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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Copyright 2017 IBM Corp.
0004  */
0005 
0006 #include <linux/bitfield.h>
0007 #include <linux/bitops.h>
0008 #include <linux/debugfs.h>
0009 #include <linux/device.h>
0010 #include <linux/fs.h>
0011 #include <linux/i2c.h>
0012 #include <linux/jiffies.h>
0013 #include <linux/leds.h>
0014 #include <linux/module.h>
0015 #include <linux/mutex.h>
0016 #include <linux/of_device.h>
0017 #include <linux/pmbus.h>
0018 
0019 #include "pmbus.h"
0020 
0021 #define CFFPS_MFG_ID_CMD                        0x99
0022 #define CFFPS_FRU_CMD               0x9A
0023 #define CFFPS_PN_CMD                0x9B
0024 #define CFFPS_HEADER_CMD            0x9C
0025 #define CFFPS_SN_CMD                0x9E
0026 #define CFFPS_MAX_POWER_OUT_CMD         0xA7
0027 #define CFFPS_CCIN_CMD              0xBD
0028 #define CFFPS_FW_CMD                0xFA
0029 #define CFFPS1_FW_NUM_BYTES         4
0030 #define CFFPS2_FW_NUM_WORDS         3
0031 #define CFFPS_SYS_CONFIG_CMD            0xDA
0032 #define CFFPS_12VCS_VOUT_CMD            0xDE
0033 
0034 #define CFFPS_INPUT_HISTORY_CMD         0xD6
0035 #define CFFPS_INPUT_HISTORY_SIZE        100
0036 
0037 #define CFFPS_CCIN_REVISION         GENMASK(7, 0)
0038 #define CFFPS_CCIN_REVISION_LEGACY       0xde
0039 #define CFFPS_CCIN_VERSION          GENMASK(15, 8)
0040 #define CFFPS_CCIN_VERSION_1             0x2b
0041 #define CFFPS_CCIN_VERSION_2             0x2e
0042 #define CFFPS_CCIN_VERSION_3             0x51
0043 
0044 /* STATUS_MFR_SPECIFIC bits */
0045 #define CFFPS_MFR_FAN_FAULT         BIT(0)
0046 #define CFFPS_MFR_THERMAL_FAULT         BIT(1)
0047 #define CFFPS_MFR_OV_FAULT          BIT(2)
0048 #define CFFPS_MFR_UV_FAULT          BIT(3)
0049 #define CFFPS_MFR_PS_KILL           BIT(4)
0050 #define CFFPS_MFR_OC_FAULT          BIT(5)
0051 #define CFFPS_MFR_VAUX_FAULT            BIT(6)
0052 #define CFFPS_MFR_CURRENT_SHARE_WARNING     BIT(7)
0053 
0054 #define CFFPS_LED_BLINK             (BIT(0) | BIT(6))
0055 #define CFFPS_LED_ON                (BIT(1) | BIT(6))
0056 #define CFFPS_LED_OFF               (BIT(2) | BIT(6))
0057 #define CFFPS_BLINK_RATE_MS         250
0058 
0059 enum {
0060     CFFPS_DEBUGFS_INPUT_HISTORY = 0,
0061     CFFPS_DEBUGFS_MFG_ID,
0062     CFFPS_DEBUGFS_FRU,
0063     CFFPS_DEBUGFS_PN,
0064     CFFPS_DEBUGFS_HEADER,
0065     CFFPS_DEBUGFS_SN,
0066     CFFPS_DEBUGFS_MAX_POWER_OUT,
0067     CFFPS_DEBUGFS_CCIN,
0068     CFFPS_DEBUGFS_FW,
0069     CFFPS_DEBUGFS_ON_OFF_CONFIG,
0070     CFFPS_DEBUGFS_NUM_ENTRIES
0071 };
0072 
0073 enum versions { cffps1, cffps2, cffps_unknown };
0074 
0075 struct ibm_cffps_input_history {
0076     struct mutex update_lock;
0077     unsigned long last_update;
0078 
0079     u8 byte_count;
0080     u8 data[CFFPS_INPUT_HISTORY_SIZE];
0081 };
0082 
0083 struct ibm_cffps {
0084     enum versions version;
0085     struct i2c_client *client;
0086 
0087     struct ibm_cffps_input_history input_history;
0088 
0089     int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
0090 
0091     char led_name[32];
0092     u8 led_state;
0093     struct led_classdev led;
0094 };
0095 
0096 static const struct i2c_device_id ibm_cffps_id[];
0097 
0098 #define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
0099 
0100 static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
0101                         char __user *buf, size_t count,
0102                         loff_t *ppos)
0103 {
0104     int rc;
0105     u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
0106     u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
0107     struct i2c_msg msg[2] = {
0108         {
0109             .addr = psu->client->addr,
0110             .flags = psu->client->flags,
0111             .len = 1,
0112             .buf = msgbuf0,
0113         }, {
0114             .addr = psu->client->addr,
0115             .flags = psu->client->flags | I2C_M_RD,
0116             .len = CFFPS_INPUT_HISTORY_SIZE + 1,
0117             .buf = msgbuf1,
0118         },
0119     };
0120 
0121     if (!*ppos) {
0122         mutex_lock(&psu->input_history.update_lock);
0123         if (time_after(jiffies, psu->input_history.last_update + HZ)) {
0124             /*
0125              * Use a raw i2c transfer, since we need more bytes
0126              * than Linux I2C supports through smbus xfr (only 32).
