drivers/hwmon/pmbus/ucd9000.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Hardware monitoring driver for UCD90xxx Sequencer and System Health
   4  * Controller series
   5  *
   6  * Copyright (C) 2011 Ericsson AB.
   7  */
   8
   9 #include <linux/debugfs.h>
  10 #include <linux/delay.h>
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/init.h>
  15 #include <linux/err.h>
  16 #include <linux/slab.h>
  17 #include <linux/i2c.h>
  18 #include <linux/pmbus.h>
  19 #include <linux/gpio/driver.h>
  20 #include <linux/timekeeping.h>
  21 #include "pmbus.h"
  22
  23 enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd90320, ucd9090,
  24              ucd90910 };
  25
  26 #define UCD9000_MONITOR_CONFIG          0xd5
  27 #define UCD9000_NUM_PAGES               0xd6
  28 #define UCD9000_FAN_CONFIG_INDEX        0xe7
  29 #define UCD9000_FAN_CONFIG              0xe8
  30 #define UCD9000_MFR_STATUS              0xf3
  31 #define UCD9000_GPIO_SELECT             0xfa
  32 #define UCD9000_GPIO_CONFIG             0xfb
  33 #define UCD9000_DEVICE_ID               0xfd
  34
  35 /* GPIO CONFIG bits */
  36 #define UCD9000_GPIO_CONFIG_ENABLE      BIT(0)
  37 #define UCD9000_GPIO_CONFIG_OUT_ENABLE  BIT(1)
  38 #define UCD9000_GPIO_CONFIG_OUT_VALUE   BIT(2)
  39 #define UCD9000_GPIO_CONFIG_STATUS      BIT(3)
  40 #define UCD9000_GPIO_INPUT              0
  41 #define UCD9000_GPIO_OUTPUT             1
  42
  43 #define UCD9000_MON_TYPE(x)     (((x) >> 5) & 0x07)
  44 #define UCD9000_MON_PAGE(x)     ((x) & 0x1f)
  45
  46 #define UCD9000_MON_VOLTAGE     1
  47 #define UCD9000_MON_TEMPERATURE 2
  48 #define UCD9000_MON_CURRENT     3
  49 #define UCD9000_MON_VOLTAGE_HW  4
  50
  51 #define UCD9000_NUM_FAN         4
  52
  53 #define UCD9000_GPIO_NAME_LEN   16
  54 #define UCD9090_NUM_GPIOS       23
  55 #define UCD901XX_NUM_GPIOS      26
  56 #define UCD90320_NUM_GPIOS      84
  57 #define UCD90910_NUM_GPIOS      26
  58
  59 #define UCD9000_DEBUGFS_NAME_LEN        24
  60 #define UCD9000_GPI_COUNT               8
  61 #define UCD90320_GPI_COUNT              32
  62
  63 struct ucd9000_data {
  64         u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX];
  65         struct pmbus_driver_info info;
  66 #ifdef CONFIG_GPIOLIB
  67         struct gpio_chip gpio;
  68 #endif
  69         struct dentry *debugfs;
  70         ktime_t write_time;
  71 };
  72 #define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info)
  73
  74 struct ucd9000_debugfs_entry {
  75         struct i2c_client *client;
  76         u8 index;
  77 };
  78
  79 /*
  80  * It has been observed that the UCD90320 randomly fails register access when
  81  * doing another access right on the back of a register write. To mitigate this
  82  * make sure that there is a minimum delay between a write access and the
  83  * following access. The 500 is based on experimental data. At a delay of
  84  * 350us the issue seems to go away. Add a bit of extra margin to allow for
  85  * system to system differences.
