1 // SPDX-License-Identifier: GPL-2.0-only
3 * Bosch BMC150 three-axis magnetic field sensor driver
5 * Copyright (c) 2015, Intel Corporation.
7 * This code is based on bmm050_api.c authored by contact@bosch.sensortec.com:
9 * (C) Copyright 2011~2014 Bosch Sensortec GmbH All Rights Reserved
12 #include <linux/module.h>
13 #include <linux/i2c.h>
14 #include <linux/interrupt.h>
15 #include <linux/delay.h>
16 #include <linux/slab.h>
17 #include <linux/acpi.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/iio/iio.h>
21 #include <linux/iio/sysfs.h>
22 #include <linux/iio/buffer.h>
23 #include <linux/iio/events.h>
24 #include <linux/iio/trigger.h>
25 #include <linux/iio/trigger_consumer.h>
26 #include <linux/iio/triggered_buffer.h>
27 #include <linux/regmap.h>
29 #include "bmc150_magn.h"
31 #define BMC150_MAGN_DRV_NAME "bmc150_magn"
32 #define BMC150_MAGN_IRQ_NAME "bmc150_magn_event"
34 #define BMC150_MAGN_REG_CHIP_ID 0x40
35 #define BMC150_MAGN_CHIP_ID_VAL 0x32
37 #define BMC150_MAGN_REG_X_L 0x42
38 #define BMC150_MAGN_REG_X_M 0x43
39 #define BMC150_MAGN_REG_Y_L 0x44
40 #define BMC150_MAGN_REG_Y_M 0x45
41 #define BMC150_MAGN_SHIFT_XY_L 3
42 #define BMC150_MAGN_REG_Z_L 0x46
43 #define BMC150_MAGN_REG_Z_M 0x47
44 #define BMC150_MAGN_SHIFT_Z_L 1
45 #define BMC150_MAGN_REG_RHALL_L 0x48
46 #define BMC150_MAGN_REG_RHALL_M 0x49
47 #define BMC150_MAGN_SHIFT_RHALL_L 2
49 #define BMC150_MAGN_REG_INT_STATUS 0x4A
51 #define BMC150_MAGN_REG_POWER 0x4B
52 #define BMC150_MAGN_MASK_POWER_CTL BIT(0)
54 #define BMC150_MAGN_REG_OPMODE_ODR 0x4C
55 #define BMC150_MAGN_MASK_OPMODE GENMASK(2, 1)
56 #define BMC150_MAGN_SHIFT_OPMODE 1
57 #define BMC150_MAGN_MODE_NORMAL 0x00
58 #define BMC150_MAGN_MODE_FORCED 0x01
59 #define BMC150_MAGN_MODE_SLEEP 0x03
60 #define BMC150_MAGN_MASK_ODR GENMASK(5, 3)
61 #define BMC150_MAGN_SHIFT_ODR 3
63 #define BMC150_MAGN_REG_INT 0x4D
65 #define BMC150_MAGN_REG_INT_DRDY 0x4E
66 #define BMC150_MAGN_MASK_DRDY_EN BIT(7)
67 #define BMC150_MAGN_SHIFT_DRDY_EN 7
68 #define BMC150_MAGN_MASK_DRDY_INT3 BIT(6)
69 #define BMC150_MAGN_MASK_DRDY_Z_EN BIT(5)
70 #define BMC150_MAGN_MASK_DRDY_Y_EN BIT(4)
71 #define BMC150_MAGN_MASK_DRDY_X_EN BIT(3)
72 #define BMC150_MAGN_MASK_DRDY_DR_POLARITY BIT(2)
73 #define BMC150_MAGN_MASK_DRDY_LATCHING BIT(1)
