kmx61.c 35.9 KB
Newer Older
1
// SPDX-License-Identifier: GPL-2.0-only
2 3 4 5 6 7 8 9 10 11
/*
 * KMX61 - Kionix 6-axis Accelerometer/Magnetometer
 *
 * Copyright (c) 2014, Intel Corporation.
 *
 * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F).
 */

#include <linux/module.h>
#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 17
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
18
#include <linux/iio/events.h>
19 20 21 22
#include <linux/iio/trigger.h>
#include <linux/iio/buffer.h>
#include <linux/iio/triggered_buffer.h>
#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 29
#define KMX61_REG_INS1		0x01
#define KMX61_REG_INS2		0x02
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

/*
 * three 16-bit accelerometer output registers for X/Y/Z axis
 * we use only XOUT_L as a base register, all other addresses
 * can be obtained by applying an offset and are provided here
 * only for clarity.
 */
#define KMX61_ACC_XOUT_L	0x0A
#define KMX61_ACC_XOUT_H	0x0B
#define KMX61_ACC_YOUT_L	0x0C
#define KMX61_ACC_YOUT_H	0x0D
#define KMX61_ACC_ZOUT_L	0x0E
#define KMX61_ACC_ZOUT_H	0x0F

/*
 * one 16-bit temperature output register
 */
#define KMX61_TEMP_L		0x10
#define KMX61_TEMP_H		0x11

/*
 * three 16-bit magnetometer output registers for X/Y/Z axis
 */
#define KMX61_MAG_XOUT_L	0x12
#define KMX61_MAG_XOUT_H	0x13
#define KMX61_MAG_YOUT_L	0x14
#define KMX61_MAG_YOUT_H	0x15
#define KMX61_MAG_ZOUT_L	0x16
#define KMX61_MAG_ZOUT_H	0x17

60
#define KMX61_REG_INL		0x28
61 62
#define KMX61_REG_STBY		0x29
#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 68 69
#define KMX61_REG_WUF_THRESH	0x3D
#define KMX61_REG_WUF_TIMER	0x3E

70 71 72 73 74 75
#define KMX61_ACC_STBY_BIT	BIT(0)
#define KMX61_MAG_STBY_BIT	BIT(1)
#define KMX61_ACT_STBY_BIT	BIT(7)

#define KMX61_ALL_STBY		(KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT)

76 77 78 79 80 81 82 83 84
#define KMX61_REG_INS1_BIT_WUFS		BIT(1)

#define KMX61_REG_INS2_BIT_ZP		BIT(0)
#define KMX61_REG_INS2_BIT_ZN		BIT(1)
#define KMX61_REG_INS2_BIT_YP		BIT(2)
#define KMX61_REG_INS2_BIT_YN		BIT(3)
#define KMX61_REG_INS2_BIT_XP		BIT(4)
#define KMX61_REG_INS2_BIT_XN		BIT(5)

85 86
#define KMX61_REG_CTRL1_GSEL_MASK	0x03

87 88
#define KMX61_REG_CTRL1_BIT_RES		BIT(4)
#define KMX61_REG_CTRL1_BIT_DRDYE	BIT(5)
89 90
#define KMX61_REG_CTRL1_BIT_WUFE	BIT(6)
#define KMX61_REG_CTRL1_BIT_BTSE	BIT(7)
91

92
#define KMX61_REG_INC1_BIT_WUFS		BIT(0)
93 94 95 96
#define KMX61_REG_INC1_BIT_DRDYM	BIT(1)
#define KMX61_REG_INC1_BIT_DRDYA	BIT(2)
#define KMX61_REG_INC1_BIT_IEN		BIT(5)

97 98 99 100 101
#define KMX61_ACC_ODR_SHIFT	0
#define KMX61_MAG_ODR_SHIFT	4
#define KMX61_ACC_ODR_MASK	0x0F
#define KMX61_MAG_ODR_MASK	0xF0

102 103 104 105 106
#define KMX61_OWUF_MASK		0x7

#define KMX61_DEFAULT_WAKE_THRESH	1
#define KMX61_DEFAULT_WAKE_DURATION	1

107 108
#define KMX61_SLEEP_DELAY_MS	2000

109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
#define KMX61_CHIP_ID		0x12

/* KMX61 devices */
#define KMX61_ACC	0x01
#define KMX61_MAG	0x02

struct kmx61_data {
	struct i2c_client *client;

	/* serialize access to non-atomic ops, e.g set_mode */
	struct mutex lock;

	/* standby state */
	bool acc_stby;
	bool mag_stby;

125 126 127 128
	/* power state */
	bool acc_ps;
	bool mag_ps;

129 130 131
	/* config bits */
	u8 range;
	u8 odr_bits;
132 133
	u8 wake_thresh;
	u8 wake_duration;
134 135 136

	/* accelerometer specific data */
	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;
140 141
	bool motion_trig_on;
	bool ev_enable_state;
142 143 144

