1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/bitops.h> 7 #include <linux/completion.h> 8 #include <linux/delay.h> 9 #include <linux/err.h> 10 #include <linux/iio/iio.h> 11 #include <linux/interrupt.h> 12 #include <linux/kernel.h> 13 #include <linux/log2.h> 14 #include <linux/math64.h> 15 #include <linux/module.h> 16 #include <linux/of.h> 17 #include <linux/platform_device.h> 18 #include <linux/regmap.h> 19 #include <linux/slab.h> 20 21 #include <dt-bindings/iio/qcom,spmi-vadc.h> 22 #include "qcom-vadc-common.h" 23 24 #define ADC5_USR_REVISION1 0x0 25 #define ADC5_USR_STATUS1 0x8 26 #define ADC5_USR_STATUS1_CONV_FAULT BIT(7) 27 #define ADC5_USR_STATUS1_REQ_STS BIT(1) 28 #define ADC5_USR_STATUS1_EOC BIT(0) 29 #define ADC5_USR_STATUS1_REQ_STS_EOC_MASK 0x3 30 31 #define ADC5_USR_STATUS2 0x9 32 #define ADC5_USR_STATUS2_CONV_SEQ_MASK 0x70 33 #define ADC5_USR_STATUS2_CONV_SEQ_MASK_SHIFT 0x5 34 35 #define ADC5_USR_IBAT_MEAS 0xf 36 #define ADC5_USR_IBAT_MEAS_SUPPORTED BIT(0) 37 38 #define ADC5_USR_DIG_PARAM 0x42 39 #define ADC5_USR_DIG_PARAM_CAL_VAL BIT(6) 40 #define ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT 6 41 #define ADC5_USR_DIG_PARAM_CAL_SEL 0x30 42 #define ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT 4 43 #define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL 0xc 44 #define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT 2 45 46 #define ADC5_USR_FAST_AVG_CTL 0x43 47 #define ADC5_USR_FAST_AVG_CTL_EN BIT(7) 48 #define ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK 0x7 49 50 #define ADC5_USR_CH_SEL_CTL 0x44 51 52 #define ADC5_USR_DELAY_CTL 0x45 53 #define ADC5_USR_HW_SETTLE_DELAY_MASK 0xf 54 55 #define ADC5_USR_EN_CTL1 0x46 56 #define ADC5_USR_EN_CTL1_ADC_EN BIT(7) 57 58 #define ADC5_USR_CONV_REQ 0x47 59 #define ADC5_USR_CONV_REQ_REQ BIT(7) 60 61 #define ADC5_USR_DATA0 0x50 62 63 #define ADC5_USR_DATA1 0x51 64 65 #define ADC5_USR_IBAT_DATA0 0x52 66 67 #define ADC5_USR_IBAT_DATA1 0x53 68 69 #define ADC_CHANNEL_OFFSET 0x8 70 #define ADC_CHANNEL_MASK GENMASK(7, 0) 71 72 /* 73 * Conversion time varies based on the decimation, clock rate, fast average 74 * samples and measurements queued across different VADC peripherals. 75 * Set the timeout to a max of 100ms. 76 */ 77 #define ADC5_CONV_TIME_MIN_US 263 78 #define ADC5_CONV_TIME_MAX_US 264 79 #define ADC5_CONV_TIME_RETRY 400 80 #define ADC5_CONV_TIMEOUT msecs_to_jiffies(100) 81 82 /* Digital version >= 5.3 supports hw_settle_2 */ 83 #define ADC5_HW_SETTLE_DIFF_MINOR 3 84 #define ADC5_HW_SETTLE_DIFF_MAJOR 5 85 86 /* For PMIC7 */ 87 #define ADC_APP_SID 0x40 88 #define ADC_APP_SID_MASK GENMASK(3, 0) 89 #define ADC7_CONV_TIMEOUT msecs_to_jiffies(10) 90 91 enum adc5_cal_method { 92 ADC5_NO_CAL = 0, 93 ADC5_RATIOMETRIC_CAL, 94 ADC5_ABSOLUTE_CAL 95 }; 96 97 enum adc5_cal_val { 98 ADC5_TIMER_CAL = 0, 99 ADC5_NEW_CAL 100 }; 101 102 /** 103 * struct adc5_channel_prop - ADC channel property. 104 * @channel: channel number, refer to the channel list. 105 * @cal_method: calibration method. 106 * @cal_val: calibration value 107 * @decimation: sampling rate supported for the channel. 108 * @sid: slave id of PMIC owning the channel, for PMIC7. 109 * @prescale: channel scaling performed on the input signal. 110 * @hw_settle_time: the time between AMUX being configured and the 111 * start of conversion. 112 * @avg_samples: ability to provide single result from the ADC 113 * that is an average of multiple measurements. 114 * @scale_fn_type: Represents the scaling function to convert voltage 115 * physical units desired by the client for the channel. 