1// SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * iio/adc/max1363.c 4 * Copyright (C) 2008-2010 Jonathan Cameron 5 * 6 * based on linux/drivers/i2c/chips/max123x 7 * Copyright (C) 2002-2004 Stefan Eletzhofer 8 * 9 * based on linux/drivers/acron/char/pcf8583.c 10 * Copyright (C) 2000 Russell King 11 * 12 * Driver for max1363 and similar chips. 13 */ 14 15#include <linux/interrupt.h> 16#include <linux/device.h> 17#include <linux/kernel.h> 18#include <linux/sysfs.h> 19#include <linux/list.h> 20#include <linux/i2c.h> 21#include <linux/regulator/consumer.h> 22#include <linux/slab.h> 23#include <linux/err.h> 24#include <linux/module.h> 25#include <linux/mod_devicetable.h> 26#include <linux/property.h> 27 28#include <linux/iio/iio.h> 29#include <linux/iio/sysfs.h> 30#include <linux/iio/events.h> 31#include <linux/iio/buffer.h> 32#include <linux/iio/kfifo_buf.h> 33#include <linux/iio/trigger_consumer.h> 34#include <linux/iio/triggered_buffer.h> 35 36#define MAX1363_SETUP_BYTE(a) ((a) | 0x80) 37 38/* There is a fair bit more defined here than currently 39 * used, but the intention is to support everything these 40 * chips do in the long run */ 41 42/* see data sheets */ 43/* max1363 and max1236, max1237, max1238, max1239 */ 44#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00 45#define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20 46#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40 47#define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60 48#define MAX1363_SETUP_POWER_UP_INT_REF 0x10 49#define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00 50 51/* think about including max11600 etc - more settings */ 52#define MAX1363_SETUP_EXT_CLOCK 0x08 53#define MAX1363_SETUP_INT_CLOCK 0x00 54#define MAX1363_SETUP_UNIPOLAR 0x00 55#define MAX1363_SETUP_BIPOLAR 0x04 56#define MAX1363_SETUP_RESET 0x00 57#define MAX1363_SETUP_NORESET 0x02 58/* max1363 only - though don't care on others. 59 * For now monitor modes are not implemented as the relevant 60 * line is not connected on my test board. 61 * The definitions are here as I intend to add this soon. 62 */ 63#define MAX1363_SETUP_MONITOR_SETUP 0x01 64 65/* Specific to the max1363 */ 66#define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4)) 67#define MAX1363_MON_INT_ENABLE 0x01 68 69/* defined for readability reasons */ 70/* All chips */ 71#define MAX1363_CONFIG_BYTE(a) ((a)) 72 73#define MAX1363_CONFIG_SE 0x01 74#define MAX1363_CONFIG_DE 0x00 75#define MAX1363_CONFIG_SCAN_TO_CS 0x00 76#define MAX1363_CONFIG_SCAN_SINGLE_8 0x20 77#define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40 78#define MAX1363_CONFIG_SCAN_SINGLE_1 0x60 79/* max123{6-9} only */ 80#define MAX1236_SCAN_MID_TO_CHANNEL 0x40 81 82/* max1363 only - merely part of channel selects or don't care for others */ 83#define MAX1363_CONFIG_EN_MON_MODE_READ 0x18 84 85#define MAX1363_CHANNEL_SEL(a) ((a) << 1) 86 87/* max1363 strictly 0x06 - but doesn't matter */ 88#define MAX1363_CHANNEL_SEL_MASK 0x1E 89#define MAX1363_SCAN_MASK 0x60 90#define MAX1363_SE_DE_MASK 0x01 91 92#define MAX1363_MAX_CHANNELS 25 93/** 94 * struct max1363_mode - scan mode information 95 * @conf: The corresponding value of the configuration register 96 * @modemask: Bit mask corresponding to channels enabled in this mode 97 */ 98struct max1363_mode { 99 int8_t conf; 100 DECLARE_BITMAP(modemask, MAX1363_MAX_CHANNELS); 101}; 102 103/* This must be maintained along side the max1363_mode_table in max1363_core */ 104enum max1363_modes { 105 /* Single read of a single channel */ 106 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11, 107 /* Differential single read */ 108 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11, 109 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10, 110 /* Scan to channel and mid to channel where overlapping */ 111 s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6, 112 s6to7, s0to7, s6to8, s0to8, s6to9, 113 s0to9, s6to10, s0to10, s6to11, s0to11, 114 /* Differential scan to channel and mid to channel where overlapping */ 115 d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9, 116 d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2, 117 d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8, 118 d7m6to11m10, d1m0to11m10, 119}; 120 121/** 122 * struct max1363_chip_info - chip specifc information 123 * @info: iio core function callbacks structure 124 * @channels: channel specification 125 * @num_channels: number of channels 126 * @mode_list: array of available scan modes 127 * @default_mode: the scan mode in which the chip starts up 128 * @int_vref_mv: the internal reference voltage 129 * @num_modes: number of modes 130 * @bits: accuracy of the adc in bits 131 */ 132struct max1363_chip_info { 133 const struct iio_info *info; 134 const struct iio_chan_spec *channels; 135 int num_channels; 136 const enum max1363_modes *mode_list; 137 enum max1363_modes default_mode; 138 u16 int_vref_mv; 139 u8 num_modes; 140 u8 bits; 141}; 142 143/** 144 * struct max1363_state - driver instance specific data 145 * @client: i2c_client 146 * @setupbyte: cache of current device setup byte 147 * @configbyte: cache of current device config byte 148 * @chip_info: chip model specific constants, available modes, etc. 149 * @current_mode: the scan mode of this chip 150 * @requestedmask: a valid requested set of channels 151 * @lock: lock to ensure state is consistent 152 * @monitor_on: whether monitor mode is enabled 153 * @monitor_speed: parameter corresponding to device monitor speed setting 154 * @mask_high: bitmask for enabled high thresholds 155 * @mask_low: bitmask for enabled low thresholds 156 * @thresh_high: high threshold values 157 * @thresh_low: low threshold values 158 * @vref: Reference voltage regulator 159 * @vref_uv: Actual (external or internal) reference voltage 160 * @send: function used to send data to the chip 161 * @recv: function used to receive data from the chip 162 */ 163struct max1363_state { 164 struct i2c_client *client; 165 u8 setupbyte; 166 u8 configbyte; 167 const struct max1363_chip_info *chip_info; 168 const struct max1363_mode *current_mode; 169 u32 requestedmask; 170 struct mutex lock; 171 172 /* Using monitor modes and buffer at the same time is 173 currently not supported */ 174 bool monitor_on; 175 unsigned int monitor_speed:3; 176 u8 mask_high; 177 u8 mask_low; 178 /* 4x unipolar first then the fours bipolar ones */ 179 s16 thresh_high[8]; 180 s16 thresh_low[8]; 181 struct regulator *vref; 182 u32 vref_uv; 183 int (*send)(const struct i2c_client *client, 184 const char *buf, int count); 185 int (*recv)(const struct i2c_client *client, 186 char *buf, int count); 187}; 188 189#define MAX1363_MODE_SINGLE(_num, _mask) { \ 190 .conf = MAX1363_CHANNEL_SEL(_num) \ 191 | MAX1363_CONFIG_SCAN_SINGLE_1 \ 192 | MAX1363_CONFIG_SE, \ 193 .modemask[0] = _mask, \ 194 } 