1 // SPDX-License-Identifier: GPL-2.0-only 2 /* ADC driver for AXP20X and AXP22X PMICs 3 * 4 * Copyright (c) 2016 Free Electrons NextThing Co. 5 * Quentin Schulz <quentin.schulz@free-electrons.com> 6 */ 7 8 #include <linux/bitfield.h> 9 #include <linux/completion.h> 10 #include <linux/interrupt.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/mod_devicetable.h> 14 #include <linux/platform_device.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/property.h> 17 #include <linux/regmap.h> 18 #include <linux/thermal.h> 19 20 #include <linux/iio/iio.h> 21 #include <linux/iio/driver.h> 22 #include <linux/iio/machine.h> 23 #include <linux/mfd/axp20x.h> 24 25 #define AXP20X_ADC_EN1_MASK GENMASK(7, 0) 26 #define AXP20X_ADC_EN2_MASK (GENMASK(3, 2) | BIT(7)) 27 28 #define AXP22X_ADC_EN1_MASK (GENMASK(7, 5) | BIT(0)) 29 30 #define AXP20X_GPIO10_IN_RANGE_GPIO0 BIT(0) 31 #define AXP20X_GPIO10_IN_RANGE_GPIO1 BIT(1) 32 33 #define AXP20X_ADC_RATE_MASK GENMASK(7, 6) 34 #define AXP20X_ADC_RATE_HZ(x) ((ilog2((x) / 25) << 6) & AXP20X_ADC_RATE_MASK) 35 36 #define AXP22X_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 6) & AXP20X_ADC_RATE_MASK) 37 38 #define AXP813_V_I_ADC_RATE_MASK GENMASK(5, 4) 39 #define AXP813_ADC_RATE_MASK (AXP20X_ADC_RATE_MASK | AXP813_V_I_ADC_RATE_MASK) 40 #define AXP813_TS_GPIO0_ADC_RATE_HZ(x) AXP20X_ADC_RATE_HZ(x) 41 #define AXP813_V_I_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 4) & AXP813_V_I_ADC_RATE_MASK) 42 #define AXP813_ADC_RATE_HZ(x) (AXP20X_ADC_RATE_HZ(x) | AXP813_V_I_ADC_RATE_HZ(x)) 43 44 #define AXP20X_ADC_CHANNEL(_channel, _name, _type, _reg) \ 45 { \ 46 .type = _type, \ 47 .indexed = 1, \ 48 .channel = _channel, \ 49 .address = _reg, \ 50 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 51 BIT(IIO_CHAN_INFO_SCALE), \ 52 .datasheet_name = _name, \ 53 } 54 55 #define AXP20X_ADC_CHANNEL_OFFSET(_channel, _name, _type, _reg) \ 56 { \ 57 .type = _type, \ 58 .indexed = 1, \ 59 .channel = _channel, \ 60 .address = _reg, \ 61 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 62 BIT(IIO_CHAN_INFO_SCALE) |\ 63 BIT(IIO_CHAN_INFO_OFFSET),\ 64 .datasheet_name = _name, \ 65 } 66 67 struct axp_data; 68 69 struct axp20x_adc_iio { 70 struct regmap *regmap; 71 const struct axp_data *data; 72 }; 73 74 enum axp20x_adc_channel_v { 75 AXP20X_ACIN_V = 0, 76 AXP20X_VBUS_V, 77 AXP20X_TS_IN, 78 AXP20X_GPIO0_V, 79 AXP20X_GPIO1_V, 80 AXP20X_IPSOUT_V, 81 AXP20X_BATT_V, 82 }; 83 84 enum axp20x_adc_channel_i { 85 AXP20X_ACIN_I = 0, 86 AXP20X_VBUS_I, 87 AXP20X_BATT_CHRG_I, 88 AXP20X_BATT_DISCHRG_I, 89 }; 90 91 enum axp22x_adc_channel_v { 92 AXP22X_TS_IN = 0, 93 AXP22X_BATT_V, 94 }; 95 96 enum axp22x_adc_channel_i { 97 AXP22X_BATT_CHRG_I = 1, 98 AXP22X_BATT_DISCHRG_I, 99 }; 100 101 enum axp813_adc_channel_v { 102 AXP813_TS_IN = 0, 103 AXP813_GPIO0_V, 104 AXP813_BATT_V, 105 }; 106 107 static struct iio_map axp20x_maps[] = { 108 { 109 .consumer_dev_name = "axp20x-usb-power-supply", 110 .consumer_channel = "vbus_v", 111 .adc_channel_label = "vbus_v", 112 }, { 113 .consumer_dev_name = "axp20x-usb-power-supply", 114 .consumer_channel = "vbus_i", 115 .adc_channel_label = "vbus_i", 116 }, { 117 .consumer_dev_name = "axp20x-ac-power-supply", 118 .consumer_channel = "acin_v", 119 .adc_channel_label = "acin_v", 120 }, { 121 .consumer_dev_name = "axp20x-ac-power-supply", 122 .consumer_channel = "acin_i", 123 .adc_channel_label = "acin_i", 124 }, { 125 .consumer_dev_name = "axp20x-battery-power-supply", 126 .consumer_channel = "batt_v", 127 .adc_channel_label = "batt_v", 128 }, { 129 .consumer_dev_name = "axp20x-battery-power-supply", 130 .consumer_channel = "batt_chrg_i", 131 .adc_channel_label = "batt_chrg_i", 132 }, { 133 .consumer_dev_name = "axp20x-battery-power-supply", 134 .consumer_channel = "batt_dischrg_i", 135 .adc_channel_label = "batt_dischrg_i", 136 }, { /* sentinel */ } 137 }; 138 139 static struct iio_map axp22x_maps[] = { 140 { 141 .consumer_dev_name = "axp20x-battery-power-supply", 142 .consumer_channel = "batt_v", 143 .adc_channel_label = "batt_v", 144 }, { 145 .consumer_dev_name = "axp20x-battery-power-supply", 146 .consumer_channel = "batt_chrg_i", 147 .adc_channel_label = "batt_chrg_i", 148 }, { 149 .consumer_dev_name = "axp20x-battery-power-supply", 150 .consumer_channel = "batt_dischrg_i", 151 .adc_channel_label = "batt_dischrg_i", 152 }, { /* sentinel */ } 153 }; 154 155 /* 156 * Channels are mapped by physical system. Their channels share the same index. 157 * i.e. acin_i is in_current0_raw and acin_v is in_voltage0_raw. 158 * The only exception is for the battery. batt_v will be in_voltage6_raw and 159 * charge current in_current6_raw and discharge current will be in_current7_raw. 160 */ 161 static const struct iio_chan_spec axp20x_adc_channels[] = { 162 AXP20X_ADC_CHANNEL(AXP20X_ACIN_V, "acin_v", IIO_VOLTAGE, 163 AXP20X_ACIN_V_ADC_H), 164 AXP20X_ADC_CHANNEL(AXP20X_ACIN_I, "acin_i", IIO_CURRENT, 165 AXP20X_ACIN_I_ADC_H), 166 AXP20X_ADC_CHANNEL(AXP20X_VBUS_V, "vbus_v", IIO_VOLTAGE, 167 AXP20X_VBUS_V_ADC_H), 168 AXP20X_ADC_CHANNEL(AXP20X_VBUS_I, "vbus_i", IIO_CURRENT, 169 AXP20X_VBUS_I_ADC_H), 170 { 171 .type = IIO_TEMP, 172 .address = AXP20X_TEMP_ADC_H, 173 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 174 BIT(IIO_CHAN_INFO_SCALE) | 175 BIT(IIO_CHAN_INFO_OFFSET), 176 .datasheet_name = "pmic_temp", 177 }, 178 AXP20X_ADC_CHANNEL_OFFSET(AXP20X_GPIO0_V, "gpio0_v", IIO_VOLTAGE, 179 AXP20X_GPIO0_V_ADC_H), 180 AXP20X_ADC_CHANNEL_OFFSET(AXP20X_GPIO1_V, "gpio1_v", IIO_VOLTAGE, 181 AXP20X_GPIO1_V_ADC_H), 182 AXP20X_ADC_CHANNEL(AXP20X_IPSOUT_V, "ipsout_v", IIO_VOLTAGE, 183 AXP20X_IPSOUT_V_HIGH_H), 184 AXP20X_ADC_CHANNEL(AXP20X_BATT_V, "batt_v", IIO_VOLTAGE, 185 AXP20X_BATT_V_H), 186 AXP20X_ADC_CHANNEL(AXP20X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT, 187 AXP20X_BATT_CHRG_I_H), 188 AXP20X_ADC_CHANNEL(AXP20X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT, 189 AXP20X_BATT_DISCHRG_I_H), 190 AXP20X_ADC_CHANNEL(AXP20X_TS_IN, "ts_v", IIO_VOLTAGE, 191 AXP20X_TS_IN_H), 