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Linux/drivers/hwmon/pc87360.c

  1 /*
  2  *  pc87360.c - Part of lm_sensors, Linux kernel modules
  3  *              for hardware monitoring
  4  *  Copyright (C) 2004, 2007 Jean Delvare <jdelvare@suse.de>
  5  *
  6  *  Copied from smsc47m1.c:
  7  *  Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
  8  *
  9  *  This program is free software; you can redistribute it and/or modify
 10  *  it under the terms of the GNU General Public License as published by
 11  *  the Free Software Foundation; either version 2 of the License, or
 12  *  (at your option) any later version.
 13  *
 14  *  This program is distributed in the hope that it will be useful,
 15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  *  GNU General Public License for more details.
 18  *
 19  *  You should have received a copy of the GNU General Public License
 20  *  along with this program; if not, write to the Free Software
 21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 22  *
 23  *  Supports the following chips:
 24  *
 25  *  Chip        #vin    #fan    #pwm    #temp   devid
 26  *  PC87360     -       2       2       -       0xE1
 27  *  PC87363     -       2       2       -       0xE8
 28  *  PC87364     -       3       3       -       0xE4
 29  *  PC87365     11      3       3       2       0xE5
 30  *  PC87366     11      3       3       3-4     0xE9
 31  *
 32  *  This driver assumes that no more than one chip is present, and one of
 33  *  the standard Super-I/O addresses is used (0x2E/0x2F or 0x4E/0x4F).
 34  */
 35 
 36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 37 
 38 #include <linux/module.h>
 39 #include <linux/init.h>
 40 #include <linux/slab.h>
 41 #include <linux/jiffies.h>
 42 #include <linux/platform_device.h>
 43 #include <linux/hwmon.h>
 44 #include <linux/hwmon-sysfs.h>
 45 #include <linux/hwmon-vid.h>
 46 #include <linux/err.h>
 47 #include <linux/mutex.h>
 48 #include <linux/acpi.h>
 49 #include <linux/io.h>
 50 
 51 static u8 devid;
 52 static struct platform_device *pdev;
 53 static unsigned short extra_isa[3];
 54 static u8 confreg[4];
 55 
 56 static int init = 1;
 57 module_param(init, int, 0);
 58 MODULE_PARM_DESC(init,
 59 "Chip initialization level:\n"
 60 " 0: None\n"
 61 "*1: Forcibly enable internal voltage and temperature channels, except in9\n"
 62 " 2: Forcibly enable all voltage and temperature channels, except in9\n"
 63 " 3: Forcibly enable all voltage and temperature channels, including in9");
 64 
 65 static unsigned short force_id;
 66 module_param(force_id, ushort, 0);
 67 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 68 
 69 /*
 70  * Super-I/O registers and operations
 71  */
 72 
 73 #define DEV     0x07    /* Register: Logical device select */
 74 #define DEVID   0x20    /* Register: Device ID */
 75 #define ACT     0x30    /* Register: Device activation */
 76 #define BASE    0x60    /* Register: Base address */
 77 
 78 #define FSCM    0x09    /* Logical device: fans */
 79 #define VLM     0x0d    /* Logical device: voltages */
 80 #define TMS     0x0e    /* Logical device: temperatures */
 81 #define LDNI_MAX 3
 82 static const u8 logdev[LDNI_MAX] = { FSCM, VLM, TMS };
 83 
 84 #define LD_FAN          0
 85 #define LD_IN           1
 86 #define LD_TEMP         2
 87 
 88 static inline void superio_outb(int sioaddr, int reg, int val)
 89 {
 90         outb(reg, sioaddr);
 91         outb(val, sioaddr + 1);
 92 }
 93 
 94 static inline int superio_inb(int sioaddr, int reg)
 95 {
 96         outb(reg, sioaddr);
 97         return inb(sioaddr + 1);
 98 }
 99 
100 static inline void superio_exit(int sioaddr)
101 {
102         outb(0x02, sioaddr);
103         outb(0x02, sioaddr + 1);
104 }
105 
106 /*
107  * Logical devices
108  */
109 
110 #define PC87360_EXTENT          0x10
111 #define PC87365_REG_BANK        0x09
112 #define NO_BANK                 0xff
113 
114 /*
115  * Fan registers and conversions
116  */
117 
118 /* nr has to be 0 or 1 (PC87360/87363) or 2 (PC87364/87365/87366) */
119 #define PC87360_REG_PRESCALE(nr)        (0x00 + 2 * (nr))
120 #define PC87360_REG_PWM(nr)             (0x01 + 2 * (nr))
121 #define PC87360_REG_FAN_MIN(nr)         (0x06 + 3 * (nr))
122 #define PC87360_REG_FAN(nr)             (0x07 + 3 * (nr))
123 #define PC87360_REG_FAN_STATUS(nr)      (0x08 + 3 * (nr))
124 
125 #define FAN_FROM_REG(val, div)          ((val) == 0 ? 0 : \
126                                          480000 / ((val) * (div)))
127 #define FAN_TO_REG(val, div)            ((val) <= 100 ? 0 : \
128                                          480000 / ((val) * (div)))
129 #define FAN_DIV_FROM_REG(val)           (1 << (((val) >> 5) & 0x03))
130 #define FAN_STATUS_FROM_REG(val)        ((val) & 0x07)
131 
132 #define FAN_CONFIG_MONITOR(val, nr)     (((val) >> (2 + (nr) * 3)) & 1)
133 #define FAN_CONFIG_CONTROL(val, nr)     (((val) >> (3 + (nr) * 3)) & 1)
134 #define FAN_CONFIG_INVERT(val, nr)      (((val) >> (4 + (nr) * 3)) & 1)
135 
136 #define PWM_FROM_REG(val, inv)          ((inv) ? 255 - (val) : (val))
137 static inline u8 PWM_TO_REG(int val, int inv)
138 {
139         if (inv)
140                 val = 255 - val;
141         if (val < 0)
142                 return 0;
143         if (val > 255)
144                 return 255;
145         return val;
146 }
147 
148 /*
149  * Voltage registers and conversions
150  */
151 
152 #define PC87365_REG_IN_CONVRATE         0x07
153 #define PC87365_REG_IN_CONFIG           0x08
154 #define PC87365_REG_IN                  0x0B
155 #define PC87365_REG_IN_MIN              0x0D
156 #define PC87365_REG_IN_MAX              0x0C
157 #define PC87365_REG_IN_STATUS           0x0A
158 #define PC87365_REG_IN_ALARMS1          0x00
159 #define PC87365_REG_IN_ALARMS2          0x01
160 #define PC87365_REG_VID                 0x06
161 
162 #define IN_FROM_REG(val, ref)           (((val) * (ref) + 128) / 256)
163 #define IN_TO_REG(val, ref)             ((val) < 0 ? 0 : \
164                                          (val) * 256 >= (ref) * 255 ? 255 : \
165                                          ((val) * 256 + (ref) / 2) / (ref))
166 
167 /*
168  * Temperature registers and conversions
169  */
170 
171 #define PC87365_REG_TEMP_CONFIG         0x08
172 #define PC87365_REG_TEMP                0x0B
173 #define PC87365_REG_TEMP_MIN            0x0D
174 #define PC87365_REG_TEMP_MAX            0x0C
175 #define PC87365_REG_TEMP_CRIT           0x0E
176 #define PC87365_REG_TEMP_STATUS         0x0A
177 #define PC87365_REG_TEMP_ALARMS         0x00
178 
179 #define TEMP_FROM_REG(val)              ((val) * 1000)
180 #define TEMP_TO_REG(val)                ((val) < -55000 ? -55 : \
181                                          (val) > 127000 ? 127 : \
182                                          (val) < 0 ? ((val) - 500) / 1000 : \
183                                          ((val) + 500) / 1000)
184 
185 /*
186  * Device data
187  */
188 
189 struct pc87360_data {
190         const char *name;
191         struct device *hwmon_dev;
192         struct mutex lock;
193         struct mutex update_lock;
194         char valid;             /* !=0 if following fields are valid */
195         unsigned long last_updated;     /* In jiffies */
196 
197         int address[3];
198 
199         u8 fannr, innr, tempnr;
200 
201         u8 fan[3];              /* Register value */
202         u8 fan_min[3];          /* Register value */
203         u8 fan_status[3];       /* Register value */
204         u8 pwm[3];              /* Register value */
205         u16 fan_conf;           /* Configuration register values, combined */
206 
207         u16 in_vref;            /* 1 mV/bit */
208         u8 in[14];              /* Register value */
209         u8 in_min[14];          /* Register value */
210         u8 in_max[14];          /* Register value */
211         u8 in_crit[3];          /* Register value */
212         u8 in_status[14];       /* Register value */
