drivers/hwmon/pmbus/ibm-cffps.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2017 IBM Corp.
   4  */
   5
   6 #include <linux/bitfield.h>
   7 #include <linux/bitops.h>
   8 #include <linux/debugfs.h>
   9 #include <linux/device.h>
  10 #include <linux/fs.h>
  11 #include <linux/i2c.h>
  12 #include <linux/jiffies.h>
  13 #include <linux/leds.h>
  14 #include <linux/module.h>
  15 #include <linux/mutex.h>
  16 #include <linux/of_device.h>
  17 #include <linux/pmbus.h>
  18
  19 #include "pmbus.h"
  20
  21 #define CFFPS_MFG_ID_CMD                        0x99
  22 #define CFFPS_FRU_CMD                           0x9A
  23 #define CFFPS_PN_CMD                            0x9B
  24 #define CFFPS_HEADER_CMD                        0x9C
  25 #define CFFPS_SN_CMD                            0x9E
  26 #define CFFPS_MAX_POWER_OUT_CMD                 0xA7
  27 #define CFFPS_CCIN_CMD                          0xBD
  28 #define CFFPS_FW_CMD                            0xFA
  29 #define CFFPS1_FW_NUM_BYTES                     4
  30 #define CFFPS2_FW_NUM_WORDS                     3
  31 #define CFFPS_SYS_CONFIG_CMD                    0xDA
  32 #define CFFPS_12VCS_VOUT_CMD                    0xDE
  33
  34 #define CFFPS_INPUT_HISTORY_CMD                 0xD6
  35 #define CFFPS_INPUT_HISTORY_SIZE                100
  36
  37 #define CFFPS_CCIN_REVISION                     GENMASK(7, 0)
  38 #define CFFPS_CCIN_REVISION_LEGACY               0xde
  39 #define CFFPS_CCIN_VERSION                      GENMASK(15, 8)
  40 #define CFFPS_CCIN_VERSION_1                     0x2b
  41 #define CFFPS_CCIN_VERSION_2                     0x2e
  42 #define CFFPS_CCIN_VERSION_3                     0x51
  43
  44 /* STATUS_MFR_SPECIFIC bits */
  45 #define CFFPS_MFR_FAN_FAULT                     BIT(0)
  46 #define CFFPS_MFR_THERMAL_FAULT                 BIT(1)
  47 #define CFFPS_MFR_OV_FAULT                      BIT(2)
  48 #define CFFPS_MFR_UV_FAULT                      BIT(3)
  49 #define CFFPS_MFR_PS_KILL                       BIT(4)
  50 #define CFFPS_MFR_OC_FAULT                      BIT(5)
  51 #define CFFPS_MFR_VAUX_FAULT                    BIT(6)
  52 #define CFFPS_MFR_CURRENT_SHARE_WARNING         BIT(7)
  53
  54 #define CFFPS_LED_BLINK                         (BIT(0) | BIT(6))
  55 #define CFFPS_LED_ON                            (BIT(1) | BIT(6))
  56 #define CFFPS_LED_OFF                           (BIT(2) | BIT(6))
  57 #define CFFPS_BLINK_RATE_MS                     250
  58
  59 enum {
  60         CFFPS_DEBUGFS_INPUT_HISTORY = 0,
  61         CFFPS_DEBUGFS_MFG_ID,
  62         CFFPS_DEBUGFS_FRU,
  63         CFFPS_DEBUGFS_PN,
  64         CFFPS_DEBUGFS_HEADER,
  65         CFFPS_DEBUGFS_SN,
  66         CFFPS_DEBUGFS_MAX_POWER_OUT,
  67         CFFPS_DEBUGFS_CCIN,
  68         CFFPS_DEBUGFS_FW,
  69         CFFPS_DEBUGFS_ON_OFF_CONFIG,
  70         CFFPS_DEBUGFS_NUM_ENTRIES
  71 };
  72
  73 enum versions { cffps1, cffps2, cffps_unknown };
  74
  75 struct ibm_cffps_input_history {
  76         struct mutex update_lock;
  77         unsigned long last_update;
  78
  79         u8 byte_count;
  80         u8 data[CFFPS_INPUT_HISTORY_SIZE];
  81 };
  82
  83 struct ibm_cffps {
  84         enum versions version;
  85         struct i2c_client *client;
  86
  87         struct ibm_cffps_input_history input_history;
  88
  89         int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
  90
  91         char led_name[32];
  92         u8 led_state;
  93         struct led_classdev led;
  94 };
  95
  96 static const struct i2c_device_id ibm_cffps_id[];
  97
  98 #define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
  99
 100 static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
 101                                             char __user *buf, size_t count,
 102                                             loff_t *ppos)
 103 {
 104         int rc;
 105         u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
 106         u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
 107         struct i2c_msg msg[2] = {
 108                 {
 109                         .addr = psu->client->addr,
 110                         .flags = psu->client->flags,
 111                         .len = 1,
 112                         .buf = msgbuf0,
 113                 }, {
 114                         .addr = psu->client->addr,
 115                         .flags = psu->client->flags | I2C_M_RD,
 116                         .len = CFFPS_INPUT_HISTORY_SIZE + 1,
 117                         .buf = msgbuf1,
 118                 },
 119         };
 120
 121         if (!*ppos) {
 122                 mutex_lock(&psu->input_history.update_lock);
 123                 if (time_after(jiffies, psu->input_history.last_update + HZ)) {
 124                         /*
 125                          * Use a raw i2c transfer, since we need more bytes
 126                          * than Linux I2C supports through smbus xfr (only 32).
