1 /*************************************************************************** 2 * Copyright (C) 2010-2011 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 u8 control; 83 u8 temp_max[SCH5627_NO_TEMPS]; 84 u8 temp_crit[SCH5627_NO_TEMPS]; 85 u16 fan_min[SCH5627_NO_FANS]; 86 87 struct mutex update_lock; 88 unsigned long last_battery; /* In jiffies */ 89 char valid; /* !=0 if following fields are valid */ 90 unsigned long last_updated; /* In jiffies */ 91 u16 temp[SCH5627_NO_TEMPS]; 92 u16 fan[SCH5627_NO_FANS]; 93 u16 in[SCH5627_NO_IN]; 94 }; 95 96 static struct sch5627_data *sch5627_update_device(struct device *dev) 97 { 98 struct sch5627_data *data = dev_get_drvdata(dev); 99 struct sch5627_data *ret = data; 100 int i, val; 101 102 mutex_lock(&data->update_lock); 103 104 /* Trigger a Vbat voltage measurement every 5 minutes */ 105 if (time_after(jiffies, data->last_battery + 300 * HZ)) { 106 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, 107 data->control | 0x10); 108 data->last_battery = jiffies; 109 } 110 111 /* Cache the values for 1 second */ 112 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 113 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 114 val = sch56xx_read_virtual_reg12(data->addr, 115 SCH5627_REG_TEMP_MSB[i], 116 SCH5627_REG_TEMP_LSN[i], 117 SCH5627_REG_TEMP_HIGH_NIBBLE[i]); 118 if (unlikely(val < 0)) { 119 ret = ERR_PTR(val); 120 goto abort; 121 } 122 data->temp[i] = val; 123 } 124 125 for (i = 0; i < SCH5627_NO_FANS; i++) { 126 val = sch56xx_read_virtual_reg16(data->addr, 127 SCH5627_REG_FAN[i]); 128 if (unlikely(val < 0)) { 129 ret = ERR_PTR(val); 130 goto abort; 131 } 132 data->fan[i] = val; 133 } 134 135 for (i = 0; i < SCH5627_NO_IN; i++) { 136 val = sch56xx_read_virtual_reg12(data->addr, 137 SCH5627_REG_IN_MSB[i], 138 SCH5627_REG_IN_LSN[i], 139 SCH5627_REG_IN_HIGH_NIBBLE[i]); 140 if (unlikely(val < 0)) { 141 ret = ERR_PTR(val); 142 goto abort; 143 } 144 data->in[i] = val; 145 } 146 147 data->last_updated = jiffies; 148 data->valid = 1; 149 } 150 abort: 151 mutex_unlock(&data->update_lock); 152 return ret; 153 } 154 155 static int __devinit sch5627_read_limits(struct sch5627_data *data) 156 { 157 int i, val; 158 159 for (i = 0; i < SCH5627_NO_TEMPS; i++) { 160 /* 161 * Note what SMSC calls ABS, is what lm_sensors calls max 162 * (aka high), and HIGH is what lm_sensors calls crit. 163 */ 164 val = sch56xx_read_virtual_reg(data->addr, 165 SCH5627_REG_TEMP_ABS[i]); 166 if (val < 0) 167 return val; 168 data->temp_max[i] = val; 169 170 val = sch56xx_read_virtual_reg(data->addr, 171 SCH5627_REG_TEMP_HIGH[i]); 172 if (val < 0) 173 return val; 174 data->temp_crit[i] = val; 175 } 176 for (i = 0; i < SCH5627_NO_FANS; i++) { 177 val = sch56xx_read_virtual_reg16(data->addr, 178 SCH5627_REG_FAN_MIN[i]); 179 if (val < 0) 180 return val; 181 data->fan_min[i] = val; 182 } 183 184 return 0; 185 } 186 187 static int reg_to_temp(u16 reg) 188 { 189 return (reg * 625) / 10 - 64000; 190 } 191 192 static int reg_to_temp_limit(u8 reg) 193 { 194 return (reg - 64) * 1000; 195 } 196 197 static int reg_to_rpm(u16 reg) 198 { 199 if (reg == 0) 200 return -EIO; 201 if (reg == 0xffff) 202 return 0; 203 204 return 5400540 / reg; 205 } 206 207 static ssize_t show_name(struct device *dev, struct device_attribute *devattr, 208 char *buf) 209 { 210 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME); 211 } 212 213 static ssize_t show_temp(struct device *dev, struct device_attribute 214 *devattr, char *buf) 215 { 216 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 217 struct sch5627_data *data = sch5627_update_device(dev); 218 int val; 219 220 if (IS_ERR(data)) 221 return PTR_ERR(data); 222 223 val = reg_to_temp(data->temp[attr->index]); 224 return snprintf(buf, PAGE_SIZE, "%d\n", val); 225 } 226 227 static ssize_t show_temp_fault(struct device *dev, struct device_attribute 228 *devattr, char *buf) 229 { 230 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 231 struct sch5627_data *data = sch5627_update_device(dev); 232 233 if (IS_ERR(data)) 234 return PTR_ERR(data); 235 236 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0); 237 } 238 239 static ssize_t show_temp_max(struct device *dev, struct device_attribute 240 *devattr, char *buf) 241 { 242 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 243 struct sch5627_data *data = dev_get_drvdata(dev); 244 int val; 245 246 val = reg_to_temp_limit(data->temp_max[attr->index]); 247 return snprintf(buf, PAGE_SIZE, "%d\n", val); 248 } 249 250 static ssize_t show_temp_crit(struct device *dev, struct device_attribute 251 *devattr, char *buf) 252 { 253 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 254 struct sch5627_data *data = dev_get_drvdata(dev); 255 int val; 256 257 val = reg_to_temp_limit(data->temp_crit[attr->index]); 258 return snprintf(buf, PAGE_SIZE, "%d\n", val); 259 } 260 261 static ssize_t show_fan(struct device *dev, struct device_attribute 262 *devattr, char *buf) 263 { 264 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 265 struct sch5627_data *data = sch5627_update_device(dev); 266 int val; 267 268 if (IS_ERR(data)) 269 return PTR_ERR(data); 270 271 val = reg_to_rpm(data->fan[attr->index]); 272 if (val < 0) 273 return val; 274 275 return snprintf(buf, PAGE_SIZE, "%d\n", val); 276 } 277 278 static ssize_t show_fan_fault(struct device *dev, struct device_attribute 279 *devattr, char *buf) 280 { 281 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 282 struct sch5627_data *data = sch5627_update_device(dev); 283 284 if (IS_ERR(data)) 285 return PTR_ERR(data); 286 287 return snprintf(buf, PAGE_SIZE, "%d\n", 288 data->fan[attr->index] == 0xffff); 289 } 290 291 static ssize_t show_fan_min(struct device *dev, struct device_attribute 292 *devattr, char *buf) 293 { 294 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 295 struct sch5627_data *data = dev_get_drvdata(dev); 296 int val = reg_to_rpm(data->fan_min[attr->index]); 297 if (val < 0) 298 return val; 299 300 return snprintf(buf, PAGE_SIZE, "%d\n", val); 301 } 302 303 static ssize_t show_in(struct device *dev, struct device_attribute 304 *devattr, char *buf) 305 { 306 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 307 struct sch5627_data *data = sch5627_update_device(dev); 308 int val; 309 310 if (IS_ERR(data)) 311 return PTR_ERR(data); 312 313 val = DIV_ROUND_CLOSEST( 314 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index], 315 10000); 316 return snprintf(buf, PAGE_SIZE, "%d\n", val); 317 } 318 319 static ssize_t show_in_label(struct device *dev, struct device_attribute 320 *devattr, char *buf) 321 { 322 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 323 324 return snprintf(buf, PAGE_SIZE, "%s\n", 325 SCH5627_IN_LABELS[attr->index]); 326 } 327 328 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 329 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 330 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 331 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 332 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 333 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 334 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 335 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 336 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 337 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); 338 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); 339 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); 340 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); 341 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4); 342 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5); 343 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6); 344 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7); 345 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0); 346 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1); 347 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2); 348 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3); 349 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4); 350 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5); 351 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6); 352 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7); 353 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0); 354 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1); 355 