116 * @datasheet_name: Channel name used in device tree. 117 */ 118 struct adc5_channel_prop { 119 unsigned int channel; 120 enum adc5_cal_method cal_method; 121 enum adc5_cal_val cal_val; 122 unsigned int decimation; 123 unsigned int sid; 124 unsigned int prescale; 125 unsigned int hw_settle_time; 126 unsigned int avg_samples; 127 enum vadc_scale_fn_type scale_fn_type; 128 const char *datasheet_name; 129 }; 130 131 /** 132 * struct adc5_chip - ADC private structure. 133 * @regmap: SPMI ADC5 peripheral register map field. 134 * @dev: SPMI ADC5 device. 135 * @base: base address for the ADC peripheral. 136 * @nchannels: number of ADC channels. 137 * @chan_props: array of ADC channel properties. 138 * @iio_chans: array of IIO channels specification. 139 * @poll_eoc: use polling instead of interrupt. 140 * @complete: ADC result notification after interrupt is received. 141 * @lock: ADC lock for access to the peripheral. 142 * @data: software configuration data. 143 */ 144 struct adc5_chip { 145 struct regmap *regmap; 146 struct device *dev; 147 u16 base; 148 unsigned int nchannels; 149 struct adc5_channel_prop *chan_props; 150 struct iio_chan_spec *iio_chans; 151 bool poll_eoc; 152 struct completion complete; 153 struct mutex lock; 154 const struct adc5_data *data; 155 }; 156 157 static const struct vadc_prescale_ratio adc5_prescale_ratios[] = { 158 {.num = 1, .den = 1}, 159 {.num = 1, .den = 3}, 160 {.num = 1, .den = 4}, 161 {.num = 1, .den = 6}, 162 {.num = 1, .den = 20}, 163 {.num = 1, .den = 8}, 164 {.num = 10, .den = 81}, 165 {.num = 1, .den = 10}, 166 {.num = 1, .den = 16} 167 }; 168 169 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len) 170 { 171 return regmap_bulk_read(adc->regmap, adc->base + offset, data, len); 172 } 173 174 static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len) 175 { 176 return regmap_bulk_write(adc->regmap, adc->base + offset, data, len); 177 } 178 179 static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val) 180 { 181 return regmap_update_bits(adc->regmap, adc->base + offset, mask, val); 182 } 183 184 static int adc5_prescaling_from_dt(u32 num, u32 den) 185 { 186 unsigned int pre; 187 188 for (pre = 0; pre < ARRAY_SIZE(adc5_prescale_ratios); pre++) 189 if (adc5_prescale_ratios[pre].num == num && 190 adc5_prescale_ratios[pre].den == den) 191 break; 192 193 if (pre == ARRAY_SIZE(adc5_prescale_ratios)) 194 return -EINVAL; 195 196 return pre; 197 } 198 199 static int adc5_hw_settle_time_from_dt(u32 value, 200 const unsigned int *hw_settle) 201 { 202 unsigned int i; 203 204 for (i = 0; i < VADC_HW_SETTLE_SAMPLES_MAX; i++) { 205 if (value == hw_settle[i]) 206 return i; 207 } 208 209 return -EINVAL; 210 } 211 212 static int adc5_avg_samples_from_dt(u32 value) 213 { 214 if (!is_power_of_2(value) || value > ADC5_AVG_SAMPLES_MAX) 215 return -EINVAL; 216 217 return __ffs(value); 218 } 219 220 static int adc5_decimation_from_dt(u32 value, 221 const unsigned int *decimation) 222 { 223 unsigned int i; 224 225 for (i = 0; i < ADC5_DECIMATION_SAMPLES_MAX; i++) { 226 if (value == decimation[i]) 227 return i; 228 } 229 230 return -EINVAL; 231 } 232 233 static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data) 234 { 235 int ret; 236 u8 rslt_lsb, rslt_msb; 237 238 ret = adc5_read(adc, ADC5_USR_DATA0, &rslt_lsb, sizeof(rslt_lsb)); 239 if (ret) 240 return ret; 241 242 ret = adc5_read(adc, ADC5_USR_DATA1, &rslt_msb, sizeof(rslt_lsb)); 243 if (ret) 244 return ret; 245 246 *data = (rslt_msb << 8) | rslt_lsb; 247 248 if (*data == ADC5_USR_DATA_CHECK) { 249 dev_err(adc->dev, "Invalid data:0x%x\n", *data); 250 return -EINVAL; 251 } 