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>
24 #include <linux/pm_runtime.h>
25 #include <linux/iio/iio.h>
26 #include <linux/iio/sysfs.h>
27 #include <linux/iio/buffer.h>
28 #include <linux/iio/trigger.h>
29 #include <linux/iio/events.h>
30 #include <linux/iio/trigger_consumer.h>
31 #include <linux/iio/triggered_buffer.h>
32 #include <linux/iio/accel/kxcjk_1013.h>
34 #define KXCJK1013_DRV_NAME "kxcjk1013"
35 #define KXCJK1013_IRQ_NAME "kxcjk1013_event"
37 #define KXCJK1013_REG_XOUT_L 0x06
39 * From low byte X axis register, all the other addresses of Y and Z can be
40 * obtained by just applying axis offset. The following axis defines are just
41 * provide clarity, but not used.
43 #define KXCJK1013_REG_XOUT_H 0x07
44 #define KXCJK1013_REG_YOUT_L 0x08
45 #define KXCJK1013_REG_YOUT_H 0x09
46 #define KXCJK1013_REG_ZOUT_L 0x0A
47 #define KXCJK1013_REG_ZOUT_H 0x0B
49 #define KXCJK1013_REG_DCST_RESP 0x0C
50 #define KXCJK1013_REG_WHO_AM_I 0x0F
51 #define KXCJK1013_REG_INT_SRC1 0x16
52 #define KXCJK1013_REG_INT_SRC2 0x17
53 #define KXCJK1013_REG_STATUS_REG 0x18
54 #define KXCJK1013_REG_INT_REL 0x1A
55 #define KXCJK1013_REG_CTRL1 0x1B
56 #define KXCJK1013_REG_CTRL2 0x1D
57 #define KXCJK1013_REG_INT_CTRL1 0x1E
58 #define KXCJK1013_REG_INT_CTRL2 0x1F
59 #define KXCJK1013_REG_DATA_CTRL 0x21
60 #define KXCJK1013_REG_WAKE_TIMER 0x29
61 #define KXCJK1013_REG_SELF_TEST 0x3A
62 #define KXCJK1013_REG_WAKE_THRES 0x6A
64 #define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
65 #define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
66 #define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
67 #define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
68 #define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
69 #define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
70 #define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
71 #define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
73 #define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
74 #define KXCJK1013_MAX_STARTUP_TIME_US 100000
76 #define KXCJK1013_SLEEP_DELAY_MS 2000
78 #define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
79 #define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
80 #define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
81 #define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
82 #define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
83 #define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
85 #define KXCJK1013_DEFAULT_WAKE_THRES 1
91 KX_MAX_CHIPS /* this must be last */
100 enum kxcjk1013_axis {
107 struct kxcjk1013_data {
108 struct i2c_client *client;
109 struct iio_trigger *dready_trig;
110 struct iio_trigger *motion_trig;
112 /* Ensure timestamp naturally aligned */
115 s64 timestamp __aligned(8);
121 bool active_high_intr;
122 bool dready_trigger_on;
124 bool motion_trigger_on;
126 enum kx_chipset chipset;
127 enum kx_acpi_type acpi_type;
130 enum kxcjk1013_mode {
135 enum kxcjk1013_range {
141 static const struct {
145 } samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
146 {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
147 {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
148 {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
151 /* Refer to section 4 of the specification */
152 static const struct {
155 } odr_start_up_times[KX_MAX_CHIPS][12] = {
203 static const struct {
207 } KXCJK1013_scale_table[] = { {9582, 0, 0},
211 static const struct {
215 } wake_odr_data_rate_table[] = { {0, 781000, 0x00},
229 enum kiox010a_fn_index {
230 KIOX010A_SET_LAPTOP_MODE = 1,
231 KIOX010A_SET_TABLET_MODE = 2,
234 static int kiox010a_dsm(struct device *dev, int fn_index)
236 acpi_handle handle = ACPI_HANDLE(dev);
237 guid_t kiox010a_dsm_guid;
238 union acpi_object *obj;
243 guid_parse("1f339696-d475-4e26-8cad-2e9f8e6d7a91", &kiox010a_dsm_guid);
245 obj = acpi_evaluate_dsm(handle, &kiox010a_dsm_guid, 1, fn_index, NULL);
254 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
255 enum kxcjk1013_mode mode)
259 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
261 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
266 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
268 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
270 ret = i2c_smbus_write_byte_data(data->client,
271 KXCJK1013_REG_CTRL1, ret);
273 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
280 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
281 enum kxcjk1013_mode *mode)
285 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
287 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
291 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
