xref: /openbmc/linux/drivers/iio/accel/mma9553.c (revision 78700c0a)
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/iio/iio.h>
21 #include <linux/iio/sysfs.h>
22 #include <linux/iio/events.h>
23 #include <linux/pm_runtime.h>
24 #include "mma9551_core.h"
25 
26 #define MMA9553_DRV_NAME			"mma9553"
27 #define MMA9553_IRQ_NAME			"mma9553_event"
28 
29 /* Pedometer configuration registers (R/W) */
30 #define MMA9553_REG_CONF_SLEEPMIN		0x00
31 #define MMA9553_REG_CONF_SLEEPMAX		0x02
32 #define MMA9553_REG_CONF_SLEEPTHD		0x04
33 #define MMA9553_MASK_CONF_WORD			GENMASK(15, 0)
34 
35 #define MMA9553_REG_CONF_CONF_STEPLEN		0x06
36 #define MMA9553_MASK_CONF_CONFIG		BIT(15)
37 #define MMA9553_MASK_CONF_ACT_DBCNTM		BIT(14)
38 #define MMA9553_MASK_CONF_SLP_DBCNTM		BIT(13)
39 #define MMA9553_MASK_CONF_STEPLEN		GENMASK(7, 0)
40 
41 #define MMA9553_REG_CONF_HEIGHT_WEIGHT		0x08
42 #define MMA9553_MASK_CONF_HEIGHT		GENMASK(15, 8)
43 #define MMA9553_MASK_CONF_WEIGHT		GENMASK(7, 0)
44 
45 #define MMA9553_REG_CONF_FILTER			0x0A
46 #define MMA9553_MASK_CONF_FILTSTEP		GENMASK(15, 8)
47 #define MMA9553_MASK_CONF_MALE			BIT(7)
48 #define MMA9553_MASK_CONF_FILTTIME		GENMASK(6, 0)
49 
50 #define MMA9553_REG_CONF_SPEED_STEP		0x0C
51 #define MMA9553_MASK_CONF_SPDPRD		GENMASK(15, 8)
52 #define MMA9553_MASK_CONF_STEPCOALESCE		GENMASK(7, 0)
53 
54 #define MMA9553_REG_CONF_ACTTHD			0x0E
55 #define MMA9553_MAX_ACTTHD			GENMASK(15, 0)
56 
57 /* Pedometer status registers (R-only) */
58 #define MMA9553_REG_STATUS			0x00
59 #define MMA9553_MASK_STATUS_MRGFL		BIT(15)
60 #define MMA9553_MASK_STATUS_SUSPCHG		BIT(14)
61 #define MMA9553_MASK_STATUS_STEPCHG		BIT(13)
62 #define MMA9553_MASK_STATUS_ACTCHG		BIT(12)
63 #define MMA9553_MASK_STATUS_SUSP		BIT(11)
64 #define MMA9553_MASK_STATUS_ACTIVITY		GENMASK(10, 8)
65 #define MMA9553_MASK_STATUS_VERSION		GENMASK(7, 0)
66 
67 #define MMA9553_REG_STEPCNT			0x02
68 #define MMA9553_REG_DISTANCE			0x04
69 #define MMA9553_REG_SPEED			0x06
70 #define MMA9553_REG_CALORIES			0x08
71 #define MMA9553_REG_SLEEPCNT			0x0A
72 
73 /* Pedometer events are always mapped to this pin. */
74 #define MMA9553_DEFAULT_GPIO_PIN	mma9551_gpio6
75 #define MMA9553_DEFAULT_GPIO_POLARITY	0
76 
77 /* Bitnum used for GPIO configuration = bit number in high status byte */
78 #define MMA9553_STATUS_TO_BITNUM(bit)	(ffs(bit) - 9)
79 #define MMA9553_MAX_BITNUM		MMA9553_STATUS_TO_BITNUM(BIT(16))
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  */
103 enum activity_level {
104 	ACTIVITY_UNKNOWN,
105 	ACTIVITY_REST,
106 	ACTIVITY_WALKING,
107 	ACTIVITY_JOGGING,
108 	ACTIVITY_RUNNING,
109 };
110 
111 static 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 
165 struct mma9553_event {
166 	struct mma9553_event_info *info;
167 	bool enabled;
168 };
169 
170 struct 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 
181 struct mma9553_data {
182 	struct i2c_client *client;
183 	/*
184 	 * 1. Serialize access to HW (requested by mma9551_core API).
185 	 * 2. Serialize sequences that power on/off the device and access HW.
186 	 */
187 	struct mutex mutex;
188 	struct mma9553_conf_regs conf;
189 	struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
190 	int num_events;
191 	u8 gpio_bitnum;
192 	/*
193 	 * This is used for all features that depend on step count:
194 	 * step count, distance, speed, calories.
