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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / iio / imu / kmx61.c
blob4377047d503abe7c2d7df0c35c02606a0c7e283d
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 void kmx61_trig_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 }
1076
1077 static const struct iio_trigger_ops kmx61_trigger_ops = {
1078 .set_trigger_state = kmx61_data_rdy_trigger_set_state,
1079 .reenable = kmx61_trig_reenable,
1080 };
1081
1082 static irqreturn_t kmx61_event_handler(int irq, void *private)
1083 {
1084 struct kmx61_data *data = private;
1085 struct iio_dev *indio_dev = data->acc_indio_dev;
1086 int ret;
1087
1088 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
1089 if (ret < 0) {
1090 dev_err(&data->client->dev, "Error reading reg_ins1\n");
1091 goto ack_intr;
1092 }
1093
1094 if (ret & KMX61_REG_INS1_BIT_WUFS) {
1095 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
1096 if (ret < 0) {
1097 dev_err(&data->client->dev, "Error reading reg_ins2\n");
1098 goto ack_intr;
1099 }
1100
1101 if (ret & KMX61_REG_INS2_BIT_XN)
1102 iio_push_event(indio_dev,
1103 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1104 0,
1105 IIO_MOD_X,
1106 IIO_EV_TYPE_THRESH,
1107 IIO_EV_DIR_FALLING),
1108 0);
1109
1110 if (ret & KMX61_REG_INS2_BIT_XP)
1111 iio_push_event(indio_dev,
1112 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1113 0,
1114 IIO_MOD_X,
1115 IIO_EV_TYPE_THRESH,
1116 IIO_EV_DIR_RISING),
1117 0);
1118
1119 if (ret & KMX61_REG_INS2_BIT_YN)
1120 iio_push_event(indio_dev,
1121 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1122 0,
1123 IIO_MOD_Y,
1124 IIO_EV_TYPE_THRESH,
1125 IIO_EV_DIR_FALLING),
1126 0);
1127
1128 if (ret & KMX61_REG_INS2_BIT_YP)
1129 iio_push_event(indio_dev,
1130 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1131 0,
1132 IIO_MOD_Y,
1133 IIO_EV_TYPE_THRESH,
1134 IIO_EV_DIR_RISING),
1135 0);
1136
1137 if (ret & KMX61_REG_INS2_BIT_ZN)
1138 iio_push_event(indio_dev,
1139 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1140 0,
1141 IIO_MOD_Z,
1142 IIO_EV_TYPE_THRESH,
1143 IIO_EV_DIR_FALLING),
1144 0);
1145
1146 if (ret & KMX61_REG_INS2_BIT_ZP)
1147 iio_push_event(indio_dev,
1148 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1149 0,
1150 IIO_MOD_Z,
1151 IIO_EV_TYPE_THRESH,
1152 IIO_EV_DIR_RISING),
1153 0);
1154 }
1155
1156 ack_intr:
1157 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
1158 if (ret < 0)
1159 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
1160
1161 ret |= KMX61_REG_CTRL1_BIT_RES;
1162 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
1163 if (ret < 0)
1164 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
1165
1166 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
1167 if (ret < 0)
1168 dev_err(&data->client->dev, "Error reading reg_inl\n");
1169
1170 return IRQ_HANDLED;
1171 }
1172
1173 static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
1174 {
1175 struct kmx61_data *data = private;
1176
1177 if (data->acc_dready_trig_on)
1178 iio_trigger_poll(data->acc_dready_trig);
1179 if (data->mag_dready_trig_on)
1180 iio_trigger_poll(data->mag_dready_trig);
1181
1182 if (data->motion_trig_on)
1183 iio_trigger_poll(data->motion_trig);
1184
1185 if (data->ev_enable_state)
1186 return IRQ_WAKE_THREAD;
1187 return IRQ_HANDLED;
1188 }
1189
1190 static irqreturn_t kmx61_trigger_handler(int irq, void *p)
1191 {
1192 struct iio_poll_func *pf = p;
1193 struct iio_dev *indio_dev = pf->indio_dev;
1194 struct kmx61_data *data = kmx61_get_data(indio_dev);
1195 int bit, ret, i = 0;
1196 u8 base;
1197 s16 buffer[8];
1198
1199 if (indio_dev == data->acc_indio_dev)
1200 base = KMX61_ACC_XOUT_L;
1201 else
1202 base = KMX61_MAG_XOUT_L;
1203
1204 mutex_lock(&data->lock);
1205 for_each_set_bit(bit, indio_dev->active_scan_mask,
1206 indio_dev->masklength) {
1207 ret = kmx61_read_measurement(data, base, bit);
1208 if (ret < 0) {
1209 mutex_unlock(&data->lock);
1210 goto err;
1211 }
1212 buffer[i++] = ret;
1213 }
1214 mutex_unlock(&data->lock);
1215
1216 iio_push_to_buffers(indio_dev, buffer);
1217 err:
1218 iio_trigger_notify_done(indio_dev->trig);
1219
1220 return IRQ_HANDLED;
1221 }
1222
1223 static const char *kmx61_match_acpi_device(struct device *dev)
