1 /*************************************************************************** 2 * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> * 3 * * 4 * This program is free software; you can redistribute it and/or modify * 5 * it under the terms of the GNU General Public License as published by * 6 * the Free Software Foundation; either version 2 of the License, or * 7 * (at your option) any later version. * 8 * * 9 * This program is distributed in the hope that it will be useful, * 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 12 * GNU General Public License for more details. * 13 * * 14 * You should have received a copy of the GNU General Public License * 15 * along with this program; if not, write to the * 16 * Free Software Foundation, Inc., * 17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * 18 ***************************************************************************/ 19 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/slab.h> 25 #include <linux/jiffies.h> 26 #include <linux/platform_device.h> 27 #include <linux/hwmon.h> 28 #include <linux/hwmon-sysfs.h> 29 #include <linux/err.h> 30 #include <linux/mutex.h> 31 #include "sch56xx-common.h" 32 33 #define DRVNAME "sch5627" 34 #define DEVNAME DRVNAME /* We only support one model */ 35 36 #define SCH5627_HWMON_ID 0xa5 37 #define SCH5627_COMPANY_ID 0x5c 38 #define SCH5627_PRIMARY_ID 0xa0 39 40 #define SCH5627_REG_BUILD_CODE 0x39 41 #define SCH5627_REG_BUILD_ID 0x3a 42 #define SCH5627_REG_HWMON_ID 0x3c 43 #define SCH5627_REG_HWMON_REV 0x3d 44 #define SCH5627_REG_COMPANY_ID 0x3e 45 #define SCH5627_REG_PRIMARY_ID 0x3f 46 #define SCH5627_REG_CTRL 0x40 47 48 #define SCH5627_NO_TEMPS 8 49 #define SCH5627_NO_FANS 4 50 #define SCH5627_NO_IN 5 51 52 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { 53 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; 54 static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { 55 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; 56 static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { 57 0, 0, 1, 1, 0, 0, 0, 1 }; 58 static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { 59 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; 60 static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { 61 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; 62 63 static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { 64 0x2C, 0x2E, 0x30, 0x32 }; 65 static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { 66 0x62, 0x64, 0x66, 0x68 }; 67 68 static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { 69 0x22, 0x23, 0x24, 0x25, 0x189 }; 70 static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { 71 0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; 72 static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { 73 1, 0, 1, 0, 1 }; 74 static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { 75 10745, 3660, 9765, 10745, 3660 }; 76 static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { 77 "VCC", "VTT", "VBAT", "VTR", "V_IN" }; 78 79 struct sch5627_data { 80 unsigned short addr; 81 struct device *hwmon_dev; 82 struct sch56xx_watchdog_data *watchdog; 83 u8 control; 84 u8 temp_max[SCH5627_NO_TEMPS]; 85 u8 temp_crit[SCH5627_NO_TEMPS]; 86 u16 fan_min[SCH5627_NO_FANS]; 87 88 struct mutex update_lock; 89 unsigned long last_battery; /* In jiffies */ 90 char valid; /* !