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
13 * BMA254: 7-bit I2C slave address 0x18 or 0x19
16 #include <linux/module.h>
17 #include <linux/i2c.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include <linux/of_device.h>
22 #include <linux/bitops.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/slab.h>
25 #include <linux/string.h>
26 #include <linux/iio/iio.h>
27 #include <linux/iio/sysfs.h>
28 #include <linux/iio/buffer.h>
29 #include <linux/iio/trigger.h>
30 #include <linux/iio/trigger_consumer.h>
31 #include <linux/iio/triggered_buffer.h>
33 #define BMA180_DRV_NAME "bma180"
34 #define BMA180_IRQ_NAME "bma180_event"
46 struct bma180_part_info {
48 const struct iio_chan_spec *channels;
49 unsigned int num_channels;
50 const int *scale_table;
51 unsigned int num_scales;
56 u8 int_reset_reg, int_reset_mask;
57 u8 sleep_reg, sleep_mask;
58 u8 bw_reg, bw_mask, bw_offset;
59 u8 scale_reg, scale_mask;
60 u8 power_reg, power_mask, lowpower_val;
61 u8 int_enable_reg, int_enable_mask;
62 u8 int_map_reg, int_enable_dataready_int1_mask;
63 u8 softreset_reg, softreset_val;
65 int (*chip_config)(struct bma180_data *data);
66 void (*chip_disable)(struct bma180_data *data);
70 #define BMA023_CTRL_REG0 0x0a
71 #define BMA023_CTRL_REG1 0x0b
72 #define BMA023_CTRL_REG2 0x14
73 #define BMA023_CTRL_REG3 0x15
75 #define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */
76 #define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */
77 #define BMA023_SLEEP BIT(0)
78 #define BMA023_INT_RESET_MASK BIT(6)
79 #define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */
80 #define BMA023_RESET_VAL BIT(1)
82 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
83 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
84 #define BMA180_TEMP 0x08
85 #define BMA180_CTRL_REG0 0x0d
86 #define BMA180_RESET 0x10
87 #define BMA180_BW_TCS 0x20
88 #define BMA180_CTRL_REG3 0x21
89 #define BMA180_TCO_Z 0x30
90 #define BMA180_OFFSET_LSB1 0x35
92 /* BMA180_CTRL_REG0 bits */
93 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
94 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
95 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
96 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
98 /* BMA180_CTRL_REG3 bits */
99 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
101 /* BMA180_OFFSET_LSB1 skipping mode bit */
102 #define BMA180_SMP_SKIP BIT(0)
104 /* Bit masks for registers bit fields */
105 #define BMA180_RANGE 0x0e /* Range of measured accel values */
106 #define BMA180_BW 0xf0 /* Accel bandwidth */
107 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
109 /* We have to write this value in reset register to do soft reset */
110 #define BMA180_RESET_VAL 0xb6
112 #define BMA023_ID_REG_VAL 0x02
113 #define BMA180_ID_REG_VAL 0x03
114 #define BMA250_ID_REG_VAL 0x03
115 #define BMA254_ID_REG_VAL 0xfa /* 250 decimal */
117 /* Chip power modes */
118 #define BMA180_LOW_POWER 0x03
120 #define BMA250_RANGE_REG 0x0f
121 #define BMA250_BW_REG 0x10
122 #define BMA250_POWER_REG 0x11
123 #define BMA250_RESET_REG 0x14
124 #define BMA250_INT_ENABLE_REG 0x17
125 #define BMA250_INT_MAP_REG 0x1a
126 #define BMA250_INT_RESET_REG 0x21
128 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
129 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
130 #define BMA250_BW_OFFSET 8
131 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
132 #define BMA250_LOWPOWER_MASK BIT(6)
133 #define BMA250_DATA_INTEN_MASK BIT(4)
