2 * BMG160 Gyro Sensor driver
3 * Copyright (c) 2014, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 #include <linux/module.h>
16 #include <linux/i2c.h>
17 #include <linux/interrupt.h>
18 #include <linux/delay.h>
19 #include <linux/slab.h>
20 #include <linux/acpi.h>
21 #include <linux/gpio/consumer.h>
23 #include <linux/pm_runtime.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/events.h>
29 #include <linux/iio/trigger_consumer.h>
30 #include <linux/iio/triggered_buffer.h>
32 #define BMG160_DRV_NAME "bmg160"
33 #define BMG160_IRQ_NAME "bmg160_event"
34 #define BMG160_GPIO_NAME "gpio_int"
36 #define BMG160_REG_CHIP_ID 0x00
37 #define BMG160_CHIP_ID_VAL 0x0F
39 #define BMG160_REG_PMU_LPW 0x11
40 #define BMG160_MODE_NORMAL 0x00
41 #define BMG160_MODE_DEEP_SUSPEND 0x20
42 #define BMG160_MODE_SUSPEND 0x80
44 #define BMG160_REG_RANGE 0x0F
46 #define BMG160_RANGE_2000DPS 0
47 #define BMG160_RANGE_1000DPS 1
48 #define BMG160_RANGE_500DPS 2
49 #define BMG160_RANGE_250DPS 3
50 #define BMG160_RANGE_125DPS 4
52 #define BMG160_REG_PMU_BW 0x10
53 #define BMG160_NO_FILTER 0
54 #define BMG160_DEF_BW 100
56 #define BMG160_REG_INT_MAP_0 0x17
57 #define BMG160_INT_MAP_0_BIT_ANY BIT(1)
59 #define BMG160_REG_INT_MAP_1 0x18
60 #define BMG160_INT_MAP_1_BIT_NEW_DATA BIT(0)
62 #define BMG160_REG_INT_RST_LATCH 0x21
63 #define BMG160_INT_MODE_LATCH_RESET 0x80
64 #define BMG160_INT_MODE_LATCH_INT 0x0F
65 #define BMG160_INT_MODE_NON_LATCH_INT 0x00
67 #define BMG160_REG_INT_EN_0 0x15
68 #define BMG160_DATA_ENABLE_INT BIT(7)
70 #define BMG160_REG_XOUT_L 0x02
71 #define BMG160_AXIS_TO_REG(axis) (BMG160_REG_XOUT_L + (axis * 2))
73 #define BMG160_REG_SLOPE_THRES 0x1B
74 #define BMG160_SLOPE_THRES_MASK 0x0F
76 #define BMG160_REG_MOTION_INTR 0x1C
77 #define BMG160_INT_MOTION_X BIT(0)
78 #define BMG160_INT_MOTION_Y BIT(1)
79 #define BMG160_INT_MOTION_Z BIT(2)
80 #define BMG160_ANY_DUR_MASK 0x30
81 #define BMG160_ANY_DUR_SHIFT 4
83 #define BMG160_REG_INT_STATUS_2 0x0B
84 #define BMG160_ANY_MOTION_MASK 0x07
86 #define BMG160_REG_TEMP 0x08
87 #define BMG160_TEMP_CENTER_VAL 23
89 #define BMG160_MAX_STARTUP_TIME_MS 80
91 #define BMG160_AUTO_SUSPEND_DELAY_MS 2000
94 struct i2c_client *client;
95 struct iio_trigger *dready_trig;
96 struct iio_trigger *motion_trig;
103 bool dready_trigger_on;
104 bool motion_trigger_on;
114 static const struct {
117 } bmg160_samp_freq_table[] = { {100, 0x07},
123 static const struct {
126 } bmg160_scale_table[] = { { 1065, BMG160_RANGE_2000DPS},
127 { 532, BMG160_RANGE_1000DPS},
128 { 266, BMG160_RANGE_500DPS},
129 { 133, BMG160_RANGE_250DPS},
130 { 66, BMG160_RANGE_125DPS} };
132 static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
136 ret = i2c_smbus_write_byte_data(data->client,
137 BMG160_REG_PMU_LPW, mode);
139 dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
146 static int bmg160_convert_freq_to_bit(int val)
150 for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
151 if (bmg160_samp_freq_table[i].val == val)
152 return bmg160_samp_freq_table[i].bw_bits;
158 static int bmg160_set_bw(struct bmg160_data *data, int val)
163 bw_bits = bmg160_convert_freq_to_bit(val);
167 ret = i2c_smbus_write_byte_data(data->client, BMG160_REG_PMU_BW,
170 dev_err(&data->client->dev, "Error writing reg_pmu_bw\n");
174 data->bw_bits = bw_bits;
179 static int bmg160_chip_init(struct bmg160_data *data)
183 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_CHIP_ID);
185 dev_err(&data->client->dev, "Error reading reg_chip_id\n");