213         u16 in_alarms;          /* Register values, combined, masked */
214         u8 vid_conf;            /* Configuration register value */
215         u8 vrm;
216         u8 vid;                 /* Register value */
217 
218         s8 temp[3];             /* Register value */
219         s8 temp_min[3];         /* Register value */
220         s8 temp_max[3];         /* Register value */
221         s8 temp_crit[3];        /* Register value */
222         u8 temp_status[3];      /* Register value */
223         u8 temp_alarms;         /* Register value, masked */
224 };
225 
226 /*
227  * Functions declaration
228  */
229 
230 static int pc87360_probe(struct platform_device *pdev);
231 static int pc87360_remove(struct platform_device *pdev);
232 
233 static int pc87360_read_value(struct pc87360_data *data, u8 ldi, u8 bank,
234                               u8 reg);
235 static void pc87360_write_value(struct pc87360_data *data, u8 ldi, u8 bank,
236                                 u8 reg, u8 value);
237 static void pc87360_init_device(struct platform_device *pdev,
238                                 int use_thermistors);
239 static struct pc87360_data *pc87360_update_device(struct device *dev);
240 
241 /*
242  * Driver data
243  */
244 
245 static struct platform_driver pc87360_driver = {
246         .driver = {
247                 .owner  = THIS_MODULE,
248                 .name   = "pc87360",
249         },
250         .probe          = pc87360_probe,
251         .remove         = pc87360_remove,
252 };
253 
254 /*
255  * Sysfs stuff
256  */
257 
258 static ssize_t show_fan_input(struct device *dev,
259                               struct device_attribute *devattr, char *buf)
260 {
261         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
262         struct pc87360_data *data = pc87360_update_device(dev);
263         return sprintf(buf, "%u\n", FAN_FROM_REG(data->fan[attr->index],
264                        FAN_DIV_FROM_REG(data->fan_status[attr->index])));
265 }
266 static ssize_t show_fan_min(struct device *dev,
267                             struct device_attribute *devattr, char *buf)
268 {
269         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
270         struct pc87360_data *data = pc87360_update_device(dev);
271         return sprintf(buf, "%u\n", FAN_FROM_REG(data->fan_min[attr->index],
272                        FAN_DIV_FROM_REG(data->fan_status[attr->index])));
273 }
274 static ssize_t show_fan_div(struct device *dev,
275                             struct device_attribute *devattr, char *buf)
276 {
277         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
278         struct pc87360_data *data = pc87360_update_device(dev);
279         return sprintf(buf, "%u\n",
280                        FAN_DIV_FROM_REG(data->fan_status[attr->index]));
281 }
282 static ssize_t show_fan_status(struct device *dev,
283                                struct device_attribute *devattr, char *buf)
284 {
285         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
286         struct pc87360_data *data = pc87360_update_device(dev);
287         return sprintf(buf, "%u\n",
288                        FAN_STATUS_FROM_REG(data->fan_status[attr->index]));
289 }
290 static ssize_t set_fan_min(struct device *dev,
291                            struct device_attribute *devattr, const char *buf,
292         size_t count)
293 {
294         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
295         struct pc87360_data *data = dev_get_drvdata(dev);
296         long fan_min;
297         int err;
298 
299         err = kstrtol(buf, 10, &fan_min);
300         if (err)
301                 return err;
302 
303         mutex_lock(&data->update_lock);
304         fan_min = FAN_TO_REG(fan_min,
305                              FAN_DIV_FROM_REG(data->fan_status[attr->index]));
306 
307         /* If it wouldn't fit, change clock divisor */
308         while (fan_min > 255
309             && (data->fan_status[attr->index] & 0x60) != 0x60) {
310                 fan_min >>= 1;
311                 data->fan[attr->index] >>= 1;
312                 data->fan_status[attr->index] += 0x20;
313         }
314         data->fan_min[attr->index] = fan_min > 255 ? 255 : fan_min;
315         pc87360_write_value(data, LD_FAN, NO_BANK,
316                             PC87360_REG_FAN_MIN(attr->index),
317                             data->fan_min[attr->index]);
318 
319         /* Write new divider, preserve alarm bits */
320         pc87360_write_value(data, LD_FAN, NO_BANK,
321                             PC87360_REG_FAN_STATUS(attr->index),
322                             data->fan_status[attr->index] & 0xF9);
323         mutex_unlock(&data->update_lock);
324 
325         return count;
326 }
327 
328 static struct sensor_device_attribute fan_input[] = {
329         SENSOR_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0),
330         SENSOR_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1),
331         SENSOR_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2),
332 };
333 static struct sensor_device_attribute fan_status[] = {
334         SENSOR_ATTR(fan1_status, S_IRUGO, show_fan_status, NULL, 0),
335         SENSOR_ATTR(fan2_status, S_IRUGO, show_fan_status, NULL, 1),
336         SENSOR_ATTR(fan3_status, S_IRUGO, show_fan_status, NULL, 2),
337 };
338 static struct sensor_device_attribute fan_div[] = {
339         SENSOR_ATTR(fan1_div, S_IRUGO, show_fan_div, NULL, 0),
340         SENSOR_ATTR(fan2_div, S_IRUGO, show_fan_div, NULL, 1),
341         SENSOR_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2),
342 };
343 static struct sensor_device_attribute fan_min[] = {
344         SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 0),
345         SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 1),
346         SENSOR_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 2),
347 };
348 
349 #define FAN_UNIT_ATTRS(X)               \
350 {       &fan_input[X].dev_attr.attr,    \
351         &fan_status[X].dev_attr.attr,   \
352         &fan_div[X].dev_attr.attr,      \
353         &fan_min[X].dev_attr.attr,      \
354         NULL                            \
355 }
356 
357 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
358                         char *buf)
359 {
360         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
361         struct pc87360_data *data = pc87360_update_device(dev);
362         return sprintf(buf, "%u\n",
363                        PWM_FROM_REG(data->pwm[attr->index],
364                                     FAN_CONFIG_INVERT(data->fan_conf,
365                                                       attr->index)));
366 }
367 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
368                        const char *buf, size_t count)
369 {
370         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371         struct pc87360_data *data = dev_get_drvdata(dev);
372         long val;
373         int err;
374 
375         err = kstrtol(buf, 10, &val);
376         if (err)
377                 return err;
378 
379         mutex_lock(&data->update_lock);
380         data->pwm[attr->index] = PWM_TO_REG(val,
381                               FAN_CONFIG_INVERT(data->fan_conf, attr->index));
382         pc87360_write_value(data, LD_FAN, NO_BANK, PC87360_REG_PWM(attr->index),
383                             data->pwm[attr->index]);
384         mutex_unlock(&data->update_lock);
385         return count;
386 }
387 
388 static struct sensor_device_attribute pwm[] = {
389         SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0),
390         SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1),
391         SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2),
392 };
393 
394 static struct attribute *pc8736x_fan_attr[][5] = {
395         FAN_UNIT_ATTRS(0),
396         FAN_UNIT_ATTRS(1),
397         FAN_UNIT_ATTRS(2)
398 };
399 
400 static const struct attribute_group pc8736x_fan_attr_group[] = {