134 #define BMA250_INT1_DATA_MASK BIT(0)
135 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
137 #define BMA254_RANGE_REG 0x0f
138 #define BMA254_BW_REG 0x10
139 #define BMA254_POWER_REG 0x11
140 #define BMA254_RESET_REG 0x14
141 #define BMA254_INT_ENABLE_REG 0x17
142 #define BMA254_INT_MAP_REG 0x1a
143 #define BMA254_INT_RESET_REG 0x21
145 #define BMA254_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
146 #define BMA254_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
147 #define BMA254_BW_OFFSET 8
148 #define BMA254_SUSPEND_MASK BIT(7) /* chip will sleep */
149 #define BMA254_LOWPOWER_MASK BIT(6)
150 #define BMA254_DATA_INTEN_MASK BIT(4)
151 #define BMA254_INT2_DATA_MASK BIT(7)
152 #define BMA254_INT1_DATA_MASK BIT(0)
153 #define BMA254_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
156 struct regulator *vdd_supply;
157 struct regulator *vddio_supply;
158 struct i2c_client *client;
159 struct iio_trigger *trig;
160 const struct bma180_part_info *part_info;
161 struct iio_mount_matrix orientation;
167 /* Ensure timestamp is naturally aligned */
170 s64 timestamp __aligned(8);
181 static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */
182 static int bma023_scale_table[] = { 2452, 4903, 9709, };
184 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
185 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
187 static int bma25x_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
188 static int bma25x_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
191 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
195 if (data->sleep_state)
200 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
202 dev_err(&data->client->dev, "failed to read temp register\n");
205 ret = i2c_smbus_read_word_data(data->client,
206 BMA180_ACC_X_LSB + chan * 2);
208 dev_err(&data->client->dev,
209 "failed to read accel_%c register\n",
216 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
218 int ret = i2c_smbus_read_byte_data(data->client, reg);
219 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
224 return i2c_smbus_write_byte_data(data->client, reg, reg_val);
227 static int bma180_reset_intr(struct bma180_data *data)
229 int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
230 data->part_info->int_reset_mask, 1);
233 dev_err(&data->client->dev, "failed to reset interrupt\n");
238 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
240 int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
241 data->part_info->int_enable_mask, state);
244 ret = bma180_reset_intr(data);
251 dev_err(&data->client->dev,
252 "failed to set new data interrupt state %d\n", state);
256 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
258 int ret = bma180_set_bits(data, data->part_info->sleep_reg,
259 data->part_info->sleep_mask, state);
262 dev_err(&data->client->dev,
263 "failed to set sleep state %d\n", state);
266 data->sleep_state = state;
271 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
273 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
276 dev_err(&data->client->dev,
277 "failed to set ee writing state %d\n", state);
282 static int bma180_set_bw(struct bma180_data *data, int val)
286 if (data->sleep_state)
289 for (i = 0; i < data->part_info->num_bw; ++i) {
290 if (data->part_info->bw_table[i] == val) {
291 ret = bma180_set_bits(data, data->part_info->bw_reg,
292 data->part_info->bw_mask,
293 i + data->part_info->bw_offset);
295 dev_err(&data->client->dev,
