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>
19 #include <linux/of_device.h>
21 #include <linux/bitops.h>
22 #include <linux/regulator/consumer.h>
23 #include <linux/slab.h>
24 #include <linux/string.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/trigger_consumer.h>
30 #include <linux/iio/triggered_buffer.h>
32 #define BMA180_DRV_NAME "bma180"
33 #define BMA180_IRQ_NAME "bma180_event"
44 struct bma180_part_info {
46 const struct iio_chan_spec *channels;
47 unsigned int num_channels;
48 const int *scale_table;
49 unsigned int num_scales;
54 u8 int_reset_reg, int_reset_mask;
55 u8 sleep_reg, sleep_mask;
56 u8 bw_reg, bw_mask, bw_offset;
57 u8 scale_reg, scale_mask;
58 u8 power_reg, power_mask, lowpower_val;
59 u8 int_enable_reg, int_enable_mask;
60 u8 softreset_reg, softreset_val;
62 int (*chip_config)(struct bma180_data *data);
63 void (*chip_disable)(struct bma180_data *data);
67 #define BMA023_CTRL_REG0 0x0a
68 #define BMA023_CTRL_REG1 0x0b
69 #define BMA023_CTRL_REG2 0x14
70 #define BMA023_CTRL_REG3 0x15
72 #define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */
73 #define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */
74 #define BMA023_SLEEP BIT(0)
75 #define BMA023_INT_RESET_MASK BIT(6)
76 #define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */
77 #define BMA023_RESET_VAL BIT(1)
79 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
80 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
81 #define BMA180_TEMP 0x08
82 #define BMA180_CTRL_REG0 0x0d
83 #define BMA180_RESET 0x10
84 #define BMA180_BW_TCS 0x20
85 #define BMA180_CTRL_REG3 0x21
86 #define BMA180_TCO_Z 0x30
87 #define BMA180_OFFSET_LSB1 0x35
89 /* BMA180_CTRL_REG0 bits */
90 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
91 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
92 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
93 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
95 /* BMA180_CTRL_REG3 bits */
96 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
98 /* BMA180_OFFSET_LSB1 skipping mode bit */
99 #define BMA180_SMP_SKIP BIT(0)
101 /* Bit masks for registers bit fields */
102 #define BMA180_RANGE 0x0e /* Range of measured accel values */
103 #define BMA180_BW 0xf0 /* Accel bandwidth */
104 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
106 /* We have to write this value in reset register to do soft reset */
107 #define BMA180_RESET_VAL 0xb6
109 #define BMA023_ID_REG_VAL 0x02
110 #define BMA180_ID_REG_VAL 0x03
111 #define BMA250_ID_REG_VAL 0x03
113 /* Chip power modes */
114 #define BMA180_LOW_POWER 0x03
116 #define BMA250_RANGE_REG 0x0f
117 #define BMA250_BW_REG 0x10
118 #define BMA250_POWER_REG 0x11
119 #define BMA250_RESET_REG 0x14
120 #define BMA250_INT_ENABLE_REG 0x17
121 #define BMA250_INT_MAP_REG 0x1a
122 #define BMA250_INT_RESET_REG 0x21
124 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
125 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
126 #define BMA250_BW_OFFSET 8
127 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
128 #define BMA250_LOWPOWER_MASK BIT(6)
129 #define BMA250_DATA_INTEN_MASK BIT(4)
130 #define BMA250_INT1_DATA_MASK BIT(0)
131 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
134 struct regulator *vdd_supply;
135 struct regulator *vddio_supply;
136 struct i2c_client *client;
137 struct iio_trigger *trig;
138 const struct bma180_part_info *part_info;
139 struct iio_mount_matrix orientation;
145 /* Ensure timestamp is naturally aligned */
148 s64 timestamp __aligned(8);
159 static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */
