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/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"
26 #define MMA9553_DRV_NAME "mma9553"
27 #define MMA9553_IRQ_NAME "mma9553_event"
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)
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)
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)
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)
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)
54 #define MMA9553_REG_CONF_ACTTHD 0x0E
55 #define MMA9553_MAX_ACTTHD GENMASK(15, 0)
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)
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
73 /* Pedometer events are always mapped to this pin. */
74 #define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
75 #define MMA9553_DEFAULT_GPIO_POLARITY 0
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))
81 #define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
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.
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)
93 * Autonomously suspend pedometer if acceleration vector magnitude
94 * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
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)
100 #define MMA9553_CONFIG_RETRIES 2
102 /* Status register - activity field */
103 enum activity_level
{
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
[] = {
119 .dir
= IIO_EV_DIR_NONE
,
122 .type
= IIO_ACTIVITY
,
123 .mod
= IIO_MOD_STILL
,
124 .dir
= IIO_EV_DIR_RISING
,
127 .type
= IIO_ACTIVITY
,
128 .mod
= IIO_MOD_STILL
,
129 .dir
= IIO_EV_DIR_FALLING
,
132 .type
= IIO_ACTIVITY
,
133 .mod
= IIO_MOD_WALKING
,
134 .dir
= IIO_EV_DIR_RISING
,
137 .type
= IIO_ACTIVITY
,
138 .mod
= IIO_MOD_WALKING
,
139 .dir
= IIO_EV_DIR_FALLING
,
142 .type
= IIO_ACTIVITY
,
143 .mod
= IIO_MOD_JOGGING
,
144 .dir
= IIO_EV_DIR_RISING
,
147 .type
= IIO_ACTIVITY
,
148 .mod
= IIO_MOD_JOGGING
,
149 .dir
= IIO_EV_DIR_FALLING
,
152 .type
= IIO_ACTIVITY
,
153 .mod
= IIO_MOD_RUNNING
,
154 .dir
= IIO_EV_DIR_RISING
,
157 .type
= IIO_ACTIVITY
,
158 .mod
= IIO_MOD_RUNNING
,
159 .dir
= IIO_EV_DIR_FALLING
,
163 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
165 struct mma9553_event
{
166 struct mma9553_event_info
*info
;
170 struct mma9553_conf_regs
{
181 struct mma9553_data
{
182 struct i2c_client
*client
;
184 * 1. Serialize access to HW (requested by mma9551_core API).
185 * 2. Serialize sequences that power on/off the device and access HW.
188 struct mma9553_conf_regs conf
;
189 struct mma9553_event events
[MMA9553_EVENTS_INFO_SIZE
];
193 * This is used for all features that depend on step count:
194 * step count, distance, speed, calories.
196 bool stepcnt_enabled
;
202 static u8
mma9553_get_bits(u16 val
, u16 mask
)
204 return (val
& mask
) >> (ffs(mask
) - 1);
207 static u16
mma9553_set_bits(u16 current_val
, u16 val
, u16 mask
)
209 return (current_val
& ~mask
) | (val
<< (ffs(mask
) - 1));
212 static enum iio_modifier
mma9553_activity_to_mod(enum activity_level 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
;
222 return IIO_MOD_STILL
;
223 case ACTIVITY_UNKNOWN
:
229 static void mma9553_init_events(struct mma9553_data
*data
)
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;
