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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / iio / imu / kmx61.c
blobe67466100aff4dca53110295a6912f2f74e9bdef
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * KMX61 - Kionix 6-axis Accelerometer/Magnetometer
4 *
5 * Copyright (c) 2014, Intel Corporation.
6 *
7 * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F).
8 */
9
10 #include <linux/module.h>
11 #include <linux/i2c.h>
12 #include <linux/acpi.h>
13 #include <linux/interrupt.h>
14 #include <linux/pm.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/iio/iio.h>
17 #include <linux/iio/sysfs.h>
18 #include <linux/iio/events.h>
19 #include <linux/iio/trigger.h>
20 #include <linux/iio/buffer.h>
21 #include <linux/iio/triggered_buffer.h>
22 #include <linux/iio/trigger_consumer.h>
23
24 #define KMX61_DRV_NAME "kmx61"
25 #define KMX61_IRQ_NAME "kmx61_event"
26
27 #define KMX61_REG_WHO_AM_I 0x00
28 #define KMX61_REG_INS1 0x01
29 #define KMX61_REG_INS2 0x02
30
31 /*
32 * three 16-bit accelerometer output registers for X/Y/Z axis
33 * we use only XOUT_L as a base register, all other addresses
34 * can be obtained by applying an offset and are provided here
35 * only for clarity.
36 */
37 #define KMX61_ACC_XOUT_L 0x0A
38 #define KMX61_ACC_XOUT_H 0x0B
39 #define KMX61_ACC_YOUT_L 0x0C
40 #define KMX61_ACC_YOUT_H 0x0D
41 #define KMX61_ACC_ZOUT_L 0x0E
42 #define KMX61_ACC_ZOUT_H 0x0F
43
44 /*
45 * one 16-bit temperature output register
46 */
47 #define KMX61_TEMP_L 0x10
48 #define KMX61_TEMP_H 0x11
49
50 /*
51 * three 16-bit magnetometer output registers for X/Y/Z axis
52 */
53 #define KMX61_MAG_XOUT_L 0x12
54 #define KMX61_MAG_XOUT_H 0x13
55 #define KMX61_MAG_YOUT_L 0x14
56 #define KMX61_MAG_YOUT_H 0x15
57 #define KMX61_MAG_ZOUT_L 0x16
58 #define KMX61_MAG_ZOUT_H 0x17
59
60 #define KMX61_REG_INL 0x28
61 #define KMX61_REG_STBY 0x29
62 #define KMX61_REG_CTRL1 0x2A
63 #define KMX61_REG_CTRL2 0x2B
64 #define KMX61_REG_ODCNTL 0x2C
65 #define KMX61_REG_INC1 0x2D
66
67 #define KMX61_REG_WUF_THRESH 0x3D
68 #define KMX61_REG_WUF_TIMER 0x3E
69
70 #define KMX61_ACC_STBY_BIT BIT(0)
71 #define KMX61_MAG_STBY_BIT BIT(1)
72 #define KMX61_ACT_STBY_BIT BIT(7)
73
74 #define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT)
75
76 #define KMX61_REG_INS1_BIT_WUFS BIT(1)
77
78 #define KMX61_REG_INS2_BIT_ZP BIT(0)
79 #define KMX61_REG_INS2_BIT_ZN BIT(1)
80 #define KMX61_REG_INS2_BIT_YP BIT(2)
81 #define KMX61_REG_INS2_BIT_YN BIT(3)
82 #define KMX61_REG_INS2_BIT_XP BIT(4)
83 #define KMX61_REG_INS2_BIT_XN BIT(5)
84
85 #define KMX61_REG_CTRL1_GSEL_MASK 0x03
86
87 #define KMX61_REG_CTRL1_BIT_RES BIT(4)
88 #define KMX61_REG_CTRL1_BIT_DRDYE BIT(5)
89 #define KMX61_REG_CTRL1_BIT_WUFE BIT(6)
90 #define KMX61_REG_CTRL1_BIT_BTSE BIT(7)
91
92 #define KMX61_REG_INC1_BIT_WUFS BIT(0)
93 #define KMX61_REG_INC1_BIT_DRDYM BIT(1)
94 #define KMX61_REG_INC1_BIT_DRDYA BIT(2)
95 #define KMX61_REG_INC1_BIT_IEN BIT(5)
96
97 #define KMX61_ACC_ODR_SHIFT 0
98 #define KMX61_MAG_ODR_SHIFT 4
99 #define KMX61_ACC_ODR_MASK 0x0F
100 #define KMX61_MAG_ODR_MASK 0xF0
101
102 #define KMX61_OWUF_MASK 0x7
103
104 #define KMX61_DEFAULT_WAKE_THRESH 1
105 #define KMX61_DEFAULT_WAKE_DURATION 1
106
107 #define KMX61_SLEEP_DELAY_MS 2000
108
109 #define KMX61_CHIP_ID 0x12
110
111 /* KMX61 devices */
112 #define KMX61_ACC 0x01
113 #define KMX61_MAG 0x02
114
115 struct kmx61_data {
116 struct i2c_client *client;
117
118 /* serialize access to non-atomic ops, e.g set_mode */
119 struct mutex lock;
120
121 /* standby state */
122 bool acc_stby;
123 bool mag_stby;
124
125 /* power state */
126 bool acc_ps;
127 bool mag_ps;
128
129 /* config bits */
130 u8 range;
131 u8 odr_bits;
132 u8 wake_thresh;
133 u8 wake_duration;
134
135 /* accelerometer specific data */
136 struct iio_dev *acc_indio_dev;
137 struct iio_trigger *acc_dready_trig;
138 struct iio_trigger *motion_trig;
139 bool acc_dready_trig_on;
140 bool motion_trig_on;
141 bool ev_enable_state;
142
143 /* magnetometer specific data */
144 struct iio_dev *mag_indio_dev;
145 struct iio_trigger *mag_dready_trig;
146 bool mag_dready_trig_on;
147 };
148
149 enum kmx61_range {
150 KMX61_RANGE_2G,
151 KMX61_RANGE_4G,
152 KMX61_RANGE_8G,
153 };
154
155 enum kmx61_axis {
156 KMX61_AXIS_X,
157 KMX61_AXIS_Y,
158 KMX61_AXIS_Z,
159 };
160
161 static const u16 kmx61_uscale_table[] = {9582, 19163, 38326};
162
163 static const struct {
164 int val;
165 int val2;
166 } kmx61_samp_freq_table[] = { {12, 500000},
167 {25, 0},
168 {50, 0},