0127              */
0128             rc = i2c_transfer(psu->client->adapter, msg, 2);
0129             if (rc < 0) {
0130                 mutex_unlock(&psu->input_history.update_lock);
0131                 return rc;
0132             }
0133 
0134             psu->input_history.byte_count = msgbuf1[0];
0135             memcpy(psu->input_history.data, &msgbuf1[1],
0136                    CFFPS_INPUT_HISTORY_SIZE);
0137             psu->input_history.last_update = jiffies;
0138         }
0139 
0140         mutex_unlock(&psu->input_history.update_lock);
0141     }
0142 
0143     return simple_read_from_buffer(buf, count, ppos,
0144                        psu->input_history.data,
0145                        psu->input_history.byte_count);
0146 }
0147 
0148 static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
0149                       size_t count, loff_t *ppos)
0150 {
0151     u8 cmd;
0152     int i, rc;
0153     int *idxp = file->private_data;
0154     int idx = *idxp;
0155     struct ibm_cffps *psu = to_psu(idxp, idx);
0156     char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
0157 
0158     pmbus_set_page(psu->client, 0, 0xff);
0159 
0160     switch (idx) {
0161     case CFFPS_DEBUGFS_INPUT_HISTORY:
0162         return ibm_cffps_read_input_history(psu, buf, count, ppos);
0163     case CFFPS_DEBUGFS_MFG_ID:
0164         cmd = CFFPS_MFG_ID_CMD;
0165         break;
0166     case CFFPS_DEBUGFS_FRU:
0167         cmd = CFFPS_FRU_CMD;
0168         break;
0169     case CFFPS_DEBUGFS_PN:
0170         cmd = CFFPS_PN_CMD;
0171         break;
0172     case CFFPS_DEBUGFS_HEADER:
0173         cmd = CFFPS_HEADER_CMD;
0174         break;
0175     case CFFPS_DEBUGFS_SN:
0176         cmd = CFFPS_SN_CMD;
0177         break;
0178     case CFFPS_DEBUGFS_MAX_POWER_OUT:
0179         if (psu->version == cffps1) {
0180             rc = i2c_smbus_read_word_swapped(psu->client,
0181                     CFFPS_MAX_POWER_OUT_CMD);
0182         } else {
0183             rc = i2c_smbus_read_word_data(psu->client,
0184                     CFFPS_MAX_POWER_OUT_CMD);
0185         }
0186 
0187         if (rc < 0)
0188             return rc;
0189 
0190         rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
0191         goto done;
0192     case CFFPS_DEBUGFS_CCIN:
0193         rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
0194         if (rc < 0)
0195             return rc;
0196 
0197         rc = snprintf(data, 5, "%04X", rc);
0198         goto done;
0199     case CFFPS_DEBUGFS_FW:
0200         switch (psu->version) {
0201         case cffps1:
0202             for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
0203                 rc = i2c_smbus_read_byte_data(psu->client,
0204                                   CFFPS_FW_CMD +
0205                                 i);
0206                 if (rc < 0)
0207                     return rc;
0208 
0209                 snprintf(&data[i * 2], 3, "%02X", rc);
0210             }
0211 
0212             rc = i * 2;
0213             break;
0214         case cffps2:
0215             for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
0216                 rc = i2c_smbus_read_word_data(psu->client,
0217                                   CFFPS_FW_CMD +
0218                                 i);
0219                 if (rc < 0)
0220                     return rc;
0221 
0222                 snprintf(&data[i * 4], 5, "%04X", rc);
0223             }
0224 
0225             rc = i * 4;
0226             break;
0227         default:
0228             return -EOPNOTSUPP;
0229         }
0230         goto done;
0231     case CFFPS_DEBUGFS_ON_OFF_CONFIG:
0232         rc = i2c_smbus_read_byte_data(psu->client,
0233                           PMBUS_ON_OFF_CONFIG);
0234         if (rc < 0)
0235             return rc;
0236 
0237         rc = snprintf(data, 3, "%02x", rc);
