2 * KXCJK-1013 3-axis accelerometer 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/delay.h>
19 #include <linux/bitops.h>
20 #include <linux/slab.h>
21 #include <linux/string.h>
22 #include <linux/acpi.h>
23 #include <linux/gpio/consumer.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/iio/iio.h>
27 #include <linux/iio/sysfs.h>
28 #include <linux/iio/buffer.h>
29 #include <linux/iio/trigger.h>
30 #include <linux/iio/events.h>
31 #include <linux/iio/trigger_consumer.h>
32 #include <linux/iio/triggered_buffer.h>
33 #include <linux/iio/accel/kxcjk_1013.h>
35 #define KXCJK1013_DRV_NAME "kxcjk1013"
36 #define KXCJK1013_IRQ_NAME "kxcjk1013_event"
38 #define KXCJK1013_REG_XOUT_L 0x06
40 * From low byte X axis register, all the other addresses of Y and Z can be
41 * obtained by just applying axis offset. The following axis defines are just
42 * provide clarity, but not used.
44 #define KXCJK1013_REG_XOUT_H 0x07
45 #define KXCJK1013_REG_YOUT_L 0x08
46 #define KXCJK1013_REG_YOUT_H 0x09
47 #define KXCJK1013_REG_ZOUT_L 0x0A
48 #define KXCJK1013_REG_ZOUT_H 0x0B
50 #define KXCJK1013_REG_DCST_RESP 0x0C
51 #define KXCJK1013_REG_WHO_AM_I 0x0F
52 #define KXCJK1013_REG_INT_SRC1 0x16
53 #define KXCJK1013_REG_INT_SRC2 0x17
54 #define KXCJK1013_REG_STATUS_REG 0x18
55 #define KXCJK1013_REG_INT_REL 0x1A
56 #define KXCJK1013_REG_CTRL1 0x1B
57 #define KXCJK1013_REG_CTRL2 0x1D
58 #define KXCJK1013_REG_INT_CTRL1 0x1E
59 #define KXCJK1013_REG_INT_CTRL2 0x1F
60 #define KXCJK1013_REG_DATA_CTRL 0x21
61 #define KXCJK1013_REG_WAKE_TIMER 0x29
62 #define KXCJK1013_REG_SELF_TEST 0x3A
63 #define KXCJK1013_REG_WAKE_THRES 0x6A
65 #define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
66 #define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
67 #define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
68 #define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
69 #define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
70 #define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
71 #define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
72 #define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
74 #define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
75 #define KXCJK1013_MAX_STARTUP_TIME_US 100000
77 #define KXCJK1013_SLEEP_DELAY_MS 2000
79 #define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
80 #define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
81 #define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
82 #define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
83 #define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
84 #define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
86 #define KXCJK1013_DEFAULT_WAKE_THRES 1
92 KX_MAX_CHIPS /* this must be last */
95 struct kxcjk1013_data {
96 struct i2c_client *client;
97 struct iio_trigger *dready_trig;
98 struct iio_trigger *motion_trig;
105 bool active_high_intr;
106 bool dready_trigger_on;
108 bool motion_trigger_on;
110 enum kx_chipset chipset;
113 enum kxcjk1013_axis {
119 enum kxcjk1013_mode {
124 enum kxcjk1013_range {
130 static const struct {
134 } samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
135 {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
136 {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
137 {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
140 /* Refer to section 4 of the specification */
141 static const struct {
144 } odr_start_up_times[KX_MAX_CHIPS][12] = {
192 static const struct {
196 } KXCJK1013_scale_table[] = { {9582, 0, 0},
200 static const struct {
204 } wake_odr_data_rate_table[] = { {0, 781000, 0x00},
217 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
218 enum kxcjk1013_mode mode)
222 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
224 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
229 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
231 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
233 ret = i2c_smbus_write_byte_data(data->client,
234 KXCJK1013_REG_CTRL1, ret);
236 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
243 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
244 enum kxcjk1013_mode *mode)
248 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
250 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
254 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
262 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
266 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
268 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