160 static int bma023_scale_table[] = { 2452, 4903, 9709, };
162 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
163 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
165 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250, 500, 1000 }; /* Hz */
166 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
169 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
173 if (data->sleep_state)
178 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
180 dev_err(&data->client->dev, "failed to read temp register\n");
183 ret = i2c_smbus_read_word_data(data->client,
184 BMA180_ACC_X_LSB + chan * 2);
186 dev_err(&data->client->dev,
187 "failed to read accel_%c register\n",
194 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
196 int ret = i2c_smbus_read_byte_data(data->client, reg);
197 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
202 return i2c_smbus_write_byte_data(data->client, reg, reg_val);
205 static int bma180_reset_intr(struct bma180_data *data)
207 int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
208 data->part_info->int_reset_mask, 1);
211 dev_err(&data->client->dev, "failed to reset interrupt\n");
216 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
218 int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
219 data->part_info->int_enable_mask, state);
222 ret = bma180_reset_intr(data);
229 dev_err(&data->client->dev,
230 "failed to set new data interrupt state %d\n", state);
234 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
236 int ret = bma180_set_bits(data, data->part_info->sleep_reg,
237 data->part_info->sleep_mask, state);
240 dev_err(&data->client->dev,
241 "failed to set sleep state %d\n", state);
244 data->sleep_state = state;
249 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
251 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
254 dev_err(&data->client->dev,
255 "failed to set ee writing state %d\n", state);
260 static int bma180_set_bw(struct bma180_data *data, int val)
264 if (data->sleep_state)
267 for (i = 0; i < data->part_info->num_bw; ++i) {
268 if (data->part_info->bw_table[i] == val) {
269 ret = bma180_set_bits(data, data->part_info->bw_reg,
270 data->part_info->bw_mask,
271 i + data->part_info->bw_offset);
273 dev_err(&data->client->dev,
274 "failed to set bandwidth\n");
285 static int bma180_set_scale(struct bma180_data *data, int val)
289 if (data->sleep_state)
292 for (i = 0; i < data->part_info->num_scales; ++i)
293 if (data->part_info->scale_table[i] == val) {
294 ret = bma180_set_bits(data, data->part_info->scale_reg,
295 data->part_info->scale_mask, i);
297 dev_err(&data->client->dev,
298 "failed to set scale\n");
308 static int bma180_set_pmode(struct bma180_data *data, bool mode)
310 u8 reg_val = mode ? data->part_info->lowpower_val : 0;
311 int ret = bma180_set_bits(data, data->part_info->power_reg,
312 data->part_info->power_mask, reg_val);
315 dev_err(&data->client->dev, "failed to set power mode\n");
323 static int bma180_soft_reset(struct bma180_data *data)
325 int ret = i2c_smbus_write_byte_data(data->client,
326 data->part_info->softreset_reg,
327 data->part_info->softreset_val);
330 dev_err(&data->client->dev, "failed to reset the chip\n");
335 static int bma180_chip_init(struct bma180_data *data)
337 /* Try to read chip_id register. It must return 0x03. */
338 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
342 if (ret != data->part_info->chip_id) {
343 dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
344 ret, data->part_info->chip_id);
348 ret = bma180_soft_reset(data);
352 * No serial transaction should occur within minimum 10 us