1224 {
1225 const struct acpi_device_id *id;
1226
1227 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1228 if (!id)
1229 return NULL;
1230 return dev_name(dev);
1231 }
1232
1233 static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
1234 const struct iio_info *info,
1235 const struct iio_chan_spec *chan,
1236 int num_channels,
1237 const char *name)
1238 {
1239 struct iio_dev *indio_dev;
1240
1241 indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data));
1242 if (!indio_dev)
1243 return ERR_PTR(-ENOMEM);
1244
1245 kmx61_set_data(indio_dev, data);
1246
1247 indio_dev->channels = chan;
1248 indio_dev->num_channels = num_channels;
1249 indio_dev->name = name;
1250 indio_dev->modes = INDIO_DIRECT_MODE;
1251 indio_dev->info = info;
1252
1253 return indio_dev;
1254 }
1255
1256 static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
1257 struct iio_dev *indio_dev,
1258 const char *tag)
1259 {
1260 struct iio_trigger *trig;
1261 int ret;
1262
1263 trig = devm_iio_trigger_alloc(&data->client->dev,
1264 "%s-%s-dev%d",
1265 indio_dev->name,
1266 tag,
1267 indio_dev->id);
1268 if (!trig)
1269 return ERR_PTR(-ENOMEM);
1270
1271 trig->dev.parent = &data->client->dev;
1272 trig->ops = &kmx61_trigger_ops;
1273 iio_trigger_set_drvdata(trig, indio_dev);
1274
1275 ret = iio_trigger_register(trig);
1276 if (ret)
1277 return ERR_PTR(ret);
1278
1279 return trig;
1280 }
1281
1282 static int kmx61_probe(struct i2c_client *client,
1283 const struct i2c_device_id *id)
1284 {
1285 int ret;
1286 struct kmx61_data *data;
1287 const char *name = NULL;
1288
1289 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1290 if (!data)
1291 return -ENOMEM;
1292
1293 i2c_set_clientdata(client, data);
1294 data->client = client;
1295
1296 mutex_init(&data->lock);
1297
1298 if (id)
1299 name = id->name;
1300 else if (ACPI_HANDLE(&client->dev))
1301 name = kmx61_match_acpi_device(&client->dev);
1302 else
1303 return -ENODEV;
1304
1305 data->acc_indio_dev =
1306 kmx61_indiodev_setup(data, &kmx61_acc_info,
1307 kmx61_acc_channels,
1308 ARRAY_SIZE(kmx61_acc_channels),
1309 name);
1310 if (IS_ERR(data->acc_indio_dev))
1311 return PTR_ERR(data->acc_indio_dev);
1312
1313 data->mag_indio_dev =
1314 kmx61_indiodev_setup(data, &kmx61_mag_info,
1315 kmx61_mag_channels,
1316 ARRAY_SIZE(kmx61_mag_channels),
1317 name);
1318 if (IS_ERR(data->mag_indio_dev))
1319 return PTR_ERR(data->mag_indio_dev);
1320
1321 ret = kmx61_chip_init(data);
1322 if (ret < 0)
1323 return ret;
1324
1325 if (client->irq > 0) {
1326 ret = devm_request_threaded_irq(&client->dev, client->irq,
1327 kmx61_data_rdy_trig_poll,
1328 kmx61_event_handler,
1329 IRQF_TRIGGER_RISING,
1330 KMX61_IRQ_NAME,
1331 data);
1332 if (ret)
1333 goto err_chip_uninit;
1334
1335 data->acc_dready_trig =
1336 kmx61_trigger_setup(data, data->acc_indio_dev,
1337 "dready");
1338 if (IS_ERR(data->acc_dready_trig)) {
1339 ret = PTR_ERR(data->acc_dready_trig);
1340 goto err_chip_uninit;
1341 }
1342
1343 data->mag_dready_trig =
1344 kmx61_trigger_setup(data, data->mag_indio_dev,
1345 "dready");
1346 if (IS_ERR(data->mag_dready_trig)) {
1347 ret = PTR_ERR(data->mag_dready_trig);
1348 goto err_trigger_unregister_acc_dready;
1349 }
1350
1351 data->motion_trig =
1352 kmx61_trigger_setup(data, data->acc_indio_dev,
1353 "any-motion");
1354 if (IS_ERR(data->motion_trig)) {
1355 ret = PTR_ERR(data->motion_trig);
1356 goto err_trigger_unregister_mag_dready;
1357 }
1358
1359 ret = iio_triggered_buffer_setup(data->acc_indio_dev,
1360 &iio_pollfunc_store_time,
1361 kmx61_trigger_handler,
1362 NULL);
1363 if (ret < 0) {
1364 dev_err(&data->client->dev,
1365 "Failed to setup acc triggered buffer\n");
1366 goto err_trigger_unregister_motion;
1367 }
1368
1369 ret = iio_triggered_buffer_setup(data->mag_indio_dev,
1370 &iio_pollfunc_store_time,
1371 kmx61_trigger_handler,
1372 NULL);
1373 if (ret < 0) {
1374 dev_err(&data->client->dev,
1375 "Failed to setup mag triggered buffer\n");
1376 goto err_buffer_cleanup_acc;
1377 }
1378 }
1379
1380 ret = pm_runtime_set_active(&client->dev);
1381 if (ret < 0)
1382 goto err_buffer_cleanup_mag;
1383
1384 pm_runtime_enable(&client->dev);
1385 pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS);
1386 pm_runtime_use_autosuspend(&client->dev);
