1 /* 2 * KMX61 - Kionix 6-axis Accelerometer/Magnetometer 3 * 4 * Copyright (c) 2014, Intel Corporation. 5 * 6 * This file is subject to the terms and conditions of version 2 of 7 * the GNU General Public License. See the file COPYING in the main 8 * directory of this archive for more details. 9 * 10 * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F). 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/i2c.h> 16 #include <linux/acpi.h> 17 #include <linux/gpio/consumer.h> 18 #include <linux/interrupt.h> 19 #include <linux/pm.h> 20 #include <linux/pm_runtime.h> 21 #include <linux/iio/iio.h> 22 #include <linux/iio/sysfs.h> 23 #include <linux/iio/events.h> 24 #include <linux/iio/trigger.h> 25 #include <linux/iio/buffer.h> 26 #include <linux/iio/triggered_buffer.h> 27 #include <linux/iio/trigger_consumer.h> 28 29 #define KMX61_DRV_NAME "kmx61" 30 #define KMX61_GPIO_NAME "kmx61_int" 31 #define KMX61_IRQ_NAME "kmx61_event" 32 33 #define KMX61_REG_WHO_AM_I 0x00 34 #define KMX61_REG_INS1 0x01 35 #define KMX61_REG_INS2 0x02 36 37 /* 38 * three 16-bit accelerometer output registers for X/Y/Z axis 39 * we use only XOUT_L as a base register, all other addresses 40 * can be obtained by applying an offset and are provided here 41 * only for clarity. 42 */ 43 #define KMX61_ACC_XOUT_L 0x0A 44 #define KMX61_ACC_XOUT_H 0x0B 45 #define KMX61_ACC_YOUT_L 0x0C 46 #define KMX61_ACC_YOUT_H 0x0D 47 #define KMX61_ACC_ZOUT_L 0x0E 48 #define KMX61_ACC_ZOUT_H 0x0F 49 50 /* 51 * one 16-bit temperature output register 52 */ 53 #define KMX61_TEMP_L 0x10 54 #define KMX61_TEMP_H 0x11 55 56 /* 57 * three 16-bit magnetometer output registers for X/Y/Z axis 58 */ 59 #define KMX61_MAG_XOUT_L 0x12 60 #define KMX61_MAG_XOUT_H 0x13 61 #define KMX61_MAG_YOUT_L 0x14 62 #define KMX61_MAG_YOUT_H 0x15 63 #define KMX61_MAG_ZOUT_L 0x16 64 #define KMX61_MAG_ZOUT_H 0x17 65 66 #define KMX61_REG_INL 0x28 67 #define KMX61_REG_STBY 0x29 68 #define KMX61_REG_CTRL1 0x2A 69 #define KMX61_REG_CTRL2 0x2B 70 #define KMX61_REG_ODCNTL 0x2C 71 #define KMX61_REG_INC1 0x2D 72 73 #define KMX61_REG_WUF_THRESH 0x3D 74 #define KMX61_REG_WUF_TIMER 0x3E 75 76 #define KMX61_ACC_STBY_BIT BIT(0) 77 #define KMX61_MAG_STBY_BIT BIT(1) 78 #define KMX61_ACT_STBY_BIT BIT(7) 79 80 #define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT) 81 82 #define KMX61_REG_INS1_BIT_WUFS BIT(1) 83 84 #define KMX61_REG_INS2_BIT_ZP BIT(0) 85 #define KMX61_REG_INS2_BIT_ZN BIT(1) 86 #define KMX61_REG_INS2_BIT_YP BIT(2) 87 #define KMX61_REG_INS2_BIT_YN BIT(3) 88 #define KMX61_REG_INS2_BIT_XP BIT(4) 89 #define KMX61_REG_INS2_BIT_XN BIT(5) 90 91 #define KMX61_REG_CTRL1_GSEL_MASK 0x03 92 93 #define KMX61_REG_CTRL1_BIT_RES BIT(4) 94 #define KMX61_REG_CTRL1_BIT_DRDYE BIT(5) 95 #define KMX61_REG_CTRL1_BIT_WUFE BIT(6) 96 #define KMX61_REG_CTRL1_BIT_BTSE BIT(7) 97 98 #define KMX61_REG_INC1_BIT_WUFS BIT(0) 99 #define KMX61_REG_INC1_BIT_DRDYM BIT(1) 100 #define KMX61_REG_INC1_BIT_DRDYA BIT(2) 101 #define KMX61_REG_INC1_BIT_IEN BIT(5) 102 103 #define KMX61_ACC_ODR_SHIFT 0 104 #define KMX61_MAG_ODR_SHIFT 4 105 #define KMX61_ACC_ODR_MASK 0x0F 106 #define KMX61_MAG_ODR_MASK 0xF0 107 108 #define KMX61_OWUF_MASK 0x7 109 110 #define KMX61_DEFAULT_WAKE_THRESH 1 111 #define KMX61_DEFAULT_WAKE_DURATION 1 112 113 #define KMX61_SLEEP_DELAY_MS 2000 114 115 #define KMX61_CHIP_ID 0x12 116 117 /* KMX61 devices */ 118 #define KMX61_ACC 0x01 119 #define KMX61_MAG 0x02 120 121 struct kmx61_data { 122 struct i2c_client *client; 123 124 /* serialize access to non-atomic ops, e.g set_mode */ 125 struct mutex lock; 126 127 /* standby state */ 128 bool acc_stby; 129 bool mag_stby; 130 131 /* power state */ 132 bool acc_ps; 133 bool mag_ps; 134 135 /* config bits */ 136 u8 range; 137 u8 odr_bits; 138 u8 wake_thresh; 139 u8 wake_duration; 140 141 /* accelerometer specific data */ 142 struct iio_dev *acc_indio_dev; 143 struct iio_trigger *acc_dready_trig; 144 struct iio_trigger *motion_trig; 145 bool acc_dready_trig_on; 146 bool motion_trig_on; 147 bool ev_enable_state; 148 149 /* magnetometer specific data */ 150 struct iio_dev *mag_indio_dev; 151 struct iio_trigger *mag_dready_trig; 152 bool mag_dready_trig_on; 153 }; 154 155 enum kmx61_range { 156 KMX61_RANGE_2G, 157 KMX61_RANGE_4G, 158 KMX61_RANGE_8G, 159 }; 160 161 enum kmx61_axis { 162 KMX61_AXIS_X, 163 KMX61_AXIS_Y, 164 KMX61_AXIS_Z, 165 }; 166 167 static const u16 kmx61_uscale_table[] = {9582, 19163, 38326}; 168 169 static const struct { 170 int val; 171 int val2; 172 } kmx61_samp_freq_table[] = { {12, 500000}, 173 {25, 0}, 174 {50, 0}, 175 {100, 0}, 176 {200, 0}, 177 {400, 0}, 178 {800, 0}, 179 {1600, 0}, 180 {0, 781000}, 181 {1, 563000}, 182 {3, 125000}, 183 {6, 250000} }; 184 185 static const struct { 186 int val; 187 int val2; 188 int odr_bits; 189 } kmx61_wake_up_odr_table[] = { {0, 781000, 0x00}, 190 {1, 563000, 0x01}, 191 {3, 125000, 0x02}, 192 {6, 250000, 0x03}, 193 {12, 500000, 0x04}, 194 {25, 0, 0x05}, 195 {50, 0, 0x06}, 196 {100, 0, 0x06}, 197 {200, 0, 0x06}, 198 {400, 0, 0x06}, 199 {800, 0, 0x06}, 200 {1600, 0, 0x06} }; 201 202 static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326"); 203 static