192 }; 193 194 static const struct iio_chan_spec axp22x_adc_channels[] = { 195 { 196 .type = IIO_TEMP, 197 .address = AXP22X_PMIC_TEMP_H, 198 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 199 BIT(IIO_CHAN_INFO_SCALE) | 200 BIT(IIO_CHAN_INFO_OFFSET), 201 .datasheet_name = "pmic_temp", 202 }, 203 AXP20X_ADC_CHANNEL(AXP22X_BATT_V, "batt_v", IIO_VOLTAGE, 204 AXP20X_BATT_V_H), 205 AXP20X_ADC_CHANNEL(AXP22X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT, 206 AXP20X_BATT_CHRG_I_H), 207 AXP20X_ADC_CHANNEL(AXP22X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT, 208 AXP20X_BATT_DISCHRG_I_H), 209 AXP20X_ADC_CHANNEL(AXP22X_TS_IN, "ts_v", IIO_VOLTAGE, 210 AXP22X_TS_ADC_H), 211 }; 212 213 static const struct iio_chan_spec axp813_adc_channels[] = { 214 { 215 .type = IIO_TEMP, 216 .address = AXP22X_PMIC_TEMP_H, 217 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 218 BIT(IIO_CHAN_INFO_SCALE) | 219 BIT(IIO_CHAN_INFO_OFFSET), 220 .datasheet_name = "pmic_temp", 221 }, 222 AXP20X_ADC_CHANNEL(AXP813_GPIO0_V, "gpio0_v", IIO_VOLTAGE, 223 AXP288_GP_ADC_H), 224 AXP20X_ADC_CHANNEL(AXP813_BATT_V, "batt_v", IIO_VOLTAGE, 225 AXP20X_BATT_V_H), 226 AXP20X_ADC_CHANNEL(AXP22X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT, 227 AXP20X_BATT_CHRG_I_H), 228 AXP20X_ADC_CHANNEL(AXP22X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT, 229 AXP20X_BATT_DISCHRG_I_H), 230 AXP20X_ADC_CHANNEL(AXP813_TS_IN, "ts_v", IIO_VOLTAGE, 231 AXP288_TS_ADC_H), 232 }; 233 234 static int axp20x_adc_raw(struct iio_dev *indio_dev, 235 struct iio_chan_spec const *chan, int *val) 236 { 237 struct axp20x_adc_iio *info = iio_priv(indio_dev); 238 int ret, size; 239 240 /* 241 * N.B.: Unlike the Chinese datasheets tell, the charging current is 242 * stored on 12 bits, not 13 bits. Only discharging current is on 13 243 * bits. 244 */ 245 if (chan->type == IIO_CURRENT && chan->channel == AXP20X_BATT_DISCHRG_I) 246 size = 13; 247 else 248 size = 12; 249 250 ret = axp20x_read_variable_width(info->regmap, chan->address, size); 251 if (ret < 0) 252 return ret; 253 254 *val = ret; 255 return IIO_VAL_INT; 256 } 257 258 static int axp22x_adc_raw(struct iio_dev *indio_dev, 259 struct iio_chan_spec const *chan, int *val) 260 { 261 struct axp20x_adc_iio *info = iio_priv(indio_dev); 262 int ret; 263 264 ret = axp20x_read_variable_width(info->regmap, chan->address, 12); 265 if (ret < 0) 266 return ret; 267 268 *val = ret; 269 return IIO_VAL_INT; 270 } 271 272 static int axp813_adc_raw(struct iio_dev *indio_dev, 273 struct iio_chan_spec const *chan, int *val) 274 { 275 struct axp20x_adc_iio *info = iio_priv(indio_dev); 276 int ret; 277 278 ret = axp20x_read_variable_width(info->regmap, chan->address, 12); 279 if (ret < 0) 280 return ret; 281 282 *val = ret; 283 return IIO_VAL_INT; 284 } 285 286 static int axp20x_adc_scale_voltage(int channel, int *val, int *val2) 287 { 288 switch (channel) { 289 case AXP20X_ACIN_V: 290 case AXP20X_VBUS_V: 291 *val = 1; 292 *val2 = 700000; 293 return IIO_VAL_INT_PLUS_MICRO; 