1 // SPDX-License-Identifier: GPL-2.0-only
3 * KXCJK-1013 3-axis accelerometer driver
4 * Copyright (c) 2014, Intel Corporation.
7 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <linux/delay.h>
11 #include <linux/bitops.h>
12 #include <linux/slab.h>
13 #include <linux/string.h>
14 #include <linux/acpi.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/iio/iio.h>
18 #include <linux/iio/sysfs.h>
19 #include <linux/iio/buffer.h>
20 #include <linux/iio/trigger.h>
21 #include <linux/iio/events.h>
22 #include <linux/iio/trigger_consumer.h>
23 #include <linux/iio/triggered_buffer.h>
24 #include <linux/iio/accel/kxcjk_1013.h>
26 #define KXCJK1013_DRV_NAME "kxcjk1013"
27 #define KXCJK1013_IRQ_NAME "kxcjk1013_event"
29 #define KXTF9_REG_HP_XOUT_L 0x00
30 #define KXTF9_REG_HP_XOUT_H 0x01
31 #define KXTF9_REG_HP_YOUT_L 0x02
32 #define KXTF9_REG_HP_YOUT_H 0x03
33 #define KXTF9_REG_HP_ZOUT_L 0x04
34 #define KXTF9_REG_HP_ZOUT_H 0x05
36 #define KXCJK1013_REG_XOUT_L 0x06
38 * From low byte X axis register, all the other addresses of Y and Z can be
39 * obtained by just applying axis offset. The following axis defines are just
40 * provide clarity, but not used.
42 #define KXCJK1013_REG_XOUT_H 0x07
43 #define KXCJK1013_REG_YOUT_L 0x08
44 #define KXCJK1013_REG_YOUT_H 0x09
45 #define KXCJK1013_REG_ZOUT_L 0x0A
46 #define KXCJK1013_REG_ZOUT_H 0x0B
48 #define KXCJK1013_REG_DCST_RESP 0x0C
49 #define KXCJK1013_REG_WHO_AM_I 0x0F
50 #define KXTF9_REG_TILT_POS_CUR 0x10
51 #define KXTF9_REG_TILT_POS_PREV 0x11
52 #define KXTF9_REG_INT_SRC1 0x15
53 #define KXCJK1013_REG_INT_SRC1 0x16 /* compatible, but called INT_SRC2 in KXTF9 ds */
54 #define KXCJK1013_REG_INT_SRC2 0x17
55 #define KXCJK1013_REG_STATUS_REG 0x18
56 #define KXCJK1013_REG_INT_REL 0x1A
57 #define KXCJK1013_REG_CTRL1 0x1B
58 #define KXTF9_REG_CTRL2 0x1C
59 #define KXCJK1013_REG_CTRL2 0x1D /* mostly compatible, CTRL_REG3 in KTXF9 ds */
60 #define KXCJK1013_REG_INT_CTRL1 0x1E
61 #define KXCJK1013_REG_INT_CTRL2 0x1F
62 #define KXTF9_REG_INT_CTRL3 0x20
63 #define KXCJK1013_REG_DATA_CTRL 0x21
64 #define KXTF9_REG_TILT_TIMER 0x28
65 #define KXCJK1013_REG_WAKE_TIMER 0x29
66 #define KXTF9_REG_TDT_TIMER 0x2B
67 #define KXTF9_REG_TDT_THRESH_H 0x2C
68 #define KXTF9_REG_TDT_THRESH_L 0x2D
69 #define KXTF9_REG_TDT_TAP_TIMER 0x2E
70 #define KXTF9_REG_TDT_TOTAL_TIMER 0x2F
71 #define KXTF9_REG_TDT_LATENCY_TIMER 0x30
72 #define KXTF9_REG_TDT_WINDOW_TIMER 0x31
73 #define KXCJK1013_REG_SELF_TEST 0x3A
74 #define KXTF9_REG_WAKE_THRESH 0x5A
75 #define KXTF9_REG_TILT_ANGLE 0x5C
76 #define KXTF9_REG_HYST_SET 0x5F
77 #define KXCJK1013_REG_WAKE_THRES 0x6A
79 #define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
80 #define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
81 #define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
82 #define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
83 #define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
84 #define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
86 #define KXCJK1013_REG_INT_CTRL1_BIT_IEU BIT(2) /* KXTF9 */
87 #define KXCJK1013_REG_INT_CTRL1_BIT_IEL BIT(3)
88 #define KXCJK1013_REG_INT_CTRL1_BIT_IEA BIT(4)
89 #define KXCJK1013_REG_INT_CTRL1_BIT_IEN BIT(5)
91 #define KXTF9_REG_TILT_BIT_LEFT_EDGE BIT(5)
92 #define KXTF9_REG_TILT_BIT_RIGHT_EDGE BIT(4)
93 #define KXTF9_REG_TILT_BIT_LOWER_EDGE BIT(3)
94 #define KXTF9_REG_TILT_BIT_UPPER_EDGE BIT(2)
95 #define KXTF9_REG_TILT_BIT_FACE_DOWN BIT(1)
96 #define KXTF9_REG_TILT_BIT_FACE_UP BIT(0)
98 #define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
99 #define KXCJK1013_MAX_STARTUP_TIME_US 100000
101 #define KXCJK1013_SLEEP_DELAY_MS 2000
103 #define KXCJK1013_REG_INT_SRC1_BIT_TPS BIT(0) /* KXTF9 */
104 #define KXCJK1013_REG_INT_SRC1_BIT_WUFS BIT(1)
105 #define KXCJK1013_REG_INT_SRC1_MASK_TDTS (BIT(2) | BIT(3)) /* KXTF9 */
106 #define KXCJK1013_REG_INT_SRC1_TAP_NONE 0
107 #define KXCJK1013_REG_INT_SRC1_TAP_SINGLE BIT(2)
108 #define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE BIT(3)
109 #define KXCJK1013_REG_INT_SRC1_BIT_DRDY BIT(4)