296 "failed to set bandwidth\n");
307 static int bma180_set_scale(struct bma180_data *data, int val)
311 if (data->sleep_state)
314 for (i = 0; i < data->part_info->num_scales; ++i)
315 if (data->part_info->scale_table[i] == val) {
316 ret = bma180_set_bits(data, data->part_info->scale_reg,
317 data->part_info->scale_mask, i);
319 dev_err(&data->client->dev,
320 "failed to set scale\n");
330 static int bma180_set_pmode(struct bma180_data *data, bool mode)
332 u8 reg_val = mode ? data->part_info->lowpower_val : 0;
333 int ret = bma180_set_bits(data, data->part_info->power_reg,
334 data->part_info->power_mask, reg_val);
337 dev_err(&data->client->dev, "failed to set power mode\n");
345 static int bma180_soft_reset(struct bma180_data *data)
347 int ret = i2c_smbus_write_byte_data(data->client,
348 data->part_info->softreset_reg,
349 data->part_info->softreset_val);
352 dev_err(&data->client->dev, "failed to reset the chip\n");
357 static int bma180_chip_init(struct bma180_data *data)
359 /* Try to read chip_id register. It must return 0x03. */
360 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
364 if (ret != data->part_info->chip_id) {
365 dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
366 ret, data->part_info->chip_id);
370 ret = bma180_soft_reset(data);
374 * No serial transaction should occur within minimum 10 us
375 * after soft_reset command
379 return bma180_set_new_data_intr_state(data, false);
382 static int bma023_chip_config(struct bma180_data *data)
384 int ret = bma180_chip_init(data);
389 ret = bma180_set_bw(data, 50); /* 50 Hz */
392 ret = bma180_set_scale(data, 2452); /* 2 G */
399 dev_err(&data->client->dev, "failed to config the chip\n");
403 static int bma180_chip_config(struct bma180_data *data)
405 int ret = bma180_chip_init(data);
409 ret = bma180_set_pmode(data, false);
412 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
415 ret = bma180_set_ee_writing_state(data, true);
418 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
421 ret = bma180_set_bw(data, 20); /* 20 Hz */
424 ret = bma180_set_scale(data, 2452); /* 2 G */
431 dev_err(&data->client->dev, "failed to config the chip\n");
435 static int bma25x_chip_config(struct bma180_data *data)
437 int ret = bma180_chip_init(data);
441 ret = bma180_set_pmode(data, false);
444 ret = bma180_set_bw(data, 16); /* 16 Hz */
447 ret = bma180_set_scale(data, 38344); /* 2 G */
451 * This enables dataready interrupt on the INT1 pin
452 * FIXME: support using the INT2 pin
454 ret = bma180_set_bits(data, data->part_info->int_map_reg,
455 data->part_info->int_enable_dataready_int1_mask, 1);
462 dev_err(&data->client->dev, "failed to config the chip\n");
466 static void bma023_chip_disable(struct bma180_data *data)
468 if (bma180_set_sleep_state(data, true))
474 dev_err(&data->client->dev, "failed to disable the chip\n");
477 static void bma180_chip_disable(struct bma180_data *data)
479 if (bma180_set_new_data_intr_state(data, false))
481 if (bma180_set_ee_writing_state(data, false))
483 if (bma180_set_sleep_state(data, true))
489 dev_err(&data->client->dev, "failed to disable the chip\n");
492 static void bma25x_chip_disable(struct bma180_data *data)
494 if (bma180_set_new_data_intr_state(data, false))
496 if (bma180_set_sleep_state(data, true))
502 dev_err(&data->client->dev, "failed to disable the chip\n");
505 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
511 for (i = 0; i < n; i++) {
514 len += scnprintf(buf + len, PAGE_SIZE - len,