353 * after soft_reset command
357 return bma180_set_new_data_intr_state(data, false);
360 static int bma023_chip_config(struct bma180_data *data)
362 int ret = bma180_chip_init(data);
367 ret = bma180_set_bw(data, 50); /* 50 Hz */
370 ret = bma180_set_scale(data, 2452); /* 2 G */
377 dev_err(&data->client->dev, "failed to config the chip\n");
381 static int bma180_chip_config(struct bma180_data *data)
383 int ret = bma180_chip_init(data);
387 ret = bma180_set_pmode(data, false);
390 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
393 ret = bma180_set_ee_writing_state(data, true);
396 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
399 ret = bma180_set_bw(data, 20); /* 20 Hz */
402 ret = bma180_set_scale(data, 2452); /* 2 G */
409 dev_err(&data->client->dev, "failed to config the chip\n");
413 static int bma250_chip_config(struct bma180_data *data)
415 int ret = bma180_chip_init(data);
419 ret = bma180_set_pmode(data, false);
422 ret = bma180_set_bw(data, 16); /* 16 Hz */
425 ret = bma180_set_scale(data, 38344); /* 2 G */
429 * This enables dataready interrupt on the INT1 pin
430 * FIXME: support using the INT2 pin
432 ret = bma180_set_bits(data, BMA250_INT_MAP_REG, BMA250_INT1_DATA_MASK, 1);
439 dev_err(&data->client->dev, "failed to config the chip\n");
443 static void bma023_chip_disable(struct bma180_data *data)
445 if (bma180_set_sleep_state(data, true))
451 dev_err(&data->client->dev, "failed to disable the chip\n");
454 static void bma180_chip_disable(struct bma180_data *data)
456 if (bma180_set_new_data_intr_state(data, false))
458 if (bma180_set_ee_writing_state(data, false))
460 if (bma180_set_sleep_state(data, true))
466 dev_err(&data->client->dev, "failed to disable the chip\n");
469 static void bma250_chip_disable(struct bma180_data *data)
471 if (bma180_set_new_data_intr_state(data, false))
473 if (bma180_set_sleep_state(data, true))
479 dev_err(&data->client->dev, "failed to disable the chip\n");
482 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
488 for (i = 0; i < n; i++) {
491 len += scnprintf(buf + len, PAGE_SIZE - len,
492 micros ? "0.%06d " : "%d ", vals[i]);
499 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
500 struct device_attribute *attr, char *buf)
502 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
504 return bma180_show_avail(buf, data->part_info->bw_table,
505 data->part_info->num_bw, false);
508 static ssize_t bma180_show_scale_avail(struct device *dev,
509 struct device_attribute *attr, char *buf)
511 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
513 return bma180_show_avail(buf, data->part_info->scale_table,
514 data->part_info->num_scales, true);
517 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
518 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
520 static IIO_DEVICE_ATTR(in_accel_scale_available,
521 S_IRUGO, bma180_show_scale_avail, NULL, 0);
523 static struct attribute *bma180_attributes[] = {
524 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
526 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
530 static const struct attribute_group bma180_attrs_group = {
531 .attrs = bma180_attributes,
534 static int bma180_read_raw(struct iio_dev *indio_dev,
535 struct iio_chan_spec const *chan, int *val, int *val2,
538 struct bma180_data *data = iio_priv(indio_dev);
542 case IIO_CHAN_INFO_RAW:
543 ret = iio_device_claim_direct_mode(indio_dev);
547 mutex_lock(&data->mutex);
548 ret = bma180_get_data_reg(data, chan->scan_index);
549 mutex_unlock(&data->mutex);
550 iio_device_release_direct_mode(indio_dev);