74 #define BMC150_MAGN_MASK_DRDY_INT3_POLARITY BIT(0)
76 #define BMC150_MAGN_REG_LOW_THRESH 0x4F
77 #define BMC150_MAGN_REG_HIGH_THRESH 0x50
78 #define BMC150_MAGN_REG_REP_XY 0x51
79 #define BMC150_MAGN_REG_REP_Z 0x52
80 #define BMC150_MAGN_REG_REP_DATAMASK GENMASK(7, 0)
82 #define BMC150_MAGN_REG_TRIM_START 0x5D
83 #define BMC150_MAGN_REG_TRIM_END 0x71
85 #define BMC150_MAGN_XY_OVERFLOW_VAL -4096
86 #define BMC150_MAGN_Z_OVERFLOW_VAL -16384
88 /* Time from SUSPEND to SLEEP */
89 #define BMC150_MAGN_START_UP_TIME_MS 3
91 #define BMC150_MAGN_AUTO_SUSPEND_DELAY_MS 2000
93 #define BMC150_MAGN_REGVAL_TO_REPXY(regval) (((regval) * 2) + 1)
94 #define BMC150_MAGN_REGVAL_TO_REPZ(regval) ((regval) + 1)
95 #define BMC150_MAGN_REPXY_TO_REGVAL(rep) (((rep) - 1) / 2)
96 #define BMC150_MAGN_REPZ_TO_REGVAL(rep) ((rep) - 1)
98 enum bmc150_magn_axis {
103 AXIS_XYZ_MAX = RHALL,
107 enum bmc150_magn_power_modes {
108 BMC150_MAGN_POWER_MODE_SUSPEND,
109 BMC150_MAGN_POWER_MODE_SLEEP,
110 BMC150_MAGN_POWER_MODE_NORMAL,
113 struct bmc150_magn_trim_regs {
130 struct bmc150_magn_data {
133 * 1. Protect this structure.
134 * 2. Serialize sequences that power on/off the device and access HW.
137 struct regmap *regmap;
138 struct iio_mount_matrix orientation;
139 /* 4 x 32 bits for x, y z, 4 bytes align, 64 bits timestamp */
141 struct iio_trigger *dready_trig;
142 bool dready_trigger_on;
147 static const struct {
150 } bmc150_magn_samp_freq_table[] = { {2, 0x01},
159 enum bmc150_magn_presets {
162 ENHANCED_REGULAR_PRESET,
166 static const struct bmc150_magn_preset {
170 } bmc150_magn_presets_table[] = {
171 [LOW_POWER_PRESET] = {3, 3, 10},
172 [REGULAR_PRESET] = {9, 15, 10},
173 [ENHANCED_REGULAR_PRESET] = {15, 27, 10},
174 [HIGH_ACCURACY_PRESET] = {47, 83, 20},
177 #define BMC150_MAGN_DEFAULT_PRESET REGULAR_PRESET
179 static bool bmc150_magn_is_writeable_reg(struct device *dev, unsigned int reg)
182 case BMC150_MAGN_REG_POWER:
183 case BMC150_MAGN_REG_OPMODE_ODR:
184 case BMC150_MAGN_REG_INT:
185 case BMC150_MAGN_REG_INT_DRDY:
186 case BMC150_MAGN_REG_LOW_THRESH:
187 case BMC150_MAGN_REG_HIGH_THRESH:
188 case BMC150_MAGN_REG_REP_XY:
189 case BMC150_MAGN_REG_REP_Z:
196 static bool bmc150_magn_is_volatile_reg(struct device *dev, unsigned int reg)
199 case BMC150_MAGN_REG_X_L:
200 case BMC150_MAGN_REG_X_M:
201 case BMC150_MAGN_REG_Y_L:
202 case BMC150_MAGN_REG_Y_M:
203 case BMC150_MAGN_REG_Z_L:
204 case BMC150_MAGN_REG_Z_M:
205 case BMC150_MAGN_REG_RHALL_L:
206 case BMC150_MAGN_REG_RHALL_M:
207 case BMC150_MAGN_REG_INT_STATUS:
214 const struct regmap_config bmc150_magn_regmap_config = {
218 .max_register = BMC150_MAGN_REG_TRIM_END,
219 .cache_type = REGCACHE_RBTREE,
221 .writeable_reg = bmc150_magn_is_writeable_reg,
222 .volatile_reg = bmc150_magn_is_volatile_reg,
224 EXPORT_SYMBOL(bmc150_magn_regmap_config);
226 static int bmc150_magn_set_power_mode(struct bmc150_magn_data *data,
227 enum bmc150_magn_power_modes mode,
233 case BMC150_MAGN_POWER_MODE_SUSPEND:
234 ret = regmap_update_bits(data->regmap, BMC150_MAGN_REG_POWER,
235 BMC150_MAGN_MASK_POWER_CTL, !state);
238 usleep_range(BMC150_MAGN_START_UP_TIME_MS * 1000, 20000);
240 case BMC150_MAGN_POWER_MODE_SLEEP:
241 return regmap_update_bits(data->regmap,
242 BMC150_MAGN_REG_OPMODE_ODR,
243 BMC150_MAGN_MASK_OPMODE,
244 BMC150_MAGN_MODE_SLEEP <<
245 BMC150_MAGN_SHIFT_OPMODE);
246 case BMC150_MAGN_POWER_MODE_NORMAL:
247 return regmap_update_bits(data->regmap,
248 BMC150_MAGN_REG_OPMODE_ODR,
249 BMC150_MAGN_MASK_OPMODE,
250 BMC150_MAGN_MODE_NORMAL <<
251 BMC150_MAGN_SHIFT_OPMODE);
257 static int bmc150_magn_set_power_state(struct bmc150_magn_data *data, bool on)
263 ret = pm_runtime_get_sync(data->dev);
265 pm_runtime_mark_last_busy(data->dev);
266 ret = pm_runtime_put_autosuspend(data->dev);
271 "failed to change power state to %d\n", on);
273 pm_runtime_put_noidle(data->dev);
282 static int bmc150_magn_get_odr(struct bmc150_magn_data *data, int *val)
287 ret = regmap_read(data->regmap, BMC150_MAGN_REG_OPMODE_ODR, ®_val);
290 odr_val = (reg_val & BMC150_MAGN_MASK_ODR) >> BMC150_MAGN_SHIFT_ODR;
292 for (i = 0; i < ARRAY_SIZE(bmc150_magn_samp_freq_table); i++)
293 if (bmc150_magn_samp_freq_table[i].reg_val == odr_val) {
294 *val = bmc150_magn_samp_freq_table[i].freq;
301 static int bmc150_magn_set_odr(struct bmc150_magn_data *data, int val)
306 for (i = 0; i < ARRAY_SIZE(bmc150_magn_samp_freq_table); i++) {
307 if (bmc150_magn_samp_freq_table[i].freq == val) {
308 ret = regmap_update_bits(data->regmap,
309 BMC150_MAGN_REG_OPMODE_ODR,
310 BMC150_MAGN_MASK_ODR,
311 bmc150_magn_samp_freq_table[i].
