2 * Freescale MMA9553L Intelligent Pedometer driver
3 * Copyright (c) 2014, Intel Corporation.
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.
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
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"
27 #define MMA9553_DRV_NAME "mma9553"
28 #define MMA9553_IRQ_NAME "mma9553_event"
29 #define MMA9553_GPIO_NAME "mma9553_int"
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)
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)
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)
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)
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)
56 #define MMA9553_REG_CONF_ACTTHD 0x0E
57 #define MMA9553_MAX_ACTTHD GENMASK(15, 0)
59 /* Pedometer status registers (R-only) */
60 #define MMA9553_REG_STATUS 0x00
61 #define MMA9553_MASK_STATUS_MRGFL BIT(15)
62 #define MMA9553_MASK_STATUS_SUSPCHG BIT(14)
63 #define MMA9553_MASK_STATUS_STEPCHG BIT(13)
64 #define MMA9553_MASK_STATUS_ACTCHG BIT(12)
65 #define MMA9553_MASK_STATUS_SUSP BIT(11)
66 #define MMA9553_MASK_STATUS_ACTIVITY GENMASK(10, 8)
67 #define MMA9553_MASK_STATUS_VERSION GENMASK(7, 0)
69 #define MMA9553_REG_STEPCNT 0x02
70 #define MMA9553_REG_DISTANCE 0x04
71 #define MMA9553_REG_SPEED 0x06
72 #define MMA9553_REG_CALORIES 0x08
73 #define MMA9553_REG_SLEEPCNT 0x0A
75 /* Pedometer events are always mapped to this pin. */
76 #define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
77 #define MMA9553_DEFAULT_GPIO_POLARITY 0
79 /* Bitnum used for GPIO configuration = bit number in high status byte */
80 #define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
81 #define MMA9553_MAX_BITNUM MMA9553_STATUS_TO_BITNUM(BIT(16))
83 #define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
86 * The internal activity level must be stable for ACTTHD samples before
87 * ACTIVITY is updated. The ACTIVITY variable contains the current activity
88 * level and is updated every time a step is detected or once a second
89 * if there are no steps.
91 #define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
92 #define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
95 * Autonomously suspend pedometer if acceleration vector magnitude
96 * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
98 #define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */
99 #define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */
100 #define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
102 #define MMA9553_CONFIG_RETRIES 2
104 /* Status register - activity field */
105 enum activity_level {
113 static struct mma9553_event_info {
114 enum iio_chan_type type;
115 enum iio_modifier mod;
116 enum iio_event_direction dir;
117 } mma9553_events_info[] = {
121 .dir = IIO_EV_DIR_NONE,
124 .type = IIO_ACTIVITY,
125 .mod = IIO_MOD_STILL,
126 .dir = IIO_EV_DIR_RISING,
129 .type = IIO_ACTIVITY,
130 .mod = IIO_MOD_STILL,
131 .dir = IIO_EV_DIR_FALLING,
134 .type = IIO_ACTIVITY,
135 .mod = IIO_MOD_WALKING,
136 .dir = IIO_EV_DIR_RISING,
139 .type = IIO_ACTIVITY,
140 .mod = IIO_MOD_WALKING,
141 .dir = IIO_EV_DIR_FALLING,
144 .type = IIO_ACTIVITY,
145 .mod = IIO_MOD_JOGGING,
146 .dir = IIO_EV_DIR_RISING,
149 .type = IIO_ACTIVITY,
150 .mod = IIO_MOD_JOGGING,
151 .dir = IIO_EV_DIR_FALLING,
154 .type = IIO_ACTIVITY,
155 .mod = IIO_MOD_RUNNING,
156 .dir = IIO_EV_DIR_RISING,
159 .type = IIO_ACTIVITY,
160 .mod = IIO_MOD_RUNNING,
161 .dir = IIO_EV_DIR_FALLING,
165 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
167 struct mma9553_event {
168 struct mma9553_event_info *info;
172 struct mma9553_conf_regs {
183 struct mma9553_data {
184 struct i2c_client *client;
186 struct mma9553_conf_regs conf;
187 struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
191 * This is used for all features that depend on step count:
192 * step count, distance, speed, calories.