189 dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
190 if (ret != BMG160_CHIP_ID_VAL) {
191 dev_err(&data->client->dev, "invalid chip %x\n", ret);
195 ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
199 /* Wait upto 500 ms to be ready after changing mode */
200 usleep_range(500, 1000);
203 ret = bmg160_set_bw(data, BMG160_DEF_BW);
207 /* Set Default Range */
208 ret = i2c_smbus_write_byte_data(data->client,
210 BMG160_RANGE_500DPS);
212 dev_err(&data->client->dev, "Error writing reg_range\n");
215 data->dps_range = BMG160_RANGE_500DPS;
217 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_SLOPE_THRES);
219 dev_err(&data->client->dev, "Error reading reg_slope_thres\n");
222 data->slope_thres = ret;
224 /* Set default interrupt mode */
225 ret = i2c_smbus_write_byte_data(data->client,
226 BMG160_REG_INT_RST_LATCH,
227 BMG160_INT_MODE_LATCH_INT |
228 BMG160_INT_MODE_LATCH_RESET);
230 dev_err(&data->client->dev,
231 "Error writing reg_motion_intr\n");
238 static int bmg160_set_power_state(struct bmg160_data *data, bool on)
240 #ifdef CONFIG_PM_RUNTIME
244 ret = pm_runtime_get_sync(&data->client->dev);
246 pm_runtime_mark_last_busy(&data->client->dev);
247 ret = pm_runtime_put_autosuspend(&data->client->dev);
251 dev_err(&data->client->dev,
252 "Failed: bmg160_set_power_state for %d\n", on);
260 static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
265 /* Enable/Disable INT_MAP0 mapping */
266 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_0);
268 dev_err(&data->client->dev, "Error reading reg_int_map0\n");
272 ret |= BMG160_INT_MAP_0_BIT_ANY;
274 ret &= ~BMG160_INT_MAP_0_BIT_ANY;
276 ret = i2c_smbus_write_byte_data(data->client,
277 BMG160_REG_INT_MAP_0,
280 dev_err(&data->client->dev, "Error writing reg_int_map0\n");
284 /* Enable/Disable slope interrupts */
286 /* Update slope thres */
287 ret = i2c_smbus_write_byte_data(data->client,
288 BMG160_REG_SLOPE_THRES,
291 dev_err(&data->client->dev,
292 "Error writing reg_slope_thres\n");
296 ret = i2c_smbus_write_byte_data(data->client,
297 BMG160_REG_MOTION_INTR,
298 BMG160_INT_MOTION_X |
299 BMG160_INT_MOTION_Y |
300 BMG160_INT_MOTION_Z);
302 dev_err(&data->client->dev,
303 "Error writing reg_motion_intr\n");
308 * New data interrupt is always non-latched,
309 * which will have higher priority, so no need
310 * to set latched mode, we will be flooded anyway with INTR
312 if (!data->dready_trigger_on) {
313 ret = i2c_smbus_write_byte_data(data->client,
314 BMG160_REG_INT_RST_LATCH,
315 BMG160_INT_MODE_LATCH_INT |
316 BMG160_INT_MODE_LATCH_RESET);
318 dev_err(&data->client->dev,
319 "Error writing reg_rst_latch\n");
324 ret = i2c_smbus_write_byte_data(data->client,
326 BMG160_DATA_ENABLE_INT);
329 ret = i2c_smbus_write_byte_data(data->client,
334 dev_err(&data->client->dev, "Error writing reg_int_en0\n");
341 static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
346 /* Enable/Disable INT_MAP1 mapping */
347 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_1);
349 dev_err(&data->client->dev, "Error reading reg_int_map1\n");
354 ret |= BMG160_INT_MAP_1_BIT_NEW_DATA;
356 ret &= ~BMG160_INT_MAP_1_BIT_NEW_DATA;
358 ret = i2c_smbus_write_byte_data(data->client,
359 BMG160_REG_INT_MAP_1,
362 dev_err(&data->client->dev, "Error writing reg_int_map1\n");
367 ret = i2c_smbus_write_byte_data(data->client,
368 BMG160_REG_INT_RST_LATCH,
369 BMG160_INT_MODE_NON_LATCH_INT |
370 BMG160_INT_MODE_LATCH_RESET);