1387
1388 ret = iio_device_register(data->acc_indio_dev);
1389 if (ret < 0) {
1390 dev_err(&client->dev, "Failed to register acc iio device\n");
1391 goto err_buffer_cleanup_mag;
1392 }
1393
1394 ret = iio_device_register(data->mag_indio_dev);
1395 if (ret < 0) {
1396 dev_err(&client->dev, "Failed to register mag iio device\n");
1397 goto err_iio_unregister_acc;
1398 }
1399
1400 return 0;
1401
1402 err_iio_unregister_acc:
1403 iio_device_unregister(data->acc_indio_dev);
1404 err_buffer_cleanup_mag:
1405 if (client->irq > 0)
1406 iio_triggered_buffer_cleanup(data->mag_indio_dev);
1407 err_buffer_cleanup_acc:
1408 if (client->irq > 0)
1409 iio_triggered_buffer_cleanup(data->acc_indio_dev);
1410 err_trigger_unregister_motion:
1411 iio_trigger_unregister(data->motion_trig);
1412 err_trigger_unregister_mag_dready:
1413 iio_trigger_unregister(data->mag_dready_trig);
1414 err_trigger_unregister_acc_dready:
1415 iio_trigger_unregister(data->acc_dready_trig);
1416 err_chip_uninit:
1417 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1418 return ret;
1419 }
1420
1421 static int kmx61_remove(struct i2c_client *client)
1422 {
1423 struct kmx61_data *data = i2c_get_clientdata(client);
1424
1425 iio_device_unregister(data->acc_indio_dev);
1426 iio_device_unregister(data->mag_indio_dev);
1427
1428 pm_runtime_disable(&client->dev);
1429 pm_runtime_set_suspended(&client->dev);
1430 pm_runtime_put_noidle(&client->dev);
1431
1432 if (client->irq > 0) {
1433 iio_triggered_buffer_cleanup(data->acc_indio_dev);
1434 iio_triggered_buffer_cleanup(data->mag_indio_dev);
1435 iio_trigger_unregister(data->acc_dready_trig);
1436 iio_trigger_unregister(data->mag_dready_trig);
1437 iio_trigger_unregister(data->motion_trig);
1438 }
1439
1440 mutex_lock(&data->lock);
1441 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1442 mutex_unlock(&data->lock);
1443
1444 return 0;
1445 }
1446
1447 #ifdef CONFIG_PM_SLEEP
1448 static int kmx61_suspend(struct device *dev)
1449 {
1450 int ret;
1451 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1452
1453 mutex_lock(&data->lock);
1454 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
1455 false);
1456 mutex_unlock(&data->lock);
1457
1458 return ret;
1459 }
1460
1461 static int kmx61_resume(struct device *dev)
1462 {
1463 u8 stby = 0;
1464 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1465
1466 if (data->acc_stby)
1467 stby |= KMX61_ACC_STBY_BIT;
1468 if (data->mag_stby)
1469 stby |= KMX61_MAG_STBY_BIT;
1470
1471 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
1472 }
1473 #endif
1474
1475 #ifdef CONFIG_PM
1476 static int kmx61_runtime_suspend(struct device *dev)
1477 {
1478 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1479 int ret;
1480
1481 mutex_lock(&data->lock);
1482 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
1483 mutex_unlock(&data->lock);
1484
1485 return ret;
1486 }
1487
1488 static int kmx61_runtime_resume(struct device *dev)
1489 {
1490 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
1491 u8 stby = 0;
1492
1493 if (!data->acc_ps)
1494 stby |= KMX61_ACC_STBY_BIT;
1495 if (!data->mag_ps)
1496 stby |= KMX61_MAG_STBY_BIT;
1497
1498 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
1499 }
1500 #endif
1501
1502 static const struct dev_pm_ops kmx61_pm_ops = {
1503 SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
1504 SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
1505 };
1506
1507 static const struct acpi_device_id kmx61_acpi_match[] = {
1508 {"KMX61021", 0},
1509 {}
1510 };
1511
1512 MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);
1513
1514 static const struct i2c_device_id kmx61_id[] = {
1515 {"kmx611021", 0},
1516 {}
1517 };
1518
1519 MODULE_DEVICE_TABLE(i2c, kmx61_id);
1520
1521 static struct i2c_driver kmx61_driver = {
1522 .driver = {
1523 .name = KMX61_DRV_NAME,
1524 .acpi_match_table = ACPI_PTR(kmx61_acpi_match),
1525 .pm = &kmx61_pm_ops,
1526 },
1527 .probe = kmx61_probe,
1528 .remove = kmx61_remove,
1529 .id_table = kmx61_id,
1530 };
1531
1532 module_i2c_driver(kmx61_driver);
1533
1534 MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
1535 MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver");
1536 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support