IIO_CONST_ATTR(magn_scale_available, "0.001465"); 204 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( 205 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800"); 206 207 static struct attribute *kmx61_acc_attributes[] = { 208 &iio_const_attr_accel_scale_available.dev_attr.attr, 209 &iio_const_attr_sampling_frequency_available.dev_attr.attr, 210 NULL, 211 }; 212 213 static struct attribute *kmx61_mag_attributes[] = { 214 &iio_const_attr_magn_scale_available.dev_attr.attr, 215 &iio_const_attr_sampling_frequency_available.dev_attr.attr, 216 NULL, 217 }; 218 219 static const struct attribute_group kmx61_acc_attribute_group = { 220 .attrs = kmx61_acc_attributes, 221 }; 222 223 static const struct attribute_group kmx61_mag_attribute_group = { 224 .attrs = kmx61_mag_attributes, 225 }; 226 227 static const struct iio_event_spec kmx61_event = { 228 .type = IIO_EV_TYPE_THRESH, 229 .dir = IIO_EV_DIR_EITHER, 230 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 231 BIT(IIO_EV_INFO_ENABLE) | 232 BIT(IIO_EV_INFO_PERIOD), 233 }; 234 235 #define KMX61_ACC_CHAN(_axis) { \ 236 .type = IIO_ACCEL, \ 237 .modified = 1, \ 238 .channel2 = IIO_MOD_ ## _axis, \ 239 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 240 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ 241 BIT(IIO_CHAN_INFO_SAMP_FREQ), \ 242 .address = KMX61_ACC, \ 243 .scan_index = KMX61_AXIS_ ## _axis, \ 244 .scan_type = { \ 245 .sign = 's', \ 246 .realbits = 12, \ 247 .storagebits = 16, \ 248 .shift = 4, \ 249 .endianness = IIO_LE, \ 250 }, \ 251 .event_spec = &kmx61_event, \ 252 .num_event_specs = 1 \ 253 } 254 255 #define KMX61_MAG_CHAN(_axis) { \ 256 .type = IIO_MAGN, \ 257 .modified = 1, \ 258 .channel2 = IIO_MOD_ ## _axis, \ 259 .address = KMX61_MAG, \ 260 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 261 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ 262 BIT(IIO_CHAN_INFO_SAMP_FREQ), \ 263 .scan_index = KMX61_AXIS_ ## _axis, \ 264 .scan_type = { \ 265 .sign = 's', \ 266 .realbits = 14, \ 267 .storagebits = 16, \ 268 .shift = 2, \ 269 .endianness = IIO_LE, \ 270 }, \ 271 } 272 273 static const struct iio_chan_spec kmx61_acc_channels[] = { 274 KMX61_ACC_CHAN(X), 275 KMX61_ACC_CHAN(Y), 276 KMX61_ACC_CHAN(Z), 277 }; 278 279 static const struct iio_chan_spec kmx61_mag_channels[] = { 280 KMX61_MAG_CHAN(X), 281 KMX61_MAG_CHAN(Y), 282 KMX61_MAG_CHAN(Z), 283 }; 284 285 static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data) 286 { 287 struct kmx61_data **priv = iio_priv(indio_dev); 288 289 *priv = data; 290 } 291 292 static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev) 293 { 294 return *(struct kmx61_data **)iio_priv(indio_dev); 295 } 296 297 static int kmx61_convert_freq_to_bit(int val, int val2) 298 { 299 int i; 300 301 for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) 302 if (val == kmx61_samp_freq_table[i].val && 303 val2 == kmx61_samp_freq_table[i].val2) 304 return i; 305 return -EINVAL; 306 } 307 308 static int kmx61_convert_wake_up_odr_to_bit(int val, int val2) 309 { 310 int i; 311 312 for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i) 313 if (kmx61_wake_up_odr_table[i].val == val && 314 kmx61_wake_up_odr_table[i].val2 == val2) 315 return kmx61_wake_up_odr_table[i].odr_bits; 316 return -EINVAL; 317 } 318 319 /** 320 * kmx61_set_mode() - set KMX61 device operating mode 321 * @data - kmx61 device private data pointer 322 * @mode - bitmask, indicating operating mode for @device 323 * @device - bitmask, indicating device for which @mode needs to be set 324 * @update - update stby bits stored in device's private @data 325 * 326 * For each sensor (accelerometer/magnetometer) there are two operating modes 327 * STANDBY and OPERATION. Neither accel nor magn can be disabled independently 328 * if they are both enabled. Internal sensors state is saved in acc_stby and 329 * mag_stby members of driver's private @data. 330 */ 331 static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device, 332 bool update) 333 { 334 int ret; 335 int acc_stby = -1, mag_stby = -1; 336 337 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); 338 if (ret < 0) { 339 dev_err(&data->client->dev, "Error reading reg_stby\n"); 340 return ret; 341 } 342 if (device & KMX61_ACC) { 343 if (mode & KMX61_ACC_STBY_BIT) { 344 ret |= KMX61_ACC_STBY_BIT; 345 acc_stby = 1; 346 } else { 347 ret &= ~KMX61_ACC_STBY_BIT; 348 acc_stby = 0; 349 } 350 } 351 352 if (device & KMX61_MAG) { 353 if (mode & KMX61_MAG_STBY_BIT) { 354 ret |= KMX61_MAG_STBY_BIT; 355 mag_stby = 1; 356 } else { 357 ret &= ~KMX61_MAG_STBY_BIT; 358 mag_stby = 0; 359 } 360 } 361 362 if (mode & KMX61_ACT_STBY_BIT) 363 ret |= KMX61_ACT_STBY_BIT; 364 365 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret); 366 if (ret < 0) { 367 dev_err(&data->client->dev, "Error writing reg_stby\n"); 368 return ret; 369 } 370 371 if (acc_stby != -1 && update) 372 data->acc_stby = acc_stby; 373 if (mag_stby != -1 && update) 374 data->mag_stby = mag_stby; 375 376 return 0; 377 } 378 379 static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device) 380 { 381 int ret; 382 383 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); 