372 dev_err(&data->client->dev,
373 "Error writing reg_rst_latch\n");
377 ret = i2c_smbus_write_byte_data(data->client,
379 BMG160_DATA_ENABLE_INT);
382 /* Restore interrupt mode */
383 ret = i2c_smbus_write_byte_data(data->client,
384 BMG160_REG_INT_RST_LATCH,
385 BMG160_INT_MODE_LATCH_INT |
386 BMG160_INT_MODE_LATCH_RESET);
388 dev_err(&data->client->dev,
389 "Error writing reg_rst_latch\n");
393 ret = i2c_smbus_write_byte_data(data->client,
399 dev_err(&data->client->dev, "Error writing reg_int_en0\n");
406 static int bmg160_get_bw(struct bmg160_data *data, int *val)
410 for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) {
411 if (bmg160_samp_freq_table[i].bw_bits == data->bw_bits) {
412 *val = bmg160_samp_freq_table[i].val;
420 static int bmg160_set_scale(struct bmg160_data *data, int val)
424 for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
425 if (bmg160_scale_table[i].scale == val) {
426 ret = i2c_smbus_write_byte_data(
429 bmg160_scale_table[i].dps_range);
431 dev_err(&data->client->dev,
432 "Error writing reg_range\n");
435 data->dps_range = bmg160_scale_table[i].dps_range;
443 static int bmg160_get_temp(struct bmg160_data *data, int *val)
447 mutex_lock(&data->mutex);
448 ret = bmg160_set_power_state(data, true);
450 mutex_unlock(&data->mutex);
454 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_TEMP);
456 dev_err(&data->client->dev, "Error reading reg_temp\n");
457 bmg160_set_power_state(data, false);
458 mutex_unlock(&data->mutex);
462 *val = sign_extend32(ret, 7);
463 ret = bmg160_set_power_state(data, false);
464 mutex_unlock(&data->mutex);
471 static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
475 mutex_lock(&data->mutex);
476 ret = bmg160_set_power_state(data, true);
478 mutex_unlock(&data->mutex);
482 ret = i2c_smbus_read_word_data(data->client, BMG160_AXIS_TO_REG(axis));
484 dev_err(&data->client->dev, "Error reading axis %d\n", axis);
485 bmg160_set_power_state(data, false);
486 mutex_unlock(&data->mutex);
490 *val = sign_extend32(ret, 15);
491 ret = bmg160_set_power_state(data, false);
492 mutex_unlock(&data->mutex);
499 static int bmg160_read_raw(struct iio_dev *indio_dev,
500 struct iio_chan_spec const *chan,
501 int *val, int *val2, long mask)
503 struct bmg160_data *data = iio_priv(indio_dev);
507 case IIO_CHAN_INFO_RAW:
508 switch (chan->type) {
510 return bmg160_get_temp(data, val);
512 if (iio_buffer_enabled(indio_dev))
515 return bmg160_get_axis(data, chan->scan_index,
520 case IIO_CHAN_INFO_OFFSET:
521 if (chan->type == IIO_TEMP) {
522 *val = BMG160_TEMP_CENTER_VAL;
526 case IIO_CHAN_INFO_SCALE:
528 switch (chan->type) {
531 return IIO_VAL_INT_PLUS_MICRO;
536 for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
537 if (bmg160_scale_table[i].dps_range ==
539 *val2 = bmg160_scale_table[i].scale;
540 return IIO_VAL_INT_PLUS_MICRO;
548 case IIO_CHAN_INFO_SAMP_FREQ:
550 mutex_lock(&data->mutex);
551 ret = bmg160_get_bw(data, val);
552 mutex_unlock(&data->mutex);
559 static int bmg160_write_raw(struct iio_dev *indio_dev,
560 struct iio_chan_spec const *chan,
561 int val, int val2, long mask)
563 struct bmg160_data *data = iio_priv(indio_dev);
567 case IIO_CHAN_INFO_SAMP_FREQ:
568 mutex_lock(&data->mutex);
570 * Section 4.2 of spec
571 * In suspend mode, the only supported operations are reading
572 * registers as well as writing to the (0x14) softreset
573 * register. Since we will be in suspend mode by default, change
574 * mode to power on for other writes.