195 	 */
196 	bool stepcnt_enabled;
197 	u16 stepcnt;
198 	u8 activity;
199 	s64 timestamp;
200 };
201 
202 static u8 mma9553_get_bits(u16 val, u16 mask)
203 {
204 	return (val & mask) >> (ffs(mask) - 1);
205 }
206 
207 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
208 {
209 	return (current_val & ~mask) | (val << (ffs(mask) - 1));
210 }
211 
212 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
213 {
214 	switch (activity) {
215 	case ACTIVITY_RUNNING:
216 		return IIO_MOD_RUNNING;
217 	case ACTIVITY_JOGGING:
218 		return IIO_MOD_JOGGING;
219 	case ACTIVITY_WALKING:
220 		return IIO_MOD_WALKING;
221 	case ACTIVITY_REST:
222 		return IIO_MOD_STILL;
223 	case ACTIVITY_UNKNOWN:
224 	default:
225 		return IIO_NO_MOD;
226 	}
227 }
228 
229 static void mma9553_init_events(struct mma9553_data *data)
230 {
231 	int i;
232 
233 	data->num_events = MMA9553_EVENTS_INFO_SIZE;
234 	for (i = 0; i < data->num_events; i++) {
235 		data->events[i].info = &mma9553_events_info[i];
236 		data->events[i].enabled = false;
237 	}
238 }
239 
240 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
241 					       enum iio_chan_type type,
242 					       enum iio_modifier mod,
243 					       enum iio_event_direction dir)
244 {
245 	int i;
246 
247 	for (i = 0; i < data->num_events; i++)
248 		if (data->events[i].info->type == type &&
249 		    data->events[i].info->mod == mod &&
250 		    data->events[i].info->dir == dir)
251 			return &data->events[i];
252 
253 	return NULL;
254 }
255 
256 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
257 					 bool check_type,
258 					 enum iio_chan_type type)
259 {
260 	int i;
261 
262 	for (i = 0; i < data->num_events; i++)
263 		if ((check_type && data->events[i].info->type == type &&
264 		     data->events[i].enabled) ||
265 		     (!check_type && data->events[i].enabled))
266 			return true;
267 
268 	return false;
269 }
270 
271 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
272 			      u16 *p_reg_val, u16 val, u16 mask)
273 {
274 	int ret, retries;
275 	u16 reg_val, config;
276 
277 	reg_val = *p_reg_val;
278 	if (val == mma9553_get_bits(reg_val, mask))
279 		return 0;
280 
281 	reg_val = mma9553_set_bits(reg_val, val, mask);
282 	ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
283 					reg, reg_val);
284 	if (ret < 0) {
285 		dev_err(&data->client->dev,
286 			"error writing config register 0x%x\n", reg);
287 		return ret;
288 	}
289 
290 	*p_reg_val = reg_val;
291 
292 	/* Reinitializes the pedometer with current configuration values */
293 	config = mma9553_set_bits(data->conf.config, 1,
294 				  MMA9553_MASK_CONF_CONFIG);
295 
296 	ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
297 					MMA9553_REG_CONF_CONF_STEPLEN, config);
298 	if (ret < 0) {
299 		dev_err(&data->client->dev,
300 			"error writing config register 0x%x\n",
301 			MMA9553_REG_CONF_CONF_STEPLEN);
302 		return ret;
303 	}
304 
305 	retries = MMA9553_CONFIG_RETRIES;
306 	do {
307 		mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
308 		ret = mma9551_read_config_word(data->client,
309 					       MMA9551_APPID_PEDOMETER,
310 					       MMA9553_REG_CONF_CONF_STEPLEN,
311 					       &config);
312 		if (ret < 0)
313 			return ret;
314 	} while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
315 		 --retries > 0);
316 
317 	return 0;
318 }
319 
320 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
321 					 u8 *activity, u16 *stepcnt)
322 {
323 	u16 buf[2];
324 	int ret;
325 
326 	ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
327 					MMA9553_REG_STATUS, ARRAY_SIZE(buf),
328 					buf);
329 	if (ret < 0) {
330 		dev_err(&data->client->dev,
331 			"error reading status and stepcnt\n");
332 		return ret;
333 	}
334 
335 	*activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
336 	*stepcnt = buf[1];
337 
338 	return 0;
339 }
340 
341 static int mma9553_conf_gpio(struct mma9553_data *data)
342 {
343 	u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
344 	int ret;
345 	struct mma9553_event *ev_step_detect;
346 	bool activity_enabled;
347 
348 	activity_enabled = mma9553_is_any_event_enabled(data, true,
349 							IIO_ACTIVITY);
350 	ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
351 					   IIO_EV_DIR_NONE);
352 
353 	/*
354 	 * If both step detector and activity are enabled, use the MRGFL bit.
355 	 * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
356 	 */
357 	if (activity_enabled && ev_step_detect->enabled)
358 		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
359 	else if (ev_step_detect->enabled)
360 		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
361 	else if (activity_enabled)
362 		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
363 	else			/* Reset */
364 		appid = MMA9551_APPID_NONE;
365 
366 	if (data->gpio_bitnum == bitnum)
367 		return 0;
368 
369 	/* Save initial values for activity and stepcnt */
370 	if (activity_enabled || ev_step_detect->enabled) {
371 		ret = mma9553_read_activity_stepcnt(data, &data->activity,
372 						    &data->stepcnt);
373 		if (ret < 0)
374 			return ret;
375 	}
376 
377 	ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
378 				  bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
379 	if (ret < 0)
380 		return ret;
381 	data->gpio_bitnum = bitnum;
382 
383 	return 0;
384 }
385 
386 static int mma9553_init(struct mma9553_data *data)
387 {
388 	int ret;
389 
390 	ret = mma9551_read_version(data->client);
391 	if (ret)
392 		return ret;
393 
394 	/*
395 	 * Read all the pedometer configuration registers. This is used as
396 	 * a device identification command to differentiate the MMA9553L
397 	 * from the MMA9550L.