	/* magnetometer specific data */
	struct iio_dev *mag_indio_dev;
145 146
	struct iio_trigger *mag_dready_trig;
	bool mag_dready_trig_on;
147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
};

enum kmx61_range {
	KMX61_RANGE_2G,
	KMX61_RANGE_4G,
	KMX61_RANGE_8G,
};

enum kmx61_axis {
	KMX61_AXIS_X,
	KMX61_AXIS_Y,
	KMX61_AXIS_Z,
};

static const u16 kmx61_uscale_table[] = {9582, 19163, 38326};

static const struct {
	int val;
	int val2;
166 167 168 169 170 171 172 173 174 175 176 177
} kmx61_samp_freq_table[] = { {12, 500000},
			{25, 0},
			{50, 0},
			{100, 0},
			{200, 0},
			{400, 0},
			{800, 0},
			{1600, 0},
			{0, 781000},
			{1, 563000},
			{3, 125000},
			{6, 250000} };
178

179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
static const struct {
	int val;
	int val2;
	int odr_bits;
} kmx61_wake_up_odr_table[] = { {0, 781000, 0x00},
				 {1, 563000, 0x01},
				 {3, 125000, 0x02},
				 {6, 250000, 0x03},
				 {12, 500000, 0x04},
				 {25, 0, 0x05},
				 {50, 0, 0x06},
				 {100, 0, 0x06},
				 {200, 0, 0x06},
				 {400, 0, 0x06},
				 {800, 0, 0x06},
				 {1600, 0, 0x06} };

196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220
static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326");
static IIO_CONST_ATTR(magn_scale_available, "0.001465");
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
	"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800");

static struct attribute *kmx61_acc_attributes[] = {
	&iio_const_attr_accel_scale_available.dev_attr.attr,
	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
	NULL,
};

static struct attribute *kmx61_mag_attributes[] = {
	&iio_const_attr_magn_scale_available.dev_attr.attr,
	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
	NULL,
};

static const struct attribute_group kmx61_acc_attribute_group = {
	.attrs = kmx61_acc_attributes,
};

static const struct attribute_group kmx61_mag_attribute_group = {
	.attrs = kmx61_mag_attributes,
};

221 222 223 224 225 226 227 228
static const struct iio_event_spec kmx61_event = {
	.type = IIO_EV_TYPE_THRESH,
	.dir = IIO_EV_DIR_EITHER,
	.mask_separate = BIT(IIO_EV_INFO_VALUE) |
			 BIT(IIO_EV_INFO_ENABLE) |
			 BIT(IIO_EV_INFO_PERIOD),
};

229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
#define KMX61_ACC_CHAN(_axis) { \
	.type = IIO_ACCEL, \
	.modified = 1, \
	.channel2 = IIO_MOD_ ## _axis, \
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
				BIT(IIO_CHAN_INFO_SAMP_FREQ), \
	.address = KMX61_ACC, \
	.scan_index = KMX61_AXIS_ ## _axis, \
	.scan_type = { \
		.sign = 's', \
		.realbits = 12, \
		.storagebits = 16, \
		.shift = 4, \
		.endianness = IIO_LE, \
	}, \
245 246
	.event_spec = &kmx61_event, \
	.num_event_specs = 1 \
247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
}

#define KMX61_MAG_CHAN(_axis) { \
	.type = IIO_MAGN, \
	.modified = 1, \
	.channel2 = IIO_MOD_ ## _axis, \
	.address = KMX61_MAG, \
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
				BIT(IIO_CHAN_INFO_SAMP_FREQ), \
	.scan_index = KMX61_AXIS_ ## _axis, \
	.scan_type = { \
		.sign = 's', \
		.realbits = 14, \
		.storagebits = 16, \
		.shift = 2, \
		.endianness = IIO_LE, \
	}, \
}

static const struct iio_chan_spec kmx61_acc_channels[] = {
	KMX61_ACC_CHAN(X),
	KMX61_ACC_CHAN(Y),
	KMX61_ACC_CHAN(Z),
};

static const struct iio_chan_spec kmx61_mag_channels[] = {
	KMX61_MAG_CHAN(X),
	KMX61_MAG_CHAN(Y),
	KMX61_MAG_CHAN(Z),
};

static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data)
{
	struct kmx61_data **priv = iio_priv(indio_dev);

	*priv = data;
}

static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev)
{
	return *(struct kmx61_data **)iio_priv(indio_dev);
}

static int kmx61_convert_freq_to_bit(int val, int val2)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++)
		if (val == kmx61_samp_freq_table[i].val &&
		    val2 == kmx61_samp_freq_table[i].val2)
298
			return i;
299 300 301 302 303 304 305 306 307 308 309 310 311 312
	return -EINVAL;
}

static int kmx61_convert_wake_up_odr_to_bit(int val, int val2)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i)
		if (kmx61_wake_up_odr_table[i].val == val &&
			kmx61_wake_up_odr_table[i].val2 == val2)
				return kmx61_wake_up_odr_table[i].odr_bits;
	return -EINVAL;
}