0238         goto done;
0239     default:
0240         return -EINVAL;
0241     }
0242 
0243     rc = i2c_smbus_read_block_data(psu->client, cmd, data);
0244     if (rc < 0)
0245         return rc;
0246 
0247 done:
0248     data[rc] = '\n';
0249     rc += 2;
0250 
0251     return simple_read_from_buffer(buf, count, ppos, data, rc);
0252 }
0253 
0254 static ssize_t ibm_cffps_debugfs_write(struct file *file,
0255                        const char __user *buf, size_t count,
0256                        loff_t *ppos)
0257 {
0258     u8 data;
0259     ssize_t rc;
0260     int *idxp = file->private_data;
0261     int idx = *idxp;
0262     struct ibm_cffps *psu = to_psu(idxp, idx);
0263 
0264     switch (idx) {
0265     case CFFPS_DEBUGFS_ON_OFF_CONFIG:
0266         pmbus_set_page(psu->client, 0, 0xff);
0267 
0268         rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
0269         if (rc <= 0)
0270             return rc;
0271 
0272         rc = i2c_smbus_write_byte_data(psu->client,
0273                            PMBUS_ON_OFF_CONFIG, data);
0274         if (rc)
0275             return rc;
0276 
0277         rc = 1;
0278         break;
0279     default:
0280         return -EINVAL;
0281     }
0282 
0283     return rc;
0284 }
0285 
0286 static const struct file_operations ibm_cffps_fops = {
0287     .llseek = noop_llseek,
0288     .read = ibm_cffps_debugfs_read,
0289     .write = ibm_cffps_debugfs_write,
0290     .open = simple_open,
0291 };
0292 
0293 static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
0294                     int reg)
0295 {
0296     int rc, mfr;
0297 
0298     switch (reg) {
0299     case PMBUS_STATUS_VOUT:
0300     case PMBUS_STATUS_IOUT:
0301     case PMBUS_STATUS_TEMPERATURE:
0302     case PMBUS_STATUS_FAN_12:
0303         rc = pmbus_read_byte_data(client, page, reg);
0304         if (rc < 0)
0305             return rc;
0306 
0307         mfr = pmbus_read_byte_data(client, page,
0308                        PMBUS_STATUS_MFR_SPECIFIC);
0309         if (mfr < 0)
0310             /*
0311              * Return the status register instead of an error,
0312              * since we successfully read status.
0313              */
0314             return rc;
0315 
0316         /* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
0317         if (reg == PMBUS_STATUS_FAN_12) {
0318             if (mfr & CFFPS_MFR_FAN_FAULT)
0319                 rc |= PB_FAN_FAN1_FAULT;
0320         } else if (reg == PMBUS_STATUS_TEMPERATURE) {
0321             if (mfr & CFFPS_MFR_THERMAL_FAULT)
0322                 rc |= PB_TEMP_OT_FAULT;
0323         } else if (reg == PMBUS_STATUS_VOUT) {
0324             if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
0325                 rc |= PB_VOLTAGE_OV_FAULT;
0326             if (mfr & CFFPS_MFR_UV_FAULT)
0327                 rc |= PB_VOLTAGE_UV_FAULT;
0328         } else if (reg == PMBUS_STATUS_IOUT) {
0329             if (mfr & CFFPS_MFR_OC_FAULT)
0330                 rc |= PB_IOUT_OC_FAULT;
0331             if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
0332                 rc |= PB_CURRENT_SHARE_FAULT;
0333         }
0334         break;
0335     default:
0336         rc = -ENODATA;
0337         break;
0338     }
0339 
0340     return rc;
0341 }
0342 
0343 static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
0344                     int phase, int reg)
0345 {
0346     int rc, mfr;
0347 
0348     switch (reg) {
0349     case PMBUS_STATUS_WORD:
0350         rc = pmbus_read_word_data(client, page, phase, reg);
0351         if (rc < 0)
0352             return rc;
0353 
0354         mfr = pmbus_read_byte_data(client, page,
0355                        PMBUS_STATUS_MFR_SPECIFIC);
0356         if (mfr < 0)
0357             /*
0358              * Return the status register instead of an error,
0359              * since we successfully read status.
