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;
111 bool is_smo8500_device;
114 enum kxcjk1013_axis {
120 enum kxcjk1013_mode {
125 enum kxcjk1013_range {
131 static const struct {
135 } samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
136 {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
137 {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
138 {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
141 /* Refer to section 4 of the specification */
142 static const struct {
145 } odr_start_up_times[KX_MAX_CHIPS][12] = {
193 static const struct {
197 } KXCJK1013_scale_table[] = { {9582, 0, 0},
201 static const struct {
205 } wake_odr_data_rate_table[] = { {0, 781000, 0x00},
218 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
219 enum kxcjk1013_mode mode)
223 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
225 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
230 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
232 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
234 ret = i2c_smbus_write_byte_data(data->client,
235 KXCJK1013_REG_CTRL1, ret);
237 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
244 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
245 enum kxcjk1013_mode *mode)
249 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
251 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
255 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
263 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
267 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
269 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
273 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
274 KXCJK1013_REG_CTRL1_BIT_GSEL1);
275 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
276 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
278 ret = i2c_smbus_write_byte_data(data->client,
282 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
286 data->range = range_index;
291 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
295 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
297 dev_err(&data->client->dev, "Error reading who_am_i\n");
301 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
303 ret = kxcjk1013_set_mode(data, STANDBY);
307 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
309 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
313 /* Set 12 bit mode */
314 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
316 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
319 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
323 /* Setting range to 4G */
324 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
328 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
330 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
334 data->odr_bits = ret;
336 /* Set up INT polarity */
337 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
339 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
343 if (data->active_high_intr)
344 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
346 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
348 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
351 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
355 ret = kxcjk1013_set_mode(data, OPERATION);
359 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
365 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
368 int idx = data->chipset;
370 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
371 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
372 return odr_start_up_times[idx][i].usec;
375 return KXCJK1013_MAX_STARTUP_TIME_US;
379 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
385 ret = pm_runtime_get_sync(&data->client->dev);
387 pm_runtime_mark_last_busy(&data->client->dev);
388 ret = pm_runtime_put_autosuspend(&data->client->dev);
391 dev_err(&data->client->dev,
392 "Failed: kxcjk1013_set_power_state for %d\n", on);
394 pm_runtime_put_noidle(&data->client->dev);
402 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
406 ret = i2c_smbus_write_byte_data(data->client,
407 KXCJK1013_REG_WAKE_TIMER,
410 dev_err(&data->client->dev,
411 "Error writing reg_wake_timer\n");
415 ret = i2c_smbus_write_byte_data(data->client,
416 KXCJK1013_REG_WAKE_THRES,
419 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
426 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
430 enum kxcjk1013_mode store_mode;
432 ret = kxcjk1013_get_mode(data, &store_mode);
436 /* This is requirement by spec to change state to STANDBY */
437 ret = kxcjk1013_set_mode(data, STANDBY);
441 ret = kxcjk1013_chip_update_thresholds(data);
445 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
447 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
452 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
454 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
456 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
459 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