252 253 dev_dbg(adc->dev, "voltage raw code:0x%x\n", *data); 254 255 return 0; 256 } 257 258 static int adc5_poll_wait_eoc(struct adc5_chip *adc) 259 { 260 unsigned int count, retry = ADC5_CONV_TIME_RETRY; 261 u8 status1; 262 int ret; 263 264 for (count = 0; count < retry; count++) { 265 ret = adc5_read(adc, ADC5_USR_STATUS1, &status1, 266 sizeof(status1)); 267 if (ret) 268 return ret; 269 270 status1 &= ADC5_USR_STATUS1_REQ_STS_EOC_MASK; 271 if (status1 == ADC5_USR_STATUS1_EOC) 272 return 0; 273 274 usleep_range(ADC5_CONV_TIME_MIN_US, ADC5_CONV_TIME_MAX_US); 275 } 276 277 return -ETIMEDOUT; 278 } 279 280 static void adc5_update_dig_param(struct adc5_chip *adc, 281 struct adc5_channel_prop *prop, u8 *data) 282 { 283 /* Update calibration value */ 284 *data &= ~ADC5_USR_DIG_PARAM_CAL_VAL; 285 *data |= (prop->cal_val << ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT); 286 287 /* Update calibration select */ 288 *data &= ~ADC5_USR_DIG_PARAM_CAL_SEL; 289 *data |= (prop->cal_method << ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT); 290 291 /* Update decimation ratio select */ 292 *data &= ~ADC5_USR_DIG_PARAM_DEC_RATIO_SEL; 293 *data |= (prop->decimation << ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT); 294 } 295 296 static int adc5_configure(struct adc5_chip *adc, 297 struct adc5_channel_prop *prop) 298 { 299 int ret; 300 u8 buf[6]; 301 302 /* Read registers 0x42 through 0x46 */ 303 ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf)); 304 if (ret) 305 return ret; 306 307 /* Digital param selection */ 308 adc5_update_dig_param(adc, prop, &buf[0]); 309 310 /* Update fast average sample value */ 311 buf[1] &= (u8) ~ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK; 312 buf[1] |= prop->avg_samples; 313 314 /* Select ADC channel */ 315 buf[2] = prop->channel; 316 317 /* Select HW settle delay for channel */ 318 buf[3] &= (u8) ~ADC5_USR_HW_SETTLE_DELAY_MASK; 319 buf[3] |= prop->hw_settle_time; 320 321 /* Select ADC enable */ 322 buf[4] |= ADC5_USR_EN_CTL1_ADC_EN; 323 324 /* Select CONV request */ 325 buf[5] |= ADC5_USR_CONV_REQ_REQ; 326 327 if (!adc->poll_eoc) 328 reinit_completion(&adc->complete); 329 330 return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf)); 331 } 332 333 static int adc7_configure(struct adc5_chip *adc, 334 struct adc5_channel_prop *prop) 335 { 336 int ret; 337 u8 conv_req = 0, buf[4]; 338 339 ret = adc5_masked_write(adc, ADC_APP_SID, ADC_APP_SID_MASK, prop->sid); 340 if (ret) 341 return ret; 342 343 ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf)); 344 if (ret) 345 return ret; 346 347 /* Digital param selection */ 348 adc5_update_dig_param(adc, prop, &buf[0]); 349 350 /* Update fast average sample value */ 351 buf[1] &= ~ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK; 352 buf[1] |= prop->avg_samples; 353 354 /* Select ADC channel */ 355 buf[2] = prop->channel; 356 357 /* Select HW settle delay for channel */ 358 buf[3] &= ~ADC5_USR_HW_SETTLE_DELAY_MASK; 359 buf[3] |= prop->hw_settle_time; 360 361 /* Select CONV request */ 362 conv_req = ADC5_USR_CONV_REQ_REQ; 363 364 if (!adc->poll_eoc) 365 reinit_completion(&adc->complete); 366 367 ret = adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf)); 368 if (ret) 369 return ret; 370 371 return adc5_write(adc, ADC5_USR_CONV_REQ, &conv_req, 1); 372 } 373 374 static int adc5_do_conversion(struct adc5_chip *adc, 375 struct adc5_channel_prop *prop, 376 struct iio_chan_spec const *chan, 377 u16 *data_volt, u16 *data_cur) 378 { 379 int ret; 380 381 mutex_lock(&adc->lock); 382 383 ret = adc5_configure(adc, prop); 384 if (ret) { 385 dev_err(adc->dev, "ADC configure failed with %d\n", ret); 386 goto unlock; 387 } 388 389 if (adc->poll_eoc) { 390 ret = adc5_poll_wait_eoc(adc); 391 if (ret) { 392 dev_err(adc->dev, "EOC bit not set\n"); 393 goto unlock; 394 } 395 } else { 396 ret = wait_for_completion_timeout(&adc->complete, 397 ADC5_CONV_TIMEOUT); 398 if (!ret) { 399 dev_dbg(adc->dev, "Did not get completion timeout.