1 // SPDX-License-Identifier: GPL-2.0-only
3 * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
5 * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
7 * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
9 * SPI is not supported by driver
10 * BMA023/BMA150/SMB380: 7-bit I2C slave address 0x38
11 * BMA180: 7-bit I2C slave address 0x40 or 0x41
12 * BMA250: 7-bit I2C slave address 0x18 or 0x19
15 #include <linux/module.h>
16 #include <linux/i2c.h>
17 #include <linux/interrupt.h>
18 #include <linux/delay.h>
20 #include <linux/bitops.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.h>
23 #include <linux/string.h>
24 #include <linux/iio/iio.h>
25 #include <linux/iio/sysfs.h>
26 #include <linux/iio/buffer.h>
27 #include <linux/iio/trigger.h>
28 #include <linux/iio/trigger_consumer.h>
29 #include <linux/iio/triggered_buffer.h>
31 #define BMA180_DRV_NAME "bma180"
32 #define BMA180_IRQ_NAME "bma180_event"
43 struct bma180_part_info {
45 const struct iio_chan_spec *channels;
46 unsigned int num_channels;
47 const int *scale_table;
48 unsigned int num_scales;
53 u8 int_reset_reg, int_reset_mask;
54 u8 sleep_reg, sleep_mask;
55 u8 bw_reg, bw_mask, bw_offset;
56 u8 scale_reg, scale_mask;
57 u8 power_reg, power_mask, lowpower_val;
58 u8 int_enable_reg, int_enable_mask;
59 u8 softreset_reg, softreset_val;
61 int (*chip_config)(struct bma180_data *data);
62 void (*chip_disable)(struct bma180_data *data);
66 #define BMA023_CTRL_REG0 0x0a
67 #define BMA023_CTRL_REG1 0x0b
68 #define BMA023_CTRL_REG2 0x14
69 #define BMA023_CTRL_REG3 0x15
71 #define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */
72 #define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */
73 #define BMA023_SLEEP BIT(0)
74 #define BMA023_INT_RESET_MASK BIT(6)
75 #define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */
76 #define BMA023_RESET_VAL BIT(1)
78 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
79 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
80 #define BMA180_TEMP 0x08
81 #define BMA180_CTRL_REG0 0x0d
82 #define BMA180_RESET 0x10
83 #define BMA180_BW_TCS 0x20
84 #define BMA180_CTRL_REG3 0x21
85 #define BMA180_TCO_Z 0x30
86 #define BMA180_OFFSET_LSB1 0x35
88 /* BMA180_CTRL_REG0 bits */
89 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
90 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
91 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
92 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
94 /* BMA180_CTRL_REG3 bits */
95 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
97 /* BMA180_OFFSET_LSB1 skipping mode bit */
98 #define BMA180_SMP_SKIP BIT(0)
100 /* Bit masks for registers bit fields */
101 #define BMA180_RANGE 0x0e /* Range of measured accel values */
102 #define BMA180_BW 0xf0 /* Accel bandwidth */
103 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
105 /* We have to write this value in reset register to do soft reset */
106 #define BMA180_RESET_VAL 0xb6
108 #define BMA023_ID_REG_VAL 0x02
109 #define BMA180_ID_REG_VAL 0x03
110 #define BMA250_ID_REG_VAL 0x03
112 /* Chip power modes */
113 #define BMA180_LOW_POWER 0x03
115 #define BMA250_RANGE_REG 0x0f
116 #define BMA250_BW_REG 0x10
117 #define BMA250_POWER_REG 0x11
118 #define BMA250_RESET_REG 0x14
119 #define BMA250_INT_ENABLE_REG 0x17
120 #define BMA250_INT_MAP_REG 0x1a
121 #define BMA250_INT_RESET_REG 0x21
123 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
124 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
125 #define BMA250_BW_OFFSET 8
126 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
127 #define BMA250_LOWPOWER_MASK BIT(6)
128 #define BMA250_DATA_INTEN_MASK BIT(4)
129 #define BMA250_INT1_DATA_MASK BIT(0)