401         { .attrs = pc8736x_fan_attr[0], },
402         { .attrs = pc8736x_fan_attr[1], },
403         { .attrs = pc8736x_fan_attr[2], },
404 };
405 
406 static ssize_t show_in_input(struct device *dev,
407                              struct device_attribute *devattr, char *buf)
408 {
409         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
410         struct pc87360_data *data = pc87360_update_device(dev);
411         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[attr->index],
412                        data->in_vref));
413 }
414 static ssize_t show_in_min(struct device *dev,
415                            struct device_attribute *devattr, char *buf)
416 {
417         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
418         struct pc87360_data *data = pc87360_update_device(dev);
419         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[attr->index],
420                        data->in_vref));
421 }
422 static ssize_t show_in_max(struct device *dev,
423                            struct device_attribute *devattr, char *buf)
424 {
425         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
426         struct pc87360_data *data = pc87360_update_device(dev);
427         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[attr->index],
428                        data->in_vref));
429 }
430 static ssize_t show_in_status(struct device *dev,
431                               struct device_attribute *devattr, char *buf)
432 {
433         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
434         struct pc87360_data *data = pc87360_update_device(dev);
435         return sprintf(buf, "%u\n", data->in_status[attr->index]);
436 }
437 static ssize_t set_in_min(struct device *dev, struct device_attribute *devattr,
438                           const char *buf, size_t count)
439 {
440         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
441         struct pc87360_data *data = dev_get_drvdata(dev);
442         long val;
443         int err;
444 
445         err = kstrtol(buf, 10, &val);
446         if (err)
447                 return err;
448 
449         mutex_lock(&data->update_lock);
450         data->in_min[attr->index] = IN_TO_REG(val, data->in_vref);
451         pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_IN_MIN,
452                             data->in_min[attr->index]);
453         mutex_unlock(&data->update_lock);
454         return count;
455 }
456 static ssize_t set_in_max(struct device *dev, struct device_attribute *devattr,
457                           const char *buf, size_t count)
458 {
459         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
460         struct pc87360_data *data = dev_get_drvdata(dev);
461         long val;
462         int err;
463 
464         err = kstrtol(buf, 10, &val);
465         if (err)
466                 return err;
467 
468         mutex_lock(&data->update_lock);
469         data->in_max[attr->index] = IN_TO_REG(val,
470                                data->in_vref);
471         pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_IN_MAX,
472                             data->in_max[attr->index]);
473         mutex_unlock(&data->update_lock);
474         return count;
475 }
476 
477 static struct sensor_device_attribute in_input[] = {
478         SENSOR_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0),
479         SENSOR_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1),
480         SENSOR_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2),
481         SENSOR_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3),
482         SENSOR_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4),
483         SENSOR_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5),
484         SENSOR_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6),
485         SENSOR_ATTR(in7_input, S_IRUGO, show_in_input, NULL, 7),
486         SENSOR_ATTR(in8_input, S_IRUGO, show_in_input, NULL, 8),
487         SENSOR_ATTR(in9_input, S_IRUGO, show_in_input, NULL, 9),
488         SENSOR_ATTR(in10_input, S_IRUGO, show_in_input, NULL, 10),
489 };
490 static struct sensor_device_attribute in_status[] = {
491         SENSOR_ATTR(in0_status, S_IRUGO, show_in_status, NULL, 0),
492         SENSOR_ATTR(in1_status, S_IRUGO, show_in_status, NULL, 1),
493         SENSOR_ATTR(in2_status, S_IRUGO, show_in_status, NULL, 2),
494         SENSOR_ATTR(in3_status, S_IRUGO, show_in_status, NULL, 3),
495         SENSOR_ATTR(in4_status, S_IRUGO, show_in_status, NULL, 4),
496         SENSOR_ATTR(in5_status, S_IRUGO, show_in_status, NULL, 5),
497         SENSOR_ATTR(in6_status, S_IRUGO, show_in_status, NULL, 6),
498         SENSOR_ATTR(in7_status, S_IRUGO, show_in_status, NULL, 7),
499         SENSOR_ATTR(in8_status, S_IRUGO, show_in_status, NULL, 8),
500         SENSOR_ATTR(in9_status, S_IRUGO, show_in_status, NULL, 9),
501         SENSOR_ATTR(in10_status, S_IRUGO, show_in_status, NULL, 10),
502 };
503 static struct sensor_device_attribute in_min[] = {
504         SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 0),
505         SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 1),
506         SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 2),
507         SENSOR_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 3),
508         SENSOR_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 4),
509         SENSOR_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 5),
510         SENSOR_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 6),
511         SENSOR_ATTR(in7_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 7),
512         SENSOR_ATTR(in8_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 8),
513         SENSOR_ATTR(in9_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 9),
514         SENSOR_ATTR(in10_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 10),
515 };
516 static struct sensor_device_attribute in_max[] = {
517         SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 0),
518         SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 1),
519         SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 2),
520         SENSOR_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 3),
521         SENSOR_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 4),
522         SENSOR_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 5),
523         SENSOR_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 6),
524         SENSOR_ATTR(in7_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 7),
525         SENSOR_ATTR(in8_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 8),
526         SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 9),
527         SENSOR_ATTR(in10_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 10),
528 };
529 
530 /* (temp & vin) channel status register alarm bits (pdf sec.11.5.12) */
531 #define CHAN_ALM_MIN    0x02    /* min limit crossed */
532 #define CHAN_ALM_MAX    0x04    /* max limit exceeded */
533 #define TEMP_ALM_CRIT   0x08    /* temp crit exceeded (temp only) */
534 
535 /*
536  * show_in_min/max_alarm() reads data from the per-channel status
537  * register (sec 11.5.12), not the vin event status registers (sec
538  * 11.5.2) that (legacy) show_in_alarm() resds (via data->in_alarms)
539  */
540 
541 static ssize_t show_in_min_alarm(struct device *dev,
542                         struct device_attribute *devattr, char *buf)
543 {
544         struct pc87360_data *data = pc87360_update_device(dev);
545         unsigned nr = to_sensor_dev_attr(devattr)->index;
546 
547         return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MIN));
548 }
549 static ssize_t show_in_max_alarm(struct device *dev,
550                         struct device_attribute *devattr, char *buf)
551 {
552         struct pc87360_data *data = pc87360_update_device(dev);
553         unsigned nr = to_sensor_dev_attr(devattr)->index;
554 