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
)
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
];
256 static bool mma9553_is_any_event_enabled(struct mma9553_data
*data
,
258 enum iio_chan_type type
)
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
))
271 static int mma9553_set_config(struct mma9553_data
*data
, u16 reg
,
272 u16
*p_reg_val
, u16 val
, u16 mask
)
277 reg_val
= *p_reg_val
;
278 if (val
== mma9553_get_bits(reg_val
, mask
))
281 reg_val
= mma9553_set_bits(reg_val
, val
, mask
);
282 ret
= mma9551_write_config_word(data
->client
, MMA9551_APPID_PEDOMETER
,
285 dev_err(&data
->client
->dev
,
286 "error writing config register 0x%x\n", reg
);
290 *p_reg_val
= reg_val
;
292 /* Reinitializes the pedometer with current configuration values */
293 config
= mma9553_set_bits(data
->conf
.config
, 1,
294 MMA9553_MASK_CONF_CONFIG
);
296 ret
= mma9551_write_config_word(data
->client
, MMA9551_APPID_PEDOMETER
,
297 MMA9553_REG_CONF_CONF_STEPLEN
, config
);
299 dev_err(&data
->client
->dev
,
300 "error writing config register 0x%x\n",
301 MMA9553_REG_CONF_CONF_STEPLEN
);
305 retries
= MMA9553_CONFIG_RETRIES
;
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
,
314 } while (mma9553_get_bits(config
, MMA9553_MASK_CONF_CONFIG
) &&
320 static int mma9553_read_activity_stepcnt(struct mma9553_data
*data
,
321 u8
*activity
, u16
*stepcnt
)
326 ret
= mma9551_read_status_words(data
->client
, MMA9551_APPID_PEDOMETER
,
327 MMA9553_REG_STATUS
, ARRAY_SIZE(buf
),
330 dev_err(&data
->client
->dev
,
331 "error reading status and stepcnt\n");
335 *activity
= mma9553_get_bits(buf
[0], MMA9553_MASK_STATUS_ACTIVITY
);
341 static int mma9553_conf_gpio(struct mma9553_data
*data
)
343 u8 bitnum
= 0, appid
= MMA9551_APPID_PEDOMETER
;
345 struct mma9553_event
*ev_step_detect
;
346 bool activity_enabled
;
348 activity_enabled
= mma9553_is_any_event_enabled(data
, true,
350 ev_step_detect
= mma9553_get_event(data
, IIO_STEPS
, IIO_NO_MOD
,
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.
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
);
364 appid
= MMA9551_APPID_NONE
;
366 if (data
->gpio_bitnum
== bitnum
)
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
,
377 ret
= mma9551_gpio_config(data
->client
, MMA9553_DEFAULT_GPIO_PIN
, appid
,
378 bitnum
, MMA9553_DEFAULT_GPIO_POLARITY
);
381 data
->gpio_bitnum
= bitnum
;
386 static int mma9553_init(struct mma9553_data
*data
)
390 ret
= mma9551_read_version(data
->client
);
395 * Read all the pedometer configuration registers. This is used as
396 * a device identification command to differentiate the MMA9553L
399 ret
= mma9551_read_config_words(data
->client
, MMA9551_APPID_PEDOMETER
,
400 MMA9553_REG_CONF_SLEEPMIN
,
401 sizeof(data
->conf
) / sizeof(u16
),
404 dev_err(&data
->client
->dev
,
405 "failed to read configuration registers\n");
410 data
->gpio_bitnum
= MMA9553_MAX_BITNUM
;
411 ret
= mma9553_conf_gpio(data
);
415 ret
= mma9551_app_reset(data
->client
, MMA9551_RSC_PED
);
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
);
426 * Clear the activity debounce counter when the activity level changes,
427 * so that the confidence level applies for any activity level.