130 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
133 struct regulator *vdd_supply;
134 struct regulator *vddio_supply;
135 struct i2c_client *client;
136 struct iio_trigger *trig;
137 const struct bma180_part_info *part_info;
138 struct iio_mount_matrix orientation;
144 /* Ensure timestamp is naturally aligned */
147 s64 timestamp __aligned(8);
158 static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */
159 static int bma023_scale_table[] = { 2452, 4903, 9709, };
161 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
162 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
164 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250, 500, 1000 }; /* Hz */
165 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
168 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
172 if (data->sleep_state)
177 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
179 dev_err(&data->client->dev, "failed to read temp register\n");
182 ret = i2c_smbus_read_word_data(data->client,
183 BMA180_ACC_X_LSB + chan * 2);
185 dev_err(&data->client->dev,
186 "failed to read accel_%c register\n",
193 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
195 int ret = i2c_smbus_read_byte_data(data->client, reg);
196 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
201 return i2c_smbus_write_byte_data(data->client, reg, reg_val);
204 static int bma180_reset_intr(struct bma180_data *data)
206 int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
207 data->part_info->int_reset_mask, 1);
210 dev_err(&data->client->dev, "failed to reset interrupt\n");
215 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
217 int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
218 data->part_info->int_enable_mask, state);
221 ret = bma180_reset_intr(data);
228 dev_err(&data->client->dev,
229 "failed to set new data interrupt state %d\n", state);
233 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
235 int ret = bma180_set_bits(data, data->part_info->sleep_reg,
236 data->part_info->sleep_mask, state);
239 dev_err(&data->client->dev,
240 "failed to set sleep state %d\n", state);
243 data->sleep_state = state;
248 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
250 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
253 dev_err(&data->client->dev,
254 "failed to set ee writing state %d\n", state);
259 static int bma180_set_bw(struct bma180_data *data, int val)
263 if (data->sleep_state)
266 for (i = 0; i < data->part_info->num_bw; ++i) {
267 if (data->part_info->bw_table[i] == val) {
268 ret = bma180_set_bits(data, data->part_info->bw_reg,
269 data->part_info->bw_mask,
270 i + data->part_info->bw_offset);
272 dev_err(&data->client->dev,
273 "failed to set bandwidth\n");
284 static int bma180_set_scale(struct bma180_data *data, int val)
288 if (data->sleep_state)
291 for (i = 0; i < data->part_info->num_scales; ++i)
292 if (data->part_info->scale_table[i] == val) {
293 ret = bma180_set_bits(data, data->part_info->scale_reg,
294 data->part_info->scale_mask, i);
296 dev_err(&data->client->dev,
297 "failed to set scale\n");
307 static int bma180_set_pmode(struct bma180_data *data, bool mode)
309 u8 reg_val = mode ? data->part_info->lowpower_val : 0;
310 int ret = bma180_set_bits(data, data->part_info->power_reg,
311 data->part_info->power_mask, reg_val);
314 dev_err(&data->client->dev, "failed to set power mode\n");
322 static int bma180_soft_reset(struct bma180_data *data)
324 int ret = i2c_smbus_write_byte_data(data->client,
325 data->part_info->softreset_reg,
326 data->part_info->softreset_val);
329 dev_err(&data->client->dev, "failed to reset the chip\n");
334 static int bma180_chip_init(struct bma180_data *data)
