drivers/misc/smpro-errmon.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Ampere Computing SoC's SMpro Error Monitoring Driver
   4  *
   5  * Copyright (c) 2022, Ampere Computing LLC
   6  *
   7  */
   8
   9 #include <linux/mod_devicetable.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/regmap.h>
  13
  14 /* GPI RAS Error Registers */
  15 #define GPI_RAS_ERR             0x7E
  16
  17 /* Core and L2C Error Registers */
  18 #define CORE_CE_ERR_CNT         0x80
  19 #define CORE_CE_ERR_LEN         0x81
  20 #define CORE_CE_ERR_DATA        0x82
  21 #define CORE_UE_ERR_CNT         0x83
  22 #define CORE_UE_ERR_LEN         0x84
  23 #define CORE_UE_ERR_DATA        0x85
  24
  25 /* Memory Error Registers */
  26 #define MEM_CE_ERR_CNT          0x90
  27 #define MEM_CE_ERR_LEN          0x91
  28 #define MEM_CE_ERR_DATA         0x92
  29 #define MEM_UE_ERR_CNT          0x93
  30 #define MEM_UE_ERR_LEN          0x94
  31 #define MEM_UE_ERR_DATA         0x95
  32
  33 /* RAS Error/Warning Registers */
  34 #define ERR_SMPRO_TYPE          0xA0
  35 #define ERR_PMPRO_TYPE          0xA1
  36 #define ERR_SMPRO_INFO_LO       0xA2
  37 #define ERR_SMPRO_INFO_HI       0xA3
  38 #define ERR_SMPRO_DATA_LO       0xA4
  39 #define ERR_SMPRO_DATA_HI       0xA5
  40 #define WARN_SMPRO_INFO_LO      0xAA
  41 #define WARN_SMPRO_INFO_HI      0xAB
  42 #define ERR_PMPRO_INFO_LO       0xA6
  43 #define ERR_PMPRO_INFO_HI       0xA7
  44 #define ERR_PMPRO_DATA_LO       0xA8
  45 #define ERR_PMPRO_DATA_HI       0xA9
  46 #define WARN_PMPRO_INFO_LO      0xAC
  47 #define WARN_PMPRO_INFO_HI      0xAD
  48
  49 /* Boot Stage Register */
  50 #define BOOTSTAGE               0xB0
  51 #define DIMM_SYNDROME_SEL       0xB4
  52 #define DIMM_SYNDROME_ERR       0xB5
  53 #define DIMM_SYNDROME_STAGE     4
  54
  55 /* PCIE Error Registers */
  56 #define PCIE_CE_ERR_CNT         0xC0
  57 #define PCIE_CE_ERR_LEN         0xC1
  58 #define PCIE_CE_ERR_DATA        0xC2
  59 #define PCIE_UE_ERR_CNT         0xC3
  60 #define PCIE_UE_ERR_LEN         0xC4
  61 #define PCIE_UE_ERR_DATA        0xC5
  62
  63 /* Other Error Registers */
  64 #define OTHER_CE_ERR_CNT        0xD0
  65 #define OTHER_CE_ERR_LEN        0xD1
  66 #define OTHER_CE_ERR_DATA       0xD2
  67 #define OTHER_UE_ERR_CNT        0xD8
  68 #define OTHER_UE_ERR_LEN        0xD9
  69 #define OTHER_UE_ERR_DATA       0xDA
  70
  71 /* Event Data Registers */
  72 #define VRD_WARN_FAULT_EVENT_DATA       0x78
  73 #define VRD_HOT_EVENT_DATA              0x79
  74 #define DIMM_HOT_EVENT_DATA             0x7A
  75 #define DIMM_2X_REFRESH_EVENT_DATA      0x96
  76
  77 #define MAX_READ_BLOCK_LENGTH   48
  78