272 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
273 KXCJK1013_REG_CTRL1_BIT_GSEL1);
274 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
275 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
277 ret = i2c_smbus_write_byte_data(data->client,
281 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
285 data->range = range_index;
290 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
294 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
296 dev_err(&data->client->dev, "Error reading who_am_i\n");
300 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
302 ret = kxcjk1013_set_mode(data, STANDBY);
306 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
308 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
312 /* Set 12 bit mode */
313 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
315 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
318 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
322 /* Setting range to 4G */
323 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
327 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
329 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
333 data->odr_bits = ret;
335 /* Set up INT polarity */
336 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
338 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
342 if (data->active_high_intr)
343 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
345 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
347 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
350 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
354 ret = kxcjk1013_set_mode(data, OPERATION);
358 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
364 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
367 int idx = data->chipset;
369 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
370 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
371 return odr_start_up_times[idx][i].usec;
374 return KXCJK1013_MAX_STARTUP_TIME_US;
378 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
383 ret = pm_runtime_get_sync(&data->client->dev);
385 pm_runtime_mark_last_busy(&data->client->dev);
386 ret = pm_runtime_put_autosuspend(&data->client->dev);
389 dev_err(&data->client->dev,
390 "Failed: kxcjk1013_set_power_state for %d\n", on);
397 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
401 ret = i2c_smbus_write_byte_data(data->client,
402 KXCJK1013_REG_WAKE_TIMER,
405 dev_err(&data->client->dev,
406 "Error writing reg_wake_timer\n");
410 ret = i2c_smbus_write_byte_data(data->client,
411 KXCJK1013_REG_WAKE_THRES,
414 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
421 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
425 enum kxcjk1013_mode store_mode;
427 ret = kxcjk1013_get_mode(data, &store_mode);
431 /* This is requirement by spec to change state to STANDBY */
432 ret = kxcjk1013_set_mode(data, STANDBY);
436 ret = kxcjk1013_chip_update_thresholds(data);
440 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
442 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
447 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
449 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
451 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
454 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
458 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
460 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
465 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
467 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
469 ret = i2c_smbus_write_byte_data(data->client,
470 KXCJK1013_REG_CTRL1, ret);
472 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
476 if (store_mode == OPERATION) {
477 ret = kxcjk1013_set_mode(data, OPERATION);
485 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
489 enum kxcjk1013_mode store_mode;
491 ret = kxcjk1013_get_mode(data, &store_mode);
495 /* This is requirement by spec to change state to STANDBY */
496 ret = kxcjk1013_set_mode(data, STANDBY);
500 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
502 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
507 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
509 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
511 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
514 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
518 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
520 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
525 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
527 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