576 ret = bmg160_set_power_state(data, true);
578 mutex_unlock(&data->mutex);
581 ret = bmg160_set_bw(data, val);
583 bmg160_set_power_state(data, false);
584 mutex_unlock(&data->mutex);
587 ret = bmg160_set_power_state(data, false);
588 mutex_unlock(&data->mutex);
590 case IIO_CHAN_INFO_SCALE:
594 mutex_lock(&data->mutex);
595 /* Refer to comments above for the suspend mode ops */
596 ret = bmg160_set_power_state(data, true);
598 mutex_unlock(&data->mutex);
601 ret = bmg160_set_scale(data, val2);
603 bmg160_set_power_state(data, false);
604 mutex_unlock(&data->mutex);
607 ret = bmg160_set_power_state(data, false);
608 mutex_unlock(&data->mutex);
617 static int bmg160_read_event(struct iio_dev *indio_dev,
618 const struct iio_chan_spec *chan,
619 enum iio_event_type type,
620 enum iio_event_direction dir,
621 enum iio_event_info info,
624 struct bmg160_data *data = iio_priv(indio_dev);
628 case IIO_EV_INFO_VALUE:
629 *val = data->slope_thres & BMG160_SLOPE_THRES_MASK;
638 static int bmg160_write_event(struct iio_dev *indio_dev,
639 const struct iio_chan_spec *chan,
640 enum iio_event_type type,
641 enum iio_event_direction dir,
642 enum iio_event_info info,
645 struct bmg160_data *data = iio_priv(indio_dev);
648 case IIO_EV_INFO_VALUE:
649 if (data->ev_enable_state)
651 data->slope_thres &= ~BMG160_SLOPE_THRES_MASK;
652 data->slope_thres |= (val & BMG160_SLOPE_THRES_MASK);
661 static int bmg160_read_event_config(struct iio_dev *indio_dev,
662 const struct iio_chan_spec *chan,
663 enum iio_event_type type,
664 enum iio_event_direction dir)
667 struct bmg160_data *data = iio_priv(indio_dev);
669 return data->ev_enable_state;
672 static int bmg160_write_event_config(struct iio_dev *indio_dev,
673 const struct iio_chan_spec *chan,
674 enum iio_event_type type,
675 enum iio_event_direction dir,
678 struct bmg160_data *data = iio_priv(indio_dev);
681 if (state && data->ev_enable_state)
684 mutex_lock(&data->mutex);
686 if (!state && data->motion_trigger_on) {
687 data->ev_enable_state = 0;
688 mutex_unlock(&data->mutex);
692 * We will expect the enable and disable to do operation in
693 * in reverse order. This will happen here anyway as our
694 * resume operation uses sync mode runtime pm calls, the
695 * suspend operation will be delayed by autosuspend delay
696 * So the disable operation will still happen in reverse of
697 * enable operation. When runtime pm is disabled the mode
698 * is always on so sequence doesn't matter
700 ret = bmg160_set_power_state(data, state);
702 mutex_unlock(&data->mutex);
706 ret = bmg160_setup_any_motion_interrupt(data, state);
708 mutex_unlock(&data->mutex);
712 data->ev_enable_state = state;
713 mutex_unlock(&data->mutex);
718 static int bmg160_validate_trigger(struct iio_dev *indio_dev,
719 struct iio_trigger *trig)
721 struct bmg160_data *data = iio_priv(indio_dev);
723 if (data->dready_trig != trig && data->motion_trig != trig)
729 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100 200 400 1000 2000");
731 static IIO_CONST_ATTR(in_anglvel_scale_available,
732 "0.001065 0.000532 0.000266 0.000133 0.000066");
734 static struct attribute *bmg160_attributes[] = {
735 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
736 &iio_const_attr_in_anglvel_scale_available.dev_attr.attr,
740 static const struct attribute_group bmg160_attrs_group = {
741 .attrs = bmg160_attributes,
744 static const struct iio_event_spec bmg160_event = {