  86  */
  87 #define UCD90320_WAIT_DELAY_US 500
  88
  89 static inline void ucd90320_wait(const struct ucd9000_data *data)
  90 {
  91         s64 delta = ktime_us_delta(ktime_get(), data->write_time);
  92
  93         if (delta < UCD90320_WAIT_DELAY_US)
  94                 udelay(UCD90320_WAIT_DELAY_US - delta);
  95 }
  96
  97 static int ucd90320_read_word_data(struct i2c_client *client, int page,
  98                                    int phase, int reg)
  99 {
 100         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 101         struct ucd9000_data *data = to_ucd9000_data(info);
 102
 103         if (reg >= PMBUS_VIRT_BASE)
 104                 return -ENXIO;
 105
 106         ucd90320_wait(data);
 107         return pmbus_read_word_data(client, page, phase, reg);
 108 }
 109
 110 static int ucd90320_read_byte_data(struct i2c_client *client, int page, int reg)
 111 {
 112         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 113         struct ucd9000_data *data = to_ucd9000_data(info);
 114
 115         ucd90320_wait(data);
 116         return pmbus_read_byte_data(client, page, reg);
 117 }
 118
 119 static int ucd90320_write_word_data(struct i2c_client *client, int page,
 120                                     int reg, u16 word)
 121 {
 122         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 123         struct ucd9000_data *data = to_ucd9000_data(info);
 124         int ret;
 125
 126         ucd90320_wait(data);
 127         ret = pmbus_write_word_data(client, page, reg, word);
 128         data->write_time = ktime_get();
 129
 130         return ret;
 131 }
 132
 133 static int ucd90320_write_byte(struct i2c_client *client, int page, u8 value)
 134 {
 135         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 136         struct ucd9000_data *data = to_ucd9000_data(info);
 137         int ret;
 138
 139         ucd90320_wait(data);
 140         ret = pmbus_write_byte(client, page, value);
 141         data->write_time = ktime_get();
 142
 143         return ret;
 144 }
 145
 146 static int ucd9000_get_fan_config(struct i2c_client *client, int fan)
 147 {
 148         int fan_config = 0;
 149         struct ucd9000_data *data
 150           = to_ucd9000_data(pmbus_get_driver_info(client));
 151
 152         if (data->fan_data[fan][3] & 1)
 153                 fan_config |= PB_FAN_2_INSTALLED;   /* Use lower bit position */
 154
 155         /* Pulses/revolution */
 156         fan_config |= (data->fan_data[fan][3] & 0x06) >> 1;
 157
 158         return fan_config;
 159 }
 160
 161 static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg)
 162 {
 163         int ret = 0;
 164         int fan_config;
 165
 166         switch (reg) {
 167         case PMBUS_FAN_CONFIG_12:
 168                 if (page > 0)
 169                         return -ENXIO;
 170
 171                 ret = ucd9000_get_fan_config(client, 0);
 172                 if (ret < 0)
 173                         return ret;
 174                 fan_config = ret << 4;
 175                 ret = ucd9000_get_fan_config(client, 1);
 176                 if (ret < 0)
 177                         return ret;
 178                 fan_config |= ret;
 179                 ret = fan_config;
 180                 break;
 181         case PMBUS_FAN_CONFIG_34:
 182                 if (page > 0)
 183                         return -ENXIO;
 184
 185                 ret = ucd9000_get_fan_config(client, 2);
 186                 if (ret < 0)
 187                         return ret;
 188                 fan_config = ret << 4;
 189                 ret = ucd9000_get_fan_config(client, 3);
 190                 if (ret < 0)
 191                         return ret;
 192                 fan_config |= ret;
 193                 ret = fan_config;
 194                 break;
 195         default:
 196                 ret = -ENODATA;
 197                 break;
 198         }
 199         return ret;
 200 }
 201
 202 static const struct i2c_device_id ucd9000_id[] = {
 203         {"ucd9000", ucd9000},
 204         {"ucd90120", ucd90120},
 205         {"ucd90124", ucd90124},
 206         {"ucd90160", ucd90160},
 207         {"ucd90320", ucd90320},
 208         {"ucd9090", ucd9090},
 209         {"ucd90910", ucd90910},
 210         {}
 211 };
 212 MODULE_DEVICE_TABLE(i2c, ucd9000_id);
 213
 214 static const struct of_device_id __maybe_unused ucd9000_of_match[] = {
 215         {
