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