0360              */
0361             return rc;
0362 
0363         if (mfr & CFFPS_MFR_PS_KILL)
0364             rc |= PB_STATUS_OFF;
0365         break;
0366     case PMBUS_VIRT_READ_VMON:
0367         rc = pmbus_read_word_data(client, page, phase,
0368                       CFFPS_12VCS_VOUT_CMD);
0369         break;
0370     default:
0371         rc = -ENODATA;
0372         break;
0373     }
0374 
0375     return rc;
0376 }
0377 
0378 static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
0379                     enum led_brightness brightness)
0380 {
0381     int rc;
0382     u8 next_led_state;
0383     struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
0384 
0385     if (brightness == LED_OFF) {
0386         next_led_state = CFFPS_LED_OFF;
0387     } else {
0388         brightness = LED_FULL;
0389 
0390         if (psu->led_state != CFFPS_LED_BLINK)
0391             next_led_state = CFFPS_LED_ON;
0392         else
0393             next_led_state = CFFPS_LED_BLINK;
0394     }
0395 
0396     dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
0397         brightness, next_led_state);
0398 
0399     pmbus_set_page(psu->client, 0, 0xff);
0400 
0401     rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
0402                        next_led_state);
0403     if (rc < 0)
0404         return rc;
0405 
0406     psu->led_state = next_led_state;
0407     led_cdev->brightness = brightness;
0408 
0409     return 0;
0410 }
0411 
0412 static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
0413                    unsigned long *delay_on,
0414                    unsigned long *delay_off)
0415 {
0416     int rc;
0417     struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
0418 
0419     dev_dbg(&psu->client->dev, "LED blink set.\n");
0420 
0421     pmbus_set_page(psu->client, 0, 0xff);
0422 
0423     rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
0424                        CFFPS_LED_BLINK);
0425     if (rc < 0)
0426         return rc;
0427 
0428     psu->led_state = CFFPS_LED_BLINK;
0429     led_cdev->brightness = LED_FULL;
0430     *delay_on = CFFPS_BLINK_RATE_MS;
0431     *delay_off = CFFPS_BLINK_RATE_MS;
0432 
0433     return 0;
0434 }
0435 
0436 static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
0437 {
0438     int rc;
0439     struct i2c_client *client = psu->client;
0440     struct device *dev = &client->dev;
0441 
0442     snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
0443          client->addr);
0444     psu->led.name = psu->led_name;
0445     psu->led.max_brightness = LED_FULL;
0446     psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
0447     psu->led.blink_set = ibm_cffps_led_blink_set;
0448 
0449     rc = devm_led_classdev_register(dev, &psu->led);
0450     if (rc)
0451         dev_warn(dev, "failed to register led class: %d\n", rc);
0452     else
0453         i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
0454                       CFFPS_LED_OFF);
0455 }
0456 
0457 static struct pmbus_driver_info ibm_cffps_info[] = {
0458     [cffps1] = {
0459         .pages = 1,
0460         .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
0461             PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
0462             PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
0463             PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
0464             PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
0465             PMBUS_HAVE_STATUS_FAN12,
0466         .read_byte_data = ibm_cffps_read_byte_data,
0467         .read_word_data = ibm_cffps_read_word_data,
0468     },
0469     [cffps2] = {
0470         .pages = 2,
0471         .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
0472             PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
0473             PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
0474             PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
0475             PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
0476             PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON,
0477         .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
0478             PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
0479             PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
0480         .read_byte_data = ibm_cffps_read_byte_data,
0481         .read_word_data = ibm_cffps_read_word_data,
0482     },
0483 };
0484 
0485 static struct pmbus_platform_data ibm_cffps_pdata = {
0486     .flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY,
0487 };
0488 
0489 static int ibm_cffps_probe(struct i2c_client *client)
0490 {
0491     int i, rc;
0492     enum versions vs = cffps_unknown;
0493     struct dentry *debugfs;
0494     struct dentry *ibm_cffps_dir;
0495     struct ibm_cffps *psu;
0496     const void *md = of_device_get_match_data(&client->dev);
0497     const struct i2c_device_id *id;
0498 
0499     if (md) {
0500         vs = (enum versions)md;
0501     } else {
0502         id = i2c_match_id(ibm_cffps_id, client);
0503         if (id)
0504             vs = (enum versions)id->driver_data;
0505     }
0506 
0507     if (vs == cffps_unknown) {
0508         u16 ccin_revision = 0;
0509         u16 ccin_version = CFFPS_CCIN_VERSION_1;
0510         int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
0511         char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
0512 
0513         if (ccin > 0) {
0514             ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
0515             ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
0516         }
0517 
0518         rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id);
0519         if (rc < 0) {
0520             dev_err(&client->dev, "Failed to read Manufacturer ID\n");
0521             return rc;
0522         }
0523 
0524         switch (ccin_version) {
0525         default:
0526         case CFFPS_CCIN_VERSION_1:
0527             if ((strncmp(mfg_id, "ACBE", 4) == 0) ||
0528                      (strncmp(mfg_id, "ARTE", 4) == 0))
0529                 vs = cffps1;
0530             else
0531                 vs = cffps2;
0532             break;
0533         case CFFPS_CCIN_VERSION_2:
0534             vs = cffps2;
0535             break;
0536         case CFFPS_CCIN_VERSION_3:
0537             if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
0538                 vs = cffps1;
0539             else
0540                 vs = cffps2;
0541             break;
0542         }
0543 
0544         /* Set the client name to include the version number. */
0545         snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
0546     }
0547 
0548     client->dev.platform_data = &ibm_cffps_pdata;
0549     rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
0550     if (rc)
0551         return rc;
0552 
0553     /*
0554      * Don't fail the probe if there isn't enough memory for leds and
0555      * debugfs.