195 196#define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \ 197 .conf = MAX1363_CHANNEL_SEL(_num) \ 198 | MAX1363_CONFIG_SCAN_TO_CS \ 199 | MAX1363_CONFIG_SE, \ 200 .modemask[0] = _mask, \ 201 } 202 203/* note not available for max1363 hence naming */ 204#define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \ 205 .conf = MAX1363_CHANNEL_SEL(_num) \ 206 | MAX1236_SCAN_MID_TO_CHANNEL \ 207 | MAX1363_CONFIG_SE, \ 208 .modemask[0] = _mask \ 209} 210 211#define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \ 212 .conf = MAX1363_CHANNEL_SEL(_nump) \ 213 | MAX1363_CONFIG_SCAN_SINGLE_1 \ 214 | MAX1363_CONFIG_DE, \ 215 .modemask[0] = _mask \ 216 } 217 218/* Can't think how to automate naming so specify for now */ 219#define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \ 220 .conf = MAX1363_CHANNEL_SEL(_num) \ 221 | MAX1363_CONFIG_SCAN_TO_CS \ 222 | MAX1363_CONFIG_DE, \ 223 .modemask[0] = _mask \ 224 } 225 226/* note only available for max1363 hence naming */ 227#define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \ 228 .conf = MAX1363_CHANNEL_SEL(_num) \ 229 | MAX1236_SCAN_MID_TO_CHANNEL \ 230 | MAX1363_CONFIG_SE, \ 231 .modemask[0] = _mask \ 232} 233 234static const struct max1363_mode max1363_mode_table[] = { 235 /* All of the single channel options first */ 236 MAX1363_MODE_SINGLE(0, 1 << 0), 237 MAX1363_MODE_SINGLE(1, 1 << 1), 238 MAX1363_MODE_SINGLE(2, 1 << 2), 239 MAX1363_MODE_SINGLE(3, 1 << 3), 240 MAX1363_MODE_SINGLE(4, 1 << 4), 241 MAX1363_MODE_SINGLE(5, 1 << 5), 242 MAX1363_MODE_SINGLE(6, 1 << 6), 243 MAX1363_MODE_SINGLE(7, 1 << 7), 244 MAX1363_MODE_SINGLE(8, 1 << 8), 245 MAX1363_MODE_SINGLE(9, 1 << 9), 246 MAX1363_MODE_SINGLE(10, 1 << 10), 247 MAX1363_MODE_SINGLE(11, 1 << 11), 248 249 MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12), 250 MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13), 251 MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14), 252 MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15), 253 MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16), 254 MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17), 255 MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18), 256 MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19), 257 MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20), 258 MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21), 259 MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22), 260 MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23), 261 262 /* The multichannel scans next */ 263 MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003), 264 MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007), 265 MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C), 266 MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F), 267 MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F), 268 MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F), 269 MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F), 270 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0), 271 MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF), 272 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0), 273 MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF), 274 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0), 275 MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF), 276 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0), 277 MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF), 278 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0), 279 MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF), 280 281 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000), 282 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000), 283 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000), 284 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000), 285 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000), 286 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000), 287 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000), 288 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000), 289 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000), 290 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000), 291 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000), 292 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000), 293 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000), 294 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000), 295}; 296 297static const struct max1363_mode 298*max1363_match_mode(const unsigned long *mask, 299 const struct max1363_chip_info *ci) 300{ 301 int i; 302 if (mask) 303 for (i = 0; i < ci->num_modes; i++) 304 if (bitmap_subset(mask, 305 max1363_mode_table[ci->mode_list[i]]. 306 modemask, 307 MAX1363_MAX_CHANNELS)) 308 return &max1363_mode_table[ci->mode_list[i]]; 309 return NULL; 310} 311 312static int max1363_smbus_send(const struct i2c_client *client, const char *buf, 313 int count) 314{ 315 int i, err; 316 317 for (i = err = 0; err == 0 && i < count; ++i) 318 err = i2c_smbus_write_byte(client, buf[i]); 319 320 return err ? err : count; 321} 322 323static int max1363_smbus_recv(const struct i2c_client *client, char *buf, 324 int count) 325{ 326 int i, ret; 327 328 for (i = 0; i < count; ++i) { 329 ret = i2c_smbus_read_byte(client); 330 if (ret < 0) 331 return ret; 332 buf[i] = ret; 333 } 334 335 return count; 336} 337 338static int max1363_write_basic_config(struct max1363_state *st) 339{ 340 u8 tx_buf[2] = { st->setupbyte, st->configbyte }; 341 342 return st->send(st->client, tx_buf, 2); 343} 344 345static int max1363_set_scan_mode(struct max1363_state *st) 346{ 347 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK 348 | MAX1363_SCAN_MASK 349 | MAX1363_SE_DE_MASK); 350 st->configbyte |= st->current_mode->conf; 351 352 return max1363_write_basic_config(st); 353} 354 355static int max1363_read_single_chan(struct iio_dev *indio_dev, 356 struct iio_chan_spec const *chan, 357 int *val, 358 long m) 359{ 360 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { 361 s32 data; 362 u8 rxbuf[2]; 363 struct max1363_state *st = iio_priv(indio_dev); 364 struct i2c_client *client = st->client; 365 366 guard(mutex)(&st->lock); 367 368 /* 369 * If monitor mode is enabled, the method for reading a single 370 * channel will have to be rather different and has not yet 371 * been implemented. 372 * 373 * Also, cannot read directly if buffered capture enabled. 