299 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
303 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
305 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
309 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
310 KXCJK1013_REG_CTRL1_BIT_GSEL1);
311 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
312 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
314 ret = i2c_smbus_write_byte_data(data->client,
318 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
322 data->range = range_index;
327 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
332 if (data->acpi_type == ACPI_KIOX010A) {
333 /* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
334 kiox010a_dsm(&data->client->dev, KIOX010A_SET_LAPTOP_MODE);
338 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
340 dev_err(&data->client->dev, "Error reading who_am_i\n");
344 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
346 ret = kxcjk1013_set_mode(data, STANDBY);
350 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
352 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
356 /* Set 12 bit mode */
357 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
359 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
362 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
366 /* Setting range to 4G */
367 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
371 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
373 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
377 data->odr_bits = ret;
379 /* Set up INT polarity */
380 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
382 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
386 if (data->active_high_intr)
387 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
389 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
391 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
394 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
398 ret = kxcjk1013_set_mode(data, OPERATION);
402 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
408 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
411 int idx = data->chipset;
413 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
414 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
415 return odr_start_up_times[idx][i].usec;
418 return KXCJK1013_MAX_STARTUP_TIME_US;
422 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
428 ret = pm_runtime_get_sync(&data->client->dev);
430 pm_runtime_mark_last_busy(&data->client->dev);
431 ret = pm_runtime_put_autosuspend(&data->client->dev);
434 dev_err(&data->client->dev,
435 "Failed: kxcjk1013_set_power_state for %d\n", on);
437 pm_runtime_put_noidle(&data->client->dev);
445 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
449 ret = i2c_smbus_write_byte_data(data->client,
450 KXCJK1013_REG_WAKE_TIMER,
453 dev_err(&data->client->dev,
454 "Error writing reg_wake_timer\n");
458 ret = i2c_smbus_write_byte_data(data->client,
459 KXCJK1013_REG_WAKE_THRES,
462 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
469 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
473 enum kxcjk1013_mode store_mode;
475 ret = kxcjk1013_get_mode(data, &store_mode);
479 /* This is requirement by spec to change state to STANDBY */
480 ret = kxcjk1013_set_mode(data, STANDBY);
484 ret = kxcjk1013_chip_update_thresholds(data);
488 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
490 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
495 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
497 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
499 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
502 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
506 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
508 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
513 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
515 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
517 ret = i2c_smbus_write_byte_data(data->client,
518 KXCJK1013_REG_CTRL1, ret);
520 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
524 if (store_mode == OPERATION) {
525 ret = kxcjk1013_set_mode(data, OPERATION);
533 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
537 enum kxcjk1013_mode store_mode;
539 ret = kxcjk1013_get_mode(data, &store_mode);
543 /* This is requirement by spec to change state to STANDBY */
544 ret = kxcjk1013_set_mode(data, STANDBY);
548 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
550 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
555 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
557 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
559 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
562 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