 216                 .compatible = "ti,ucd9000",
 217                 .data = (void *)ucd9000
 218         },
 219         {
 220                 .compatible = "ti,ucd90120",
 221                 .data = (void *)ucd90120
 222         },
 223         {
 224                 .compatible = "ti,ucd90124",
 225                 .data = (void *)ucd90124
 226         },
 227         {
 228                 .compatible = "ti,ucd90160",
 229                 .data = (void *)ucd90160
 230         },
 231         {
 232                 .compatible = "ti,ucd90320",
 233                 .data = (void *)ucd90320
 234         },
 235         {
 236                 .compatible = "ti,ucd9090",
 237                 .data = (void *)ucd9090
 238         },
 239         {
 240                 .compatible = "ti,ucd90910",
 241                 .data = (void *)ucd90910
 242         },
 243         { },
 244 };
 245 MODULE_DEVICE_TABLE(of, ucd9000_of_match);
 246
 247 #ifdef CONFIG_GPIOLIB
 248 static int ucd9000_gpio_read_config(struct i2c_client *client,
 249                                     unsigned int offset)
 250 {
 251         int ret;
 252
 253         /* No page set required */
 254         ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_SELECT, offset);
 255         if (ret < 0)
 256                 return ret;
 257
 258         return i2c_smbus_read_byte_data(client, UCD9000_GPIO_CONFIG);
 259 }
 260
 261 static int ucd9000_gpio_get(struct gpio_chip *gc, unsigned int offset)
 262 {
 263         struct i2c_client *client  = gpiochip_get_data(gc);
 264         int ret;
 265
 266         ret = ucd9000_gpio_read_config(client, offset);
 267         if (ret < 0)
 268                 return ret;
 269
 270         return !!(ret & UCD9000_GPIO_CONFIG_STATUS);
 271 }
 272
 273 static void ucd9000_gpio_set(struct gpio_chip *gc, unsigned int offset,
 274                              int value)
 275 {
 276         struct i2c_client *client = gpiochip_get_data(gc);
 277         int ret;
 278
 279         ret = ucd9000_gpio_read_config(client, offset);
 280         if (ret < 0) {
 281                 dev_dbg(&client->dev, "failed to read GPIO %d config: %d\n",
 282                         offset, ret);
 283                 return;
 284         }
 285
 286         if (value) {
 287                 if (ret & UCD9000_GPIO_CONFIG_STATUS)
 288                         return;
 289
 290                 ret |= UCD9000_GPIO_CONFIG_STATUS;
 291         } else {
 292                 if (!(ret & UCD9000_GPIO_CONFIG_STATUS))
 293                         return;
 294
 295                 ret &= ~UCD9000_GPIO_CONFIG_STATUS;
 296         }
 297
 298         ret |= UCD9000_GPIO_CONFIG_ENABLE;
 299
 300         /* Page set not required */
 301         ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
 302         if (ret < 0) {
 303                 dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n",
 304                         offset, ret);
 305                 return;
 306         }
 307
 308         ret &= ~UCD9000_GPIO_CONFIG_ENABLE;
 309
 310         ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
 311         if (ret < 0)
 312                 dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n",
 313                         offset, ret);
 314 }
 315
 316 static int ucd9000_gpio_get_direction(struct gpio_chip *gc,
 317                                       unsigned int offset)
 318 {
 319         struct i2c_client *client = gpiochip_get_data(gc);
 320         int ret;
 321
 322         ret = ucd9000_gpio_read_config(client, offset);
 323         if (ret < 0)
 324                 return ret;
 325
 326         return !(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE);
 327 }
 328
 329 static int ucd9000_gpio_set_direction(struct gpio_chip *gc,
 330                                       unsigned int offset, bool direction_out,
 331                                       int requested_out)
 332 {
 333         struct i2c_client *client = gpiochip_get_data(gc);
 334         int ret, config, out_val;
 335
 336         ret = ucd9000_gpio_read_config(client, offset);
 337         if (ret < 0)
 338                 return ret;
 339
 340         if (direction_out) {
 341                 out_val = requested_out ? UCD9000_GPIO_CONFIG_OUT_VALUE : 0;
 342
 343                 if (ret & UCD9000_GPIO_CONFIG_OUT_ENABLE) {
 344                         if ((ret & UCD9000_GPIO_CONFIG_OUT_VALUE) == out_val)