111 /* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
112 #define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
113 #define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
114 #define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
115 #define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
116 #define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
117 #define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
119 #define KXCJK1013_DEFAULT_WAKE_THRES 1
126 KX_MAX_CHIPS /* this must be last */
135 struct kxcjk1013_data {
136 struct i2c_client *client;
137 struct iio_trigger *dready_trig;
138 struct iio_trigger *motion_trig;
139 struct iio_mount_matrix orientation;
146 bool active_high_intr;
147 bool dready_trigger_on;
149 bool motion_trigger_on;
151 enum kx_chipset chipset;
152 enum kx_acpi_type acpi_type;
155 enum kxcjk1013_axis {
162 enum kxcjk1013_mode {
167 enum kxcjk1013_range {
180 static const struct kx_odr_map samp_freq_table[] = {
181 { 0, 781000, 0x08, 0x00 },
182 { 1, 563000, 0x09, 0x01 },
183 { 3, 125000, 0x0A, 0x02 },
184 { 6, 250000, 0x0B, 0x03 },
185 { 12, 500000, 0x00, 0x04 },
186 { 25, 0, 0x01, 0x05 },
187 { 50, 0, 0x02, 0x06 },
188 { 100, 0, 0x03, 0x06 },
189 { 200, 0, 0x04, 0x06 },
190 { 400, 0, 0x05, 0x06 },
191 { 800, 0, 0x06, 0x06 },
192 { 1600, 0, 0x07, 0x06 },
195 static const char *const kxcjk1013_samp_freq_avail =
196 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
198 static const struct kx_odr_map kxtf9_samp_freq_table[] = {
199 { 25, 0, 0x01, 0x00 },
200 { 50, 0, 0x02, 0x01 },
201 { 100, 0, 0x03, 0x01 },
202 { 200, 0, 0x04, 0x01 },
203 { 400, 0, 0x05, 0x01 },
204 { 800, 0, 0x06, 0x01 },
207 static const char *const kxtf9_samp_freq_avail =
208 "25 50 100 200 400 800";
210 /* Refer to section 4 of the specification */
211 static const struct {
214 } odr_start_up_times[KX_MAX_CHIPS][12] = {
271 static const struct {
275 } KXCJK1013_scale_table[] = { {9582, 0, 0},
280 enum kiox010a_fn_index {
281 KIOX010A_SET_LAPTOP_MODE = 1,
282 KIOX010A_SET_TABLET_MODE = 2,
285 static int kiox010a_dsm(struct device *dev, int fn_index)
287 acpi_handle handle = ACPI_HANDLE(dev);
288 guid_t kiox010a_dsm_guid;
289 union acpi_object *obj;
294 guid_parse("1f339696-d475-4e26-8cad-2e9f8e6d7a91", &kiox010a_dsm_guid);
296 obj = acpi_evaluate_dsm(handle, &kiox010a_dsm_guid, 1, fn_index, NULL);
305 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
306 enum kxcjk1013_mode mode)
310 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
312 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
317 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
319 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
321 ret = i2c_smbus_write_byte_data(data->client,
322 KXCJK1013_REG_CTRL1, ret);
324 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
331 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
332 enum kxcjk1013_mode *mode)
336 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
338 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
342 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
350 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
354 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
356 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
360 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
361 KXCJK1013_REG_CTRL1_BIT_GSEL1);
362 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
363 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
365 ret = i2c_smbus_write_byte_data(data->client,
369 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
373 data->range = range_index;
378 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
383 if (data->acpi_type == ACPI_KIOX010A) {
384 /* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
385 kiox010a_dsm(&data->client->dev, KIOX010A_SET_LAPTOP_MODE);
389 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
391 dev_err(&data->client->dev, "Error reading who_am_i\n");
395 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
397 ret = kxcjk1013_set_mode(data, STANDBY);
401 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