529 ret = i2c_smbus_write_byte_data(data->client,
530 KXCJK1013_REG_CTRL1, ret);
532 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
536 if (store_mode == OPERATION) {
537 ret = kxcjk1013_set_mode(data, OPERATION);
545 static int kxcjk1013_convert_freq_to_bit(int val, int val2)
549 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
550 if (samp_freq_table[i].val == val &&
551 samp_freq_table[i].val2 == val2) {
552 return samp_freq_table[i].odr_bits;
559 static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
563 for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
564 if (wake_odr_data_rate_table[i].val == val &&
565 wake_odr_data_rate_table[i].val2 == val2) {
566 return wake_odr_data_rate_table[i].odr_bits;
573 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
577 enum kxcjk1013_mode store_mode;
579 ret = kxcjk1013_get_mode(data, &store_mode);
583 odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
587 /* To change ODR, the chip must be set to STANDBY as per spec */
588 ret = kxcjk1013_set_mode(data, STANDBY);
592 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
595 dev_err(&data->client->dev, "Error writing data_ctrl\n");
599 data->odr_bits = odr_bits;
601 odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
605 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
608 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
612 if (store_mode == OPERATION) {
613 ret = kxcjk1013_set_mode(data, OPERATION);
621 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
625 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
626 if (samp_freq_table[i].odr_bits == data->odr_bits) {
627 *val = samp_freq_table[i].val;
628 *val2 = samp_freq_table[i].val2;
629 return IIO_VAL_INT_PLUS_MICRO;
636 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
638 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
641 ret = i2c_smbus_read_word_data(data->client, reg);
643 dev_err(&data->client->dev,
644 "failed to read accel_%c registers\n", 'x' + axis);
651 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
654 enum kxcjk1013_mode store_mode;
657 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
658 if (KXCJK1013_scale_table[i].scale == val) {
660 ret = kxcjk1013_get_mode(data, &store_mode);
664 ret = kxcjk1013_set_mode(data, STANDBY);
668 ret = kxcjk1013_set_range(data, i);
672 if (store_mode == OPERATION) {
673 ret = kxcjk1013_set_mode(data, OPERATION);
685 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
686 struct iio_chan_spec const *chan, int *val,
687 int *val2, long mask)
689 struct kxcjk1013_data *data = iio_priv(indio_dev);
693 case IIO_CHAN_INFO_RAW:
694 mutex_lock(&data->mutex);
695 if (iio_buffer_enabled(indio_dev))
698 ret = kxcjk1013_set_power_state(data, true);
700 mutex_unlock(&data->mutex);
703 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
705 kxcjk1013_set_power_state(data, false);
706 mutex_unlock(&data->mutex);
709 *val = sign_extend32(ret >> 4, 11);
710 ret = kxcjk1013_set_power_state(data, false);
712 mutex_unlock(&data->mutex);
719 case IIO_CHAN_INFO_SCALE:
721 *val2 = KXCJK1013_scale_table[data->range].scale;
722 return IIO_VAL_INT_PLUS_MICRO;
724 case IIO_CHAN_INFO_SAMP_FREQ:
725 mutex_lock(&data->mutex);
726 ret = kxcjk1013_get_odr(data, val, val2);
727 mutex_unlock(&data->mutex);
735 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
736 struct iio_chan_spec const *chan, int val,
739 struct kxcjk1013_data *data = iio_priv(indio_dev);
743 case IIO_CHAN_INFO_SAMP_FREQ:
744 mutex_lock(&data->mutex);
745 ret = kxcjk1013_set_odr(data, val, val2);
746 mutex_unlock(&data->mutex);
748 case IIO_CHAN_INFO_SCALE:
752 mutex_lock(&data->mutex);
753 ret = kxcjk1013_set_scale(data, val2);
754 mutex_unlock(&data->mutex);
763 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
764 const struct iio_chan_spec *chan,
765 enum iio_event_type type,
766 enum iio_event_direction dir,
767 enum iio_event_info info,
770 struct kxcjk1013_data *data = iio_priv(indio_dev);
774 case IIO_EV_INFO_VALUE:
775 *val = data->wake_thres;
777 case IIO_EV_INFO_PERIOD:
778 *val = data->wake_dur;
787 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
788 const struct iio_chan_spec *chan,
789 enum iio_event_type type,
790 enum iio_event_direction dir,
791 enum iio_event_info info,
794 struct kxcjk1013_data *data = iio_priv(indio_dev);
796 if (data->ev_enable_state)
800 case IIO_EV_INFO_VALUE:
801 data->wake_thres = val;
803 case IIO_EV_INFO_PERIOD:
804 data->wake_dur = val;