  79 #define RAS_SMPRO_ERR           0
  80 #define RAS_PMPRO_ERR           1
  81
  82 enum RAS_48BYTES_ERR_TYPES {
  83         CORE_CE_ERR,
  84         CORE_UE_ERR,
  85         MEM_CE_ERR,
  86         MEM_UE_ERR,
  87         PCIE_CE_ERR,
  88         PCIE_UE_ERR,
  89         OTHER_CE_ERR,
  90         OTHER_UE_ERR,
  91         NUM_48BYTES_ERR_TYPE,
  92 };
  93
  94 struct smpro_error_hdr {
  95         u8 count;       /* Number of the RAS errors */
  96         u8 len;         /* Number of data bytes */
  97         u8 data;        /* Start of 48-byte data */
  98         u8 max_cnt;     /* Max num of errors */
  99 };
 100
 101 /*
 102  * Included Address of registers to get Count, Length of data and Data
 103  * of the 48 bytes error data
 104  */
 105 static struct smpro_error_hdr smpro_error_table[] = {
 106         [CORE_CE_ERR] = {
 107                 .count = CORE_CE_ERR_CNT,
 108                 .len = CORE_CE_ERR_LEN,
 109                 .data = CORE_CE_ERR_DATA,
 110                 .max_cnt = 32
 111         },
 112         [CORE_UE_ERR] = {
 113                 .count = CORE_UE_ERR_CNT,
 114                 .len = CORE_UE_ERR_LEN,
 115                 .data = CORE_UE_ERR_DATA,
 116                 .max_cnt = 32
 117         },
 118         [MEM_CE_ERR] = {
 119                 .count = MEM_CE_ERR_CNT,
 120                 .len = MEM_CE_ERR_LEN,
 121                 .data = MEM_CE_ERR_DATA,
 122                 .max_cnt = 16
 123         },
 124         [MEM_UE_ERR] = {
 125                 .count = MEM_UE_ERR_CNT,
 126                 .len = MEM_UE_ERR_LEN,
 127                 .data = MEM_UE_ERR_DATA,
 128                 .max_cnt = 16
 129         },
 130         [PCIE_CE_ERR] = {
 131                 .count = PCIE_CE_ERR_CNT,
 132                 .len = PCIE_CE_ERR_LEN,
 133                 .data = PCIE_CE_ERR_DATA,
 134                 .max_cnt = 96
 135         },
 136         [PCIE_UE_ERR] = {
 137                 .count = PCIE_UE_ERR_CNT,
 138                 .len = PCIE_UE_ERR_LEN,
 139                 .data = PCIE_UE_ERR_DATA,
 140                 .max_cnt = 96
 141         },
 142         [OTHER_CE_ERR] = {
 143                 .count = OTHER_CE_ERR_CNT,
 144                 .len = OTHER_CE_ERR_LEN,
 145                 .data = OTHER_CE_ERR_DATA,
 146                 .max_cnt = 8
 147         },
 148         [OTHER_UE_ERR] = {
 149                 .count = OTHER_UE_ERR_CNT,
 150                 .len = OTHER_UE_ERR_LEN,
 151                 .data = OTHER_UE_ERR_DATA,
 152                 .max_cnt = 8
 153         },
 154 };
 155
 156 /*
 157  * List of SCP registers which are used to get
 158  * one type of RAS Internal errors.