515 micros ? "0.%06d " : "%d ", vals[i]);
522 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
523 struct device_attribute *attr, char *buf)
525 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
527 return bma180_show_avail(buf, data->part_info->bw_table,
528 data->part_info->num_bw, false);
531 static ssize_t bma180_show_scale_avail(struct device *dev,
532 struct device_attribute *attr, char *buf)
534 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
536 return bma180_show_avail(buf, data->part_info->scale_table,
537 data->part_info->num_scales, true);
540 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
541 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
543 static IIO_DEVICE_ATTR(in_accel_scale_available,
544 S_IRUGO, bma180_show_scale_avail, NULL, 0);
546 static struct attribute *bma180_attributes[] = {
547 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
549 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
553 static const struct attribute_group bma180_attrs_group = {
554 .attrs = bma180_attributes,
557 static int bma180_read_raw(struct iio_dev *indio_dev,
558 struct iio_chan_spec const *chan, int *val, int *val2,
561 struct bma180_data *data = iio_priv(indio_dev);
565 case IIO_CHAN_INFO_RAW:
566 ret = iio_device_claim_direct_mode(indio_dev);
570 mutex_lock(&data->mutex);
571 ret = bma180_get_data_reg(data, chan->scan_index);
572 mutex_unlock(&data->mutex);
573 iio_device_release_direct_mode(indio_dev);
576 if (chan->scan_type.sign == 's') {
577 *val = sign_extend32(ret >> chan->scan_type.shift,
578 chan->scan_type.realbits - 1);
583 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
586 case IIO_CHAN_INFO_SCALE:
587 switch (chan->type) {
591 return IIO_VAL_INT_PLUS_MICRO;
598 case IIO_CHAN_INFO_OFFSET:
599 *val = data->part_info->temp_offset;
606 static int bma180_write_raw(struct iio_dev *indio_dev,
607 struct iio_chan_spec const *chan, int val, int val2, long mask)
609 struct bma180_data *data = iio_priv(indio_dev);
613 case IIO_CHAN_INFO_SCALE:
616 mutex_lock(&data->mutex);
617 ret = bma180_set_scale(data, val2);
618 mutex_unlock(&data->mutex);
620 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
623 mutex_lock(&data->mutex);
624 ret = bma180_set_bw(data, val);
625 mutex_unlock(&data->mutex);
632 static const struct iio_info bma180_info = {
633 .attrs = &bma180_attrs_group,
634 .read_raw = bma180_read_raw,
635 .write_raw = bma180_write_raw,
638 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
640 static int bma180_get_power_mode(struct iio_dev *indio_dev,
641 const struct iio_chan_spec *chan)
643 struct bma180_data *data = iio_priv(indio_dev);
648 static int bma180_set_power_mode(struct iio_dev *indio_dev,
649 const struct iio_chan_spec *chan, unsigned int mode)
651 struct bma180_data *data = iio_priv(indio_dev);
654 mutex_lock(&data->mutex);
655 ret = bma180_set_pmode(data, mode);
656 mutex_unlock(&data->mutex);
661 static const struct iio_mount_matrix *
662 bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
663 const struct iio_chan_spec *chan)
665 struct bma180_data *data = iio_priv(indio_dev);
667 return &data->orientation;
670 static const struct iio_enum bma180_power_mode_enum = {
671 .items = bma180_power_modes,
672 .num_items = ARRAY_SIZE(bma180_power_modes),
673 .get = bma180_get_power_mode,
674 .set = bma180_set_power_mode,
677 static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
678 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