194 bool stepcnt_enabled;
200 static u8 mma9553_get_bits(u16 val, u16 mask)
202 return (val & mask) >> (ffs(mask) - 1);
205 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
207 return (current_val & ~mask) | (val << (ffs(mask) - 1));
210 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
213 case ACTIVITY_RUNNING:
214 return IIO_MOD_RUNNING;
215 case ACTIVITY_JOGGING:
216 return IIO_MOD_JOGGING;
217 case ACTIVITY_WALKING:
218 return IIO_MOD_WALKING;
220 return IIO_MOD_STILL;
221 case ACTIVITY_UNKNOWN:
227 static void mma9553_init_events(struct mma9553_data *data)
231 data->num_events = MMA9553_EVENTS_INFO_SIZE;
232 for (i = 0; i < data->num_events; i++) {
233 data->events[i].info = &mma9553_events_info[i];
234 data->events[i].enabled = false;
238 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
239 enum iio_chan_type type,
240 enum iio_modifier mod,
241 enum iio_event_direction dir)
245 for (i = 0; i < data->num_events; i++)
246 if (data->events[i].info->type == type &&
247 data->events[i].info->mod == mod &&
248 data->events[i].info->dir == dir)
249 return &data->events[i];
254 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
256 enum iio_chan_type type)
260 for (i = 0; i < data->num_events; i++)
261 if ((check_type && data->events[i].info->type == type &&
262 data->events[i].enabled) ||
263 (!check_type && data->events[i].enabled))
269 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
270 u16 *p_reg_val, u16 val, u16 mask)
275 reg_val = *p_reg_val;
276 if (val == mma9553_get_bits(reg_val, mask))
279 reg_val = mma9553_set_bits(reg_val, val, mask);
280 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
283 dev_err(&data->client->dev,
284 "error writing config register 0x%x\n", reg);
288 *p_reg_val = reg_val;
290 /* Reinitializes the pedometer with current configuration values */
291 config = mma9553_set_bits(data->conf.config, 1,
292 MMA9553_MASK_CONF_CONFIG);
294 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
295 MMA9553_REG_CONF_CONF_STEPLEN, config);
297 dev_err(&data->client->dev,
298 "error writing config register 0x%x\n",
299 MMA9553_REG_CONF_CONF_STEPLEN);
303 retries = MMA9553_CONFIG_RETRIES;
305 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
306 ret = mma9551_read_config_word(data->client,
307 MMA9551_APPID_PEDOMETER,
308 MMA9553_REG_CONF_CONF_STEPLEN,
312 } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
318 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
319 u8 *activity, u16 *stepcnt)
324 ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
325 MMA9553_REG_STATUS, sizeof(u32), buf);
327 dev_err(&data->client->dev,
328 "error reading status and stepcnt\n");
332 *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
338 static int mma9553_conf_gpio(struct mma9553_data *data)
340 u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
342 struct mma9553_event *ev_step_detect;
343 bool activity_enabled;
346 mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
348 mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
351 * If both step detector and activity are enabled, use the MRGFL bit.
352 * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
354 if (activity_enabled && ev_step_detect->enabled)
355 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
356 else if (ev_step_detect->enabled)
357 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
358 else if (activity_enabled)
359 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
361 appid = MMA9551_APPID_NONE;
363 if (data->gpio_bitnum == bitnum)
366 /* Save initial values for activity and stepcnt */
367 if (activity_enabled || ev_step_detect->enabled) {
368 ret = mma9553_read_activity_stepcnt(data, &data->activity,
374 ret = mma9551_gpio_config(data->client,
375 MMA9553_DEFAULT_GPIO_PIN,
376 appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
379 data->gpio_bitnum = bitnum;
384 static int mma9553_init(struct mma9553_data *data)
388 ret = mma9551_read_version(data->client);
393 * Read all the pedometer configuration registers. This is used as
394 * a device identification command to differentiate the MMA9553L
398 mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
399 MMA9553_REG_CONF_SLEEPMIN,
400 sizeof(data->conf), (u16 *) &data->conf);
402 dev_err(&data->client->dev,
403 "failed to read configuration registers\n");
409 data->gpio_bitnum = MMA9553_MAX_BITNUM;
410 ret = mma9553_conf_gpio(data);
414 ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
418 /* Init config registers */
419 data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
420 data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
421 data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
423 mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
425 * Clear the activity debounce counter when the activity level changes,
426 * so that the confidence level applies for any activity level.