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
),
436 dev_err(&data
->client
->dev
,
437 "failed to write configuration registers\n");
441 return mma9551_set_device_state(data
->client
, true);
444 static int mma9553_read_status_word(struct mma9553_data
*data
, u16 reg
,
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
456 powered_on
= mma9553_is_any_event_enabled(data
, false, 0) ||
457 data
->stepcnt_enabled
;
459 dev_err(&data
->client
->dev
, "No channels enabled\n");
463 mutex_lock(&data
->mutex
);
464 ret
= mma9551_read_status_word(data
->client
, MMA9551_APPID_PEDOMETER
,
466 mutex_unlock(&data
->mutex
);
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
)
474 struct mma9553_data
*data
= iio_priv(indio_dev
);
480 case IIO_CHAN_INFO_PROCESSED
:
481 switch (chan
->type
) {
483 ret
= mma9553_read_status_word(data
,
491 ret
= mma9553_read_status_word(data
,
492 MMA9553_REG_DISTANCE
,
499 ret
= mma9553_read_status_word(data
,
506 mma9553_get_bits(tmp
, MMA9553_MASK_STATUS_ACTIVITY
);
509 * The device does not support confidence value levels,
510 * so we will always have 100% for current activity and
513 if (chan
->channel2
== mma9553_activity_to_mod(activity
))
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
)
526 ret
= mma9553_read_status_word(data
,
533 case IIO_ENERGY
: /* Cal or kcal */
534 ret
= mma9553_read_status_word(data
,
535 MMA9553_REG_CALORIES
,
542 mutex_lock(&data
->mutex
);
543 ret
= mma9551_read_accel_chan(data
->client
,
545 mutex_unlock(&data
->mutex
);
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
)
556 *val2
= 277; /* 0.000277 */
557 return IIO_VAL_INT_PLUS_MICRO
;
558 case IIO_ENERGY
: /* Cal or kcal to J */
562 return mma9551_read_accel_scale(val
, val2
);
566 case IIO_CHAN_INFO_ENABLE
:
567 *val
= data
->stepcnt_enabled
;
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
);
579 case IIO_CHAN_INFO_DEBOUNCE_COUNT
:
580 switch (chan
->type
) {
582 *val
= mma9553_get_bits(data
->conf
.filter
,
583 MMA9553_MASK_CONF_FILTSTEP
);
588 case IIO_CHAN_INFO_DEBOUNCE_TIME
:
589 switch (chan
->type
) {
591 *val
= mma9553_get_bits(data
->conf
.filter
,
592 MMA9553_MASK_CONF_FILTTIME
);
597 case IIO_CHAN_INFO_INT_TIME
:
598 switch (chan
->type
) {
600 if (chan
->channel2
!= IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
)
602 *val
= mma9553_get_bits(data
->conf
.speed_step
,
603 MMA9553_MASK_CONF_SPDPRD
);
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
)
617 struct mma9553_data
*data
= iio_priv(indio_dev
);
621 case IIO_CHAN_INFO_ENABLE
:
622 if (data
->stepcnt_enabled
== !!val
)
624 mutex_lock(&data
->mutex
);
625 ret
= mma9551_set_power_state(data
->client
, val
);
627 mutex_unlock(&data
->mutex
);
630 data
->stepcnt_enabled
= val
;
631 mutex_unlock(&data
->mutex
);
633 case IIO_CHAN_INFO_CALIBHEIGHT
:
635 tmp
= val
* 100 + val2
/ 10000;
636 if (tmp
< 0 || tmp
> 255)
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
);
645 case IIO_CHAN_INFO_CALIBWEIGHT
:
646 if (val
< 0 || val
> 255)
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
);
655 case IIO_CHAN_INFO_DEBOUNCE_COUNT
:
656 switch (chan
->type
) {
659 * Set to 0 to disable step filtering. If the value
660 * specified is greater than 6, then 6 will be used.
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
);
675 case IIO_CHAN_INFO_DEBOUNCE_TIME
:
676 switch (chan
->type
) {
678 if (val
< 0 || val
> 127)
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
);
689 case IIO_CHAN_INFO_INT_TIME
:
690 switch (chan
->type
) {
692 if (chan
->channel2
!= IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
)
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.
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
);
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
)
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 .read_raw
= mma9553_read_raw
,
991 .write_raw
= mma9553_write_raw
,
992 .read_event_config
= mma9553_read_event_config
,
993 .write_event_config
= mma9553_write_event_config
,
994 .read_event_value
= mma9553_read_event_value
,
995 .write_event_value
= mma9553_write_event_value
,
998 static irqreturn_t
mma9553_irq_handler(int irq
, void *private)
1000 struct iio_dev
*indio_dev
= private;
1001 struct mma9553_data
*data
= iio_priv(indio_dev
);
1003 data
->timestamp
= iio_get_time_ns(indio_dev
);
1005 * Since we only configure the interrupt pin when an
1006 * event is enabled, we are sure we have at least
1007 * one event enabled at this point.