 159  */
 160 struct smpro_int_error_hdr {
 161         u8 type;
 162         u8 info_l;
 163         u8 info_h;
 164         u8 data_l;
 165         u8 data_h;
 166         u8 warn_l;
 167         u8 warn_h;
 168 };
 169
 170 static struct smpro_int_error_hdr list_smpro_int_error_hdr[] = {
 171         [RAS_SMPRO_ERR] = {
 172                 .type = ERR_SMPRO_TYPE,
 173                 .info_l = ERR_SMPRO_INFO_LO,
 174                 .info_h = ERR_SMPRO_INFO_HI,
 175                 .data_l = ERR_SMPRO_DATA_LO,
 176                 .data_h = ERR_SMPRO_DATA_HI,
 177                 .warn_l = WARN_SMPRO_INFO_LO,
 178                 .warn_h = WARN_SMPRO_INFO_HI,
 179         },
 180         [RAS_PMPRO_ERR] = {
 181                 .type = ERR_PMPRO_TYPE,
 182                 .info_l = ERR_PMPRO_INFO_LO,
 183                 .info_h = ERR_PMPRO_INFO_HI,
 184                 .data_l = ERR_PMPRO_DATA_LO,
 185                 .data_h = ERR_PMPRO_DATA_HI,
 186                 .warn_l = WARN_PMPRO_INFO_LO,
 187                 .warn_h = WARN_PMPRO_INFO_HI,
 188         },
 189 };
 190
 191 struct smpro_errmon {
 192         struct regmap *regmap;
 193 };
 194
 195 enum EVENT_TYPES {
 196         VRD_WARN_FAULT_EVENT,
 197         VRD_HOT_EVENT,
 198         DIMM_HOT_EVENT,
 199         DIMM_2X_REFRESH_EVENT,
 200         NUM_EVENTS_TYPE,
 201 };
 202
 203 /* Included Address of event source and data registers */
 204 static u8 smpro_event_table[NUM_EVENTS_TYPE] = {
 205         VRD_WARN_FAULT_EVENT_DATA,
 206         VRD_HOT_EVENT_DATA,
 207         DIMM_HOT_EVENT_DATA,
 208         DIMM_2X_REFRESH_EVENT_DATA,
 209 };
 210
 211 static ssize_t smpro_event_data_read(struct device *dev,
 212                                      struct device_attribute *da, char *buf,
 213                                      int channel)
 214 {
 215         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 216         s32 event_data;
 217         int ret;
 218
 219         ret = regmap_read(errmon->regmap, smpro_event_table[channel], &event_data);
 220         if (ret)
 221                 return ret;
 222         /* Clear event after read */
 223         if (event_data != 0)
 224                 regmap_write(errmon->regmap, smpro_event_table[channel], event_data);
 225
 226         return sysfs_emit(buf, "%04x\n", event_data);
 227 }
 228
 229 static ssize_t smpro_overflow_data_read(struct device *dev, struct device_attribute *da,
 230                                         char *buf, int channel)
 231 {
 232         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 233         struct smpro_error_hdr *err_info;
 234         s32 err_count;
 235         int ret;
 236
 237         err_info = &smpro_error_table[channel];
 238
 239         ret = regmap_read(errmon->regmap, err_info->count, &err_count);
 240         if (ret)
 241                 return ret;
 242
 243         /* Bit 8 indicates the overflow status */
 244         return sysfs_emit(buf, "%d\n", (err_count & BIT(8)) ? 1 : 0);
 245 }
 246
 247 static ssize_t smpro_error_data_read(struct device *dev, struct device_attribute *da,
 248                                      char *buf, int channel)
 249 {
 250         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 251         unsigned char err_data[MAX_READ_BLOCK_LENGTH];
 252         struct smpro_error_hdr *err_info;
 253         s32 err_count, err_length;
 254         int ret;
 255
 256         err_info = &smpro_error_table[channel];
 257
 258         ret = regmap_read(errmon->regmap, err_info->count, &err_count);
 259         /* Error count is the low byte */
 260         err_count &= 0xff;
 261         if (ret || !err_count || err_count > err_info->max_cnt)
 262                 return ret;
 263
 264         ret = regmap_read(errmon->regmap, err_info->len, &err_length);
 265         if (ret || err_length <= 0)
 266                 return ret;
 267
 268         if (err_length > MAX_READ_BLOCK_LENGTH)
 269                 err_length = MAX_READ_BLOCK_LENGTH;
 270
 271         memset(err_data, 0x00, MAX_READ_BLOCK_LENGTH);
 272         ret = regmap_noinc_read(errmon->regmap, err_info->data, err_data, err_length);
 273         if (ret < 0)
 274                 return ret;
 275
 276         /* clear the error */
 277         ret = regmap_write(errmon->regmap, err_info->count, 0x100);
 278         if (ret)
 279                 return ret;
 280         /*
 281          * The output of Core/Memory/PCIe/Others UE/CE errors follows the format
 282          * specified in section 5.8.1 CE/UE Error Data record in
 283          * Altra SOC BMC Interface specification.