553 if (chan->scan_type.sign == 's') {
554 *val = sign_extend32(ret >> chan->scan_type.shift,
555 chan->scan_type.realbits - 1);
560 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
563 case IIO_CHAN_INFO_SCALE:
564 switch (chan->type) {
568 return IIO_VAL_INT_PLUS_MICRO;
575 case IIO_CHAN_INFO_OFFSET:
576 *val = data->part_info->temp_offset;
583 static int bma180_write_raw(struct iio_dev *indio_dev,
584 struct iio_chan_spec const *chan, int val, int val2, long mask)
586 struct bma180_data *data = iio_priv(indio_dev);
590 case IIO_CHAN_INFO_SCALE:
593 mutex_lock(&data->mutex);
594 ret = bma180_set_scale(data, val2);
595 mutex_unlock(&data->mutex);
597 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
600 mutex_lock(&data->mutex);
601 ret = bma180_set_bw(data, val);
602 mutex_unlock(&data->mutex);
609 static const struct iio_info bma180_info = {
610 .attrs = &bma180_attrs_group,
611 .read_raw = bma180_read_raw,
612 .write_raw = bma180_write_raw,
615 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
617 static int bma180_get_power_mode(struct iio_dev *indio_dev,
618 const struct iio_chan_spec *chan)
620 struct bma180_data *data = iio_priv(indio_dev);
625 static int bma180_set_power_mode(struct iio_dev *indio_dev,
626 const struct iio_chan_spec *chan, unsigned int mode)
628 struct bma180_data *data = iio_priv(indio_dev);
631 mutex_lock(&data->mutex);
632 ret = bma180_set_pmode(data, mode);
633 mutex_unlock(&data->mutex);
638 static const struct iio_mount_matrix *
639 bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
640 const struct iio_chan_spec *chan)
642 struct bma180_data *data = iio_priv(indio_dev);
644 return &data->orientation;
647 static const struct iio_enum bma180_power_mode_enum = {
648 .items = bma180_power_modes,
649 .num_items = ARRAY_SIZE(bma180_power_modes),
650 .get = bma180_get_power_mode,
651 .set = bma180_set_power_mode,
654 static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
655 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
659 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
660 IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
661 IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
662 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
666 #define BMA023_ACC_CHANNEL(_axis, _bits) { \
669 .channel2 = IIO_MOD_##_axis, \
670 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
671 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
672 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
673 .scan_index = AXIS_##_axis, \
678 .shift = 16 - _bits, \
680 .ext_info = bma023_ext_info, \
683 #define BMA150_TEMP_CHANNEL { \
685 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
686 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
687 .scan_index = TEMP, \
695 #define BMA180_ACC_CHANNEL(_axis, _bits) { \
698 .channel2 = IIO_MOD_##_axis, \
699 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
700 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
701 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
702 .scan_index = AXIS_##_axis, \
707 .shift = 16 - _bits, \
709 .ext_info = bma180_ext_info, \
712 #define BMA180_TEMP_CHANNEL { \
714 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
715 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
716 .scan_index = TEMP, \
724 static const struct iio_chan_spec bma023_channels[] = {
725 BMA023_ACC_CHANNEL(X, 10),
726 BMA023_ACC_CHANNEL(Y, 10),
727 BMA023_ACC_CHANNEL(Z, 10),
728 IIO_CHAN_SOFT_TIMESTAMP(4),
731 static const struct iio_chan_spec bma150_channels[] = {
732 BMA023_ACC_CHANNEL(X, 10),
733 BMA023_ACC_CHANNEL(Y, 10),