294 295 case AXP20X_GPIO0_V: 296 case AXP20X_GPIO1_V: 297 *val = 0; 298 *val2 = 500000; 299 return IIO_VAL_INT_PLUS_MICRO; 300 301 case AXP20X_BATT_V: 302 *val = 1; 303 *val2 = 100000; 304 return IIO_VAL_INT_PLUS_MICRO; 305 306 case AXP20X_IPSOUT_V: 307 *val = 1; 308 *val2 = 400000; 309 return IIO_VAL_INT_PLUS_MICRO; 310 311 case AXP20X_TS_IN: 312 /* 0.8 mV per LSB */ 313 *val = 0; 314 *val2 = 800000; 315 return IIO_VAL_INT_PLUS_MICRO; 316 317 default: 318 return -EINVAL; 319 } 320 } 321 322 static int axp22x_adc_scale_voltage(int channel, int *val, int *val2) 323 { 324 switch (channel) { 325 case AXP22X_BATT_V: 326 /* 1.1 mV per LSB */ 327 *val = 1; 328 *val2 = 100000; 329 return IIO_VAL_INT_PLUS_MICRO; 330 331 case AXP22X_TS_IN: 332 /* 0.8 mV per LSB */ 333 *val = 0; 334 *val2 = 800000; 335 return IIO_VAL_INT_PLUS_MICRO; 336 337 default: 338 return -EINVAL; 339 } 340 } 341 static int axp813_adc_scale_voltage(int channel, int *val, int *val2) 342 { 343 switch (channel) { 344 case AXP813_GPIO0_V: 345 *val = 0; 346 *val2 = 800000; 347 return IIO_VAL_INT_PLUS_MICRO; 348 349 case AXP813_BATT_V: 350 *val = 1; 351 *val2 = 100000; 352 return IIO_VAL_INT_PLUS_MICRO; 353 354 case AXP813_TS_IN: 355 /* 0.8 mV per LSB */ 356 *val = 0; 357 *val2 = 800000; 358 return IIO_VAL_INT_PLUS_MICRO; 359 360 default: 361 return -EINVAL; 362 } 363 } 364 365 static int axp20x_adc_scale_current(int channel, int *val, int *val2) 366 { 367 switch (channel) { 368 case AXP20X_ACIN_I: 369 *val = 0; 370 *val2 = 625000; 371 return IIO_VAL_INT_PLUS_MICRO; 372 373 case AXP20X_VBUS_I: 374 *val = 0; 375 *val2 = 375000; 376 return IIO_VAL_INT_PLUS_MICRO; 377 378 case AXP20X_BATT_DISCHRG_I: 379 case AXP20X_BATT_CHRG_I: 380 *val = 0; 381 *val2 = 500000; 382 return IIO_VAL_INT_PLUS_MICRO; 383 384 default: 385 return -EINVAL; 386 } 387 } 388 389 static int axp20x_adc_scale(struct iio_chan_spec const *chan, int *val, 390 int *val2) 391 { 392 switch (chan->type) { 393 case IIO_VOLTAGE: 394 return axp20x_adc_scale_voltage(chan->channel, val, val2); 395 396 case IIO_CURRENT: 397 return axp20x_adc_scale_current(chan->channel, val, val2); 398 399 case IIO_TEMP: 400 *val = 100; 401 return IIO_VAL_INT; 402 403 default: 404 return -EINVAL; 405 } 406 } 407 408 static int axp22x_adc_scale(struct iio_chan_spec const *chan, int *val, 409 int *val2) 410 { 411 switch (chan->type) { 412 case IIO_VOLTAGE: 413 return axp22x_adc_scale_voltage(chan->channel, val, val2); 414 415 case IIO_CURRENT: 416 *val = 1; 417 return IIO_VAL_INT; 418 419 case IIO_TEMP: 420 *val = 100; 421 return IIO_VAL_INT; 422 423 default: 424 return -EINVAL; 425 } 426 } 427 428 static int axp813_adc_scale(struct iio_chan_spec const *chan, int *val, 429 int *val2) 430 { 431 switch (chan->type) { 432 case IIO_VOLTAGE: 433 return axp813_adc_scale_voltage(chan->channel, val, val2); 434 435 case IIO_CURRENT: 436 *val = 1; 437 return IIO_VAL_INT; 438 439 case IIO_TEMP: 440 *val = 100; 441 return IIO_VAL_INT; 442 443 default: 444 return -EINVAL; 