463 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
465 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
470 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
472 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
474 ret = i2c_smbus_write_byte_data(data->client,
475 KXCJK1013_REG_CTRL1, ret);
477 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
481 if (store_mode == OPERATION) {
482 ret = kxcjk1013_set_mode(data, OPERATION);
490 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
494 enum kxcjk1013_mode store_mode;
496 ret = kxcjk1013_get_mode(data, &store_mode);
500 /* This is requirement by spec to change state to STANDBY */
501 ret = kxcjk1013_set_mode(data, STANDBY);
505 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
507 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
512 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
514 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
516 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
519 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
523 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
525 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
530 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
532 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
534 ret = i2c_smbus_write_byte_data(data->client,
535 KXCJK1013_REG_CTRL1, ret);
537 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
541 if (store_mode == OPERATION) {
542 ret = kxcjk1013_set_mode(data, OPERATION);
550 static int kxcjk1013_convert_freq_to_bit(int val, int val2)
554 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
555 if (samp_freq_table[i].val == val &&
556 samp_freq_table[i].val2 == val2) {
557 return samp_freq_table[i].odr_bits;
564 static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
568 for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
569 if (wake_odr_data_rate_table[i].val == val &&
570 wake_odr_data_rate_table[i].val2 == val2) {
571 return wake_odr_data_rate_table[i].odr_bits;
578 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
582 enum kxcjk1013_mode store_mode;
584 ret = kxcjk1013_get_mode(data, &store_mode);
588 odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
592 /* To change ODR, the chip must be set to STANDBY as per spec */
593 ret = kxcjk1013_set_mode(data, STANDBY);
597 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
600 dev_err(&data->client->dev, "Error writing data_ctrl\n");
604 data->odr_bits = odr_bits;
606 odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
610 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
613 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
617 if (store_mode == OPERATION) {
618 ret = kxcjk1013_set_mode(data, OPERATION);
626 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
630 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
631 if (samp_freq_table[i].odr_bits == data->odr_bits) {
632 *val = samp_freq_table[i].val;
633 *val2 = samp_freq_table[i].val2;
634 return IIO_VAL_INT_PLUS_MICRO;
641 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
643 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
646 ret = i2c_smbus_read_word_data(data->client, reg);
648 dev_err(&data->client->dev,
649 "failed to read accel_%c registers\n", 'x' + axis);
656 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
659 enum kxcjk1013_mode store_mode;
662 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
663 if (KXCJK1013_scale_table[i].scale == val) {
665 ret = kxcjk1013_get_mode(data, &store_mode);
669 ret = kxcjk1013_set_mode(data, STANDBY);
673 ret = kxcjk1013_set_range(data, i);
677 if (store_mode == OPERATION) {
678 ret = kxcjk1013_set_mode(data, OPERATION);
690 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
691 struct iio_chan_spec const *chan, int *val,
692 int *val2, long mask)
694 struct kxcjk1013_data *data = iio_priv(indio_dev);
698 case IIO_CHAN_INFO_RAW:
699 mutex_lock(&data->mutex);
700 if (iio_buffer_enabled(indio_dev))
703 ret = kxcjk1013_set_power_state(data, true);
705 mutex_unlock(&data->mutex);
708 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
710 kxcjk1013_set_power_state(data, false);
711 mutex_unlock(&data->mutex);
714 *val = sign_extend32(ret >> 4, 11);
715 ret = kxcjk1013_set_power_state(data, false);
717 mutex_unlock(&data->mutex);
724 case IIO_CHAN_INFO_SCALE:
726 *val2 = KXCJK1013_scale_table[data->range].scale;
727 return IIO_VAL_INT_PLUS_MICRO;
729 case IIO_CHAN_INFO_SAMP_FREQ:
730 mutex_lock(&data->mutex);
731 ret = kxcjk1013_get_odr(data, val, val2);
732 mutex_unlock(&data->mutex);
740 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
741 struct iio_chan_spec const *chan, int val,
744 struct kxcjk1013_data *data = iio_priv(indio_dev);
748 case IIO_CHAN_INFO_SAMP_FREQ:
749 mutex_lock(&data->mutex);
750 ret = kxcjk1013_set_odr(data, val, val2);
751 mutex_unlock(&data->mutex);
753 case IIO_CHAN_INFO_SCALE:
757 mutex_lock(&data->mutex);
758 ret = kxcjk1013_set_scale(data, val2);
759 mutex_unlock(&data->mutex);
768 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
769 const struct iio_chan_spec *chan,
770 enum iio_event_type type,
771 enum iio_event_direction dir,
772 enum iio_event_info info,
775 struct kxcjk1013_data *data = iio_priv(indio_dev);
779 case IIO_EV_INFO_VALUE:
780 *val = data->wake_thres;
782 case IIO_EV_INFO_PERIOD:
783 *val = data->wake_dur;
792 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
793 const struct iio_chan_spec *chan,
794 enum iio_event_type type,
795 enum iio_event_direction dir,
796 enum iio_event_info info,
799 struct kxcjk1013_data *data = iio_priv(indio_dev);
801 if (data->ev_enable_state)
805 case IIO_EV_INFO_VALUE:
806 data->wake_thres = val;
808 case IIO_EV_INFO_PERIOD:
809 data->wake_dur = val;
818 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
819 const struct iio_chan_spec *chan,
820 enum iio_event_type type,
821 enum iio_event_direction dir)
824 struct kxcjk1013_data *data = iio_priv(indio_dev);
826 return data->ev_enable_state;
829 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
830 const struct iio_chan_spec *chan,
831 enum iio_event_type type,
832 enum iio_event_direction dir,
835 struct kxcjk1013_data *data = iio_priv(indio_dev);
838 if (state && data->ev_enable_state)
841 mutex_lock(&data->mutex);
843 if (!state && data->motion_trigger_on) {
844 data->ev_enable_state = 0;
845 mutex_unlock(&data->mutex);
850 * We will expect the enable and disable to do operation in
851 * in reverse order. This will happen here anyway as our
852 * resume operation uses sync mode runtime pm calls, the
853 * suspend operation will be delayed by autosuspend delay
854 * So the disable operation will still happen in reverse of
855 * enable operation. When runtime pm is disabled the mode
856 * is always on so sequence doesn't matter
858 ret = kxcjk1013_set_power_state(data, state);
860 mutex_unlock(&data->mutex);
864 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
866 kxcjk1013_set_power_state(data, false);
867 data->ev_enable_state = 0;
868 mutex_unlock(&data->mutex);
872 data->ev_enable_state = state;
873 mutex_unlock(&data->mutex);
878 static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
879 struct iio_trigger *trig)
881 struct kxcjk1013_data *data = iio_priv(indio_dev);
883 if (data->dready_trig != trig && data->motion_trig != trig)
889 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
890 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
892 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
894 static struct attribute *kxcjk1013_attributes[] = {
895 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
896 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
900 static const struct attribute_group kxcjk1013_attrs_group = {
901 .attrs = kxcjk1013_attributes,
904 static const struct iio_event_spec kxcjk1013_event = {
905 .type = IIO_EV_TYPE_THRESH,
906 .dir = IIO_EV_DIR_EITHER,
907 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
908 BIT(IIO_EV_INFO_ENABLE) |
909 BIT(IIO_EV_INFO_PERIOD)
912 #define KXCJK1013_CHANNEL(_axis) { \
915 .channel2 = IIO_MOD_##_axis, \
916 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
917 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
918 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
919 .scan_index = AXIS_##_axis, \
925 .endianness = IIO_CPU, \
927 .event_spec = &kxcjk1013_event, \
928 .num_event_specs = 1 \
931 static const struct iio_chan_spec kxcjk1013_channels[] = {
932 KXCJK1013_CHANNEL(X),
933 KXCJK1013_CHANNEL(Y),
934 KXCJK1013_CHANNEL(Z),
935 IIO_CHAN_SOFT_TIMESTAMP(3),
938 static const struct iio_info kxcjk1013_info = {
939 .attrs = &kxcjk1013_attrs_group,
940 .read_raw = kxcjk1013_read_raw,
941 .write_raw = kxcjk1013_write_raw,
942 .read_event_value = kxcjk1013_read_event,
943 .write_event_value = kxcjk1013_write_event,
944 .write_event_config = kxcjk1013_write_event_config,
945 .read_event_config = kxcjk1013_read_event_config,
946 .validate_trigger = kxcjk1013_validate_trigger,
947 .driver_module = THIS_MODULE,
950 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
952 struct iio_poll_func *pf = p;
953 struct iio_dev *indio_dev = pf->indio_dev;
954 struct kxcjk1013_data *data = iio_priv(indio_dev);
957 mutex_lock(&data->mutex);
959 for_each_set_bit(bit, indio_dev->active_scan_mask,
960 indio_dev->masklength) {
961 ret = kxcjk1013_get_acc_reg(data, bit);
963 mutex_unlock(&data->mutex);
966 data->buffer[i++] = ret;
968 mutex_unlock(&data->mutex);
970 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
973 iio_trigger_notify_done(indio_dev->trig);
978 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
980 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
981 struct kxcjk1013_data *data = iio_priv(indio_dev);
984 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
