drivers/iio/adc/qcom-spmi-adc5.c

   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 static irqreturn_t adc5_isr(int irq, void *dev_id)
 453 {
 454         struct adc5_chip *adc = dev_id;
 455
 456         complete(&adc->complete);
 457
 458         return IRQ_HANDLED;
 459 }
 460
 461 static int adc5_of_xlate(struct iio_dev *indio_dev,
 462                                 const struct of_phandle_args *iiospec)
 463 {
 464         struct adc5_chip *adc = iio_priv(indio_dev);
 465         int i;
 466
 467         for (i = 0; i < adc->nchannels; i++)
 468                 if (adc->chan_props[i].channel == iiospec->args[0])
 469                         return i;
 470
 471         return -EINVAL;
 472 }
 473
 474 static int adc7_of_xlate(struct iio_dev *indio_dev,
 475                                 const struct of_phandle_args *iiospec)
 476 {
 477         struct adc5_chip *adc = iio_priv(indio_dev);
 478         int i, v_channel;
 479
 480         for (i = 0; i < adc->nchannels; i++) {
 481                 v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) |
 482                         adc->chan_props[i].channel;
 483                 if (v_channel == iiospec->args[0])
 484                         return i;
 485         }
 486
 487         return -EINVAL;
 488 }
 489
 490 static int adc5_read_raw(struct iio_dev *indio_dev,
 491                          struct iio_chan_spec const *chan, int *val, int *val2,
 492                          long mask)
 493 {
 494         struct adc5_chip *adc = iio_priv(indio_dev);
 495         struct adc5_channel_prop *prop;
 496         u16 adc_code_volt, adc_code_cur;
 497         int ret;
 498
 499         prop = &adc->chan_props[chan->address];
 500
 501         switch (mask) {
 502         case IIO_CHAN_INFO_PROCESSED:
 503                 ret = adc5_do_conversion(adc, prop, chan,
 504                                 &adc_code_volt, &adc_code_cur);
 505                 if (ret)
 506                         return ret;
 507
 508                 ret = qcom_adc5_hw_scale(prop->scale_fn_type,
 509                         &adc5_prescale_ratios[prop->prescale],
 510                         adc->data,
 511                         adc_code_volt, val);
 512                 if (ret)
 513                         return ret;
 514
 515                 return IIO_VAL_INT;
 516         default:
 517                 return -EINVAL;
 518         }
 519 }
 520
 521 static int adc7_read_raw(struct iio_dev *indio_dev,
 522                          struct iio_chan_spec const *chan, int *val, int *val2,
 523                          long mask)
 524 {
 525         struct adc5_chip *adc = iio_priv(indio_dev);
 526         struct adc5_channel_prop *prop;
 527         u16 adc_code_volt, adc_code_cur;
 528         int ret;
 529
 530         prop = &adc->chan_props[chan->address];
 531
 532         switch (mask) {
 533         case IIO_CHAN_INFO_PROCESSED:
 534                 ret = adc7_do_conversion(adc, prop, chan,
 535                                         &adc_code_volt, &adc_code_cur);
 536                 if (ret)
 537                         return ret;
 538
 539                 ret = qcom_adc5_hw_scale(prop->scale_fn_type,
 540                         &adc5_prescale_ratios[prop->prescale],
 541                         adc->data,
 542                         adc_code_volt, val);
 543
 544                 if (ret)
 545                         return ret;
 546
 547                 return IIO_VAL_INT;
 548         default:
 549                 return -EINVAL;
 550         }
 551 }
 552
 553 static const struct iio_info adc5_info = {
 554         .read_raw = adc5_read_raw,
 555         .of_xlate = adc5_of_xlate,
 556 };
 557
 558 static const struct iio_info adc7_info = {
 559         .read_raw = adc7_read_raw,
 560         .of_xlate = adc7_of_xlate,
 561 };
 562
 563 struct adc5_channels {
 564         const char *datasheet_name;
 565         unsigned int prescale_index;
 566         enum iio_chan_type type;
 567         long info_mask;
 568         enum vadc_scale_fn_type scale_fn_type;
 569 };
 570
 571 /* In these definitions, _pre refers to an index into adc5_prescale_ratios. */
 572 #define ADC5_CHAN(_dname, _type, _mask, _pre, _scale)                   \
 573         {                                                               \
 574                 .datasheet_name = _dname,                               \
 575                 .prescale_index = _pre,                                 \
 576                 .type = _type,                                          \
 577                 .info_mask = _mask,                                     \
 578                 .scale_fn_type = _scale,                                \
 579         },                                                              \
 580
 581 #define ADC5_CHAN_TEMP(_dname, _pre, _scale)                            \
 582         ADC5_CHAN(_dname, IIO_TEMP,                                     \