1009 return IRQ_WAKE_THREAD
;
1012 static irqreturn_t
mma9553_event_handler(int irq
, void *private)
1014 struct iio_dev
*indio_dev
= private;
1015 struct mma9553_data
*data
= iio_priv(indio_dev
);
1018 struct mma9553_event
*ev_activity
, *ev_prev_activity
, *ev_step_detect
;
1021 mutex_lock(&data
->mutex
);
1022 ret
= mma9553_read_activity_stepcnt(data
, &activity
, &stepcnt
);
1024 mutex_unlock(&data
->mutex
);
1028 ev_prev_activity
= mma9553_get_event(data
, IIO_ACTIVITY
,
1029 mma9553_activity_to_mod(
1031 IIO_EV_DIR_FALLING
);
1032 ev_activity
= mma9553_get_event(data
, IIO_ACTIVITY
,
1033 mma9553_activity_to_mod(activity
),
1035 ev_step_detect
= mma9553_get_event(data
, IIO_STEPS
, IIO_NO_MOD
,
1038 if (ev_step_detect
->enabled
&& (stepcnt
!= data
->stepcnt
)) {
1039 data
->stepcnt
= stepcnt
;
1040 iio_push_event(indio_dev
,
1041 IIO_EVENT_CODE(IIO_STEPS
, 0, IIO_NO_MOD
,
1043 IIO_EV_TYPE_CHANGE
, 0, 0, 0),
1047 if (activity
!= data
->activity
) {
1048 data
->activity
= activity
;
1049 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1050 if (ev_prev_activity
&& ev_prev_activity
->enabled
)
1051 iio_push_event(indio_dev
,
1052 IIO_EVENT_CODE(IIO_ACTIVITY
, 0,
1053 ev_prev_activity
->info
->mod
,
1055 IIO_EV_TYPE_THRESH
, 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,
1068 mutex_unlock(&data
->mutex
);
1073 static const char *mma9553_match_acpi_device(struct device
*dev
)
1075 const struct acpi_device_id
*id
;
1077 id
= acpi_match_device(dev
->driver
->acpi_match_table
, dev
);
1081 return dev_name(dev
);
1084 static int mma9553_probe(struct i2c_client
*client
,
1085 const struct i2c_device_id
*id
)
1087 struct mma9553_data
*data
;
1088 struct iio_dev
*indio_dev
;
1089 const char *name
= NULL
;
1092 indio_dev
= devm_iio_device_alloc(&client
->dev
, sizeof(*data
));
1096 data
= iio_priv(indio_dev
);
1097 i2c_set_clientdata(client
, indio_dev
);
1098 data
->client
= client
;
1102 else if (ACPI_HANDLE(&client
->dev
))
1103 name
= mma9553_match_acpi_device(&client
->dev
);
1107 mutex_init(&data
->mutex
);
1108 mma9553_init_events(data
);
1110 ret
= mma9553_init(data
);
1114 indio_dev
->dev
.parent
= &client
->dev
;
1115 indio_dev
->channels
= mma9553_channels
;
1116 indio_dev
->num_channels
= ARRAY_SIZE(mma9553_channels
);
1117 indio_dev
->name
= name
;
1118 indio_dev
->modes
= INDIO_DIRECT_MODE
;
1119 indio_dev
->info
= &mma9553_info
;
1121 if (client
->irq
> 0) {
1122 ret
= devm_request_threaded_irq(&client
->dev
, client
->irq
,
1123 mma9553_irq_handler
,
1124 mma9553_event_handler
,
1125 IRQF_TRIGGER_RISING
,
1126 MMA9553_IRQ_NAME
, indio_dev
);
1128 dev_err(&client
->dev
, "request irq %d failed\n",
1134 ret
= pm_runtime_set_active(&client
->dev
);
1138 pm_runtime_enable(&client
->dev
);
1139 pm_runtime_set_autosuspend_delay(&client
->dev
,
1140 MMA9551_AUTO_SUSPEND_DELAY_MS
);