 345                                 return 0;
 346                 } else {
 347                         ret |= UCD9000_GPIO_CONFIG_OUT_ENABLE;
 348                 }
 349
 350                 if (out_val)
 351                         ret |= UCD9000_GPIO_CONFIG_OUT_VALUE;
 352                 else
 353                         ret &= ~UCD9000_GPIO_CONFIG_OUT_VALUE;
 354
 355         } else {
 356                 if (!(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE))
 357                         return 0;
 358
 359                 ret &= ~UCD9000_GPIO_CONFIG_OUT_ENABLE;
 360         }
 361
 362         ret |= UCD9000_GPIO_CONFIG_ENABLE;
 363         config = ret;
 364
 365         /* Page set not required */
 366         ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);
 367         if (ret < 0)
 368                 return ret;
 369
 370         config &= ~UCD9000_GPIO_CONFIG_ENABLE;
 371
 372         return i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);
 373 }
 374
 375 static int ucd9000_gpio_direction_input(struct gpio_chip *gc,
 376                                         unsigned int offset)
 377 {
 378         return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_INPUT, 0);
 379 }
 380
 381 static int ucd9000_gpio_direction_output(struct gpio_chip *gc,
 382                                          unsigned int offset, int val)
 383 {
 384         return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_OUTPUT,
 385                                           val);
 386 }
 387
 388 static void ucd9000_probe_gpio(struct i2c_client *client,
 389                                const struct i2c_device_id *mid,
 390                                struct ucd9000_data *data)
 391 {
 392         int rc;
 393
 394         switch (mid->driver_data) {
 395         case ucd9090:
 396                 data->gpio.ngpio = UCD9090_NUM_GPIOS;
 397                 break;
 398         case ucd90120:
 399         case ucd90124:
 400         case ucd90160:
 401                 data->gpio.ngpio = UCD901XX_NUM_GPIOS;
 402                 break;
 403         case ucd90320:
 404                 data->gpio.ngpio = UCD90320_NUM_GPIOS;
 405                 break;
 406         case ucd90910:
 407                 data->gpio.ngpio = UCD90910_NUM_GPIOS;
 408                 break;
 409         default:
 410                 return; /* GPIO support is optional. */
 411         }
 412
 413         /*
 414          * Pinmux support has not been added to the new gpio_chip.
 415          * This support should be added when possible given the mux
 416          * behavior of these IO devices.
 417          */
 418         data->gpio.label = client->name;
 419         data->gpio.get_direction = ucd9000_gpio_get_direction;
 420         data->gpio.direction_input = ucd9000_gpio_direction_input;
 421         data->gpio.direction_output = ucd9000_gpio_direction_output;
 422         data->gpio.get = ucd9000_gpio_get;
 423         data->gpio.set = ucd9000_gpio_set;
 424         data->gpio.can_sleep = true;
 425         data->gpio.base = -1;
 426         data->gpio.parent = &client->dev;
 427
 428         rc = devm_gpiochip_add_data(&client->dev, &data->gpio, client);
 429         if (rc)
 430                 dev_warn(&client->dev, "Could not add gpiochip: %d\n", rc);
 431 }
 432 #else
 433 static void ucd9000_probe_gpio(struct i2c_client *client,
 434                                const struct i2c_device_id *mid,
 435                                struct ucd9000_data *data)
 436 {
 437 }
 438 #endif /* CONFIG_GPIOLIB */
 439
 440 #ifdef CONFIG_DEBUG_FS
 441 static int ucd9000_get_mfr_status(struct i2c_client *client, u8 *buffer)
 442 {
 443         int ret = pmbus_set_page(client, 0, 0xff);
 444
 445         if (ret < 0)
 446                 return ret;
 447
 448         return i2c_smbus_read_block_data(client, UCD9000_MFR_STATUS, buffer);
 449 }
 450
 451 static int ucd9000_debugfs_show_mfr_status_bit(void *data, u64 *val)
 452 {
 453         struct ucd9000_debugfs_entry *entry = data;
 454         struct i2c_client *client = entry->client;
 455         u8 buffer[I2C_SMBUS_BLOCK_MAX];
 456         int ret, i;
 457
 458         ret = ucd9000_get_mfr_status(client, buffer);
 459         if (ret < 0)
 460                 return ret;
 461
 462         /*
 463          * GPI fault bits are in sets of 8, two bytes from end of response.