313 BMC150_MAGN_SHIFT_ODR);
323 static int bmc150_magn_set_max_odr(struct bmc150_magn_data *data, int rep_xy,
326 int ret, reg_val, max_odr;
329 ret = regmap_read(data->regmap, BMC150_MAGN_REG_REP_XY,
333 rep_xy = BMC150_MAGN_REGVAL_TO_REPXY(reg_val);
336 ret = regmap_read(data->regmap, BMC150_MAGN_REG_REP_Z,
340 rep_z = BMC150_MAGN_REGVAL_TO_REPZ(reg_val);
343 ret = bmc150_magn_get_odr(data, &odr);
347 /* the maximum selectable read-out frequency from datasheet */
348 max_odr = 1000000 / (145 * rep_xy + 500 * rep_z + 980);
351 "Can't set oversampling with sampling freq %d\n",
355 data->max_odr = max_odr;
360 static s32 bmc150_magn_compensate_x(struct bmc150_magn_trim_regs *tregs, s16 x,
364 u16 xyz1 = le16_to_cpu(tregs->xyz1);
366 if (x == BMC150_MAGN_XY_OVERFLOW_VAL)
372 val = ((s16)(((u16)((((s32)xyz1) << 14) / rhall)) - ((u16)0x4000)));
373 val = ((s16)((((s32)x) * ((((((((s32)tregs->xy2) * ((((s32)val) *
374 ((s32)val)) >> 7)) + (((s32)val) *
375 ((s32)(((s16)tregs->xy1) << 7)))) >> 9) + ((s32)0x100000)) *
376 ((s32)(((s16)tregs->x2) + ((s16)0xA0)))) >> 12)) >> 13)) +
377 (((s16)tregs->x1) << 3);
382 static s32 bmc150_magn_compensate_y(struct bmc150_magn_trim_regs *tregs, s16 y,
386 u16 xyz1 = le16_to_cpu(tregs->xyz1);
388 if (y == BMC150_MAGN_XY_OVERFLOW_VAL)
394 val = ((s16)(((u16)((((s32)xyz1) << 14) / rhall)) - ((u16)0x4000)));
395 val = ((s16)((((s32)y) * ((((((((s32)tregs->xy2) * ((((s32)val) *
396 ((s32)val)) >> 7)) + (((s32)val) *
397 ((s32)(((s16)tregs->xy1) << 7)))) >> 9) + ((s32)0x100000)) *
398 ((s32)(((s16)tregs->y2) + ((s16)0xA0)))) >> 12)) >> 13)) +
399 (((s16)tregs->y1) << 3);
404 static s32 bmc150_magn_compensate_z(struct bmc150_magn_trim_regs *tregs, s16 z,
408 u16 xyz1 = le16_to_cpu(tregs->xyz1);
409 u16 z1 = le16_to_cpu(tregs->z1);
410 s16 z2 = le16_to_cpu(tregs->z2);
411 s16 z3 = le16_to_cpu(tregs->z3);
412 s16 z4 = le16_to_cpu(tregs->z4);
414 if (z == BMC150_MAGN_Z_OVERFLOW_VAL)
417 val = (((((s32)(z - z4)) << 15) - ((((s32)z3) * ((s32)(((s16)rhall) -
418 ((s16)xyz1)))) >> 2)) / (z2 + ((s16)(((((s32)z1) *
419 ((((s16)rhall) << 1))) + (1 << 15)) >> 16))));
424 static int bmc150_magn_read_xyz(struct bmc150_magn_data *data, s32 *buffer)
427 __le16 values[AXIS_XYZR_MAX];
428 s16 raw_x, raw_y, raw_z;
430 struct bmc150_magn_trim_regs tregs;
432 ret = regmap_bulk_read(data->regmap, BMC150_MAGN_REG_X_L,
433 values, sizeof(values));
437 raw_x = (s16)le16_to_cpu(values[AXIS_X]) >> BMC150_MAGN_SHIFT_XY_L;
438 raw_y = (s16)le16_to_cpu(values[AXIS_Y]) >> BMC150_MAGN_SHIFT_XY_L;
439 raw_z = (s16)le16_to_cpu(values[AXIS_Z]) >> BMC150_MAGN_SHIFT_Z_L;
440 rhall = le16_to_cpu(values[RHALL]) >> BMC150_MAGN_SHIFT_RHALL_L;
442 ret = regmap_bulk_read(data->regmap, BMC150_MAGN_REG_TRIM_START,
443 &tregs, sizeof(tregs));
447 buffer[AXIS_X] = bmc150_magn_compensate_x(&tregs, raw_x, rhall);
448 buffer[AXIS_Y] = bmc150_magn_compensate_y(&tregs, raw_y, rhall);
449 buffer[AXIS_Z] = bmc150_magn_compensate_z(&tregs, raw_z, rhall);
454 static int bmc150_magn_read_raw(struct iio_dev *indio_dev,
455 struct iio_chan_spec const *chan,