374 */ 375 if (st->monitor_on) 376 return -EBUSY; 377 378 /* Check to see if current scan mode is correct */ 379 if (st->current_mode != &max1363_mode_table[chan->address]) { 380 int ret; 381 382 /* Update scan mode if needed */ 383 st->current_mode = &max1363_mode_table[chan->address]; 384 ret = max1363_set_scan_mode(st); 385 if (ret < 0) 386 return ret; 387 } 388 if (st->chip_info->bits != 8) { 389 /* Get reading */ 390 data = st->recv(client, rxbuf, 2); 391 if (data < 0) 392 return data; 393 394 data = (rxbuf[1] | rxbuf[0] << 8) & 395 ((1 << st->chip_info->bits) - 1); 396 } else { 397 /* Get reading */ 398 data = st->recv(client, rxbuf, 1); 399 if (data < 0) 400 return data; 401 402 data = rxbuf[0]; 403 } 404 *val = data; 405 406 return 0; 407 } 408 unreachable(); 409} 410 411static int max1363_read_raw(struct iio_dev *indio_dev, 412 struct iio_chan_spec const *chan, 413 int *val, 414 int *val2, 415 long m) 416{ 417 struct max1363_state *st = iio_priv(indio_dev); 418 int ret; 419 420 switch (m) { 421 case IIO_CHAN_INFO_RAW: 422 ret = max1363_read_single_chan(indio_dev, chan, val, m); 423 if (ret < 0) 424 return ret; 425 return IIO_VAL_INT; 426 case IIO_CHAN_INFO_SCALE: 427 *val = st->vref_uv / 1000; 428 *val2 = st->chip_info->bits; 429 return IIO_VAL_FRACTIONAL_LOG2; 430 default: 431 return -EINVAL; 432 } 433 return 0; 434} 435 436/* Applies to max1363 */ 437static const enum max1363_modes max1363_mode_list[] = { 438 _s0, _s1, _s2, _s3, 439 s0to1, s0to2, s0to3, 440 d0m1, d2m3, d1m0, d3m2, 441 d0m1to2m3, d1m0to3m2, 442}; 443 444static const struct iio_event_spec max1363_events[] = { 445 { 446 .type = IIO_EV_TYPE_THRESH, 447 .dir = IIO_EV_DIR_RISING, 448 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 449 BIT(IIO_EV_INFO_ENABLE), 450 }, { 451 .type = IIO_EV_TYPE_THRESH, 452 .dir = IIO_EV_DIR_FALLING, 453 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 454 BIT(IIO_EV_INFO_ENABLE), 455 }, 456}; 457 458#define MAX1363_CHAN_U(num, addr, si, bits, ev_spec, num_ev_spec) \ 459 { \ 460 .type = IIO_VOLTAGE, \ 461 .indexed = 1, \ 462 .channel = num, \ 463 .address = addr, \ 464 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 465 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ 466 .datasheet_name = "AIN"#num, \ 467 .scan_type = { \ 468 .sign = 'u', \ 469 .realbits = bits, \ 470 .storagebits = (bits > 8) ? 16 : 8, \ 471 .endianness = IIO_BE, \ 472 }, \ 473 .scan_index = si, \ 474 .event_spec = ev_spec, \ 475 .num_event_specs = num_ev_spec, \ 476 } 477 478/* bipolar channel */ 479#define MAX1363_CHAN_B(num, num2, addr, si, bits, ev_spec, num_ev_spec) \ 480 { \ 481 .type = IIO_VOLTAGE, \ 482 .differential = 1, \ 483 .indexed = 1, \ 484 .channel = num, \ 485 .channel2 = num2, \ 486 .address = addr, \ 487 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 488 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ 489 .datasheet_name = "AIN"#num"-AIN"#num2, \ 490 .scan_type = { \ 491 .sign = 's', \ 492 .realbits = bits, \ 493 .storagebits = (bits > 8) ? 16 : 8, \ 494 .endianness = IIO_BE, \ 495 }, \ 496 .scan_index = si, \ 497 .event_spec = ev_spec, \ 498 .num_event_specs = num_ev_spec, \ 499 } 500 501#define MAX1363_4X_CHANS(bits, ev_spec, num_ev_spec) { \ 502 MAX1363_CHAN_U(0, _s0, 0, bits, ev_spec, num_ev_spec), \ 503 MAX1363_CHAN_U(1, _s1, 1, bits, ev_spec, num_ev_spec), \ 504 MAX1363_CHAN_U(2, _s2, 2, bits, ev_spec, num_ev_spec), \ 505 MAX1363_CHAN_U(3, _s3, 3, bits, ev_spec, num_ev_spec), \ 506 MAX1363_CHAN_B(0, 1, d0m1, 4, bits, ev_spec, num_ev_spec), \ 507 MAX1363_CHAN_B(2, 3, d2m3, 5, bits, ev_spec, num_ev_spec), \ 508 MAX1363_CHAN_B(1, 0, d1m0, 6, bits, ev_spec, num_ev_spec), \ 509 MAX1363_CHAN_B(3, 2, d3m2, 7, bits, ev_spec, num_ev_spec), \ 510 IIO_CHAN_SOFT_TIMESTAMP(8) \ 511 } 512 513static const struct iio_chan_spec max1036_channels[] = 514 MAX1363_4X_CHANS(8, NULL, 0); 515static const struct iio_chan_spec max1136_channels[] = 516 MAX1363_4X_CHANS(10, NULL, 0); 517static const struct iio_chan_spec max1236_channels[] = 518 MAX1363_4X_CHANS(12, NULL, 0); 519static const struct iio_chan_spec max1361_channels[] = 520 MAX1363_4X_CHANS(10, max1363_events, ARRAY_SIZE(max1363_events)); 521static const struct iio_chan_spec max1363_channels[] = 522 MAX1363_4X_CHANS(12, max1363_events, ARRAY_SIZE(max1363_events)); 523 524/* Applies to max1236, max1237 */ 525static const enum max1363_modes max1236_mode_list[] = { 526 _s0, _s1, _s2, _s3, 527 s0to1, s0to2, s0to3, 528 d0m1, d2m3, d1m0, d3m2, 529 d0m1to2m3, d1m0to3m2, 530 s2to3, 531}; 532 533/* Applies to max1238, max1239 */ 534static const enum max1363_modes max1238_mode_list[] = { 535 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11, 536 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, 537 s0to7, s0to8, s0to9, s0to10, s0to11, 538 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11, 539 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10, 540 d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11, 541 d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10, 542 s6to7, s6to8, s6to9, s6to10, s6to11, 543 d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10, 544}; 545 546#define MAX1363_12X_CHANS(bits) { \ 547 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \ 548 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ 549 MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \ 550 MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \ 551 MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \ 552 MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \ 553 MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \ 554 MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \ 555 MAX1363_CHAN_U(8, _s8, 8, bits, NULL, 0), \ 556 MAX1363_CHAN_U(9, _s9, 9, bits, NULL, 0), \ 557 MAX1363_CHAN_U(10, _s10, 10, bits, NULL, 0), \ 558 MAX1363_CHAN_U(11, _s11, 11, bits, NULL, 0), \ 559 MAX1363_CHAN_B(0, 1, d0m1, 12, bits, NULL, 0), \ 560 MAX1363_CHAN_B(2, 3, d2m3, 13, bits, NULL, 0), \ 561 MAX1363_CHAN_B(4, 5, d4m5, 14, bits, NULL, 0), \ 562 MAX1363_CHAN_B(6, 7, d6m7, 15, bits, NULL, 0), \ 563 MAX1363_CHAN_B(8, 9, d8m9, 16, bits, NULL, 0), \ 564 MAX1363_CHAN_B(10, 11, d10m11, 17, bits, NULL, 0), \ 565 MAX1363_CHAN_B(1, 0, d1m0, 18, bits, NULL, 0), \ 566 MAX1363_CHAN_B(3, 2, d3m2, 19, bits, NULL, 0), \ 567 MAX1363_CHAN_B(5, 4, d5m4, 20, bits, NULL, 0), \ 568 MAX1363_CHAN_B(7, 6, d7m6, 21, bits, NULL, 0), \ 569 MAX1363_CHAN_B(9, 8, d9m8, 22, bits, NULL, 0), \ 570 MAX1363_CHAN_B(11, 10, d11m10, 23, bits, NULL, 0), \ 571 IIO_CHAN_SOFT_TIMESTAMP(24) \ 572 } 573static const struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8); 574static const struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10); 575static const struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12); 576 577static const enum max1363_modes max11607_mode_list[] = { 578 _s0, _s1, _s2, _s3, 579 s0to1, s0to2, s0to3, 580 s2to3, 581 d0m1, d2m3, d1m0, d3m2, 582 d0m1to2m3, d1m0to3m2, 583}; 584 585static const enum max1363_modes max11608_mode_list[] = { 586 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, 587 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7, 588 s6to7, 589 d0m1, d2m3, d4m5, d6m7, 590 d1m0, d3m2, d5m4, d7m6, 591 d0m1to2m3, d0m1to4m5, d0m1to6m7, 