=0 if following fields are valid */ 91 unsigned long last_updated; /* In jiffies */ 92 u16 temp[SCH5627_NO_TEMPS]; 93 u16 fan[SCH5627_NO_FANS]; 94 u16 in[SCH5627_NO_IN]; 95 }; 96 97 static struct sch5627_data *sch5627_update_device(struct device *dev) 98 { 99 struct sch5627_data *data = dev_get_drvdata(dev); 100 struct sch5627_data *ret = data; 101 int i, val; 102 103 mutex_lock(&data->update_lock); 104 105 /* Trigger a Vbat voltage measurement every 5 minutes */ 106 if (time_after(jiffies, data->last_battery + 300 * HZ)) { 107 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, 108 data->control | 0x10); 109 data->last_battery = jiffies; 110 } 111 112 /* Cache the values for 1 second */ 113 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 114 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 115 val = sch56xx_read_virtual_reg12(data->addr, 116 SCH5627_REG_TEMP_MSB[i], 117 SCH5627_REG_TEMP_LSN[i], 118 SCH5627_REG_TEMP_HIGH_NIBBLE[i]); 119 if (unlikely(val < 0)) { 120 ret = ERR_PTR(val); 121 goto abort; 122 } 123 data->temp[i] = val; 124 } 125 126 for (i = 0; i < SCH5627_NO_FANS; i++) { 127 val = sch56xx_read_virtual_reg16(data->addr, 128 SCH5627_REG_FAN[i]); 129 if (unlikely(val < 0)) { 130 ret = ERR_PTR(val); 131 goto abort; 132 } 133 data->fan[i] = val; 134 } 135 136 for (i = 0; i < SCH5627_NO_IN; i++) { 137 val = sch56xx_read_virtual_reg12(data->addr, 138 SCH5627_REG_IN_MSB[i], 139 SCH5627_REG_IN_LSN[i], 140 SCH5627_REG_IN_HIGH_NIBBLE[i]); 141 if (unlikely(val < 0)) { 142 ret = ERR_PTR(val); 143 goto abort; 144 } 145 data->in[i] = val; 146 } 147 148 data->last_updated = jiffies; 149 data->valid = 1; 150 } 151 abort: 152 mutex_unlock(&data->update_lock); 153 return ret; 154 } 155 156 static int sch5627_read_limits(struct sch5627_data *data) 157 { 158 int i, val; 159 160 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 161 /* 162 * Note what SMSC calls ABS, is what lm_sensors calls max 163 * (aka high), and HIGH is what lm_sensors calls crit. 164 */ 165 val = sch56xx_read_virtual_reg(data->addr, 166 SCH5627_REG_TEMP_ABS[i]); 167 if (val < 0) 168 return val; 169 data->temp_max[i] = val; 170 171 val = sch56xx_read_virtual_reg(data->addr, 172 SCH5627_REG_TEMP_HIGH[i]); 173 if (val < 0) 174 return val; 175 data->temp_crit[i] = val; 176 } 177 for (i = 0; i < SCH5627_NO_FANS; i++) { 178 val = sch56xx_read_virtual_reg16(data->addr, 179 SCH5627_REG_FAN_MIN[i]); 180 if (val < 0) 181 return val; 182 data->fan_min[i] = val; 183 } 184 185 return 0; 186 } 187 188 static int reg_to_temp(u16 reg) 189 { 190 return (reg * 625) / 10 - 64000; 191 } 192 193 static int reg_to_temp_limit(u8 reg) 194 { 195 return (reg - 64) * 1000; 196 } 197 198 static int reg_to_rpm(u16 reg) 199 { 200 if (reg == 0) 201 return -EIO; 202 if (reg == 0xffff) 203 return 0; 204 205 return 5400540 / reg; 206 } 207 208 static ssize_t name_show(struct device *dev, struct device_attribute *devattr, 209 char *buf) 210 { 211 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME); 212 } 213 214 static ssize_t show_temp(struct device *dev, struct device_attribute 215 *devattr, char *buf) 216 { 217 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 218 struct sch5627_data *data = sch5627_update_device(dev); 219 int val; 220 221 if (IS_ERR(data)) 222 return PTR_ERR(data); 223 224 val = reg_to_temp(data->temp[attr->index]); 225 return snprintf(buf, PAGE_SIZE, "%d\n", val); 226 } 227 228 static ssize_t show_temp_fault(struct device *dev, struct device_attribute 229 *devattr, char *buf) 230 { 231 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 232 struct sch5627_data *data = sch5627_update_device(dev); 233 234 if (IS_ERR(data)) 235 return PTR_ERR(data); 236 237 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0); 238 } 239 240 static ssize_t show_temp_max(struct device *dev, struct device_attribute 241 *devattr, char *buf) 242 { 243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 244 struct sch5627_data *data = dev_get_drvdata(dev); 245 int val; 246 247 val = reg_to_temp_limit(data->temp_max[attr->index]); 248 return snprintf(buf, PAGE_SIZE, "%d\n", val); 249 } 250 251 static ssize_t show_temp_crit(struct device *dev, struct device_attribute 252 *devattr, char *buf) 253 { 254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 255 struct sch5627_data *data = dev_get_drvdata(dev); 256 int val; 257 258 val = reg_to_temp_limit(data->temp_crit[attr->index]); 259 return snprintf(buf, PAGE_SIZE, "%d\n", val); 260 } 261 262 static ssize_t show_fan(struct