555         return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MAX));
556 }
557 
558 static struct sensor_device_attribute in_min_alarm[] = {
559         SENSOR_ATTR(in0_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 0),
560         SENSOR_ATTR(in1_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 1),
561         SENSOR_ATTR(in2_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 2),
562         SENSOR_ATTR(in3_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 3),
563         SENSOR_ATTR(in4_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 4),
564         SENSOR_ATTR(in5_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 5),
565         SENSOR_ATTR(in6_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 6),
566         SENSOR_ATTR(in7_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 7),
567         SENSOR_ATTR(in8_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 8),
568         SENSOR_ATTR(in9_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 9),
569         SENSOR_ATTR(in10_min_alarm, S_IRUGO, show_in_min_alarm, NULL, 10),
570 };
571 static struct sensor_device_attribute in_max_alarm[] = {
572         SENSOR_ATTR(in0_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 0),
573         SENSOR_ATTR(in1_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 1),
574         SENSOR_ATTR(in2_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 2),
575         SENSOR_ATTR(in3_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 3),
576         SENSOR_ATTR(in4_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 4),
577         SENSOR_ATTR(in5_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 5),
578         SENSOR_ATTR(in6_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 6),
579         SENSOR_ATTR(in7_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 7),
580         SENSOR_ATTR(in8_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 8),
581         SENSOR_ATTR(in9_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 9),
582         SENSOR_ATTR(in10_max_alarm, S_IRUGO, show_in_max_alarm, NULL, 10),
583 };
584 
585 #define VIN_UNIT_ATTRS(X) \
586         &in_input[X].dev_attr.attr,     \
587         &in_status[X].dev_attr.attr,    \
588         &in_min[X].dev_attr.attr,       \
589         &in_max[X].dev_attr.attr,       \
590         &in_min_alarm[X].dev_attr.attr, \
591         &in_max_alarm[X].dev_attr.attr
592 
593 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
594                         char *buf)
595 {
596         struct pc87360_data *data = pc87360_update_device(dev);
597         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
598 }
599 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
600 
601 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
602                         char *buf)
603 {
604         struct pc87360_data *data = dev_get_drvdata(dev);
605         return sprintf(buf, "%u\n", data->vrm);
606 }
607 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
608                        const char *buf, size_t count)
609 {
610         struct pc87360_data *data = dev_get_drvdata(dev);
611         unsigned long val;
612         int err;
613 
614         err = kstrtoul(buf, 10, &val);
615         if (err)
616                 return err;
617 
618         if (val > 255)
619                 return -EINVAL;
620 
621         data->vrm = val;
622         return count;
623 }
624 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
625 
626 static ssize_t show_in_alarms(struct device *dev,
627                               struct device_attribute *attr, char *buf)
628 {
629         struct pc87360_data *data = pc87360_update_device(dev);
630         return sprintf(buf, "%u\n", data->in_alarms);
631 }
632 static DEVICE_ATTR(alarms_in, S_IRUGO, show_in_alarms, NULL);
633 
634 static struct attribute *pc8736x_vin_attr_array[] = {
635         VIN_UNIT_ATTRS(0),
636         VIN_UNIT_ATTRS(1),
637         VIN_UNIT_ATTRS(2),
638         VIN_UNIT_ATTRS(3),
639         VIN_UNIT_ATTRS(4),
640         VIN_UNIT_ATTRS(5),
641         VIN_UNIT_ATTRS(6),
642         VIN_UNIT_ATTRS(7),
643         VIN_UNIT_ATTRS(8),
644         VIN_UNIT_ATTRS(9),
645         VIN_UNIT_ATTRS(10),
646         &dev_attr_cpu0_vid.attr,
647         &dev_attr_vrm.attr,
648         &dev_attr_alarms_in.attr,
649         NULL
650 };
651 static const struct attribute_group pc8736x_vin_group = {
652         .attrs = pc8736x_vin_attr_array,
653 };
654 
655 static ssize_t show_therm_input(struct device *dev,
656                                 struct device_attribute *devattr, char *buf)
657 {
658         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
659         struct pc87360_data *data = pc87360_update_device(dev);
660         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[attr->index],
661                        data->in_vref));
662 }
663 static ssize_t show_therm_min(struct device *dev,
664                               struct device_attribute *devattr, char *buf)
665 {
666         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
667         struct pc87360_data *data = pc87360_update_device(dev);
668         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[attr->index],
669                        data->in_vref));
670 }
671 static ssize_t show_therm_max(struct device *dev,
672                               struct device_attribute *devattr, char *buf)
673 {
674         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
675         struct pc87360_data *data = pc87360_update_device(dev);
676         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[attr->index],
677                        data->in_vref));
678 }
679 static ssize_t show_therm_crit(struct device *dev,
680                                struct device_attribute *devattr, char *buf)
681 {
682         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
683         struct pc87360_data *data = pc87360_update_device(dev);
684         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_crit[attr->index-11],
685                        data->in_vref));
686 }
687 static ssize_t show_therm_status(struct device *dev,
688                                  struct device_attribute *devattr, char *buf)
689 {
690         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
691         struct pc87360_data *data = pc87360_update_device(dev);
692         return sprintf(buf, "%u\n", data->in_status[attr->index]);
693 }
694 
695 static ssize_t set_therm_min(struct device *dev,
696                              struct device_attribute *devattr,
697                              const char *buf, size_t count)
698 {
699         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
700         struct pc87360_data *data = dev_get_drvdata(dev);
701         long val;
702         int err;
703 
704         err = kstrtol(buf, 10, &val);
705         if (err)
706                 return err;
707 
708         mutex_lock(&data->update_lock);
709         data->in_min[attr->index] = IN_TO_REG(val, data->in_vref);
710         pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_MIN,
711                             data->in_min[attr->index]);
712         mutex_unlock(&data->update_lock);
713         return count;
714 }
715 
716 static ssize_t set_therm_max(struct device *dev,
717                              struct device_attribute *devattr,
718                              const char *buf, size_t count)
719 {
720         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
721         struct pc87360_data *data = dev_get_drvdata(dev);
722         long val;
723         int err;
724 
725         err = kstrtol(buf, 10, &val);
726         if (err)
727                 return err;
728 
729         mutex_lock(&data->update_lock);
730         data->in_max[attr->index] = IN_TO_REG(val, data->in_vref);
731         pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_MAX,
732                             data->in_max[attr->index]);
733         mutex_unlock(&data->update_lock);
734         return count;