682 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
683 IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
684 IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
685 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
689 #define BMA023_ACC_CHANNEL(_axis, _bits) { \
692 .channel2 = IIO_MOD_##_axis, \
693 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
694 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
695 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
696 .scan_index = AXIS_##_axis, \
701 .shift = 16 - _bits, \
703 .ext_info = bma023_ext_info, \
706 #define BMA150_TEMP_CHANNEL { \
708 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
709 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
710 .scan_index = TEMP, \
718 #define BMA180_ACC_CHANNEL(_axis, _bits) { \
721 .channel2 = IIO_MOD_##_axis, \
722 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
723 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
724 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
725 .scan_index = AXIS_##_axis, \
730 .shift = 16 - _bits, \
732 .ext_info = bma180_ext_info, \
735 #define BMA180_TEMP_CHANNEL { \
737 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
738 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
739 .scan_index = TEMP, \
747 static const struct iio_chan_spec bma023_channels[] = {
748 BMA023_ACC_CHANNEL(X, 10),
749 BMA023_ACC_CHANNEL(Y, 10),
750 BMA023_ACC_CHANNEL(Z, 10),
751 IIO_CHAN_SOFT_TIMESTAMP(4),
754 static const struct iio_chan_spec bma150_channels[] = {
755 BMA023_ACC_CHANNEL(X, 10),
756 BMA023_ACC_CHANNEL(Y, 10),
757 BMA023_ACC_CHANNEL(Z, 10),
759 IIO_CHAN_SOFT_TIMESTAMP(4),
762 static const struct iio_chan_spec bma180_channels[] = {
763 BMA180_ACC_CHANNEL(X, 14),
764 BMA180_ACC_CHANNEL(Y, 14),
765 BMA180_ACC_CHANNEL(Z, 14),
767 IIO_CHAN_SOFT_TIMESTAMP(4),
770 static const struct iio_chan_spec bma250_channels[] = {
771 BMA180_ACC_CHANNEL(X, 10),
772 BMA180_ACC_CHANNEL(Y, 10),
773 BMA180_ACC_CHANNEL(Z, 10),
775 IIO_CHAN_SOFT_TIMESTAMP(4),
778 static const struct iio_chan_spec bma254_channels[] = {
779 BMA180_ACC_CHANNEL(X, 12),
780 BMA180_ACC_CHANNEL(Y, 12),
781 BMA180_ACC_CHANNEL(Z, 12),
783 IIO_CHAN_SOFT_TIMESTAMP(4),
786 static const struct bma180_part_info bma180_part_info[] = {
788 .chip_id = BMA023_ID_REG_VAL,
789 .channels = bma023_channels,
790 .num_channels = ARRAY_SIZE(bma023_channels),
791 .scale_table = bma023_scale_table,
792 .num_scales = ARRAY_SIZE(bma023_scale_table),
793 .bw_table = bma023_bw_table,
794 .num_bw = ARRAY_SIZE(bma023_bw_table),
795 /* No temperature channel */
797 .int_reset_reg = BMA023_CTRL_REG0,
798 .int_reset_mask = BMA023_INT_RESET_MASK,
799 .sleep_reg = BMA023_CTRL_REG0,
800 .sleep_mask = BMA023_SLEEP,
801 .bw_reg = BMA023_CTRL_REG2,
802 .bw_mask = BMA023_BW_MASK,
803 .scale_reg = BMA023_CTRL_REG2,
804 .scale_mask = BMA023_RANGE_MASK,
805 /* No power mode on bma023 */
809 .int_enable_reg = BMA023_CTRL_REG3,
810 .int_enable_mask = BMA023_NEW_DATA_INT,
811 .softreset_reg = BMA023_CTRL_REG0,
812 .softreset_val = BMA023_RESET_VAL,
813 .chip_config = bma023_chip_config,
814 .chip_disable = bma023_chip_disable,
817 .chip_id = BMA023_ID_REG_VAL,
818 .channels = bma150_channels,
819 .num_channels = ARRAY_SIZE(bma150_channels),
820 .scale_table = bma023_scale_table,
821 .num_scales = ARRAY_SIZE(bma023_scale_table),
822 .bw_table = bma023_bw_table,
823 .num_bw = ARRAY_SIZE(bma023_bw_table),