device *dev, struct device_attribute 263 *devattr, char *buf) 264 { 265 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 266 struct sch5627_data *data = sch5627_update_device(dev); 267 int val; 268 269 if (IS_ERR(data)) 270 return PTR_ERR(data); 271 272 val = reg_to_rpm(data->fan[attr->index]); 273 if (val < 0) 274 return val; 275 276 return snprintf(buf, PAGE_SIZE, "%d\n", val); 277 } 278 279 static ssize_t show_fan_fault(struct device *dev, struct device_attribute 280 *devattr, char *buf) 281 { 282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 283 struct sch5627_data *data = sch5627_update_device(dev); 284 285 if (IS_ERR(data)) 286 return PTR_ERR(data); 287 288 return snprintf(buf, PAGE_SIZE, "%d\n", 289 data->fan[attr->index] == 0xffff); 290 } 291 292 static ssize_t show_fan_min(struct device *dev, struct device_attribute 293 *devattr, char *buf) 294 { 295 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 296 struct sch5627_data *data = dev_get_drvdata(dev); 297 int val = reg_to_rpm(data->fan_min[attr->index]); 298 if (val < 0) 299 return val; 300 301 return snprintf(buf, PAGE_SIZE, "%d\n", val); 302 } 303 304 static ssize_t show_in(struct device *dev, struct device_attribute 305 *devattr, char *buf) 306 { 307 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 308 struct sch5627_data *data = sch5627_update_device(dev); 309 int val; 310 311 if (IS_ERR(data)) 312 return PTR_ERR(data); 313 314 val = DIV_ROUND_CLOSEST( 315 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index], 316 10000); 317 return snprintf(buf, PAGE_SIZE, "%d\n", val); 318 } 319 320 static ssize_t show_in_label(struct device *dev, struct device_attribute 321 *devattr, char *buf) 322 { 323 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 324 325 return snprintf(buf, PAGE_SIZE, "%s\n", 326 SCH5627_IN_LABELS[attr->index]); 327 } 328 329 static DEVICE_ATTR_RO(name); 330 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 331 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 332 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 333 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 334 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 335 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 336 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 337 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 338 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); 339 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); 340 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); 341 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); 342 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); 343 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); 344 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); 345 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); 346 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0); 347 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1); 348 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2); 349 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3); 350 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4); 351 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5); 352 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6); 353 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7); 354 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0); 355 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1); 356 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2); 357 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3); 358 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4); 359 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5); 360 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6); 361 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7); 362 363 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 364 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 365 