735 }
736 static ssize_t set_therm_crit(struct device *dev,
737                               struct device_attribute *devattr,
738                               const char *buf, size_t count)
739 {
740         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
741         struct pc87360_data *data = dev_get_drvdata(dev);
742         long val;
743         int err;
744 
745         err = kstrtol(buf, 10, &val);
746         if (err)
747                 return err;
748 
749         mutex_lock(&data->update_lock);
750         data->in_crit[attr->index-11] = IN_TO_REG(val, data->in_vref);
751         pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_CRIT,
752                             data->in_crit[attr->index-11]);
753         mutex_unlock(&data->update_lock);
754         return count;
755 }
756 
757 /*
758  * the +11 term below reflects the fact that VLM units 11,12,13 are
759  * used in the chip to measure voltage across the thermistors
760  */
761 static struct sensor_device_attribute therm_input[] = {
762         SENSOR_ATTR(temp4_input, S_IRUGO, show_therm_input, NULL, 0 + 11),
763         SENSOR_ATTR(temp5_input, S_IRUGO, show_therm_input, NULL, 1 + 11),
764         SENSOR_ATTR(temp6_input, S_IRUGO, show_therm_input, NULL, 2 + 11),
765 };
766 static struct sensor_device_attribute therm_status[] = {
767         SENSOR_ATTR(temp4_status, S_IRUGO, show_therm_status, NULL, 0 + 11),
768         SENSOR_ATTR(temp5_status, S_IRUGO, show_therm_status, NULL, 1 + 11),
769         SENSOR_ATTR(temp6_status, S_IRUGO, show_therm_status, NULL, 2 + 11),
770 };
771 static struct sensor_device_attribute therm_min[] = {
772         SENSOR_ATTR(temp4_min, S_IRUGO | S_IWUSR,
773                     show_therm_min, set_therm_min, 0 + 11),
774         SENSOR_ATTR(temp5_min, S_IRUGO | S_IWUSR,
775                     show_therm_min, set_therm_min, 1 + 11),
776         SENSOR_ATTR(temp6_min, S_IRUGO | S_IWUSR,
777                     show_therm_min, set_therm_min, 2 + 11),
778 };
779 static struct sensor_device_attribute therm_max[] = {
780         SENSOR_ATTR(temp4_max, S_IRUGO | S_IWUSR,
781                     show_therm_max, set_therm_max, 0 + 11),
782         SENSOR_ATTR(temp5_max, S_IRUGO | S_IWUSR,
783                     show_therm_max, set_therm_max, 1 + 11),
784         SENSOR_ATTR(temp6_max, S_IRUGO | S_IWUSR,
785                     show_therm_max, set_therm_max, 2 + 11),
786 };
787 static struct sensor_device_attribute therm_crit[] = {
788         SENSOR_ATTR(temp4_crit, S_IRUGO | S_IWUSR,
789                     show_therm_crit, set_therm_crit, 0 + 11),
790         SENSOR_ATTR(temp5_crit, S_IRUGO | S_IWUSR,
791                     show_therm_crit, set_therm_crit, 1 + 11),
792         SENSOR_ATTR(temp6_crit, S_IRUGO | S_IWUSR,
793                     show_therm_crit, set_therm_crit, 2 + 11),
794 };
795 
796 /*
797  * show_therm_min/max_alarm() reads data from the per-channel voltage
798  * status register (sec 11.5.12)
799  */
800 
801 static ssize_t show_therm_min_alarm(struct device *dev,
802                                 struct device_attribute *devattr, char *buf)
803 {
804         struct pc87360_data *data = pc87360_update_device(dev);
805         unsigned nr = to_sensor_dev_attr(devattr)->index;
806 
807         return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MIN));
808 }
809 static ssize_t show_therm_max_alarm(struct device *dev,
810                                 struct device_attribute *devattr, char *buf)
811 {
812         struct pc87360_data *data = pc87360_update_device(dev);
813         unsigned nr = to_sensor_dev_attr(devattr)->index;
814 
815         return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MAX));
816 }
817 static ssize_t show_therm_crit_alarm(struct device *dev,
818                                 struct device_attribute *devattr, char *buf)
819 {
820         struct pc87360_data *data = pc87360_update_device(dev);
821         unsigned nr = to_sensor_dev_attr(devattr)->index;
822 
823         return sprintf(buf, "%u\n", !!(data->in_status[nr] & TEMP_ALM_CRIT));
824 }
825 
826 static struct sensor_device_attribute therm_min_alarm[] = {
827         SENSOR_ATTR(temp4_min_alarm, S_IRUGO,
828                     show_therm_min_alarm, NULL, 0 + 11),
829         SENSOR_ATTR(temp5_min_alarm, S_IRUGO,
830                     show_therm_min_alarm, NULL, 1 + 11),
831         SENSOR_ATTR(temp6_min_alarm, S_IRUGO,
832                     show_therm_min_alarm, NULL, 2 + 11),
833 };
834 static struct sensor_device_attribute therm_max_alarm[] = {
835         SENSOR_ATTR(temp4_max_alarm, S_IRUGO,
836                     show_therm_max_alarm, NULL, 0 + 11),
837         SENSOR_ATTR(temp5_max_alarm, S_IRUGO,
838                     show_therm_max_alarm, NULL, 1 + 11),
839         SENSOR_ATTR(temp6_max_alarm, S_IRUGO,
840                     show_therm_max_alarm, NULL, 2 + 11),
841 };
842 static struct sensor_device_attribute therm_crit_alarm[] = {
843         SENSOR_ATTR(temp4_crit_alarm, S_IRUGO,
844                     show_therm_crit_alarm, NULL, 0 + 11),
845         SENSOR_ATTR(temp5_crit_alarm, S_IRUGO,
846                     show_therm_crit_alarm, NULL, 1 + 11),
847         SENSOR_ATTR(temp6_crit_alarm, S_IRUGO,
848                     show_therm_crit_alarm, NULL, 2 + 11),
849 };
850 
851 #define THERM_UNIT_ATTRS(X) \
852         &therm_input[X].dev_attr.attr,  \
853         &therm_status[X].dev_attr.attr, \
854         &therm_min[X].dev_attr.attr,    \
855         &therm_max[X].dev_attr.attr,    \
856         &therm_crit[X].dev_attr.attr,   \
857         &therm_min_alarm[X].dev_attr.attr, \
858         &therm_max_alarm[X].dev_attr.attr, \
859         &therm_crit_alarm[X].dev_attr.attr
860 
861 static struct attribute *pc8736x_therm_attr_array[] = {
862         THERM_UNIT_ATTRS(0),
863         THERM_UNIT_ATTRS(1),
864         THERM_UNIT_ATTRS(2),
865         NULL
866 };
867 static const struct attribute_group pc8736x_therm_group = {
868         .attrs = pc8736x_therm_attr_array,
869 };
870 
871 static ssize_t show_temp_input(struct device *dev,
872                                struct device_attribute *devattr, char *buf)
873 {
874         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
875         struct pc87360_data *data = pc87360_update_device(dev);
876         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
877 }
878 
879 static ssize_t show_temp_min(struct device *dev,
880                              struct device_attribute *devattr, char *buf)
881 {
882         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
883         struct pc87360_data *data = pc87360_update_device(dev);
884         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[attr->index]));
885 }
886 
887 static ssize_t show_temp_max(struct device *dev,
888                              struct device_attribute *devattr, char *buf)
889 {
890         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
891         struct pc87360_data *data = pc87360_update_device(dev);
892         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[attr->index]));
893 }
894 
895 static ssize_t show_temp_crit(struct device *dev,
896                               struct device_attribute *devattr, char *buf)
897 {
898         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
899         struct pc87360_data *data = pc87360_update_device(dev);
900         return sprintf(buf, "%d\n",
901                        TEMP_FROM_REG(data->temp_crit[attr->index]));
902 }
903 
904 static ssize_t show_temp_status(struct device *dev,
905                                 struct device_attribute *devattr, char *buf)
906 {
907         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
908         struct pc87360_data *data = pc87360_update_device(dev);
909         return sprintf(buf, "%d\n", data->temp_status[attr->index]);
910 }
911 
912 static ssize_t set_temp_min(struct device *dev,
913                             struct device_attribute *devattr,