398 	 */
399 	ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
400 					MMA9553_REG_CONF_SLEEPMIN,
401 					sizeof(data->conf) / sizeof(u16),
402 					(u16 *)&data->conf);
403 	if (ret < 0) {
404 		dev_err(&data->client->dev,
405 			"failed to read configuration registers\n");
406 		return ret;
407 	}
408 
409 	/* Reset GPIO */
410 	data->gpio_bitnum = MMA9553_MAX_BITNUM;
411 	ret = mma9553_conf_gpio(data);
412 	if (ret < 0)
413 		return ret;
414 
415 	ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
416 	if (ret < 0)
417 		return ret;
418 
419 	/* Init config registers */
420 	data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
421 	data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
422 	data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
423 	data->conf.config = mma9553_set_bits(data->conf.config, 1,
424 					     MMA9553_MASK_CONF_CONFIG);
425 	/*
426 	 * Clear the activity debounce counter when the activity level changes,
427 	 * so that the confidence level applies for any activity level.
428 	 */
429 	data->conf.config = mma9553_set_bits(data->conf.config, 1,
430 					     MMA9553_MASK_CONF_ACT_DBCNTM);
431 	ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
432 					 MMA9553_REG_CONF_SLEEPMIN,
433 					 sizeof(data->conf) / sizeof(u16),
434 					 (u16 *)&data->conf);
435 	if (ret < 0) {
436 		dev_err(&data->client->dev,
437 			"failed to write configuration registers\n");
438 		return ret;
439 	}
440 
441 	return mma9551_set_device_state(data->client, true);
442 }
443 
444 static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
445 				    u16 *tmp)
446 {
447 	bool powered_on;
448 	int ret;
449 
450 	/*
451 	 * The HW only counts steps and other dependent
452 	 * parameters (speed, distance, calories, activity)
453 	 * if power is on (from enabling an event or the
454 	 * step counter).
455 	 */
456 	powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
457 		     data->stepcnt_enabled;
458 	if (!powered_on) {
459 		dev_err(&data->client->dev, "No channels enabled\n");
460 		return -EINVAL;
461 	}
462 
463 	mutex_lock(&data->mutex);
464 	ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
465 				       reg, tmp);
466 	mutex_unlock(&data->mutex);
467 	return ret;
468 }
469 
470 static int mma9553_read_raw(struct iio_dev *indio_dev,
471 			    struct iio_chan_spec const *chan,
472 			    int *val, int *val2, long mask)
473 {
474 	struct mma9553_data *data = iio_priv(indio_dev);
475 	int ret;
476 	u16 tmp;
477 	u8 activity;
478 
479 	switch (mask) {
480 	case IIO_CHAN_INFO_PROCESSED:
481 		switch (chan->type) {
482 		case IIO_STEPS:
483 			ret = mma9553_read_status_word(data,
484 						       MMA9553_REG_STEPCNT,
485 						       &tmp);
486 			if (ret < 0)
487 				return ret;
488 			*val = tmp;
489 			return IIO_VAL_INT;
490 		case IIO_DISTANCE:
491 			ret = mma9553_read_status_word(data,
492 						       MMA9553_REG_DISTANCE,
493 						       &tmp);
494 			if (ret < 0)
495 				return ret;
496 			*val = tmp;
497 			return IIO_VAL_INT;
498 		case IIO_ACTIVITY:
499 			ret = mma9553_read_status_word(data,
500 						       MMA9553_REG_STATUS,
501 						       &tmp);
502 			if (ret < 0)
503 				return ret;
504 
505 			activity =
506 			    mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
507 
508 			/*
509 			 * The device does not support confidence value levels,
510 			 * so we will always have 100% for current activity and
511 			 * 0% for the others.