745 .type = IIO_EV_TYPE_ROC,
746 .dir = IIO_EV_DIR_RISING | IIO_EV_DIR_FALLING,
747 .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
748 BIT(IIO_EV_INFO_ENABLE)
751 #define BMG160_CHANNEL(_axis) { \
752 .type = IIO_ANGL_VEL, \
754 .channel2 = IIO_MOD_##_axis, \
755 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
756 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
757 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
758 .scan_index = AXIS_##_axis, \
764 .event_spec = &bmg160_event, \
765 .num_event_specs = 1 \
768 static const struct iio_chan_spec bmg160_channels[] = {
771 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
772 BIT(IIO_CHAN_INFO_SCALE) |
773 BIT(IIO_CHAN_INFO_OFFSET),
779 IIO_CHAN_SOFT_TIMESTAMP(3),
782 static const struct iio_info bmg160_info = {
783 .attrs = &bmg160_attrs_group,
784 .read_raw = bmg160_read_raw,
785 .write_raw = bmg160_write_raw,
786 .read_event_value = bmg160_read_event,
787 .write_event_value = bmg160_write_event,
788 .write_event_config = bmg160_write_event_config,
789 .read_event_config = bmg160_read_event_config,
790 .validate_trigger = bmg160_validate_trigger,
791 .driver_module = THIS_MODULE,
794 static irqreturn_t bmg160_trigger_handler(int irq, void *p)
796 struct iio_poll_func *pf = p;
797 struct iio_dev *indio_dev = pf->indio_dev;
798 struct bmg160_data *data = iio_priv(indio_dev);
801 mutex_lock(&data->mutex);
802 for_each_set_bit(bit, indio_dev->buffer->scan_mask,
803 indio_dev->masklength) {
804 ret = i2c_smbus_read_word_data(data->client,
805 BMG160_AXIS_TO_REG(bit));
807 mutex_unlock(&data->mutex);
810 data->buffer[i++] = ret;
812 mutex_unlock(&data->mutex);
814 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
817 iio_trigger_notify_done(indio_dev->trig);
822 static int bmg160_trig_try_reen(struct iio_trigger *trig)
824 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
825 struct bmg160_data *data = iio_priv(indio_dev);
828 /* new data interrupts don't need ack */
829 if (data->dready_trigger_on)
832 /* Set latched mode interrupt and clear any latched interrupt */
833 ret = i2c_smbus_write_byte_data(data->client,
834 BMG160_REG_INT_RST_LATCH,
835 BMG160_INT_MODE_LATCH_INT |
836 BMG160_INT_MODE_LATCH_RESET);
838 dev_err(&data->client->dev, "Error writing reg_rst_latch\n");
845 static int bmg160_data_rdy_trigger_set_state(struct iio_trigger *trig,
848 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
849 struct bmg160_data *data = iio_priv(indio_dev);
852 mutex_lock(&data->mutex);
854 if (!state && data->ev_enable_state && data->motion_trigger_on) {
855 data->motion_trigger_on = false;
856 mutex_unlock(&data->mutex);
861 * Refer to comment in bmg160_write_event_config for
862 * enable/disable operation order
864 ret = bmg160_set_power_state(data, state);
866 mutex_unlock(&data->mutex);
869 if (data->motion_trig == trig)
870 ret = bmg160_setup_any_motion_interrupt(data, state);
872 ret = bmg160_setup_new_data_interrupt(data, state);
874 mutex_unlock(&data->mutex);
877 if (data->motion_trig == trig)
878 data->motion_trigger_on = state;
880 data->dready_trigger_on = state;
882 mutex_unlock(&data->mutex);
887 static const struct iio_trigger_ops bmg160_trigger_ops = {
888 .set_trigger_state = bmg160_data_rdy_trigger_set_state,
889 .try_reenable = bmg160_trig_try_reen,
890 .owner = THIS_MODULE,
893 static irqreturn_t bmg160_event_handler(int irq, void *private)
895 struct iio_dev *indio_dev = private;