428 data->conf.config = mma9553_set_bits(data->conf.config, 1,
429 MMA9553_MASK_CONF_ACT_DBCNTM);
431 mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
432 MMA9553_REG_CONF_SLEEPMIN,
433 sizeof(data->conf), (u16 *) &data->conf);
435 dev_err(&data->client->dev,
436 "failed to write configuration registers\n");
440 return mma9551_set_device_state(data->client, true);
443 static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
450 * The HW only counts steps and other dependent
451 * parameters (speed, distance, calories, activity)
452 * if power is on (from enabling an event or the
455 powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
456 data->stepcnt_enabled;
458 dev_err(&data->client->dev, "No channels enabled\n");
462 mutex_lock(&data->mutex);
463 ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
465 mutex_unlock(&data->mutex);
469 static int mma9553_read_raw(struct iio_dev *indio_dev,
470 struct iio_chan_spec const *chan,
471 int *val, int *val2, long mask)
473 struct mma9553_data *data = iio_priv(indio_dev);
479 case IIO_CHAN_INFO_PROCESSED:
480 switch (chan->type) {
482 ret = mma9553_read_status_word(data,
490 ret = mma9553_read_status_word(data,
491 MMA9553_REG_DISTANCE,
498 ret = mma9553_read_status_word(data,
505 mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
508 * The device does not support confidence value levels,
509 * so we will always have 100% for current activity and
512 if (chan->channel2 == mma9553_activity_to_mod(activity))
520 case IIO_CHAN_INFO_RAW:
521 switch (chan->type) {
522 case IIO_VELOCITY: /* m/h */
523 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
525 ret = mma9553_read_status_word(data,
532 case IIO_ENERGY: /* Cal or kcal */
533 ret = mma9553_read_status_word(data,
534 MMA9553_REG_CALORIES,
541 mutex_lock(&data->mutex);
542 ret = mma9551_read_accel_chan(data->client,
544 mutex_unlock(&data->mutex);
549 case IIO_CHAN_INFO_SCALE:
550 switch (chan->type) {
551 case IIO_VELOCITY: /* m/h to m/s */
552 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
555 *val2 = 277; /* 0.000277 */
556 return IIO_VAL_INT_PLUS_MICRO;
557 case IIO_ENERGY: /* Cal or kcal to J */
561 return mma9551_read_accel_scale(val, val2);
565 case IIO_CHAN_INFO_ENABLE:
566 *val = data->stepcnt_enabled;
568 case IIO_CHAN_INFO_CALIBHEIGHT:
569 tmp = mma9553_get_bits(data->conf.height_weight,
570 MMA9553_MASK_CONF_HEIGHT);
571 *val = tmp / 100; /* cm to m */
572 *val2 = (tmp % 100) * 10000;
573 return IIO_VAL_INT_PLUS_MICRO;
574 case IIO_CHAN_INFO_CALIBWEIGHT:
575 *val = mma9553_get_bits(data->conf.height_weight,
576 MMA9553_MASK_CONF_WEIGHT);
578 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
579 switch (chan->type) {
581 *val = mma9553_get_bits(data->conf.filter,
582 MMA9553_MASK_CONF_FILTSTEP);
587 case IIO_CHAN_INFO_DEBOUNCE_TIME:
588 switch (chan->type) {
590 *val = mma9553_get_bits(data->conf.filter,
591 MMA9553_MASK_CONF_FILTTIME);
596 case IIO_CHAN_INFO_INT_TIME:
597 switch (chan->type) {
599 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
601 *val = mma9553_get_bits(data->conf.speed_step,
602 MMA9553_MASK_CONF_SPDPRD);
612 static int mma9553_write_raw(struct iio_dev *indio_dev,
613 struct iio_chan_spec const *chan,