512 			 */
513 			if (chan->channel2 == mma9553_activity_to_mod(activity))
514 				*val = 100;
515 			else
516 				*val = 0;
517 			return IIO_VAL_INT;
518 		default:
519 			return -EINVAL;
520 		}
521 	case IIO_CHAN_INFO_RAW:
522 		switch (chan->type) {
523 		case IIO_VELOCITY:	/* m/h */
524 			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
525 				return -EINVAL;
526 			ret = mma9553_read_status_word(data,
527 						       MMA9553_REG_SPEED,
528 						       &tmp);
529 			if (ret < 0)
530 				return ret;
531 			*val = tmp;
532 			return IIO_VAL_INT;
533 		case IIO_ENERGY:	/* Cal or kcal */
534 			ret = mma9553_read_status_word(data,
535 						       MMA9553_REG_CALORIES,
536 						       &tmp);
537 			if (ret < 0)
538 				return ret;
539 			*val = tmp;
540 			return IIO_VAL_INT;
541 		case IIO_ACCEL:
542 			mutex_lock(&data->mutex);
543 			ret = mma9551_read_accel_chan(data->client,
544 						      chan, val, val2);
545 			mutex_unlock(&data->mutex);
546 			return ret;
547 		default:
548 			return -EINVAL;
549 		}
550 	case IIO_CHAN_INFO_SCALE:
551 		switch (chan->type) {
552 		case IIO_VELOCITY:	/* m/h to m/s */
553 			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
554 				return -EINVAL;
555 			*val = 0;
556 			*val2 = 277;	/* 0.000277 */
557 			return IIO_VAL_INT_PLUS_MICRO;
558 		case IIO_ENERGY:	/* Cal or kcal to J */
559 			*val = 4184;
560 			return IIO_VAL_INT;
561 		case IIO_ACCEL:
562 			return mma9551_read_accel_scale(val, val2);
563 		default:
564 			return -EINVAL;
565 		}
566 	case IIO_CHAN_INFO_ENABLE:
567 		*val = data->stepcnt_enabled;
568 		return IIO_VAL_INT;
569 	case IIO_CHAN_INFO_CALIBHEIGHT:
570 		tmp = mma9553_get_bits(data->conf.height_weight,
571 				       MMA9553_MASK_CONF_HEIGHT);
572 		*val = tmp / 100;	/* cm to m */
573 		*val2 = (tmp % 100) * 10000;
574 		return IIO_VAL_INT_PLUS_MICRO;
575 	case IIO_CHAN_INFO_CALIBWEIGHT:
576 		*val = mma9553_get_bits(data->conf.height_weight,
577 					MMA9553_MASK_CONF_WEIGHT);
578 		return IIO_VAL_INT;
579 	case IIO_CHAN_INFO_DEBOUNCE_COUNT:
580 		switch (chan->type) {
581 		case IIO_STEPS:
582 			*val = mma9553_get_bits(data->conf.filter,
583 						MMA9553_MASK_CONF_FILTSTEP);
584 			return IIO_VAL_INT;
585 		default:
586 			return -EINVAL;
587 		}
588 	case IIO_CHAN_INFO_DEBOUNCE_TIME:
589 		switch (chan->type) {
590 		case IIO_STEPS:
591 			*val = mma9553_get_bits(data->conf.filter,
592 						MMA9553_MASK_CONF_FILTTIME);
593 			return IIO_VAL_INT;
594 		default:
595 			return -EINVAL;
596 		}
597 	case IIO_CHAN_INFO_INT_TIME:
598 		switch (chan->type) {
599 		case IIO_VELOCITY:
600 			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
601 				return -EINVAL;
602 			*val = mma9553_get_bits(data->conf.speed_step,
603 						MMA9553_MASK_CONF_SPDPRD);
604 			return IIO_VAL_INT;
605 		default:
606 			return -EINVAL;
607 		}
608 	default:
609 		return -EINVAL;
610 	}
611 }
612 
613 static int mma9553_write_raw(struct iio_dev *indio_dev,
614 			     struct iio_chan_spec const *chan,
615 			     int val, int val2, long mask)
616 {
617 	struct mma9553_data *data = iio_priv(indio_dev);
618 	int ret, tmp;
619 
620 	switch (mask) {
621 	case IIO_CHAN_INFO_ENABLE:
622 		if (data->stepcnt_enabled == !!val)
623 			return 0;
624 		mutex_lock(&data->mutex);
625 		ret = mma9551_set_power_state(data->client, val);
626 		if (ret < 0) {
627 			mutex_unlock(&data->mutex);
628 			return ret;
629 		}
630 		data->stepcnt_enabled = val;
631 		mutex_unlock(&data->mutex);
632 		return 0;
633 	case IIO_CHAN_INFO_CALIBHEIGHT:
634 		/* m to cm */
635 		tmp = val * 100 + val2 / 10000;
636 		if (tmp < 0 || tmp > 255)
637 			return -EINVAL;
638 		mutex_lock(&data->mutex);
639 		ret = mma9553_set_config(data,
640 					 MMA9553_REG_CONF_HEIGHT_WEIGHT,
641 					 &data->conf.height_weight,
642 					 tmp, MMA9553_MASK_CONF_HEIGHT);
643 		mutex_unlock(&data->mutex);
644 		return ret;
645 	case IIO_CHAN_INFO_CALIBWEIGHT:
646 		if (val < 0 || val > 255)
647 			return -EINVAL;
648 		mutex_lock(&data->mutex);
649 		ret = mma9553_set_config(data,
650 					 MMA9553_REG_CONF_HEIGHT_WEIGHT,
651 					 &data->conf.height_weight,
652 					 val, MMA9553_MASK_CONF_WEIGHT);
653 		mutex_unlock(&data->mutex);
654 		return ret;
655 	case IIO_CHAN_INFO_DEBOUNCE_COUNT:
656 		switch (chan->type) {
657 		case IIO_STEPS:
658 			/*
659 			 * Set to 0 to disable step filtering. If the value
660 			 * specified is greater than 6, then 6 will be used.