 127                          */
 128                         rc = i2c_transfer(psu->client->adapter, msg, 2);
 129                         if (rc < 0) {
 130                                 mutex_unlock(&psu->input_history.update_lock);
 131                                 return rc;
 132                         }
 133
 134                         psu->input_history.byte_count = msgbuf1[0];
 135                         memcpy(psu->input_history.data, &msgbuf1[1],
 136                                CFFPS_INPUT_HISTORY_SIZE);
 137                         psu->input_history.last_update = jiffies;
 138                 }
 139
 140                 mutex_unlock(&psu->input_history.update_lock);
 141         }
 142
 143         return simple_read_from_buffer(buf, count, ppos,
 144                                        psu->input_history.data,
 145                                        psu->input_history.byte_count);
 146 }
 147
 148 static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
 149                                       size_t count, loff_t *ppos)
 150 {
 151         u8 cmd;
 152         int i, rc;
 153         int *idxp = file->private_data;
 154         int idx = *idxp;
 155         struct ibm_cffps *psu = to_psu(idxp, idx);
 156         char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
 157
 158         pmbus_set_page(psu->client, 0, 0xff);
 159
 160         switch (idx) {
 161         case CFFPS_DEBUGFS_INPUT_HISTORY:
 162                 return ibm_cffps_read_input_history(psu, buf, count, ppos);
 163         case CFFPS_DEBUGFS_MFG_ID:
 164                 cmd = CFFPS_MFG_ID_CMD;
 165                 break;
 166         case CFFPS_DEBUGFS_FRU:
 167                 cmd = CFFPS_FRU_CMD;
 168                 break;
 169         case CFFPS_DEBUGFS_PN:
 170                 cmd = CFFPS_PN_CMD;
 171                 break;
 172         case CFFPS_DEBUGFS_HEADER:
 173                 cmd = CFFPS_HEADER_CMD;
 174                 break;
 175         case CFFPS_DEBUGFS_SN:
 176                 cmd = CFFPS_SN_CMD;
 177                 break;
 178         case CFFPS_DEBUGFS_MAX_POWER_OUT:
 179                 if (psu->version == cffps1) {
 180                         rc = i2c_smbus_read_word_swapped(psu->client,
 181                                         CFFPS_MAX_POWER_OUT_CMD);
 182                 } else {
 183                         rc = i2c_smbus_read_word_data(psu->client,
 184                                         CFFPS_MAX_POWER_OUT_CMD);
 185                 }
 186
 187                 if (rc < 0)
 188                         return rc;
 189
 190                 rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
 191                 goto done;
 192         case CFFPS_DEBUGFS_CCIN:
 193                 rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
 194                 if (rc < 0)
 195                         return rc;
 196
 197                 rc = snprintf(data, 5, "%04X", rc);
 198                 goto done;
 199         case CFFPS_DEBUGFS_FW:
 200                 switch (psu->version) {
 201                 case cffps1:
 202                         for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
 203                                 rc = i2c_smbus_read_byte_data(psu->client,
 204                                                               CFFPS_FW_CMD +
 205                                                                 i);
 206                                 if (rc < 0)
 207                                         return rc;
 208
 209                                 snprintf(&data[i * 2], 3, "%02X", rc);
 210                         }
 211
 212                         rc = i * 2;
 213                         break;
 214                 case cffps2:
 215                         for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
 216                                 rc = i2c_smbus_read_word_data(psu->client,
 217                                                               CFFPS_FW_CMD +
 218                                                                 i);
 219                                 if (rc < 0)
 220                                         return rc;
 221
 222                                 snprintf(&data[i * 4], 5, "%04X", rc);
 223                         }
 224
 225                         rc = i * 4;
 226                         break;
 227                 default:
 228                         return -EOPNOTSUPP;
 229                 }
 230                 goto done;
 231         case CFFPS_DEBUGFS_ON_OFF_CONFIG:
 232                 rc = i2c_smbus_read_byte_data(psu->client,
 233                                               PMBUS_ON_OFF_CONFIG);
 234                 if (rc < 0)