169 {100, 0},
170 {200, 0},
171 {400, 0},
172 {800, 0},
173 {1600, 0},
174 {0, 781000},
175 {1, 563000},
176 {3, 125000},
177 {6, 250000} };
178
179 static const struct {
180 int val;
181 int val2;
182 int odr_bits;
183 } kmx61_wake_up_odr_table[] = { {0, 781000, 0x00},
184 {1, 563000, 0x01},
185 {3, 125000, 0x02},
186 {6, 250000, 0x03},
187 {12, 500000, 0x04},
188 {25, 0, 0x05},
189 {50, 0, 0x06},
190 {100, 0, 0x06},
191 {200, 0, 0x06},
192 {400, 0, 0x06},
193 {800, 0, 0x06},
194 {1600, 0, 0x06} };
195
196 static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326");
197 static IIO_CONST_ATTR(magn_scale_available, "0.001465");
198 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
199 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800");
200
201 static struct attribute *kmx61_acc_attributes[] = {
202 &iio_const_attr_accel_scale_available.dev_attr.attr,
203 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
204 NULL,
205 };
206
207 static struct attribute *kmx61_mag_attributes[] = {
208 &iio_const_attr_magn_scale_available.dev_attr.attr,
209 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
210 NULL,
211 };
212
213 static const struct attribute_group kmx61_acc_attribute_group = {
214 .attrs = kmx61_acc_attributes,
215 };
216
217 static const struct attribute_group kmx61_mag_attribute_group = {
218 .attrs = kmx61_mag_attributes,
219 };
220
221 static const struct iio_event_spec kmx61_event = {
222 .type = IIO_EV_TYPE_THRESH,
223 .dir = IIO_EV_DIR_EITHER,
224 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
225 BIT(IIO_EV_INFO_ENABLE) |
226 BIT(IIO_EV_INFO_PERIOD),
227 };
228
229 #define KMX61_ACC_CHAN(_axis) { \
230 .type = IIO_ACCEL, \
231 .modified = 1, \
232 .channel2 = IIO_MOD_ ## _axis, \
233 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
234 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
235 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
236 .address = KMX61_ACC, \
237 .scan_index = KMX61_AXIS_ ## _axis, \
238 .scan_type = { \
239 .sign = 's', \
240 .realbits = 12, \
241 .storagebits = 16, \
242 .shift = 4, \
243 .endianness = IIO_LE, \
244 }, \
245 .event_spec = &kmx61_event, \
246 .num_event_specs = 1 \
247 }
248
249 #define KMX61_MAG_CHAN(_axis) { \
250 .type = IIO_MAGN, \
251 .modified = 1, \
252 .channel2 = IIO_MOD_ ## _axis, \
253 .address = KMX61_MAG, \
254 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
255 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
256 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
257 .scan_index = KMX61_AXIS_ ## _axis, \
258 .scan_type = { \
259 .sign = 's', \
260 .realbits = 14, \
261 .storagebits = 16, \
262 .shift = 2, \
263 .endianness = IIO_LE, \
264 }, \
265 }
266
267 static const struct iio_chan_spec kmx61_acc_channels[] = {
268 KMX61_ACC_CHAN(X),
269 KMX61_ACC_CHAN(Y),
270 KMX61_ACC_CHAN(Z),
271 };
272
273 static const struct iio_chan_spec kmx61_mag_channels[] = {
274 KMX61_MAG_CHAN(X),
275 KMX61_MAG_CHAN(Y),
276 KMX61_MAG_CHAN(Z),
277 };
278
279 static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data)
280 {
281 struct kmx61_data **priv = iio_priv(indio_dev);
282
283 *priv = data;
284 }
285
286 static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev)
287 {
288 return *(struct kmx61_data **)iio_priv(indio_dev);
289 }
290
291 static int kmx61_convert_freq_to_bit(int val, int val2)
292 {
293 int i;
294
295 for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++)
296 if (val == kmx61_samp_freq_table[i].val &&
297 val2 == kmx61_samp_freq_table[i].val2)
298 return i;
299 return -EINVAL;
300 }
301
302 static int kmx61_convert_wake_up_odr_to_bit(int val, int val2)
303 {
304 int i;
305
306 for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i)
307 if (kmx61_wake_up_odr_table[i].val == val &&
308 kmx61_wake_up_odr_table[i].val2 == val2)
309 return kmx61_wake_up_odr_table[i].odr_bits;
310 return -EINVAL;
311 }
312
313 /**
314 * kmx61_set_mode() - set KMX61 device operating mode
315 * @data - kmx61 device private data pointer
316 * @mode - bitmask, indicating operating mode for @device
317 * @device - bitmask, indicating device for which @mode needs to be set
318 * @update - update stby bits stored in device's private @data
319 *
320 * For each sensor (accelerometer/magnetometer) there are two operating modes
321 * STANDBY and OPERATION. Neither accel nor magn can be disabled independently
322 * if they are both enabled. Internal sensors state is saved in acc_stby and
323 * mag_stby members of driver's private @data.