824 .temp_offset = -60, /* 0 LSB @ -30 degree C */
825 .int_reset_reg = BMA023_CTRL_REG0,
826 .int_reset_mask = BMA023_INT_RESET_MASK,
827 .sleep_reg = BMA023_CTRL_REG0,
828 .sleep_mask = BMA023_SLEEP,
829 .bw_reg = BMA023_CTRL_REG2,
830 .bw_mask = BMA023_BW_MASK,
831 .scale_reg = BMA023_CTRL_REG2,
832 .scale_mask = BMA023_RANGE_MASK,
833 /* No power mode on bma150 */
837 .int_enable_reg = BMA023_CTRL_REG3,
838 .int_enable_mask = BMA023_NEW_DATA_INT,
839 .softreset_reg = BMA023_CTRL_REG0,
840 .softreset_val = BMA023_RESET_VAL,
841 .chip_config = bma023_chip_config,
842 .chip_disable = bma023_chip_disable,
845 .chip_id = BMA180_ID_REG_VAL,
846 .channels = bma180_channels,
847 .num_channels = ARRAY_SIZE(bma180_channels),
848 .scale_table = bma180_scale_table,
849 .num_scales = ARRAY_SIZE(bma180_scale_table),
850 .bw_table = bma180_bw_table,
851 .num_bw = ARRAY_SIZE(bma180_bw_table),
852 .temp_offset = 48, /* 0 LSB @ 24 degree C */
853 .int_reset_reg = BMA180_CTRL_REG0,
854 .int_reset_mask = BMA180_RESET_INT,
855 .sleep_reg = BMA180_CTRL_REG0,
856 .sleep_mask = BMA180_SLEEP,
857 .bw_reg = BMA180_BW_TCS,
858 .bw_mask = BMA180_BW,
859 .scale_reg = BMA180_OFFSET_LSB1,
860 .scale_mask = BMA180_RANGE,
861 .power_reg = BMA180_TCO_Z,
862 .power_mask = BMA180_MODE_CONFIG,
863 .lowpower_val = BMA180_LOW_POWER,
864 .int_enable_reg = BMA180_CTRL_REG3,
865 .int_enable_mask = BMA180_NEW_DATA_INT,
866 .softreset_reg = BMA180_RESET,
867 .softreset_val = BMA180_RESET_VAL,
868 .chip_config = bma180_chip_config,
869 .chip_disable = bma180_chip_disable,
872 .chip_id = BMA250_ID_REG_VAL,
873 .channels = bma250_channels,
874 .num_channels = ARRAY_SIZE(bma250_channels),
875 .scale_table = bma25x_scale_table,
876 .num_scales = ARRAY_SIZE(bma25x_scale_table),
877 .bw_table = bma25x_bw_table,
878 .num_bw = ARRAY_SIZE(bma25x_bw_table),
879 .temp_offset = 48, /* 0 LSB @ 24 degree C */
880 .int_reset_reg = BMA250_INT_RESET_REG,
881 .int_reset_mask = BMA250_INT_RESET_MASK,
882 .sleep_reg = BMA250_POWER_REG,
883 .sleep_mask = BMA250_SUSPEND_MASK,
884 .bw_reg = BMA250_BW_REG,
885 .bw_mask = BMA250_BW_MASK,
886 .bw_offset = BMA250_BW_OFFSET,
887 .scale_reg = BMA250_RANGE_REG,
888 .scale_mask = BMA250_RANGE_MASK,
889 .power_reg = BMA250_POWER_REG,
890 .power_mask = BMA250_LOWPOWER_MASK,
892 .int_enable_reg = BMA250_INT_ENABLE_REG,
893 .int_enable_mask = BMA250_DATA_INTEN_MASK,
894 .int_map_reg = BMA250_INT_MAP_REG,
895 .int_enable_dataready_int1_mask = BMA250_INT1_DATA_MASK,
896 .softreset_reg = BMA250_RESET_REG,
897 .softreset_val = BMA180_RESET_VAL,
898 .chip_config = bma25x_chip_config,
899 .chip_disable = bma25x_chip_disable,
902 .chip_id = BMA254_ID_REG_VAL,
903 .channels = bma254_channels,
904 .num_channels = ARRAY_SIZE(bma254_channels),
905 .scale_table = bma25x_scale_table,
906 .num_scales = ARRAY_SIZE(bma25x_scale_table),
907 .bw_table = bma25x_bw_table,
908 .num_bw = ARRAY_SIZE(bma25x_bw_table),
909 .temp_offset = 46, /* 0 LSB @ 23 degree C */
910 .int_reset_reg = BMA254_INT_RESET_REG,
911 .int_reset_mask = BMA254_INT_RESET_MASK,
912 .sleep_reg = BMA254_POWER_REG,
913 .sleep_mask = BMA254_SUSPEND_MASK,
914 .bw_reg = BMA254_BW_REG,
915 .bw_mask = BMA254_BW_MASK,
916 .bw_offset = BMA254_BW_OFFSET,
917 .scale_reg = BMA254_RANGE_REG,
918 .scale_mask = BMA254_RANGE_MASK,
919 .power_reg = BMA254_POWER_REG,
920 .power_mask = BMA254_LOWPOWER_MASK,
922 .int_enable_reg = BMA254_INT_ENABLE_REG,
923 .int_enable_mask = BMA254_DATA_INTEN_MASK,