592 d1m0to3m2, d1m0to5m4, d1m0to7m6, 593}; 594 595#define MAX1363_8X_CHANS(bits) { \ 596 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \ 597 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ 598 MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \ 599 MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \ 600 MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \ 601 MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \ 602 MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \ 603 MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \ 604 MAX1363_CHAN_B(0, 1, d0m1, 8, bits, NULL, 0), \ 605 MAX1363_CHAN_B(2, 3, d2m3, 9, bits, NULL, 0), \ 606 MAX1363_CHAN_B(4, 5, d4m5, 10, bits, NULL, 0), \ 607 MAX1363_CHAN_B(6, 7, d6m7, 11, bits, NULL, 0), \ 608 MAX1363_CHAN_B(1, 0, d1m0, 12, bits, NULL, 0), \ 609 MAX1363_CHAN_B(3, 2, d3m2, 13, bits, NULL, 0), \ 610 MAX1363_CHAN_B(5, 4, d5m4, 14, bits, NULL, 0), \ 611 MAX1363_CHAN_B(7, 6, d7m6, 15, bits, NULL, 0), \ 612 IIO_CHAN_SOFT_TIMESTAMP(16) \ 613} 614static const struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8); 615static const struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10); 616static const struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12); 617 618static const enum max1363_modes max11644_mode_list[] = { 619 _s0, _s1, s0to1, d0m1, d1m0, 620}; 621 622#define MAX1363_2X_CHANS(bits) { \ 623 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \ 624 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ 625 MAX1363_CHAN_B(0, 1, d0m1, 2, bits, NULL, 0), \ 626 MAX1363_CHAN_B(1, 0, d1m0, 3, bits, NULL, 0), \ 627 IIO_CHAN_SOFT_TIMESTAMP(4) \ 628 } 629 630static const struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10); 631static const struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12); 632 633enum { max1361, 634 max1362, 635 max1363, 636 max1364, 637 max1036, 638 max1037, 639 max1038, 640 max1039, 641 max1136, 642 max1137, 643 max1138, 644 max1139, 645 max1236, 646 max1237, 647 max1238, 648 max1239, 649 max11600, 650 max11601, 651 max11602, 652 max11603, 653 max11604, 654 max11605, 655 max11606, 656 max11607, 657 max11608, 658 max11609, 659 max11610, 660 max11611, 661 max11612, 662 max11613, 663 max11614, 664 max11615, 665 max11616, 666 max11617, 667 max11644, 668 max11645, 669 max11646, 670 max11647 671}; 672 673static const int max1363_monitor_speeds[] = { 133000, 665000, 33300, 16600, 674 8300, 4200, 2000, 1000 }; 675 676static ssize_t max1363_monitor_show_freq(struct device *dev, 677 struct device_attribute *attr, 678 char *buf) 679{ 680 struct max1363_state *st = iio_priv(dev_to_iio_dev(dev)); 681 return sprintf(buf, "%d\n", max1363_monitor_speeds[st->monitor_speed]); 682} 683 684static ssize_t max1363_monitor_store_freq(struct device *dev, 685 struct device_attribute *attr, 686 const char *buf, 687 size_t len) 688{ 689 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 690 struct max1363_state *st = iio_priv(indio_dev); 691 int i, ret; 692 unsigned long val; 693 bool found = false; 694 695 ret = kstrtoul(buf, 10, &val); 696 if (ret) 697 return -EINVAL; 698 for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++) 699 if (val == max1363_monitor_speeds[i]) { 700 found = true; 701 break; 702 } 703 if (!found) 704 return -EINVAL; 705 706 scoped_guard(mutex, &st->lock) 707 st->monitor_speed = i; 708 709 return 0; 710} 711 712static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, 713 max1363_monitor_show_freq, 714 max1363_monitor_store_freq); 715 716static IIO_CONST_ATTR(sampling_frequency_available, 717 "133000 665000 33300 16600 8300 4200 2000 1000"); 718 719static int max1363_read_thresh(struct iio_dev *indio_dev, 720 const struct iio_chan_spec *chan, enum iio_event_type type, 721 enum iio_event_direction dir, enum iio_event_info info, int *val, 722 int *val2) 723{ 724 struct max1363_state *st = iio_priv(indio_dev); 725 if (dir == IIO_EV_DIR_FALLING) 726 *val = st->thresh_low[chan->channel]; 727 else 728 *val = st->thresh_high[chan->channel]; 729 return IIO_VAL_INT; 730} 731 732static int max1363_write_thresh(struct iio_dev *indio_dev, 733 const struct iio_chan_spec *chan, enum iio_event_type type, 734 enum iio_event_direction dir, enum iio_event_info info, int val, 735 int val2) 736{ 737 struct max1363_state *st = iio_priv(indio_dev); 738 /* make it handle signed correctly as well */ 739 switch (st->chip_info->bits) { 740 case 10: 741 if (val > 0x3FF) 742 return -EINVAL; 743 break; 744 case 12: 745 if (val > 0xFFF) 746 return -EINVAL; 747 break; 748 } 749 750 switch (dir) { 751 case IIO_EV_DIR_FALLING: 752 st->thresh_low[chan->channel] = val; 753 break; 754 case IIO_EV_DIR_RISING: 755 st->thresh_high[chan->channel] = val; 756 break; 757 default: 758 return -EINVAL; 759 } 760 761 return 0; 762} 763 764static const u64 max1363_event_codes[] = { 765 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0, 766 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), 767 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1, 768 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), 769 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2, 770 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), 771 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3, 772 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), 773 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0, 774 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), 775 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1, 776 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), 777 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2, 778 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), 779 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3, 780 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), 781}; 782 783static irqreturn_t max1363_event_handler(int irq, void *private) 784{ 785 struct iio_dev *indio_dev = private; 786 struct max1363_state *st = iio_priv(indio_dev); 787 s64 timestamp = iio_get_time_ns(indio_dev); 788 unsigned long mask, loc; 789 u8 rx; 790 u8 tx[2] = { st->setupbyte, 791 MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 }; 792 793 st->recv(st->client, &rx, 1); 794 mask = rx; 795 for_each_set_bit(loc, &mask, 8) 796 iio_push_event(indio_dev, max1363_event_codes[loc], timestamp); 797 st->send(st->client, tx, 2); 798 799 return IRQ_HANDLED; 800} 801 802static int max1363_read_event_config(struct iio_dev *indio_dev, 803 const struct iio_chan_spec *chan, enum iio_event_type type, 804 enum iio_event_direction dir) 805{ 806 struct max1363_state *st = iio_priv(indio_dev); 807 int val; 808 int number = chan->channel; 809 810 guard(mutex)(&st->lock); 811 if (dir == IIO_EV_DIR_FALLING) 812 val = (1 << number) & st->mask_low; 813 else 814 val = (1 << number) & st->mask_high; 815 816 return val; 817} 818 