661 			 */
662 			if (val < 0)
663 				return -EINVAL;
664 			if (val > 6)
665 				val = 6;
666 			mutex_lock(&data->mutex);
667 			ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
668 						 &data->conf.filter, val,
669 						 MMA9553_MASK_CONF_FILTSTEP);
670 			mutex_unlock(&data->mutex);
671 			return ret;
672 		default:
673 			return -EINVAL;
674 		}
675 	case IIO_CHAN_INFO_DEBOUNCE_TIME:
676 		switch (chan->type) {
677 		case IIO_STEPS:
678 			if (val < 0 || val > 127)
679 				return -EINVAL;
680 			mutex_lock(&data->mutex);
681 			ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
682 						 &data->conf.filter, val,
683 						 MMA9553_MASK_CONF_FILTTIME);
684 			mutex_unlock(&data->mutex);
685 			return ret;
686 		default:
687 			return -EINVAL;
688 		}
689 	case IIO_CHAN_INFO_INT_TIME:
690 		switch (chan->type) {
691 		case IIO_VELOCITY:
692 			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
693 				return -EINVAL;
694 			/*
695 			 * If set to a value greater than 5, then 5 will be
696 			 * used. Warning: Do not set SPDPRD to 0 or 1 as
697 			 * this may cause undesirable behavior.
698 			 */
699 			if (val < 2)
700 				return -EINVAL;
701 			if (val > 5)
702 				val = 5;
703 			mutex_lock(&data->mutex);
704 			ret = mma9553_set_config(data,
705 						 MMA9553_REG_CONF_SPEED_STEP,
706 						 &data->conf.speed_step, val,
707 						 MMA9553_MASK_CONF_SPDPRD);
708 			mutex_unlock(&data->mutex);
709 			return ret;
710 		default:
711 			return -EINVAL;
712 		}
713 	default:
714 		return -EINVAL;
715 	}
716 }
717 
718 static int mma9553_read_event_config(struct iio_dev *indio_dev,
719 				     const struct iio_chan_spec *chan,
720 				     enum iio_event_type type,
721 				     enum iio_event_direction dir)
722 {
723 	struct mma9553_data *data = iio_priv(indio_dev);
724 	struct mma9553_event *event;
725 
726 	event = mma9553_get_event(data, chan->type, chan->channel2, dir);
727 	if (!event)
728 		return -EINVAL;
729 
730 	return event->enabled;
731 }
732 
733 static int mma9553_write_event_config(struct iio_dev *indio_dev,
734 				      const struct iio_chan_spec *chan,
735 				      enum iio_event_type type,
736 				      enum iio_event_direction dir, int state)
737 {
738 	struct mma9553_data *data = iio_priv(indio_dev);
739 	struct mma9553_event *event;
740 	int ret;
741 
742 	event = mma9553_get_event(data, chan->type, chan->channel2, dir);
743 	if (!event)
744 		return -EINVAL;
745 
746 	if (event->enabled == state)
747 		return 0;
748 
749 	mutex_lock(&data->mutex);
750 
751 	ret = mma9551_set_power_state(data->client, state);
752 	if (ret < 0)
753 		goto err_out;
754 	event->enabled = state;
755 
756 	ret = mma9553_conf_gpio(data);
757 	if (ret < 0)
758 		goto err_conf_gpio;
759 
760 	mutex_unlock(&data->mutex);
761 
762 	return 0;
763 
764 err_conf_gpio:
765 	if (state) {
766 		event->enabled = false;
767 		mma9551_set_power_state(data->client, false);
768 	}
769 err_out:
770 	mutex_unlock(&data->mutex);
771 	return ret;
772 }
773 
774 static int mma9553_read_event_value(struct iio_dev *indio_dev,
775 				    const struct iio_chan_spec *chan,
776 				    enum iio_event_type type,
777 				    enum iio_event_direction dir,
778 				    enum iio_event_info info,
779 				    int *val, int *val2)
780 {
781 	struct mma9553_data *data = iio_priv(indio_dev);
782 
783 	*val2 = 0;
784 	switch (info) {
785 	case IIO_EV_INFO_VALUE:
786 		switch (chan->type) {
787 		case IIO_STEPS:
788 			*val = mma9553_get_bits(data->conf.speed_step,
789 						MMA9553_MASK_CONF_STEPCOALESCE);
790 			return IIO_VAL_INT;
791 		case IIO_ACTIVITY:
792 			/*
793 			 * The device does not support confidence value levels.
794 			 * We set an average of 50%.