566 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
568 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
573 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
575 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
577 ret = i2c_smbus_write_byte_data(data->client,
578 KXCJK1013_REG_CTRL1, ret);
580 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
584 if (store_mode == OPERATION) {
585 ret = kxcjk1013_set_mode(data, OPERATION);
593 static int kxcjk1013_convert_freq_to_bit(int val, int val2)
597 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
598 if (samp_freq_table[i].val == val &&
599 samp_freq_table[i].val2 == val2) {
600 return samp_freq_table[i].odr_bits;
607 static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
611 for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
612 if (wake_odr_data_rate_table[i].val == val &&
613 wake_odr_data_rate_table[i].val2 == val2) {
614 return wake_odr_data_rate_table[i].odr_bits;
621 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
625 enum kxcjk1013_mode store_mode;
627 ret = kxcjk1013_get_mode(data, &store_mode);
631 odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
635 /* To change ODR, the chip must be set to STANDBY as per spec */
636 ret = kxcjk1013_set_mode(data, STANDBY);
640 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
643 dev_err(&data->client->dev, "Error writing data_ctrl\n");
647 data->odr_bits = odr_bits;
649 odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
653 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
656 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
660 if (store_mode == OPERATION) {
661 ret = kxcjk1013_set_mode(data, OPERATION);
669 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
673 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
674 if (samp_freq_table[i].odr_bits == data->odr_bits) {
675 *val = samp_freq_table[i].val;
676 *val2 = samp_freq_table[i].val2;
677 return IIO_VAL_INT_PLUS_MICRO;
684 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
686 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
689 ret = i2c_smbus_read_word_data(data->client, reg);
691 dev_err(&data->client->dev,
692 "failed to read accel_%c registers\n", 'x' + axis);
699 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
702 enum kxcjk1013_mode store_mode;
704 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
705 if (KXCJK1013_scale_table[i].scale == val) {
706 ret = kxcjk1013_get_mode(data, &store_mode);
710 ret = kxcjk1013_set_mode(data, STANDBY);
714 ret = kxcjk1013_set_range(data, i);
718 if (store_mode == OPERATION) {
719 ret = kxcjk1013_set_mode(data, OPERATION);
731 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
732 struct iio_chan_spec const *chan, int *val,
733 int *val2, long mask)
735 struct kxcjk1013_data *data = iio_priv(indio_dev);
739 case IIO_CHAN_INFO_RAW:
740 mutex_lock(&data->mutex);
741 if (iio_buffer_enabled(indio_dev))
744 ret = kxcjk1013_set_power_state(data, true);
746 mutex_unlock(&data->mutex);
749 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
751 kxcjk1013_set_power_state(data, false);
752 mutex_unlock(&data->mutex);
755 *val = sign_extend32(ret >> 4, 11);
756 ret = kxcjk1013_set_power_state(data, false);
758 mutex_unlock(&data->mutex);
765 case IIO_CHAN_INFO_SCALE:
767 *val2 = KXCJK1013_scale_table[data->range].scale;
768 return IIO_VAL_INT_PLUS_MICRO;
770 case IIO_CHAN_INFO_SAMP_FREQ:
771 mutex_lock(&data->mutex);
772 ret = kxcjk1013_get_odr(data, val, val2);
773 mutex_unlock(&data->mutex);
781 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
782 struct iio_chan_spec const *chan, int val,
785 struct kxcjk1013_data *data = iio_priv(indio_dev);
789 case IIO_CHAN_INFO_SAMP_FREQ:
790 mutex_lock(&data->mutex);
791 ret = kxcjk1013_set_odr(data, val, val2);
792 mutex_unlock(&data->mutex);
794 case IIO_CHAN_INFO_SCALE:
798 mutex_lock(&data->mutex);
799 ret = kxcjk1013_set_scale(data, val2);
800 mutex_unlock(&data->mutex);
809 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
810 const struct iio_chan_spec *chan,
811 enum iio_event_type type,
812 enum iio_event_direction dir,
813 enum iio_event_info info,
816 struct kxcjk1013_data *data = iio_priv(indio_dev);
820 case IIO_EV_INFO_VALUE:
821 *val = data->wake_thres;
823 case IIO_EV_INFO_PERIOD:
824 *val = data->wake_dur;
833 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
834 const struct iio_chan_spec *chan,
835 enum iio_event_type type,
836 enum iio_event_direction dir,
837 enum iio_event_info info,
840 struct kxcjk1013_data *data = iio_priv(indio_dev);
842 if (data->ev_enable_state)
846 case IIO_EV_INFO_VALUE:
847 data->wake_thres = val;