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2); 356 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3); 357 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4); 358 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5); 359 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6); 360 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7); 361 362 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 363 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 364 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 365 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 366 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); 367 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); 368 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); 369 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); 370 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0); 371 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1); 372 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2); 373 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3); 374 375 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0); 376 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1); 377 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2); 378 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3); 379 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4); 380 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0); 381 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1); 382 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2); 383 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3); 384 385 static struct attribute *sch5627_attributes[] = { 386 &dev_attr_name.attr, 387 388 &sensor_dev_attr_temp1_input.dev_attr.attr, 389 &sensor_dev_attr_temp2_input.dev_attr.attr, 390 &sensor_dev_attr_temp3_input.dev_attr.attr, 391 &sensor_dev_attr_temp4_input.dev_attr.attr, 392 &sensor_dev_attr_temp5_input.dev_attr.attr, 393 &sensor_dev_attr_temp6_input.dev_attr.attr, 394 &sensor_dev_attr_temp7_input.dev_attr.attr, 395 &sensor_dev_attr_temp8_input.dev_attr.attr, 396 &sensor_dev_attr_temp1_fault.dev_attr.attr, 397 &sensor_dev_attr_temp2_fault.dev_attr.attr, 398 &sensor_dev_attr_temp3_fault.dev_attr.attr, 399 &sensor_dev_attr_temp4_fault.dev_attr.attr, 400 &sensor_dev_attr_temp5_fault.dev_attr.attr, 401 &sensor_dev_attr_temp6_fault.dev_attr.attr, 402 &sensor_dev_attr_temp7_fault.dev_attr.attr, 403 &sensor_dev_attr_temp8_fault.dev_attr.attr, 404 &sensor_dev_attr_temp1_max.dev_attr.attr, 405 &sensor_dev_attr_temp2_max.dev_attr.attr, 406 &sensor_dev_attr_temp3_max.dev_attr.attr, 407 &sensor_dev_attr_temp4_max.dev_attr.attr, 408 &sensor_dev_attr_temp5_max.dev_attr.attr, 409 &sensor_dev_attr_temp6_max.dev_attr.attr, 410 &sensor_dev_attr_temp7_max.dev_attr.attr, 411 &sensor_dev_attr_temp8_max.dev_attr.attr, 412 &sensor_dev_attr_temp1_crit.dev_attr.attr, 413 &sensor_dev_attr_temp2_crit.dev_attr.attr, 414 &sensor_dev_attr_temp3_crit.dev_attr.attr, 415 &sensor_dev_attr_temp4_crit.dev_attr.attr, 416 &sensor_dev_attr_temp5_crit.dev_attr.attr, 417 &sensor_dev_attr_temp6_crit.dev_attr.attr, 418 &sensor_dev_attr_temp7_crit.dev_attr.attr, 419 &sensor_dev_attr_temp8_crit.dev_attr.attr, 420 421 &sensor_dev_attr_fan1_input.dev_attr.attr, 422 &sensor_dev_attr_fan2_input.dev_attr.attr, 423 &sensor_dev_attr_fan3_input.dev_attr.attr, 424 &sensor_dev_attr_fan4_input.dev_attr.attr, 425 &sensor_dev_attr_fan1_fault.dev_attr.attr, 426 &sensor_dev_attr_fan2_fault.dev_attr.attr, 427 &sensor_dev_attr_fan3_fault.dev_attr.attr, 428 &sensor_dev_attr_fan4_fault.dev_attr.attr, 429 &sensor_dev_attr_fan1_min.dev_attr.attr, 430 &sensor_dev_attr_fan2_min.dev_attr.attr, 431 &sensor_dev_attr_fan3_min.dev_attr.attr, 432 &sensor_dev_attr_fan4_min.dev_attr.attr, 433 434 &sensor_dev_attr_in0_input.dev_attr.attr, 435 &sensor_dev_attr_in1_input.dev_attr.attr, 436 &sensor_dev_attr_in2_input.dev_attr.attr, 437 &sensor_dev_attr_in3_input.dev_attr.attr, 438 &sensor_dev_attr_in4_input.dev_attr.attr, 439 &sensor_dev_attr_in0_label.dev_attr.attr, 440 &sensor_dev_attr_in1_label.dev_attr.attr, 441 &sensor_dev_attr_in2_label.dev_attr.attr, 442 &sensor_dev_attr_in3_label.dev_attr.attr, 