914                             const char *buf, size_t count)
915 {
916         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
917         struct pc87360_data *data = dev_get_drvdata(dev);
918         long val;
919         int err;
920 
921         err = kstrtol(buf, 10, &val);
922         if (err)
923                 return err;
924 
925         mutex_lock(&data->update_lock);
926         data->temp_min[attr->index] = TEMP_TO_REG(val);
927         pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_MIN,
928                             data->temp_min[attr->index]);
929         mutex_unlock(&data->update_lock);
930         return count;
931 }
932 
933 static ssize_t set_temp_max(struct device *dev,
934                             struct device_attribute *devattr,
935                             const char *buf, size_t count)
936 {
937         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
938         struct pc87360_data *data = dev_get_drvdata(dev);
939         long val;
940         int err;
941 
942         err = kstrtol(buf, 10, &val);
943         if (err)
944                 return err;
945 
946         mutex_lock(&data->update_lock);
947         data->temp_max[attr->index] = TEMP_TO_REG(val);
948         pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_MAX,
949                             data->temp_max[attr->index]);
950         mutex_unlock(&data->update_lock);
951         return count;
952 }
953 
954 static ssize_t set_temp_crit(struct device *dev,
955                              struct device_attribute *devattr, const char *buf,
956                              size_t count)
957 {
958         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
959         struct pc87360_data *data = dev_get_drvdata(dev);
960         long val;
961         int err;
962 
963         err = kstrtol(buf, 10, &val);
964         if (err)
965                 return err;
966 
967         mutex_lock(&data->update_lock);
968         data->temp_crit[attr->index] = TEMP_TO_REG(val);
969         pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_CRIT,
970                             data->temp_crit[attr->index]);
971         mutex_unlock(&data->update_lock);
972         return count;
973 }
974 
975 static struct sensor_device_attribute temp_input[] = {
976         SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0),
977         SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1),
978         SENSOR_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2),
979 };
980 static struct sensor_device_attribute temp_status[] = {
981         SENSOR_ATTR(temp1_status, S_IRUGO, show_temp_status, NULL, 0),
982         SENSOR_ATTR(temp2_status, S_IRUGO, show_temp_status, NULL, 1),
983         SENSOR_ATTR(temp3_status, S_IRUGO, show_temp_status, NULL, 2),
984 };
985 static struct sensor_device_attribute temp_min[] = {
986         SENSOR_ATTR(temp1_min, S_IRUGO | S_IWUSR,
987                     show_temp_min, set_temp_min, 0),
988         SENSOR_ATTR(temp2_min, S_IRUGO | S_IWUSR,
989                     show_temp_min, set_temp_min, 1),
990         SENSOR_ATTR(temp3_min, S_IRUGO | S_IWUSR,
991                     show_temp_min, set_temp_min, 2),
992 };
993 static struct sensor_device_attribute temp_max[] = {
994         SENSOR_ATTR(temp1_max, S_IRUGO | S_IWUSR,
995                     show_temp_max, set_temp_max, 0),
996         SENSOR_ATTR(temp2_max, S_IRUGO | S_IWUSR,
997                     show_temp_max, set_temp_max, 1),
998         SENSOR_ATTR(temp3_max, S_IRUGO | S_IWUSR,
999                     show_temp_max, set_temp_max, 2),
1000 };
1001 static struct sensor_device_attribute temp_crit[] = {
1002         SENSOR_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
1003                     show_temp_crit, set_temp_crit, 0),
1004         SENSOR_ATTR(temp2_crit, S_IRUGO | S_IWUSR,
1005                     show_temp_crit, set_temp_crit, 1),
1006         SENSOR_ATTR(temp3_crit, S_IRUGO | S_IWUSR,
1007                     show_temp_crit, set_temp_crit, 2),
1008 };
1009 
1010 static ssize_t show_temp_alarms(struct device *dev,
1011                                 struct device_attribute *attr, char *buf)
1012 {
1013         struct pc87360_data *data = pc87360_update_device(dev);
1014         return sprintf(buf, "%u\n", data->temp_alarms);
1015 }
1016 
1017 static DEVICE_ATTR(alarms_temp, S_IRUGO, show_temp_alarms, NULL);
1018 
1019 /*
1020  * show_temp_min/max_alarm() reads data from the per-channel status
1021  * register (sec 12.3.7), not the temp event status registers (sec
1022  * 12.3.2) that show_temp_alarm() reads (via data->temp_alarms)
1023  */
1024 
1025 static ssize_t show_temp_min_alarm(struct device *dev,
1026                         struct device_attribute *devattr, char *buf)
1027 {
1028         struct pc87360_data *data = pc87360_update_device(dev);
1029         unsigned nr = to_sensor_dev_attr(devattr)->index;
1030 
1031         return sprintf(buf, "%u\n", !!(data->temp_status[nr] & CHAN_ALM_MIN));
1032 }
1033 
1034 static ssize_t show_temp_max_alarm(struct device *dev,
1035                         struct device_attribute *devattr, char *buf)
1036 {
1037         struct pc87360_data *data = pc87360_update_device(dev);
1038         unsigned nr = to_sensor_dev_attr(devattr)->index;
1039 
1040         return sprintf(buf, "%u\n", !!(data->temp_status[nr] & CHAN_ALM_MAX));
1041 }
1042 
1043 static ssize_t show_temp_crit_alarm(struct device *dev,
1044                         struct device_attribute *devattr, char *buf)
1045 {
1046         struct pc87360_data *data = pc87360_update_device(dev);
1047         unsigned nr = to_sensor_dev_attr(devattr)->index;
1048 
1049         return sprintf(buf, "%u\n", !!(data->temp_status[nr] & TEMP_ALM_CRIT));
1050 }
1051 
1052 static struct sensor_device_attribute temp_min_alarm[] = {
1053         SENSOR_ATTR(temp1_min_alarm, S_IRUGO, show_temp_min_alarm, NULL, 0),
1054         SENSOR_ATTR(temp2_min_alarm, S_IRUGO, show_temp_min_alarm, NULL, 1),
1055         SENSOR_ATTR(temp3_min_alarm, S_IRUGO, show_temp_min_alarm, NULL, 2),
1056 };
1057 
1058 static struct sensor_device_attribute temp_max_alarm[] = {
1059         SENSOR_ATTR(temp1_max_alarm, S_IRUGO, show_temp_max_alarm, NULL, 0),
1060         SENSOR_ATTR(temp2_max_alarm, S_IRUGO, show_temp_max_alarm, NULL, 1),
1061         SENSOR_ATTR(temp3_max_alarm, S_IRUGO, show_temp_max_alarm, NULL, 2),
1062 };
1063 
1064 static struct sensor_device_attribute temp_crit_alarm[] = {
1065         SENSOR_ATTR(temp1_crit_alarm, S_IRUGO, show_temp_crit_alarm, NULL, 0),
1066         SENSOR_ATTR(temp2_crit_alarm, S_IRUGO, show_temp_crit_alarm, NULL, 1),
1067         SENSOR_ATTR(temp3_crit_alarm, S_IRUGO, show_temp_crit_alarm, NULL, 2),
1068 };
1069 
1070 #define TEMP_FAULT      0x40    /* open diode */
1071 static ssize_t show_temp_fault(struct device *dev,
1072                         struct device_attribute *devattr, char *buf)
1073 {
1074         struct pc87360_data *data = pc87360_update_device(dev);
1075         unsigned nr = to_sensor_dev_attr(devattr)->index;
1076 
1077         return sprintf(buf, "%u\n", !!(data->temp_status[nr] & TEMP_FAULT));
1078 }
1079 static struct sensor_device_attribute temp_fault[] = {
1080         SENSOR_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0),
1081         SENSOR_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1),
1082         SENSOR_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2),
1083 };
1084 
1085 #define TEMP_UNIT_ATTRS(X)                      \
1086 {       &temp_input[X].dev_attr.attr,           \
1087         &temp_status[X].dev_attr.attr,          \
1088         &temp_min[X].dev_attr.attr,             \
1089         &temp_max[X].dev_attr.attr,             \
1090         &temp_crit[X].dev_attr.attr,            \
1091         &temp_min_alarm[X].dev_attr.attr,       \
1092         &temp_max_alarm[X].dev_attr.attr,       \
1093         &temp_crit_alarm[X].dev_attr.attr,      \
1094         &temp_fault[X].dev_attr.attr,           \