313 314
/**
 * kmx61_set_mode() - set KMX61 device operating mode
315 316 317 318
 * @data: kmx61 device private data pointer
 * @mode: bitmask, indicating operating mode for @device
 * @device: bitmask, indicating device for which @mode needs to be set
 * @update: update stby bits stored in device's private  @data
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400
 *
 * For each sensor (accelerometer/magnetometer) there are two operating modes
 * STANDBY and OPERATION. Neither accel nor magn can be disabled independently
 * if they are both enabled. Internal sensors state is saved in acc_stby and
 * mag_stby members of driver's private @data.
 */
static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device,
			  bool update)
{
	int ret;
	int acc_stby = -1, mag_stby = -1;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_stby\n");
		return ret;
	}
	if (device & KMX61_ACC) {
		if (mode & KMX61_ACC_STBY_BIT) {
			ret |= KMX61_ACC_STBY_BIT;
			acc_stby = 1;
		} else {
			ret &= ~KMX61_ACC_STBY_BIT;
			acc_stby = 0;
		}
	}

	if (device & KMX61_MAG) {
		if (mode & KMX61_MAG_STBY_BIT) {
			ret |= KMX61_MAG_STBY_BIT;
			mag_stby = 1;
		} else {
			ret &= ~KMX61_MAG_STBY_BIT;
			mag_stby = 0;
		}
	}

	if (mode & KMX61_ACT_STBY_BIT)
		ret |= KMX61_ACT_STBY_BIT;

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_stby\n");
		return ret;
	}

	if (acc_stby != -1 && update)
		data->acc_stby = acc_stby;
	if (mag_stby != -1 && update)
		data->mag_stby = mag_stby;

	return 0;
}

static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
{
	int ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_stby\n");
		return ret;
	}
	*mode = 0;

	if (device & KMX61_ACC) {
		if (ret & KMX61_ACC_STBY_BIT)
			*mode |= KMX61_ACC_STBY_BIT;
		else
			*mode &= ~KMX61_ACC_STBY_BIT;
	}

	if (device & KMX61_MAG) {
		if (ret & KMX61_MAG_STBY_BIT)
			*mode |= KMX61_MAG_STBY_BIT;
		else
			*mode &= ~KMX61_MAG_STBY_BIT;
	}

	return 0;
}

401
static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
402 403 404 405 406 407 408 409 410 411 412 413 414 415
{
	int ret, odr_bits;

	odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2);
	if (odr_bits < 0)
		return odr_bits;

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2,
					odr_bits);
	if (ret < 0)
		dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
	return ret;
}

416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446
static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
{
	int ret;
	u8 mode;
	int lodr_bits, odr_bits;

	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
	if (ret < 0)
		return ret;

	lodr_bits = kmx61_convert_freq_to_bit(val, val2);
	if (lodr_bits < 0)
		return lodr_bits;

	/* To change ODR, accel and magn must be in STDBY */
	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
			     true);
	if (ret < 0)
		return ret;

	odr_bits = 0;
	if (device & KMX61_ACC)
		odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT;
	if (device & KMX61_MAG)
		odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT;

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL,
					odr_bits);
	if (ret < 0)
		return ret;

447 448
	data->odr_bits = odr_bits;

449 450 451 452 453 454
	if (device & KMX61_ACC) {
		ret = kmx61_set_wake_up_odr(data, val, val2);
		if (ret)
			return ret;
	}

455 456 457 458 459
	return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
}

static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2,
			 u8 device)
460
{
461 462 463 464 465 466 467 468 469 470 471
	u8 lodr_bits;

	if (device & KMX61_ACC)
		lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) &
			     KMX61_ACC_ODR_MASK;
	else if (device & KMX61_MAG)
		lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) &
			     KMX61_MAG_ODR_MASK;
	else
		return -EINVAL;

472 473 474 475 476 477 478
	if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table))
		return -EINVAL;

	*val = kmx61_samp_freq_table[lodr_bits].val;
	*val2 = kmx61_samp_freq_table[lodr_bits].val2;

	return 0;
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534
}

static int kmx61_set_range(struct kmx61_data *data, u8 range)
{
	int ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
		return ret;
	}

	ret &= ~KMX61_REG_CTRL1_GSEL_MASK;
	ret |= range & KMX61_REG_CTRL1_GSEL_MASK;

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
		return ret;
	}

	data->range = range;

	return 0;
}

static int kmx61_set_scale(struct kmx61_data *data, u16 uscale)
{
	int ret, i;
	u8  mode;

	for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) {
		if (kmx61_uscale_table[i] == uscale) {
			ret = kmx61_get_mode(data, &mode,
					     KMX61_ACC | KMX61_MAG);
			if (ret < 0)
				return ret;

			ret = kmx61_set_mode(data, KMX61_ALL_STBY,
					     KMX61_ACC | KMX61_MAG, true);
			if (ret < 0)
				return ret;

			ret = kmx61_set_range(data, i);
			if (ret < 0)
				return ret;

			return  kmx61_set_mode(data, mode,
					       KMX61_ACC | KMX61_MAG, true);
		}
	}
	return -EINVAL;
}

static int kmx61_chip_init(struct kmx61_data *data)
{
535
	int ret, val, val2;
536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading who_am_i\n");
		return ret;
	}

	if (ret != KMX61_CHIP_ID) {
		dev_err(&data->client->dev,
			"Wrong chip id, got %x expected %x\n",
			 ret, KMX61_CHIP_ID);
		return -EINVAL;
	}

	/* set accel 12bit, 4g range */
	ret = kmx61_set_range(data, KMX61_RANGE_4G);
	if (ret < 0)
		return ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_odcntl\n");
		return ret;
	}
	data->odr_bits = ret;

