553_init(data);
1163 if (ret < 0)
1164 return ret;
1165
1166 indio_dev->dev.parent = &client->dev;
1167 indio_dev->channels = mma9553_channels;
1168 indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1169 indio_dev->name = name;
1170 indio_dev->modes = INDIO_DIRECT_MODE;
1171 indio_dev->info = &mma9553_info;
1172
1173 if (client->irq < 0)
1174 client->irq = mma9553_gpio_probe(client);
1175
1176 if (client->irq >= 0) {
1177 ret = devm_request_threaded_irq(&client->dev, client->irq,
1178 mma9553_irq_handler,
1179 mma9553_event_handler,
1180 IRQF_TRIGGER_RISING,
1181 MMA9553_IRQ_NAME, indio_dev);
1182 if (ret < 0) {
1183 dev_err(&client->dev, "request irq %d failed\n",
1184 client->irq);
1185 goto out_poweroff;
1186 }
1187
1188 }
1189
1190 ret = iio_device_register(indio_dev);
1191 if (ret < 0) {
1192 dev_err(&client->dev, "unable to register iio device\n");
1193 goto out_poweroff;
1194 }
1195
1196 ret = pm_runtime_set_active(&client->dev);
1197 if (ret < 0)
1198 goto out_iio_unregister;
1199
1200 pm_runtime_enable(&client->dev);
1201 pm_runtime_set_autosuspend_delay(&client->dev,
1202 MMA9551_AUTO_SUSPEND_DELAY_MS);
1203 pm_runtime_use_autosuspend(&client->dev);
1204
1205 dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1206
1207 return 0;
1208
1209out_iio_unregister:
1210 iio_device_unregister(indio_dev);
1211out_poweroff:
1212 mma9551_set_device_state(client, false);
1213 return ret;
1214}
1215
1216static int mma9553_remove(struct i2c_client *client)
1217{
1218 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1219 struct mma9553_data *data = iio_priv(indio_dev);
1220
1221 pm_runtime_disable(&client->dev);
1222 pm_runtime_set_suspended(&client->dev);
1223 pm_runtime_put_noidle(&client->dev);
1224
1225 iio_device_unregister(indio_dev);
1226 mutex_lock(&data->mutex);
1227 mma9551_set_device_state(data->client, false);
1228 mutex_unlock(&data->mutex);
1229
1230 return 0;
1231}
1232
1233#ifdef CONFIG_PM
1234static int mma9553_runtime_suspend(struct device *dev)
1235{
1236 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1237 struct mma9553_data *data = iio_priv(indio_dev);
1238 int ret;
1239
1240 mutex_lock(&data->mutex);
1241 ret = mma9551_set_device_state(data->client, false);
1242 mutex_unlock(&data->mutex);
1243 if (ret < 0) {
1244 dev_err(&data->client->dev, "powering off device failed\n");
1245 return -EAGAIN;
1246 }
1247
1248 return 0;
1249}
1250
1251static int mma9553_runtime_resume(struct device *dev)
1252{
1253 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1254 struct mma9553_data *data = iio_priv(indio_dev);
1255 int ret;
1256
1257 ret = mma9551_set_device_state(data->client, true);
1258 if (ret < 0)
1259 return ret;
1260
1261 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1262
1263 return 0;
1264}
1265#endif
1266
1267#ifdef CONFIG_PM_SLEEP
1268static int mma9553_suspend(struct device *dev)
1269{
1270 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1271 struct mma9553_data *data = iio_priv(indio_dev);
1272 int ret;
1273
1274 mutex_lock(&data->mutex);
1275 ret = mma9551_set_device_state(data->client, false);
1276 mutex_unlock(&data->mutex);
1277
1278 return ret;
1279}
1280
1281static int mma9553_resume(struct device *dev)
1282{
1283 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1284 struct mma9553_data *data = iio_priv(indio_dev);
1285 int ret;
1286
1287 mutex_lock(&data->mutex);
1288 ret = mma9551_set_device_state(data->client, true);
1289 mutex_unlock(&data->mutex);
1290
1291 return ret;
1292}
1293#endif
1294
1295static const struct dev_pm_ops mma9553_pm_ops = {
1296 SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1297 SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1298 mma9553_runtime_resume, NULL)
1299};
1300
1301static const struct acpi_device_id mma9553_acpi_match[] = {
1302 {"MMA9553", 0},
1303 {},
1304};
1305
1306MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1307
1308static const struct i2c_device_id mma9553_id[] = {
1309 {"mma9553", 0},
1310 {},
1311};
1312
1313MODULE_DEVICE_TABLE(i2c, mma9553_id);
1314
1315static struct i2c_driver mma9553_driver = {
1316 .driver = {
1317 .name = MMA9553_DRV_NAME,
1318 .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1319 .pm = &mma9553_pm_ops,
1320 },
1321 .probe = mma9553_probe,
1322 .remove = mma9553_remove,
1323 .id_table = mma9553_id,
1324};
1325
1326module_i2c_driver(mma9553_driver);
1327
1328MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1329MODULE_LICENSE("GPL v2");
1330MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
Linux kernel - Deliverables
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