384 if (ret < 0) { 385 dev_err(&data->client->dev, "Error reading reg_stby\n"); 386 return ret; 387 } 388 *mode = 0; 389 390 if (device & KMX61_ACC) { 391 if (ret & KMX61_ACC_STBY_BIT) 392 *mode |= KMX61_ACC_STBY_BIT; 393 else 394 *mode &= ~KMX61_ACC_STBY_BIT; 395 } 396 397 if (device & KMX61_MAG) { 398 if (ret & KMX61_MAG_STBY_BIT) 399 *mode |= KMX61_MAG_STBY_BIT; 400 else 401 *mode &= ~KMX61_MAG_STBY_BIT; 402 } 403 404 return 0; 405 } 406 407 static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2) 408 { 409 int ret, odr_bits; 410 411 odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2); 412 if (odr_bits < 0) 413 return odr_bits; 414 415 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2, 416 odr_bits); 417 if (ret < 0) 418 dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); 419 return ret; 420 } 421 422 static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device) 423 { 424 int ret; 425 u8 mode; 426 int lodr_bits, odr_bits; 427 428 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); 429 if (ret < 0) 430 return ret; 431 432 lodr_bits = kmx61_convert_freq_to_bit(val, val2); 433 if (lodr_bits < 0) 434 return lodr_bits; 435 436 /* To change ODR, accel and magn must be in STDBY */ 437 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, 438 true); 439 if (ret < 0) 440 return ret; 441 442 odr_bits = 0; 443 if (device & KMX61_ACC) 444 odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT; 445 if (device & KMX61_MAG) 446 odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT; 447 448 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL, 449 odr_bits); 450 if (ret < 0) 451 return ret; 452 453 data->odr_bits = odr_bits; 454 455 if (device & KMX61_ACC) { 456 ret = kmx61_set_wake_up_odr(data, val, val2); 457 if (ret) 458 return ret; 459 } 460 461 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); 462 } 463 464 static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2, 465 u8 device) 466 { 467 u8 lodr_bits; 468 469 if (device & KMX61_ACC) 470 lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) & 471 KMX61_ACC_ODR_MASK; 472 else if (device & KMX61_MAG) 473 lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) & 474 KMX61_MAG_ODR_MASK; 475 else 476 return -EINVAL; 477 478 if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table)) 479 return -EINVAL; 480 481 *val = kmx61_samp_freq_table[lodr_bits].val; 482 *val2 = kmx61_samp_freq_table[lodr_bits].val2; 483 484 return 0; 485 } 486 487 static int kmx61_set_range(struct kmx61_data *data, u8 range) 488 { 489 int ret; 490 491 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); 492 if (ret < 0) { 493 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 494 return ret; 495 } 496 497 ret &= ~KMX61_REG_CTRL1_GSEL_MASK; 498 ret |= range & KMX61_REG_CTRL1_GSEL_MASK; 499 500 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); 501 if (ret < 0) { 502 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 503 return ret; 504 } 505 506 data->range = range; 507 508 return 0; 509 } 510 511 static int kmx61_set_scale(struct kmx61_data *data, u16 uscale) 512 { 513 int ret, i; 514 u8 mode; 515 516 for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) { 517 if (kmx61_uscale_table[i] == uscale) { 518 ret = kmx61_get_mode(data, &mode, 519 KMX61_ACC | KMX61_MAG); 520 if (ret < 0) 521 return ret; 522 523 ret = kmx61_set_mode(data, KMX61_ALL_STBY, 524 KMX61_ACC | KMX61_MAG, true); 525 if (ret < 0) 526 return ret; 527 528 ret = kmx61_set_range(data, i); 529 if (ret < 0) 530 return ret; 531 532 return kmx61_set_mode(data, mode, 533 KMX61_ACC | KMX61_MAG, true); 534 } 535 } 536 return -EINVAL; 537 } 538 539 static int kmx61_chip_init(struct kmx61_data *data) 540 { 541 int ret, val, val2; 542 543 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I); 544 if (ret < 0) { 545 dev_err(&data->client->dev, "Error reading who_am_i\n"); 546 return ret; 547 } 548 549 if (ret != KMX61_CHIP_ID) { 550 dev_err(&data->client->dev, 551 "Wrong chip id, got %x expected %x\n", 552 ret, KMX61_CHIP_ID); 553 return -EINVAL; 554 } 555 556 /* set accel 12bit, 4g range */ 557 ret = kmx61_set_range(data, KMX61_RANGE_4G); 558 if (ret < 0) 559 return ret; 560 561 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL); 562 if (ret < 0) { 563 dev_err(&data->client->dev, "Error reading reg_odcntl\n"); 564 return ret; 565 } 566 data->odr_bits = ret; 567 568 /* 569 * set output data rate for wake up (motion detection) function 570 * to match data rate for accelerometer sampling 571 */ 572 ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC); 573 if (ret < 0) 574 return ret; 575 576 ret = kmx61_set_wake_up_odr(data, val, val2); 577 if (ret < 0) 578 return ret; 579 580 /* set acc/magn to OPERATION mode */ 581 ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true); 582 if (ret < 0) 583 return ret; 584 585 data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH; 586 data->wake_duration = KMX61_DEFAULT_WAKE_DURATION; 587 588 return 0; 589 } 590 591 static int kmx61_setup_new_data_interrupt(struct kmx61_data *data, 592 bool status, u8 device) 593 { 594 u8 mode; 595 int ret; 596 597 