819static int max1363_monitor_mode_update(struct max1363_state *st, int enabled) 820{ 821 u8 *tx_buf; 822 int ret, i = 3, j; 823 unsigned long numelements; 824 int len; 825 const long *modemask; 826 827 if (!enabled) { 828 /* transition to buffered capture is not currently supported */ 829 st->setupbyte &= ~MAX1363_SETUP_MONITOR_SETUP; 830 st->configbyte &= ~MAX1363_SCAN_MASK; 831 st->monitor_on = false; 832 return max1363_write_basic_config(st); 833 } 834 835 /* Ensure we are in the relevant mode */ 836 st->setupbyte |= MAX1363_SETUP_MONITOR_SETUP; 837 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK 838 | MAX1363_SCAN_MASK 839 | MAX1363_SE_DE_MASK); 840 st->configbyte |= MAX1363_CONFIG_SCAN_MONITOR_MODE; 841 if ((st->mask_low | st->mask_high) & 0x0F) { 842 st->configbyte |= max1363_mode_table[s0to3].conf; 843 modemask = max1363_mode_table[s0to3].modemask; 844 } else if ((st->mask_low | st->mask_high) & 0x30) { 845 st->configbyte |= max1363_mode_table[d0m1to2m3].conf; 846 modemask = max1363_mode_table[d0m1to2m3].modemask; 847 } else { 848 st->configbyte |= max1363_mode_table[d1m0to3m2].conf; 849 modemask = max1363_mode_table[d1m0to3m2].modemask; 850 } 851 numelements = bitmap_weight(modemask, MAX1363_MAX_CHANNELS); 852 len = 3 * numelements + 3; 853 tx_buf = kmalloc(len, GFP_KERNEL); 854 if (!tx_buf) { 855 ret = -ENOMEM; 856 goto error_ret; 857 } 858 tx_buf[0] = st->configbyte; 859 tx_buf[1] = st->setupbyte; 860 tx_buf[2] = (st->monitor_speed << 1); 861 862 /* 863 * So we need to do yet another bit of nefarious scan mode 864 * setup to match what we need. 865 */ 866 for (j = 0; j < 8; j++) 867 if (test_bit(j, modemask)) { 868 /* Establish the mode is in the scan */ 869 if (st->mask_low & (1 << j)) { 870 tx_buf[i] = (st->thresh_low[j] >> 4) & 0xFF; 871 tx_buf[i + 1] = (st->thresh_low[j] << 4) & 0xF0; 872 } else if (j < 4) { 873 tx_buf[i] = 0; 874 tx_buf[i + 1] = 0; 875 } else { 876 tx_buf[i] = 0x80; 877 tx_buf[i + 1] = 0; 878 } 879 if (st->mask_high & (1 << j)) { 880 tx_buf[i + 1] |= 881 (st->thresh_high[j] >> 8) & 0x0F; 882 tx_buf[i + 2] = st->thresh_high[j] & 0xFF; 883 } else if (j < 4) { 884 tx_buf[i + 1] |= 0x0F; 885 tx_buf[i + 2] = 0xFF; 886 } else { 887 tx_buf[i + 1] |= 0x07; 888 tx_buf[i + 2] = 0xFF; 889 } 890 i += 3; 891 } 892 893 894 ret = st->send(st->client, tx_buf, len); 895 if (ret < 0) 896 goto error_ret; 897 if (ret != len) { 898 ret = -EIO; 899 goto error_ret; 900 } 901 902 /* 903 * Now that we hopefully have sensible thresholds in place it is 904 * time to turn the interrupts on. 905 * It is unclear from the data sheet if this should be necessary 906 * (i.e. whether monitor mode setup is atomic) but it appears to 907 * be in practice. 908 */ 909 tx_buf[0] = st->setupbyte; 910 tx_buf[1] = MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0; 911 ret = st->send(st->client, tx_buf, 2); 912 if (ret < 0) 913 goto error_ret; 914 if (ret != 2) { 915 ret = -EIO; 916 goto error_ret; 917 } 918 ret = 0; 919 st->monitor_on = true; 920error_ret: 921 922 kfree(tx_buf); 923 924 return ret; 925} 926 927/* 928 * To keep this manageable we always use one of 3 scan modes. 929 * Scan 0...3, 0-1,2-3 and 1-0,3-2 930 */ 931 932static inline int __max1363_check_event_mask(int thismask, int checkmask) 933{ 934 int ret = 0; 935 /* Is it unipolar */ 936 if (thismask < 4) { 937 if (checkmask & ~0x0F) { 938 ret = -EBUSY; 939 goto error_ret; 940 } 941 } else if (thismask < 6) { 942 if (checkmask & ~0x30) { 943 ret = -EBUSY; 944 goto error_ret; 945 } 946 } else if (checkmask & ~0xC0) 947 ret = -EBUSY; 948error_ret: 949 return ret; 950} 951 952static int max1363_write_event_config(struct iio_dev *indio_dev, 953 const struct iio_chan_spec *chan, enum iio_event_type type, 954 enum iio_event_direction dir, int state) 955{ 956 struct max1363_state *st = iio_priv(indio_dev); 957 958 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { 959 int number = chan->channel; 960 u16 unifiedmask; 961 int ret; 962 963 guard(mutex)(&st->lock); 964 965 unifiedmask = st->mask_low | st->mask_high; 966 if (dir == IIO_EV_DIR_FALLING) { 967 968 if (state == 0) 969 st->mask_low &= ~(1 << number); 970 else { 971 ret = __max1363_check_event_mask((1 << number), 972 unifiedmask); 973 if (ret) 974 return ret; 975 st->mask_low |= (1 << number); 976 } 977 } else { 978 if (state == 0) 979 st->mask_high &= ~(1 << number); 980 else { 981 ret = __max1363_check_event_mask((1 << number), 982 unifiedmask); 983 if (ret) 984 return ret; 985 st->mask_high |= (1 << number); 986 } 987 } 988 } 989 max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low)); 990 991 return 0; 992} 993 994/* 995 * As with scan_elements, only certain sets of these can 996 * be combined. 997 */ 998static struct attribute *max1363_event_attributes[] = { 999 &iio_dev_attr_sampling_frequency.dev_attr.attr, 1000 &iio_const_attr_sampling_frequency_available.dev_attr.attr, 1001 NULL, 1002}; 1003 1004static const struct attribute_group max1363_event_attribute_group = { 1005 .attrs = max1363_event_attributes, 1006}; 1007 1008static int max1363_update_scan_mode(struct iio_dev *indio_dev, 1009 const unsigned long *scan_mask) 1010{ 1011 struct max1363_state *st = iio_priv(indio_dev); 1012 1013 /* 1014 * Need to figure out the current mode based upon the requested 1015 * scan mask in iio_dev 1016 */ 1017 st->current_mode = max1363_match_mode(scan_mask, st->chip_info); 1018 if (!st->current_mode) 1019 return -EINVAL; 1020 max1363_set_scan_mode(st); 1021 return 0; 1022} 1023 1024static const struct iio_info max1238_info = { 1025 .read_raw = &max1363_read_raw, 1026 .update_scan_mode = &max1363_update_scan_mode, 1027}; 1028 1029static const struct iio_info max1363_info = { 1030 .read_event_value = &max1363_read_thresh, 1031 .write_event_value = &max1363_write_thresh, 1032 .read_event_config = &max1363_read_event_config, 1033 .write_event_config = &max1363_write_event_config, 1034 .read_raw = &max1363_read_raw, 1035 .update_scan_mode = &max1363_update_scan_mode, 1036 .event_attrs = &max1363_event_attribute_group, 1037}; 1038 1039/* max1363 and max1368 tested - rest from data sheet */ 1040static const struct max1363_chip_info max1363_chip_info_tbl[] = { 1041 [max1361] = { 1042 .bits = 10, 1043 .int_vref_mv = 2048, 1044 .mode_list = max1363_mode_list, 1045 .num_modes = ARRAY_SIZE(max1363_mode_list), 1046 .default_mode = s0to3, 1047 .channels = max1361_channels, 1048 .num_channels = ARRAY_SIZE(max1361_channels), 1049 .info = &max1363_info, 1050 }, 1051 [max1362] = { 1052 .bits = 10, 1053 .int_vref_mv = 4096, 1054 .mode_list = max1363_mode_list, 1055 .num_modes = ARRAY_SIZE(max1363_mode_list), 1056 .default_mode = s0to3, 1057 .channels = max1361_channels, 1058 .num_channels = ARRAY_SIZE(max1361_channels), 1059 .info = &max1363_info, 1060 }, 1061 [max1363] = { 1062 .bits = 12, 1063 .int_vref_mv = 2048, 1064 .mode_list = max1363_mode_list, 1065 .num_modes = ARRAY_SIZE(max1363_mode_list), 1066 .default_mode = s0to3, 1067 .channels = max1363_channels, 1068 .num_channels = ARRAY_SIZE(max1363_channels), 1069 .info = &max1363_info, 1070 }, 1071 [max1364] = { 1072 .bits = 12, 1073 .int_vref_mv = 4096, 1074 .mode_list = max1363_mode_list, 1075 .num_modes = ARRAY_SIZE(max1363_mode_list), 1076 .default_mode = s0to3, 1077 .channels = max1363_channels, 1078 .num_channels = ARRAY_SIZE(max1363_channels), 1079 .info = &max1363_info, 1080 }, 1081 [max1036] = { 1082 .bits = 8, 1083 .int_vref_mv = 4096, 1084 .mode_list = max1236_mode_list, 1085 .num_modes = ARRAY_SIZE(max1236_mode_list), 1086 .default_mode = s0to3, 1087 .info = &max1238_info, 1088 .channels = max1036_channels, 1089 .num_channels = ARRAY_SIZE(max1036_channels), 1090 }, 1091 [max1037] = { 1092 .bits = 8, 1093 .int_vref_mv = 2048, 1094 .mode_list = max1236_mode_list, 1095 .num_modes = ARRAY_SIZE(max1236_mode_list), 1096 .default_mode = s0to3, 1097 .info = &max1238_info, 1098 .channels = max1036_channels, 1099 .num_channels = ARRAY_SIZE(max1036_channels), 1100 }, 1101 [max1038] = { 1102 .bits = 8, 1103 .int_vref_mv = 4096, 1104 .mode_list = max1238_mode_list, 1105 .num_modes = ARRAY_SIZE(max1238_mode_list), 1106 .default_mode = s0to11, 1107 .info = &max1238_info, 1108 .channels = max1038_channels, 1109 .num_channels = ARRAY_SIZE(max1038_channels), 1110 }, 1111 [max1039] = { 1112 .bits = 8, 1113 .int_vref_mv = 2048, 1114 .mode_list = max1238_mode_list, 1115 .num_modes = ARRAY_SIZE(max1238_mode_list), 1116 .default_mode = s0to11, 1117 .info = &max1238_info, 1118 .channels = max1038_channels, 1119 .num_channels = ARRAY_SIZE(max1038_channels), 1120 }, 1121 [max1136] = { 1122 .bits = 10, 1123 .int_vref_mv = 4096, 1124 .mode_list = max1236_mode_list, 1125 .num_modes = ARRAY_SIZE(max1236_mode_list), 1126 .default_mode = s0to3, 1127 .info = &max1238_info, 1128 .channels = max1136_channels, 1129 .num_channels = ARRAY_SIZE(max1136_channels), 1130 }, 1131 [max1137] = { 1132 .bits = 10, 1133 .int_vref_mv = 2048, 1134 .mode_list = max1236_mode_list, 1135 .num_modes = ARRAY_SIZE(max1236_mode_list), 1136 .default_mode = s0to3, 1137 .info = &max1238_info, 1138 .channels = max1136_channels, 1139 .num_channels = ARRAY_SIZE(max1136_channels), 1140 }, 1141 [max1138] = { 1142 .bits = 10, 1143 .int_vref_mv = 4096, 1144 .mode_list = max1238_mode_list, 1145 .num_modes = ARRAY_SIZE(max1238_mode_list), 1146 .default_mode = s0to11, 1147 .info = &max1238_info, 1148 .channels = max1138_channels, 1149 .num_channels = ARRAY_SIZE(max1138_channels), 1150 }, 1151 [max1139] = { 1152 .bits = 10, 1153 .int_vref_mv = 2048, 1154 .mode_list = max1238_mode_list, 1155 .num_modes = ARRAY_SIZE(max1238_mode_list), 1156 .default_mode = s0to11, 1157 .info = &max1238_info, 1158 .channels = max1138_channels, 1159 .num_channels = ARRAY_SIZE(max1138_channels), 1160 }, 1161 [max1236] = { 1162 .bits = 12, 1163 .int_vref_mv = 4096, 1164 .mode_list = max1236_mode_list, 1165 .num_modes = ARRAY_SIZE(max1236_mode_list), 1166 .default_mode = s0to3, 1167 .info = &max1238_info, 1168 .channels = max1236_channels, 1169 .num_channels = ARRAY_SIZE(max1236_channels), 1170 }, 1171 [max1237] = { 1172 .bits = 12, 1173 .int_vref_mv = 2048, 1174 .mode_list = max1236_mode_list, 1175 .num_modes = ARRAY_SIZE(max1236_mode_list), 1176 .default_mode = s0to3, 1177 .info = &max1238_info, 1178 .channels = max1236_channels, 1179 .num_channels = ARRAY_SIZE(max1236_channels), 1180 }, 1181 [max1238] = { 1182 .bits = 12, 1183 .int_vref_mv = 4096, 1184 .mode_list = max1238_mode_list, 1185 .num_modes = ARRAY_SIZE(max1238_mode_list), 1186 .default_mode = s0to11, 1187 .info = &max1238_info, 1188 .channels = max1238_channels, 1189 .num_channels = ARRAY_SIZE(max1238_channels), 1190 }, 1191 [max1239] = { 1192 .bits = 12, 1193 .int_vref_mv = 2048, 1194 .mode_list = max1238_mode_list, 1195 .num_modes = ARRAY_SIZE(max1238_mode_list), 1196 .default_mode = s0to11, 1197 .info = &max1238_info, 1198 .channels = max1238_channels, 1199 .num_channels = ARRAY_SIZE(max1238_channels), 1200 }, 1201 [max11600] = { 1202 .bits = 8, 1203 .int_vref_mv = 4096, 1204 .mode_list = max11607_mode_list, 1205 .num_modes = ARRAY_SIZE(max11607_mode_list), 1206 .default_mode = s0to3, 1207 .info = &max1238_info, 1208 .channels = max1036_channels, 1209 .num_channels = ARRAY_SIZE(max1036_channels), 1210 }, 1211 [max11601] = { 1212 .bits = 8, 1213 .int_vref_mv = 2048, 1214 .mode_list = max11607_mode_list, 1215 .num_modes = ARRAY_SIZE(max11607_mode_list), 1216 .default_mode = s0to3, 1217 .info = &max1238_info, 1218 .channels = max1036_channels, 1219 .num_channels = ARRAY_SIZE(max1036_channels), 1220 }, 1221 [max11602] = { 1222 .bits = 8, 1223 .int_vref_mv = 4096, 1224 .mode_list = max11608_mode_list, 1225 .num_modes = ARRAY_SIZE(max11608_mode_list), 1226 .default_mode = s0to7, 1227 .info = &max1238_info, 1228 .channels = max11602_channels, 1229 .num_channels = ARRAY_SIZE(max11602_channels), 1230 }, 1231 [max11603] = { 1232 .bits = 8, 1233 .int_vref_mv = 2048, 1234 .mode_list = max11608_mode_list, 1235 .num_modes = ARRAY_SIZE(max11608_mode_list), 1236 .default_mode = s0to7, 1237 .info = &max1238_info, 1238 .channels = max11602_channels, 1239 .num_channels = ARRAY_SIZE(max11602_channels), 1240 }, 1241 [max11604] = { 1242 .bits = 8, 1243 .int_vref_mv = 4096, 1244 .mode_list = max1238_mode_list, 1245 .num_modes = ARRAY_SIZE(max1238_mode_list), 1246 .default_mode = s0to11, 1247 .info = &max1238_info, 1248 .channels = max1038_channels, 1249 .num_channels = ARRAY_SIZE(max1038_channels), 1250 }, 1251 [max11605] = { 1252 .bits = 8, 1253 .int_vref_mv = 2048, 1254 .mode_list = max1238_mode_list, 1255 .num_modes = ARRAY_SIZE(max1238_mode_list), 1256 .default_mode = s0to11, 1257 .info = &max1238_info, 1258 .channels = max1038_channels, 1259 .num_channels = ARRAY_SIZE(max1038_channels), 1260 }, 1261 [max11606] = { 1262 .bits = 10, 1263 .int_vref_mv = 4096, 1264 .mode_list = max11607_mode_list, 1265 .num_modes = ARRAY_SIZE(max11607_mode_list), 1266 .default_mode = s0to3, 1267 .info = &max1238_info, 1268 .channels = max1136_channels, 1269 .num_channels = ARRAY_SIZE(max1136_channels), 1270 }, 1271 [max11607] = { 1272 .bits = 10, 1273 .int_vref_mv = 2048, 1274 .mode_list = max11607_mode_list, 1275 .num_modes = ARRAY_SIZE(max11607_mode_list), 1276 .default_mode = s0to3, 1277 .info = &max1238_info, 1278 .channels = max1136_channels, 1279 .num_channels = ARRAY_SIZE(max1136_channels), 1280 }, 1281 [max11608] = { 1282 .bits = 10, 1283 .int_vref_mv = 4096, 1284 .mode_list = max11608_mode_list, 1285 .num_modes = ARRAY_SIZE(max11608_mode_list), 1286 .default_mode = s0to7, 1287 .info = &max1238_info, 1288 .channels = max11608_channels, 1289 .num_channels = ARRAY_SIZE(max11608_channels), 1290 }, 1291 [max11609] = { 1292 .bits = 10, 1293 .int_vref_mv = 2048, 1294 .mode_list = max11608_mode_list, 1295 .num_modes = ARRAY_SIZE(max11608_mode_list), 1296 .default_mode = s0to7, 1297 .info = &max1238_info, 1298 .channels = max11608_channels, 1299 .num_channels = ARRAY_SIZE(max11608_channels), 1300 }, 1301 [max11610] = { 1302 .bits = 10, 1303 .int_vref_mv = 4096, 1304 .mode_list = max1238_mode_list, 1305 .num_modes = ARRAY_SIZE(max1238_mode_list), 1306 .default_mode = s0to11, 1307 .info = &max1238_info, 1308 .channels = max1138_channels, 1309 .num_channels = ARRAY_SIZE(max1138_channels), 1310 }, 1311 [max11611] = { 1312 .bits = 10, 1313 .int_vref_mv = 2048, 1314 .mode_list = max1238_mode_list, 1315 .num_modes = ARRAY_SIZE(max1238_mode_list), 1316 .default_mode = s0to11, 1317 .info = &max1238_info, 1318 .channels = max1138_channels, 1319 .num_channels = ARRAY_SIZE(max1138_channels), 1320 }, 1321 [max11612] = { 1322 .bits = 12, 1323 .int_vref_mv = 4096, 1324 .mode_list = max11607_mode_list, 1325 .num_modes = ARRAY_SIZE(max11607_mode_list), 1326 .default_mode = s0to3, 1327 .info = &max1238_info, 1328 .channels = max1363_channels, 1329 .num_channels = ARRAY_SIZE(max1363_channels), 1330 }, 1331 [max11613] = { 1332 .bits = 12, 1333 .int_vref_mv = 2048, 1334 .mode_list = max11607_mode_list, 1335 .num_modes = ARRAY_SIZE(max11607_mode_list), 1336 .default_mode = s0to3, 1337 .info = &max1238_info, 1338 .channels = max1363_channels, 1339 .num_channels = ARRAY_SIZE(max1363_channels), 1340 }, 1341 [max11614] = { 1342 .bits = 12, 1343 .int_vref_mv = 4096, 1344 .mode_list = max11608_mode_list, 1345 .num_modes = ARRAY_SIZE(max11608_mode_list), 1346 .default_mode = s0to7, 1347 .info = &max1238_info, 1348 .channels = max11614_channels, 1349 .num_channels = ARRAY_SIZE(max11614_channels), 1350 }, 1351 [max11615] = { 1352 .bits = 12, 1353 .int_vref_mv = 2048, 1354 .mode_list = max11608_mode_list, 1355 .num_modes = ARRAY_SIZE(max11608_mode_list), 1356 .default_mode = s0to7, 1357 .info = &max1238_info, 1358 .channels = max11614_channels, 1359 .num_channels = ARRAY_SIZE(max11614_channels), 1360 }, 1361 [max11616] = { 1362 .bits = 12, 1363 .int_vref_mv = 4096, 1364 .mode_list = max1238_mode_list, 1365 .num_modes = ARRAY_SIZE(max1238_mode_list), 1366 .default_mode = s0to11, 1367 .info = &max1238_info, 1368 .channels = max1238_channels, 1369 .num_channels = ARRAY_SIZE(max1238_channels), 1370 }, 1371 [max11617] = { 1372 .bits = 12, 1373 .int_vref_mv = 2048, 1374 .mode_list = max1238_mode_list, 1375 .num_modes = ARRAY_SIZE(max1238_mode_list), 1376 .default_mode = s0to11, 1377 .info = &max1238_info, 1378 .channels = max1238_channels, 1379 .num_channels = ARRAY_SIZE(max1238_channels), 1380 }, 1381 [max11644] = { 1382 .bits = 12, 1383 .int_vref_mv = 4096, 1384 .mode_list = max11644_mode_list, 1385 .num_modes = ARRAY_SIZE(max11644_mode_list), 1386 .default_mode = s0to1, 1387 .info = &max1238_info, 1388 .channels = max11644_channels, 1389 .num_channels = ARRAY_SIZE(max11644_channels), 1390 }, 1391 [max11645] = { 1392 .bits = 12, 1393 .int_vref_mv = 2048, 1394 .mode_list = max11644_mode_list, 1395 .num_modes = ARRAY_SIZE(max11644_mode_list), 1396 .default_mode = s0to1, 1397 .info = &max1238_info, 1398 .channels = max11644_channels, 1399 .num_channels = ARRAY_SIZE(max11644_channels), 1400 }, 1401 [max11646] = { 1402 .bits = 10, 1403 .int_vref_mv = 4096, 1404 .mode_list = max11644_mode_list, 1405 .num_modes = ARRAY_SIZE(max11644_mode_list), 1406 .default_mode = s0to1, 1407 .info = &max1238_info, 1408 .channels = max11646_channels, 1409 .num_channels = ARRAY_SIZE(max11646_channels), 1410 }, 1411 [max11647] = { 1412 .bits = 10, 1413 .int_vref_mv = 2048, 1414 .mode_list = max11644_mode_list, 1415 .num_modes = ARRAY_SIZE(max11644_mode_list), 1416 .default_mode = s0to1, 1417 .info = &max1238_info, 1418 .channels = max11646_channels, 1419 .num_channels = ARRAY_SIZE(max11646_channels), 1420 }, 1421}; 1422 1423static int max1363_initial_setup(struct max1363_state *st) 1424{ 1425 st->setupbyte = MAX1363_SETUP_INT_CLOCK 1426 | MAX1363_SETUP_UNIPOLAR 1427 | MAX1363_SETUP_NORESET; 1428 1429 if (st->vref) 1430 st->setupbyte |= MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF; 1431 else 1432 st->setupbyte |= MAX1363_SETUP_POWER_UP_INT_REF 1433 | MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT; 1434 1435 /* Set scan mode writes the config anyway so wait until then */ 1436 st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte); 1437 st->current_mode = &max1363_mode_table[st->chip_info->default_mode]; 1438 st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte); 1439 1440 return max1363_set_scan_mode(st); 1441} 1442 1443static int max1363_alloc_scan_masks(struct iio_dev *indio_dev) 1444{ 1445 struct max1363_state *st = iio_priv(indio_dev); 1446 unsigned long *masks; 1447 int i; 1448 1449 masks = devm_kzalloc(&indio_dev->dev, 1450 array3_size(BITS_TO_LONGS(MAX1363_MAX_CHANNELS), 1451 sizeof(long), 1452 st->chip_info->num_modes + 1), 1453 GFP_KERNEL); 1454 if (!masks) 1455 return -ENOMEM; 1456 1457 for (i = 0; i < st->chip_info->num_modes; i++) 1458 bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i, 1459 max1363_mode_table[st->chip_info->mode_list[i]] 1460 .modemask, MAX1363_MAX_CHANNELS); 1461 1462 indio_dev->available_scan_masks = masks; 1463 1464 return 0; 1465} 1466 1467static irqreturn_t max1363_trigger_handler(int irq, void *p) 1468{ 1469 struct iio_poll_func *pf = p; 1470 struct iio_dev *indio_dev = pf->indio_dev; 1471 struct max1363_state *st = iio_priv(indio_dev); 1472 __u8 *rxbuf; 1473 int b_sent; 1474 size_t d_size; 1475 unsigned long numvals = bitmap_weight(st->current_mode->modemask, 1476 MAX1363_MAX_CHANNELS); 1477 1478 /* Ensure the timestamp is 8 byte aligned */ 1479 if (st->chip_info->bits != 8) 1480 d_size = numvals*2; 1481 else 1482 d_size = numvals; 1483 if (indio_dev->scan_timestamp) { 1484 d_size += sizeof(s64); 1485 if (d_size % sizeof(s64)) 1486 d_size += sizeof(s64) - (d_size % sizeof(s64)); 1487 } 1488 /* Monitor mode prevents reading. Whilst not currently implemented 1489 * might as well have this test in here in the meantime as it does 1490 * no harm. 1491 */ 1492 if (numvals == 0) 1493 goto done; 1494 1495 rxbuf = kmalloc(d_size, GFP_KERNEL); 1496 if (rxbuf == NULL) 1497 goto done; 1498 if (st->chip_info->bits != 8) 1499 b_sent = st->recv(st->client, rxbuf, numvals * 2); 1500 else 1501 b_sent = st->recv(st->client, rxbuf, numvals); 1502 if (b_sent < 0) 1503 goto done_free; 1504 1505 iio_push_to_buffers_with_timestamp(indio_dev, rxbuf, 1506 iio_get_time_ns(indio_dev)); 1507 1508done_free: 1509 kfree(rxbuf); 1510done: 1511 iio_trigger_notify_done(indio_dev->trig); 1512 1513 return IRQ_HANDLED; 1514} 1515 1516#define MAX1363_COMPATIBLE(of_compatible, cfg) { \ 1517 .compatible = of_compatible, \ 1518 .data = &max1363_chip_info_tbl[cfg], \ 1519} 1520 1521static const struct of_device_id