336 /* Try to read chip_id register. It must return 0x03. */
337 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
341 if (ret != data->part_info->chip_id) {
342 dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
343 ret, data->part_info->chip_id);
347 ret = bma180_soft_reset(data);
351 * No serial transaction should occur within minimum 10 us
352 * after soft_reset command
356 return bma180_set_new_data_intr_state(data, false);
359 static int bma023_chip_config(struct bma180_data *data)
361 int ret = bma180_chip_init(data);
366 ret = bma180_set_bw(data, 50); /* 50 Hz */
369 ret = bma180_set_scale(data, 2452); /* 2 G */
376 dev_err(&data->client->dev, "failed to config the chip\n");
380 static int bma180_chip_config(struct bma180_data *data)
382 int ret = bma180_chip_init(data);
386 ret = bma180_set_pmode(data, false);
389 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
392 ret = bma180_set_ee_writing_state(data, true);
395 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
398 ret = bma180_set_bw(data, 20); /* 20 Hz */
401 ret = bma180_set_scale(data, 2452); /* 2 G */
408 dev_err(&data->client->dev, "failed to config the chip\n");
412 static int bma250_chip_config(struct bma180_data *data)
414 int ret = bma180_chip_init(data);
418 ret = bma180_set_pmode(data, false);
421 ret = bma180_set_bw(data, 16); /* 16 Hz */
424 ret = bma180_set_scale(data, 38344); /* 2 G */
428 * This enables dataready interrupt on the INT1 pin
429 * FIXME: support using the INT2 pin
431 ret = bma180_set_bits(data, BMA250_INT_MAP_REG, BMA250_INT1_DATA_MASK, 1);
438 dev_err(&data->client->dev, "failed to config the chip\n");
442 static void bma023_chip_disable(struct bma180_data *data)
444 if (bma180_set_sleep_state(data, true))
450 dev_err(&data->client->dev, "failed to disable the chip\n");
453 static void bma180_chip_disable(struct bma180_data *data)
455 if (bma180_set_new_data_intr_state(data, false))
457 if (bma180_set_ee_writing_state(data, false))
459 if (bma180_set_sleep_state(data, true))
465 dev_err(&data->client->dev, "failed to disable the chip\n");
468 static void bma250_chip_disable(struct bma180_data *data)
470 if (bma180_set_new_data_intr_state(data, false))
472 if (bma180_set_sleep_state(data, true))
478 dev_err(&data->client->dev, "failed to disable the chip\n");
481 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
487 for (i = 0; i < n; i++) {
490 len += scnprintf(buf + len, PAGE_SIZE - len,
491 micros ? "0.%06d " : "%d ", vals[i]);
498 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
499 struct device_attribute *attr, char *buf)
501 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
503 return bma180_show_avail(buf, data->part_info->bw_table,
504 data->part_info->num_bw, false);
507 static ssize_t bma180_show_scale_avail(struct device *dev,
508 struct device_attribute *attr, char *buf)
510 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
512 return bma180_show_avail(buf, data->part_info->scale_table,
513 data->part_info->num_scales, true);
516 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
517 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
519 static IIO_DEVICE_ATTR(in_accel_scale_available,
520 S_IRUGO, bma180_show_scale_avail, NULL, 0);
522 static struct attribute *bma180_attributes[] = {
523 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
525 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
529 static const struct attribute_group bma180_attrs_group = {
530 .attrs = bma180_attributes,
533 static int bma180_read_raw(struct iio_dev *indio_dev,
534 struct iio_chan_spec const *chan, int *val, int *val2,
537 struct bma180_data *data = iio_priv(indio_dev);