1095         NULL                                    \
1096 }
1097 
1098 static struct attribute *pc8736x_temp_attr[][10] = {
1099         TEMP_UNIT_ATTRS(0),
1100         TEMP_UNIT_ATTRS(1),
1101         TEMP_UNIT_ATTRS(2)
1102 };
1103 
1104 static const struct attribute_group pc8736x_temp_attr_group[] = {
1105         { .attrs = pc8736x_temp_attr[0] },
1106         { .attrs = pc8736x_temp_attr[1] },
1107         { .attrs = pc8736x_temp_attr[2] }
1108 };
1109 
1110 static ssize_t show_name(struct device *dev,
1111                         struct device_attribute *devattr, char *buf)
1112 {
1113         struct pc87360_data *data = dev_get_drvdata(dev);
1114         return sprintf(buf, "%s\n", data->name);
1115 }
1116 
1117 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1118 
1119 /*
1120  * Device detection, registration and update
1121  */
1122 
1123 static int __init pc87360_find(int sioaddr, u8 *devid,
1124                                unsigned short *addresses)
1125 {
1126         u16 val;
1127         int i;
1128         int nrdev; /* logical device count */
1129 
1130         /* No superio_enter */
1131 
1132         /* Identify device */
1133         val = force_id ? force_id : superio_inb(sioaddr, DEVID);
1134         switch (val) {
1135         case 0xE1: /* PC87360 */
1136         case 0xE8: /* PC87363 */
1137         case 0xE4: /* PC87364 */
1138                 nrdev = 1;
1139                 break;
1140         case 0xE5: /* PC87365 */
1141         case 0xE9: /* PC87366 */
1142                 nrdev = 3;
1143                 break;
1144         default:
1145                 superio_exit(sioaddr);
1146                 return -ENODEV;
1147         }
1148         /* Remember the device id */
1149         *devid = val;
1150 
1151         for (i = 0; i < nrdev; i++) {
1152                 /* select logical device */
1153                 superio_outb(sioaddr, DEV, logdev[i]);
1154 
1155                 val = superio_inb(sioaddr, ACT);
1156                 if (!(val & 0x01)) {
1157                         pr_info("Device 0x%02x not activated\n", logdev[i]);
1158                         continue;
1159                 }
1160 
1161                 val = (superio_inb(sioaddr, BASE) << 8)
1162                     | superio_inb(sioaddr, BASE + 1);
1163                 if (!val) {
1164                         pr_info("Base address not set for device 0x%02x\n",
1165                                 logdev[i]);
1166                         continue;
1167                 }
1168 
1169                 addresses[i] = val;
1170 
1171                 if (i == 0) { /* Fans */
1172                         confreg[0] = superio_inb(sioaddr, 0xF0);
1173                         confreg[1] = superio_inb(sioaddr, 0xF1);
1174 
1175                         pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 1,
1176                                  (confreg[0] >> 2) & 1, (confreg[0] >> 3) & 1,
1177                                  (confreg[0] >> 4) & 1);
1178                         pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 2,
1179                                  (confreg[0] >> 5) & 1, (confreg[0] >> 6) & 1,
1180                                  (confreg[0] >> 7) & 1);
1181                         pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 3,
1182                                  confreg[1] & 1, (confreg[1] >> 1) & 1,
1183                                  (confreg[1] >> 2) & 1);
1184                 } else if (i == 1) { /* Voltages */
1185                         /* Are we using thermistors? */
1186                         if (*devid == 0xE9) { /* PC87366 */
1187                                 /*
1188                                  * These registers are not logical-device
1189                                  * specific, just that we won't need them if
1190                                  * we don't use the VLM device
1191                                  */
1192                                 confreg[2] = superio_inb(sioaddr, 0x2B);
1193                                 confreg[3] = superio_inb(sioaddr, 0x25);
1194 
1195                                 if (confreg[2] & 0x40) {
1196                                         pr_info("Using thermistors for temperature monitoring\n");
1197                                 }
1198                                 if (confreg[3] & 0xE0) {
1199                                         pr_info("VID inputs routed (mode %u)\n",
1200                                                 confreg[3] >> 5);
1201                                 }
1202                         }
1203                 }
1204         }
1205 
1206         superio_exit(sioaddr);
1207         return 0;
1208 }
1209 
1210 static void pc87360_remove_files(struct device *dev)
1211 {
1212         int i;
1213 
1214         device_remove_file(dev, &dev_attr_name);
1215         device_remove_file(dev, &dev_attr_alarms_temp);
1216         for (i = 0; i < ARRAY_SIZE(pc8736x_temp_attr_group); i++)
1217                 sysfs_remove_group(&dev->kobj, &pc8736x_temp_attr_group[i]);
1218         for (i = 0; i < ARRAY_SIZE(pc8736x_fan_attr_group); i++) {
1219                 sysfs_remove_group(&pdev->dev.kobj, &pc8736x_fan_attr_group[i]);
1220                 device_remove_file(dev, &pwm[i].dev_attr);
1221         }
1222         sysfs_remove_group(&dev->kobj, &pc8736x_therm_group);
1223         sysfs_remove_group(&dev->kobj, &pc8736x_vin_group);
1224 }
1225 
1226 static int pc87360_probe(struct platform_device *pdev)
1227 {
1228         int i;
1229         struct pc87360_data *data;
1230         int err = 0;
1231         const char *name;
1232         int use_thermistors = 0;
1233         struct device *dev = &pdev->dev;
1234 
1235         data = devm_kzalloc(dev, sizeof(struct pc87360_data), GFP_KERNEL);
1236         if (!data)
1237                 return -ENOMEM;
1238 
1239         switch (devid) {
1240         default:
1241                 name = "pc87360";
1242                 data->fannr = 2;
1243                 break;
1244         case 0xe8:
1245                 name = "pc87363";
1246                 data->fannr = 2;
1247                 break;
1248         case 0xe4:
1249                 name = "pc87364";
1250                 data->fannr = 3;
1251                 break;
1252         case 0xe5:
1253                 name = "pc87365";
1254                 data->fannr = extra_isa[0] ? 3 : 0;
1255                 data->innr = extra_isa[1] ? 11 : 0;
1256                 data->tempnr = extra_isa[2] ? 2 : 0;
1257                 break;
1258         case 0xe9:
1259                 name = "pc87366";
1260                 data->fannr = extra_isa[0] ? 3 : 0;
1261                 data->innr = extra_isa[1] ? 14 : 0;
1262                 data->tempnr = extra_isa[2] ? 3 : 0;
1263                 break;
1264         }
1265 
1266         data->name = name;
1267         mutex_init(&data->lock);
1268         mutex_init(&data->update_lock);
1269         platform_set_drvdata(pdev, data);
1270 
1271         for (i = 0; i < LDNI_MAX; i++) {
1272                 data->address[i] = extra_isa[i];
1273                 if (data->address[i]
1274                  && !devm_request_region(dev, extra_isa[i], PC87360_EXTENT,
1275                                          pc87360_driver.driver.name)) {
1276                         dev_err(dev,
1277                                 "Region 0x%x-0x%x already in use!\n",
1278                                 extra_isa[i], extra_isa[i]+PC87360_EXTENT-1);
1279                         return -EBUSY;
1280                 }
1281         }
1282 
1283         /* Retrieve the fans configuration from Super-I/O space */
1284         if (data->fannr)
1285                 data->fan_conf = confreg[0] | (confreg[1] << 8);
1286 
1287         /*
1288          * Use the correct reference voltage
1289          * Unless both the VLM and the TMS logical devices agree to
1290          * use an external Vref, the internal one is used.