443 /* No in4_label as in4 is a generic input pin */ 444 445 NULL 446 }; 447 448 static const struct attribute_group sch5627_group = { 449 .attrs = sch5627_attributes, 450 }; 451 452 static int sch5627_remove(struct platform_device *pdev) 453 { 454 struct sch5627_data *data = platform_get_drvdata(pdev); 455 456 if (data->hwmon_dev) 457 hwmon_device_unregister(data->hwmon_dev); 458 459 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group); 460 platform_set_drvdata(pdev, NULL); 461 kfree(data); 462 463 return 0; 464 } 465 466 static int __devinit sch5627_probe(struct platform_device *pdev) 467 { 468 struct sch5627_data *data; 469 int err, build_code, build_id, hwmon_rev, val; 470 471 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL); 472 if (!data) 473 return -ENOMEM; 474 475 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; 476 mutex_init(&data->update_lock); 477 platform_set_drvdata(pdev, data); 478 479 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID); 480 if (val < 0) { 481 err = val; 482 goto error; 483 } 484 if (val != SCH5627_HWMON_ID) { 485 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon", 486 val, SCH5627_HWMON_ID); 487 err = -ENODEV; 488 goto error; 489 } 490 491 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID); 492 if (val < 0) { 493 err = val; 494 goto error; 495 } 496 if (val != SCH5627_COMPANY_ID) { 497 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company", 498 val, SCH5627_COMPANY_ID); 499 err = -ENODEV; 500 goto error; 501 } 502 503 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID); 504 if (val < 0) { 505 err = val; 506 goto error; 507 } 508 if (val != SCH5627_PRIMARY_ID) { 509 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary", 510 val, SCH5627_PRIMARY_ID); 511 err = -ENODEV; 512 goto error; 513 } 514 515 build_code = sch56xx_read_virtual_reg(data->addr, 516 SCH5627_REG_BUILD_CODE); 517 if (build_code < 0) { 518 err = build_code; 519 goto error; 520 } 521 522 build_id = sch56xx_read_virtual_reg16(data->addr, 523 SCH5627_REG_BUILD_ID); 524 if (build_id < 0) { 525 err = build_id; 526 goto error; 527 } 528 529 hwmon_rev = sch56xx_read_virtual_reg(data->addr, 530 SCH5627_REG_HWMON_REV); 531 if (hwmon_rev < 0) { 532 err = hwmon_rev; 533 goto error; 534 } 535 536 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL); 537 if (val < 0) { 538 err = val; 539 goto error; 540 } 541 data->control = val; 542 if (!(data->control & 0x01)) { 543 pr_err("hardware monitoring not enabled\n"); 544 err = -ENODEV; 545 goto error; 546 } 547 /* Trigger a Vbat voltage measurement, so that we get a valid reading 548 the first time we read Vbat */ 549 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, 550 data->control | 0x10); 551 data->last_battery = jiffies; 552 553 /* 554 * Read limits, we do this only once as reading a register on 555 * the sch5627 is quite expensive (and they don't change). 556 */ 557 err = sch5627_read_limits(data); 558 if (err) 559 goto error; 560 561 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr); 562 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", 563 build_code, build_id, hwmon_rev); 564 565 /* Register sysfs interface files */ 566 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group); 567 if (err) 568 goto error; 569 570 data->hwmon_dev = hwmon_device_register(&pdev->dev); 571 if (IS_ERR(data->hwmon_dev)) { 572 err = PTR_ERR(data->hwmon_dev); 573 data->hwmon_dev = NULL; 574 goto error; 575 } 576 577 return 0; 578 579 error: 580 sch5627_remove(pdev); 581 return err; 582 } 583 584 static struct platform_driver sch5627_driver = { 585 .driver = { 586 .owner = THIS_MODULE, 587 .name = DRVNAME, 588 }, 589 .probe = sch5627_probe, 590 .remove = sch5627_remove, 591 }; 592 593 static int __init sch5627_init(void) 594 { 595 return platform_driver_register(&sch5627_driver); 596 } 597 598 static void __exit sch5627_exit(void) 599 { 600 platform_driver_unregister(&sch5627_driver); 601 } 602 603 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver"); 604 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 605 MODULE_LICENSE("GPL"); 606 607 module_init(sch5627_init); 608 module_exit(sch5627_exit); 609