614 int val, int val2, long mask)
616 struct mma9553_data *data = iio_priv(indio_dev);
620 case IIO_CHAN_INFO_ENABLE:
621 if (data->stepcnt_enabled == !!val)
623 mutex_lock(&data->mutex);
624 ret = mma9551_set_power_state(data->client, val);
626 mutex_unlock(&data->mutex);
629 data->stepcnt_enabled = val;
630 mutex_unlock(&data->mutex);
632 case IIO_CHAN_INFO_CALIBHEIGHT:
634 tmp = val * 100 + val2 / 10000;
635 if (tmp < 0 || tmp > 255)
637 mutex_lock(&data->mutex);
638 ret = mma9553_set_config(data,
639 MMA9553_REG_CONF_HEIGHT_WEIGHT,
640 &data->conf.height_weight,
641 tmp, MMA9553_MASK_CONF_HEIGHT);
642 mutex_unlock(&data->mutex);
644 case IIO_CHAN_INFO_CALIBWEIGHT:
645 if (val < 0 || val > 255)
647 mutex_lock(&data->mutex);
648 ret = mma9553_set_config(data,
649 MMA9553_REG_CONF_HEIGHT_WEIGHT,
650 &data->conf.height_weight,
651 val, MMA9553_MASK_CONF_WEIGHT);
652 mutex_unlock(&data->mutex);
654 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
655 switch (chan->type) {
658 * Set to 0 to disable step filtering. If the value
659 * specified is greater than 6, then 6 will be used.
665 mutex_lock(&data->mutex);
666 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
667 &data->conf.filter, val,
668 MMA9553_MASK_CONF_FILTSTEP);
669 mutex_unlock(&data->mutex);
674 case IIO_CHAN_INFO_DEBOUNCE_TIME:
675 switch (chan->type) {
677 if (val < 0 || val > 127)
679 mutex_lock(&data->mutex);
680 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
681 &data->conf.filter, val,
682 MMA9553_MASK_CONF_FILTTIME);
683 mutex_unlock(&data->mutex);
688 case IIO_CHAN_INFO_INT_TIME:
689 switch (chan->type) {
691 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
694 * If set to a value greater than 5, then 5 will be
695 * used. Warning: Do not set SPDPRD to 0 or 1 as
696 * this may cause undesirable behavior.
702 mutex_lock(&data->mutex);
703 ret = mma9553_set_config(data,
704 MMA9553_REG_CONF_SPEED_STEP,
705 &data->conf.speed_step, val,
706 MMA9553_MASK_CONF_SPDPRD);
707 mutex_unlock(&data->mutex);
717 static int mma9553_read_event_config(struct iio_dev *indio_dev,
718 const struct iio_chan_spec *chan,
719 enum iio_event_type type,
720 enum iio_event_direction dir)
723 struct mma9553_data *data = iio_priv(indio_dev);
724 struct mma9553_event *event;
726 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
730 return event->enabled;
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)
738 struct mma9553_data *data = iio_priv(indio_dev);
739 struct mma9553_event *event;
742 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
746 if (event->enabled == state)
749 mutex_lock(&data->mutex);
751 ret = mma9551_set_power_state(data->client, state);
754 event->enabled = state;
756 ret = mma9553_conf_gpio(data);
760 mutex_unlock(&data->mutex);
766 event->enabled = false;
767 mma9551_set_power_state(data->client, false);
770 mutex_unlock(&data->mutex);
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,
781 struct mma9553_data *data = iio_priv(indio_dev);
785 case IIO_EV_INFO_VALUE:
786 switch (chan->type) {
788 *val = mma9553_get_bits(data->conf.speed_step,
789 MMA9553_MASK_CONF_STEPCOALESCE);
793 * The device does not support confidence value levels.