324 */
325 static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device,
326 bool update)
327 {
328 int ret;
329 int acc_stby = -1, mag_stby = -1;
330
331 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
332 if (ret < 0) {
333 dev_err(&data->client->dev, "Error reading reg_stby\n");
334 return ret;
335 }
336 if (device & KMX61_ACC) {
337 if (mode & KMX61_ACC_STBY_BIT) {
338 ret |= KMX61_ACC_STBY_BIT;
339 acc_stby = 1;
340 } else {
341 ret &= ~KMX61_ACC_STBY_BIT;
342 acc_stby = 0;
343 }
344 }
345
346 if (device & KMX61_MAG) {
347 if (mode & KMX61_MAG_STBY_BIT) {
348 ret |= KMX61_MAG_STBY_BIT;
349 mag_stby = 1;
350 } else {
351 ret &= ~KMX61_MAG_STBY_BIT;
352 mag_stby = 0;
353 }
354 }
355
356 if (mode & KMX61_ACT_STBY_BIT)
357 ret |= KMX61_ACT_STBY_BIT;
358
359 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret);
360 if (ret < 0) {
361 dev_err(&data->client->dev, "Error writing reg_stby\n");
362 return ret;
363 }
364
365 if (acc_stby != -1 && update)
366 data->acc_stby = acc_stby;
367 if (mag_stby != -1 && update)
368 data->mag_stby = mag_stby;
369
370 return 0;
371 }
372
373 static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
374 {
375 int ret;
376
377 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
378 if (ret < 0) {
379 dev_err(&data->client->dev, "Error reading reg_stby\n");
380 return ret;
381 }
382 *mode = 0;
383
384 if (device & KMX61_ACC) {
385 if (ret & KMX61_ACC_STBY_BIT)
386 *mode |= KMX61_ACC_STBY_BIT;
387 else
388 *mode &= ~KMX61_ACC_STBY_BIT;
389 }
390
391 if (device & KMX61_MAG) {
392 if (ret & KMX61_MAG_STBY_BIT)
393 *mode |= KMX61_MAG_STBY_BIT;
394 else
395 *mode &= ~KMX61_MAG_STBY_BIT;
396 }
397
398 return 0;
399 }
400
401 static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
402 {
403 int ret, odr_bits;
404
405 odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2);
406 if (odr_bits < 0)
407 return odr_bits;
408
409 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2,
410 odr_bits);
411 if (ret < 0)
412 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
413 return ret;
414 }
415
416 static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
417 {
418 int ret;
419 u8 mode;
420 int lodr_bits, odr_bits;
421
422 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
423 if (ret < 0)
424 return ret;
425
426 lodr_bits = kmx61_convert_freq_to_bit(val, val2);
427 if (lodr_bits < 0)
428 return lodr_bits;
429
430 /* To change ODR, accel and magn must be in STDBY */
431 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
432 true);
433 if (ret < 0)
434 return ret;
435
436 odr_bits = 0;
437 if (device & KMX61_ACC)
438 odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT;
439 if (device & KMX61_MAG)
440 odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT;
441
442 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL,
443 odr_bits);
444 if (ret < 0)
445 return ret;
446
447 data->odr_bits = odr_bits;
448
449 if (device & KMX61_ACC) {
450 ret = kmx61_set_wake_up_odr(data, val, val2);
451 if (ret)
452 return ret;
453 }
454
455 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
456 }
457
458 static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2,
459 u8 device)
460 {
461 u8 lodr_bits;
462
463 if (device & KMX61_ACC)
464 lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) &
465 KMX61_ACC_ODR_MASK;
466 else if (device & KMX61_MAG)
467 lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) &
468 KMX61_MAG_ODR_MASK;
469 else
470 return -EINVAL;
471
472 if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table))
473 return -EINVAL;
474
475 *val = kmx61_samp_freq_table[lodr_bits].val;
476 *val2 = kmx61_samp_freq_table[lodr_bits].val2;
477
478 return 0;
479 }
480
481 static int kmx61_set_range(struct kmx61_data *data, u8 range)
482 {
483 int ret;
484
485 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
486 if (ret < 0) {
487 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
488 return ret;
489 }
490
491 ret &= ~KMX61_REG_CTRL1_GSEL_MASK;
492 ret |= range & KMX61_REG_CTRL1_GSEL_MASK;
493
494 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
495 if (ret < 0) {
496 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
497 return ret;
498 }
499
500 data->range = range;
501
502 return 0;
503 }
504
505 static int kmx61_set_scale(struct kmx61_data *data, u16 uscale)
506 {
507 int ret, i;
508 u8 mode;
509
510 for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) {
511 if (kmx61_uscale_table[i] == uscale) {
512 ret = kmx61_get_mode(data, &mode,
513 KMX61_ACC | KMX61_MAG);
514 if (ret < 0)
515 return ret;
516
517 ret = kmx61_set_mode(data, KMX61_ALL_STBY,
518 KMX61_ACC | KMX61_MAG, true);
519 if (ret < 0)
520 return ret;
521
522 ret = kmx61_set_range(data, i);
523 if (ret < 0)
524 return ret;
525
526 return kmx61_set_mode(data, mode,
527 KMX61_ACC | KMX61_MAG, true);
528 }
529 }
530 return -EINVAL;
531 }
532
533 static int kmx61_chip_init(struct kmx61_data *data)
534 {
535 int ret, val, val2;
536
537 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I);
538 if (ret < 0) {
539 dev_err(&data->client->dev, "Error reading who_am_i\n");
540 return ret;
541 }
542
543 if (ret != KMX61_CHIP_ID) {
544 dev_err(&data->client->dev,
545 "Wrong chip id, got %x expected %x\n",
546 ret, KMX61_CHIP_ID);