403 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
407 /* Set 12 bit mode */
408 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
410 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
413 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
417 /* Setting range to 4G */
418 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
422 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
424 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
428 data->odr_bits = ret;
430 /* Set up INT polarity */
431 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
433 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
437 if (data->active_high_intr)
438 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
440 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
442 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
445 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
449 ret = kxcjk1013_set_mode(data, OPERATION);
453 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
459 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
462 int idx = data->chipset;
464 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
465 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
466 return odr_start_up_times[idx][i].usec;
469 return KXCJK1013_MAX_STARTUP_TIME_US;
473 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
479 ret = pm_runtime_get_sync(&data->client->dev);
481 pm_runtime_mark_last_busy(&data->client->dev);
482 ret = pm_runtime_put_autosuspend(&data->client->dev);
485 dev_err(&data->client->dev,
486 "Failed: %s for %d\n", __func__, on);
488 pm_runtime_put_noidle(&data->client->dev);
496 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
500 ret = i2c_smbus_write_byte_data(data->client,
501 KXCJK1013_REG_WAKE_TIMER,
504 dev_err(&data->client->dev,
505 "Error writing reg_wake_timer\n");
509 waketh_reg = data->chipset == KXTF9 ?
510 KXTF9_REG_WAKE_THRESH : KXCJK1013_REG_WAKE_THRES;
511 ret = i2c_smbus_write_byte_data(data->client, waketh_reg,
514 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
521 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
525 enum kxcjk1013_mode store_mode;
527 ret = kxcjk1013_get_mode(data, &store_mode);
531 /* This is requirement by spec to change state to STANDBY */
532 ret = kxcjk1013_set_mode(data, STANDBY);
536 ret = kxcjk1013_chip_update_thresholds(data);
540 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
542 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
547 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
549 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
551 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
554 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
558 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
560 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
565 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
567 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
569 ret = i2c_smbus_write_byte_data(data->client,
570 KXCJK1013_REG_CTRL1, ret);
572 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
576 if (store_mode == OPERATION) {
577 ret = kxcjk1013_set_mode(data, OPERATION);
585 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
589 enum kxcjk1013_mode store_mode;
591 ret = kxcjk1013_get_mode(data, &store_mode);
595 /* This is requirement by spec to change state to STANDBY */
596 ret = kxcjk1013_set_mode(data, STANDBY);
600 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
602 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
607 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
609 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
611 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
614 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
618 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
620 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
625 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
627 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
629 ret = i2c_smbus_write_byte_data(data->client,