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); 598 if (ret < 0) 599 return ret; 600 601 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); 602 if (ret < 0) 603 return ret; 604 605 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); 606 if (ret < 0) { 607 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 608 return ret; 609 } 610 611 if (status) { 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 } else { 618 ret &= ~KMX61_REG_INC1_BIT_IEN; 619 if (device & KMX61_ACC) 620 ret &= ~KMX61_REG_INC1_BIT_DRDYA; 621 if (device & KMX61_MAG) 622 ret &= ~KMX61_REG_INC1_BIT_DRDYM; 623 } 624 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); 625 if (ret < 0) { 626 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); 627 return ret; 628 } 629 630 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); 631 if (ret < 0) { 632 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 633 return ret; 634 } 635 636 if (status) 637 ret |= KMX61_REG_CTRL1_BIT_DRDYE; 638 else 639 ret &= ~KMX61_REG_CTRL1_BIT_DRDYE; 640 641 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); 642 if (ret < 0) { 643 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 644 return ret; 645 } 646 647 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); 648 } 649 650 static int kmx61_chip_update_thresholds(struct kmx61_data *data) 651 { 652 int ret; 653 654 ret = i2c_smbus_write_byte_data(data->client, 655 KMX61_REG_WUF_TIMER, 656 data->wake_duration); 657 if (ret < 0) { 658 dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n"); 659 return ret; 660 } 661 662 ret = i2c_smbus_write_byte_data(data->client, 663 KMX61_REG_WUF_THRESH, 664 data->wake_thresh); 665 if (ret < 0) 666 dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n"); 667 668 return ret; 669 } 670 671 static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data, 672 bool status) 673 { 674 u8 mode; 675 int ret; 676 677 ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); 678 if (ret < 0) 679 return ret; 680 681 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); 682 if (ret < 0) 683 return ret; 684 685 ret = kmx61_chip_update_thresholds(data); 686 if (ret < 0) 687 return ret; 688 689 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); 690 if (ret < 0) { 691 dev_err(&data->client->dev, "Error reading reg_inc1\n"); 692 return ret; 693 } 694 if (status) 695 ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); 696 else 697 ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); 698 699 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); 700 if (ret < 0) { 701 dev_err(&data->client->dev, "Error writing reg_inc1\n"); 702 return ret; 703 } 704 705 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); 706 if (ret < 0) { 707 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 708 return ret; 709 } 710 711 if (status) 712 ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE; 713 else 714 ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE); 715 716 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); 717 if (ret < 0) { 718 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 719 return ret; 720 } 721 mode |= KMX61_ACT_STBY_BIT; 722 return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); 723 } 724 725 /** 726 * kmx61_set_power_state() - set power state for kmx61 @device 727 * @data - kmx61 device private pointer 728 * @on - power state to be set for @device 729 * @device - bitmask indicating device for which @on state needs to be set 730 * 731 * Notice that when ACC power state needs to be set to ON and MAG is in 732 * OPERATION then we know that kmx61_runtime_resume was already called 733 * so we must set ACC OPERATION mode here. The same happens when MAG power 734 * state needs to be set to ON and ACC is in OPERATION. 735 */ 736 static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device) 737 { 738 #ifdef CONFIG_PM 739 int ret; 740 741 if (device & KMX61_ACC) { 742 if (on && !data->acc_ps && !data->mag_stby) { 743 ret = kmx61_set_mode(data, 0, KMX61_ACC, true); 744 if (ret < 0) 745 return ret; 746 } 747 data->acc_ps = on; 748 } 749 if (device & KMX61_MAG) { 750 if (on && !data->mag_ps && !data->acc_stby) { 751 ret = kmx61_set_mode(data, 0, KMX61_MAG, true); 752 if (ret < 0) 753 return ret; 754 } 755 data->mag_ps = on; 756 } 757 758 if (on) { 759 ret = pm_runtime_get_sync(&data->client->dev); 760 } else { 761 pm_runtime_mark_last_busy(&data->client->dev); 762 ret = pm_runtime_put_autosuspend(&data->client->dev); 763 } 764 if (ret < 0) { 765 dev_err(&data->client->dev, 766 "Failed: kmx61_set_power_state for %d, ret %d\n", 767 on, ret); 768 if (on) 769 pm_runtime_put_noidle(&data->client->dev); 770 771 return ret; 772 } 773 #endif 774 return 0; 775 } 776 777 static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset) 778 { 779 int ret; 780 u8 reg = base + offset * 2; 781 782 ret = i2c_smbus_read_word_data(data->client, reg); 783 if (ret < 0) 784 dev_err(&data->client->dev, "failed to read reg at %x\n", reg); 785 786 return ret; 787 } 788 789 static int kmx61_read_raw(struct iio_dev *indio_dev, 790 struct iio_chan_spec const *chan, int *val, 791 int *val2, long mask) 792 { 793 int ret; 794 u8 base_reg; 795 struct kmx61_data *data = kmx61_get_data(indio_dev); 796 797 switch (mask) { 798 case IIO_CHAN_INFO_RAW: 799 switch (chan->type) { 800 case IIO_ACCEL: 801 base_reg = KMX61_ACC_XOUT_L; 802 break; 803 case IIO_MAGN: 804 base_reg = KMX61_MAG_XOUT_L; 805 break; 806 default: 807 return -EINVAL; 808 } 809 mutex_lock(&data->lock); 810 811 ret = kmx61_set_power_state(data, true, chan->address); 812 if (ret) { 813 mutex_unlock(&data->lock); 814 return ret; 815 } 816 817 ret = kmx61_read_measurement(data, base_reg, chan->scan_index); 818 if (ret < 0) { 819 kmx61_set_power_state(data, false, chan->address); 820 mutex_unlock(&data->lock); 821 return ret; 822 } 823 *val = sign_extend32(ret >> chan->scan_type.shift, 824 chan->scan_type.realbits - 1); 825 ret = kmx61_set_power_state(data, false, chan->address); 826 827 mutex_unlock(&data->lock); 828 if (ret) 829 return ret; 830 return IIO_VAL_INT; 831 case IIO_CHAN_INFO_SCALE: 832 switch (chan->type) { 833 case IIO_ACCEL: 834 *val = 0; 835 *val2 = kmx61_uscale_table[data->range]; 836 return IIO_VAL_INT_PLUS_MICRO; 837 case IIO_MAGN: 838 /* 14 bits res, 1465 microGauss per magn count */ 839 *val = 0; 840 *val2 = 1465; 841 return IIO_VAL_INT_PLUS_MICRO; 842 default: 843 return -EINVAL; 844 } 845 case IIO_CHAN_INFO_SAMP_FREQ: 846 if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) 847 return -EINVAL; 848 849 mutex_lock(&data->lock); 850 ret = kmx61_get_odr(data, val, val2, chan->address); 851 mutex_unlock(&data->lock); 852 if (ret) 853 return -EINVAL; 854 return IIO_VAL_INT_PLUS_MICRO; 855 } 856 return -EINVAL; 857 } 858 859 static int kmx61_write_raw(struct iio_dev *indio_dev, 860 struct iio_chan_spec const *chan, int val, 861 int val2, long mask) 862 { 863 int ret; 864 struct kmx61_data *data = kmx61_get_data(indio_dev); 865 866 switch (mask) { 867 case IIO_CHAN_INFO_SAMP_FREQ: 868 if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) 869 return -EINVAL; 870 871 mutex_lock(&data->lock); 872 ret = kmx61_set_odr(data, val, val2, chan->address); 873 mutex_unlock(&data->lock); 874 return ret; 875 case IIO_CHAN_INFO_SCALE: 876 switch (chan->type) { 877 case IIO_ACCEL: 878 if (val != 0) 879 return -EINVAL; 880 mutex_lock(&data->lock); 881 ret = kmx61_set_scale(data, val2); 882 mutex_unlock(&data->lock); 883 return ret; 884 default: 885 return -EINVAL; 886 } 887 default: 888 return -EINVAL; 889 } 890 } 891 892 static int kmx61_read_event(struct iio_dev *indio_dev, 893 const struct iio_chan_spec *chan, 894 enum iio_event_type type, 895 enum iio_event_direction dir, 896 enum iio_event_info info, 897 int *val, int *val2) 898 { 899 struct kmx61_data *data = kmx61_get_data(indio_dev); 900 901 *val2 = 0; 902 switch (info) { 903 case IIO_EV_INFO_VALUE: 904 *val = data->wake_thresh; 905 return IIO_VAL_INT; 906 case IIO_EV_INFO_PERIOD: 907 *val = data->wake_duration; 908 return IIO_VAL_INT; 909 default: 910 return -EINVAL; 911 } 912 } 913 914 static int kmx61_write_event(struct iio_dev *indio_dev, 915 const struct iio_chan_spec *chan, 916 enum iio_event_type type, 917 enum iio_event_direction dir, 918 enum iio_event_info info, 919 int val, int val2) 920 { 921 struct kmx61_data *data = kmx61_get_data(indio_dev); 922 923 if (data->ev_enable_state) 924 return -EBUSY; 925 926 switch (info) { 927 case IIO_EV_INFO_VALUE: 928 data->wake_thresh = val; 929 return IIO_VAL_INT; 930 case IIO_EV_INFO_PERIOD: 931 data->wake_duration = val; 932 return IIO_VAL_INT; 933 default: 934 return -EINVAL; 935 } 936 } 937 938 static int kmx61_read_event_config(struct iio_dev *indio_dev, 939 const struct iio_chan_spec *chan, 940 enum iio_event_type type, 941 enum iio_event_direction dir) 942 { 943 struct kmx61_data *data = kmx61_get_data(indio_dev); 944 945 return data->ev_enable_state; 946 } 947 948 static int kmx61_write_event_config(struct iio_dev *indio_dev, 949 const struct iio_chan_spec *chan, 950 enum iio_event_type type, 951 enum iio_event_direction dir, 952 int state) 953 { 954 struct kmx61_data *data = kmx61_get_data(indio_dev); 955 int ret = 0; 956 957 if (state && data->ev_enable_state) 958 return 0; 959 960 mutex_lock(&data->lock); 961 962 if (!state && data->motion_trig_on) { 963 data->ev_enable_state = false; 964 goto err_unlock; 965 } 966 967 ret = kmx61_set_power_state(data, state, KMX61_ACC); 968 if (ret < 0) 969 goto err_unlock; 970 971 ret = kmx61_setup_any_motion_interrupt(data, state); 972 if (ret < 0) { 973 kmx61_set_power_state(data, false, KMX61_ACC); 974 goto err_unlock; 975 } 976 977 data->ev_enable_state = state; 978 979 err_unlock: 980 mutex_unlock(&data->lock); 981 982 return ret; 983 } 984 985 static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev, 986 struct iio_trigger *trig) 987 { 988 struct kmx61_data *data = kmx61_get_data(indio_dev); 989 990 if (data->acc_dready_trig != trig && data->motion_trig != trig) 991 return -EINVAL; 992 993 return 0; 994 } 995 996 static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev, 997 struct iio_trigger *trig) 998 { 999 struct kmx61_data *data = kmx61_get_data(indio_dev); 1000 1001 if (data->mag_dready_trig != trig) 1002 return -EINVAL; 