547 return -EINVAL;
548 }
549
550 /* set accel 12bit, 4g range */
551 ret = kmx61_set_range(data, KMX61_RANGE_4G);
552 if (ret < 0)
553 return ret;
554
555 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL);
556 if (ret < 0) {
557 dev_err(&data->client->dev, "Error reading reg_odcntl\n");
558 return ret;
559 }
560 data->odr_bits = ret;
561
562 /*
563 * set output data rate for wake up (motion detection) function
564 * to match data rate for accelerometer sampling
565 */
566 ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC);
567 if (ret < 0)
568 return ret;
569
570 ret = kmx61_set_wake_up_odr(data, val, val2);
571 if (ret < 0)
572 return ret;
573
574 /* set acc/magn to OPERATION mode */
575 ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true);
576 if (ret < 0)
577 return ret;
578
579 data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH;
580 data->wake_duration = KMX61_DEFAULT_WAKE_DURATION;
581
582 return 0;
583 }
584
585 static int kmx61_setup_new_data_interrupt(struct kmx61_data *data,
586 bool status, u8 device)
587 {
588 u8 mode;
589 int ret;
590
591 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
592 if (ret < 0)
593 return ret;
594
595 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
596 if (ret < 0)
597 return ret;
598
599 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
600 if (ret < 0) {
601 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
602 return ret;
603 }
604
605 if (status) {
606 ret |= KMX61_REG_INC1_BIT_IEN;
607 if (device & KMX61_ACC)
608 ret |= KMX61_REG_INC1_BIT_DRDYA;
609 if (device & KMX61_MAG)
610 ret |= KMX61_REG_INC1_BIT_DRDYM;
611 } else {
612 ret &= ~KMX61_REG_INC1_BIT_IEN;
613 if (device & KMX61_ACC)
614 ret &= ~KMX61_REG_INC1_BIT_DRDYA;
615 if (device & KMX61_MAG)
616 ret &= ~KMX61_REG_INC1_BIT_DRDYM;
617 }
618 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
619 if (ret < 0) {
620 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
621 return ret;
622 }
623
624 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
625 if (ret < 0) {
626 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
627 return ret;
628 }
629
630 if (status)
631 ret |= KMX61_REG_CTRL1_BIT_DRDYE;
632 else
633 ret &= ~KMX61_REG_CTRL1_BIT_DRDYE;
634
635 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
636 if (ret < 0) {
637 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
638 return ret;
639 }
640
641 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
642 }
643
644 static int kmx61_chip_update_thresholds(struct kmx61_data *data)
645 {
646 int ret;
647
648 ret = i2c_smbus_write_byte_data(data->client,
649 KMX61_REG_WUF_TIMER,
650 data->wake_duration);
651 if (ret < 0) {
652 dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n");
653 return ret;
654 }
655
656 ret = i2c_smbus_write_byte_data(data->client,
657 KMX61_REG_WUF_THRESH,
658 data->wake_thresh);
659 if (ret < 0)
660 dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n");
661
662 return ret;
663 }
664
665 static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data,
666 bool status)
667 {
668 u8 mode;
669 int ret;
670
671 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
672 if (ret < 0)
673 return ret;
674
675 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
676 if (ret < 0)
677 return ret;
678
679 ret = kmx61_chip_update_thresholds(data);
680 if (ret < 0)
681 return ret;
682
683 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
684 if (ret < 0) {
685 dev_err(&data->client->dev, "Error reading reg_inc1\n");
686 return ret;
687 }
688 if (status)
689 ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
690 else
691 ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
692
693 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
694 if (ret < 0) {
695 dev_err(&data->client->dev, "Error writing reg_inc1\n");
696 return ret;
697 }
698
699 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
700 if (ret < 0) {
701 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
702 return ret;
703 }
704
705 if (status)
706 ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE;
707 else
708 ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE);
709
710 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
711 if (ret < 0) {
712 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
713 return ret;
714 }
715 mode |= KMX61_ACT_STBY_BIT;
716 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
717 }
718
719 /**
720 * kmx61_set_power_state() - set power state for kmx61 @device
721 * @data - kmx61 device private pointer
722 * @on - power state to be set for @device
723 * @device - bitmask indicating device for which @on state needs to be set
724 *
725 * Notice that when ACC power state needs to be set to ON and MAG is in
726 * OPERATION then we know that kmx61_runtime_resume was already called
727 * so we must set ACC OPERATION mode here. The same happens when MAG power
728 * state needs to be set to ON and ACC is in OPERATION.
729 */
730 static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device)
731 {
732 #ifdef CONFIG_PM
733 int ret;
734
735 if (device & KMX61_ACC) {
736 if (on && !data->acc_ps && !data->mag_stby) {
737 ret = kmx61_set_mode(data, 0, KMX61_ACC, true);
738 if (ret < 0)
739 return ret;
740 }
741 data->acc_ps = on;
742 }