 284          */
 285         return sysfs_emit(buf, "%*phN\n", MAX_READ_BLOCK_LENGTH, err_data);
 286 }
 287
 288 /*
 289  * Output format:
 290  * <4-byte hex value of error info><4-byte hex value of error extensive data>
 291  * Where:
 292  *   + error info : The error information
 293  *   + error data : Extensive data (32 bits)
 294  * Reference to section 5.10 RAS Internal Error Register Definition in
 295  * Altra SOC BMC Interface specification
 296  */
 297 static ssize_t smpro_internal_err_read(struct device *dev, struct device_attribute *da,
 298                                        char *buf, int channel)
 299 {
 300         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 301         struct smpro_int_error_hdr *err_info;
 302         unsigned int err[4] = { 0 };
 303         unsigned int err_type;
 304         unsigned int val;
 305         int ret;
 306
 307         /* read error status */
 308         ret = regmap_read(errmon->regmap, GPI_RAS_ERR, &val);
 309         if (ret)
 310                 return ret;
 311
 312         if ((channel == RAS_SMPRO_ERR && !(val & BIT(0))) ||
 313             (channel == RAS_PMPRO_ERR && !(val & BIT(1))))
 314                 return 0;
 315
 316         err_info = &list_smpro_int_error_hdr[channel];
 317         ret = regmap_read(errmon->regmap, err_info->type, &val);
 318         if (ret)
 319                 return ret;
 320
 321         err_type = (val & BIT(1)) ? BIT(1) :
 322                    (val & BIT(2)) ? BIT(2) : 0;
 323
 324         if (!err_type)
 325                 return 0;
 326
 327         ret = regmap_read(errmon->regmap, err_info->info_l, err + 1);
 328         if (ret)
 329                 return ret;
 330
 331         ret = regmap_read(errmon->regmap, err_info->info_h, err);
 332         if (ret)
 333                 return ret;
 334
 335         if (err_type & BIT(2)) {
 336                 /* Error with data type */
 337                 ret = regmap_read(errmon->regmap, err_info->data_l, err + 3);
 338                 if (ret)
 339                         return ret;
 340
 341                 ret = regmap_read(errmon->regmap, err_info->data_h, err + 2);
 342                 if (ret)
 343                         return ret;
 344         }
 345
 346         /* clear the read errors */
 347         ret = regmap_write(errmon->regmap, err_info->type, err_type);
 348         if (ret)
 349                 return ret;
 350
 351         return sysfs_emit(buf, "%*phN\n", (int)sizeof(err), err);
 352 }
 353
 354 /*
 355  * Output format:
 356  * <4-byte hex value of warining info>
 357  * Reference to section 5.10 RAS Internal Error Register Definition in
 358  * Altra SOC BMC Interface specification
 359  */
 360 static ssize_t smpro_internal_warn_read(struct device *dev, struct device_attribute *da,
 361                                         char *buf, int channel)
 362 {
 363         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 364         struct smpro_int_error_hdr *err_info;
 365         unsigned int warn[2] = { 0 };
 366         unsigned int val;
 367         int ret;
 368
 369         /* read error status */
 370         ret = regmap_read(errmon->regmap, GPI_RAS_ERR, &val);
 371         if (ret)
 372                 return ret;
 373
 374         if ((channel == RAS_SMPRO_ERR && !(val & BIT(0))) ||