 583                 BIT(IIO_CHAN_INFO_PROCESSED),                           \
 584                 _pre, _scale)                                           \
 585
 586 #define ADC5_CHAN_VOLT(_dname, _pre, _scale)                            \
 587         ADC5_CHAN(_dname, IIO_VOLTAGE,                                  \
 588                   BIT(IIO_CHAN_INFO_PROCESSED),                         \
 589                   _pre, _scale)                                         \
 590
 591 static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = {
 592         [ADC5_REF_GND]          = ADC5_CHAN_VOLT("ref_gnd", 0,
 593                                         SCALE_HW_CALIB_DEFAULT)
 594         [ADC5_1P25VREF]         = ADC5_CHAN_VOLT("vref_1p25", 0,
 595                                         SCALE_HW_CALIB_DEFAULT)
 596         [ADC5_VPH_PWR]          = ADC5_CHAN_VOLT("vph_pwr", 1,
 597                                         SCALE_HW_CALIB_DEFAULT)
 598         [ADC5_VBAT_SNS]         = ADC5_CHAN_VOLT("vbat_sns", 1,
 599                                         SCALE_HW_CALIB_DEFAULT)
 600         [ADC5_DIE_TEMP]         = ADC5_CHAN_TEMP("die_temp", 0,
 601                                         SCALE_HW_CALIB_PMIC_THERM)
 602         [ADC5_USB_IN_I]         = ADC5_CHAN_VOLT("usb_in_i_uv", 0,
 603                                         SCALE_HW_CALIB_DEFAULT)
 604         [ADC5_USB_IN_V_16]      = ADC5_CHAN_VOLT("usb_in_v_div_16", 8,
 605                                         SCALE_HW_CALIB_DEFAULT)
 606         [ADC5_CHG_TEMP]         = ADC5_CHAN_TEMP("chg_temp", 0,
 607                                         SCALE_HW_CALIB_PM5_CHG_TEMP)
 608         /* Charger prescales SBUx and MID_CHG to fit within 1.8V upper unit */
 609         [ADC5_SBUx]             = ADC5_CHAN_VOLT("chg_sbux", 1,
 610                                         SCALE_HW_CALIB_DEFAULT)
 611         [ADC5_MID_CHG_DIV6]     = ADC5_CHAN_VOLT("chg_mid_chg", 3,
 612                                         SCALE_HW_CALIB_DEFAULT)
 613         [ADC5_XO_THERM_100K_PU] = ADC5_CHAN_TEMP("xo_therm", 0,
 614                                         SCALE_HW_CALIB_XOTHERM)
 615         [ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 0,
 616                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 617         [ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 0,
 618                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 619         [ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 0,
 620                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 621         [ADC5_AMUX_THM2]        = ADC5_CHAN_TEMP("amux_thm2", 0,
 622                                         SCALE_HW_CALIB_PM5_SMB_TEMP)
 623 };
 624
 625 static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = {
 626         [ADC7_REF_GND]          = ADC5_CHAN_VOLT("ref_gnd", 0,
 627                                         SCALE_HW_CALIB_DEFAULT)
 628         [ADC7_1P25VREF]         = ADC5_CHAN_VOLT("vref_1p25", 0,
 629                                         SCALE_HW_CALIB_DEFAULT)
 630         [ADC7_VPH_PWR]          = ADC5_CHAN_VOLT("vph_pwr", 1,
 631                                         SCALE_HW_CALIB_DEFAULT)
 632         [ADC7_VBAT_SNS]         = ADC5_CHAN_VOLT("vbat_sns", 3,
 633                                         SCALE_HW_CALIB_DEFAULT)
 634         [ADC7_DIE_TEMP]         = ADC5_CHAN_TEMP("die_temp", 0,
 635                                         SCALE_HW_CALIB_PMIC_THERM_PM7)
 636         [ADC7_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_pu2", 0,
 637                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 638         [ADC7_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_pu2", 0,
 639                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 640         [ADC7_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_pu2", 0,
 641                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 642         [ADC7_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_pu2", 0,
 643                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 644         [ADC7_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_pu2", 0,
 645                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 646         [ADC7_AMUX_THM6_100K_PU] = ADC5_CHAN_TEMP("amux_thm6_pu2", 0,
 647                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 648         [ADC7_GPIO1_100K_PU]    = ADC5_CHAN_TEMP("gpio1_pu2", 0,
 649                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 650         [ADC7_GPIO2_100K_PU]    = ADC5_CHAN_TEMP("gpio2_pu2", 0,
 651                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 652         [ADC7_GPIO3_100K_PU]    = ADC5_CHAN_TEMP("gpio3_pu2", 0,
 653                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 654         [ADC7_GPIO4_100K_PU]    = ADC5_CHAN_TEMP("gpio4_pu2", 0,
 655                                         SCALE_HW_CALIB_THERM_100K_PU_PM7)