743 if (device & KMX61_MAG) {
744 if (on && !data->mag_ps && !data->acc_stby) {
745 ret = kmx61_set_mode(data, 0, KMX61_MAG, true);
746 if (ret < 0)
747 return ret;
748 }
749 data->mag_ps = on;
750 }
751
752 if (on) {
753 ret = pm_runtime_get_sync(&data->client->dev);
754 } else {
755 pm_runtime_mark_last_busy(&data->client->dev);
756 ret = pm_runtime_put_autosuspend(&data->client->dev);
757 }
758 if (ret < 0) {
759 dev_err(&data->client->dev,
760 "Failed: kmx61_set_power_state for %d, ret %d\n",
761 on, ret);
762 if (on)
763 pm_runtime_put_noidle(&data->client->dev);
764
765 return ret;
766 }
767 #endif
768 return 0;
769 }
770
771 static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset)
772 {
773 int ret;
774 u8 reg = base + offset * 2;
775
776 ret = i2c_smbus_read_word_data(data->client, reg);
777 if (ret < 0)
778 dev_err(&data->client->dev, "failed to read reg at %x\n", reg);
779
780 return ret;
781 }
782
783 static int kmx61_read_raw(struct iio_dev *indio_dev,
784 struct iio_chan_spec const *chan, int *val,
785 int *val2, long mask)
786 {
787 int ret;
788 u8 base_reg;
789 struct kmx61_data *data = kmx61_get_data(indio_dev);
790
791 switch (mask) {
792 case IIO_CHAN_INFO_RAW:
793 switch (chan->type) {
794 case IIO_ACCEL:
795 base_reg = KMX61_ACC_XOUT_L;
796 break;
797 case IIO_MAGN:
798 base_reg = KMX61_MAG_XOUT_L;
799 break;
800 default:
801 return -EINVAL;
802 }
803 mutex_lock(&data->lock);
804
805 ret = kmx61_set_power_state(data, true, chan->address);
806 if (ret) {
807 mutex_unlock(&data->lock);
808 return ret;
809 }
810
811 ret = kmx61_read_measurement(data, base_reg, chan->scan_index);
812 if (ret < 0) {
813 kmx61_set_power_state(data, false, chan->address);
814 mutex_unlock(&data->lock);
815 return ret;
816 }
817 *val = sign_extend32(ret >> chan->scan_type.shift,
818 chan->scan_type.realbits - 1);
819 ret = kmx61_set_power_state(data, false, chan->address);
820
821 mutex_unlock(&data->lock);
822 if (ret)
823 return ret;
824 return IIO_VAL_INT;
825 case IIO_CHAN_INFO_SCALE:
826 switch (chan->type) {
827 case IIO_ACCEL:
828 *val = 0;
829 *val2 = kmx61_uscale_table[data->range];
830 return IIO_VAL_INT_PLUS_MICRO;
831 case IIO_MAGN:
832 /* 14 bits res, 1465 microGauss per magn count */
833 *val = 0;
834 *val2 = 1465;
835 return IIO_VAL_INT_PLUS_MICRO;
836 default:
837 return -EINVAL;
838 }
839 case IIO_CHAN_INFO_SAMP_FREQ:
840 if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
841 return -EINVAL;
842
843 mutex_lock(&data->lock);
844 ret = kmx61_get_odr(data, val, val2, chan->address);
845 mutex_unlock(&data->lock);
846 if (ret)
847 return -EINVAL;
848 return IIO_VAL_INT_PLUS_MICRO;
849 }
850 return -EINVAL;
851 }
852
853 static int kmx61_write_raw(struct iio_dev *indio_dev,
854 struct iio_chan_spec const *chan, int val,
855 int val2, long mask)
856 {
857 int ret;
858 struct kmx61_data *data = kmx61_get_data(indio_dev);
859
860 switch (mask) {
861 case IIO_CHAN_INFO_SAMP_FREQ:
862 if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
863 return -EINVAL;
864
865 mutex_lock(&data->lock);
866 ret = kmx61_set_odr(data, val, val2, chan->address);
867 mutex_unlock(&data->lock);
868 return ret;
869 case IIO_CHAN_INFO_SCALE:
870 switch (chan->type) {
871 case IIO_ACCEL:
872 if (val != 0)
873 return -EINVAL;
874 mutex_lock(&data->lock);
875 ret = kmx61_set_scale(data, val2);
876 mutex_unlock(&data->lock);
877 return ret;
878 default:
879 return -EINVAL;
880 }
881 default:
882 return -EINVAL;
883 }
884 }
885
886 static int kmx61_read_event(struct iio_dev *indio_dev,
887 const struct iio_chan_spec *chan,
888 enum iio_event_type type,
889 enum iio_event_direction dir,
890 enum iio_event_info info,
891 int *val, int *val2)
892 {
893 struct kmx61_data *data = kmx61_get_data(indio_dev);
894
895 *val2 = 0;
896 switch (info) {
897 case IIO_EV_INFO_VALUE:
898 *val = data->wake_thresh;
899 return IIO_VAL_INT;
900 case IIO_EV_INFO_PERIOD:
901 *val = data->wake_duration;
902 return IIO_VAL_INT;
903 default:
904 return -EINVAL;
905 }
906 }
907
908 static int kmx61_write_event(struct iio_dev *indio_dev,
909 const struct iio_chan_spec *chan,
910 enum iio_event_type type,
911 enum iio_event_direction dir,
912 enum iio_event_info info,
913 int val, int val2)
914 {
915 struct kmx61_data *data = kmx61_get_data(indio_dev);
916
917 if (data->ev_enable_state)
918 return -EBUSY;
919
920 switch (info) {
921 case IIO_EV_INFO_VALUE:
922 data->wake_thresh = val;
923 return IIO_VAL_INT;
924 case IIO_EV_INFO_PERIOD:
925 data->wake_duration = val;
926 return IIO_VAL_INT;
927 default:
928 return -EINVAL;
929 }
930 }
931
932 static int kmx61_read_event_config(struct iio_dev *indio_dev,
933 const struct iio_chan_spec *chan,
934 enum iio_event_type type,
935 enum iio_event_direction dir)
936 {
937 struct kmx61_data *data = kmx61_get_data(indio_dev);
938
939 return data->ev_enable_state;
940 }
941
942 static int kmx61_write_event_config(struct iio_dev *indio_dev,
943 const struct iio_chan_spec *chan,
944 enum iio_event_type type,
945 enum iio_event_direction dir,
946 int state)
947 {
948 struct kmx61_data *data = kmx61_get_data(indio_dev);
949 int ret = 0;
950
951 if (state && data->ev_enable_state)
952 return 0;
953
954 mutex_lock(&data->lock);
955
956 if (!state && data->motion_trig_on) {