456 int *val, int *val2, long mask)
458 struct bmc150_magn_data *data = iio_priv(indio_dev);
460 s32 values[AXIS_XYZ_MAX];
463 case IIO_CHAN_INFO_RAW:
464 if (iio_buffer_enabled(indio_dev))
466 mutex_lock(&data->mutex);
468 ret = bmc150_magn_set_power_state(data, true);
470 mutex_unlock(&data->mutex);
474 ret = bmc150_magn_read_xyz(data, values);
476 bmc150_magn_set_power_state(data, false);
477 mutex_unlock(&data->mutex);
480 *val = values[chan->scan_index];
482 ret = bmc150_magn_set_power_state(data, false);
484 mutex_unlock(&data->mutex);
488 mutex_unlock(&data->mutex);
490 case IIO_CHAN_INFO_SCALE:
492 * The API/driver performs an off-chip temperature
493 * compensation and outputs x/y/z magnetic field data in
494 * 16 LSB/uT to the upper application layer.
498 return IIO_VAL_INT_PLUS_MICRO;
499 case IIO_CHAN_INFO_SAMP_FREQ:
500 ret = bmc150_magn_get_odr(data, val);
504 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
505 switch (chan->channel2) {
508 ret = regmap_read(data->regmap, BMC150_MAGN_REG_REP_XY,
512 *val = BMC150_MAGN_REGVAL_TO_REPXY(tmp);
515 ret = regmap_read(data->regmap, BMC150_MAGN_REG_REP_Z,
519 *val = BMC150_MAGN_REGVAL_TO_REPZ(tmp);
529 static int bmc150_magn_write_raw(struct iio_dev *indio_dev,
530 struct iio_chan_spec const *chan,
531 int val, int val2, long mask)
533 struct bmc150_magn_data *data = iio_priv(indio_dev);
537 case IIO_CHAN_INFO_SAMP_FREQ:
538 if (val > data->max_odr)
540 mutex_lock(&data->mutex);
541 ret = bmc150_magn_set_odr(data, val);
542 mutex_unlock(&data->mutex);
544 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
545 switch (chan->channel2) {
548 if (val < 1 || val > 511)
550 mutex_lock(&data->mutex);
551 ret = bmc150_magn_set_max_odr(data, val, 0, 0);
553 mutex_unlock(&data->mutex);
556 ret = regmap_update_bits(data->regmap,
557 BMC150_MAGN_REG_REP_XY,
558 BMC150_MAGN_REG_REP_DATAMASK,
559 BMC150_MAGN_REPXY_TO_REGVAL
561 mutex_unlock(&data->mutex);
564 if (val < 1 || val > 256)
566 mutex_lock(&data->mutex);
567 ret = bmc150_magn_set_max_odr(data, 0, val, 0);
569 mutex_unlock(&data->mutex);
572 ret = regmap_update_bits(data->regmap,
573 BMC150_MAGN_REG_REP_Z,
574 BMC150_MAGN_REG_REP_DATAMASK,
575 BMC150_MAGN_REPZ_TO_REGVAL
577 mutex_unlock(&data->mutex);
587 static ssize_t bmc150_magn_show_samp_freq_avail(struct device *dev,
588 struct device_attribute *attr,
591 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
592 struct bmc150_magn_data *data = iio_priv(indio_dev);
596 for (i = 0; i < ARRAY_SIZE(bmc150_magn_samp_freq_table); i++) {
597 if (bmc150_magn_samp_freq_table[i].freq > data->max_odr)
599 len += scnprintf(buf + len, PAGE_SIZE - len, "%d ",
600 bmc150_magn_samp_freq_table[i].freq);
602 /* replace last space with a newline */
608 static const struct iio_mount_matrix *
609 bmc150_magn_get_mount_matrix(const struct iio_dev *indio_dev,
610 const struct iio_chan_spec *chan)
612 struct bmc150_magn_data *data = iio_priv(indio_dev);
614 return &data->orientation;
617 static const struct iio_chan_spec_ext_info bmc150_magn_ext_info[] = {