 656 };
 657
 658 static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = {
 659         [ADC5_REF_GND]          = ADC5_CHAN_VOLT("ref_gnd", 0,
 660                                         SCALE_HW_CALIB_DEFAULT)
 661         [ADC5_1P25VREF]         = ADC5_CHAN_VOLT("vref_1p25", 0,
 662                                         SCALE_HW_CALIB_DEFAULT)
 663         [ADC5_VPH_PWR]          = ADC5_CHAN_VOLT("vph_pwr", 1,
 664                                         SCALE_HW_CALIB_DEFAULT)
 665         [ADC5_VBAT_SNS]         = ADC5_CHAN_VOLT("vbat_sns", 1,
 666                                         SCALE_HW_CALIB_DEFAULT)
 667         [ADC5_VCOIN]            = ADC5_CHAN_VOLT("vcoin", 1,
 668                                         SCALE_HW_CALIB_DEFAULT)
 669         [ADC5_DIE_TEMP]         = ADC5_CHAN_TEMP("die_temp", 0,
 670                                         SCALE_HW_CALIB_PMIC_THERM)
 671         [ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 0,
 672                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 673         [ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 0,
 674                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 675         [ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 0,
 676                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 677         [ADC5_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_100k_pu", 0,
 678                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 679         [ADC5_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_100k_pu", 0,
 680                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 681         [ADC5_XO_THERM_100K_PU] = ADC5_CHAN_TEMP("xo_therm_100k_pu", 0,
 682                                         SCALE_HW_CALIB_THERM_100K_PULLUP)
 683 };
 684
 685 static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 686                                     struct adc5_channel_prop *prop,
 687                                     struct device_node *node,
 688                                     const struct adc5_data *data)
 689 {
 690         const char *name = node->name, *channel_name;
 691         u32 chan, value, varr[2];
 692         u32 sid = 0;
 693         int ret;
 694         struct device *dev = adc->dev;
 695
 696         ret = of_property_read_u32(node, "reg", &chan);
 697         if (ret) {
 698                 dev_err(dev, "invalid channel number %s\n", name);
 699                 return ret;
 700         }
 701
 702         /* Value read from "reg" is virtual channel number */
 703
 704         /* virtual channel number = sid << 8 | channel number */
 705
 706         if (adc->data->info == &adc7_info) {
 707                 sid = chan >> ADC_CHANNEL_OFFSET;
 708                 chan = chan & ADC_CHANNEL_MASK;
 709         }
 710
 711         if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||
 712             !data->adc_chans[chan].datasheet_name) {
 713                 dev_err(dev, "%s invalid channel number %d\n", name, chan);
 714                 return -EINVAL;
 715         }
 716
 717         /* the channel has DT description */
 718         prop->channel = chan;
 719         prop->sid = sid;
 720
 721         channel_name = of_get_property(node,
 722                                 "label", NULL) ? : node->name;
 723         if (!channel_name) {
 724                 dev_err(dev, "Invalid channel name\n");
 725                 return -EINVAL;
 726         }
 727         prop->datasheet_name = channel_name;
 728
 729         ret = of_property_read_u32(node, "qcom,decimation", &value);
 730         if (!ret) {
 731                 ret = adc5_decimation_from_dt(value, data->decimation);
 732                 if (ret < 0) {
 733                         dev_err(dev, "%02x invalid decimation %d\n",
 734                                 chan, value);
 735                         return ret;
 736                 }
 737                 prop->decimation = ret;
 738         } else {
 739                 prop->decimation = ADC5_DECIMATION_DEFAULT;
 740         }
 741
 742         ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
 743         if (!ret) {
 744                 ret = adc5_prescaling_from_dt(varr[0], varr[1]);
 745                 if (ret < 0) {
 746                         dev_err(dev, "%02x invalid pre-scaling <%d %d>\n",
 747                                 chan, varr[0], varr[1]);
 748                         return ret;
 749                 }
 750                 prop->prescale = ret;
 751         } else {
 752                 prop->prescale =
 753                         adc->data->adc_chans[prop->channel].prescale_index;
 754         }
 755
 756         ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);
 757         if (!ret) {
 758                 u8 dig_version[2];
 759
 760                 ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,