562 563 564 565 566
	/*
	 * set output data rate for wake up (motion detection) function
	 * to match data rate for accelerometer sampling
	 */
	ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC);
567 568 569 570 571 572 573
	if (ret < 0)
		return ret;

	ret = kmx61_set_wake_up_odr(data, val, val2);
	if (ret < 0)
		return ret;

574 575 576 577 578
	/* set acc/magn to OPERATION mode */
	ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true);
	if (ret < 0)
		return ret;

579 580 581
	data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH;
	data->wake_duration = KMX61_DEFAULT_WAKE_DURATION;

582 583 584
	return 0;
}

585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640
static int kmx61_setup_new_data_interrupt(struct kmx61_data *data,
					  bool status, u8 device)
{
	u8 mode;
	int ret;

	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
	if (ret < 0)
		return ret;

	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
	if (ret < 0)
		return ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
		return ret;
	}

	if (status) {
		ret |= KMX61_REG_INC1_BIT_IEN;
		if (device & KMX61_ACC)
			ret |= KMX61_REG_INC1_BIT_DRDYA;
		if (device & KMX61_MAG)
			ret |=  KMX61_REG_INC1_BIT_DRDYM;
	} else {
		ret &= ~KMX61_REG_INC1_BIT_IEN;
		if (device & KMX61_ACC)
			ret &= ~KMX61_REG_INC1_BIT_DRDYA;
		if (device & KMX61_MAG)
			ret &= ~KMX61_REG_INC1_BIT_DRDYM;
	}
	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
		return ret;
	}

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
		return ret;
	}

	if (status)
		ret |= KMX61_REG_CTRL1_BIT_DRDYE;
	else
		ret &= ~KMX61_REG_CTRL1_BIT_DRDYE;

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
		return ret;
	}

641
	return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
642 643
}

644 645 646 647 648 649 650 651
static int kmx61_chip_update_thresholds(struct kmx61_data *data)
{
	int ret;

	ret = i2c_smbus_write_byte_data(data->client,
					KMX61_REG_WUF_TIMER,
					data->wake_duration);
	if (ret < 0) {
652
		dev_err(&data->client->dev, "Error writing reg_wuf_timer\n");
653 654 655 656 657 658
		return ret;
	}

	ret = i2c_smbus_write_byte_data(data->client,
					KMX61_REG_WUF_THRESH,
					data->wake_thresh);
659
	if (ret < 0)
660 661
		dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n");

662
	return ret;
663 664 665
}

static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data,
666
					    bool status)
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715
{
	u8 mode;
	int ret;

	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
	if (ret < 0)
		return ret;

	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
	if (ret < 0)
		return ret;

	ret = kmx61_chip_update_thresholds(data);
	if (ret < 0)
		return ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_inc1\n");
		return ret;
	}
	if (status)
		ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
	else
		ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_inc1\n");
		return ret;
	}

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
		return ret;
	}

	if (status)
		ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE;
	else
		ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE);

	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
		return ret;
	}
	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
721 722 723
 * @data: kmx61 device private pointer
 * @on: power state to be set for @device
 * @device: bitmask indicating device for which @on state needs to be set
724 725 726 727 728 729 730 731
 *
 * Notice that when ACC power state needs to be set to ON and MAG is in
 * OPERATION then we know that kmx61_runtime_resume was already called
 * so we must set ACC OPERATION mode here. The same happens when MAG power
 * state needs to be set to ON and ACC is in OPERATION.
 */
static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device)
{
732
#ifdef CONFIG_PM
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752
	int ret;

	if (device & KMX61_ACC) {
		if (on && !data->acc_ps && !data->mag_stby) {
			ret = kmx61_set_mode(data, 0, KMX61_ACC, true);
			if (ret < 0)
				return ret;
		}
		data->acc_ps = on;
	}
	if (device & KMX61_MAG) {
		if (on && !data->mag_ps && !data->acc_stby) {
			ret = kmx61_set_mode(data, 0, KMX61_MAG, true);
			if (ret < 0)
				return ret;
		}
		data->mag_ps = on;
	}

	if (on) {
753
		ret = pm_runtime_resume_and_get(&data->client->dev);
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
	} else {
		pm_runtime_mark_last_busy(&data->client->dev);
		ret = pm_runtime_put_autosuspend(&data->client->dev);
	}
	if (ret < 0) {
		dev_err(&data->client->dev,
			"Failed: kmx61_set_power_state for %d, ret %d\n",
			on, ret);

		return ret;
	}
#endif
	return 0;
}

769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset)
{
	int ret;
	u8 reg = base + offset * 2;

	ret = i2c_smbus_read_word_data(data->client, reg);
	if (ret < 0)
		dev_err(&data->client->dev, "failed to read reg at %x\n", reg);

	return ret;
}

static int kmx61_read_raw(struct iio_dev *indio_dev,
			  struct iio_chan_spec const *chan, int *val,
			  int *val2, long mask)
{
	int ret;
	u8 base_reg;
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		switch (chan->type) {
		case IIO_ACCEL:
			base_reg = KMX61_ACC_XOUT_L;
			break;
		case IIO_MAGN:
			base_reg = KMX61_MAG_XOUT_L;
			break;
		default:
			return -EINVAL;
		}
		mutex_lock(&data->lock);

803 804 805 806 807 808
		ret = kmx61_set_power_state(data, true, chan->address);
		if (ret) {
			mutex_unlock(&data->lock);
			return ret;
		}