 235                         return rc;
 236
 237                 rc = snprintf(data, 3, "%02x", rc);
 238                 goto done;
 239         default:
 240                 return -EINVAL;
 241         }
 242
 243         rc = i2c_smbus_read_block_data(psu->client, cmd, data);
 244         if (rc < 0)
 245                 return rc;
 246
 247 done:
 248         data[rc] = '\n';
 249         rc += 2;
 250
 251         return simple_read_from_buffer(buf, count, ppos, data, rc);
 252 }
 253
 254 static ssize_t ibm_cffps_debugfs_write(struct file *file,
 255                                        const char __user *buf, size_t count,
 256                                        loff_t *ppos)
 257 {
 258         u8 data;
 259         ssize_t rc;
 260         int *idxp = file->private_data;
 261         int idx = *idxp;
 262         struct ibm_cffps *psu = to_psu(idxp, idx);
 263
 264         switch (idx) {
 265         case CFFPS_DEBUGFS_ON_OFF_CONFIG:
 266                 pmbus_set_page(psu->client, 0, 0xff);
 267
 268                 rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
 269                 if (rc <= 0)
 270                         return rc;
 271
 272                 rc = i2c_smbus_write_byte_data(psu->client,
 273                                                PMBUS_ON_OFF_CONFIG, data);
 274                 if (rc)
 275                         return rc;
 276
 277                 rc = 1;
 278                 break;
 279         default:
 280                 return -EINVAL;
 281         }
 282
 283         return rc;
 284 }
 285
 286 static const struct file_operations ibm_cffps_fops = {
 287         .llseek = noop_llseek,
 288         .read = ibm_cffps_debugfs_read,
 289         .write = ibm_cffps_debugfs_write,
 290         .open = simple_open,
 291 };
 292
 293 static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
 294                                     int reg)
 295 {
 296         int rc, mfr;
 297
 298         switch (reg) {
 299         case PMBUS_STATUS_VOUT:
 300         case PMBUS_STATUS_IOUT:
 301         case PMBUS_STATUS_TEMPERATURE:
 302         case PMBUS_STATUS_FAN_12:
 303                 rc = pmbus_read_byte_data(client, page, reg);
 304                 if (rc < 0)
 305                         return rc;
 306
 307                 mfr = pmbus_read_byte_data(client, page,
 308                                            PMBUS_STATUS_MFR_SPECIFIC);
 309                 if (mfr < 0)
 310                         /*
 311                          * Return the status register instead of an error,
 312                          * since we successfully read status.
 313                          */
 314                         return rc;
 315
 316                 /* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
 317                 if (reg == PMBUS_STATUS_FAN_12) {
 318                         if (mfr & CFFPS_MFR_FAN_FAULT)
 319                                 rc |= PB_FAN_FAN1_FAULT;
 320                 } else if (reg == PMBUS_STATUS_TEMPERATURE) {
 321                         if (mfr & CFFPS_MFR_THERMAL_FAULT)
 322                                 rc |= PB_TEMP_OT_FAULT;
 323                 } else if (reg == PMBUS_STATUS_VOUT) {
 324                         if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
 325                                 rc |= PB_VOLTAGE_OV_FAULT;
 326                         if (mfr & CFFPS_MFR_UV_FAULT)
 327                                 rc |= PB_VOLTAGE_UV_FAULT;
 328                 } else if (reg == PMBUS_STATUS_IOUT) {
 329                         if (mfr & CFFPS_MFR_OC_FAULT)
 330                                 rc |= PB_IOUT_OC_FAULT;
 331                         if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
 332                                 rc |= PB_CURRENT_SHARE_FAULT;
 333                 }
 334                 break;
 335         default:
 336                 rc = -ENODATA;
 337                 break;
 338         }
 339
 340         return rc;
 341 }
 342
 343 static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
 344                                     int phase, int reg)
 345 {
 346         int rc, mfr;
 347
 348         switch (reg) {
 349         case PMBUS_STATUS_WORD:
 350                 rc = pmbus_read_word_data(client, page, phase, reg);
 351                 if (rc < 0)
 352                         return rc;
 353
 354                 mfr = pmbus_read_byte_data(client, page,
 355                                            PMBUS_STATUS_MFR_SPECIFIC);
 356                 if (mfr < 0)
 357                         /*
 358                          * Return the status register instead of an error,
 359                          * since we successfully read status.