 761                                                         sizeof(dig_version));
 762                 if (ret) {
 763                         dev_err(dev, "Invalid dig version read %d\n", ret);
 764                         return ret;
 765                 }
 766
 767                 dev_dbg(dev, "dig_ver:minor:%d, major:%d\n", dig_version[0],
 768                                                 dig_version[1]);
 769                 /* Digital controller >= 5.3 have hw_settle_2 option */
 770                 if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
 771                         dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR) ||
 772                         adc->data->info == &adc7_info)
 773                         ret = adc5_hw_settle_time_from_dt(value,
 774                                                         data->hw_settle_2);
 775                 else
 776                         ret = adc5_hw_settle_time_from_dt(value,
 777                                                         data->hw_settle_1);
 778
 779                 if (ret < 0) {
 780                         dev_err(dev, "%02x invalid hw-settle-time %d us\n",
 781                                 chan, value);
 782                         return ret;
 783                 }
 784                 prop->hw_settle_time = ret;
 785         } else {
 786                 prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
 787         }
 788
 789         ret = of_property_read_u32(node, "qcom,avg-samples", &value);
 790         if (!ret) {
 791                 ret = adc5_avg_samples_from_dt(value);
 792                 if (ret < 0) {
 793                         dev_err(dev, "%02x invalid avg-samples %d\n",
 794                                 chan, value);
 795                         return ret;
 796                 }
 797                 prop->avg_samples = ret;
 798         } else {
 799                 prop->avg_samples = VADC_DEF_AVG_SAMPLES;
 800         }
 801
 802         if (of_property_read_bool(node, "qcom,ratiometric"))
 803                 prop->cal_method = ADC5_RATIOMETRIC_CAL;
 804         else
 805                 prop->cal_method = ADC5_ABSOLUTE_CAL;
 806
 807         /*
 808          * Default to using timer calibration. Using a fresh calibration value
 809          * for every conversion will increase the overall time for a request.
 810          */
 811         prop->cal_val = ADC5_TIMER_CAL;
 812
 813         dev_dbg(dev, "%02x name %s\n", chan, name);
 814
 815         return 0;
 816 }
 817
 818 static const struct adc5_data adc5_data_pmic = {
 819         .full_scale_code_volt = 0x70e4,
 820         .full_scale_code_cur = 0x2710,
 821         .adc_chans = adc5_chans_pmic,
 822         .info = &adc5_info,
 823         .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 824                                 {250, 420, 840},
 825         .hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
 826                                 {15, 100, 200, 300, 400, 500, 600, 700,
 827                                 800, 900, 1, 2, 4, 6, 8, 10},
 828         .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
 829                                 {15, 100, 200, 300, 400, 500, 600, 700,
 830                                 1, 2, 4, 8, 16, 32, 64, 128},
 831 };
 832
 833 static const struct adc5_data adc7_data_pmic = {
 834         .full_scale_code_volt = 0x70e4,
 835         .adc_chans = adc7_chans_pmic,
 836         .info = &adc7_info,
 837         .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 838                                 {85, 340, 1360},
 839         .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
 840                                 {15, 100, 200, 300, 400, 500, 600, 700,
 841                                 1000, 2000, 4000, 8000, 16000, 32000,
 842                                 64000, 128000},
 843 };
 844
 845 static const struct adc5_data adc5_data_pmic_rev2 = {
 846         .full_scale_code_volt = 0x4000,
 847         .full_scale_code_cur = 0x1800,
 848         .adc_chans = adc5_chans_rev2,
 849         .info = &adc5_info,
 850         .decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 851                                 {256, 512, 1024},
 852         .hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
 853                                 {0, 100, 200, 300, 400, 500, 600, 700,
 854                                 800, 900, 1, 2, 4, 6, 8, 10},
 855         .hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
 856                                 {15, 100, 200, 300, 400, 500, 600, 700,
 857                                 1, 2, 4, 8, 16, 32, 64, 128},
 858 };
 859
 860 static const struct of_device_id adc5_match_table[] = {
 861         {
 862                 .compatible = "qcom,spmi-adc5",
 863                 .data = &adc5_data_pmic,
 864         },
 865         {
 866                 .compatible = "qcom,spmi-adc7",
 867                 .data = &adc7_data_pmic,
 868         },