849 case IIO_EV_INFO_PERIOD:
850 data->wake_dur = val;
859 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
860 const struct iio_chan_spec *chan,
861 enum iio_event_type type,
862 enum iio_event_direction dir)
864 struct kxcjk1013_data *data = iio_priv(indio_dev);
866 return data->ev_enable_state;
869 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
870 const struct iio_chan_spec *chan,
871 enum iio_event_type type,
872 enum iio_event_direction dir,
875 struct kxcjk1013_data *data = iio_priv(indio_dev);
878 if (state && data->ev_enable_state)
881 mutex_lock(&data->mutex);
883 if (!state && data->motion_trigger_on) {
884 data->ev_enable_state = 0;
885 mutex_unlock(&data->mutex);
890 * We will expect the enable and disable to do operation in
891 * in reverse order. This will happen here anyway as our
892 * resume operation uses sync mode runtime pm calls, the
893 * suspend operation will be delayed by autosuspend delay
894 * So the disable operation will still happen in reverse of
895 * enable operation. When runtime pm is disabled the mode
896 * is always on so sequence doesn't matter
898 ret = kxcjk1013_set_power_state(data, state);
900 mutex_unlock(&data->mutex);
904 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
906 kxcjk1013_set_power_state(data, false);
907 data->ev_enable_state = 0;
908 mutex_unlock(&data->mutex);
912 data->ev_enable_state = state;
913 mutex_unlock(&data->mutex);
918 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
920 struct kxcjk1013_data *data = iio_priv(indio_dev);
922 return kxcjk1013_set_power_state(data, true);
925 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
927 struct kxcjk1013_data *data = iio_priv(indio_dev);
929 return kxcjk1013_set_power_state(data, false);
932 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
933 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
935 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
937 static struct attribute *kxcjk1013_attributes[] = {
938 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
939 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
943 static const struct attribute_group kxcjk1013_attrs_group = {
944 .attrs = kxcjk1013_attributes,
947 static const struct iio_event_spec kxcjk1013_event = {
948 .type = IIO_EV_TYPE_THRESH,
949 .dir = IIO_EV_DIR_EITHER,
950 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
951 BIT(IIO_EV_INFO_ENABLE) |
952 BIT(IIO_EV_INFO_PERIOD)
955 #define KXCJK1013_CHANNEL(_axis) { \
958 .channel2 = IIO_MOD_##_axis, \
959 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
960 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
961 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
962 .scan_index = AXIS_##_axis, \
968 .endianness = IIO_LE, \
970 .event_spec = &kxcjk1013_event, \
971 .num_event_specs = 1 \
974 static const struct iio_chan_spec kxcjk1013_channels[] = {
975 KXCJK1013_CHANNEL(X),
976 KXCJK1013_CHANNEL(Y),
977 KXCJK1013_CHANNEL(Z),
978 IIO_CHAN_SOFT_TIMESTAMP(3),
981 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
982 .preenable = kxcjk1013_buffer_preenable,
983 .postenable = iio_triggered_buffer_postenable,
984 .postdisable = kxcjk1013_buffer_postdisable,
985 .predisable = iio_triggered_buffer_predisable,
988 static const struct iio_info kxcjk1013_info = {
989 .attrs = &kxcjk1013_attrs_group,
990 .read_raw = kxcjk1013_read_raw,
991 .write_raw = kxcjk1013_write_raw,
992 .read_event_value = kxcjk1013_read_event,
993 .write_event_value = kxcjk1013_write_event,
994 .write_event_config = kxcjk1013_write_event_config,
995 .read_event_config = kxcjk1013_read_event_config,
996 .driver_module = THIS_MODULE,
999 static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
1001 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
1003 struct iio_poll_func *pf = p;
1004 struct iio_dev *indio_dev = pf->indio_dev;
1005 struct kxcjk1013_data *data = iio_priv(indio_dev);
1008 mutex_lock(&data->mutex);
1009 ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
1010 KXCJK1013_REG_XOUT_L,
1012 (u8 *)data->scan.chans);
1013 mutex_unlock(&data->mutex);
1017 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
1020 iio_trigger_notify_done(indio_dev->trig);
1025 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
1027 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1028 struct kxcjk1013_data *data = iio_priv(indio_dev);
1031 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1033 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1040 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1043 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1044 struct kxcjk1013_data *data = iio_priv(indio_dev);
1047 mutex_lock(&data->mutex);