794 * We set an average of 50%.
801 case IIO_EV_INFO_PERIOD:
802 switch (chan->type) {
804 *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
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,
821 struct mma9553_data *data = iio_priv(indio_dev);
825 case IIO_EV_INFO_VALUE:
826 switch (chan->type) {
828 if (val < 0 || val > 255)
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);
840 case IIO_EV_INFO_PERIOD:
841 switch (chan->type) {
843 if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
846 mutex_lock(&data->mutex);
847 ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
849 MMA9553_ACTIVITY_SEC_TO_THD
850 (val), MMA9553_MASK_CONF_WORD);
851 mutex_unlock(&data->mutex);
861 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
862 const struct iio_chan_spec *chan)
864 struct mma9553_data *data = iio_priv(indio_dev);
867 gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
869 * HW expects 0 for female and 1 for male,
870 * while iio index is 0 for male and 1 for female.
875 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
876 const struct iio_chan_spec *chan,
879 struct mma9553_data *data = iio_priv(indio_dev);
883 if ((mode != 0) && (mode != 1))
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);
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),
900 static const struct iio_event_spec mma9553_activity_events[] = {
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),
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),
917 static const char * const mma9553_calibgender_modes[] = { "male", "female" };
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,
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),
932 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \
934 .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \
935 BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
937 .ext_info = mma9553_ext_info, \
940 #define MMA9553_ACTIVITY_CHANNEL(_chan2) { \
941 .type = IIO_ACTIVITY, \
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, \
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),
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,
967 MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
969 .type = IIO_VELOCITY,
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,
979 MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
980 BIT(IIO_CHAN_INFO_SCALE) |
981 BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
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),
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,
999 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1001 struct iio_dev *indio_dev = private;
1002 struct mma9553_data *data = iio_priv(indio_dev);
1004 data->timestamp = iio_get_time_ns();
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.
1010 return IRQ_WAKE_THREAD;
1013 static irqreturn_t mma9553_event_handler(int irq, void *private)
1015 struct iio_dev *indio_dev = private;
1016 struct mma9553_data *data = iio_priv(indio_dev);
1019 struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1022 mutex_lock(&data->mutex);
1023 ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1025 mutex_unlock(&data->mutex);
1030 mma9553_get_event(data, IIO_ACTIVITY,
1031 mma9553_activity_to_mod(data->activity),
1032 IIO_EV_DIR_FALLING);
1034 mma9553_get_event(data, IIO_ACTIVITY,
1035 mma9553_activity_to_mod(activity),
1038 mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
1040 if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1041 data->stepcnt = stepcnt;
1042 iio_push_event(indio_dev,
1043 IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1044 IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0),
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,
1056 IIO_EV_TYPE_THRESH, 0, 0, 0),
1059 if (ev_activity && ev_activity->enabled)
1060 iio_push_event(indio_dev,
1061 IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1062 ev_activity->info->mod,
1064 IIO_EV_TYPE_THRESH, 0, 0, 0),
1067 mutex_unlock(&data->mutex);
1072 static int mma9553_gpio_probe(struct i2c_client *client)
1075 struct gpio_desc *gpio;
1083 /* data ready GPIO interrupt pin */
1084 gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
1086 dev_err(dev, "ACPI GPIO get index failed\n");
1087 return PTR_ERR(gpio);
1090 ret = gpiod_to_irq(gpio);
1092 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1097 static const char *mma9553_match_acpi_device(struct device *dev)