986 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
993 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
996 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
997 struct kxcjk1013_data *data = iio_priv(indio_dev);
1000 mutex_lock(&data->mutex);
1002 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1003 data->motion_trigger_on = false;
1004 mutex_unlock(&data->mutex);
1008 ret = kxcjk1013_set_power_state(data, state);
1010 mutex_unlock(&data->mutex);
1013 if (data->motion_trig == trig)
1014 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1016 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1018 kxcjk1013_set_power_state(data, false);
1019 mutex_unlock(&data->mutex);
1022 if (data->motion_trig == trig)
1023 data->motion_trigger_on = state;
1025 data->dready_trigger_on = state;
1027 mutex_unlock(&data->mutex);
1032 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1033 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1034 .try_reenable = kxcjk1013_trig_try_reen,
1035 .owner = THIS_MODULE,
1038 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1040 struct iio_dev *indio_dev = private;
1041 struct kxcjk1013_data *data = iio_priv(indio_dev);
1044 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1046 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1051 ret = i2c_smbus_read_byte_data(data->client,
1052 KXCJK1013_REG_INT_SRC2);
1054 dev_err(&data->client->dev,
1055 "Error reading reg_int_src2\n");
1059 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1060 iio_push_event(indio_dev,
1061 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1065 IIO_EV_DIR_FALLING),
1067 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1068 iio_push_event(indio_dev,
1069 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1077 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1078 iio_push_event(indio_dev,
1079 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1083 IIO_EV_DIR_FALLING),
1085 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1086 iio_push_event(indio_dev,
1087 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1094 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1095 iio_push_event(indio_dev,
1096 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1100 IIO_EV_DIR_FALLING),
1102 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1103 iio_push_event(indio_dev,
1104 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1113 if (data->dready_trigger_on)
1116 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1118 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1123 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1125 struct iio_dev *indio_dev = private;
1126 struct kxcjk1013_data *data = iio_priv(indio_dev);
1128 data->timestamp = iio_get_time_ns();
1130 if (data->dready_trigger_on)
1131 iio_trigger_poll(data->dready_trig);
1132 else if (data->motion_trigger_on)
1133 iio_trigger_poll(data->motion_trig);
1135 if (data->ev_enable_state)
1136 return IRQ_WAKE_THREAD;
1141 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1142 enum kx_chipset *chipset,
1143 bool *is_smo8500_device)
1145 const struct acpi_device_id *id;
1147 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1150 if (strcmp(id->id, "SMO8500") == 0)
1151 *is_smo8500_device = true;
1152 *chipset = (enum kx_chipset)id->driver_data;
1154 return dev_name(dev);
1157 static int kxcjk1013_gpio_probe(struct i2c_client *client,
1158 struct kxcjk1013_data *data)
1161 struct gpio_desc *gpio;
1166 if (data->is_smo8500_device)
1171 /* data ready gpio interrupt pin */
1172 gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
1174 dev_err(dev, "acpi gpio get index failed\n");
1175 return PTR_ERR(gpio);
1178 ret = gpiod_direction_input(gpio);
1182 ret = gpiod_to_irq(gpio);
1184 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1189 static int kxcjk1013_probe(struct i2c_client *client,
1190 const struct i2c_device_id *id)
1192 struct kxcjk1013_data *data;
1193 struct iio_dev *indio_dev;
1194 struct kxcjk_1013_platform_data *pdata;
1198 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1202 data = iio_priv(indio_dev);
1203 i2c_set_clientdata(client, indio_dev);
1204 data->client = client;
1206 pdata = dev_get_platdata(&client->dev);
1208 data->active_high_intr = pdata->active_high_intr;
1210 data->active_high_intr = true; /* default polarity */
1213 data->chipset = (enum kx_chipset)(id->driver_data);
1215 } else if (ACPI_HANDLE(&client->dev)) {
1216 name = kxcjk1013_match_acpi_device(&client->dev,
1218 &data->is_smo8500_device);
1222 ret = kxcjk1013_chip_init(data);
1226 mutex_init(&data->mutex);
1228 indio_dev->dev.parent = &client->dev;
1229 indio_dev->channels = kxcjk1013_channels;
1230 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1231 indio_dev->name = name;
1232 indio_dev->modes = INDIO_DIRECT_MODE;
1233 indio_dev->info = &kxcjk1013_info;
1235 if (client->irq < 0)
1236 client->irq = kxcjk1013_gpio_probe(client, data);