1049 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1050 data->motion_trigger_on = false;
1051 mutex_unlock(&data->mutex);
1055 ret = kxcjk1013_set_power_state(data, state);
1057 mutex_unlock(&data->mutex);
1060 if (data->motion_trig == trig)
1061 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1063 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1065 kxcjk1013_set_power_state(data, false);
1066 mutex_unlock(&data->mutex);
1069 if (data->motion_trig == trig)
1070 data->motion_trigger_on = state;
1072 data->dready_trigger_on = state;
1074 mutex_unlock(&data->mutex);
1079 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1080 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1081 .try_reenable = kxcjk1013_trig_try_reen,
1082 .owner = THIS_MODULE,
1085 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1087 struct iio_dev *indio_dev = private;
1088 struct kxcjk1013_data *data = iio_priv(indio_dev);
1091 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1093 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1098 ret = i2c_smbus_read_byte_data(data->client,
1099 KXCJK1013_REG_INT_SRC2);
1101 dev_err(&data->client->dev,
1102 "Error reading reg_int_src2\n");
1106 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1107 iio_push_event(indio_dev,
1108 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1112 IIO_EV_DIR_FALLING),
1114 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1115 iio_push_event(indio_dev,
1116 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1124 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1125 iio_push_event(indio_dev,
1126 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1130 IIO_EV_DIR_FALLING),
1132 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1133 iio_push_event(indio_dev,
1134 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1141 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1142 iio_push_event(indio_dev,
1143 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1147 IIO_EV_DIR_FALLING),
1149 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1150 iio_push_event(indio_dev,
1151 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1160 if (data->dready_trigger_on)
1163 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1165 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1170 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1172 struct iio_dev *indio_dev = private;
1173 struct kxcjk1013_data *data = iio_priv(indio_dev);
1175 data->timestamp = iio_get_time_ns(indio_dev);
1177 if (data->dready_trigger_on)
1178 iio_trigger_poll(data->dready_trig);
1179 else if (data->motion_trigger_on)
1180 iio_trigger_poll(data->motion_trig);
1182 if (data->ev_enable_state)
1183 return IRQ_WAKE_THREAD;
1188 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1189 enum kx_chipset *chipset,
1190 enum kx_acpi_type *acpi_type)
1192 const struct acpi_device_id *id;
1194 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1198 if (strcmp(id->id, "SMO8500") == 0)
1199 *acpi_type = ACPI_SMO8500;
1200 else if (strcmp(id->id, "KIOX010A") == 0)
1201 *acpi_type = ACPI_KIOX010A;
1203 *chipset = (enum kx_chipset)id->driver_data;
1205 return dev_name(dev);
1208 static int kxcjk1013_probe(struct i2c_client *client,
1209 const struct i2c_device_id *id)
1211 struct kxcjk1013_data *data;
1212 struct iio_dev *indio_dev;
1213 struct kxcjk_1013_platform_data *pdata;
1217 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1221 data = iio_priv(indio_dev);
1222 i2c_set_clientdata(client, indio_dev);
1223 data->client = client;
1225 pdata = dev_get_platdata(&client->dev);
1227 data->active_high_intr = pdata->active_high_intr;
1229 data->active_high_intr = true; /* default polarity */
1232 data->chipset = (enum kx_chipset)(id->driver_data);
1234 } else if (ACPI_HANDLE(&client->dev)) {
1235 name = kxcjk1013_match_acpi_device(&client->dev,
1241 ret = kxcjk1013_chip_init(data);
1245 mutex_init(&data->mutex);
1247 indio_dev->dev.parent = &client->dev;
1248 indio_dev->channels = kxcjk1013_channels;
1249 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1250 indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1251 indio_dev->name = name;
1252 indio_dev->modes = INDIO_DIRECT_MODE;
1253 indio_dev->info = &kxcjk1013_info;
1255 if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1256 ret = devm_request_threaded_irq(&client->dev, client->irq,
1257 kxcjk1013_data_rdy_trig_poll,
1258 kxcjk1013_event_handler,
1259 IRQF_TRIGGER_RISING,
1265 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1269 if (!data->dready_trig) {
1274 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1275 "%s-any-motion-dev%d",
1278 if (!data->motion_trig) {