 375             (channel == RAS_PMPRO_ERR && !(val & BIT(1))))
 376                 return 0;
 377
 378         err_info = &list_smpro_int_error_hdr[channel];
 379         ret = regmap_read(errmon->regmap, err_info->type, &val);
 380         if (ret)
 381                 return ret;
 382
 383         if (!(val & BIT(0)))
 384                 return 0;
 385
 386         ret = regmap_read(errmon->regmap, err_info->warn_l, warn + 1);
 387         if (ret)
 388                 return ret;
 389
 390         ret = regmap_read(errmon->regmap, err_info->warn_h, warn);
 391         if (ret)
 392                 return ret;
 393
 394         /* clear the warning */
 395         ret = regmap_write(errmon->regmap, err_info->type, BIT(0));
 396         if (ret)
 397                 return ret;
 398
 399         return sysfs_emit(buf, "%*phN\n", (int)sizeof(warn), warn);
 400 }
 401
 402 #define ERROR_OVERFLOW_RO(_error, _index) \
 403         static ssize_t overflow_##_error##_show(struct device *dev,            \
 404                                                 struct device_attribute *da,   \
 405                                                 char *buf)                     \
 406         {                                                                      \
 407                 return smpro_overflow_data_read(dev, da, buf, _index);         \
 408         }                                                                      \
 409         static DEVICE_ATTR_RO(overflow_##_error)
 410
 411 ERROR_OVERFLOW_RO(core_ce, CORE_CE_ERR);
 412 ERROR_OVERFLOW_RO(core_ue, CORE_UE_ERR);
 413 ERROR_OVERFLOW_RO(mem_ce, MEM_CE_ERR);
 414 ERROR_OVERFLOW_RO(mem_ue, MEM_UE_ERR);
 415 ERROR_OVERFLOW_RO(pcie_ce, PCIE_CE_ERR);
 416 ERROR_OVERFLOW_RO(pcie_ue, PCIE_UE_ERR);
 417 ERROR_OVERFLOW_RO(other_ce, OTHER_CE_ERR);
 418 ERROR_OVERFLOW_RO(other_ue, OTHER_UE_ERR);
 419
 420 #define ERROR_RO(_error, _index) \
 421         static ssize_t error_##_error##_show(struct device *dev,            \
 422                                              struct device_attribute *da,   \
 423                                              char *buf)                     \
 424         {                                                                   \
 425                 return smpro_error_data_read(dev, da, buf, _index);         \
 426         }                                                                   \
 427         static DEVICE_ATTR_RO(error_##_error)
 428
 429 ERROR_RO(core_ce, CORE_CE_ERR);
 430 ERROR_RO(core_ue, CORE_UE_ERR);
 431 ERROR_RO(mem_ce, MEM_CE_ERR);
 432 ERROR_RO(mem_ue, MEM_UE_ERR);
 433 ERROR_RO(pcie_ce, PCIE_CE_ERR);
 434 ERROR_RO(pcie_ue, PCIE_UE_ERR);
 435 ERROR_RO(other_ce, OTHER_CE_ERR);
 436 ERROR_RO(other_ue, OTHER_UE_ERR);
 437
 438 static ssize_t error_smpro_show(struct device *dev, struct device_attribute *da, char *buf)
 439 {
 440         return smpro_internal_err_read(dev, da, buf, RAS_SMPRO_ERR);
 441 }
 442 static DEVICE_ATTR_RO(error_smpro);
 443
 444 static ssize_t error_pmpro_show(struct device *dev, struct device_attribute *da, char *buf)
 445 {
 446         return smpro_internal_err_read(dev, da, buf, RAS_PMPRO_ERR);
 447 }
 448 static DEVICE_ATTR_RO(error_pmpro);
 449