445 } 446 } 447 448 static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel, 449 int *val) 450 { 451 struct axp20x_adc_iio *info = iio_priv(indio_dev); 452 unsigned int regval; 453 int ret; 454 455 ret = regmap_read(info->regmap, AXP20X_GPIO10_IN_RANGE, ®val); 456 if (ret < 0) 457 return ret; 458 459 switch (channel) { 460 case AXP20X_GPIO0_V: 461 regval = FIELD_GET(AXP20X_GPIO10_IN_RANGE_GPIO0, regval); 462 break; 463 464 case AXP20X_GPIO1_V: 465 regval = FIELD_GET(AXP20X_GPIO10_IN_RANGE_GPIO1, regval); 466 break; 467 468 default: 469 return -EINVAL; 470 } 471 472 *val = regval ? 700000 : 0; 473 return IIO_VAL_INT; 474 } 475 476 static int axp20x_adc_offset(struct iio_dev *indio_dev, 477 struct iio_chan_spec const *chan, int *val) 478 { 479 switch (chan->type) { 480 case IIO_VOLTAGE: 481 return axp20x_adc_offset_voltage(indio_dev, chan->channel, val); 482 483 case IIO_TEMP: 484 *val = -1447; 485 return IIO_VAL_INT; 486 487 default: 488 return -EINVAL; 489 } 490 } 491 492 static int axp20x_read_raw(struct iio_dev *indio_dev, 493 struct iio_chan_spec const *chan, int *val, 494 int *val2, long mask) 495 { 496 switch (mask) { 497 case IIO_CHAN_INFO_OFFSET: 498 return axp20x_adc_offset(indio_dev, chan, val); 499 500 case IIO_CHAN_INFO_SCALE: 501 return axp20x_adc_scale(chan, val, val2); 502 503 case IIO_CHAN_INFO_RAW: 504 return axp20x_adc_raw(indio_dev, chan, val); 505 506 default: 507 return -EINVAL; 508 } 509 } 510 511 static int axp22x_read_raw(struct iio_dev *indio_dev, 512 struct iio_chan_spec const *chan, int *val, 513 int *val2, long mask) 514 { 515 switch (mask) { 516 case IIO_CHAN_INFO_OFFSET: 517 /* For PMIC temp only */ 518 *val = -2677; 519 return IIO_VAL_INT; 520 521 case IIO_CHAN_INFO_SCALE: 522 return axp22x_adc_scale(chan, val, val2); 523 524 case IIO_CHAN_INFO_RAW: 525 return axp22x_adc_raw(indio_dev, chan, val); 526 527 default: 528 return -EINVAL; 529 } 530 } 531 532 static int axp813_read_raw(struct iio_dev *indio_dev, 533 struct iio_chan_spec const *chan, int *val, 534 int *val2, long mask) 535 { 536 switch (mask) { 537 case IIO_CHAN_INFO_OFFSET: 538 *val = -2667; 539 return IIO_VAL_INT; 540 541 case IIO_CHAN_INFO_SCALE: 542 return axp813_adc_scale(chan, val, val2); 543 544 case IIO_CHAN_INFO_RAW: 545 return axp813_adc_raw(indio_dev, chan, val); 546 547 default: 548 return -EINVAL; 549 } 550 } 551 552 static int axp20x_write_raw(struct iio_dev *indio_dev, 553 struct iio_chan_spec const *chan, int val, int val2, 554 long mask) 555 { 556 struct axp20x_adc_iio *info = iio_priv(indio_dev); 557 unsigned int regmask, regval; 558 559 /* 560 * The AXP20X PMIC allows the user to choose between 0V and 0.7V offsets 561 * for (independently) GPIO0 and GPIO1 when in ADC mode. 562 */ 563 if (mask != IIO_CHAN_INFO_OFFSET) 564 return -EINVAL; 565 566 if (val != 0 && val != 700000) 567 return -EINVAL; 568 569 switch (chan->channel) { 570 case AXP20X_GPIO0_V: 571 regmask = AXP20X_GPIO10_IN_RANGE_GPIO0; 572 regval = FIELD_PREP(AXP20X_GPIO10_IN_RANGE_GPIO0, !!val); 