896 struct bmg160_data *data = iio_priv(indio_dev);
900 ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_STATUS_2);
902 dev_err(&data->client->dev, "Error reading reg_int_status2\n");
903 goto ack_intr_status;
907 dir = IIO_EV_DIR_RISING;
909 dir = IIO_EV_DIR_FALLING;
911 if (ret & BMG160_ANY_MOTION_MASK)
912 iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
920 if (!data->dready_trigger_on) {
921 ret = i2c_smbus_write_byte_data(data->client,
922 BMG160_REG_INT_RST_LATCH,
923 BMG160_INT_MODE_LATCH_INT |
924 BMG160_INT_MODE_LATCH_RESET);
926 dev_err(&data->client->dev,
927 "Error writing reg_rst_latch\n");
933 static irqreturn_t bmg160_data_rdy_trig_poll(int irq, void *private)
935 struct iio_dev *indio_dev = private;
936 struct bmg160_data *data = iio_priv(indio_dev);
938 data->timestamp = iio_get_time_ns();
940 if (data->dready_trigger_on)
941 iio_trigger_poll(data->dready_trig);
942 else if (data->motion_trigger_on)
943 iio_trigger_poll(data->motion_trig);
945 if (data->ev_enable_state)
946 return IRQ_WAKE_THREAD;
952 static int bmg160_gpio_probe(struct i2c_client *client,
953 struct bmg160_data *data)
957 struct gpio_desc *gpio;
965 /* data ready gpio interrupt pin */
966 gpio = devm_gpiod_get_index(dev, BMG160_GPIO_NAME, 0);
968 dev_err(dev, "acpi gpio get index failed\n");
969 return PTR_ERR(gpio);
972 ret = gpiod_direction_input(gpio);
976 ret = gpiod_to_irq(gpio);
978 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
983 static const char *bmg160_match_acpi_device(struct device *dev)
985 const struct acpi_device_id *id;
987 id = acpi_match_device(dev->driver->acpi_match_table, dev);
991 return dev_name(dev);
994 static int bmg160_probe(struct i2c_client *client,
995 const struct i2c_device_id *id)
997 struct bmg160_data *data;
998 struct iio_dev *indio_dev;
1000 const char *name = NULL;
1002 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1006 data = iio_priv(indio_dev);
1007 i2c_set_clientdata(client, indio_dev);
1008 data->client = client;
1010 ret = bmg160_chip_init(data);
1014 mutex_init(&data->mutex);
1019 if (ACPI_HANDLE(&client->dev))
1020 name = bmg160_match_acpi_device(&client->dev);
1022 indio_dev->dev.parent = &client->dev;
1023 indio_dev->channels = bmg160_channels;
1024 indio_dev->num_channels = ARRAY_SIZE(bmg160_channels);
1025 indio_dev->name = name;
1026 indio_dev->modes = INDIO_DIRECT_MODE;
1027 indio_dev->info = &bmg160_info;
1029 if (client->irq <= 0)
1030 client->irq = bmg160_gpio_probe(client, data);
1032 if (client->irq > 0) {
1033 ret = devm_request_threaded_irq(&client->dev,
1035 bmg160_data_rdy_trig_poll,
1036 bmg160_event_handler,
1037 IRQF_TRIGGER_RISING,
1043 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1047 if (!data->dready_trig)
1050 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1051 "%s-any-motion-dev%d",
1054 if (!data->motion_trig)
1057 data->dready_trig->dev.parent = &client->dev;
1058 data->dready_trig->ops = &bmg160_trigger_ops;
1059 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1060 ret = iio_trigger_register(data->dready_trig);
1064 data->motion_trig->dev.parent = &client->dev;
1065 data->motion_trig->ops = &bmg160_trigger_ops;
1066 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1067 ret = iio_trigger_register(data->motion_trig);
1069 data->motion_trig = NULL;
1070 goto err_trigger_unregister;
1073 ret = iio_triggered_buffer_setup(indio_dev,
1075 bmg160_trigger_handler,
1078 dev_err(&client->dev,