630 KXCJK1013_REG_CTRL1, ret);
632 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
636 if (store_mode == OPERATION) {
637 ret = kxcjk1013_set_mode(data, OPERATION);
645 static const struct kx_odr_map *kxcjk1013_find_odr_value(
646 const struct kx_odr_map *map, size_t map_size, int val, int val2)
650 for (i = 0; i < map_size; ++i) {
651 if (map[i].val == val && map[i].val2 == val2)
655 return ERR_PTR(-EINVAL);
658 static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
659 size_t map_size, int odr_bits,
664 for (i = 0; i < map_size; ++i) {
665 if (map[i].odr_bits == odr_bits) {
668 return IIO_VAL_INT_PLUS_MICRO;
675 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
678 enum kxcjk1013_mode store_mode;
679 const struct kx_odr_map *odr_setting;
681 ret = kxcjk1013_get_mode(data, &store_mode);
685 if (data->chipset == KXTF9)
686 odr_setting = kxcjk1013_find_odr_value(kxtf9_samp_freq_table,
687 ARRAY_SIZE(kxtf9_samp_freq_table),
690 odr_setting = kxcjk1013_find_odr_value(samp_freq_table,
691 ARRAY_SIZE(samp_freq_table),
694 if (IS_ERR(odr_setting))
695 return PTR_ERR(odr_setting);
697 /* To change ODR, the chip must be set to STANDBY as per spec */
698 ret = kxcjk1013_set_mode(data, STANDBY);
702 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
703 odr_setting->odr_bits);
705 dev_err(&data->client->dev, "Error writing data_ctrl\n");
709 data->odr_bits = odr_setting->odr_bits;
711 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
712 odr_setting->wuf_bits);
714 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
718 if (store_mode == OPERATION) {
719 ret = kxcjk1013_set_mode(data, OPERATION);
727 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
729 if (data->chipset == KXTF9)
730 return kxcjk1013_convert_odr_value(kxtf9_samp_freq_table,
731 ARRAY_SIZE(kxtf9_samp_freq_table),
732 data->odr_bits, val, val2);
734 return kxcjk1013_convert_odr_value(samp_freq_table,
735 ARRAY_SIZE(samp_freq_table),
736 data->odr_bits, val, val2);
739 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
741 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
744 ret = i2c_smbus_read_word_data(data->client, reg);
746 dev_err(&data->client->dev,
747 "failed to read accel_%c registers\n", 'x' + axis);
754 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
757 enum kxcjk1013_mode store_mode;
759 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
760 if (KXCJK1013_scale_table[i].scale == val) {
761 ret = kxcjk1013_get_mode(data, &store_mode);
765 ret = kxcjk1013_set_mode(data, STANDBY);
769 ret = kxcjk1013_set_range(data, i);
773 if (store_mode == OPERATION) {
774 ret = kxcjk1013_set_mode(data, OPERATION);
786 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
787 struct iio_chan_spec const *chan, int *val,
788 int *val2, long mask)
790 struct kxcjk1013_data *data = iio_priv(indio_dev);
794 case IIO_CHAN_INFO_RAW:
795 mutex_lock(&data->mutex);
796 if (iio_buffer_enabled(indio_dev))
799 ret = kxcjk1013_set_power_state(data, true);
801 mutex_unlock(&data->mutex);
804 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
806 kxcjk1013_set_power_state(data, false);
807 mutex_unlock(&data->mutex);
810 *val = sign_extend32(ret >> 4, 11);
811 ret = kxcjk1013_set_power_state(data, false);
813 mutex_unlock(&data->mutex);
820 case IIO_CHAN_INFO_SCALE:
822 *val2 = KXCJK1013_scale_table[data->range].scale;
823 return IIO_VAL_INT_PLUS_MICRO;
825 case IIO_CHAN_INFO_SAMP_FREQ:
826 mutex_lock(&data->mutex);
827 ret = kxcjk1013_get_odr(data, val, val2);
828 mutex_unlock(&data->mutex);
836 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
837 struct iio_chan_spec const *chan, int val,
840 struct kxcjk1013_data *data = iio_priv(indio_dev);
844 case IIO_CHAN_INFO_SAMP_FREQ:
845 mutex_lock(&data->mutex);
846 ret = kxcjk1013_set_odr(data, val, val2);
847 mutex_unlock(&data->mutex);
849 case IIO_CHAN_INFO_SCALE:
853 mutex_lock(&data->mutex);
854 ret = kxcjk1013_set_scale(data, val2);
855 mutex_unlock(&data->mutex);
864 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
865 const struct iio_chan_spec *chan,