max1363_of_match[] = { 1522 MAX1363_COMPATIBLE("maxim,max1361", max1361), 1523 MAX1363_COMPATIBLE("maxim,max1362", max1362), 1524 MAX1363_COMPATIBLE("maxim,max1363", max1363), 1525 MAX1363_COMPATIBLE("maxim,max1364", max1364), 1526 MAX1363_COMPATIBLE("maxim,max1036", max1036), 1527 MAX1363_COMPATIBLE("maxim,max1037", max1037), 1528 MAX1363_COMPATIBLE("maxim,max1038", max1038), 1529 MAX1363_COMPATIBLE("maxim,max1039", max1039), 1530 MAX1363_COMPATIBLE("maxim,max1136", max1136), 1531 MAX1363_COMPATIBLE("maxim,max1137", max1137), 1532 MAX1363_COMPATIBLE("maxim,max1138", max1138), 1533 MAX1363_COMPATIBLE("maxim,max1139", max1139), 1534 MAX1363_COMPATIBLE("maxim,max1236", max1236), 1535 MAX1363_COMPATIBLE("maxim,max1237", max1237), 1536 MAX1363_COMPATIBLE("maxim,max1238", max1238), 1537 MAX1363_COMPATIBLE("maxim,max1239", max1239), 1538 MAX1363_COMPATIBLE("maxim,max11600", max11600), 1539 MAX1363_COMPATIBLE("maxim,max11601", max11601), 1540 MAX1363_COMPATIBLE("maxim,max11602", max11602), 1541 MAX1363_COMPATIBLE("maxim,max11603", max11603), 1542 MAX1363_COMPATIBLE("maxim,max11604", max11604), 1543 MAX1363_COMPATIBLE("maxim,max11605", max11605), 1544 MAX1363_COMPATIBLE("maxim,max11606", max11606), 1545 MAX1363_COMPATIBLE("maxim,max11607", max11607), 1546 MAX1363_COMPATIBLE("maxim,max11608", max11608), 1547 MAX1363_COMPATIBLE("maxim,max11609", max11609), 1548 MAX1363_COMPATIBLE("maxim,max11610", max11610), 1549 MAX1363_COMPATIBLE("maxim,max11611", max11611), 1550 MAX1363_COMPATIBLE("maxim,max11612", max11612), 1551 MAX1363_COMPATIBLE("maxim,max11613", max11613), 1552 MAX1363_COMPATIBLE("maxim,max11614", max11614), 1553 MAX1363_COMPATIBLE("maxim,max11615", max11615), 1554 MAX1363_COMPATIBLE("maxim,max11616", max11616), 1555 MAX1363_COMPATIBLE("maxim,max11617", max11617), 1556 MAX1363_COMPATIBLE("maxim,max11644", max11644), 1557 MAX1363_COMPATIBLE("maxim,max11645", max11645), 1558 MAX1363_COMPATIBLE("maxim,max11646", max11646), 1559 MAX1363_COMPATIBLE("maxim,max11647", max11647), 1560 { /* sentinel */ } 1561}; 1562MODULE_DEVICE_TABLE(of, max1363_of_match); 1563 1564static void max1363_reg_disable(void *reg) 1565{ 1566 regulator_disable(reg); 1567} 1568 1569static int max1363_probe(struct i2c_client *client) 1570{ 1571 const struct i2c_device_id *id = i2c_client_get_device_id(client); 1572 int ret; 1573 struct max1363_state *st; 1574 struct iio_dev *indio_dev; 1575 struct regulator *vref; 1576 1577 indio_dev = devm_iio_device_alloc(&client->dev, 1578 sizeof(struct max1363_state)); 1579 if (!indio_dev) 1580 return -ENOMEM; 1581 1582 st = iio_priv(indio_dev); 1583 1584 mutex_init(&st->lock); 1585 ret = devm_regulator_get_enable(&client->dev, "vcc"); 1586 if (ret) 1587 return ret; 1588 1589 st->chip_info = i2c_get_match_data(client); 1590 st->client = client; 1591 1592 st->vref_uv = st->chip_info->int_vref_mv * 1000; 1593 vref = devm_regulator_get_optional(&client->dev, "vref"); 1594 if (!IS_ERR(vref)) { 1595 int vref_uv; 1596 1597 ret = regulator_enable(vref); 1598 if (ret) 1599 return ret; 1600 1601 ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, vref); 1602 if (ret) 1603 return ret; 1604 1605 st->vref = vref; 1606 vref_uv = regulator_get_voltage(vref); 1607 if (vref_uv <= 0) 1608 return -EINVAL; 1609 1610 st->vref_uv = vref_uv; 1611 } 1612 1613 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1614 st->send = i2c_master_send; 1615 st->recv = i2c_master_recv; 1616 } else if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE) 1617 && st->chip_info->bits == 8) { 1618 st->send = max1363_smbus_send; 1619 st->recv = max1363_smbus_recv; 1620 } else { 1621 return -EOPNOTSUPP; 1622 } 1623 1624 ret = max1363_alloc_scan_masks(indio_dev); 1625 if (ret) 1626 return ret; 1627 1628 indio_dev->name = id->name; 1629 indio_dev->channels = st->chip_info->channels; 1630 indio_dev->num_channels = st->chip_info->num_channels; 1631 indio_dev->info = st->chip_info->info; 1632 indio_dev->modes = INDIO_DIRECT_MODE; 1633 ret = max1363_initial_setup(st); 1634 if (ret < 0) 1635 return ret; 1636 1637 ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, 1638 &max1363_trigger_handler, NULL); 1639 if (ret) 1640 return ret; 1641 1642 if (client->irq) { 1643 ret = devm_request_threaded_irq(&client->dev, st->client->irq, 1644 NULL, 1645 &max1363_event_handler, 1646 IRQF_TRIGGER_RISING | IRQF_ONESHOT, 1647 "max1363_event", 1648 indio_dev); 1649 1650 if (ret) 1651 return ret; 1652 } 1653 1654 return devm_iio_device_register(&client->dev, indio_dev); 1655} 1656 1657#define MAX1363_ID_TABLE(_name, cfg) { \ 1658 .name = _name, \ 1659 .driver_data = (kernel_ulong_t)&max1363_chip_info_tbl[cfg], \ 1660} 1661 1662static const struct i2c_device_id max1363_id[] = { 1663 MAX1363_ID_TABLE("max1361", max1361), 1664 MAX1363_ID_TABLE("max1362", max1362), 1665 MAX1363_ID_TABLE("max1363", max1363), 1666 MAX1363_ID_TABLE("max1364", max1364), 1667 MAX1363_ID_TABLE("max1036", max1036), 1668 MAX1363_ID_TABLE("max1037", max1037), 1669 MAX1363_ID_TABLE("max1038", max1038), 1670 MAX1363_ID_TABLE("max1039", max1039), 1671 MAX1363_ID_TABLE("max1136", max1136), 1672 MAX1363_ID_TABLE("max1137", max1137), 1673 MAX1363_ID_TABLE("max1138", max1138), 1674 MAX1363_ID_TABLE("max1139", max1139), 1675 MAX1363_ID_TABLE("max1236", max1236), 1676 MAX1363_ID_TABLE("max1237", max1237), 1677 MAX1363_ID_TABLE("max1238", max1238), 1678 MAX1363_ID_TABLE("max1239", max1239), 1679 MAX1363_ID_TABLE("max11600", max11600), 1680 MAX1363_ID_TABLE("max11601", max11601), 1681 MAX1363_ID_TABLE("max11602", max11602), 1682 MAX1363_ID_TABLE("max11603", max11603), 1683 MAX1363_ID_TABLE("max11604", max11604), 1684 MAX1363_ID_TABLE("max11605", max11605), 1685 MAX1363_ID_TABLE("max11606", max11606), 1686 MAX1363_ID_TABLE("max11607", max11607), 1687 MAX1363_ID_TABLE("max11608", max11608), 1688 MAX1363_ID_TABLE("max11609", max11609), 1689 MAX1363_ID_TABLE("max11610", max11610), 1690 MAX1363_ID_TABLE("max11611", max11611), 1691 MAX1363_ID_TABLE("max11612", max11612), 1692 MAX1363_ID_TABLE("max11613", max11613), 1693 MAX1363_ID_TABLE("max11614", max11614), 1694 MAX1363_ID_TABLE("max11615", max11615), 1695 MAX1363_ID_TABLE("max11616", max11616), 1696 MAX1363_ID_TABLE("max11617", max11617), 1697 MAX1363_ID_TABLE("max11644", max11644), 1698 MAX1363_ID_TABLE("max11645", max11645), 1699 MAX1363_ID_TABLE("max11646", max11646), 1700 MAX1363_ID_TABLE("max11647", max11647), 1701 { /* sentinel */ } 1702}; 1703 1704MODULE_DEVICE_TABLE(i2c, max1363_id); 1705 1706static struct i2c_driver max1363_driver = { 1707 .driver = { 1708 .name = "max1363", 1709 .of_match_table = max1363_of_match, 1710 }, 1711 .probe = max1363_probe, 1712 .id_table = max1363_id, 1713}; 1714module_i2c_driver(max1363_driver); 1715 1716MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); 1717MODULE_DESCRIPTION("Maxim 1363 ADC"); 1718MODULE_LICENSE("GPL v2"); 1719