1283 data->dready_trig->dev.parent = &client->dev;
1284 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1285 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1286 indio_dev->trig = data->dready_trig;
1287 iio_trigger_get(indio_dev->trig);
1288 ret = iio_trigger_register(data->dready_trig);
1292 data->motion_trig->dev.parent = &client->dev;
1293 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1294 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1295 ret = iio_trigger_register(data->motion_trig);
1297 data->motion_trig = NULL;
1298 goto err_trigger_unregister;
1302 ret = iio_triggered_buffer_setup(indio_dev,
1303 &iio_pollfunc_store_time,
1304 kxcjk1013_trigger_handler,
1305 &kxcjk1013_buffer_setup_ops);
1307 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1308 goto err_trigger_unregister;
1311 ret = pm_runtime_set_active(&client->dev);
1313 goto err_buffer_cleanup;
1315 pm_runtime_enable(&client->dev);
1316 pm_runtime_set_autosuspend_delay(&client->dev,
1317 KXCJK1013_SLEEP_DELAY_MS);
1318 pm_runtime_use_autosuspend(&client->dev);
1320 ret = iio_device_register(indio_dev);
1322 dev_err(&client->dev, "unable to register iio device\n");
1323 goto err_buffer_cleanup;
1329 if (data->dready_trig)
1330 iio_triggered_buffer_cleanup(indio_dev);
1331 err_trigger_unregister:
1332 if (data->dready_trig)
1333 iio_trigger_unregister(data->dready_trig);
1334 if (data->motion_trig)
1335 iio_trigger_unregister(data->motion_trig);
1337 kxcjk1013_set_mode(data, STANDBY);
1342 static int kxcjk1013_remove(struct i2c_client *client)
1344 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1345 struct kxcjk1013_data *data = iio_priv(indio_dev);
1347 iio_device_unregister(indio_dev);
1349 pm_runtime_disable(&client->dev);
1350 pm_runtime_set_suspended(&client->dev);
1351 pm_runtime_put_noidle(&client->dev);
1353 if (data->dready_trig) {
1354 iio_triggered_buffer_cleanup(indio_dev);
1355 iio_trigger_unregister(data->dready_trig);
1356 iio_trigger_unregister(data->motion_trig);
1359 mutex_lock(&data->mutex);
1360 kxcjk1013_set_mode(data, STANDBY);
1361 mutex_unlock(&data->mutex);
1366 #ifdef CONFIG_PM_SLEEP
1367 static int kxcjk1013_suspend(struct device *dev)
1369 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1370 struct kxcjk1013_data *data = iio_priv(indio_dev);
1373 mutex_lock(&data->mutex);
1374 ret = kxcjk1013_set_mode(data, STANDBY);
1375 mutex_unlock(&data->mutex);
1380 static int kxcjk1013_resume(struct device *dev)
1382 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1383 struct kxcjk1013_data *data = iio_priv(indio_dev);
1386 mutex_lock(&data->mutex);
1387 ret = kxcjk1013_set_mode(data, OPERATION);
1389 ret = kxcjk1013_set_range(data, data->range);
1390 mutex_unlock(&data->mutex);
1397 static int kxcjk1013_runtime_suspend(struct device *dev)
1399 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1400 struct kxcjk1013_data *data = iio_priv(indio_dev);
1403 ret = kxcjk1013_set_mode(data, STANDBY);
1405 dev_err(&data->client->dev, "powering off device failed\n");
1411 static int kxcjk1013_runtime_resume(struct device *dev)
1413 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1414 struct kxcjk1013_data *data = iio_priv(indio_dev);
1418 ret = kxcjk1013_set_mode(data, OPERATION);
1422 sleep_val = kxcjk1013_get_startup_times(data);
1423 if (sleep_val < 20000)
1424 usleep_range(sleep_val, 20000);
1426 msleep_interruptible(sleep_val/1000);
1432 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1433 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1434 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1435 kxcjk1013_runtime_resume, NULL)
1438 static const struct acpi_device_id kx_acpi_match[] = {
1439 {"KXCJ1013", KXCJK1013},
1440 {"KXCJ1008", KXCJ91008},
1441 {"KXCJ9000", KXCJ91008},
1442 {"KIOX000A", KXCJ91008},
1443 {"KIOX010A", KXCJ91008}, /* KXCJ91008 inside the display of a 2-in-1 */
1444 {"KXTJ1009", KXTJ21009},
1445 {"SMO8500", KXCJ91008},
1448 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1450 static const struct i2c_device_id kxcjk1013_id[] = {
1451 {"kxcjk1013", KXCJK1013},
1452 {"kxcj91008", KXCJ91008},
1453 {"kxtj21009", KXTJ21009},
1454 {"SMO8500", KXCJ91008},
1458 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1460 static struct i2c_driver kxcjk1013_driver = {
1462 .name = KXCJK1013_DRV_NAME,
1463 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1464 .pm = &kxcjk1013_pm_ops,
1466 .probe = kxcjk1013_probe,
1467 .remove = kxcjk1013_remove,
1468 .id_table = kxcjk1013_id,
1470 module_i2c_driver(kxcjk1013_driver);
1472 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1473 MODULE_LICENSE("GPL v2");
1474 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");