809 810
		ret = kmx61_read_measurement(data, base_reg, chan->scan_index);
		if (ret < 0) {
811
			kmx61_set_power_state(data, false, chan->address);
812 813 814 815 816
			mutex_unlock(&data->lock);
			return ret;
		}
		*val = sign_extend32(ret >> chan->scan_type.shift,
				     chan->scan_type.realbits - 1);
817
		ret = kmx61_set_power_state(data, false, chan->address);
818 819

		mutex_unlock(&data->lock);
820 821
		if (ret)
			return ret;
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_ACCEL:
			*val = 0;
			*val2 = kmx61_uscale_table[data->range];
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_MAGN:
			/* 14 bits res, 1465 microGauss per magn count */
			*val = 0;
			*val2 = 1465;
			return IIO_VAL_INT_PLUS_MICRO;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_SAMP_FREQ:
		if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
			return -EINVAL;

		mutex_lock(&data->lock);
		ret = kmx61_get_odr(data, val, val2, chan->address);
		mutex_unlock(&data->lock);
		if (ret)
			return -EINVAL;
		return IIO_VAL_INT_PLUS_MICRO;
	}
	return -EINVAL;
}

static int kmx61_write_raw(struct iio_dev *indio_dev,
			   struct iio_chan_spec const *chan, int val,
			   int val2, long mask)
{
	int ret;
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	switch (mask) {
	case IIO_CHAN_INFO_SAMP_FREQ:
		if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
			return -EINVAL;

		mutex_lock(&data->lock);
		ret = kmx61_set_odr(data, val, val2, chan->address);
		mutex_unlock(&data->lock);
		return ret;
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_ACCEL:
			if (val != 0)
				return -EINVAL;
			mutex_lock(&data->lock);
			ret = kmx61_set_scale(data, val2);
			mutex_unlock(&data->lock);
			return ret;
		default:
			return -EINVAL;
		}
	default:
		return -EINVAL;
	}
}

884 885 886 887 888 889 890 891 892 893 894 895 896
static int kmx61_read_event(struct iio_dev *indio_dev,
			    const struct iio_chan_spec *chan,
			    enum iio_event_type type,
			    enum iio_event_direction dir,
			    enum iio_event_info info,
			    int *val, int *val2)
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	*val2 = 0;
	switch (info) {
	case IIO_EV_INFO_VALUE:
		*val = data->wake_thresh;
897
		return IIO_VAL_INT;
898 899
	case IIO_EV_INFO_PERIOD:
		*val = data->wake_duration;
900
		return IIO_VAL_INT;
901 902 903 904 905 906
	default:
		return -EINVAL;
	}
}

static int kmx61_write_event(struct iio_dev *indio_dev,
907 908 909 910 911
			     const struct iio_chan_spec *chan,
			     enum iio_event_type type,
			     enum iio_event_direction dir,
			     enum iio_event_info info,
			     int val, int val2)
912 913 914 915 916 917 918 919 920
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	if (data->ev_enable_state)
		return -EBUSY;

	switch (info) {
	case IIO_EV_INFO_VALUE:
		data->wake_thresh = val;
921
		return IIO_VAL_INT;
922 923
	case IIO_EV_INFO_PERIOD:
		data->wake_duration = val;
924
		return IIO_VAL_INT;
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940
	default:
		return -EINVAL;
	}
}

static int kmx61_read_event_config(struct iio_dev *indio_dev,
				   const struct iio_chan_spec *chan,
				   enum iio_event_type type,
				   enum iio_event_direction dir)
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	return data->ev_enable_state;
}

static int kmx61_write_event_config(struct iio_dev *indio_dev,
941 942 943 944
				    const struct iio_chan_spec *chan,
				    enum iio_event_type type,
				    enum iio_event_direction dir,
				    int state)
945 946
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);
947
	int ret = 0;
948 949 950 951 952 953 954

	if (state && data->ev_enable_state)
		return 0;

	mutex_lock(&data->lock);

	if (!state && data->motion_trig_on) {
955
		data->ev_enable_state = false;
956
		goto err_unlock;
957 958 959
	}

	ret = kmx61_set_power_state(data, state, KMX61_ACC);
960 961
	if (ret < 0)
		goto err_unlock;
962

963
	ret = kmx61_setup_any_motion_interrupt(data, state);
964 965
	if (ret < 0) {
		kmx61_set_power_state(data, false, KMX61_ACC);
966
		goto err_unlock;
967 968 969
	}

	data->ev_enable_state = state;
970 971

err_unlock:
972 973
	mutex_unlock(&data->lock);

974
	return ret;
975 976
}

977 978 979 980 981
static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev,
				      struct iio_trigger *trig)
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);