 450 static ssize_t warn_smpro_show(struct device *dev, struct device_attribute *da, char *buf)
 451 {
 452         return smpro_internal_warn_read(dev, da, buf, RAS_SMPRO_ERR);
 453 }
 454 static DEVICE_ATTR_RO(warn_smpro);
 455
 456 static ssize_t warn_pmpro_show(struct device *dev, struct device_attribute *da, char *buf)
 457 {
 458         return smpro_internal_warn_read(dev, da, buf, RAS_PMPRO_ERR);
 459 }
 460 static DEVICE_ATTR_RO(warn_pmpro);
 461
 462 #define EVENT_RO(_event, _index) \
 463         static ssize_t event_##_event##_show(struct device *dev,            \
 464                                              struct device_attribute *da,   \
 465                                              char *buf)                     \
 466         {                                                                   \
 467                 return smpro_event_data_read(dev, da, buf, _index);         \
 468         }                                                                   \
 469         static DEVICE_ATTR_RO(event_##_event)
 470
 471 EVENT_RO(vrd_warn_fault, VRD_WARN_FAULT_EVENT);
 472 EVENT_RO(vrd_hot, VRD_HOT_EVENT);
 473 EVENT_RO(dimm_hot, DIMM_HOT_EVENT);
 474 EVENT_RO(dimm_2x_refresh, DIMM_2X_REFRESH_EVENT);
 475
 476 static ssize_t smpro_dimm_syndrome_read(struct device *dev, struct device_attribute *da,
 477                                         char *buf, unsigned int slot)
 478 {
 479         struct smpro_errmon *errmon = dev_get_drvdata(dev);
 480         unsigned int data;
 481         int ret;
 482
 483         ret = regmap_read(errmon->regmap, BOOTSTAGE, &data);
 484         if (ret)
 485                 return ret;
 486
 487         /* check for valid stage */
 488         data = (data >> 8) & 0xff;
 489         if (data != DIMM_SYNDROME_STAGE)
 490                 return ret;
 491
 492         /* Write the slot ID to retrieve Error Syndrome */
 493         ret = regmap_write(errmon->regmap, DIMM_SYNDROME_SEL, slot);
 494         if (ret)
 495                 return ret;
 496
 497         /* Read the Syndrome error */
 498         ret = regmap_read(errmon->regmap, DIMM_SYNDROME_ERR, &data);
 499         if (ret || !data)
 500                 return ret;
 501
 502         return sysfs_emit(buf, "%04x\n", data);
 503 }
 504
 505 #define EVENT_DIMM_SYNDROME(_slot) \
 506         static ssize_t event_dimm##_slot##_syndrome_show(struct device *dev,          \
 507                                                          struct device_attribute *da, \
 508                                                          char *buf)                   \
 509         {                                                                             \
 510                 return smpro_dimm_syndrome_read(dev, da, buf, _slot);                 \
 511         }                                                                             \
 512         static DEVICE_ATTR_RO(event_dimm##_slot##_syndrome)
 513
 514 EVENT_DIMM_SYNDROME(0);
 515 EVENT_DIMM_SYNDROME(1);
 516 EVENT_DIMM_SYNDROME(2);
 517 EVENT_DIMM_SYNDROME(3);
 518 EVENT_DIMM_SYNDROME(4);
 519 EVENT_DIMM_SYNDROME(5);
 520 EVENT_DIMM_SYNDROME(6);
 521 EVENT_DIMM_SYNDROME(7);
 522 EVENT_DIMM_SYNDROME(8);
 523 EVENT_DIMM_SYNDROME(9);
 524 EVENT_DIMM_SYNDROME(10);
 525 EVENT_DIMM_SYNDROME(11);
 526 EVENT_DIMM_SYNDROME(12);
 527 EVENT_DIMM_SYNDROME(13);