541 case IIO_CHAN_INFO_RAW:
542 ret = iio_device_claim_direct_mode(indio_dev);
546 mutex_lock(&data->mutex);
547 ret = bma180_get_data_reg(data, chan->scan_index);
548 mutex_unlock(&data->mutex);
549 iio_device_release_direct_mode(indio_dev);
552 if (chan->scan_type.sign == 's') {
553 *val = sign_extend32(ret >> chan->scan_type.shift,
554 chan->scan_type.realbits - 1);
559 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
562 case IIO_CHAN_INFO_SCALE:
563 switch (chan->type) {
567 return IIO_VAL_INT_PLUS_MICRO;
574 case IIO_CHAN_INFO_OFFSET:
575 *val = data->part_info->temp_offset;
582 static int bma180_write_raw(struct iio_dev *indio_dev,
583 struct iio_chan_spec const *chan, int val, int val2, long mask)
585 struct bma180_data *data = iio_priv(indio_dev);
589 case IIO_CHAN_INFO_SCALE:
592 mutex_lock(&data->mutex);
593 ret = bma180_set_scale(data, val2);
594 mutex_unlock(&data->mutex);
596 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
599 mutex_lock(&data->mutex);
600 ret = bma180_set_bw(data, val);
601 mutex_unlock(&data->mutex);
608 static const struct iio_info bma180_info = {
609 .attrs = &bma180_attrs_group,
610 .read_raw = bma180_read_raw,
611 .write_raw = bma180_write_raw,
614 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
616 static int bma180_get_power_mode(struct iio_dev *indio_dev,
617 const struct iio_chan_spec *chan)
619 struct bma180_data *data = iio_priv(indio_dev);
624 static int bma180_set_power_mode(struct iio_dev *indio_dev,
625 const struct iio_chan_spec *chan, unsigned int mode)
627 struct bma180_data *data = iio_priv(indio_dev);
630 mutex_lock(&data->mutex);
631 ret = bma180_set_pmode(data, mode);
632 mutex_unlock(&data->mutex);
637 static const struct iio_mount_matrix *
638 bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
639 const struct iio_chan_spec *chan)
641 struct bma180_data *data = iio_priv(indio_dev);
643 return &data->orientation;
646 static const struct iio_enum bma180_power_mode_enum = {
647 .items = bma180_power_modes,
648 .num_items = ARRAY_SIZE(bma180_power_modes),
649 .get = bma180_get_power_mode,
650 .set = bma180_set_power_mode,
653 static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
654 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
658 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
659 IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
660 IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
661 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
665 #define BMA023_ACC_CHANNEL(_axis, _bits) { \
668 .channel2 = IIO_MOD_##_axis, \
669 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
670 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
671 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
672 .scan_index = AXIS_##_axis, \
677 .shift = 16 - _bits, \
679 .ext_info = bma023_ext_info, \
682 #define BMA150_TEMP_CHANNEL { \
684 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
685 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
686 .scan_index = TEMP, \
694 #define BMA180_ACC_CHANNEL(_axis, _bits) { \
697 .channel2 = IIO_MOD_##_axis, \
698 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
699 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
700 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
701 .scan_index = AXIS_##_axis, \
706 .shift = 16 - _bits, \
708 .ext_info = bma180_ext_info, \
711 #define BMA180_TEMP_CHANNEL { \
713 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
714 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
715 .scan_index = TEMP, \
723 static const struct iio_chan_spec bma023_channels[] = {
724 BMA023_ACC_CHANNEL(X, 10),
725 BMA023_ACC_CHANNEL(Y, 10),