1141 pm_runtime_use_autosuspend(&client
->dev
);
1143 ret
= iio_device_register(indio_dev
);
1145 dev_err(&client
->dev
, "unable to register iio device\n");
1149 dev_dbg(&indio_dev
->dev
, "Registered device %s\n", name
);
1153 mma9551_set_device_state(client
, false);
1157 static int mma9553_remove(struct i2c_client
*client
)
1159 struct iio_dev
*indio_dev
= i2c_get_clientdata(client
);
1160 struct mma9553_data
*data
= iio_priv(indio_dev
);
1162 iio_device_unregister(indio_dev
);
1164 pm_runtime_disable(&client
->dev
);
1165 pm_runtime_set_suspended(&client
->dev
);
1166 pm_runtime_put_noidle(&client
->dev
);
1168 mutex_lock(&data
->mutex
);
1169 mma9551_set_device_state(data
->client
, false);
1170 mutex_unlock(&data
->mutex
);
1176 static int mma9553_runtime_suspend(struct device
*dev
)
1178 struct iio_dev
*indio_dev
= i2c_get_clientdata(to_i2c_client(dev
));
1179 struct mma9553_data
*data
= iio_priv(indio_dev
);
1182 mutex_lock(&data
->mutex
);
1183 ret
= mma9551_set_device_state(data
->client
, false);
1184 mutex_unlock(&data
->mutex
);
1186 dev_err(&data
->client
->dev
, "powering off device failed\n");
1193 static int mma9553_runtime_resume(struct device
*dev
)
1195 struct iio_dev
*indio_dev
= i2c_get_clientdata(to_i2c_client(dev
));
1196 struct mma9553_data
*data
= iio_priv(indio_dev
);
1199 ret
= mma9551_set_device_state(data
->client
, true);
1203 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE
);
1209 #ifdef CONFIG_PM_SLEEP
1210 static int mma9553_suspend(struct device
*dev
)
1212 struct iio_dev
*indio_dev
= i2c_get_clientdata(to_i2c_client(dev
));
1213 struct mma9553_data
*data
= iio_priv(indio_dev
);
1216 mutex_lock(&data
->mutex
);
1217 ret
= mma9551_set_device_state(data
->client
, false);
1218 mutex_unlock(&data
->mutex
);
1223 static int mma9553_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 mutex_lock(&data
->mutex
);
1230 ret
= mma9551_set_device_state(data
->client
, true);
1231 mutex_unlock(&data
->mutex
);
1237 static const struct dev_pm_ops mma9553_pm_ops
= {
1238 SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend
, mma9553_resume
)
1239 SET_RUNTIME_PM_OPS(mma9553_runtime_suspend
,
1240 mma9553_runtime_resume
, NULL
)
1243 static const struct acpi_device_id mma9553_acpi_match
[] = {
1248 MODULE_DEVICE_TABLE(acpi
, mma9553_acpi_match
);
1250 static const struct i2c_device_id mma9553_id
[] = {
1255 MODULE_DEVICE_TABLE(i2c
, mma9553_id
);
1257 static struct i2c_driver mma9553_driver
= {
1259 .name
= MMA9553_DRV_NAME
,
1260 .acpi_match_table
= ACPI_PTR(mma9553_acpi_match
),
1261 .pm
= &mma9553_pm_ops
,
1263 .probe
= mma9553_probe
,
1264 .remove
= mma9553_remove
,
1265 .id_table
= mma9553_id
,
1268 module_i2c_driver(mma9553_driver
);
1270 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1271 MODULE_LICENSE("GPL v2");
1272 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");