1003 1004 return 0; 1005 } 1006 1007 static const struct iio_info kmx61_acc_info = { 1008 .driver_module = THIS_MODULE, 1009 .read_raw = kmx61_read_raw, 1010 .write_raw = kmx61_write_raw, 1011 .attrs = &kmx61_acc_attribute_group, 1012 .read_event_value = kmx61_read_event, 1013 .write_event_value = kmx61_write_event, 1014 .read_event_config = kmx61_read_event_config, 1015 .write_event_config = kmx61_write_event_config, 1016 .validate_trigger = kmx61_acc_validate_trigger, 1017 }; 1018 1019 static const struct iio_info kmx61_mag_info = { 1020 .driver_module = THIS_MODULE, 1021 .read_raw = kmx61_read_raw, 1022 .write_raw = kmx61_write_raw, 1023 .attrs = &kmx61_mag_attribute_group, 1024 .validate_trigger = kmx61_mag_validate_trigger, 1025 }; 1026 1027 1028 static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig, 1029 bool state) 1030 { 1031 int ret = 0; 1032 u8 device; 1033 1034 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 1035 struct kmx61_data *data = kmx61_get_data(indio_dev); 1036 1037 mutex_lock(&data->lock); 1038 1039 if (!state && data->ev_enable_state && data->motion_trig_on) { 1040 data->motion_trig_on = false; 1041 goto err_unlock; 1042 } 1043 1044 if (data->acc_dready_trig == trig || data->motion_trig == trig) 1045 device = KMX61_ACC; 1046 else 1047 device = KMX61_MAG; 1048 1049 ret = kmx61_set_power_state(data, state, device); 1050 if (ret < 0) 1051 goto err_unlock; 1052 1053 if (data->acc_dready_trig == trig || data->mag_dready_trig == trig) 1054 ret = kmx61_setup_new_data_interrupt(data, state, device); 1055 else 1056 ret = kmx61_setup_any_motion_interrupt(data, state); 1057 if (ret < 0) { 1058 kmx61_set_power_state(data, false, device); 1059 goto err_unlock; 1060 } 1061 1062 if (data->acc_dready_trig == trig) 1063 data->acc_dready_trig_on = state; 1064 else if (data->mag_dready_trig == trig) 1065 data->mag_dready_trig_on = state; 1066 else 1067 data->motion_trig_on = state; 1068 err_unlock: 1069 mutex_unlock(&data->lock); 1070 1071 return ret; 1072 } 1073 1074 static int kmx61_trig_try_reenable(struct iio_trigger *trig) 1075 { 1076 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 1077 struct kmx61_data *data = kmx61_get_data(indio_dev); 1078 int ret; 1079 1080 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); 1081 if (ret < 0) { 1082 dev_err(&data->client->dev, "Error reading reg_inl\n"); 1083 return ret; 1084 } 1085 1086 return 0; 1087 } 1088 1089 static const struct iio_trigger_ops kmx61_trigger_ops = { 1090 .set_trigger_state = kmx61_data_rdy_trigger_set_state, 1091 .try_reenable = kmx61_trig_try_reenable, 1092 .owner = THIS_MODULE, 1093 }; 1094 1095 static irqreturn_t kmx61_event_handler(int irq, void *private) 1096 { 1097 struct kmx61_data *data = private; 1098 struct iio_dev *indio_dev = data->acc_indio_dev; 1099 int ret; 1100 1101 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1); 1102 if (ret < 0) { 1103 dev_err(&data->client->dev, "Error reading reg_ins1\n"); 1104 goto ack_intr; 1105 } 1106 1107 if (ret & KMX61_REG_INS1_BIT_WUFS) { 1108 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2); 1109 if (ret < 0) { 1110 dev_err(&data->client->dev, "Error reading reg_ins2\n"); 1111 goto ack_intr; 1112 } 1113 1114 if (ret & KMX61_REG_INS2_BIT_XN) 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_FALLING), 1121 0); 1122 1123 if (ret & KMX61_REG_INS2_BIT_XP) 1124 iio_push_event(indio_dev, 1125 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1126 0, 1127 IIO_MOD_X, 1128 IIO_EV_TYPE_THRESH, 1129 IIO_EV_DIR_RISING), 1130 0); 1131 1132 if (ret & KMX61_REG_INS2_BIT_YN) 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_FALLING), 1139 0); 1140 1141 if (ret & KMX61_REG_INS2_BIT_YP) 1142 iio_push_event(indio_dev, 1143 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1144 0, 1145 IIO_MOD_Y, 1146 IIO_EV_TYPE_THRESH, 1147 IIO_EV_DIR_RISING), 1148 0); 1149 1150 if (ret & KMX61_REG_INS2_BIT_ZN) 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_FALLING), 1157 0); 1158 1159 if (ret & KMX61_REG_INS2_BIT_ZP) 1160 iio_push_event(indio_dev, 1161 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1162 0, 1163 IIO_MOD_Z, 1164 IIO_EV_TYPE_THRESH, 1165 IIO_EV_DIR_RISING), 1166 0); 1167 } 1168 1169 ack_intr: 1170 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); 1171 if (ret < 0) 1172 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 1173 1174 ret |= KMX61_REG_CTRL1_BIT_RES; 1175 ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); 1176 if (ret < 0) 1177 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 1178 1179 ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); 1180 if (ret < 0) 1181 dev_err(&data->client->dev, "Error reading reg_inl\n"); 1182 1183 return IRQ_HANDLED; 1184 } 1185 1186 static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private) 1187 { 1188 struct kmx61_data *data = private; 1189 1190 if (data->acc_dready_trig_on) 1191 iio_trigger_poll(data->acc_dready_trig); 1192 if (data->mag_dready_trig_on) 1193 iio_trigger_poll(data->mag_dready_trig); 1194 1195 if (data->motion_trig_on) 1196 iio_trigger_poll(data->motion_trig); 1197 1198 if (data->ev_enable_state) 1199 return