573 break; 574 575 case AXP20X_GPIO1_V: 576 regmask = AXP20X_GPIO10_IN_RANGE_GPIO1; 577 regval = FIELD_PREP(AXP20X_GPIO10_IN_RANGE_GPIO1, !!val); 578 break; 579 580 default: 581 return -EINVAL; 582 } 583 584 return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE, regmask, regval); 585 } 586 587 static const struct iio_info axp20x_adc_iio_info = { 588 .read_raw = axp20x_read_raw, 589 .write_raw = axp20x_write_raw, 590 }; 591 592 static const struct iio_info axp22x_adc_iio_info = { 593 .read_raw = axp22x_read_raw, 594 }; 595 596 static const struct iio_info axp813_adc_iio_info = { 597 .read_raw = axp813_read_raw, 598 }; 599 600 static int axp20x_adc_rate(struct axp20x_adc_iio *info, int rate) 601 { 602 return regmap_update_bits(info->regmap, AXP20X_ADC_RATE, 603 AXP20X_ADC_RATE_MASK, 604 AXP20X_ADC_RATE_HZ(rate)); 605 } 606 607 static int axp22x_adc_rate(struct axp20x_adc_iio *info, int rate) 608 { 609 return regmap_update_bits(info->regmap, AXP20X_ADC_RATE, 610 AXP20X_ADC_RATE_MASK, 611 AXP22X_ADC_RATE_HZ(rate)); 612 } 613 614 static int axp813_adc_rate(struct axp20x_adc_iio *info, int rate) 615 { 616 return regmap_update_bits(info->regmap, AXP813_ADC_RATE, 617 AXP813_ADC_RATE_MASK, 618 AXP813_ADC_RATE_HZ(rate)); 619 } 620 621 struct axp_data { 622 const struct iio_info *iio_info; 623 int num_channels; 624 struct iio_chan_spec const *channels; 625 unsigned long adc_en1_mask; 626 unsigned long adc_en2_mask; 627 int (*adc_rate)(struct axp20x_adc_iio *info, 628 int rate); 629 struct iio_map *maps; 630 }; 631 632 static const struct axp_data axp20x_data = { 633 .iio_info = &axp20x_adc_iio_info, 634 .num_channels = ARRAY_SIZE(axp20x_adc_channels), 635 .channels = axp20x_adc_channels, 636 .adc_en1_mask = AXP20X_ADC_EN1_MASK, 637 .adc_en2_mask = AXP20X_ADC_EN2_MASK, 638 .adc_rate = axp20x_adc_rate, 639 .maps = axp20x_maps, 640 }; 641 642 static const struct axp_data axp22x_data = { 643 .iio_info = &axp22x_adc_iio_info, 644 .num_channels = ARRAY_SIZE(axp22x_adc_channels), 645 .channels = axp22x_adc_channels, 646 .adc_en1_mask = AXP22X_ADC_EN1_MASK, 647 .adc_rate = axp22x_adc_rate, 648 .maps = axp22x_maps, 649 }; 650 651 static const struct axp_data axp813_data = { 652 .iio_info = &axp813_adc_iio_info, 653 .num_channels = ARRAY_SIZE(axp813_adc_channels), 654 .channels = axp813_adc_channels, 655 .adc_en1_mask = AXP22X_ADC_EN1_MASK, 656 .adc_rate = axp813_adc_rate, 657 .maps = axp22x_maps, 658 }; 659 660 static const struct of_device_id axp20x_adc_of_match[] = { 661 { .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, }, 662 { .