866 enum iio_event_type type,
867 enum iio_event_direction dir,
868 enum iio_event_info info,
871 struct kxcjk1013_data *data = iio_priv(indio_dev);
875 case IIO_EV_INFO_VALUE:
876 *val = data->wake_thres;
878 case IIO_EV_INFO_PERIOD:
879 *val = data->wake_dur;
888 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
889 const struct iio_chan_spec *chan,
890 enum iio_event_type type,
891 enum iio_event_direction dir,
892 enum iio_event_info info,
895 struct kxcjk1013_data *data = iio_priv(indio_dev);
897 if (data->ev_enable_state)
901 case IIO_EV_INFO_VALUE:
902 data->wake_thres = val;
904 case IIO_EV_INFO_PERIOD:
905 data->wake_dur = val;
914 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
915 const struct iio_chan_spec *chan,
916 enum iio_event_type type,
917 enum iio_event_direction dir)
919 struct kxcjk1013_data *data = iio_priv(indio_dev);
921 return data->ev_enable_state;
924 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
925 const struct iio_chan_spec *chan,
926 enum iio_event_type type,
927 enum iio_event_direction dir,
930 struct kxcjk1013_data *data = iio_priv(indio_dev);
933 if (state && data->ev_enable_state)
936 mutex_lock(&data->mutex);
938 if (!state && data->motion_trigger_on) {
939 data->ev_enable_state = 0;
940 mutex_unlock(&data->mutex);
945 * We will expect the enable and disable to do operation in
946 * in reverse order. This will happen here anyway as our
947 * resume operation uses sync mode runtime pm calls, the
948 * suspend operation will be delayed by autosuspend delay
949 * So the disable operation will still happen in reverse of
950 * enable operation. When runtime pm is disabled the mode
951 * is always on so sequence doesn't matter
953 ret = kxcjk1013_set_power_state(data, state);
955 mutex_unlock(&data->mutex);
959 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
961 kxcjk1013_set_power_state(data, false);
962 data->ev_enable_state = 0;
963 mutex_unlock(&data->mutex);
967 data->ev_enable_state = state;
968 mutex_unlock(&data->mutex);
973 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
975 struct kxcjk1013_data *data = iio_priv(indio_dev);
977 return kxcjk1013_set_power_state(data, true);
980 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
982 struct kxcjk1013_data *data = iio_priv(indio_dev);
984 return kxcjk1013_set_power_state(data, false);
987 static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
988 struct device_attribute *attr,
991 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
992 struct kxcjk1013_data *data = iio_priv(indio_dev);
995 if (data->chipset == KXTF9)
996 str = kxtf9_samp_freq_avail;
998 str = kxcjk1013_samp_freq_avail;
1000 return sprintf(buf, "%s\n", str);
1003 static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
1004 kxcjk1013_get_samp_freq_avail, NULL, 0);
1006 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
1008 static struct attribute *kxcjk1013_attributes[] = {
1009 &iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
1010 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
1014 static const struct attribute_group kxcjk1013_attrs_group = {
1015 .attrs = kxcjk1013_attributes,
1018 static const struct iio_event_spec kxcjk1013_event = {
1019 .type = IIO_EV_TYPE_THRESH,
1020 .dir = IIO_EV_DIR_EITHER,
1021 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1022 BIT(IIO_EV_INFO_ENABLE) |
1023 BIT(IIO_EV_INFO_PERIOD)
1026 static const struct iio_mount_matrix *
1027 kxcjk1013_get_mount_matrix(const struct iio_dev *indio_dev,
1028 const struct iio_chan_spec *chan)
1030 struct kxcjk1013_data *data = iio_priv(indio_dev);
1032 return &data->orientation;
1035 static const struct iio_chan_spec_ext_info kxcjk1013_ext_info[] = {
1036 IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, kxcjk1013_get_mount_matrix),
1040 #define KXCJK1013_CHANNEL(_axis) { \
1041 .type = IIO_ACCEL, \
1043 .channel2 = IIO_MOD_##_axis, \
1044 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
1045 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
1046 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1047 .scan_index = AXIS_##_axis, \