734 BMA023_ACC_CHANNEL(Z, 10),
736 IIO_CHAN_SOFT_TIMESTAMP(4),
739 static const struct iio_chan_spec bma180_channels[] = {
740 BMA180_ACC_CHANNEL(X, 14),
741 BMA180_ACC_CHANNEL(Y, 14),
742 BMA180_ACC_CHANNEL(Z, 14),
744 IIO_CHAN_SOFT_TIMESTAMP(4),
747 static const struct iio_chan_spec bma250_channels[] = {
748 BMA180_ACC_CHANNEL(X, 10),
749 BMA180_ACC_CHANNEL(Y, 10),
750 BMA180_ACC_CHANNEL(Z, 10),
752 IIO_CHAN_SOFT_TIMESTAMP(4),
755 static const struct bma180_part_info bma180_part_info[] = {
757 .chip_id = BMA023_ID_REG_VAL,
758 .channels = bma023_channels,
759 .num_channels = ARRAY_SIZE(bma023_channels),
760 .scale_table = bma023_scale_table,
761 .num_scales = ARRAY_SIZE(bma023_scale_table),
762 .bw_table = bma023_bw_table,
763 .num_bw = ARRAY_SIZE(bma023_bw_table),
764 /* No temperature channel */
766 .int_reset_reg = BMA023_CTRL_REG0,
767 .int_reset_mask = BMA023_INT_RESET_MASK,
768 .sleep_reg = BMA023_CTRL_REG0,
769 .sleep_mask = BMA023_SLEEP,
770 .bw_reg = BMA023_CTRL_REG2,
771 .bw_mask = BMA023_BW_MASK,
772 .scale_reg = BMA023_CTRL_REG2,
773 .scale_mask = BMA023_RANGE_MASK,
774 /* No power mode on bma023 */
778 .int_enable_reg = BMA023_CTRL_REG3,
779 .int_enable_mask = BMA023_NEW_DATA_INT,
780 .softreset_reg = BMA023_CTRL_REG0,
781 .softreset_val = BMA023_RESET_VAL,
782 .chip_config = bma023_chip_config,
783 .chip_disable = bma023_chip_disable,
786 .chip_id = BMA023_ID_REG_VAL,
787 .channels = bma150_channels,
788 .num_channels = ARRAY_SIZE(bma150_channels),
789 .scale_table = bma023_scale_table,
790 .num_scales = ARRAY_SIZE(bma023_scale_table),
791 .bw_table = bma023_bw_table,
792 .num_bw = ARRAY_SIZE(bma023_bw_table),
793 .temp_offset = -60, /* 0 LSB @ -30 degree C */
794 .int_reset_reg = BMA023_CTRL_REG0,
795 .int_reset_mask = BMA023_INT_RESET_MASK,
796 .sleep_reg = BMA023_CTRL_REG0,
797 .sleep_mask = BMA023_SLEEP,
798 .bw_reg = BMA023_CTRL_REG2,
799 .bw_mask = BMA023_BW_MASK,
800 .scale_reg = BMA023_CTRL_REG2,
801 .scale_mask = BMA023_RANGE_MASK,
802 /* No power mode on bma150 */
806 .int_enable_reg = BMA023_CTRL_REG3,
807 .int_enable_mask = BMA023_NEW_DATA_INT,
808 .softreset_reg = BMA023_CTRL_REG0,
809 .softreset_val = BMA023_RESET_VAL,
810 .chip_config = bma023_chip_config,
811 .chip_disable = bma023_chip_disable,
814 .chip_id = BMA180_ID_REG_VAL,
815 .channels = bma180_channels,
816 .num_channels = ARRAY_SIZE(bma180_channels),
817 .scale_table = bma180_scale_table,
818 .num_scales = ARRAY_SIZE(bma180_scale_table),
819 .bw_table = bma180_bw_table,
820 .num_bw = ARRAY_SIZE(bma180_bw_table),
821 .temp_offset = 48, /* 0 LSB @ 24 degree C */
822 .int_reset_reg = BMA180_CTRL_REG0,
823 .int_reset_mask = BMA180_RESET_INT,
824 .sleep_reg = BMA180_CTRL_REG0,
825 .sleep_mask = BMA180_SLEEP,
826 .bw_reg = BMA180_BW_TCS,
827 .bw_mask = BMA180_BW,
828 .scale_reg = BMA180_OFFSET_LSB1,
829 .scale_mask = BMA180_RANGE,
830 .power_reg = BMA180_TCO_Z,
831 .power_mask = BMA180_MODE_CONFIG,
832 .lowpower_val = BMA180_LOW_POWER,
833 .int_enable_reg = BMA180_CTRL_REG3,
834 .int_enable_mask = BMA180_NEW_DATA_INT,
835 .softreset_reg = BMA180_RESET,
836 .softreset_val = BMA180_RESET_VAL,
837 .chip_config = bma180_chip_config,
838 .chip_disable = bma180_chip_disable,
841 .chip_id = BMA250_ID_REG_VAL,
842 .channels = bma250_channels,
843 .num_channels = ARRAY_SIZE(bma250_channels),
844 .scale_table = bma250_scale_table,
845 .num_scales = ARRAY_SIZE(bma250_scale_table),
846 .bw_table = bma250_bw_table,
847 .num_bw = ARRAY_SIZE(bma250_bw_table),
848 .temp_offset = 48, /* 0 LSB @ 24 degree C */
849 .int_reset_reg = BMA250_INT_RESET_REG,