\n"); 400 ret = adc5_poll_wait_eoc(adc); 401 if (ret) { 402 dev_err(adc->dev, "EOC bit not set\n"); 403 goto unlock; 404 } 405 } 406 } 407 408 ret = adc5_read_voltage_data(adc, data_volt); 409 unlock: 410 mutex_unlock(&adc->lock); 411 412 return ret; 413 } 414 415 static int adc7_do_conversion(struct adc5_chip *adc, 416 struct adc5_channel_prop *prop, 417 struct iio_chan_spec const *chan, 418 u16 *data_volt, u16 *data_cur) 419 { 420 int ret; 421 u8 status; 422 423 mutex_lock(&adc->lock); 424 425 ret = adc7_configure(adc, prop); 426 if (ret) { 427 dev_err(adc->dev, "ADC configure failed with %d\n", ret); 428 goto unlock; 429 } 430 431 /* No support for polling mode at present */ 432 wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT); 433 434 ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1); 435 if (ret) 436 goto unlock; 437 438 if (status & ADC5_USR_STATUS1_CONV_FAULT) { 439 dev_err(adc->dev, "Unexpected conversion fault\n"); 440 ret = -EIO; 441 goto unlock; 442 } 443 444 ret = adc5_read_voltage_data(adc, data_volt); 445 446 unlock: 447 mutex_unlock(&adc->lock); 448 449 return ret; 450 } 451 452 typedef int (*adc_do_conversion)(struct adc5_chip *adc, 453 struct adc5_channel_prop *prop, 454 struct iio_chan_spec const *chan, 455 u16 *data_volt, u16 *data_cur); 456 457 static irqreturn_t adc5_isr(int irq, void *dev_id) 458 { 459 struct adc5_chip *adc = dev_id; 460 461 complete(&adc->complete); 462 463 return IRQ_HANDLED; 464 } 465 466 static int adc5_of_xlate(struct iio_dev *indio_dev, 467 const struct of_phandle_args *iiospec) 468 { 469 struct adc5_chip *adc = iio_priv(indio_dev); 470 int i; 471 472 for (i = 0; i < adc->nchannels; i++) 473 if (adc->chan_props[i].channel == iiospec->args[0]) 474 return i; 475 476 return -EINVAL; 477 } 478 479 static int adc7_of_xlate(struct iio_dev *indio_dev, 480 const struct of_phandle_args *iiospec) 481 { 482 struct adc5_chip *adc = iio_priv(indio_dev); 483 int i, v_channel; 484 485 for (i = 0; i < adc->nchannels; i++) { 486 v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) | 487 adc->chan_props[i].channel; 488 if (v_channel == iiospec->args[0]) 489 return i; 490 } 491 492 return -EINVAL; 493 } 494 495 static int adc_read_raw_common(struct iio_dev *indio_dev, 496 struct iio_chan_spec const *chan, int *val, int *val2, 497 long mask, adc_do_conversion do_conv) 498 { 499 struct adc5_chip *adc = iio_priv(indio_dev); 500 struct adc5_channel_prop *prop; 501 u16 adc_code_volt, adc_code_cur; 502 int ret; 503 504 prop = &adc->chan_props[chan->address]; 505 506 switch (mask) { 507 case IIO_CHAN_INFO_PROCESSED: 508 ret = do_conv(adc, prop, chan, 509 &adc_code_volt, &adc_code_cur); 510 if (ret) 511 return ret; 512 513 ret = qcom_adc5_hw_scale(prop->scale_fn_type, 514 &adc5_prescale_ratios[prop->prescale], 515 adc->data, 516 adc_code_volt, val); 517 if (ret) 518 return ret; 519 520 return IIO_VAL_INT; 521 default: 522 return -EINVAL; 523 } 524 } 525 526 static int adc5_read_raw(struct iio_dev *indio_dev, 527 struct iio_chan_spec const *chan, int *val, int *val2, 528 long mask) 529 { 530 return adc_read_raw_common(indio_dev, chan, val, val2, 531 mask, adc5_do_conversion); 532 } 533 534 static int adc7_read_raw(struct iio_dev *indio_dev, 535 struct iio_chan_spec const *chan, int *val, int *val2, 536 long mask) 537 { 538 return adc_read_raw_common(indio_dev, chan, val, val2, 539 mask, adc7_do_conversion); 540 } 541 542 static const struct iio_info adc5_info = { 543 .read_raw = adc5_read_raw, 544 .of_xlate = adc5_of_xlate, 545 }; 546 547 static const struct iio_info adc7_info = { 548 .read_raw = adc7_read_raw, 549 .of_xlate = adc7_of_xlate, 550 }; 551 552 struct adc5_channels { 553 const char *datasheet_name; 554 unsigned int prescale_index; 555 enum iio_chan_type type; 556 long info_mask; 557 enum vadc_scale_fn_type scale_fn_type; 558 }; 559 560 /* In these definitions, _pre refers to an index into adc5_prescale_ratios. */ 561 #define ADC5_CHAN(_dname, _type, _mask, _pre, _scale) \ 562 { \ 563 .datasheet_name = _dname, \ 564 .prescale_index = _pre, \ 565 .type = _type, \ 566 .info_mask = _mask, \ 567 .scale_fn_type = _scale, \ 568 }, \ 569 570 #define ADC5_CHAN_TEMP(_dname, _pre, _scale) \ 571 ADC5_CHAN(_dname, IIO_TEMP, \ 572 BIT(IIO_CHAN_INFO_PROCESSED), \ 573 _pre, _scale) \ 574 575 #define ADC5_CHAN_VOLT(_dname, _pre, _scale) \ 576 ADC5_CHAN(_dname, IIO_VOLTAGE, \ 577 BIT(IIO_CHAN_INFO_PROCESSED), \ 578 _pre, _scale) \ 579 580 static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = { 581 [ADC5_REF_GND] = ADC5_CHAN_VOLT("ref_gnd", 0, 582 SCALE_HW_CALIB_DEFAULT) 583 [ADC5_1P25VREF] = ADC5_CHAN_VOLT("vref_1p25", 0, 584 SCALE_HW_CALIB_DEFAULT) 585 [ADC5_VPH_PWR] = ADC5_CHAN_VOLT("vph_pwr", 1, 586 SCALE_HW_CALIB_DEFAULT) 587 [ADC5_VBAT_SNS] = ADC5_CHAN_VOLT("vbat_sns", 1, 588 SCALE_HW_CALIB_DEFAULT) 589 [ADC5_DIE_TEMP] = ADC5_CHAN_TEMP("die_temp", 0, 590 SCALE_HW_CALIB_PMIC_THERM) 591 [ADC5_USB_IN_I] = ADC5_CHAN_VOLT("usb_in_i_uv", 0, 592 SCALE_HW_CALIB_DEFAULT) 593 [ADC5_USB_IN_V_16] = ADC5_CHAN_VOLT("usb_in_v_div_16", 8, 594 SCALE_HW_CALIB_DEFAULT) 595 [ADC5_CHG_TEMP] = ADC5_CHAN_TEMP("chg_temp", 0, 596 SCALE_HW_CALIB_PM5_CHG_TEMP) 597 /* Charger prescales SBUx and MID_CHG to fit within 1.8V upper unit */ 598 [ADC5_SBUx] = ADC5_CHAN_VOLT("chg_sbux", 1, 599 SCALE_HW_CALIB_DEFAULT) 600 [ADC5_MID_CHG_DIV6] = ADC5_CHAN_VOLT("chg_mid_chg", 3, 601 SCALE_HW_CALIB_DEFAULT) 602 [ADC5_XO_THERM_100K_PU] = ADC5_CHAN_TEMP("xo_therm", 0, 603 SCALE_HW_CALIB_XOTHERM) 604 [ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 0, 605 SCALE_HW_CALIB_THERM_100K_PULLUP) 606 [ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 0, 607 SCALE_HW_CALIB_THERM_100K_PULLUP) 608 [ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 0, 609 SCALE_HW_CALIB_THERM_100K_PULLUP) 610 [ADC5_AMUX_THM2] = ADC5_CHAN_TEMP("amux_thm2", 0, 611 SCALE_HW_CALIB_PM5_SMB_TEMP) 612 }; 613 614 static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = { 615 [ADC7_REF_GND] = ADC5_CHAN_VOLT("ref_gnd", 0, 616 SCALE_HW_CALIB_DEFAULT) 617 [ADC7_1P25VREF] = ADC5_CHAN_VOLT("vref_1p25", 0, 618 SCALE_HW_CALIB_DEFAULT) 619 [ADC7_VPH_PWR] = ADC5_CHAN_VOLT("vph_pwr", 1, 620 SCALE_HW_CALIB_DEFAULT) 621 [ADC7_VBAT_SNS] = ADC5_CHAN_VOLT("vbat_sns", 3, 622 SCALE_HW_CALIB_DEFAULT) 623 [ADC7_DIE_TEMP] = ADC5_CHAN_TEMP("die_temp", 0, 624 SCALE_HW_CALIB_PMIC_THERM_PM7) 625 [ADC7_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_pu2", 0, 626 SCALE_HW_CALIB_THERM_100K_PU_PM7) 627 [ADC7_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_pu2", 0, 628 SCALE_HW_CALIB_THERM_100K_PU_PM7) 629 [ADC7_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_pu2", 0, 630 SCALE_HW_CALIB_THERM_100K_PU_PM7) 631 [ADC7_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_pu2", 0, 632 SCALE_HW_CALIB_THERM_100K_PU_PM7) 633 [ADC7_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_pu2", 0, 634 SCALE_HW_CALIB_THERM_100K_PU_PM7) 635 [ADC7_AMUX_THM6_100K_PU] = ADC5_CHAN_TEMP("amux_thm6_pu2", 0, 636 SCALE_HW_CALIB_THERM_100K_PU_PM7) 637 [ADC7_GPIO1_100K_PU] = ADC5_CHAN_TEMP("gpio1_pu2", 0, 638 SCALE_HW_CALIB_THERM_100K_PU_PM7) 639 [ADC7_GPIO2_100K_PU] = ADC5_CHAN_TEMP("gpio2_pu2", 0, 640 SCALE_HW_CALIB_THERM_100K_PU_PM7) 641 [ADC7_GPIO3_100K_PU] = ADC5_CHAN_TEMP("gpio3_pu2", 0, 642 SCALE_HW_CALIB_THERM_100K_PU_PM7) 643 [ADC7_GPIO4_100K_PU] = ADC5_CHAN_TEMP("gpio4_pu2", 0, 644 SCALE_HW_CALIB_THERM_100K_PU_PM7) 645 }; 646 647 static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = { 648 [ADC5_REF_GND] = ADC5_CHAN_VOLT("ref_gnd", 0, 649 SCALE_HW_CALIB_DEFAULT) 650 [ADC5_1P25VREF] = ADC5_CHAN_VOLT("vref_1p25", 0, 651 SCALE_HW_CALIB_DEFAULT) 652 [ADC5_VPH_PWR] = ADC5_CHAN_VOLT("vph_pwr", 1, 653 SCALE_HW_CALIB_DEFAULT) 654 [ADC5_VBAT_SNS] = ADC5_CHAN_VOLT("vbat_sns", 1, 655 SCALE_HW_CALIB_DEFAULT) 656 [ADC5_VCOIN] = ADC5_CHAN_VOLT("vcoin", 1, 657 SCALE_HW_CALIB_DEFAULT) 658 [ADC5_DIE_TEMP] = ADC5_CHAN_TEMP("die_temp", 0, 659 SCALE_HW_CALIB_PMIC_THERM) 660 [ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 0, 661 SCALE_HW_CALIB_THERM_100K_PULLUP) 662 [ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 0, 663 SCALE_HW_CALIB_THERM_100K_PULLUP) 664 [ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 0, 665 SCALE_HW_CALIB_THERM_100K_PULLUP) 666 [ADC5_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_100k_pu", 0, 667 SCALE_HW_CALIB_THERM_100K_PULLUP) 668 [ADC5_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_100k_pu", 0, 669 SCALE_HW_CALIB_THERM_100K_PULLUP) 670 [ADC5_XO_THERM_100K_PU] = ADC5_CHAN_TEMP("xo_therm_100k_pu", 0, 671 SCALE_HW_CALIB_THERM_100K_PULLUP) 672 }; 673 674 static int adc5_get_dt_channel_data(struct adc5_chip *adc, 675 struct adc5_channel_prop *prop, 676 struct device_node *node, 677 const struct adc5_data *data) 678 { 679 const char *name = node->name, *channel_name; 680 u32 chan, value, varr[2]; 681 u32 sid = 0; 682 int ret; 683 struct device *dev = adc->dev; 684 685 ret = of_property_read_u32(node, "reg", &chan); 686 if (ret) { 687 dev_err(dev, "invalid channel number %s\n", name); 688 return ret; 689 } 690 691 /* Value read from "reg" is virtual channel number */ 692 693 /* virtual channel number = sid << 8 | channel number */ 694 695 if (adc->data->info == &adc7_info) { 696 sid = chan >> ADC_CHANNEL_OFFSET; 697 chan = chan & ADC_CHANNEL_MASK; 698 } 699 700 if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA || 701 !data->adc_chans[chan].datasheet_name) { 702 dev_err(dev, "%s invalid channel number %d\n", name, chan); 703 return -EINVAL; 704 } 705 706 /* the channel has DT description */ 707 prop->channel = chan; 708 prop->sid = sid; 709 710 channel_name = of_get_property(node, 711 "label", NULL) ? : node->name; 712 if (!channel_name) { 713 dev_err(dev, "Invalid channel name\n"); 714 return -EINVAL; 715 } 716 prop->datasheet_name = channel_name; 717 718 ret = of_property_read_u32(node, "qcom,decimation", &value); 719 if (!ret) { 720 ret = adc5_decimation_from_dt(value, data->decimation); 721 if (ret < 0) { 722 dev_err(dev, "%02x invalid decimation %d\n", 723 chan, value); 724 return ret; 725 } 726 prop->decimation = ret; 727 } else { 728 prop->decimation = ADC5_DECIMATION_DEFAULT; 729 } 730 731 ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2); 732 if (!ret) { 733 ret = adc5_prescaling_from_dt(varr[0], varr[1]); 734 if (ret < 0) { 735 dev_err(dev, "%02x invalid pre-scaling <%d %d>\n", 736 chan, varr[0], varr[1]); 737 return ret; 738 } 