813 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
814 const struct iio_chan_spec *chan,
815 enum iio_event_type type,
816 enum iio_event_direction dir)
819 struct kxcjk1013_data *data = iio_priv(indio_dev);
821 return data->ev_enable_state;
824 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
825 const struct iio_chan_spec *chan,
826 enum iio_event_type type,
827 enum iio_event_direction dir,
830 struct kxcjk1013_data *data = iio_priv(indio_dev);
833 if (state && data->ev_enable_state)
836 mutex_lock(&data->mutex);
838 if (!state && data->motion_trigger_on) {
839 data->ev_enable_state = 0;
840 mutex_unlock(&data->mutex);
845 * We will expect the enable and disable to do operation in
846 * in reverse order. This will happen here anyway as our
847 * resume operation uses sync mode runtime pm calls, the
848 * suspend operation will be delayed by autosuspend delay
849 * So the disable operation will still happen in reverse of
850 * enable operation. When runtime pm is disabled the mode
851 * is always on so sequence doesn't matter
853 ret = kxcjk1013_set_power_state(data, state);
855 mutex_unlock(&data->mutex);
859 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
861 mutex_unlock(&data->mutex);
865 data->ev_enable_state = state;
866 mutex_unlock(&data->mutex);
871 static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
872 struct iio_trigger *trig)
874 struct kxcjk1013_data *data = iio_priv(indio_dev);
876 if (data->dready_trig != trig && data->motion_trig != trig)
882 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
883 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
885 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
887 static struct attribute *kxcjk1013_attributes[] = {
888 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
889 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
893 static const struct attribute_group kxcjk1013_attrs_group = {
894 .attrs = kxcjk1013_attributes,
897 static const struct iio_event_spec kxcjk1013_event = {
898 .type = IIO_EV_TYPE_THRESH,
899 .dir = IIO_EV_DIR_EITHER,
900 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
901 BIT(IIO_EV_INFO_ENABLE) |
902 BIT(IIO_EV_INFO_PERIOD)
905 #define KXCJK1013_CHANNEL(_axis) { \
908 .channel2 = IIO_MOD_##_axis, \
909 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
910 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
911 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
912 .scan_index = AXIS_##_axis, \
918 .endianness = IIO_CPU, \
920 .event_spec = &kxcjk1013_event, \
921 .num_event_specs = 1 \
924 static const struct iio_chan_spec kxcjk1013_channels[] = {
925 KXCJK1013_CHANNEL(X),
926 KXCJK1013_CHANNEL(Y),
927 KXCJK1013_CHANNEL(Z),
928 IIO_CHAN_SOFT_TIMESTAMP(3),
931 static const struct iio_info kxcjk1013_info = {
932 .attrs = &kxcjk1013_attrs_group,
933 .read_raw = kxcjk1013_read_raw,
934 .write_raw = kxcjk1013_write_raw,
935 .read_event_value = kxcjk1013_read_event,
936 .write_event_value = kxcjk1013_write_event,
937 .write_event_config = kxcjk1013_write_event_config,
938 .read_event_config = kxcjk1013_read_event_config,
939 .validate_trigger = kxcjk1013_validate_trigger,
940 .driver_module = THIS_MODULE,
943 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
945 struct iio_poll_func *pf = p;
946 struct iio_dev *indio_dev = pf->indio_dev;
947 struct kxcjk1013_data *data = iio_priv(indio_dev);
950 mutex_lock(&data->mutex);
952 for_each_set_bit(bit, indio_dev->buffer->scan_mask,
953 indio_dev->masklength) {
954 ret = kxcjk1013_get_acc_reg(data, bit);
956 mutex_unlock(&data->mutex);
959 data->buffer[i++] = ret;
961 mutex_unlock(&data->mutex);
963 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
966 iio_trigger_notify_done(indio_dev->trig);
971 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
973 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
974 struct kxcjk1013_data *data = iio_priv(indio_dev);
977 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
979 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
986 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
989 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
990 struct kxcjk1013_data *data = iio_priv(indio_dev);
993 mutex_lock(&data->mutex);
995 if (!state && data->ev_enable_state && data->motion_trigger_on) {
996 data->motion_trigger_on = false;
997 mutex_unlock(&data->mutex);
1001 ret = kxcjk1013_set_power_state(data, state);
1003 mutex_unlock(&data->mutex);
1006 if (data->motion_trig == trig)