957 data->ev_enable_state = false;
958 goto err_unlock;
959 }
960
961 ret = kmx61_set_power_state(data, state, KMX61_ACC);
962 if (ret < 0)
963 goto err_unlock;
964
965 ret = kmx61_setup_any_motion_interrupt(data, state);
966 if (ret < 0) {
967 kmx61_set_power_state(data, false, KMX61_ACC);
968 goto err_unlock;
969 }
970
971 data->ev_enable_state = state;
972
973 err_unlock:
974 mutex_unlock(&data->lock);
975
976 return ret;
977 }
978
979 static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev,
980 struct iio_trigger *trig)
981 {
982 struct kmx61_data *data = kmx61_get_data(indio_dev);
983
984 if (data->acc_dready_trig != trig && data->motion_trig != trig)
985 return -EINVAL;
986
987 return 0;
988 }
989
990 static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev,
991 struct iio_trigger *trig)
992 {
993 struct kmx61_data *data = kmx61_get_data(indio_dev);
994
995 if (data->mag_dready_trig != trig)
996 return -EINVAL;
997
998 return 0;
999 }
1000
1001 static const struct iio_info kmx61_acc_info = {
1002 .read_raw = kmx61_read_raw,
1003 .write_raw = kmx61_write_raw,
1004 .attrs = &kmx61_acc_attribute_group,
1005 .read_event_value = kmx61_read_event,
1006 .write_event_value = kmx61_write_event,
1007 .read_event_config = kmx61_read_event_config,
1008 .write_event_config = kmx61_write_event_config,
1009 .validate_trigger = kmx61_acc_validate_trigger,
1010 };
1011
1012 static const struct iio_info kmx61_mag_info = {
1013 .read_raw = kmx61_read_raw,
1014 .write_raw = kmx61_write_raw,
1015 .attrs = &kmx61_mag_attribute_group,
1016 .validate_trigger = kmx61_mag_validate_trigger,
1017 };
1018
1019
1020 static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
1021 bool state)
1022 {
1023 int ret = 0;
1024 u8 device;
1025
1026 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1027 struct kmx61_data *data = kmx61_get_data(indio_dev);
1028
1029 mutex_lock(&data->lock);
1030
1031 if (!state && data->ev_enable_state && data->motion_trig_on) {
1032 data->motion_trig_on = false;
1033 goto err_unlock;
1034 }
1035
1036 if (data->acc_dready_trig == trig || data->motion_trig == trig)
1037 device = KMX61_ACC;
1038 else
1039 device = KMX61_MAG;
1040
1041 ret = kmx61_set_power_state(data, state, device);
1042 if (ret < 0)
1043 goto err_unlock;
1044
1045 if (data->acc_dready_trig == trig || data->mag_dready_trig == trig)
1046 ret = kmx61_setup_new_data_interrupt(data, state, device);
1047 else
1048 ret = kmx61_setup_any_motion_interrupt(data, state);
1049 if (ret < 0) {
1050 kmx61_set_power_state(data, false, device);
1051 goto err_unlock;
1052 }
1053
1054 if (data->acc_dready_trig == trig)
1055 data->acc_dready_trig_on = state;
1056 else if (data->mag_dready_trig == trig)
1057 data->mag_dready_trig_on = state;
1058 else
1059 data->motion_trig_on = state;
1060 err_unlock:
1061 mutex_unlock(&data->lock);
1062
1063 return ret;
1064 }
1065
1066 static int kmx61_trig_try_reenable(struct iio_trigger *trig)
1067 {
1068 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1069 struct kmx61_data *data = kmx61_get_data(indio_dev);
1070 int ret;
1071
1072 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
1073 if (ret < 0) {
1074 dev_err(&data->client->dev, "Error reading reg_inl\n");
1075 return ret;
1076 }
1077
1078 return 0;
1079 }
1080
1081 static const struct iio_trigger_ops kmx61_trigger_ops = {
1082 .set_trigger_state = kmx61_data_rdy_trigger_set_state,
1083 .try_reenable = kmx61_trig_try_reenable,
1084 };
1085
1086 static irqreturn_t kmx61_event_handler(int irq, void *private)
1087 {
1088 struct kmx61_data *data = private;
1089 struct iio_dev *indio_dev = data->acc_indio_dev;
1090 int ret;
1091
1092 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
1093 if (ret < 0) {
1094 dev_err(&data->client->dev, "Error reading reg_ins1\n");
1095 goto ack_intr;
1096 }
1097
1098 if (ret & KMX61_REG_INS1_BIT_WUFS) {
1099 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
1100 if (ret < 0) {
1101 dev_err(&data->client->dev, "Error reading reg_ins2\n");
1102 goto ack_intr;
1103 }
1104
1105 if (ret & KMX61_REG_INS2_BIT_XN)
1106 iio_push_event(indio_dev,
1107 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1108 0,
1109 IIO_MOD_X,
1110 IIO_EV_TYPE_THRESH,
1111 IIO_EV_DIR_FALLING),
1112 0);
1113
1114 if (ret & KMX61_REG_INS2_BIT_XP)
1115 iio_push_event(indio_dev,
1116 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1117 0,
1118 IIO_MOD_X,
1119 IIO_EV_TYPE_THRESH,
1120 IIO_EV_DIR_RISING),
1121 0);
1122
1123 if (ret & KMX61_REG_INS2_BIT_YN)
1124 iio_push_event(indio_dev,
1125 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1126 0,
1127 IIO_MOD_Y,
1128 IIO_EV_TYPE_THRESH,
1129 IIO_EV_DIR_FALLING),
1130 0);
1131
1132 if (ret & KMX61_REG_INS2_BIT_YP)
1133 iio_push_event(indio_dev,
1134 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1135 0,
1136 IIO_MOD_Y,
1137 IIO_EV_TYPE_THRESH,
1138 IIO_EV_DIR_RISING),
1139 0);
1140
1141 if (ret & KMX61_REG_INS2_BIT_ZN)
1142 iio_push_event(indio_dev,
1143 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1144 0,
1145 IIO_MOD_Z,
1146 IIO_EV_TYPE_THRESH,
1147 IIO_EV_DIR_FALLING),
1148 0);
1149
1150 if (ret & KMX61_REG_INS2_BIT_ZP)
1151 iio_push_event(indio_dev,
1152 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1153 0,