1051 .storagebits = 16, \
1053 .endianness = IIO_LE, \
1055 .event_spec = &kxcjk1013_event, \
1056 .ext_info = kxcjk1013_ext_info, \
1057 .num_event_specs = 1 \
1060 static const struct iio_chan_spec kxcjk1013_channels[] = {
1061 KXCJK1013_CHANNEL(X),
1062 KXCJK1013_CHANNEL(Y),
1063 KXCJK1013_CHANNEL(Z),
1064 IIO_CHAN_SOFT_TIMESTAMP(3),
1067 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
1068 .preenable = kxcjk1013_buffer_preenable,
1069 .postdisable = kxcjk1013_buffer_postdisable,
1072 static const struct iio_info kxcjk1013_info = {
1073 .attrs = &kxcjk1013_attrs_group,
1074 .read_raw = kxcjk1013_read_raw,
1075 .write_raw = kxcjk1013_write_raw,
1076 .read_event_value = kxcjk1013_read_event,
1077 .write_event_value = kxcjk1013_write_event,
1078 .write_event_config = kxcjk1013_write_event_config,
1079 .read_event_config = kxcjk1013_read_event_config,
1082 static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
1084 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
1086 struct iio_poll_func *pf = p;
1087 struct iio_dev *indio_dev = pf->indio_dev;
1088 struct kxcjk1013_data *data = iio_priv(indio_dev);
1091 mutex_lock(&data->mutex);
1092 ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
1093 KXCJK1013_REG_XOUT_L,
1095 (u8 *)data->buffer);
1096 mutex_unlock(&data->mutex);
1100 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
1103 iio_trigger_notify_done(indio_dev->trig);
1108 static void kxcjk1013_trig_reen(struct iio_trigger *trig)
1110 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1111 struct kxcjk1013_data *data = iio_priv(indio_dev);
1114 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1116 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1119 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1122 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1123 struct kxcjk1013_data *data = iio_priv(indio_dev);
1126 mutex_lock(&data->mutex);
1128 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1129 data->motion_trigger_on = false;
1130 mutex_unlock(&data->mutex);
1134 ret = kxcjk1013_set_power_state(data, state);
1136 mutex_unlock(&data->mutex);
1139 if (data->motion_trig == trig)
1140 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1142 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1144 kxcjk1013_set_power_state(data, false);
1145 mutex_unlock(&data->mutex);
1148 if (data->motion_trig == trig)
1149 data->motion_trigger_on = state;
1151 data->dready_trigger_on = state;
1153 mutex_unlock(&data->mutex);
1158 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1159 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1160 .reenable = kxcjk1013_trig_reen,
1163 static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
1165 struct kxcjk1013_data *data = iio_priv(indio_dev);
1167 int ret = i2c_smbus_read_byte_data(data->client,
1168 KXCJK1013_REG_INT_SRC2);
1170 dev_err(&data->client->dev, "Error reading reg_int_src2\n");
1174 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1175 iio_push_event(indio_dev,
1176 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1180 IIO_EV_DIR_FALLING),
1183 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1184 iio_push_event(indio_dev,
1185 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1192 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1193 iio_push_event(indio_dev,
1194 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1198 IIO_EV_DIR_FALLING),
1201 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1202 iio_push_event(indio_dev,
1203 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1210 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1211 iio_push_event(indio_dev,
1212 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1216 IIO_EV_DIR_FALLING),
1219 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1220 iio_push_event(indio_dev,
1221 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1229 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1231 struct iio_dev *indio_dev = private;
1232 struct kxcjk1013_data *data = iio_priv(indio_dev);