726 BMA023_ACC_CHANNEL(Z, 10),
727 IIO_CHAN_SOFT_TIMESTAMP(4),
730 static const struct iio_chan_spec bma150_channels[] = {
731 BMA023_ACC_CHANNEL(X, 10),
732 BMA023_ACC_CHANNEL(Y, 10),
733 BMA023_ACC_CHANNEL(Z, 10),
735 IIO_CHAN_SOFT_TIMESTAMP(4),
738 static const struct iio_chan_spec bma180_channels[] = {
739 BMA180_ACC_CHANNEL(X, 14),
740 BMA180_ACC_CHANNEL(Y, 14),
741 BMA180_ACC_CHANNEL(Z, 14),
743 IIO_CHAN_SOFT_TIMESTAMP(4),
746 static const struct iio_chan_spec bma250_channels[] = {
747 BMA180_ACC_CHANNEL(X, 10),
748 BMA180_ACC_CHANNEL(Y, 10),
749 BMA180_ACC_CHANNEL(Z, 10),
751 IIO_CHAN_SOFT_TIMESTAMP(4),
754 static const struct bma180_part_info bma180_part_info[] = {
756 .chip_id = BMA023_ID_REG_VAL,
757 .channels = bma023_channels,
758 .num_channels = ARRAY_SIZE(bma023_channels),
759 .scale_table = bma023_scale_table,
760 .num_scales = ARRAY_SIZE(bma023_scale_table),
761 .bw_table = bma023_bw_table,
762 .num_bw = ARRAY_SIZE(bma023_bw_table),
763 /* No temperature channel */
765 .int_reset_reg = BMA023_CTRL_REG0,
766 .int_reset_mask = BMA023_INT_RESET_MASK,
767 .sleep_reg = BMA023_CTRL_REG0,
768 .sleep_mask = BMA023_SLEEP,
769 .bw_reg = BMA023_CTRL_REG2,
770 .bw_mask = BMA023_BW_MASK,
771 .scale_reg = BMA023_CTRL_REG2,
772 .scale_mask = BMA023_RANGE_MASK,
773 /* No power mode on bma023 */
777 .int_enable_reg = BMA023_CTRL_REG3,
778 .int_enable_mask = BMA023_NEW_DATA_INT,
779 .softreset_reg = BMA023_CTRL_REG0,
780 .softreset_val = BMA023_RESET_VAL,
781 .chip_config = bma023_chip_config,
782 .chip_disable = bma023_chip_disable,
785 .chip_id = BMA023_ID_REG_VAL,
786 .channels = bma150_channels,
787 .num_channels = ARRAY_SIZE(bma150_channels),
788 .scale_table = bma023_scale_table,
789 .num_scales = ARRAY_SIZE(bma023_scale_table),
790 .bw_table = bma023_bw_table,
791 .num_bw = ARRAY_SIZE(bma023_bw_table),
792 .temp_offset = -60, /* 0 LSB @ -30 degree C */
793 .int_reset_reg = BMA023_CTRL_REG0,
794 .int_reset_mask = BMA023_INT_RESET_MASK,
795 .sleep_reg = BMA023_CTRL_REG0,
796 .sleep_mask = BMA023_SLEEP,
797 .bw_reg = BMA023_CTRL_REG2,
798 .bw_mask = BMA023_BW_MASK,
799 .scale_reg = BMA023_CTRL_REG2,
800 .scale_mask = BMA023_RANGE_MASK,
801 /* No power mode on bma150 */
805 .int_enable_reg = BMA023_CTRL_REG3,
806 .int_enable_mask = BMA023_NEW_DATA_INT,
807 .softreset_reg = BMA023_CTRL_REG0,
808 .softreset_val = BMA023_RESET_VAL,
809 .chip_config = bma023_chip_config,
810 .chip_disable = bma023_chip_disable,
813 .chip_id = BMA180_ID_REG_VAL,
814 .channels = bma180_channels,
815 .num_channels = ARRAY_SIZE(bma180_channels),
816 .scale_table = bma180_scale_table,
817 .num_scales = ARRAY_SIZE(bma180_scale_table),
818 .bw_table = bma180_bw_table,
819 .num_bw = ARRAY_SIZE(bma180_bw_table),
820 .temp_offset = 48, /* 0 LSB @ 24 degree C */
821 .int_reset_reg = BMA180_CTRL_REG0,
822 .int_reset_mask = BMA180_RESET_INT,
823 .sleep_reg = BMA180_CTRL_REG0,
824 .sleep_mask = BMA180_SLEEP,
825 .bw_reg = BMA180_BW_TCS,
826 .bw_mask = BMA180_BW,
827 .scale_reg = BMA180_OFFSET_LSB1,
828 .scale_mask = BMA180_RANGE,
829 .power_reg = BMA180_TCO_Z,
830 .power_mask = BMA180_MODE_CONFIG,
831 .lowpower_val = BMA180_LOW_POWER,
832 .int_enable_reg = BMA180_CTRL_REG3,
833 .int_enable_mask = BMA180_NEW_DATA_INT,
834 .softreset_reg = BMA180_RESET,
835 .softreset_val = BMA180_RESET_VAL,
836 .chip_config = bma180_chip_config,
837 .chip_disable = bma180_chip_disable,
840 .chip_id = BMA250_ID_REG_VAL,
841 .channels = bma250_channels,
842 .num_channels = ARRAY_SIZE(bma250_channels),
843 .scale_table = bma250_scale_table,
844 .num_scales = ARRAY_SIZE(bma250_scale_table),
845 .bw_table = bma250_bw_table,
846 .num_bw = ARRAY_SIZE(bma250_bw_table),