 528 EVENT_DIMM_SYNDROME(14);
 529 EVENT_DIMM_SYNDROME(15);
 530
 531 static struct attribute *smpro_errmon_attrs[] = {
 532         &dev_attr_overflow_core_ce.attr,
 533         &dev_attr_overflow_core_ue.attr,
 534         &dev_attr_overflow_mem_ce.attr,
 535         &dev_attr_overflow_mem_ue.attr,
 536         &dev_attr_overflow_pcie_ce.attr,
 537         &dev_attr_overflow_pcie_ue.attr,
 538         &dev_attr_overflow_other_ce.attr,
 539         &dev_attr_overflow_other_ue.attr,
 540         &dev_attr_error_core_ce.attr,
 541         &dev_attr_error_core_ue.attr,
 542         &dev_attr_error_mem_ce.attr,
 543         &dev_attr_error_mem_ue.attr,
 544         &dev_attr_error_pcie_ce.attr,
 545         &dev_attr_error_pcie_ue.attr,
 546         &dev_attr_error_other_ce.attr,
 547         &dev_attr_error_other_ue.attr,
 548         &dev_attr_error_smpro.attr,
 549         &dev_attr_error_pmpro.attr,
 550         &dev_attr_warn_smpro.attr,
 551         &dev_attr_warn_pmpro.attr,
 552         &dev_attr_event_vrd_warn_fault.attr,
 553         &dev_attr_event_vrd_hot.attr,
 554         &dev_attr_event_dimm_hot.attr,
 555         &dev_attr_event_dimm_2x_refresh.attr,
 556         &dev_attr_event_dimm0_syndrome.attr,
 557         &dev_attr_event_dimm1_syndrome.attr,
 558         &dev_attr_event_dimm2_syndrome.attr,
 559         &dev_attr_event_dimm3_syndrome.attr,
 560         &dev_attr_event_dimm4_syndrome.attr,
 561         &dev_attr_event_dimm5_syndrome.attr,
 562         &dev_attr_event_dimm6_syndrome.attr,
 563         &dev_attr_event_dimm7_syndrome.attr,
 564         &dev_attr_event_dimm8_syndrome.attr,
 565         &dev_attr_event_dimm9_syndrome.attr,
 566         &dev_attr_event_dimm10_syndrome.attr,
 567         &dev_attr_event_dimm11_syndrome.attr,
 568         &dev_attr_event_dimm12_syndrome.attr,
 569         &dev_attr_event_dimm13_syndrome.attr,
 570         &dev_attr_event_dimm14_syndrome.attr,
 571         &dev_attr_event_dimm15_syndrome.attr,
 572         NULL
 573 };
 574
 575 ATTRIBUTE_GROUPS(smpro_errmon);
 576
 577 static int smpro_errmon_probe(struct platform_device *pdev)
 578 {
 579         struct smpro_errmon *errmon;
 580
 581         errmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_errmon), GFP_KERNEL);
 582         if (!errmon)
 583                 return -ENOMEM;
 584
 585         platform_set_drvdata(pdev, errmon);
 586
 587         errmon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 588         if (!errmon->regmap)
 589                 return -ENODEV;
 590
 591         return 0;
 592 }
 593
 594 static struct platform_driver smpro_errmon_driver = {
 595         .probe          = smpro_errmon_probe,
 596         .driver = {
 597                 .name   = "smpro-errmon",
 598                 .dev_groups = smpro_errmon_groups,
 599         },
 600 };
 601
 602 module_platform_driver(smpro_errmon_driver);
 603
 604 MODULE_AUTHOR("Tung Nguyen <tung.nguyen@amperecomputing.com>");
 605 MODULE_AUTHOR("Thinh Pham <thinh.pham@amperecomputing.com>");
 606 MODULE_AUTHOR("Hoang Nguyen <hnguyen@amperecomputing.com>");
 607 MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>");
 608 MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>");
 609 MODULE_DESCRIPTION("Ampere Altra SMpro driver");
 610 MODULE_LICENSE("GPL");