 464          */
 465         i = ret - 3 - entry->index / 8;
 466         if (i >= 0)
 467                 *val = !!(buffer[i] & BIT(entry->index % 8));
 468
 469         return 0;
 470 }
 471 DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_bit,
 472                          ucd9000_debugfs_show_mfr_status_bit, NULL, "%1lld\n");
 473
 474 static ssize_t ucd9000_debugfs_read_mfr_status(struct file *file,
 475                                                char __user *buf, size_t count,
 476                                                loff_t *ppos)
 477 {
 478         struct i2c_client *client = file->private_data;
 479         u8 buffer[I2C_SMBUS_BLOCK_MAX];
 480         char str[(I2C_SMBUS_BLOCK_MAX * 2) + 2];
 481         char *res;
 482         int rc;
 483
 484         rc = ucd9000_get_mfr_status(client, buffer);
 485         if (rc < 0)
 486                 return rc;
 487
 488         res = bin2hex(str, buffer, min(rc, I2C_SMBUS_BLOCK_MAX));
 489         *res++ = '\n';
 490         *res = 0;
 491
 492         return simple_read_from_buffer(buf, count, ppos, str, res - str);
 493 }
 494
 495 static const struct file_operations ucd9000_debugfs_show_mfr_status_fops = {
 496         .llseek = noop_llseek,
 497         .read = ucd9000_debugfs_read_mfr_status,
 498         .open = simple_open,
 499 };
 500
 501 static int ucd9000_init_debugfs(struct i2c_client *client,
 502                                 const struct i2c_device_id *mid,
 503                                 struct ucd9000_data *data)
 504 {
 505         struct dentry *debugfs;
 506         struct ucd9000_debugfs_entry *entries;
 507         int i, gpi_count;
 508         char name[UCD9000_DEBUGFS_NAME_LEN];
 509
 510         debugfs = pmbus_get_debugfs_dir(client);
 511         if (!debugfs)
 512                 return -ENOENT;
 513
 514         data->debugfs = debugfs_create_dir(client->name, debugfs);
 515
 516         /*
 517          * Of the chips this driver supports, only the UCD9090, UCD90160,
 518          * UCD90320, and UCD90910 report GPI faults in their MFR_STATUS
 519          * register, so only create the GPI fault debugfs attributes for those
 520          * chips.
 521          */
 522         if (mid->driver_data == ucd9090 || mid->driver_data == ucd90160 ||
 523             mid->driver_data == ucd90320 || mid->driver_data == ucd90910) {
 524                 gpi_count = mid->driver_data == ucd90320 ? UCD90320_GPI_COUNT
 525                                                          : UCD9000_GPI_COUNT;
 526                 entries = devm_kcalloc(&client->dev,
 527                                        gpi_count, sizeof(*entries),
 528                                        GFP_KERNEL);
 529                 if (!entries)
 530                         return -ENOMEM;
 531
 532                 for (i = 0; i < gpi_count; i++) {
 533                         entries[i].client = client;
 534                         entries[i].index = i;
 535                         scnprintf(name, UCD9000_DEBUGFS_NAME_LEN,
 536                                   "gpi%d_alarm", i + 1);
 537                         debugfs_create_file(name, 0444, data->debugfs,
 538                                             &entries[i],
 539                                             &ucd9000_debugfs_mfr_status_bit);
 540                 }
 541         }
 542
 543         scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, "mfr_status");
 544         debugfs_create_file(name, 0444, data->debugfs, client,
 545                             &ucd9000_debugfs_show_mfr_status_fops);
 546
 547         return 0;
 548 }
 549 #else
 550 static int ucd9000_init_debugfs(struct i2c_client *client,
 551                                 const struct i2c_device_id *mid,
 552                                 struct ucd9000_data *data)
 553 {
 554         return 0;
 555 }
 556 #endif /* CONFIG_DEBUG_FS */
 557
 558 static int ucd9000_probe(struct i2c_client *client)
 559 {
 560         u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
 561         struct ucd9000_data *data;
 562         struct pmbus_driver_info *info;
 563         const struct i2c_device_id *mid;
 564         enum chips chip;
 565         int i, ret;
 566
 567         if (!i2c_check_functionality(client->adapter,
 568                                      I2C_FUNC_SMBUS_BYTE_DATA |
 569                                      I2C_FUNC_SMBUS_BLOCK_DATA))
 570                 return -ENODEV;
 571
 572         ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID,
 573                                         block_buffer);
 574         if (ret < 0) {
 575                 dev_err(&client->dev, "Failed to read device ID\n");
 576                 return ret;
 577         }
 578         block_buffer[ret] = '\0';
 579         dev_info(&client->dev, "Device ID %s\n", block_buffer);
 580
 581         for (mid = ucd9000_id; mid->name[0]; mid++) {
 582                 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
 583                         break;