 360                          */
 361                         return rc;
 362
 363                 if (mfr & CFFPS_MFR_PS_KILL)
 364                         rc |= PB_STATUS_OFF;
 365                 break;
 366         case PMBUS_VIRT_READ_VMON:
 367                 rc = pmbus_read_word_data(client, page, phase,
 368                                           CFFPS_12VCS_VOUT_CMD);
 369                 break;
 370         default:
 371                 rc = -ENODATA;
 372                 break;
 373         }
 374
 375         return rc;
 376 }
 377
 378 static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
 379                                         enum led_brightness brightness)
 380 {
 381         int rc;
 382         u8 next_led_state;
 383         struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
 384
 385         if (brightness == LED_OFF) {
 386                 next_led_state = CFFPS_LED_OFF;
 387         } else {
 388                 brightness = LED_FULL;
 389
 390                 if (psu->led_state != CFFPS_LED_BLINK)
 391                         next_led_state = CFFPS_LED_ON;
 392                 else
 393                         next_led_state = CFFPS_LED_BLINK;
 394         }
 395
 396         dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
 397                 brightness, next_led_state);
 398
 399         pmbus_set_page(psu->client, 0, 0xff);
 400
 401         rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
 402                                        next_led_state);
 403         if (rc < 0)
 404                 return rc;
 405
 406         psu->led_state = next_led_state;
 407         led_cdev->brightness = brightness;
 408
 409         return 0;
 410 }
 411
 412 static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
 413                                    unsigned long *delay_on,
 414                                    unsigned long *delay_off)
 415 {
 416         int rc;
 417         struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
 418
 419         dev_dbg(&psu->client->dev, "LED blink set.\n");
 420
 421         pmbus_set_page(psu->client, 0, 0xff);
 422
 423         rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
 424                                        CFFPS_LED_BLINK);
 425         if (rc < 0)
 426                 return rc;
 427
 428         psu->led_state = CFFPS_LED_BLINK;
 429         led_cdev->brightness = LED_FULL;
 430         *delay_on = CFFPS_BLINK_RATE_MS;
 431         *delay_off = CFFPS_BLINK_RATE_MS;
 432
 433         return 0;
 434 }
 435
 436 static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
 437 {
 438         int rc;
 439         struct i2c_client *client = psu->client;
 440         struct device *dev = &client->dev;
 441
 442         snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
 443                  client->addr);
 444         psu->led.name = psu->led_name;
 445         psu->led.max_brightness = LED_FULL;
 446         psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
 447         psu->led.blink_set = ibm_cffps_led_blink_set;
 448
 449         rc = devm_led_classdev_register(dev, &psu->led);
 450         if (rc)
 451                 dev_warn(dev, "failed to register led class: %d\n", rc);
 452         else
 453                 i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
 454                                           CFFPS_LED_OFF);
 455 }
 456
 457 static struct pmbus_driver_info ibm_cffps_info[] = {
 458         [cffps1] = {
 459                 .pages = 1,
 460                 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
 461                         PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
 462                         PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
 463                         PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
 464                         PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
 465                         PMBUS_HAVE_STATUS_FAN12,
 466                 .read_byte_data = ibm_cffps_read_byte_data,
 467                 .read_word_data = ibm_cffps_read_word_data,
 468         },
 469         [cffps2] = {
 470                 .pages = 2,
 471                 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
 472                         PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
 473                         PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
 474                         PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
 475                         PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
 476                         PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON,
 477                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
 478                         PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
 479                         PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
 480                 .read_byte_data = ibm_cffps_read_byte_data,
 481                 .read_word_data = ibm_cffps_read_word_data,
 482         },
 483 };
 484
 485 static struct pmbus_platform_data ibm_cffps_pdata = {
 486         .flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY,
 487 };
 488
 489 static int ibm_cffps_probe(struct i2c_client *client)
 490 {
 491         int i, rc;
 492         enum versions vs = cffps_unknown;
 493         struct dentry *debugfs;
 494         struct dentry *ibm_cffps_dir;
 495         struct ibm_cffps *psu;
 496         const void *md = of_device_get_match_data(&client->dev);
 497         const struct i2c_device_id *id;
 498
 499         if (md) {
 500                 vs = (enum versions)md;
 501         } else {
 502                 id = i2c_match_id(ibm_cffps_id, client);
 503                 if (id)
 504                         vs = (enum versions)id->driver_data;
 505         }
 506
 507         if (vs == cffps_unknown) {
 508                 u16 ccin_revision = 0;
 509                 u16 ccin_version = CFFPS_CCIN_VERSION_1;
 510                 int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