1235 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1237 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1241 if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
1242 if (data->chipset == KXTF9)
1243 iio_push_event(indio_dev,
1244 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1246 IIO_MOD_X_AND_Y_AND_Z,
1251 kxcjk1013_report_motion_event(indio_dev);
1255 if (data->dready_trigger_on)
1258 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1260 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1265 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1267 struct iio_dev *indio_dev = private;
1268 struct kxcjk1013_data *data = iio_priv(indio_dev);
1270 data->timestamp = iio_get_time_ns(indio_dev);
1272 if (data->dready_trigger_on)
1273 iio_trigger_poll(data->dready_trig);
1274 else if (data->motion_trigger_on)
1275 iio_trigger_poll(data->motion_trig);
1277 if (data->ev_enable_state)
1278 return IRQ_WAKE_THREAD;
1283 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1284 enum kx_chipset *chipset,
1285 enum kx_acpi_type *acpi_type)
1287 const struct acpi_device_id *id;
1289 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1293 if (strcmp(id->id, "SMO8500") == 0)
1294 *acpi_type = ACPI_SMO8500;
1295 else if (strcmp(id->id, "KIOX010A") == 0)
1296 *acpi_type = ACPI_KIOX010A;
1298 *chipset = (enum kx_chipset)id->driver_data;
1300 return dev_name(dev);
1303 static int kxcjk1013_probe(struct i2c_client *client,
1304 const struct i2c_device_id *id)
1306 struct kxcjk1013_data *data;
1307 struct iio_dev *indio_dev;
1308 struct kxcjk_1013_platform_data *pdata;
1312 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1316 data = iio_priv(indio_dev);
1317 i2c_set_clientdata(client, indio_dev);
1318 data->client = client;
1320 pdata = dev_get_platdata(&client->dev);
1322 data->active_high_intr = pdata->active_high_intr;
1323 data->orientation = pdata->orientation;
1325 data->active_high_intr = true; /* default polarity */
1327 ret = iio_read_mount_matrix(&client->dev, "mount-matrix",
1328 &data->orientation);
1334 data->chipset = (enum kx_chipset)(id->driver_data);
1336 } else if (ACPI_HANDLE(&client->dev)) {
1337 name = kxcjk1013_match_acpi_device(&client->dev,
1343 ret = kxcjk1013_chip_init(data);
1347 mutex_init(&data->mutex);
1349 indio_dev->channels = kxcjk1013_channels;
1350 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1351 indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1352 indio_dev->name = name;
1353 indio_dev->modes = INDIO_DIRECT_MODE;
1354 indio_dev->info = &kxcjk1013_info;
1356 if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1357 ret = devm_request_threaded_irq(&client->dev, client->irq,
1358 kxcjk1013_data_rdy_trig_poll,
1359 kxcjk1013_event_handler,
1360 IRQF_TRIGGER_RISING,
1366 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1370 if (!data->dready_trig) {
1375 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1376 "%s-any-motion-dev%d",
1379 if (!data->motion_trig) {
1384 data->dready_trig->dev.parent = &client->dev;
1385 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1386 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1387 indio_dev->trig = data->dready_trig;
1388 iio_trigger_get(indio_dev->trig);
1389 ret = iio_trigger_register(data->dready_trig);
1393 data->motion_trig->dev.parent = &client->dev;
1394 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1395 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1396 ret = iio_trigger_register(data->motion_trig);
1398 data->motion_trig = NULL;
1399 goto err_trigger_unregister;
1403 ret = iio_triggered_buffer_setup(indio_dev,
1404 &iio_pollfunc_store_time,
1405 kxcjk1013_trigger_handler,
1406 &kxcjk1013_buffer_setup_ops);
1408 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1409 goto err_trigger_unregister;
1412 ret = pm_runtime_set_active(&client->dev);
1414 goto err_buffer_cleanup;
1416 pm_runtime_enable(&client->dev);
1417 pm_runtime_set_autosuspend_delay(&client->dev,
1418 KXCJK1013_SLEEP_DELAY_MS);
1419 pm_runtime_use_autosuspend(&client->dev);
1421 ret = iio_device_register(indio_dev);