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, }, 663 { .compatible = "x-powers,axp813-adc", .data = (void *)&axp813_data, }, 664 { /* sentinel */ } 665 }; 666 MODULE_DEVICE_TABLE(of, axp20x_adc_of_match); 667 668 static const struct platform_device_id axp20x_adc_id_match[] = { 669 { .name = "axp20x-adc", .driver_data = (kernel_ulong_t)&axp20x_data, }, 670 { .name = "axp22x-adc", .driver_data = (kernel_ulong_t)&axp22x_data, }, 671 { .name = "axp813-adc", .driver_data = (kernel_ulong_t)&axp813_data, }, 672 { /* sentinel */ }, 673 }; 674 MODULE_DEVICE_TABLE(platform, axp20x_adc_id_match); 675 676 static int axp20x_probe(struct platform_device *pdev) 677 { 678 struct axp20x_adc_iio *info; 679 struct iio_dev *indio_dev; 680 struct axp20x_dev *axp20x_dev; 681 int ret; 682 683 axp20x_dev = dev_get_drvdata(pdev->dev.parent); 684 685 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info)); 686 if (!indio_dev) 687 return -ENOMEM; 688 689 info = iio_priv(indio_dev); 690 platform_set_drvdata(pdev, indio_dev); 691 692 info->regmap = axp20x_dev->regmap; 693 indio_dev->modes = INDIO_DIRECT_MODE; 694 695 if (!dev_fwnode(&pdev->dev)) { 696 const struct platform_device_id *id; 697 698 id = platform_get_device_id(pdev); 699 info->data = (const struct axp_data *)id->driver_data; 700 } else { 701 struct device *dev = &pdev->dev; 702 703 info->data = device_get_match_data(dev); 704 } 705 706 indio_dev->name = platform_get_device_id(pdev)->name; 707 indio_dev->info = info->data->iio_info; 708 indio_dev->num_channels = info->data->num_channels; 709 indio_dev->channels = info->data->channels; 710 711 /* Enable the ADCs on IP */ 712 regmap_write(info->regmap, AXP20X_ADC_EN1, info->data->adc_en1_mask); 713 714 if (info->data->adc_en2_mask) 715 regmap_update_bits(info->regmap, AXP20X_ADC_EN2, 716 info->data->adc_en2_mask, 717 info->data->adc_en2_mask); 718 719 /* Configure ADCs rate */ 720 info->data->adc_rate(info, 100); 721 722 ret = iio_map_array_register(indio_dev, info->data->maps); 723 if (ret < 0) { 724 dev_err(&pdev->dev, "failed to register IIO maps: %d\n", ret); 725 goto fail_map; 726 } 727 728 ret = iio_device_register(indio_dev); 729 if (ret < 0) { 730 dev_err(&pdev->dev, "could not register the device\n"); 731 goto fail_register; 732 } 733 734 return 0; 735 736 fail_register: 737 iio_map_array_unregister(indio_dev); 738 739 fail_map: 740 regmap_write(info->regmap, AXP20X_ADC_EN1, 0); 741 742 if (info->data->adc_en2_mask) 743 regmap_write(info->regmap, AXP20X_ADC_EN2, 0); 744 745 return ret; 746 } 747 748 static void axp20x_remove(struct platform_device *pdev) 749 { 750 struct iio_dev *indio_dev = platform_get_drvdata(pdev); 751 struct axp20x_adc_iio *info = iio_priv(indio_dev); 752 753 iio_device_unregister(indio_dev); 754 iio_map_array_unregister(indio_dev); 755 756 regmap_write(info->regmap, AXP20X_ADC_EN1, 0); 757 758 if (info->data->adc_en2_mask) 759 regmap_write(info->regmap, AXP20X_ADC_EN2, 0); 760 } 761 762 static struct platform_driver axp20x_adc_driver = { 763 .driver = { 764 .name = "axp20x-adc", 765 .of_match_table = axp20x_adc_of_match, 766 }, 767 .id_table = axp20x_adc_id_match, 768 .probe = axp20x_probe, 769 .remove_new = axp20x_remove, 770 }; 771 772 module_platform_driver(axp20x_adc_driver); 773 774 MODULE_DESCRIPTION("ADC driver for AXP20X and AXP22X PMICs"); 775 MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); 776 MODULE_LICENSE("GPL"); 777