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 366 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 367 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); 368 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); 369 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); 370 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); 371 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0); 372 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1); 373 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2); 374 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3); 375 376 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0); 377 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1); 378 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2); 379 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3); 380 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4); 381 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0); 382 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1); 383 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2); 384 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3); 385 386 static struct attribute *sch5627_attributes[] = { 387 &dev_attr_name.attr, 388 389 &sensor_dev_attr_temp1_input.dev_attr.attr, 390 &sensor_dev_attr_temp2_input.dev_attr.attr, 391 &sensor_dev_attr_temp3_input.dev_attr.attr, 392 &sensor_dev_attr_temp4_input.dev_attr.attr, 393 &sensor_dev_attr_temp5_input.dev_attr.attr, 394 &sensor_dev_attr_temp6_input.dev_attr.attr, 395 &sensor_dev_attr_temp7_input.dev_attr.attr, 396 &sensor_dev_attr_temp8_input.dev_attr.attr, 397 &sensor_dev_attr_temp1_fault.dev_attr.attr, 398 &sensor_dev_attr_temp2_fault.dev_attr.attr, 399 &sensor_dev_attr_temp3_fault.dev_attr.attr, 400 &sensor_dev_attr_temp4_fault.dev_attr.attr, 401 &sensor_dev_attr_temp5_fault.dev_attr.attr, 402 &sensor_dev_attr_temp6_fault.dev_attr.attr, 403 &sensor_dev_attr_temp7_fault.dev_attr.attr, 404 &sensor_dev_attr_temp8_fault.dev_attr.attr, 405 &sensor_dev_attr_temp1_max.dev_attr.attr, 406 &sensor_dev_attr_temp2_max.dev_attr.attr, 407 &sensor_dev_attr_temp3_max.dev_attr.attr, 408 &sensor_dev_attr_temp4_max.dev_attr.attr, 409 &sensor_dev_attr_temp5_max.dev_attr.attr, 410 &sensor_dev_attr_temp6_max.dev_attr.attr, 411 &sensor_dev_attr_temp7_max.dev_attr.attr, 412 &sensor_dev_attr_temp8_max.dev_attr.attr, 413 &sensor_dev_attr_temp1_crit.dev_attr.attr, 414 &sensor_dev_attr_temp2_crit.dev_attr.attr, 415 &sensor_dev_attr_temp3_crit.dev_attr.attr, 416 &sensor_dev_attr_temp4_crit.dev_attr.attr, 417 &sensor_dev_attr_temp5_crit.dev_attr.attr, 418 &sensor_dev_attr_temp6_crit.dev_attr.attr, 419 &sensor_dev_attr_temp7_crit.dev_attr.attr, 420 &sensor_dev_attr_temp8_crit.dev_attr.attr, 421 422 &sensor_dev_attr_fan1_input.dev_attr.attr, 423 &sensor_dev_attr_fan2_input.dev_attr.attr, 424 &sensor_dev_attr_fan3_input.dev_attr.attr, 425 &sensor_dev_attr_fan4_input.dev_attr.attr, 426 &sensor_dev_attr_fan1_fault.dev_attr.attr, 427 &sensor_dev_attr_fan2_fault.dev_attr.attr, 428 &sensor_dev_attr_fan3_fault.dev_attr.attr, 429 &sensor_dev_attr_fan4_fault.dev_attr.attr, 430 &sensor_dev_attr_fan1_min.dev_attr.attr, 431 &sensor_dev_attr_fan2_min.dev_attr.attr, 432 &sensor_dev_attr_fan3_min.dev_attr.attr, 433 &sensor_dev_attr_fan4_min.dev_attr.attr, 434 435 &sensor_dev_attr_in0_input.dev_attr.attr, 436 &sensor_dev_attr_in1_input.dev_attr.attr, 437 &sensor_dev_attr_in2_input.dev_attr.attr, 438 &sensor_dev_attr_in3_input.dev_attr.attr, 439 &sensor_dev_attr_in4_input.dev_attr.attr, 440 &sensor_dev_attr_in0_label.dev_attr.attr, 441 &sensor_dev_attr_in1_label.dev_attr.attr, 442 &sensor_dev_attr_in2_label.dev_attr.attr, 443 &sensor_dev_attr_in3_label.dev_attr.attr, 444 /* No in4_label as in4 is a generic input pin */ 445 446 NULL 447 }; 448 449 static const struct attribute_group sch5627_group = { 450 .attrs = sch5627_attributes, 451 }; 452 453 static int sch5627_remove(struct