1007 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1009 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1011 mutex_unlock(&data->mutex);
1014 if (data->motion_trig == trig)
1015 data->motion_trigger_on = state;
1017 data->dready_trigger_on = state;
1019 mutex_unlock(&data->mutex);
1024 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1025 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1026 .try_reenable = kxcjk1013_trig_try_reen,
1027 .owner = THIS_MODULE,
1030 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1032 struct iio_dev *indio_dev = private;
1033 struct kxcjk1013_data *data = iio_priv(indio_dev);
1036 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1038 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1043 ret = i2c_smbus_read_byte_data(data->client,
1044 KXCJK1013_REG_INT_SRC2);
1046 dev_err(&data->client->dev,
1047 "Error reading reg_int_src2\n");
1051 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1052 iio_push_event(indio_dev,
1053 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1057 IIO_EV_DIR_FALLING),
1059 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1060 iio_push_event(indio_dev,
1061 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1069 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1070 iio_push_event(indio_dev,
1071 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1075 IIO_EV_DIR_FALLING),
1077 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1078 iio_push_event(indio_dev,
1079 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1086 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1087 iio_push_event(indio_dev,
1088 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1092 IIO_EV_DIR_FALLING),
1094 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1095 iio_push_event(indio_dev,
1096 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1105 if (data->dready_trigger_on)
1108 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1110 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1115 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1117 struct iio_dev *indio_dev = private;
1118 struct kxcjk1013_data *data = iio_priv(indio_dev);
1120 data->timestamp = iio_get_time_ns();
1122 if (data->dready_trigger_on)
1123 iio_trigger_poll(data->dready_trig);
1124 else if (data->motion_trigger_on)
1125 iio_trigger_poll(data->motion_trig);
1127 if (data->ev_enable_state)
1128 return IRQ_WAKE_THREAD;
1133 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1134 enum kx_chipset *chipset)
1136 const struct acpi_device_id *id;
1137 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1140 *chipset = (enum kx_chipset)id->driver_data;
1142 return dev_name(dev);
1145 static int kxcjk1013_gpio_probe(struct i2c_client *client,
1146 struct kxcjk1013_data *data)
1149 struct gpio_desc *gpio;
1157 /* data ready gpio interrupt pin */
1158 gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
1160 dev_err(dev, "acpi gpio get index failed\n");
1161 return PTR_ERR(gpio);
1164 ret = gpiod_direction_input(gpio);
1168 ret = gpiod_to_irq(gpio);
1170 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1175 static int kxcjk1013_probe(struct i2c_client *client,
1176 const struct i2c_device_id *id)
1178 struct kxcjk1013_data *data;
1179 struct iio_dev *indio_dev;
1180 struct kxcjk_1013_platform_data *pdata;
1184 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1188 data = iio_priv(indio_dev);
1189 i2c_set_clientdata(client, indio_dev);
1190 data->client = client;
1192 pdata = dev_get_platdata(&client->dev);
1194 data->active_high_intr = pdata->active_high_intr;
1196 data->active_high_intr = true; /* default polarity */
1199 data->chipset = (enum kx_chipset)(id->driver_data);
1201 } else if (ACPI_HANDLE(&client->dev)) {
1202 name = kxcjk1013_match_acpi_device(&client->dev,
1207 ret = kxcjk1013_chip_init(data);
1211 mutex_init(&data->mutex);
1213 indio_dev->dev.parent = &client->dev;
1214 indio_dev->channels = kxcjk1013_channels;
1215 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1216 indio_dev->name = name;
1217 indio_dev->modes = INDIO_DIRECT_MODE;
1218 indio_dev->info = &kxcjk1013_info;
1220 if (client->irq < 0)
1221 client->irq = kxcjk1013_gpio_probe(client, data);
1223 if (client->irq >= 0) {
1224 ret = devm_request_threaded_irq(&client->dev, client->irq,
1225 kxcjk1013_data_rdy_trig_poll,
1226 kxcjk1013_event_handler,
1227 IRQF_TRIGGER_RISING,
1233 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1237 if (!data->dready_trig)
1240 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1241 "%s-any-motion-dev%d",
1244 if (!data->motion_trig)