1238 if (client->irq >= 0) {
1239 ret = devm_request_threaded_irq(&client->dev, client->irq,
1240 kxcjk1013_data_rdy_trig_poll,
1241 kxcjk1013_event_handler,
1242 IRQF_TRIGGER_RISING,
1248 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1252 if (!data->dready_trig) {
1257 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1258 "%s-any-motion-dev%d",
1261 if (!data->motion_trig) {
1266 data->dready_trig->dev.parent = &client->dev;
1267 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1268 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1269 indio_dev->trig = data->dready_trig;
1270 iio_trigger_get(indio_dev->trig);
1271 ret = iio_trigger_register(data->dready_trig);
1275 data->motion_trig->dev.parent = &client->dev;
1276 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1277 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1278 ret = iio_trigger_register(data->motion_trig);
1280 data->motion_trig = NULL;
1281 goto err_trigger_unregister;
1284 ret = iio_triggered_buffer_setup(indio_dev,
1285 &iio_pollfunc_store_time,
1286 kxcjk1013_trigger_handler,
1289 dev_err(&client->dev,
1290 "iio triggered buffer setup failed\n");
1291 goto err_trigger_unregister;
1295 ret = iio_device_register(indio_dev);
1297 dev_err(&client->dev, "unable to register iio device\n");
1298 goto err_buffer_cleanup;
1301 ret = pm_runtime_set_active(&client->dev);
1303 goto err_iio_unregister;
1305 pm_runtime_enable(&client->dev);
1306 pm_runtime_set_autosuspend_delay(&client->dev,
1307 KXCJK1013_SLEEP_DELAY_MS);
1308 pm_runtime_use_autosuspend(&client->dev);
1313 iio_device_unregister(indio_dev);
1315 if (data->dready_trig)
1316 iio_triggered_buffer_cleanup(indio_dev);
1317 err_trigger_unregister:
1318 if (data->dready_trig)
1319 iio_trigger_unregister(data->dready_trig);
1320 if (data->motion_trig)
1321 iio_trigger_unregister(data->motion_trig);
1323 kxcjk1013_set_mode(data, STANDBY);
1328 static int kxcjk1013_remove(struct i2c_client *client)
1330 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1331 struct kxcjk1013_data *data = iio_priv(indio_dev);
1333 pm_runtime_disable(&client->dev);
1334 pm_runtime_set_suspended(&client->dev);
1335 pm_runtime_put_noidle(&client->dev);
1337 iio_device_unregister(indio_dev);
1339 if (data->dready_trig) {
1340 iio_triggered_buffer_cleanup(indio_dev);
1341 iio_trigger_unregister(data->dready_trig);
1342 iio_trigger_unregister(data->motion_trig);
1345 mutex_lock(&data->mutex);
1346 kxcjk1013_set_mode(data, STANDBY);
1347 mutex_unlock(&data->mutex);
1352 #ifdef CONFIG_PM_SLEEP
1353 static int kxcjk1013_suspend(struct device *dev)
1355 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1356 struct kxcjk1013_data *data = iio_priv(indio_dev);
1359 mutex_lock(&data->mutex);
1360 ret = kxcjk1013_set_mode(data, STANDBY);
1361 mutex_unlock(&data->mutex);
1366 static int kxcjk1013_resume(struct device *dev)
1368 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1369 struct kxcjk1013_data *data = iio_priv(indio_dev);
1372 mutex_lock(&data->mutex);
1373 ret = kxcjk1013_set_mode(data, OPERATION);
1374 mutex_unlock(&data->mutex);
1381 static int kxcjk1013_runtime_suspend(struct device *dev)
1383 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1384 struct kxcjk1013_data *data = iio_priv(indio_dev);
1387 ret = kxcjk1013_set_mode(data, STANDBY);
1389 dev_err(&data->client->dev, "powering off device failed\n");
1395 static int kxcjk1013_runtime_resume(struct device *dev)
1397 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1398 struct kxcjk1013_data *data = iio_priv(indio_dev);
1402 ret = kxcjk1013_set_mode(data, OPERATION);
1406 sleep_val = kxcjk1013_get_startup_times(data);
1407 if (sleep_val < 20000)
1408 usleep_range(sleep_val, 20000);
1410 msleep_interruptible(sleep_val/1000);
1416 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1417 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1418 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1419 kxcjk1013_runtime_resume, NULL)
1422 static const struct acpi_device_id kx_acpi_match[] = {
1423 {"KXCJ1013", KXCJK1013},
1424 {"KXCJ1008", KXCJ91008},
1425 {"KXTJ1009", KXTJ21009},
1426 {"SMO8500", KXCJ91008},
1429 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1431 static const struct i2c_device_id kxcjk1013_id[] = {
1432 {"kxcjk1013", KXCJK1013},
1433 {"kxcj91008", KXCJ91008},
1434 {"kxtj21009", KXTJ21009},
1435 {"SMO8500", KXCJ91008},
1439 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1441 static struct i2c_driver kxcjk1013_driver = {
1443 .name = KXCJK1013_DRV_NAME,
1444 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1445 .pm = &kxcjk1013_pm_ops,
1447 .probe = kxcjk1013_probe,
1448 .remove = kxcjk1013_remove,
1449 .id_table = kxcjk1013_id,
1451 module_i2c_driver(kxcjk1013_driver);
1453 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1454 MODULE_LICENSE("GPL v2");
1455 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");