618 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bmc150_magn_get_mount_matrix),
622 static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(bmc150_magn_show_samp_freq_avail);
624 static struct attribute *bmc150_magn_attributes[] = {
625 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
629 static const struct attribute_group bmc150_magn_attrs_group = {
630 .attrs = bmc150_magn_attributes,
633 #define BMC150_MAGN_CHANNEL(_axis) { \
636 .channel2 = IIO_MOD_##_axis, \
637 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
638 BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
639 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
640 BIT(IIO_CHAN_INFO_SCALE), \
641 .scan_index = AXIS_##_axis, \
646 .endianness = IIO_LE \
648 .ext_info = bmc150_magn_ext_info, \
651 static const struct iio_chan_spec bmc150_magn_channels[] = {
652 BMC150_MAGN_CHANNEL(X),
653 BMC150_MAGN_CHANNEL(Y),
654 BMC150_MAGN_CHANNEL(Z),
655 IIO_CHAN_SOFT_TIMESTAMP(3),
658 static const struct iio_info bmc150_magn_info = {
659 .attrs = &bmc150_magn_attrs_group,
660 .read_raw = bmc150_magn_read_raw,
661 .write_raw = bmc150_magn_write_raw,
664 static const unsigned long bmc150_magn_scan_masks[] = {
665 BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
668 static irqreturn_t bmc150_magn_trigger_handler(int irq, void *p)
670 struct iio_poll_func *pf = p;
671 struct iio_dev *indio_dev = pf->indio_dev;
672 struct bmc150_magn_data *data = iio_priv(indio_dev);
675 mutex_lock(&data->mutex);
676 ret = bmc150_magn_read_xyz(data, data->buffer);
680 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
684 mutex_unlock(&data->mutex);
685 iio_trigger_notify_done(indio_dev->trig);
690 static int bmc150_magn_init(struct bmc150_magn_data *data)
693 struct bmc150_magn_preset preset;
695 ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND,
699 "Failed to bring up device from suspend mode\n");
703 ret = regmap_read(data->regmap, BMC150_MAGN_REG_CHIP_ID, &chip_id);
705 dev_err(data->dev, "Failed reading chip id\n");
708 if (chip_id != BMC150_MAGN_CHIP_ID_VAL) {
709 dev_err(data->dev, "Invalid chip id 0x%x\n", chip_id);
713 dev_dbg(data->dev, "Chip id %x\n", chip_id);
715 preset = bmc150_magn_presets_table[BMC150_MAGN_DEFAULT_PRESET];
716 ret = bmc150_magn_set_odr(data, preset.odr);
718 dev_err(data->dev, "Failed to set ODR to %d\n",
723 ret = regmap_write(data->regmap, BMC150_MAGN_REG_REP_XY,
724 BMC150_MAGN_REPXY_TO_REGVAL(preset.rep_xy));
726 dev_err(data->dev, "Failed to set REP XY to %d\n",
731 ret = regmap_write(data->regmap, BMC150_MAGN_REG_REP_Z,
732 BMC150_MAGN_REPZ_TO_REGVAL(preset.rep_z));
734 dev_err(data->dev, "Failed to set REP Z to %d\n",
739 ret = bmc150_magn_set_max_odr(data, preset.rep_xy, preset.rep_z,
744 ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_NORMAL,
747 dev_err(data->dev, "Failed to power on device\n");
754 bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND, true);
758 static int bmc150_magn_reset_intr(struct bmc150_magn_data *data)
763 * Data Ready (DRDY) is always cleared after
764 * readout of data registers ends.