1247 data->dready_trig->dev.parent = &client->dev;
1248 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1249 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1250 indio_dev->trig = data->dready_trig;
1251 iio_trigger_get(indio_dev->trig);
1252 ret = iio_trigger_register(data->dready_trig);
1256 data->motion_trig->dev.parent = &client->dev;
1257 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1258 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1259 ret = iio_trigger_register(data->motion_trig);
1261 data->motion_trig = NULL;
1262 goto err_trigger_unregister;
1265 ret = iio_triggered_buffer_setup(indio_dev,
1266 &iio_pollfunc_store_time,
1267 kxcjk1013_trigger_handler,
1270 dev_err(&client->dev,
1271 "iio triggered buffer setup failed\n");
1272 goto err_trigger_unregister;
1276 ret = iio_device_register(indio_dev);
1278 dev_err(&client->dev, "unable to register iio device\n");
1279 goto err_buffer_cleanup;
1282 ret = pm_runtime_set_active(&client->dev);
1284 goto err_iio_unregister;
1286 pm_runtime_enable(&client->dev);
1287 pm_runtime_set_autosuspend_delay(&client->dev,
1288 KXCJK1013_SLEEP_DELAY_MS);
1289 pm_runtime_use_autosuspend(&client->dev);
1294 iio_device_unregister(indio_dev);
1296 if (data->dready_trig)
1297 iio_triggered_buffer_cleanup(indio_dev);
1298 err_trigger_unregister:
1299 if (data->dready_trig)
1300 iio_trigger_unregister(data->dready_trig);
1301 if (data->motion_trig)
1302 iio_trigger_unregister(data->motion_trig);
1307 static int kxcjk1013_remove(struct i2c_client *client)
1309 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1310 struct kxcjk1013_data *data = iio_priv(indio_dev);
1312 pm_runtime_disable(&client->dev);
1313 pm_runtime_set_suspended(&client->dev);
1314 pm_runtime_put_noidle(&client->dev);
1316 iio_device_unregister(indio_dev);
1318 if (data->dready_trig) {
1319 iio_triggered_buffer_cleanup(indio_dev);
1320 iio_trigger_unregister(data->dready_trig);
1321 iio_trigger_unregister(data->motion_trig);
1324 mutex_lock(&data->mutex);
1325 kxcjk1013_set_mode(data, STANDBY);
1326 mutex_unlock(&data->mutex);
1331 #ifdef CONFIG_PM_SLEEP
1332 static int kxcjk1013_suspend(struct device *dev)
1334 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1335 struct kxcjk1013_data *data = iio_priv(indio_dev);
1338 mutex_lock(&data->mutex);
1339 ret = kxcjk1013_set_mode(data, STANDBY);
1340 mutex_unlock(&data->mutex);
1345 static int kxcjk1013_resume(struct device *dev)
1347 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1348 struct kxcjk1013_data *data = iio_priv(indio_dev);
1351 mutex_lock(&data->mutex);
1352 /* Check, if the suspend occured while active */
1353 if (data->dready_trigger_on || data->motion_trigger_on ||
1354 data->ev_enable_state)
1355 ret = kxcjk1013_set_mode(data, OPERATION);
1356 mutex_unlock(&data->mutex);
1363 static int kxcjk1013_runtime_suspend(struct device *dev)
1365 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1366 struct kxcjk1013_data *data = iio_priv(indio_dev);
1368 return kxcjk1013_set_mode(data, STANDBY);
1371 static int kxcjk1013_runtime_resume(struct device *dev)
1373 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1374 struct kxcjk1013_data *data = iio_priv(indio_dev);
1378 ret = kxcjk1013_set_mode(data, OPERATION);
1382 sleep_val = kxcjk1013_get_startup_times(data);
1383 if (sleep_val < 20000)
1384 usleep_range(sleep_val, 20000);
1386 msleep_interruptible(sleep_val/1000);
1392 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1393 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1394 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1395 kxcjk1013_runtime_resume, NULL)
1398 static const struct acpi_device_id kx_acpi_match[] = {
1399 {"KXCJ1013", KXCJK1013},
1400 {"KXCJ1008", KXCJ91008},
1401 {"KXTJ1009", KXTJ21009},
1404 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1406 static const struct i2c_device_id kxcjk1013_id[] = {
1407 {"kxcjk1013", KXCJK1013},
1408 {"kxcj91008", KXCJ91008},
1409 {"kxtj21009", KXTJ21009},
1413 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1415 static struct i2c_driver kxcjk1013_driver = {
1417 .name = KXCJK1013_DRV_NAME,
1418 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1419 .pm = &kxcjk1013_pm_ops,
1421 .probe = kxcjk1013_probe,
1422 .remove = kxcjk1013_remove,
1423 .id_table = kxcjk1013_id,
1425 module_i2c_driver(kxcjk1013_driver);
1427 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1428 MODULE_LICENSE("GPL v2");
1429 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");