850 .int_reset_mask = BMA250_INT_RESET_MASK,
851 .sleep_reg = BMA250_POWER_REG,
852 .sleep_mask = BMA250_SUSPEND_MASK,
853 .bw_reg = BMA250_BW_REG,
854 .bw_mask = BMA250_BW_MASK,
855 .bw_offset = BMA250_BW_OFFSET,
856 .scale_reg = BMA250_RANGE_REG,
857 .scale_mask = BMA250_RANGE_MASK,
858 .power_reg = BMA250_POWER_REG,
859 .power_mask = BMA250_LOWPOWER_MASK,
861 .int_enable_reg = BMA250_INT_ENABLE_REG,
862 .int_enable_mask = BMA250_DATA_INTEN_MASK,
863 .softreset_reg = BMA250_RESET_REG,
864 .softreset_val = BMA180_RESET_VAL,
865 .chip_config = bma250_chip_config,
866 .chip_disable = bma250_chip_disable,
870 static irqreturn_t bma180_trigger_handler(int irq, void *p)
872 struct iio_poll_func *pf = p;
873 struct iio_dev *indio_dev = pf->indio_dev;
874 struct bma180_data *data = iio_priv(indio_dev);
875 s64 time_ns = iio_get_time_ns(indio_dev);
878 mutex_lock(&data->mutex);
880 for_each_set_bit(bit, indio_dev->active_scan_mask,
881 indio_dev->masklength) {
882 ret = bma180_get_data_reg(data, bit);
884 mutex_unlock(&data->mutex);
887 data->scan.chan[i++] = ret;
890 mutex_unlock(&data->mutex);
892 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
894 iio_trigger_notify_done(indio_dev->trig);
899 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
902 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
903 struct bma180_data *data = iio_priv(indio_dev);
905 return bma180_set_new_data_intr_state(data, state);
908 static void bma180_trig_reen(struct iio_trigger *trig)
910 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
911 struct bma180_data *data = iio_priv(indio_dev);
914 ret = bma180_reset_intr(data);
916 dev_err(&data->client->dev, "failed to reset interrupt\n");
919 static const struct iio_trigger_ops bma180_trigger_ops = {
920 .set_trigger_state = bma180_data_rdy_trigger_set_state,
921 .reenable = bma180_trig_reen,
924 static int bma180_probe(struct i2c_client *client,
925 const struct i2c_device_id *id)
927 struct device *dev = &client->dev;
928 struct bma180_data *data;
929 struct iio_dev *indio_dev;
933 indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
937 data = iio_priv(indio_dev);
938 i2c_set_clientdata(client, indio_dev);
939 data->client = client;
940 if (client->dev.of_node)
941 chip = (enum chip_ids)of_device_get_match_data(dev);
943 chip = id->driver_data;
944 data->part_info = &bma180_part_info[chip];
946 ret = iio_read_mount_matrix(dev, &data->orientation);
950 data->vdd_supply = devm_regulator_get(dev, "vdd");
951 if (IS_ERR(data->vdd_supply))
952 return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
953 "Failed to get vdd regulator\n");
955 data->vddio_supply = devm_regulator_get(dev, "vddio");
956 if (IS_ERR(data->vddio_supply))
957 return dev_err_probe(dev, PTR_ERR(data->vddio_supply),
958 "Failed to get vddio regulator\n");
960 /* Typical voltage 2.4V these are min and max */
961 ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
964 ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
967 ret = regulator_enable(data->vdd_supply);
969 dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
972 ret = regulator_enable(data->vddio_supply);
974 dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
975 goto err_disable_vdd;
977 /* Wait to make sure we started up properly (3 ms at least) */
978 usleep_range(3000, 5000);
980 ret = data->part_info->chip_config(data);
982 goto err_chip_disable;
984 mutex_init(&data->mutex);
985 indio_dev->channels = data->part_info->channels;
986 indio_dev->num_channels = data->part_info->num_channels;
987 indio_dev->name = id->name;