924 .int_map_reg = BMA254_INT_MAP_REG,
925 .int_enable_dataready_int1_mask = BMA254_INT1_DATA_MASK,
926 .softreset_reg = BMA254_RESET_REG,
927 .softreset_val = BMA180_RESET_VAL,
928 .chip_config = bma25x_chip_config,
929 .chip_disable = bma25x_chip_disable,
933 static irqreturn_t bma180_trigger_handler(int irq, void *p)
935 struct iio_poll_func *pf = p;
936 struct iio_dev *indio_dev = pf->indio_dev;
937 struct bma180_data *data = iio_priv(indio_dev);
938 s64 time_ns = iio_get_time_ns(indio_dev);
941 mutex_lock(&data->mutex);
943 for_each_set_bit(bit, indio_dev->active_scan_mask,
944 indio_dev->masklength) {
945 ret = bma180_get_data_reg(data, bit);
947 mutex_unlock(&data->mutex);
950 data->scan.chan[i++] = ret;
953 mutex_unlock(&data->mutex);
955 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
957 iio_trigger_notify_done(indio_dev->trig);
962 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
965 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
966 struct bma180_data *data = iio_priv(indio_dev);
968 return bma180_set_new_data_intr_state(data, state);
971 static int bma180_trig_try_reen(struct iio_trigger *trig)
973 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
974 struct bma180_data *data = iio_priv(indio_dev);
976 return bma180_reset_intr(data);
979 static const struct iio_trigger_ops bma180_trigger_ops = {
980 .set_trigger_state = bma180_data_rdy_trigger_set_state,
981 .try_reenable = bma180_trig_try_reen,
984 static int bma180_probe(struct i2c_client *client,
985 const struct i2c_device_id *id)
987 struct device *dev = &client->dev;
988 struct bma180_data *data;
989 struct iio_dev *indio_dev;
993 indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
997 data = iio_priv(indio_dev);
998 i2c_set_clientdata(client, indio_dev);
999 data->client = client;
1000 if (client->dev.of_node)
1001 chip = (enum chip_ids)of_device_get_match_data(dev);
1003 chip = id->driver_data;
1004 data->part_info = &bma180_part_info[chip];
1006 ret = iio_read_mount_matrix(dev, "mount-matrix",
1007 &data->orientation);
1011 data->vdd_supply = devm_regulator_get(dev, "vdd");
1012 if (IS_ERR(data->vdd_supply))
1013 return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
1014 "Failed to get vdd regulator\n");
1016 data->vddio_supply = devm_regulator_get(dev, "vddio");
1017 if (IS_ERR(data->vddio_supply))
1018 return dev_err_probe(dev, PTR_ERR(data->vddio_supply),
1019 "Failed to get vddio regulator\n");
1021 /* Typical voltage 2.4V these are min and max */
1022 ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
1025 ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
1028 ret = regulator_enable(data->vdd_supply);
1030 dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
1033 ret = regulator_enable(data->vddio_supply);
1035 dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
1036 goto err_disable_vdd;
1038 /* Wait to make sure we started up properly (3 ms at least) */
1039 usleep_range(3000, 5000);
1041 ret = data->part_info->chip_config(data);
1043 goto err_chip_disable;
1045 mutex_init(&data->mutex);
1046 indio_dev->channels = data->part_info->channels;
1047 indio_dev->num_channels = data->part_info->num_channels;
1048 indio_dev->name = id->name;
1049 indio_dev->modes = INDIO_DIRECT_MODE;
1050 indio_dev->info = &bma180_info;
1052 if (client->irq > 0) {
1053 data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
1057 goto err_chip_disable;
1060 ret = devm_request_irq(dev, client->irq,