1154 IIO_MOD_Z,
1155 IIO_EV_TYPE_THRESH,
1156 IIO_EV_DIR_RISING),
1157 0);
1158 }
1159
1160 ack_intr:
1161 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
1162 if (ret < 0)
1163 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
1164
1165 ret |= KMX61_REG_CTRL1_BIT_RES;
1166 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
1167 if (ret < 0)
1168 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
1169
1170 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
1171 if (ret < 0)
1172 dev_err(&data->client->dev, "Error reading reg_inl\n");
1173
1174 return IRQ_HANDLED;
1175 }
1176
1177 static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
1178 {
1179 struct kmx61_data *data = private;
1180
1181 if (data->acc_dready_trig_on)
1182 iio_trigger_poll(data->acc_dready_trig);
1183 if (data->mag_dready_trig_on)
1184 iio_trigger_poll(data->mag_dready_trig);
1185
1186 if (data->motion_trig_on)
1187 iio_trigger_poll(data->motion_trig);
1188
1189 if (data->ev_enable_state)
1190 return IRQ_WAKE_THREAD;
1191 return IRQ_HANDLED;
1192 }
1193
1194 static irqreturn_t kmx61_trigger_handler(int irq, void *p)
1195 {
1196 struct iio_poll_func *pf = p;
1197 struct iio_dev *indio_dev = pf->indio_dev;
1198 struct kmx61_data *data = kmx61_get_data(indio_dev);
1199 int bit, ret, i = 0;
1200 u8 base;
1201 s16 buffer[8];
1202
1203 if (indio_dev == data->acc_indio_dev)
1204 base = KMX61_ACC_XOUT_L;
1205 else
1206 base = KMX61_MAG_XOUT_L;
1207
1208 mutex_lock(&data->lock);
1209 for_each_set_bit(bit, indio_dev->active_scan_mask,
1210 indio_dev->masklength) {
1211 ret = kmx61_read_measurement(data, base, bit);
1212 if (ret < 0) {
1213 mutex_unlock(&data->lock);
1214 goto err;
1215 }
1216 buffer[i++] = ret;
1217 }
1218 mutex_unlock(&data->lock);
1219
1220 iio_push_to_buffers(indio_dev, buffer);
1221 err:
1222 iio_trigger_notify_done(indio_dev->trig);
1223
1224 return IRQ_HANDLED;
1225 }
1226
1227 static const char *kmx61_match_acpi_device(struct device *dev)
1228 {
1229 const struct acpi_device_id *id;
1230
1231 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1232 if (!id)
1233 return NULL;
1234 return dev_name(dev);
1235 }
1236
1237 static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
1238 const struct iio_info *info,
1239 const struct iio_chan_spec *chan,
1240 int num_channels,
1241 const char *name)
1242 {
1243 struct iio_dev *indio_dev;
1244
1245 indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data));
1246 if (!indio_dev)
1247 return ERR_PTR(-ENOMEM);
1248
1249 kmx61_set_data(indio_dev, data);
1250
1251 indio_dev->dev.parent = &data->client->dev;
1252 indio_dev->channels = chan;
1253 indio_dev->num_channels = num_channels;
1254 indio_dev->name = name;
1255 indio_dev->modes = INDIO_DIRECT_MODE;
1256 indio_dev->info = info;
1257
1258 return indio_dev;
1259 }
1260
1261 static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
1262 struct iio_dev *indio_dev,
1263 const char *tag)
1264 {
1265 struct iio_trigger *trig;
1266 int ret;
1267
1268 trig = devm_iio_trigger_alloc(&data->client->dev,
1269 "%s-%s-dev%d",
1270 indio_dev->name,
1271 tag,
1272 indio_dev->id);
1273 if (!trig)
1274 return ERR_PTR(-ENOMEM);
1275
1276 trig->dev.parent = &data->client->dev;
1277 trig->ops = &kmx61_trigger_ops;
1278 iio_trigger_set_drvdata(trig, indio_dev);
1279
1280 ret = iio_trigger_register(trig);
1281 if (ret)
1282 return ERR_PTR(ret);
1283
1284 return trig;
1285 }
1286
1287 static int kmx61_probe(struct i2c_client *client,
1288 const struct i2c_device_id *id)
1289 {
1290 int ret;
1291 struct kmx61_data *data;
1292 const char *name = NULL;
1293
1294 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1295 if (!data)
1296 return -ENOMEM;
1297
1298 i2c_set_clientdata(client, data);
1299 data->client = client;
1300
1301 mutex_init(&data->lock);
1302
1303 if (id)
1304 name = id->name;
1305 else if (ACPI_HANDLE(&client->dev))
1306 name = kmx61_match_acpi_device(&client->dev);
1307 else
1308 return -ENODEV;
1309
1310 data->acc_indio_dev =
1311 kmx61_indiodev_setup(data, &kmx61_acc_info,
1312 kmx61_acc_channels,
1313 ARRAY_SIZE(kmx61_acc_channels),
1314 name);
1315 if (IS_ERR(data->acc_indio_dev))
1316 return PTR_ERR(data->acc_indio_dev);
1317
1318 data->mag_indio_dev =
1319 kmx61_indiodev_setup(data, &kmx61_mag_info,
1320 kmx61_mag_channels,
1321 ARRAY_SIZE(kmx61_mag_channels),
1322 name);
1323 if (IS_ERR(data->mag_indio_dev))
1324 return PTR_ERR(data->mag_indio_dev);
1325
1326 ret = kmx61_chip_init(data);
1327 if (ret < 0)
1328 return ret;
1329
1330 if (client->irq > 0) {
1331 ret = devm_request_threaded_irq(&client->dev, client->irq,
1332 kmx61_data_rdy_trig_poll,
1333 kmx61_event_handler,
1334 IRQF_TRIGGER_RISING,
1335 KMX61_IRQ_NAME,
1336 data);
1337 if (ret)
1338 goto err_chip_uninit;
1339
1340 data->acc_dready_trig =
1341 kmx61_trigger_setup(data, data->acc_indio_dev,
1342 "dready");
1343 if (IS_ERR(data->acc_dready_trig)) {
1344 ret = PTR_ERR(data->acc_dready_trig);
1345 goto err_chip_uninit;
1346 }
1347
1348 data->mag_dready_trig =
1349 kmx61_trigger_setup(data, data->mag_indio_dev,
1350 "dready");
1351 if (IS_ERR(data->mag_dready_trig)) {
1352 ret = PTR_ERR(data->mag_dready_trig);
1353 goto err_trigger_unregister_acc_dready;
1354 }
1355
1356 data->motion_trig =