982
	if (data->acc_dready_trig != trig && data->motion_trig != trig)
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998
		return -EINVAL;

	return 0;
}

static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev,
				      struct iio_trigger *trig)
{
	struct kmx61_data *data = kmx61_get_data(indio_dev);

	if (data->mag_dready_trig != trig)
		return -EINVAL;

	return 0;
}

999 1000 1001 1002
static const struct iio_info kmx61_acc_info = {
	.read_raw		= kmx61_read_raw,
	.write_raw		= kmx61_write_raw,
	.attrs			= &kmx61_acc_attribute_group,
1003 1004 1005 1006
	.read_event_value	= kmx61_read_event,
	.write_event_value	= kmx61_write_event,
	.read_event_config	= kmx61_read_event_config,
	.write_event_config	= kmx61_write_event_config,
1007
	.validate_trigger	= kmx61_acc_validate_trigger,
1008 1009 1010 1011 1012 1013
};

static const struct iio_info kmx61_mag_info = {
	.read_raw		= kmx61_read_raw,
	.write_raw		= kmx61_write_raw,
	.attrs			= &kmx61_mag_attribute_group,
1014
	.validate_trigger	= kmx61_mag_validate_trigger,
1015 1016
};

1017 1018 1019 1020 1021 1022 1023 1024

static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
					    bool state)
{
	int ret = 0;
	u8 device;

	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1025
	struct kmx61_data *data = kmx61_get_data(indio_dev);
1026 1027 1028

	mutex_lock(&data->lock);

1029 1030
	if (!state && data->ev_enable_state && data->motion_trig_on) {
		data->motion_trig_on = false;
1031
		goto err_unlock;
1032 1033
	}

1034
	if (data->acc_dready_trig == trig || data->motion_trig == trig)
1035 1036 1037 1038 1039
		device = KMX61_ACC;
	else
		device = KMX61_MAG;

	ret = kmx61_set_power_state(data, state, device);
1040 1041
	if (ret < 0)
		goto err_unlock;
1042

1043 1044 1045
	if (data->acc_dready_trig == trig || data->mag_dready_trig == trig)
		ret = kmx61_setup_new_data_interrupt(data, state, device);
	else
1046
		ret = kmx61_setup_any_motion_interrupt(data, state);
1047 1048
	if (ret < 0) {
		kmx61_set_power_state(data, false, device);
1049
		goto err_unlock;
1050 1051 1052 1053
	}

	if (data->acc_dready_trig == trig)
		data->acc_dready_trig_on = state;
1054
	else if (data->mag_dready_trig == trig)
1055
		data->mag_dready_trig_on = state;
1056 1057
	else
		data->motion_trig_on = state;
1058
err_unlock:
1059 1060
	mutex_unlock(&data->lock);

1061
	return ret;
1062 1063
}

1064
static void kmx61_trig_reenable(struct iio_trigger *trig)
1065 1066 1067 1068 1069 1070
{
	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
	struct kmx61_data *data = kmx61_get_data(indio_dev);
	int ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
1071
	if (ret < 0)
1072 1073 1074 1075 1076
		dev_err(&data->client->dev, "Error reading reg_inl\n");
}

static const struct iio_trigger_ops kmx61_trigger_ops = {
	.set_trigger_state = kmx61_data_rdy_trigger_set_state,
1077
	.reenable = kmx61_trig_reenable,
1078 1079
};

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
static irqreturn_t kmx61_event_handler(int irq, void *private)
{
	struct kmx61_data *data = private;
	struct iio_dev *indio_dev = data->acc_indio_dev;
	int ret;

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
	if (ret < 0) {
		dev_err(&data->client->dev, "Error reading reg_ins1\n");
		goto ack_intr;
	}

	if (ret & KMX61_REG_INS1_BIT_WUFS) {
		ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
		if (ret < 0) {
			dev_err(&data->client->dev, "Error reading reg_ins2\n");
			goto ack_intr;
		}

		if (ret & KMX61_REG_INS2_BIT_XN)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_X,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_FALLING),
				       0);

		if (ret & KMX61_REG_INS2_BIT_XP)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_X,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_RISING),
				       0);

		if (ret & KMX61_REG_INS2_BIT_YN)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_Y,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_FALLING),
				       0);

		if (ret & KMX61_REG_INS2_BIT_YP)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_Y,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_RISING),
				       0);

		if (ret & KMX61_REG_INS2_BIT_ZN)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_Z,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_FALLING),
				       0);

		if (ret & KMX61_REG_INS2_BIT_ZP)
			iio_push_event(indio_dev,
				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
				       0,
				       IIO_MOD_Z,
				       IIO_EV_TYPE_THRESH,
				       IIO_EV_DIR_RISING),
				       0);
	}

ack_intr:
	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
	if (ret < 0)
		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");

	ret |= KMX61_REG_CTRL1_BIT_RES;
	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
	if (ret < 0)
1162
		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
1163 1164 1165 1166 1167 1168 1169 1170

	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
	if (ret < 0)
		dev_err(&data->client->dev, "Error reading reg_inl\n");

	return IRQ_HANDLED;
}

1171 1172 1173 1174 1175 1176 1177 1178 1179
static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
{
	struct kmx61_data *data = private;

	if (data->acc_dready_trig_on)
		iio_trigger_poll(data->acc_dready_trig);
	if (data->mag_dready_trig_on)
		iio_trigger_poll(data->mag_dready_trig);

1180 1181 1182 1183 1184
	if (data->motion_trig_on)
		iio_trigger_poll(data->motion_trig);

	if (data->ev_enable_state)
		return IRQ_WAKE_THREAD;
1185 1186 1187 1188 1189 1190 1191 1192 1193
	return IRQ_HANDLED;
}

static irqreturn_t kmx61_trigger_handler(int irq, void *p)
{
	struct iio_poll_func *pf = p;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct kmx61_data *data = kmx61_get_data(indio_dev);
	int bit, ret, i = 0;
1194
	u8 base;
1195 1196
	s16 buffer[8];