739 prop->prescale = ret; 740 } else { 741 prop->prescale = 742 adc->data->adc_chans[prop->channel].prescale_index; 743 } 744 745 ret = of_property_read_u32(node, "qcom,hw-settle-time", &value); 746 if (!ret) { 747 u8 dig_version[2]; 748 749 ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version, 750 sizeof(dig_version)); 751 if (ret) { 752 dev_err(dev, "Invalid dig version read %d\n", ret); 753 return ret; 754 } 755 756 dev_dbg(dev, "dig_ver:minor:%d, major:%d\n", dig_version[0], 757 dig_version[1]); 758 /* Digital controller >= 5.3 have hw_settle_2 option */ 759 if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR && 760 dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR) || 761 adc->data->info == &adc7_info) 762 ret = adc5_hw_settle_time_from_dt(value, 763 data->hw_settle_2); 764 else 765 ret = adc5_hw_settle_time_from_dt(value, 766 data->hw_settle_1); 767 768 if (ret < 0) { 769 dev_err(dev, "%02x invalid hw-settle-time %d us\n", 770 chan, value); 771 return ret; 772 } 773 prop->hw_settle_time = ret; 774 } else { 775 prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME; 776 } 777 778 ret = of_property_read_u32(node, "qcom,avg-samples", &value); 779 if (!ret) { 780 ret = adc5_avg_samples_from_dt(value); 781 if (ret < 0) { 782 dev_err(dev, "%02x invalid avg-samples %d\n", 783 chan, value); 784 return ret; 785 } 786 prop->avg_samples = ret; 787 } else { 788 prop->avg_samples = VADC_DEF_AVG_SAMPLES; 789 } 790 791 if (of_property_read_bool(node, "qcom,ratiometric")) 792 prop->cal_method = ADC5_RATIOMETRIC_CAL; 793 else 794 prop->cal_method = ADC5_ABSOLUTE_CAL; 795 796 /* 797 * Default to using timer calibration. Using a fresh calibration value 798 * for every conversion will increase the overall time for a request. 799 */ 800 prop->cal_val = ADC5_TIMER_CAL; 801 802 dev_dbg(dev, "%02x name %s\n", chan, name); 803 804 return 0; 805 } 806 807 static const struct adc5_data adc5_data_pmic = { 808 .full_scale_code_volt = 0x70e4, 809 .full_scale_code_cur = 0x2710, 810 .adc_chans = adc5_chans_pmic, 811 .info = &adc5_info, 812 .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX]) 813 {250, 420, 840}, 814 .hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX]) 815 {15, 100, 200, 300, 400, 500, 600, 700, 816 800, 900, 1, 2, 4, 6, 8, 10}, 817 .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX]) 818 {15, 100, 200, 300, 400, 500, 600, 700, 819 1, 2, 4, 8, 16, 32, 64, 128}, 820 }; 821 822 static const struct adc5_data adc7_data_pmic = { 823 .full_scale_code_volt = 0x70e4, 824 .adc_chans = adc7_chans_pmic, 825 .info = &adc7_info, 826 .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX]) 827 {85, 340, 1360}, 828 .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX]) 829 {15, 100, 200, 300, 400, 500, 600, 700, 830 1000, 2000, 4000, 8000, 16000, 32000, 831 64000, 128000}, 832 }; 833 834 static const struct adc5_data adc5_data_pmic_rev2 = { 835 .full_scale_code_volt = 0x4000, 836 .full_scale_code_cur = 0x1800, 837 .adc_chans = adc5_chans_rev2, 838 .info = &adc5_info, 839 .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX]) 840 {256, 512, 1024}, 841 .hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX]) 842 {0, 100, 200, 300, 400, 500, 600, 700, 843 800, 900, 1, 2, 4, 6, 8, 10}, 844 .