988 indio_dev->modes = INDIO_DIRECT_MODE;
989 indio_dev->info = &bma180_info;
991 if (client->irq > 0) {
992 data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name,
993 iio_device_id(indio_dev));
996 goto err_chip_disable;
999 ret = devm_request_irq(dev, client->irq,
1000 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
1001 "bma180_event", data->trig);
1003 dev_err(dev, "unable to request IRQ\n");
1004 goto err_trigger_free;
1007 data->trig->ops = &bma180_trigger_ops;
1008 iio_trigger_set_drvdata(data->trig, indio_dev);
1009 indio_dev->trig = iio_trigger_get(data->trig);
1011 ret = iio_trigger_register(data->trig);
1013 goto err_trigger_free;
1016 ret = iio_triggered_buffer_setup(indio_dev, NULL,
1017 bma180_trigger_handler, NULL);
1019 dev_err(dev, "unable to setup iio triggered buffer\n");
1020 goto err_trigger_unregister;
1023 ret = iio_device_register(indio_dev);
1025 dev_err(dev, "unable to register iio device\n");
1026 goto err_buffer_cleanup;
1032 iio_triggered_buffer_cleanup(indio_dev);
1033 err_trigger_unregister:
1035 iio_trigger_unregister(data->trig);
1037 iio_trigger_free(data->trig);
1039 data->part_info->chip_disable(data);
1040 regulator_disable(data->vddio_supply);
1042 regulator_disable(data->vdd_supply);
1047 static int bma180_remove(struct i2c_client *client)
1049 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1050 struct bma180_data *data = iio_priv(indio_dev);
1052 iio_device_unregister(indio_dev);
1053 iio_triggered_buffer_cleanup(indio_dev);
1055 iio_trigger_unregister(data->trig);
1056 iio_trigger_free(data->trig);
1059 mutex_lock(&data->mutex);
1060 data->part_info->chip_disable(data);
1061 mutex_unlock(&data->mutex);
1062 regulator_disable(data->vddio_supply);
1063 regulator_disable(data->vdd_supply);
1068 #ifdef CONFIG_PM_SLEEP
1069 static int bma180_suspend(struct device *dev)
1071 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1072 struct bma180_data *data = iio_priv(indio_dev);
1075 mutex_lock(&data->mutex);
1076 ret = bma180_set_sleep_state(data, true);
1077 mutex_unlock(&data->mutex);
1082 static int bma180_resume(struct device *dev)
1084 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1085 struct bma180_data *data = iio_priv(indio_dev);
1088 mutex_lock(&data->mutex);
1089 ret = bma180_set_sleep_state(data, false);
1090 mutex_unlock(&data->mutex);
1095 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
1096 #define BMA180_PM_OPS (&bma180_pm_ops)
1098 #define BMA180_PM_OPS NULL
1101 static const struct i2c_device_id bma180_ids[] = {
1102 { "bma023", BMA023 },
1103 { "bma150", BMA150 },
1104 { "bma180", BMA180 },
1105 { "bma250", BMA250 },
1106 { "smb380", BMA150 },
1110 MODULE_DEVICE_TABLE(i2c, bma180_ids);
1112 static const struct of_device_id bma180_of_match[] = {
1114 .compatible = "bosch,bma023",
1115 .data = (void *)BMA023
1118 .compatible = "bosch,bma150",
1119 .data = (void *)BMA150
1122 .compatible = "bosch,bma180",
1123 .data = (void *)BMA180
1126 .compatible = "bosch,bma250",
1127 .data = (void *)BMA250
1130 .compatible = "bosch,smb380",
1131 .data = (void *)BMA150
1135 MODULE_DEVICE_TABLE(of, bma180_of_match);
1137 static struct i2c_driver bma180_driver = {
1140 .pm = BMA180_PM_OPS,
1141 .of_match_table = bma180_of_match,
1143 .probe = bma180_probe,
1144 .remove = bma180_remove,
1145 .id_table = bma180_ids,
1148 module_i2c_driver(bma180_driver);
1150 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
1151 MODULE_AUTHOR("Texas Instruments, Inc.");
1152 MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA250 triaxial acceleration sensor");
1153 MODULE_LICENSE("GPL");