 511                 char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
 512
 513                 if (ccin > 0) {
 514                         ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
 515                         ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
 516                 }
 517
 518                 rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id);
 519                 if (rc < 0) {
 520                         dev_err(&client->dev, "Failed to read Manufacturer ID\n");
 521                         return rc;
 522                 }
 523
 524                 switch (ccin_version) {
 525                 default:
 526                 case CFFPS_CCIN_VERSION_1:
 527                         if ((strncmp(mfg_id, "ACBE", 4) == 0) ||
 528                                      (strncmp(mfg_id, "ARTE", 4) == 0))
 529                                 vs = cffps1;
 530                         else
 531                                 vs = cffps2;
 532                         break;
 533                 case CFFPS_CCIN_VERSION_2:
 534                         vs = cffps2;
 535                         break;
 536                 case CFFPS_CCIN_VERSION_3:
 537                         if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
 538                                 vs = cffps1;
 539                         else
 540                                 vs = cffps2;
 541                         break;
 542                 }
 543
 544                 /* Set the client name to include the version number. */
 545                 snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
 546         }
 547
 548         client->dev.platform_data = &ibm_cffps_pdata;
 549         rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
 550         if (rc)
 551                 return rc;
 552
 553         /*
 554          * Don't fail the probe if there isn't enough memory for leds and
 555          * debugfs.
 556          */
 557         psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
 558         if (!psu)
 559                 return 0;
 560
 561         psu->version = vs;
 562         psu->client = client;
 563         mutex_init(&psu->input_history.update_lock);
 564         psu->input_history.last_update = jiffies - HZ;
 565
 566         ibm_cffps_create_led_class(psu);
 567
 568         /* Don't fail the probe if we can't create debugfs */
 569         debugfs = pmbus_get_debugfs_dir(client);
 570         if (!debugfs)
 571                 return 0;
 572
 573         ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
 574         if (!ibm_cffps_dir)
 575                 return 0;
 576
 577         for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
 578                 psu->debugfs_entries[i] = i;
 579
 580         debugfs_create_file("input_history", 0444, ibm_cffps_dir,
 581                             &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
 582                             &ibm_cffps_fops);
 583         debugfs_create_file("mfg_id", 0444, ibm_cffps_dir,
 584                             &psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID],
 585                             &ibm_cffps_fops);
 586         debugfs_create_file("fru", 0444, ibm_cffps_dir,
 587                             &psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
 588                             &ibm_cffps_fops);
 589         debugfs_create_file("part_number", 0444, ibm_cffps_dir,
 590                             &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
 591                             &ibm_cffps_fops);
 592         debugfs_create_file("header", 0444, ibm_cffps_dir,
 593                             &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
 594                             &ibm_cffps_fops);
 595         debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
 596                             &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
 597                             &ibm_cffps_fops);
 598         debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
 599                             &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
 600                             &ibm_cffps_fops);
 601         debugfs_create_file("ccin", 0444, ibm_cffps_dir,
 602                             &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
 603                             &ibm_cffps_fops);
 604         debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
 605                             &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
 606                             &ibm_cffps_fops);
 607         debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
 608                             &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
 609                             &ibm_cffps_fops);
 610
 611         return 0;
 612 }
 613
 614 static const struct i2c_device_id ibm_cffps_id[] = {
 615         { "ibm_cffps1", cffps1 },
 616         { "ibm_cffps2", cffps2 },
 617         { "ibm_cffps", cffps_unknown },
 618         {}
 619 };
 620 MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
 621
 622 static const struct of_device_id ibm_cffps_of_match[] = {
 623         {
 624                 .compatible = "ibm,cffps1",
 625                 .data = (void *)cffps1
 626         },
 627         {
 628                 .compatible = "ibm,cffps2",
 629                 .data = (void *)cffps2
 630         },
 631         {
 632                 .compatible = "ibm,cffps",
 633                 .data = (void *)cffps_unknown
 634         },
 635         {}
 636 };
 637 MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
 638
 639 static struct i2c_driver ibm_cffps_driver = {
 640         .driver = {
 641                 .name = "ibm-cffps",
 642                 .of_match_table = ibm_cffps_of_match,
 643         },
 644         .probe_new = ibm_cffps_probe,
 645         .id_table = ibm_cffps_id,
 646 };
 647
 648 module_i2c_driver(ibm_cffps_driver);
 649
 650 MODULE_AUTHOR("Eddie James");
 651 MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
 652 MODULE_LICENSE("GPL");
 653 MODULE_IMPORT_NS(PMBUS);