1357 kmx61_trigger_setup(data, data->acc_indio_dev,
1358 "any-motion");
1359 if (IS_ERR(data->motion_trig)) {
1360 ret = PTR_ERR(data->motion_trig);
1361 goto err_trigger_unregister_mag_dready;
1362 }
1363
1364 ret = iio_triggered_buffer_setup(data->acc_indio_dev,
1365 &iio_pollfunc_store_time,
1366 kmx61_trigger_handler,
1367 NULL);
1368 if (ret < 0) {
1369 dev_err(&data->client->dev,
1370 "Failed to setup acc triggered buffer\n");
1371 goto err_trigger_unregister_motion;
1372 }
1373
1374 ret = iio_triggered_buffer_setup(data->mag_indio_dev,
1375 &iio_pollfunc_store_time,
1376 kmx61_trigger_handler,
1377 NULL);
1378 if (ret < 0) {
1379 dev_err(&data->client->dev,
1380 "Failed to setup mag triggered buffer\n");
1381 goto err_buffer_cleanup_acc;
1382 }
1383 }
1384
1385 ret = pm_runtime_set_active(&client->dev);
1386 if (ret < 0)
1387 goto err_buffer_cleanup_mag;
1388
1389 pm_runtime_enable(&client->dev);
1390 pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS);
1391 pm_runtime_use_autosuspend(&client->dev);
1392
1393 ret = iio_device_register(data->acc_indio_dev);
1394 if (ret < 0) {
1395 dev_err(&client->dev, "Failed to register acc iio device\n");
1396 goto err_buffer_cleanup_mag;
1397 }
1398
1399 ret = iio_device_register(data->mag_indio_dev);
1400 if (ret < 0) {
1401 dev_err(&client->dev, "Failed to register mag iio device\n");
1402 goto err_iio_unregister_acc;
1403 }
1404
1405 return 0;
1406
1407 err_iio_unregister_acc:
1408 iio_device_unregister(data->acc_indio_dev);
1409 err_buffer_cleanup_mag:
1410 if (client->irq > 0)
1411 iio_triggered_buffer_cleanup(data->mag_indio_dev);
1412 err_buffer_cleanup_acc:
1413 if (client->irq > 0)
1414 iio_triggered_buffer_cleanup(data->acc_indio_dev);
1415 err_trigger_unregister_motion:
1416 iio_trigger_unregister(data->motion_trig);
1417 err_trigger_unregister_mag_dready:
1418 iio_trigger_unregister(data->mag_dready_trig);
1419 err_trigger_unregister_acc_dready:
1420 iio_trigger_unregister(data->acc_dready_trig);
1421 err_chip_uninit:
1422 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1423 return ret;
1424 }
1425
1426 static int kmx61_remove(struct i2c_client *client)
1427 {
1428 struct kmx61_data *data = i2c_get_clientdata(client);
1429
1430 iio_device_unregister(data->acc_indio_dev);
1431 iio_device_unregister(data->mag_indio_dev);
1432
1433 pm_runtime_disable(&client->dev);
1434 pm_runtime_set_suspended(&client->dev);
1435 pm_runtime_put_noidle(&client->dev);
1436
1437 if (client->irq > 0) {
1438 iio_triggered_buffer_cleanup(data->acc_indio_dev);
1439 iio_triggered_buffer_cleanup(data->mag_indio_dev);
1440 iio_trigger_unregister(data->acc_dready_trig);
1441 iio_trigger_unregister(data->mag_dready_trig);
1442 iio_trigger_unregister(data->motion_trig);
1443 }
1444
1445 mutex_lock(&data->lock);
1446 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1447 mutex_unlock(&data->lock);
1448
1449 return 0;
1450 }
1451
1452 #ifdef CONFIG_PM_SLEEP
1453 static int kmx61_suspend(struct device *dev)
1454 {
1455 int ret;
1456 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1457
1458 mutex_lock(&data->lock);
1459 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
1460 false);
1461 mutex_unlock(&data->lock);
1462
1463 return ret;
1464 }
1465
1466 static int kmx61_resume(struct device *dev)
1467 {
1468 u8 stby = 0;
1469 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1470
1471 if (data->acc_stby)
1472 stby |= KMX61_ACC_STBY_BIT;
1473 if (data->mag_stby)
1474 stby |= KMX61_MAG_STBY_BIT;
1475
1476 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
1477 }
1478 #endif
1479
1480 #ifdef CONFIG_PM
1481 static int kmx61_runtime_suspend(struct device *dev)
1482 {
1483 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1484 int ret;
1485
1486 mutex_lock(&data->lock);
1487 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1488 mutex_unlock(&data->lock);
1489
1490 return ret;
1491 }
1492
1493 static int kmx61_runtime_resume(struct device *dev)
1494 {
1495 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1496 u8 stby = 0;
1497
1498 if (!data->acc_ps)
1499 stby |= KMX61_ACC_STBY_BIT;
1500 if (!data->mag_ps)
1501 stby |= KMX61_MAG_STBY_BIT;
1502
1503 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
1504 }
1505 #endif
1506
1507 static const struct dev_pm_ops kmx61_pm_ops = {
1508 SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
1509 SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
1510 };
1511
1512 static const struct acpi_device_id kmx61_acpi_match[] = {
1513 {"KMX61021", 0},
1514 {}
1515 };
1516
1517 MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);
1518
1519 static const struct i2c_device_id kmx61_id[] = {
1520 {"kmx611021", 0},
1521 {}
1522 };
1523
1524 MODULE_DEVICE_TABLE(i2c, kmx61_id);
1525
1526 static struct i2c_driver kmx61_driver = {
1527 .driver = {
1528 .name = KMX61_DRV_NAME,
1529 .acpi_match_table = ACPI_PTR(kmx61_acpi_match),
1530 .pm = &kmx61_pm_ops,
1531 },
1532 .probe = kmx61_probe,
1533 .remove = kmx61_remove,
1534 .id_table = kmx61_id,
1535 };
1536
1537 module_i2c_driver(kmx61_driver);
1538
1539 MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
1540 MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver");
1541 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support