766 return regmap_read(data->regmap, BMC150_MAGN_REG_X_L, &tmp);
769 static int bmc150_magn_trig_try_reen(struct iio_trigger *trig)
771 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
772 struct bmc150_magn_data *data = iio_priv(indio_dev);
775 if (!data->dready_trigger_on)
778 mutex_lock(&data->mutex);
779 ret = bmc150_magn_reset_intr(data);
780 mutex_unlock(&data->mutex);
785 static int bmc150_magn_data_rdy_trigger_set_state(struct iio_trigger *trig,
788 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
789 struct bmc150_magn_data *data = iio_priv(indio_dev);
792 mutex_lock(&data->mutex);
793 if (state == data->dready_trigger_on)
796 ret = regmap_update_bits(data->regmap, BMC150_MAGN_REG_INT_DRDY,
797 BMC150_MAGN_MASK_DRDY_EN,
798 state << BMC150_MAGN_SHIFT_DRDY_EN);
802 data->dready_trigger_on = state;
805 ret = bmc150_magn_reset_intr(data);
809 mutex_unlock(&data->mutex);
814 mutex_unlock(&data->mutex);
818 static const struct iio_trigger_ops bmc150_magn_trigger_ops = {
819 .set_trigger_state = bmc150_magn_data_rdy_trigger_set_state,
820 .try_reenable = bmc150_magn_trig_try_reen,
823 static int bmc150_magn_buffer_preenable(struct iio_dev *indio_dev)
825 struct bmc150_magn_data *data = iio_priv(indio_dev);
827 return bmc150_magn_set_power_state(data, true);
830 static int bmc150_magn_buffer_postdisable(struct iio_dev *indio_dev)
832 struct bmc150_magn_data *data = iio_priv(indio_dev);
834 return bmc150_magn_set_power_state(data, false);
837 static const struct iio_buffer_setup_ops bmc150_magn_buffer_setup_ops = {
838 .preenable = bmc150_magn_buffer_preenable,
839 .postenable = iio_triggered_buffer_postenable,
840 .predisable = iio_triggered_buffer_predisable,
841 .postdisable = bmc150_magn_buffer_postdisable,
844 static const char *bmc150_magn_match_acpi_device(struct device *dev)
846 const struct acpi_device_id *id;
848 id = acpi_match_device(dev->driver->acpi_match_table, dev);
852 return dev_name(dev);
855 int bmc150_magn_probe(struct device *dev, struct regmap *regmap,
856 int irq, const char *name)
858 struct bmc150_magn_data *data;
859 struct iio_dev *indio_dev;
862 indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
866 data = iio_priv(indio_dev);
867 dev_set_drvdata(dev, indio_dev);
868 data->regmap = regmap;
872 ret = iio_read_mount_matrix(dev, "mount-matrix",
877 if (!name && ACPI_HANDLE(dev))
878 name = bmc150_magn_match_acpi_device(dev);
880 mutex_init(&data->mutex);
882 ret = bmc150_magn_init(data);
886 indio_dev->dev.parent = dev;
887 indio_dev->channels = bmc150_magn_channels;
888 indio_dev->num_channels = ARRAY_SIZE(bmc150_magn_channels);
889 indio_dev->available_scan_masks = bmc150_magn_scan_masks;
890 indio_dev->name = name;
891 indio_dev->modes = INDIO_DIRECT_MODE;
892 indio_dev->info = &bmc150_magn_info;
895 data->dready_trig = devm_iio_trigger_alloc(dev,
899 if (!data->dready_trig) {
901 dev_err(dev, "iio trigger alloc failed\n");
905 data->dready_trig->dev.parent = dev;
906 data->dready_trig->ops = &bmc150_magn_trigger_ops;
907 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
908 ret = iio_trigger_register(data->dready_trig);
910 dev_err(dev, "iio trigger register failed\n");
914 ret = request_threaded_irq(irq,
915 iio_trigger_generic_data_rdy_poll,
917 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