 584         }
 585         if (!mid->name[0]) {
 586                 dev_err(&client->dev, "Unsupported device\n");
 587                 return -ENODEV;
 588         }
 589
 590         if (client->dev.of_node)
 591                 chip = (uintptr_t)of_device_get_match_data(&client->dev);
 592         else
 593                 chip = mid->driver_data;
 594
 595         if (chip != ucd9000 && strcmp(client->name, mid->name) != 0)
 596                 dev_notice(&client->dev,
 597                            "Device mismatch: Configured %s, detected %s\n",
 598                            client->name, mid->name);
 599
 600         data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data),
 601                             GFP_KERNEL);
 602         if (!data)
 603                 return -ENOMEM;
 604         info = &data->info;
 605
 606         ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES);
 607         if (ret < 0) {
 608                 dev_err(&client->dev,
 609                         "Failed to read number of active pages\n");
 610                 return ret;
 611         }
 612         info->pages = ret;
 613         if (!info->pages) {
 614                 dev_err(&client->dev, "No pages configured\n");
 615                 return -ENODEV;
 616         }
 617
 618         /* The internal temperature sensor is always active */
 619         info->func[0] = PMBUS_HAVE_TEMP;
 620
 621         /* Everything else is configurable */
 622         ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG,
 623                                         block_buffer);
 624         if (ret <= 0) {
 625                 dev_err(&client->dev, "Failed to read configuration data\n");
 626                 return -ENODEV;
 627         }
 628         for (i = 0; i < ret; i++) {
 629                 int page = UCD9000_MON_PAGE(block_buffer[i]);
 630
 631                 if (page >= info->pages)
 632                         continue;
 633
 634                 switch (UCD9000_MON_TYPE(block_buffer[i])) {
 635                 case UCD9000_MON_VOLTAGE:
 636                 case UCD9000_MON_VOLTAGE_HW:
 637                         info->func[page] |= PMBUS_HAVE_VOUT
 638                           | PMBUS_HAVE_STATUS_VOUT;
 639                         break;
 640                 case UCD9000_MON_TEMPERATURE:
 641                         info->func[page] |= PMBUS_HAVE_TEMP2
 642                           | PMBUS_HAVE_STATUS_TEMP;
 643                         break;
 644                 case UCD9000_MON_CURRENT:
 645                         info->func[page] |= PMBUS_HAVE_IOUT
 646                           | PMBUS_HAVE_STATUS_IOUT;
 647                         break;
 648                 default:
 649                         break;
 650                 }
 651         }
 652
 653         /* Fan configuration */
 654         if (mid->driver_data == ucd90124) {
 655                 for (i = 0; i < UCD9000_NUM_FAN; i++) {
 656                         i2c_smbus_write_byte_data(client,
 657                                                   UCD9000_FAN_CONFIG_INDEX, i);
 658                         ret = i2c_smbus_read_block_data(client,
 659                                                         UCD9000_FAN_CONFIG,
 660                                                         data->fan_data[i]);
 661                         if (ret < 0)
 662                                 return ret;
 663                 }
 664                 i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);
 665
 666                 info->read_byte_data = ucd9000_read_byte_data;
 667                 info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
 668                   | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
 669         } else if (mid->driver_data == ucd90320) {
 670                 info->read_byte_data = ucd90320_read_byte_data;
 671                 info->read_word_data = ucd90320_read_word_data;
 672                 info->write_byte = ucd90320_write_byte;
 673                 info->write_word_data = ucd90320_write_word_data;
 674         }
 675
 676         ucd9000_probe_gpio(client, mid, data);
 677
 678         ret = pmbus_do_probe(client, info);
 679         if (ret)
 680                 return ret;
 681
 682         ret = ucd9000_init_debugfs(client, mid, data);
 683         if (ret)
 684                 dev_warn(&client->dev, "Failed to register debugfs: %d\n",
 685                          ret);
 686
 687         return 0;
 688 }
 689
 690 /* This is the driver that will be inserted */
 691 static struct i2c_driver ucd9000_driver = {
 692         .driver = {
 693                 .name = "ucd9000",
 694                 .of_match_table = of_match_ptr(ucd9000_of_match),
 695         },
 696         .probe = ucd9000_probe,
 697         .id_table = ucd9000_id,
 698 };
 699
 700 module_i2c_driver(ucd9000_driver);
 701
 702 MODULE_AUTHOR("Guenter Roeck");
 703 MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx");
 704 MODULE_LICENSE("GPL");
 705 MODULE_IMPORT_NS(PMBUS);