1079 "iio triggered buffer setup failed\n");
1080 goto err_trigger_unregister;
1084 ret = iio_device_register(indio_dev);
1086 dev_err(&client->dev, "unable to register iio device\n");
1087 goto err_buffer_cleanup;
1090 ret = pm_runtime_set_active(&client->dev);
1092 goto err_iio_unregister;
1094 pm_runtime_enable(&client->dev);
1095 pm_runtime_set_autosuspend_delay(&client->dev,
1096 BMG160_AUTO_SUSPEND_DELAY_MS);
1097 pm_runtime_use_autosuspend(&client->dev);
1102 iio_device_unregister(indio_dev);
1104 if (data->dready_trig)
1105 iio_triggered_buffer_cleanup(indio_dev);
1106 err_trigger_unregister:
1107 if (data->dready_trig)
1108 iio_trigger_unregister(data->dready_trig);
1109 if (data->motion_trig)
1110 iio_trigger_unregister(data->motion_trig);
1115 static int bmg160_remove(struct i2c_client *client)
1117 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1118 struct bmg160_data *data = iio_priv(indio_dev);
1120 pm_runtime_disable(&client->dev);
1121 pm_runtime_set_suspended(&client->dev);
1122 pm_runtime_put_noidle(&client->dev);
1124 iio_device_unregister(indio_dev);
1126 if (data->dready_trig) {
1127 iio_triggered_buffer_cleanup(indio_dev);
1128 iio_trigger_unregister(data->dready_trig);
1129 iio_trigger_unregister(data->motion_trig);
1132 mutex_lock(&data->mutex);
1133 bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
1134 mutex_unlock(&data->mutex);
1139 #ifdef CONFIG_PM_SLEEP
1140 static int bmg160_suspend(struct device *dev)
1142 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1143 struct bmg160_data *data = iio_priv(indio_dev);
1145 mutex_lock(&data->mutex);
1146 bmg160_set_mode(data, BMG160_MODE_SUSPEND);
1147 mutex_unlock(&data->mutex);
1152 static int bmg160_resume(struct device *dev)
1154 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1155 struct bmg160_data *data = iio_priv(indio_dev);
1157 mutex_lock(&data->mutex);
1158 if (data->dready_trigger_on || data->motion_trigger_on ||
1159 data->ev_enable_state)
1160 bmg160_set_mode(data, BMG160_MODE_NORMAL);
1161 mutex_unlock(&data->mutex);
1167 #ifdef CONFIG_PM_RUNTIME
1168 static int bmg160_runtime_suspend(struct device *dev)
1170 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1171 struct bmg160_data *data = iio_priv(indio_dev);
1173 return bmg160_set_mode(data, BMG160_MODE_SUSPEND);
1176 static int bmg160_runtime_resume(struct device *dev)
1178 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1179 struct bmg160_data *data = iio_priv(indio_dev);
1182 ret = bmg160_set_mode(data, BMG160_MODE_NORMAL);
1186 msleep_interruptible(BMG160_MAX_STARTUP_TIME_MS);
1192 static const struct dev_pm_ops bmg160_pm_ops = {
1193 SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
1194 SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
1195 bmg160_runtime_resume, NULL)
1198 static const struct acpi_device_id bmg160_acpi_match[] = {
1204 MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
1206 static const struct i2c_device_id bmg160_id[] = {
1212 MODULE_DEVICE_TABLE(i2c, bmg160_id);
1214 static struct i2c_driver bmg160_driver = {
1216 .name = BMG160_DRV_NAME,
1217 .acpi_match_table = ACPI_PTR(bmg160_acpi_match),
1218 .pm = &bmg160_pm_ops,
1220 .probe = bmg160_probe,
1221 .remove = bmg160_remove,
1222 .id_table = bmg160_id,
1224 module_i2c_driver(bmg160_driver);
1226 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1227 MODULE_LICENSE("GPL v2");
1228 MODULE_DESCRIPTION("BMG160 Gyro driver");