1099 const struct acpi_device_id *id;
1101 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1105 return dev_name(dev);
1108 static int mma9553_probe(struct i2c_client *client,
1109 const struct i2c_device_id *id)
1111 struct mma9553_data *data;
1112 struct iio_dev *indio_dev;
1113 const char *name = NULL;
1116 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1120 data = iio_priv(indio_dev);
1121 i2c_set_clientdata(client, indio_dev);
1122 data->client = client;
1126 else if (ACPI_HANDLE(&client->dev))
1127 name = mma9553_match_acpi_device(&client->dev);
1131 mutex_init(&data->mutex);
1132 mma9553_init_events(data);
1134 ret = mma9553_init(data);
1138 indio_dev->dev.parent = &client->dev;
1139 indio_dev->channels = mma9553_channels;
1140 indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1141 indio_dev->name = name;
1142 indio_dev->modes = INDIO_DIRECT_MODE;
1143 indio_dev->info = &mma9553_info;
1145 if (client->irq < 0)
1146 client->irq = mma9553_gpio_probe(client);
1148 if (client->irq >= 0) {
1149 ret = devm_request_threaded_irq(&client->dev, client->irq,
1150 mma9553_irq_handler,
1151 mma9553_event_handler,
1152 IRQF_TRIGGER_RISING,
1153 MMA9553_IRQ_NAME, indio_dev);
1155 dev_err(&client->dev, "request irq %d failed\n",
1162 ret = iio_device_register(indio_dev);
1164 dev_err(&client->dev, "unable to register iio device\n");
1168 ret = pm_runtime_set_active(&client->dev);
1170 goto out_iio_unregister;
1172 pm_runtime_enable(&client->dev);
1173 pm_runtime_set_autosuspend_delay(&client->dev,
1174 MMA9551_AUTO_SUSPEND_DELAY_MS);
1175 pm_runtime_use_autosuspend(&client->dev);
1177 dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1182 iio_device_unregister(indio_dev);
1184 mma9551_set_device_state(client, false);
1188 static int mma9553_remove(struct i2c_client *client)
1190 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1191 struct mma9553_data *data = iio_priv(indio_dev);
1193 pm_runtime_disable(&client->dev);
1194 pm_runtime_set_suspended(&client->dev);
1195 pm_runtime_put_noidle(&client->dev);
1197 iio_device_unregister(indio_dev);
1198 mutex_lock(&data->mutex);
1199 mma9551_set_device_state(data->client, false);
1200 mutex_unlock(&data->mutex);
1206 static int mma9553_runtime_suspend(struct device *dev)
1208 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1209 struct mma9553_data *data = iio_priv(indio_dev);
1212 mutex_lock(&data->mutex);
1213 ret = mma9551_set_device_state(data->client, false);
1214 mutex_unlock(&data->mutex);
1216 dev_err(&data->client->dev, "powering off device failed\n");
1223 static int mma9553_runtime_resume(struct device *dev)
1225 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1226 struct mma9553_data *data = iio_priv(indio_dev);
1229 ret = mma9551_set_device_state(data->client, true);
1233 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1239 #ifdef CONFIG_PM_SLEEP
1240 static int mma9553_suspend(struct device *dev)
1242 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1243 struct mma9553_data *data = iio_priv(indio_dev);
1246 mutex_lock(&data->mutex);
1247 ret = mma9551_set_device_state(data->client, false);
1248 mutex_unlock(&data->mutex);
1253 static int mma9553_resume(struct device *dev)
1255 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1256 struct mma9553_data *data = iio_priv(indio_dev);
1259 mutex_lock(&data->mutex);
1260 ret = mma9551_set_device_state(data->client, true);
1261 mutex_unlock(&data->mutex);
1267 static const struct dev_pm_ops mma9553_pm_ops = {
1268 SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1269 SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1270 mma9553_runtime_resume, NULL)
1273 static const struct acpi_device_id mma9553_acpi_match[] = {
1278 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1280 static const struct i2c_device_id mma9553_id[] = {
1285 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1287 static struct i2c_driver mma9553_driver = {
1289 .name = MMA9553_DRV_NAME,
1290 .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1291 .pm = &mma9553_pm_ops,
1293 .probe = mma9553_probe,
1294 .remove = mma9553_remove,
1295 .id_table = mma9553_id,
1298 module_i2c_driver(mma9553_driver);
1300 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1301 MODULE_LICENSE("GPL v2");
1302 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");