795 			 */
796 			*val = 50;
797 			return IIO_VAL_INT;
798 		default:
799 			return -EINVAL;
800 		}
801 	case IIO_EV_INFO_PERIOD:
802 		switch (chan->type) {
803 		case IIO_ACTIVITY:
804 			*val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
805 			return IIO_VAL_INT;
806 		default:
807 			return -EINVAL;
808 		}
809 	default:
810 		return -EINVAL;
811 	}
812 }
813 
814 static int mma9553_write_event_value(struct iio_dev *indio_dev,
815 				     const struct iio_chan_spec *chan,
816 				     enum iio_event_type type,
817 				     enum iio_event_direction dir,
818 				     enum iio_event_info info,
819 				     int val, int val2)
820 {
821 	struct mma9553_data *data = iio_priv(indio_dev);
822 	int ret;
823 
824 	switch (info) {
825 	case IIO_EV_INFO_VALUE:
826 		switch (chan->type) {
827 		case IIO_STEPS:
828 			if (val < 0 || val > 255)
829 				return -EINVAL;
830 			mutex_lock(&data->mutex);
831 			ret = mma9553_set_config(data,
832 						MMA9553_REG_CONF_SPEED_STEP,
833 						&data->conf.speed_step, val,
834 						MMA9553_MASK_CONF_STEPCOALESCE);
835 			mutex_unlock(&data->mutex);
836 			return ret;
837 		default:
838 			return -EINVAL;
839 		}
840 	case IIO_EV_INFO_PERIOD:
841 		switch (chan->type) {
842 		case IIO_ACTIVITY:
843 			if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
844 			    MMA9553_MAX_ACTTHD))
845 				return -EINVAL;
846 			mutex_lock(&data->mutex);
847 			ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
848 						 &data->conf.actthd,
849 						 MMA9553_ACTIVITY_SEC_TO_THD
850 						 (val), MMA9553_MASK_CONF_WORD);
851 			mutex_unlock(&data->mutex);
852 			return ret;
853 		default:
854 			return -EINVAL;
855 		}
856 	default:
857 		return -EINVAL;
858 	}
859 }
860 
861 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
862 					const struct iio_chan_spec *chan)
863 {
864 	struct mma9553_data *data = iio_priv(indio_dev);
865 	u8 gender;
866 
867 	gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
868 	/*
869 	 * HW expects 0 for female and 1 for male,
870 	 * while iio index is 0 for male and 1 for female.
871 	 */
872 	return !gender;
873 }
874 
875 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
876 					const struct iio_chan_spec *chan,
877 					unsigned int mode)
878 {
879 	struct mma9553_data *data = iio_priv(indio_dev);
880 	u8 gender = !mode;
881 	int ret;
882 
883 	if ((mode != 0) && (mode != 1))
884 		return -EINVAL;
885 	mutex_lock(&data->mutex);
886 	ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
887 				 &data->conf.filter, gender,
888 				 MMA9553_MASK_CONF_MALE);
889 	mutex_unlock(&data->mutex);
890 
891 	return ret;
892 }
893 
894 static const struct iio_event_spec mma9553_step_event = {
895 	.type = IIO_EV_TYPE_CHANGE,
896 	.dir = IIO_EV_DIR_NONE,
897 	.mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
898 };
899 
900 static const struct iio_event_spec mma9553_activity_events[] = {
901 	{
902 		.type = IIO_EV_TYPE_THRESH,
903 		.dir = IIO_EV_DIR_RISING,
904 		.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
905 				 BIT(IIO_EV_INFO_VALUE) |
906 				 BIT(IIO_EV_INFO_PERIOD),
907 	 },
908 	{
909 		.type = IIO_EV_TYPE_THRESH,
910 		.dir = IIO_EV_DIR_FALLING,
911 		.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
912 				 BIT(IIO_EV_INFO_VALUE) |
913 				 BIT(IIO_EV_INFO_PERIOD),
914 	},
915 };
916 
917 static const char * const mma9553_calibgender_modes[] = { "male", "female" };
918 
919 static const struct iio_enum mma9553_calibgender_enum = {
920 	.items = mma9553_calibgender_modes,
921 	.num_items = ARRAY_SIZE(mma9553_calibgender_modes),
922 	.get = mma9553_get_calibgender_mode,
923 	.set = mma9553_set_calibgender_mode,
924 };
925 
926 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
927 	IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
928 	IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
929 	{},
930 };
931 
932 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {		\
933 	.type = _type,						\
934 	.info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |	\
935 			      BIT(IIO_CHAN_INFO_CALIBHEIGHT) |	\
936 			      _mask,				\
937 	.ext_info = mma9553_ext_info,				\
938 }
939 
940 #define MMA9553_ACTIVITY_CHANNEL(_chan2) {				\
941 	.type = IIO_ACTIVITY,						\
942 	.modified = 1,							\
943 	.channel2 = _chan2,						\
944 	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),		\
945 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) |	\
946 				    BIT(IIO_CHAN_INFO_ENABLE),		\
947 	.event_spec = mma9553_activity_events,				\
948 	.num_event_specs = ARRAY_SIZE(mma9553_activity_events),		\
949 	.ext_info = mma9553_ext_info,					\
950 }
951 
952 static const struct iio_chan_spec mma9553_channels[] = {
953 	MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
954 	MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
955 	MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
956 
957 	{
958 		.type = IIO_STEPS,
959 		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
960 				     BIT(IIO_CHAN_INFO_ENABLE) |
961 				     BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
962 				     BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
963 		.event_spec = &mma9553_step_event,
964 		.num_event_specs = 1,
965 	},
966 
967 	MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
968 	{
969 		.type = IIO_VELOCITY,
970 		.modified = 1,
971 		.channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
972 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
973 				      BIT(IIO_CHAN_INFO_SCALE) |
974 				      BIT(IIO_CHAN_INFO_INT_TIME) |
975 				      BIT(IIO_CHAN_INFO_ENABLE),
976 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
977 		.ext_info = mma9553_ext_info,
978 	},
979 	MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
980 				  BIT(IIO_CHAN_INFO_SCALE) |
981 				  BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
982 
983 	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
984 	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
985 	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
986 	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
987 };
988 
989 static const struct iio_info mma9553_info = {
990 	.driver_module = THIS_MODULE,
991 	.read_raw = mma9553_read_raw,
992 	.write_raw = mma9553_write_raw,
993 	.read_event_config = mma9553_read_event_config,
994 	.write_event_config = mma9553_write_event_config,
995 	.read_event_value = mma9553_read_event_value,
996 	.write_event_value = mma9553_write_event_value,
997 };
998 
999 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1000 {
1001 	struct iio_dev *indio_dev = private;
1002 	struct mma9553_data *data = iio_priv(indio_dev);
1003 
1004 	data->timestamp = iio_get_time_ns();
1005 	/*
1006 	 * Since we only configure the interrupt pin when an
1007 	 * event is enabled, we are sure we have at least
1008 	 * one event enabled at this point.