1423 dev_err(&client->dev, "unable to register iio device\n");
1424 goto err_buffer_cleanup;
1430 if (data->dready_trig)
1431 iio_triggered_buffer_cleanup(indio_dev);
1432 err_trigger_unregister:
1433 if (data->dready_trig)
1434 iio_trigger_unregister(data->dready_trig);
1435 if (data->motion_trig)
1436 iio_trigger_unregister(data->motion_trig);
1438 kxcjk1013_set_mode(data, STANDBY);
1443 static int kxcjk1013_remove(struct i2c_client *client)
1445 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1446 struct kxcjk1013_data *data = iio_priv(indio_dev);
1448 iio_device_unregister(indio_dev);
1450 pm_runtime_disable(&client->dev);
1451 pm_runtime_set_suspended(&client->dev);
1452 pm_runtime_put_noidle(&client->dev);
1454 if (data->dready_trig) {
1455 iio_triggered_buffer_cleanup(indio_dev);
1456 iio_trigger_unregister(data->dready_trig);
1457 iio_trigger_unregister(data->motion_trig);
1460 mutex_lock(&data->mutex);
1461 kxcjk1013_set_mode(data, STANDBY);
1462 mutex_unlock(&data->mutex);
1467 #ifdef CONFIG_PM_SLEEP
1468 static int kxcjk1013_suspend(struct device *dev)
1470 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1471 struct kxcjk1013_data *data = iio_priv(indio_dev);
1474 mutex_lock(&data->mutex);
1475 ret = kxcjk1013_set_mode(data, STANDBY);
1476 mutex_unlock(&data->mutex);
1481 static int kxcjk1013_resume(struct device *dev)
1483 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1484 struct kxcjk1013_data *data = iio_priv(indio_dev);
1487 mutex_lock(&data->mutex);
1488 ret = kxcjk1013_set_mode(data, OPERATION);
1490 ret = kxcjk1013_set_range(data, data->range);
1491 mutex_unlock(&data->mutex);
1498 static int kxcjk1013_runtime_suspend(struct device *dev)
1500 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1501 struct kxcjk1013_data *data = iio_priv(indio_dev);
1504 ret = kxcjk1013_set_mode(data, STANDBY);
1506 dev_err(&data->client->dev, "powering off device failed\n");
1512 static int kxcjk1013_runtime_resume(struct device *dev)
1514 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1515 struct kxcjk1013_data *data = iio_priv(indio_dev);
1519 ret = kxcjk1013_set_mode(data, OPERATION);
1523 sleep_val = kxcjk1013_get_startup_times(data);
1524 if (sleep_val < 20000)
1525 usleep_range(sleep_val, 20000);
1527 msleep_interruptible(sleep_val/1000);
1533 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1534 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1535 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1536 kxcjk1013_runtime_resume, NULL)
1539 static const struct acpi_device_id kx_acpi_match[] = {
1540 {"KXCJ1013", KXCJK1013},
1541 {"KXCJ1008", KXCJ91008},
1542 {"KXCJ9000", KXCJ91008},
1543 {"KIOX0008", KXCJ91008},
1544 {"KIOX0009", KXTJ21009},
1545 {"KIOX000A", KXCJ91008},
1546 {"KIOX010A", KXCJ91008}, /* KXCJ91008 in the display of a yoga 2-in-1 */
1547 {"KIOX020A", KXCJ91008}, /* KXCJ91008 in the base of a yoga 2-in-1 */
1548 {"KXTJ1009", KXTJ21009},
1549 {"KXJ2109", KXTJ21009},
1550 {"SMO8500", KXCJ91008},
1553 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1555 static const struct i2c_device_id kxcjk1013_id[] = {
1556 {"kxcjk1013", KXCJK1013},
1557 {"kxcj91008", KXCJ91008},
1558 {"kxtj21009", KXTJ21009},
1560 {"SMO8500", KXCJ91008},
1564 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1566 static const struct of_device_id kxcjk1013_of_match[] = {
1567 { .compatible = "kionix,kxcjk1013", },
1568 { .compatible = "kionix,kxcj91008", },
1569 { .compatible = "kionix,kxtj21009", },
1570 { .compatible = "kionix,kxtf9", },
1573 MODULE_DEVICE_TABLE(of, kxcjk1013_of_match);
1575 static struct i2c_driver kxcjk1013_driver = {
1577 .name = KXCJK1013_DRV_NAME,
1578 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1579 .of_match_table = kxcjk1013_of_match,
1580 .pm = &kxcjk1013_pm_ops,
1582 .probe = kxcjk1013_probe,
1583 .remove = kxcjk1013_remove,
1584 .id_table = kxcjk1013_id,
1586 module_i2c_driver(kxcjk1013_driver);
1588 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1589 MODULE_LICENSE("GPL v2");
1590 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");