1197 1198 1199 1200 1201
	if (indio_dev == data->acc_indio_dev)
		base = KMX61_ACC_XOUT_L;
	else
		base = KMX61_MAG_XOUT_L;

1202
	mutex_lock(&data->lock);
1203
	iio_for_each_active_channel(indio_dev, bit) {
1204
		ret = kmx61_read_measurement(data, base, bit);
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
		if (ret < 0) {
			mutex_unlock(&data->lock);
			goto err;
		}
		buffer[i++] = ret;
	}
	mutex_unlock(&data->lock);

	iio_push_to_buffers(indio_dev, buffer);
err:
	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
}

1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
static const char *kmx61_match_acpi_device(struct device *dev)
{
	const struct acpi_device_id *id;

	id = acpi_match_device(dev->driver->acpi_match_table, dev);
	if (!id)
		return NULL;
	return dev_name(dev);
}

1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
					    const struct iio_info *info,
					    const struct iio_chan_spec *chan,
					    int num_channels,
					    const char *name)
{
	struct iio_dev *indio_dev;

	indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data));
	if (!indio_dev)
		return ERR_PTR(-ENOMEM);

	kmx61_set_data(indio_dev, data);

	indio_dev->channels = chan;
	indio_dev->num_channels = num_channels;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->info = info;

	return indio_dev;
}

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263
static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
					       struct iio_dev *indio_dev,
					       const char *tag)
{
	struct iio_trigger *trig;
	int ret;

	trig = devm_iio_trigger_alloc(&data->client->dev,
				      "%s-%s-dev%d",
				      indio_dev->name,
				      tag,
1264
				      iio_device_id(indio_dev));
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277
	if (!trig)
		return ERR_PTR(-ENOMEM);

	trig->ops = &kmx61_trigger_ops;
	iio_trigger_set_drvdata(trig, indio_dev);

	ret = iio_trigger_register(trig);
	if (ret)
		return ERR_PTR(ret);

	return trig;
}

1278
static int kmx61_probe(struct i2c_client *client)
1279
{
1280
	const struct i2c_device_id *id = i2c_client_get_device_id(client);
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
	int ret;
	struct kmx61_data *data;
	const char *name = NULL;

	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	i2c_set_clientdata(client, data);
	data->client = client;

	mutex_init(&data->lock);

1294 1295 1296 1297 1298 1299 1300
	if (id)
		name = id->name;
	else if (ACPI_HANDLE(&client->dev))
		name = kmx61_match_acpi_device(&client->dev);
	else
		return -ENODEV;

1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
	data->acc_indio_dev =
		kmx61_indiodev_setup(data, &kmx61_acc_info,
				     kmx61_acc_channels,
				     ARRAY_SIZE(kmx61_acc_channels),
				     name);
	if (IS_ERR(data->acc_indio_dev))
		return PTR_ERR(data->acc_indio_dev);

	data->mag_indio_dev =
		kmx61_indiodev_setup(data, &kmx61_mag_info,
				     kmx61_mag_channels,
				     ARRAY_SIZE(kmx61_mag_channels),
				     name);
	if (IS_ERR(data->mag_indio_dev))
		return PTR_ERR(data->mag_indio_dev);

	ret = kmx61_chip_init(data);
	if (ret < 0)
		return ret;

1321
	if (client->irq > 0) {
1322 1323
		ret = devm_request_threaded_irq(&client->dev, client->irq,
						kmx61_data_rdy_trig_poll,
1324
						kmx61_event_handler,
1325 1326 1327 1328 1329 1330 1331 1332 1333
						IRQF_TRIGGER_RISING,
						KMX61_IRQ_NAME,
						data);
		if (ret)
			goto err_chip_uninit;

		data->acc_dready_trig =
			kmx61_trigger_setup(data, data->acc_indio_dev,
					    "dready");
1334 1335 1336 1337
		if (IS_ERR(data->acc_dready_trig)) {
			ret = PTR_ERR(data->acc_dready_trig);
			goto err_chip_uninit;
		}
1338 1339 1340 1341 1342 1343

		data->mag_dready_trig =
			kmx61_trigger_setup(data, data->mag_indio_dev,
					    "dready");
		if (IS_ERR(data->mag_dready_trig)) {
			ret = PTR_ERR(data->mag_dready_trig);
1344
			goto err_trigger_unregister_acc_dready;
1345 1346
		}

1347 1348 1349 1350 1351
		data->motion_trig =
			kmx61_trigger_setup(data, data->acc_indio_dev,
					    "any-motion");
		if (IS_ERR(data->motion_trig)) {
			ret = PTR_ERR(data->motion_trig);
1352
			goto err_trigger_unregister_mag_dready;
1353 1354
		}