1009 	 */
1010 	return IRQ_WAKE_THREAD;
1011 }
1012 
1013 static irqreturn_t mma9553_event_handler(int irq, void *private)
1014 {
1015 	struct iio_dev *indio_dev = private;
1016 	struct mma9553_data *data = iio_priv(indio_dev);
1017 	u16 stepcnt;
1018 	u8 activity;
1019 	struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1020 	int ret;
1021 
1022 	mutex_lock(&data->mutex);
1023 	ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1024 	if (ret < 0) {
1025 		mutex_unlock(&data->mutex);
1026 		return IRQ_HANDLED;
1027 	}
1028 
1029 	ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1030 					     mma9553_activity_to_mod(
1031 					     data->activity),
1032 					     IIO_EV_DIR_FALLING);
1033 	ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1034 					mma9553_activity_to_mod(activity),
1035 					IIO_EV_DIR_RISING);
1036 	ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
1037 					   IIO_EV_DIR_NONE);
1038 
1039 	if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1040 		data->stepcnt = stepcnt;
1041 		iio_push_event(indio_dev,
1042 			       IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1043 					      IIO_EV_DIR_NONE,
1044 					      IIO_EV_TYPE_CHANGE, 0, 0, 0),
1045 			       data->timestamp);
1046 	}
1047 
1048 	if (activity != data->activity) {
1049 		data->activity = activity;
1050 		/* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1051 		if (ev_prev_activity && ev_prev_activity->enabled)
1052 			iio_push_event(indio_dev,
1053 				       IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1054 						    ev_prev_activity->info->mod,
1055 						    IIO_EV_DIR_FALLING,
1056 						    IIO_EV_TYPE_THRESH, 0, 0,
1057 						    0),
1058 				       data->timestamp);
1059 
1060 		if (ev_activity && ev_activity->enabled)
1061 			iio_push_event(indio_dev,
1062 				       IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1063 						      ev_activity->info->mod,
1064 						      IIO_EV_DIR_RISING,
1065 						      IIO_EV_TYPE_THRESH, 0, 0,
1066 						      0),
1067 				       data->timestamp);
1068 	}
1069 	mutex_unlock(&data->mutex);
1070 
1071 	return IRQ_HANDLED;
1072 }
1073 
1074 static const char *mma9553_match_acpi_device(struct device *dev)
1075 {
1076 	const struct acpi_device_id *id;
1077 
1078 	id = acpi_match_device(dev->driver->acpi_match_table, dev);
1079 	if (!id)
1080 		return NULL;
1081 
1082 	return dev_name(dev);
1083 }
1084 
1085 static int mma9553_probe(struct i2c_client *client,
1086 			 const struct i2c_device_id *id)
1087 {
1088 	struct mma9553_data *data;
1089 	struct iio_dev *indio_dev;
1090 	const char *name = NULL;
1091 	int ret;
1092 
1093 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1094 	if (!indio_dev)
1095 		return -ENOMEM;
1096 
1097 	data = iio_priv(indio_dev);
1098 	i2c_set_clientdata(client, indio_dev);
1099 	data->client = client;
1100 
1101 	if (id)
1102 		name = id->name;
1103 	else if (ACPI_HANDLE(&client->dev))
1104 		name = mma9553_match_acpi_device(&client->dev);
1105 	else
1106 		return -ENOSYS;
1107 
1108 	mutex_init(&data->mutex);
1109 	mma9553_init_events(data);
1110 
1111 	ret = mma9553_init(data);
1112 	if (ret < 0)
1113 		return ret;
1114 
1115 	indio_dev->dev.parent = &client->dev;
1116 	indio_dev->channels = mma9553_channels;
1117 	indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1118 	indio_dev->name = name;
1119 	indio_dev->modes = INDIO_DIRECT_MODE;
1120 	indio_dev->info = &mma9553_info;
1121 
1122 	if (client->irq > 0) {
1123 		ret = devm_request_threaded_irq(&client->dev, client->irq,
1124 						mma9553_irq_handler,
1125 						mma9553_event_handler,
1126 						IRQF_TRIGGER_RISING,
1127 						MMA9553_IRQ_NAME, indio_dev);
1128 		if (ret < 0) {
1129 			dev_err(&client->dev, "request irq %d failed\n",
1130 				client->irq);
1131 			goto out_poweroff;
1132 		}
1133 	}
1134 
1135 	ret = pm_runtime_set_active(&client->dev);