 869         {
 870                 .compatible = "qcom,spmi-adc-rev2",
 871                 .data = &adc5_data_pmic_rev2,
 872         },
 873         { }
 874 };
 875 MODULE_DEVICE_TABLE(of, adc5_match_table);
 876
 877 static int adc5_get_dt_data(struct adc5_chip *adc, struct device_node *node)
 878 {
 879         const struct adc5_channels *adc_chan;
 880         struct iio_chan_spec *iio_chan;
 881         struct adc5_channel_prop prop, *chan_props;
 882         struct device_node *child;
 883         unsigned int index = 0;
 884         const struct of_device_id *id;
 885         const struct adc5_data *data;
 886         int ret;
 887
 888         adc->nchannels = of_get_available_child_count(node);
 889         if (!adc->nchannels)
 890                 return -EINVAL;
 891
 892         adc->iio_chans = devm_kcalloc(adc->dev, adc->nchannels,
 893                                        sizeof(*adc->iio_chans), GFP_KERNEL);
 894         if (!adc->iio_chans)
 895                 return -ENOMEM;
 896
 897         adc->chan_props = devm_kcalloc(adc->dev, adc->nchannels,
 898                                         sizeof(*adc->chan_props), GFP_KERNEL);
 899         if (!adc->chan_props)
 900                 return -ENOMEM;
 901
 902         chan_props = adc->chan_props;
 903         iio_chan = adc->iio_chans;
 904         id = of_match_node(adc5_match_table, node);
 905         if (id)
 906                 data = id->data;
 907         else
 908                 data = &adc5_data_pmic;
 909         adc->data = data;
 910
 911         for_each_available_child_of_node(node, child) {
 912                 ret = adc5_get_dt_channel_data(adc, &prop, child, data);
 913                 if (ret) {
 914                         of_node_put(child);
 915                         return ret;
 916                 }
 917
 918                 prop.scale_fn_type =
 919                         data->adc_chans[prop.channel].scale_fn_type;
 920                 *chan_props = prop;
 921                 adc_chan = &data->adc_chans[prop.channel];
 922
 923                 iio_chan->channel = prop.channel;
 924                 iio_chan->datasheet_name = prop.datasheet_name;
 925                 iio_chan->extend_name = prop.datasheet_name;
 926                 iio_chan->info_mask_separate = adc_chan->info_mask;
 927                 iio_chan->type = adc_chan->type;
 928                 iio_chan->address = index;
 929                 iio_chan++;
 930                 chan_props++;
 931                 index++;
 932         }
 933
 934         return 0;
 935 }
 936
 937 static int adc5_probe(struct platform_device *pdev)
 938 {
 939         struct device_node *node = pdev->dev.of_node;
 940         struct device *dev = &pdev->dev;
 941         struct iio_dev *indio_dev;
 942         struct adc5_chip *adc;
 943         struct regmap *regmap;
 944         int ret, irq_eoc;
 945         u32 reg;
 946
 947         regmap = dev_get_regmap(dev->parent, NULL);
 948         if (!regmap)
 949                 return -ENODEV;
 950
 951         ret = of_property_read_u32(node, "reg", &reg);
 952         if (ret < 0)
 953                 return ret;
 954
 955         indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
 956         if (!indio_dev)
 957                 return -ENOMEM;
 958
 959         adc = iio_priv(indio_dev);
 960         adc->regmap = regmap;
 961         adc->dev = dev;
 962         adc->base = reg;
 963
 964         init_completion(&adc->complete);
 965         mutex_init(&adc->lock);
 966
 967         ret = adc5_get_dt_data(adc, node);
 968         if (ret) {
 969                 dev_err(dev, "adc get dt data failed\n");
 970                 return ret;
 971         }
 972
 973         irq_eoc = platform_get_irq(pdev, 0);
 974         if (irq_eoc < 0) {
 975                 if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
 976                         return irq_eoc;
 977                 adc->poll_eoc = true;
 978         } else {
 979                 ret = devm_request_irq(dev, irq_eoc, adc5_isr, 0,
 980                                        "pm-adc5", adc);
 981                 if (ret)
 982                         return ret;
 983         }
 984
 985         indio_dev->name = pdev->name;
 986         indio_dev->modes = INDIO_DIRECT_MODE;
 987         indio_dev->info = adc->data->info;
 988         indio_dev->channels = adc->iio_chans;
 989         indio_dev->num_channels = adc->nchannels;
 990
 991         return devm_iio_device_register(dev, indio_dev);
 992 }
 993
 994 static struct platform_driver adc5_driver = {
 995         .driver = {
 996                 .name = "qcom-spmi-adc5.c",
 997                 .of_match_table = adc5_match_table,
 998         },
 999         .probe = adc5_probe,
1000 };
1001 module_platform_driver(adc5_driver);
1002
1003 MODULE_ALIAS("platform:qcom-spmi-adc5");
1004 MODULE_DESCRIPTION("Qualcomm Technologies Inc. PMIC5 ADC driver");
1005 MODULE_LICENSE("GPL v2");