1061 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
1062 "bma180_event", data->trig);
1064 dev_err(dev, "unable to request IRQ\n");
1065 goto err_trigger_free;
1068 data->trig->dev.parent = dev;
1069 data->trig->ops = &bma180_trigger_ops;
1070 iio_trigger_set_drvdata(data->trig, indio_dev);
1072 ret = iio_trigger_register(data->trig);
1074 goto err_trigger_free;
1076 indio_dev->trig = iio_trigger_get(data->trig);
1079 ret = iio_triggered_buffer_setup(indio_dev, NULL,
1080 bma180_trigger_handler, NULL);
1082 dev_err(dev, "unable to setup iio triggered buffer\n");
1083 goto err_trigger_unregister;
1086 ret = iio_device_register(indio_dev);
1088 dev_err(dev, "unable to register iio device\n");
1089 goto err_buffer_cleanup;
1095 iio_triggered_buffer_cleanup(indio_dev);
1096 err_trigger_unregister:
1098 iio_trigger_unregister(data->trig);
1100 iio_trigger_free(data->trig);
1102 data->part_info->chip_disable(data);
1103 regulator_disable(data->vddio_supply);
1105 regulator_disable(data->vdd_supply);
1110 static int bma180_remove(struct i2c_client *client)
1112 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1113 struct bma180_data *data = iio_priv(indio_dev);
1115 iio_device_unregister(indio_dev);
1116 iio_triggered_buffer_cleanup(indio_dev);
1118 iio_trigger_unregister(data->trig);
1119 iio_trigger_free(data->trig);
1122 mutex_lock(&data->mutex);
1123 data->part_info->chip_disable(data);
1124 mutex_unlock(&data->mutex);
1125 regulator_disable(data->vddio_supply);
1126 regulator_disable(data->vdd_supply);
1131 #ifdef CONFIG_PM_SLEEP
1132 static int bma180_suspend(struct device *dev)
1134 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1135 struct bma180_data *data = iio_priv(indio_dev);
1138 mutex_lock(&data->mutex);
1139 ret = bma180_set_sleep_state(data, true);
1140 mutex_unlock(&data->mutex);
1145 static int bma180_resume(struct device *dev)
1147 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1148 struct bma180_data *data = iio_priv(indio_dev);
1151 mutex_lock(&data->mutex);
1152 ret = bma180_set_sleep_state(data, false);
1153 mutex_unlock(&data->mutex);
1158 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
1159 #define BMA180_PM_OPS (&bma180_pm_ops)
1161 #define BMA180_PM_OPS NULL
1164 static const struct i2c_device_id bma180_ids[] = {
1165 { "bma023", BMA023 },
1166 { "bma150", BMA150 },
1167 { "bma180", BMA180 },
1168 { "bma250", BMA250 },
1169 { "bma254", BMA254 },
1170 { "smb380", BMA150 },
1174 MODULE_DEVICE_TABLE(i2c, bma180_ids);
1176 static const struct of_device_id bma180_of_match[] = {
1178 .compatible = "bosch,bma023",
1179 .data = (void *)BMA023
1182 .compatible = "bosch,bma150",
1183 .data = (void *)BMA150
1186 .compatible = "bosch,bma180",
1187 .data = (void *)BMA180
1190 .compatible = "bosch,bma250",
1191 .data = (void *)BMA250
1194 .compatible = "bosch,bma254",
1195 .data = (void *)BMA254
1198 .compatible = "bosch,smb380",
1199 .data = (void *)BMA150
1203 MODULE_DEVICE_TABLE(of, bma180_of_match);
1205 static struct i2c_driver bma180_driver = {
1208 .pm = BMA180_PM_OPS,
1209 .of_match_table = bma180_of_match,
1211 .probe = bma180_probe,
1212 .remove = bma180_remove,
1213 .id_table = bma180_ids,
1216 module_i2c_driver(bma180_driver);
1218 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
1219 MODULE_AUTHOR("Texas Instruments, Inc.");
1220 MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA25x triaxial acceleration sensor");
1221 MODULE_LICENSE("GPL");