847 .temp_offset = 48, /* 0 LSB @ 24 degree C */
848 .int_reset_reg = BMA250_INT_RESET_REG,
849 .int_reset_mask = BMA250_INT_RESET_MASK,
850 .sleep_reg = BMA250_POWER_REG,
851 .sleep_mask = BMA250_SUSPEND_MASK,
852 .bw_reg = BMA250_BW_REG,
853 .bw_mask = BMA250_BW_MASK,
854 .bw_offset = BMA250_BW_OFFSET,
855 .scale_reg = BMA250_RANGE_REG,
856 .scale_mask = BMA250_RANGE_MASK,
857 .power_reg = BMA250_POWER_REG,
858 .power_mask = BMA250_LOWPOWER_MASK,
860 .int_enable_reg = BMA250_INT_ENABLE_REG,
861 .int_enable_mask = BMA250_DATA_INTEN_MASK,
862 .softreset_reg = BMA250_RESET_REG,
863 .softreset_val = BMA180_RESET_VAL,
864 .chip_config = bma250_chip_config,
865 .chip_disable = bma250_chip_disable,
869 static irqreturn_t bma180_trigger_handler(int irq, void *p)
871 struct iio_poll_func *pf = p;
872 struct iio_dev *indio_dev = pf->indio_dev;
873 struct bma180_data *data = iio_priv(indio_dev);
874 s64 time_ns = iio_get_time_ns(indio_dev);
877 mutex_lock(&data->mutex);
879 for_each_set_bit(bit, indio_dev->active_scan_mask,
880 indio_dev->masklength) {
881 ret = bma180_get_data_reg(data, bit);
883 mutex_unlock(&data->mutex);
886 data->scan.chan[i++] = ret;
889 mutex_unlock(&data->mutex);
891 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
893 iio_trigger_notify_done(indio_dev->trig);
898 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
901 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
902 struct bma180_data *data = iio_priv(indio_dev);
904 return bma180_set_new_data_intr_state(data, state);
907 static void bma180_trig_reen(struct iio_trigger *trig)
909 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
910 struct bma180_data *data = iio_priv(indio_dev);
913 ret = bma180_reset_intr(data);
915 dev_err(&data->client->dev, "failed to reset interrupt\n");
918 static const struct iio_trigger_ops bma180_trigger_ops = {
919 .set_trigger_state = bma180_data_rdy_trigger_set_state,
920 .reenable = bma180_trig_reen,
923 static int bma180_probe(struct i2c_client *client)
925 const struct i2c_device_id *id = i2c_client_get_device_id(client);
926 struct device *dev = &client->dev;
927 struct bma180_data *data;
928 struct iio_dev *indio_dev;
931 indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
935 data = iio_priv(indio_dev);
936 i2c_set_clientdata(client, indio_dev);
937 data->client = client;
938 data->part_info = i2c_get_match_data(client);
940 ret = iio_read_mount_matrix(dev, &data->orientation);
944 data->vdd_supply = devm_regulator_get(dev, "vdd");
945 if (IS_ERR(data->vdd_supply))
946 return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
947 "Failed to get vdd regulator\n");
949 data->vddio_supply = devm_regulator_get(dev, "vddio");
950 if (IS_ERR(data->vddio_supply))
951 return dev_err_probe(dev, PTR_ERR(data->vddio_supply),
952 "Failed to get vddio regulator\n");
954 /* Typical voltage 2.4V these are min and max */
955 ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
958 ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
961 ret = regulator_enable(data->vdd_supply);
963 dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
966 ret = regulator_enable(data->vddio_supply);
968 dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
969 goto err_disable_vdd;
971 /* Wait to make sure we started up properly (3 ms at least) */
972 usleep_range(3000, 5000);
974 ret = data->part_info->chip_config(data);
976 goto err_chip_disable;
978 mutex_init(&data->mutex);
979 indio_dev->channels = data->part_info->channels;
980 indio_dev->num_channels = data->part_info->num_channels;
981 indio_dev->name = id->name;
982 indio_dev->modes = INDIO_DIRECT_MODE;
983 indio_dev->info = &bma180_info;