918 BMC150_MAGN_IRQ_NAME,
921 dev_err(dev, "request irq %d failed\n", irq);
922 goto err_trigger_unregister;
926 ret = iio_triggered_buffer_setup(indio_dev,
927 iio_pollfunc_store_time,
928 bmc150_magn_trigger_handler,
929 &bmc150_magn_buffer_setup_ops);
931 dev_err(dev, "iio triggered buffer setup failed\n");
935 ret = pm_runtime_set_active(dev);
937 goto err_buffer_cleanup;
939 pm_runtime_enable(dev);
940 pm_runtime_set_autosuspend_delay(dev,
941 BMC150_MAGN_AUTO_SUSPEND_DELAY_MS);
942 pm_runtime_use_autosuspend(dev);
944 ret = iio_device_register(indio_dev);
946 dev_err(dev, "unable to register iio device\n");
947 goto err_buffer_cleanup;
950 dev_dbg(dev, "Registered device %s\n", name);
954 iio_triggered_buffer_cleanup(indio_dev);
957 free_irq(irq, data->dready_trig);
958 err_trigger_unregister:
959 if (data->dready_trig)
960 iio_trigger_unregister(data->dready_trig);
962 bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND, true);
965 EXPORT_SYMBOL(bmc150_magn_probe);
967 int bmc150_magn_remove(struct device *dev)
969 struct iio_dev *indio_dev = dev_get_drvdata(dev);
970 struct bmc150_magn_data *data = iio_priv(indio_dev);
972 iio_device_unregister(indio_dev);
974 pm_runtime_disable(dev);
975 pm_runtime_set_suspended(dev);
976 pm_runtime_put_noidle(dev);
978 iio_triggered_buffer_cleanup(indio_dev);
981 free_irq(data->irq, data->dready_trig);
983 if (data->dready_trig)
984 iio_trigger_unregister(data->dready_trig);
986 mutex_lock(&data->mutex);
987 bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND, true);
988 mutex_unlock(&data->mutex);
992 EXPORT_SYMBOL(bmc150_magn_remove);
995 static int bmc150_magn_runtime_suspend(struct device *dev)
997 struct iio_dev *indio_dev = dev_get_drvdata(dev);
998 struct bmc150_magn_data *data = iio_priv(indio_dev);
1001 mutex_lock(&data->mutex);
1002 ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SLEEP,
1004 mutex_unlock(&data->mutex);
1006 dev_err(dev, "powering off device failed\n");
1013 * Should be called with data->mutex held.
1015 static int bmc150_magn_runtime_resume(struct device *dev)
1017 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1018 struct bmc150_magn_data *data = iio_priv(indio_dev);
1020 return bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_NORMAL,
1025 #ifdef CONFIG_PM_SLEEP
1026 static int bmc150_magn_suspend(struct device *dev)
1028 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1029 struct bmc150_magn_data *data = iio_priv(indio_dev);
1032 mutex_lock(&data->mutex);
1033 ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SLEEP,
1035 mutex_unlock(&data->mutex);
1040 static int bmc150_magn_resume(struct device *dev)
1042 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1043 struct bmc150_magn_data *data = iio_priv(indio_dev);
1046 mutex_lock(&data->mutex);
1047 ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_NORMAL,
1049 mutex_unlock(&data->mutex);
1055 const struct dev_pm_ops bmc150_magn_pm_ops = {
1056 SET_SYSTEM_SLEEP_PM_OPS(bmc150_magn_suspend, bmc150_magn_resume)
1057 SET_RUNTIME_PM_OPS(bmc150_magn_runtime_suspend,
1058 bmc150_magn_runtime_resume, NULL)
1060 EXPORT_SYMBOL(bmc150_magn_pm_ops);
1062 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1063 MODULE_LICENSE("GPL v2");
1064 MODULE_DESCRIPTION("BMC150 magnetometer core driver");