platform_device *pdev) 454 { 455 struct sch5627_data *data = platform_get_drvdata(pdev); 456 457 if (data->watchdog) 458 sch56xx_watchdog_unregister(data->watchdog); 459 460 if (data->hwmon_dev) 461 hwmon_device_unregister(data->hwmon_dev); 462 463 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group); 464 465 return 0; 466 } 467 468 static int sch5627_probe(struct platform_device *pdev) 469 { 470 struct sch5627_data *data; 471 int err, build_code, build_id, hwmon_rev, val; 472 473 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data), 474 GFP_KERNEL); 475 if (!data) 476 return -ENOMEM; 477 478 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 479 mutex_init(&data->update_lock); 480 platform_set_drvdata(pdev, data); 481 482 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID); 483 if (val < 0) { 484 err = val; 485 goto error; 486 } 487 if (val != SCH5627_HWMON_ID) { 488 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", 489 val, SCH5627_HWMON_ID); 490 err = -ENODEV; 491 goto error; 492 } 493 494 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID); 495 if (val < 0) { 496 err = val; 497 goto error; 498 } 499 if (val != SCH5627_COMPANY_ID) { 500 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", 501 val, SCH5627_COMPANY_ID); 502 err = -ENODEV; 503 goto error; 504 } 505 506 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID); 507 if (val < 0) { 508 err = val; 509 goto error; 510 } 511 if (val != SCH5627_PRIMARY_ID) { 512 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", 513 val, SCH5627_PRIMARY_ID); 514 err = -ENODEV; 515 goto error; 516 } 517 518 build_code = sch56xx_read_virtual_reg(data->addr, 519 SCH5627_REG_BUILD_CODE); 520 if (build_code < 0) { 521 err = build_code; 522 goto error; 523 } 524 525 build_id = sch56xx_read_virtual_reg16(data->addr, 526 SCH5627_REG_BUILD_ID); 527 if (build_id < 0) { 528 err = build_id; 529 goto error; 530 } 531 532 hwmon_rev = sch56xx_read_virtual_reg(data->addr, 533 SCH5627_REG_HWMON_REV); 534 if (hwmon_rev < 0) { 535 err = hwmon_rev; 536 goto error; 537 } 538 539 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL); 540 if (val < 0) { 541 err = val; 542 goto error; 543 } 544 data->control = val; 545 if (!(data->control & 0x01)) { 546 pr_err("hardware monitoring not enabled\n"); 547 err = -ENODEV; 548 goto error; 549 } 550 /* Trigger a Vbat voltage measurement, so that we get a valid reading 551 the first time we read Vbat */ 552 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, 553 data->control | 0x10); 554 data->last_battery = jiffies; 555 556 /* 557 * Read limits, we do this only once as reading a register on 558 * the sch5627 is quite expensive (and they don't change). 559 */ 560 err = sch5627_read_limits(data); 561 if (err) 562 goto error; 563 564 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr); 565 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", 566 build_code, build_id, hwmon_rev); 567 568 /* Register sysfs interface files */ 569 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group); 570 if (err) 571 goto error; 572 573 data->hwmon_dev = hwmon_device_register(&pdev->dev); 574 if (IS_ERR(data->hwmon_dev)) { 575 err = PTR_ERR(data->hwmon_dev); 576 data->hwmon_dev = NULL; 577 goto error; 578 } 579 580 /* Note failing to register the watchdog is not a fatal error */ 581 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr, 582 (build_code << 24) | (build_id << 8) | hwmon_rev, 583 &data->update_lock, 1); 584 585 return 0; 586 587 error: 588 sch5627_remove(pdev); 589 return err; 590 } 591 592 static struct platform_driver sch5627_driver = { 593 .driver = { 594 .name = DRVNAME, 595 }, 596 .probe = sch5627_probe, 597 .remove = sch5627_remove, 598 }; 599 600 module_platform_driver(sch5627_driver); 601 602 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); 603 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 604 MODULE_LICENSE("GPL"); 605