1136 	if (ret < 0)
1137 		goto out_poweroff;
1138 
1139 	pm_runtime_enable(&client->dev);
1140 	pm_runtime_set_autosuspend_delay(&client->dev,
1141 					 MMA9551_AUTO_SUSPEND_DELAY_MS);
1142 	pm_runtime_use_autosuspend(&client->dev);
1143 
1144 	ret = iio_device_register(indio_dev);
1145 	if (ret < 0) {
1146 		dev_err(&client->dev, "unable to register iio device\n");
1147 		goto out_poweroff;
1148 	}
1149 
1150 	dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1151 	return 0;
1152 
1153 out_poweroff:
1154 	mma9551_set_device_state(client, false);
1155 	return ret;
1156 }
1157 
1158 static int mma9553_remove(struct i2c_client *client)
1159 {
1160 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
1161 	struct mma9553_data *data = iio_priv(indio_dev);
1162 
1163 	iio_device_unregister(indio_dev);
1164 
1165 	pm_runtime_disable(&client->dev);
1166 	pm_runtime_set_suspended(&client->dev);
1167 	pm_runtime_put_noidle(&client->dev);
1168 
1169 	mutex_lock(&data->mutex);
1170 	mma9551_set_device_state(data->client, false);
1171 	mutex_unlock(&data->mutex);
1172 
1173 	return 0;
1174 }
1175 
1176 #ifdef CONFIG_PM
1177 static int mma9553_runtime_suspend(struct device *dev)
1178 {
1179 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1180 	struct mma9553_data *data = iio_priv(indio_dev);
1181 	int ret;
1182 
1183 	mutex_lock(&data->mutex);
1184 	ret = mma9551_set_device_state(data->client, false);
1185 	mutex_unlock(&data->mutex);
1186 	if (ret < 0) {
1187 		dev_err(&data->client->dev, "powering off device failed\n");
1188 		return -EAGAIN;
1189 	}
1190 
1191 	return 0;
1192 }
1193 
1194 static int mma9553_runtime_resume(struct device *dev)
1195 {
1196 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1197 	struct mma9553_data *data = iio_priv(indio_dev);
1198 	int ret;
1199 
1200 	ret = mma9551_set_device_state(data->client, true);
1201 	if (ret < 0)
1202 		return ret;
1203 
1204 	mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1205 
1206 	return 0;
1207 }
1208 #endif
1209 
1210 #ifdef CONFIG_PM_SLEEP
1211 static int mma9553_suspend(struct device *dev)
1212 {
1213 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1214 	struct mma9553_data *data = iio_priv(indio_dev);
1215 	int ret;
1216 
1217 	mutex_lock(&data->mutex);
1218 	ret = mma9551_set_device_state(data->client, false);
1219 	mutex_unlock(&data->mutex);
1220 
1221 	return ret;
1222 }
1223 
1224 static int mma9553_resume(struct device *dev)
1225 {
1226 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1227 	struct mma9553_data *data = iio_priv(indio_dev);
1228 	int ret;
1229 
1230 	mutex_lock(&data->mutex);
1231 	ret = mma9551_set_device_state(data->client, true);
1232 	mutex_unlock(&data->mutex);
1233 
1234 	return ret;
1235 }
1236 #endif
1237 
1238 static const struct dev_pm_ops mma9553_pm_ops = {
1239 	SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1240 	SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1241 			   mma9553_runtime_resume, NULL)
1242 };
1243 
1244 static const struct acpi_device_id mma9553_acpi_match[] = {
1245 	{"MMA9553", 0},
1246 	{},
1247 };
1248 
1249 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1250 
1251 static const struct i2c_device_id mma9553_id[] = {
1252 	{"mma9553", 0},
1253 	{},
1254 };
1255 
1256 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1257 
1258 static struct i2c_driver mma9553_driver = {
1259 	.driver = {
1260 		   .name = MMA9553_DRV_NAME,
1261 		   .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1262 		   .pm = &mma9553_pm_ops,
1263 		   },
1264 	.probe = mma9553_probe,
1265 	.remove = mma9553_remove,
1266 	.id_table = mma9553_id,
1267 };
1268 
1269 module_i2c_driver(mma9553_driver);
1270 
1271 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1272 MODULE_LICENSE("GPL v2");
1273 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
1274