985 if (client->irq > 0) {
986 data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
987 iio_device_id(indio_dev));
990 goto err_chip_disable;
993 ret = devm_request_irq(dev, client->irq,
994 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
995 "bma180_event", data->trig);
997 dev_err(dev, "unable to request IRQ\n");
998 goto err_trigger_free;
1001 data->trig->ops = &bma180_trigger_ops;
1002 iio_trigger_set_drvdata(data->trig, indio_dev);
1004 ret = iio_trigger_register(data->trig);
1006 goto err_trigger_free;
1008 indio_dev->trig = iio_trigger_get(data->trig);
1011 ret = iio_triggered_buffer_setup(indio_dev, NULL,
1012 bma180_trigger_handler, NULL);
1014 dev_err(dev, "unable to setup iio triggered buffer\n");
1015 goto err_trigger_unregister;
1018 ret = iio_device_register(indio_dev);
1020 dev_err(dev, "unable to register iio device\n");
1021 goto err_buffer_cleanup;
1027 iio_triggered_buffer_cleanup(indio_dev);
1028 err_trigger_unregister:
1030 iio_trigger_unregister(data->trig);
1032 iio_trigger_free(data->trig);
1034 data->part_info->chip_disable(data);
1035 regulator_disable(data->vddio_supply);
1037 regulator_disable(data->vdd_supply);
1042 static void bma180_remove(struct i2c_client *client)
1044 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1045 struct bma180_data *data = iio_priv(indio_dev);
1047 iio_device_unregister(indio_dev);
1048 iio_triggered_buffer_cleanup(indio_dev);
1050 iio_trigger_unregister(data->trig);
1051 iio_trigger_free(data->trig);
1054 mutex_lock(&data->mutex);
1055 data->part_info->chip_disable(data);
1056 mutex_unlock(&data->mutex);
1057 regulator_disable(data->vddio_supply);
1058 regulator_disable(data->vdd_supply);
1061 static int bma180_suspend(struct device *dev)
1063 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1064 struct bma180_data *data = iio_priv(indio_dev);
1067 mutex_lock(&data->mutex);
1068 ret = bma180_set_sleep_state(data, true);
1069 mutex_unlock(&data->mutex);
1074 static int bma180_resume(struct device *dev)
1076 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1077 struct bma180_data *data = iio_priv(indio_dev);
1080 mutex_lock(&data->mutex);
1081 ret = bma180_set_sleep_state(data, false);
1082 mutex_unlock(&data->mutex);
1087 static DEFINE_SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
1089 static const struct i2c_device_id bma180_ids[] = {
1090 { "bma023", (kernel_ulong_t)&bma180_part_info[BMA023] },
1091 { "bma150", (kernel_ulong_t)&bma180_part_info[BMA150] },
1092 { "bma180", (kernel_ulong_t)&bma180_part_info[BMA180] },
1093 { "bma250", (kernel_ulong_t)&bma180_part_info[BMA250] },
1094 { "smb380", (kernel_ulong_t)&bma180_part_info[BMA150] },
1098 MODULE_DEVICE_TABLE(i2c, bma180_ids);
1100 static const struct of_device_id bma180_of_match[] = {
1102 .compatible = "bosch,bma023",
1103 .data = &bma180_part_info[BMA023]
1106 .compatible = "bosch,bma150",
1107 .data = &bma180_part_info[BMA150]
1110 .compatible = "bosch,bma180",
1111 .data = &bma180_part_info[BMA180]
1114 .compatible = "bosch,bma250",
1115 .data = &bma180_part_info[BMA250]
1118 .compatible = "bosch,smb380",
1119 .data = &bma180_part_info[BMA150]
1123 MODULE_DEVICE_TABLE(of, bma180_of_match);
1125 static struct i2c_driver bma180_driver = {
1128 .pm = pm_sleep_ptr(&bma180_pm_ops),
1129 .of_match_table = bma180_of_match,
1131 .probe = bma180_probe,
1132 .remove = bma180_remove,
1133 .id_table = bma180_ids,
1136 module_i2c_driver(bma180_driver);
1138 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
1139 MODULE_AUTHOR("Texas Instruments, Inc.");
1140 MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA250 triaxial acceleration sensor");
1141 MODULE_LICENSE("GPL");