IRQ_WAKE_THREAD; 1200 return IRQ_HANDLED; 1201 } 1202 1203 static irqreturn_t kmx61_trigger_handler(int irq, void *p) 1204 { 1205 struct iio_poll_func *pf = p; 1206 struct iio_dev *indio_dev = pf->indio_dev; 1207 struct kmx61_data *data = kmx61_get_data(indio_dev); 1208 int bit, ret, i = 0; 1209 u8 base; 1210 s16 buffer[8]; 1211 1212 if (indio_dev == data->acc_indio_dev) 1213 base = KMX61_ACC_XOUT_L; 1214 else 1215 base = KMX61_MAG_XOUT_L; 1216 1217 mutex_lock(&data->lock); 1218 for_each_set_bit(bit, indio_dev->active_scan_mask, 1219 indio_dev->masklength) { 1220 ret = kmx61_read_measurement(data, base, bit); 1221 if (ret < 0) { 1222 mutex_unlock(&data->lock); 1223 goto err; 1224 } 1225 buffer[i++] = ret; 1226 } 1227 mutex_unlock(&data->lock); 1228 1229 iio_push_to_buffers(indio_dev, buffer); 1230 err: 1231 iio_trigger_notify_done(indio_dev->trig); 1232 1233 return IRQ_HANDLED; 1234 } 1235 1236 static const char *kmx61_match_acpi_device(struct device *dev) 1237 { 1238 const struct acpi_device_id *id; 1239 1240 id = acpi_match_device(dev->driver->acpi_match_table, dev); 1241 if (!id) 1242 return NULL; 1243 return dev_name(dev); 1244 } 1245 1246 static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data) 1247 { 1248 struct device *dev; 1249 struct gpio_desc *gpio; 1250 int ret; 1251 1252 if (!client) 1253 return -EINVAL; 1254 1255 dev = &client->dev; 1256 1257 /* data ready gpio interrupt pin */ 1258 gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0, GPIOD_IN); 1259 if (IS_ERR(gpio)) { 1260 dev_err(dev, "acpi gpio get index failed\n"); 1261 return PTR_ERR(gpio); 1262 } 1263 1264 ret = gpiod_to_irq(gpio); 1265 1266 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); 1267 return ret; 1268 } 1269 1270 static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data, 1271 const struct iio_info *info, 1272 const struct iio_chan_spec *chan, 1273 int num_channels, 1274 const char *name) 1275 { 1276 struct iio_dev *indio_dev; 1277 1278 indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data)); 1279 if (!indio_dev) 1280 return ERR_PTR(-ENOMEM); 1281 1282 kmx61_set_data(indio_dev, data); 1283 1284 indio_dev->dev.parent = &data->client->dev; 1285 indio_dev->channels = chan; 1286 indio_dev->num_channels = num_channels; 1287 indio_dev->name = name; 1288 indio_dev->modes = INDIO_DIRECT_MODE; 1289 indio_dev->info = info; 1290 1291 return indio_dev; 1292 } 1293 1294 static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data, 1295 struct iio_dev *indio_dev, 1296 const char *tag) 1297 { 1298 struct iio_trigger *trig; 1299 int ret; 1300 1301 trig = devm_iio_trigger_alloc(&data->client->dev, 1302 "%s-%s-dev%d", 1303 indio_dev->name, 1304 tag, 1305 indio_dev->id); 1306 if (!trig) 1307 return ERR_PTR(-ENOMEM); 1308 1309 trig->dev.parent = &data->client->dev; 1310 trig->ops = &kmx61_trigger_ops; 1311 iio_trigger_set_drvdata(trig, indio_dev); 1312 1313 ret = iio_trigger_register(trig); 1314 if (ret) 1315 return ERR_PTR(ret); 1316 1317 return trig; 1318 } 1319 1320 static int kmx61_probe(struct i2c_client *client, 1321 const struct i2c_device_id *id) 1322 { 1323 int ret; 1324 struct kmx61_data *data; 1325 const char *name = NULL; 1326 1327 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 1328 if (!data) 1329 return -ENOMEM; 1330 1331 i2c_set_clientdata(client, data); 1332 data->client = client; 1333 1334 mutex_init(&data->lock); 1335 1336 if (id) 1337 name = id->name; 1338 else if (ACPI_HANDLE(&client->dev)) 1339 name = kmx61_match_acpi_device(&client->dev); 1340 else 1341 return -ENODEV; 1342 1343 data->acc_indio_dev = 1344 kmx61_indiodev_setup(data, &kmx61_acc_info, 1345 kmx61_acc_channels, 1346 ARRAY_SIZE(kmx61_acc_channels), 1347 name); 1348 if (IS_ERR(data->acc_indio_dev)) 1349 return PTR_ERR(data->acc_indio_dev); 1350 1351 data->mag_indio_dev = 1352 kmx61_indiodev_setup(data, &kmx61_mag_info, 1353 kmx61_mag_channels, 1354 ARRAY_SIZE(kmx61_mag_channels), 1355 name); 1356 if (IS_ERR(data->mag_indio_dev)) 1357 return PTR_ERR(data->mag_indio_dev); 1358 1359 ret = kmx61_chip_init(data); 1360 if (ret < 0) 1361 return ret; 1362 1363 if (client->irq < 0) 1364 client->irq = kmx61_gpio_probe(client, data); 1365 1366 if (client->irq > 0) { 1367 ret = devm_request_threaded_irq(&client->dev, client->irq, 1368 kmx61_data_rdy_trig_poll, 1369 kmx61_event_handler, 1370 IRQF_TRIGGER_RISING, 1371 KMX61_IRQ_NAME, 1372 data); 1373 if (ret) 1374 goto err_chip_uninit; 1375 1376 data->acc_dready_trig = 1377 kmx61_trigger_setup(data, data->acc_indio_dev, 1378 "dready"); 1379 if (IS_ERR(data->acc_dready_trig)) { 1380 ret = PTR_ERR(data->acc_dready_trig); 1381 goto err_chip_uninit; 1382 } 1383 1384 data->mag_dready_trig = 1385 kmx61_trigger_setup(data, data->mag_indio_dev, 1386 "dready"); 1387 if (IS_ERR(data->mag_dready_trig)) { 1388 ret = PTR_ERR(data->mag_dready_trig); 1389 goto err_trigger_unregister_acc_dready; 1390 } 1391 1392 data->motion_trig = 1393 kmx61_trigger_setup(data, data->acc_indio_dev, 1394 "any-motion"); 1395 if (IS_ERR(data->motion_trig)) { 1396 ret = PTR_ERR(data->motion_trig); 1397 goto err_trigger_unregister_mag_dready; 1398 } 1399 1400 ret = iio_triggered_buffer_setup(data->acc_indio_dev, 1401 &iio_pollfunc_store_time, 1402 kmx61_trigger_handler, 1403 NULL); 1404 if (ret < 0) { 1405 dev_err(&data->client->dev, 1406 "Failed to setup acc triggered buffer\n"); 1407 goto err_trigger_unregister_motion; 1408 } 1409 1410 ret = iio_triggered_buffer_setup(data->mag_indio_dev, 1411 &iio_pollfunc_store_time, 1412 kmx61_trigger_handler, 1413 NULL); 1414 if (ret < 0) { 1415 dev_err(&data->client->dev, 1416 "Failed to setup mag triggered buffer\n"); 1417 goto err_buffer_cleanup_acc; 1418 } 1419 } 1420 1421 ret = iio_device_register(data->acc_indio_dev); 1422 if (ret < 0) { 1423 dev_err(&client->dev, "Failed to register acc iio device\n"); 1424 goto err_buffer_cleanup_mag; 1425 } 1426 1427 ret = iio_device_register(data->mag_indio_dev); 1428 if (ret < 0) { 1429 dev_err(&client->dev, "Failed to register mag iio device\n"); 1430 goto err_iio_unregister_acc; 1431 } 1432 1433 ret = pm_runtime_set_active(&client->dev); 1434 if (ret < 0) 1435 goto err_iio_unregister_mag; 1436 1437 pm_runtime_enable(&client->dev); 1438 pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS); 1439 pm_runtime_use_autosuspend(&client->dev); 1440 1441 return 0; 1442 1443 err_iio_unregister_mag: 1444 iio_device_unregister(data->mag_indio_dev); 1445 err_iio_unregister_acc: 1446 iio_device_unregister(data->acc_indio_dev); 1447 err_buffer_cleanup_mag: 1448 if (client->irq > 0) 1449 iio_triggered_buffer_cleanup(data->mag_indio_dev); 1450 err_buffer_cleanup_acc: 1451 if (client->irq > 0) 1452 iio_triggered_buffer_cleanup(data->acc_indio_dev); 1453 err_trigger_unregister_motion: 1454 iio_trigger_unregister(data->motion_trig); 1455 err_trigger_unregister_mag_dready: 1456 iio_trigger_unregister(data->mag_dready_trig); 1457 err_trigger_unregister_acc_dready: 1458 iio_trigger_unregister(data->acc_dready_trig); 1459 err_chip_uninit: 1460 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); 1461 return ret; 1462 } 1463 1464 static int kmx61_remove(struct i2c_client *client) 1465 { 1466 struct kmx61_data *data = i2c_get_clientdata(client); 1467 1468 pm_runtime_disable(&client->dev); 1469 pm_runtime_set_suspended(&client->dev); 1470 pm_runtime_put_noidle(&client->dev); 1471 1472 iio_device_unregister(data->acc_indio_dev); 1473 iio_device_unregister(data->mag_indio_dev); 1474 1475 if (client->irq > 0) { 1476 iio_triggered_buffer_cleanup(data->acc_indio_dev); 1477 iio_triggered_buffer_cleanup(data->mag_indio_dev); 1478 iio_trigger_unregister(data->acc_dready_trig); 1479 iio_trigger_unregister(data->mag_dready_trig); 1480 iio_trigger_unregister(data->motion_trig); 1481 } 1482 1483 mutex_lock(&data->lock); 1484 kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); 1485 mutex_unlock(&data->lock); 1486 1487 return 0; 1488 } 1489 1490 #ifdef CONFIG_PM_SLEEP 1491 static int kmx61_suspend(struct device *dev) 1492 { 1493 int ret; 1494 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); 1495 1496 mutex_lock(&data->lock); 1497 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, 1498 false); 1499 mutex_unlock(&data->lock); 1500 1501 return ret; 1502 } 1503 1504 static int kmx61_resume(struct device *dev) 1505 { 1506 u8 stby = 0; 1507 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); 1508 1509 if (data->acc_stby) 1510 stby |= KMX61_ACC_STBY_BIT; 1511 if (data->mag_stby) 1512 stby |= KMX61_MAG_STBY_BIT; 1513 1514 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); 1515 } 1516 #endif 1517 1518 #ifdef CONFIG_PM 1519 static int kmx61_runtime_suspend(struct device *dev) 1520 { 1521 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); 1522 int ret; 1523 1524 mutex_lock(&data->lock); 1525 ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); 1526 mutex_unlock(&data->lock); 1527 1528 return ret; 1529 } 1530 1531 static int kmx61_runtime_resume(struct device *dev) 1532 { 1533 struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); 1534 u8 stby = 0; 1535 1536 if (!data->acc_ps) 1537 stby |= KMX61_ACC_STBY_BIT; 1538 if (!data->mag_ps) 1539 stby |= KMX61_MAG_STBY_BIT; 1540 1541 return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); 1542 } 1543 #endif 1544 1545 static const struct dev_pm_ops kmx61_pm_ops = { 1546 SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume) 1547 SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL) 1548 }; 1549 1550 static const struct acpi_device_id kmx61_acpi_match[] = { 1551 {"KMX61021", 0}, 1552 {} 1553 }; 1554 1555 MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match); 1556 1557 static const struct i2c_device_id kmx61_id[] = { 1558 {"kmx611021", 0}, 1559 {} 1560 }; 1561 1562 MODULE_DEVICE_TABLE(i2c, kmx61_id); 1563 1564 static struct i2c_driver kmx61_driver = { 1565 .driver = { 1566 .name = KMX61_DRV_NAME, 1567 .acpi_match_table = ACPI_PTR(kmx61_acpi_match), 1568 .pm = &kmx61_pm_ops, 1569 }, 1570 .probe = kmx61_probe, 1571 .remove = kmx61_remove, 1572 .id_table = kmx61_id, 1573 }; 1574 1575 module_i2c_driver(kmx61_driver); 1576 1577 MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); 1578 MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver"); 1579 MODULE_LICENSE("GPL v2"); 1580