1355 1356 1357 1358 1359 1360 1361
		ret = iio_triggered_buffer_setup(data->acc_indio_dev,
						 &iio_pollfunc_store_time,
						 kmx61_trigger_handler,
						 NULL);
		if (ret < 0) {
			dev_err(&data->client->dev,
				"Failed to setup acc triggered buffer\n");
1362
			goto err_trigger_unregister_motion;
1363 1364 1365 1366 1367 1368 1369 1370 1371
		}

		ret = iio_triggered_buffer_setup(data->mag_indio_dev,
						 &iio_pollfunc_store_time,
						 kmx61_trigger_handler,
						 NULL);
		if (ret < 0) {
			dev_err(&data->client->dev,
				"Failed to setup mag triggered buffer\n");
1372
			goto err_buffer_cleanup_acc;
1373 1374 1375
		}
	}

1376 1377 1378 1379 1380 1381 1382 1383
	ret = pm_runtime_set_active(&client->dev);
	if (ret < 0)
		goto err_buffer_cleanup_mag;

	pm_runtime_enable(&client->dev);
	pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS);
	pm_runtime_use_autosuspend(&client->dev);

1384 1385 1386
	ret = iio_device_register(data->acc_indio_dev);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to register acc iio device\n");
1387
		goto err_pm_cleanup;
1388 1389 1390 1391 1392
	}

	ret = iio_device_register(data->mag_indio_dev);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to register mag iio device\n");
1393
		goto err_iio_unregister_acc;
1394 1395 1396 1397
	}

	return 0;

1398
err_iio_unregister_acc:
1399
	iio_device_unregister(data->acc_indio_dev);
1400 1401 1402
err_pm_cleanup:
	pm_runtime_dont_use_autosuspend(&client->dev);
	pm_runtime_disable(&client->dev);
1403
err_buffer_cleanup_mag:
1404
	if (client->irq > 0)
1405
		iio_triggered_buffer_cleanup(data->mag_indio_dev);
1406
err_buffer_cleanup_acc:
1407
	if (client->irq > 0)
1408 1409 1410 1411 1412 1413 1414
		iio_triggered_buffer_cleanup(data->acc_indio_dev);
err_trigger_unregister_motion:
	iio_trigger_unregister(data->motion_trig);
err_trigger_unregister_mag_dready:
	iio_trigger_unregister(data->mag_dready_trig);
err_trigger_unregister_acc_dready:
	iio_trigger_unregister(data->acc_dready_trig);
1415 1416 1417 1418 1419
err_chip_uninit:
	kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
	return ret;
}

1420
static void kmx61_remove(struct i2c_client *client)
1421 1422 1423
{
	struct kmx61_data *data = i2c_get_clientdata(client);

1424 1425 1426
	iio_device_unregister(data->acc_indio_dev);
	iio_device_unregister(data->mag_indio_dev);

1427 1428 1429
	pm_runtime_disable(&client->dev);
	pm_runtime_set_suspended(&client->dev);

1430
	if (client->irq > 0) {
1431 1432 1433 1434
		iio_triggered_buffer_cleanup(data->acc_indio_dev);
		iio_triggered_buffer_cleanup(data->mag_indio_dev);
		iio_trigger_unregister(data->acc_dready_trig);
		iio_trigger_unregister(data->mag_dready_trig);
1435
		iio_trigger_unregister(data->motion_trig);
1436 1437
	}

1438 1439 1440 1441 1442
	mutex_lock(&data->lock);
	kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
	mutex_unlock(&data->lock);
}

1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
static int kmx61_suspend(struct device *dev)
{
	int ret;
	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));

	mutex_lock(&data->lock);
	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
			     false);
	mutex_unlock(&data->lock);

	return ret;
}

static int kmx61_resume(struct device *dev)
{
	u8 stby = 0;
	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));

	if (data->acc_stby)
		stby |= KMX61_ACC_STBY_BIT;
	if (data->mag_stby)
		stby |= KMX61_MAG_STBY_BIT;

	return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
}
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494

static int kmx61_runtime_suspend(struct device *dev)
{
	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
	int ret;

	mutex_lock(&data->lock);
	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
	mutex_unlock(&data->lock);

	return ret;
}

static int kmx61_runtime_resume(struct device *dev)
{
	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
	u8 stby = 0;

	if (!data->acc_ps)
		stby |= KMX61_ACC_STBY_BIT;
	if (!data->mag_ps)
		stby |= KMX61_MAG_STBY_BIT;

	return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
}

static const struct dev_pm_ops kmx61_pm_ops = {
1495 1496
	SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
	RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
1497 1498
};

1499 1500 1501 1502 1503 1504 1505
static const struct acpi_device_id kmx61_acpi_match[] = {
	{"KMX61021", 0},
	{}
};

MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);

1506
static const struct i2c_device_id kmx61_id[] = {
1507
	{ "kmx611021" },
1508 1509 1510 1511 1512 1513 1514 1515
	{}
};

MODULE_DEVICE_TABLE(i2c, kmx61_id);

static struct i2c_driver kmx61_driver = {
	.driver = {
		.name = KMX61_DRV_NAME,
1516
		.acpi_match_table = kmx61_acpi_match,
1517
		.pm = pm_ptr(&kmx61_pm_ops),
1518
	},
1519
	.probe		= kmx61_probe,
1520 1521 1522 1523 1524 1525 1526 1527 1528
	.remove		= kmx61_remove,
	.id_table	= kmx61_id,
};

module_i2c_driver(kmx61_driver);

MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver");
MODULE_LICENSE("GPL v2");