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX]) 845 {15, 100, 200, 300, 400, 500, 600, 700, 846 1, 2, 4, 8, 16, 32, 64, 128}, 847 }; 848 849 static const struct of_device_id adc5_match_table[] = { 850 { 851 .compatible = "qcom,spmi-adc5", 852 .data = &adc5_data_pmic, 853 }, 854 { 855 .compatible = "qcom,spmi-adc7", 856 .data = &adc7_data_pmic, 857 }, 858 { 859 .compatible = "qcom,spmi-adc-rev2", 860 .data = &adc5_data_pmic_rev2, 861 }, 862 { } 863 }; 864 MODULE_DEVICE_TABLE(of, adc5_match_table); 865 866 static int adc5_get_dt_data(struct adc5_chip *adc, struct device_node *node) 867 { 868 const struct adc5_channels *adc_chan; 869 struct iio_chan_spec *iio_chan; 870 struct adc5_channel_prop prop, *chan_props; 871 struct device_node *child; 872 unsigned int index = 0; 873 const struct of_device_id *id; 874 const struct adc5_data *data; 875 int ret; 876 877 adc->nchannels = of_get_available_child_count(node); 878 if (!adc->nchannels) 879 return -EINVAL; 880 881 adc->iio_chans = devm_kcalloc(adc->dev, adc->nchannels, 882 sizeof(*adc->iio_chans), GFP_KERNEL); 883 if (!adc->iio_chans) 884 return -ENOMEM; 885 886 adc->chan_props = devm_kcalloc(adc->dev, adc->nchannels, 887 sizeof(*adc->chan_props), GFP_KERNEL); 888 if (!adc->chan_props) 889 return -ENOMEM; 890 891 chan_props = adc->chan_props; 892 iio_chan = adc->iio_chans; 893 id = of_match_node(adc5_match_table, node); 894 if (id) 895 data = id->data; 896 else 897 data = &adc5_data_pmic; 898 adc->data = data; 899 900 for_each_available_child_of_node(node, child) { 901 ret = adc5_get_dt_channel_data(adc, &prop, child, data); 902 if (ret) { 903 of_node_put(child); 904 return ret; 905 } 906 907 prop.scale_fn_type = 908 data->adc_chans[prop.channel].scale_fn_type; 909 *chan_props = prop; 910 adc_chan = &data->adc_chans[prop.channel]; 911 912 iio_chan->channel = prop.channel; 913 iio_chan->datasheet_name = prop.datasheet_name; 914 iio_chan->extend_name = prop.datasheet_name; 915 iio_chan->info_mask_separate = adc_chan->info_mask; 916 iio_chan->type = adc_chan->type; 917 iio_chan->address = index; 918 iio_chan++; 919 chan_props++; 920 index++; 921 } 922 923 return 0; 924 } 925 926 static int adc5_probe(struct platform_device *pdev) 927 { 928 struct device_node *node = pdev->dev.of_node; 929 struct device *dev = &pdev->dev; 930 struct iio_dev *indio_dev; 931 struct adc5_chip *adc; 932 struct regmap *regmap; 933 int ret, irq_eoc; 934 u32 reg; 935 936 regmap = dev_get_regmap(dev->parent, NULL); 937 if (!regmap) 938 return -ENODEV; 939 940 ret = of_property_read_u32(node, "reg", ®); 941 if (ret < 0) 942 return ret; 943 944 indio_dev = devm_iio_device_alloc(dev, sizeof(*adc)); 945 if (!indio_dev) 946 return -ENOMEM; 947 948 adc = iio_priv(indio_dev); 949 adc->regmap = regmap; 950 adc->dev = dev; 951 adc->base = reg; 952 953 init_completion(&adc->complete); 954 mutex_init(&adc->lock); 955 956 ret = adc5_get_dt_data(adc, node); 957 if (ret) { 958 dev_err(dev, "adc get dt data failed\n"); 959 return ret; 960 } 961 962 irq_eoc = platform_get_irq(pdev, 0); 963 if (irq_eoc < 0) { 964 if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL) 965 return irq_eoc; 966 adc->poll_eoc = true; 967 } else { 968 ret = devm_request_irq(dev, irq_eoc, adc5_isr, 0, 969 "pm-adc5", adc); 970 if (ret) 971 return ret; 972 } 973 974 indio_dev->name = pdev->name; 975 indio_dev->modes = INDIO_DIRECT_MODE; 976 indio_dev->info = adc->data->info; 977 indio_dev->channels = adc->iio_chans; 978 indio_dev->num_channels = adc->nchannels; 979 980 return devm_iio_device_register(dev, indio_dev); 981 } 982 983 static struct platform_driver adc5_driver = { 984 .driver = { 985 .name = "qcom-spmi-adc5", 986 .of_match_table = adc5_match_table, 987 }, 988 .probe = adc5_probe, 989 }; 990 module_platform_driver(adc5_driver); 991 992 MODULE_ALIAS("platform:qcom-spmi-adc5"); 993 MODULE_DESCRIPTION("Qualcomm Technologies Inc. PMIC5 ADC driver"); 994 MODULE_LICENSE("GPL v2"); 995