0556      */
0557     psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
0558     if (!psu)
0559         return 0;
0560 
0561     psu->version = vs;
0562     psu->client = client;
0563     mutex_init(&psu->input_history.update_lock);
0564     psu->input_history.last_update = jiffies - HZ;
0565 
0566     ibm_cffps_create_led_class(psu);
0567 
0568     /* Don't fail the probe if we can't create debugfs */
0569     debugfs = pmbus_get_debugfs_dir(client);
0570     if (!debugfs)
0571         return 0;
0572 
0573     ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
0574     if (!ibm_cffps_dir)
0575         return 0;
0576 
0577     for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
0578         psu->debugfs_entries[i] = i;
0579 
0580     debugfs_create_file("input_history", 0444, ibm_cffps_dir,
0581                 &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
0582                 &ibm_cffps_fops);
0583     debugfs_create_file("mfg_id", 0444, ibm_cffps_dir,
0584                 &psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID],
0585                 &ibm_cffps_fops);
0586     debugfs_create_file("fru", 0444, ibm_cffps_dir,
0587                 &psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
0588                 &ibm_cffps_fops);
0589     debugfs_create_file("part_number", 0444, ibm_cffps_dir,
0590                 &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
0591                 &ibm_cffps_fops);
0592     debugfs_create_file("header", 0444, ibm_cffps_dir,
0593                 &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
0594                 &ibm_cffps_fops);
0595     debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
0596                 &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
0597                 &ibm_cffps_fops);
0598     debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
0599                 &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
0600                 &ibm_cffps_fops);
0601     debugfs_create_file("ccin", 0444, ibm_cffps_dir,
0602                 &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
0603                 &ibm_cffps_fops);
0604     debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
0605                 &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
0606                 &ibm_cffps_fops);
0607     debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
0608                 &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
0609                 &ibm_cffps_fops);
0610 
0611     return 0;
0612 }
0613 
0614 static const struct i2c_device_id ibm_cffps_id[] = {
0615     { "ibm_cffps1", cffps1 },
0616     { "ibm_cffps2", cffps2 },
0617     { "ibm_cffps", cffps_unknown },
0618     {}
0619 };
0620 MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
0621 
0622 static const struct of_device_id ibm_cffps_of_match[] = {
0623     {
0624         .compatible = "ibm,cffps1",
0625         .data = (void *)cffps1
0626     },
0627     {
0628         .compatible = "ibm,cffps2",
0629         .data = (void *)cffps2
0630     },
0631     {
0632         .compatible = "ibm,cffps",
0633         .data = (void *)cffps_unknown
0634     },
0635     {}
0636 };
0637 MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
0638 
0639 static struct i2c_driver ibm_cffps_driver = {
0640     .driver = {
0641         .name = "ibm-cffps",
0642         .of_match_table = ibm_cffps_of_match,
0643     },
0644     .probe_new = ibm_cffps_probe,
0645     .id_table = ibm_cffps_id,
0646 };
0647 
0648 module_i2c_driver(ibm_cffps_driver);
0649 
0650 MODULE_AUTHOR("Eddie James");
0651 MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
0652 MODULE_LICENSE("GPL");
0653 MODULE_IMPORT_NS(PMBUS);
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