1291          */
1292         if (data->innr) {
1293                 i = pc87360_read_value(data, LD_IN, NO_BANK,
1294                                        PC87365_REG_IN_CONFIG);
1295                 if (data->tempnr) {
1296                         i &= pc87360_read_value(data, LD_TEMP, NO_BANK,
1297                                                 PC87365_REG_TEMP_CONFIG);
1298                 }
1299                 data->in_vref = (i&0x02) ? 3025 : 2966;
1300                 dev_dbg(dev, "Using %s reference voltage\n",
1301                         (i&0x02) ? "external" : "internal");
1302 
1303                 data->vid_conf = confreg[3];
1304                 data->vrm = vid_which_vrm();
1305         }
1306 
1307         /* Fan clock dividers may be needed before any data is read */
1308         for (i = 0; i < data->fannr; i++) {
1309                 if (FAN_CONFIG_MONITOR(data->fan_conf, i))
1310                         data->fan_status[i] = pc87360_read_value(data,
1311                                               LD_FAN, NO_BANK,
1312                                               PC87360_REG_FAN_STATUS(i));
1313         }
1314 
1315         if (init > 0) {
1316                 if (devid == 0xe9 && data->address[1]) /* PC87366 */
1317                         use_thermistors = confreg[2] & 0x40;
1318 
1319                 pc87360_init_device(pdev, use_thermistors);
1320         }
1321 
1322         /* Register all-or-nothing sysfs groups */
1323 
1324         if (data->innr) {
1325                 err = sysfs_create_group(&dev->kobj, &pc8736x_vin_group);
1326                 if (err)
1327                         goto error;
1328         }
1329 
1330         if (data->innr == 14) {
1331                 err = sysfs_create_group(&dev->kobj, &pc8736x_therm_group);
1332                 if (err)
1333                         goto error;
1334         }
1335 
1336         /* create device attr-files for varying sysfs groups */
1337 
1338         if (data->tempnr) {
1339                 for (i = 0; i < data->tempnr; i++) {
1340                         err = sysfs_create_group(&dev->kobj,
1341                                                  &pc8736x_temp_attr_group[i]);
1342                         if (err)
1343                                 goto error;
1344                 }
1345                 err = device_create_file(dev, &dev_attr_alarms_temp);
1346                 if (err)
1347                         goto error;
1348         }
1349 
1350         for (i = 0; i < data->fannr; i++) {
1351                 if (FAN_CONFIG_MONITOR(data->fan_conf, i)) {
1352                         err = sysfs_create_group(&dev->kobj,
1353                                                  &pc8736x_fan_attr_group[i]);
1354                         if (err)
1355                                 goto error;
1356                 }
1357                 if (FAN_CONFIG_CONTROL(data->fan_conf, i)) {
1358                         err = device_create_file(dev, &pwm[i].dev_attr);
1359                         if (err)
1360                                 goto error;
1361                 }
1362         }
1363 
1364         err = device_create_file(dev, &dev_attr_name);
1365         if (err)
1366                 goto error;
1367 
1368         data->hwmon_dev = hwmon_device_register(dev);
1369         if (IS_ERR(data->hwmon_dev)) {
1370                 err = PTR_ERR(data->hwmon_dev);
1371                 goto error;
1372         }
1373         return 0;
1374 
1375 error:
1376         pc87360_remove_files(dev);
1377         return err;
1378 }
1379 
1380 static int pc87360_remove(struct platform_device *pdev)
1381 {
1382         struct pc87360_data *data = platform_get_drvdata(pdev);
1383 
1384         hwmon_device_unregister(data->hwmon_dev);
1385         pc87360_remove_files(&pdev->dev);
1386 
1387         return 0;
1388 }
1389 
1390 /*
1391  * ldi is the logical device index
1392  * bank is for voltages and temperatures only
1393  */
1394 static int pc87360_read_value(struct pc87360_data *data, u8 ldi, u8 bank,
1395                               u8 reg)
1396 {
1397         int res;
1398 
1399         mutex_lock(&(data->lock));
1400         if (bank != NO_BANK)
1401                 outb_p(bank, data->address[ldi] + PC87365_REG_BANK);
1402         res = inb_p(data->address[ldi] + reg);
1403         mutex_unlock(&(data->lock));
1404 
1405         return res;
1406 }
1407 
1408 static void pc87360_write_value(struct pc87360_data *data, u8 ldi, u8 bank,
1409                                 u8 reg, u8 value)
1410 {
1411         mutex_lock(&(data->lock));
1412         if (bank != NO_BANK)
1413                 outb_p(bank, data->address[ldi] + PC87365_REG_BANK);
1414         outb_p(value, data->address[ldi] + reg);
1415         mutex_unlock(&(data->lock));
1416 }
1417 
1418 /* (temp & vin) channel conversion status register flags (pdf sec.11.5.12) */
1419 #define CHAN_CNVRTD     0x80    /* new data ready */
1420 #define CHAN_ENA        0x01    /* enabled channel (temp or vin) */
1421 #define CHAN_ALM_ENA    0x10    /* propagate to alarms-reg ?? (chk val!) */
1422 #define CHAN_READY      (CHAN_ENA|CHAN_CNVRTD) /* sample ready mask */
1423 
1424 #define TEMP_OTS_OE     0x20    /* OTS Output Enable */
1425 #define VIN_RW1C_MASK   (CHAN_READY|CHAN_ALM_MAX|CHAN_ALM_MIN)   /* 0x87 */
1426 #define TEMP_RW1C_MASK  (VIN_RW1C_MASK|TEMP_ALM_CRIT|TEMP_FAULT) /* 0xCF */
1427 
1428 static void pc87360_init_device(struct platform_device *pdev,
1429                                 int use_thermistors)
1430 {
1431         struct pc87360_data *data = platform_get_drvdata(pdev);
1432         int i, nr;
1433         const u8 init_in[14] = { 2, 2, 2, 2, 2, 2, 2, 1, 1, 3, 1, 2, 2, 2 };
1434         const u8 init_temp[3] = { 2, 2, 1 };
1435         u8 reg;
1436 
1437         if (init >= 2 && data->innr) {
1438                 reg = pc87360_read_value(data, LD_IN, NO_BANK,
1439                                          PC87365_REG_IN_CONVRATE);
1440                 dev_info(&pdev->dev,
1441                          "VLM conversion set to 1s period, 160us delay\n");
1442                 pc87360_write_value(data, LD_IN, NO_BANK,
1443                                     PC87365_REG_IN_CONVRATE,
1444                                     (reg & 0xC0) | 0x11);
1445         }
1446 
1447         nr = data->innr < 11 ? data->innr : 11;
1448         for (i = 0; i < nr; i++) {
1449                 reg = pc87360_read_value(data, LD_IN, i,
1450                                          PC87365_REG_IN_STATUS);
1451                 dev_dbg(&pdev->dev, "bios in%d status:0x%02x\n", i, reg);
1452                 if (init >= init_in[i]) {
1453                         /* Forcibly enable voltage channel */
1454                         if (!(reg & CHAN_ENA)) {
1455                                 dev_dbg(&pdev->dev, "Forcibly enabling in%d\n",
1456                                         i);
1457                                 pc87360_write_value(data, LD_IN, i,
1458                                                     PC87365_REG_IN_STATUS,
1459                                                     (reg & 0x68) | 0x87);
1460                         }
1461                 }
1462         }
1463 
1464         /*
1465          * We can't blindly trust the Super-I/O space configuration bit,
1466          * most BIOS won't set it properly
1467          */
1468         dev_dbg(&pdev->dev, "bios thermistors:%d\n", use_thermistors);
1469         for (i = 11; i < data->innr; i++) {
1470                 reg = pc87360_read_value(data, LD_IN, i,
1471                                          PC87365_REG_TEMP_STATUS);
1472                 use_thermistors = use_thermistors || (reg & CHAN_ENA);
1473                 /* thermistors are temp[4-6], measured on vin[11-14] */
1474                 dev_dbg(&pdev->dev, "bios temp%d_status:0x%02x\n", i-7, reg);
1475         }
1476         dev_dbg(&pdev->dev, "using thermistors:%d\n", use_thermistors);
1477 
1478         i = use_thermistors ? 2 : 0;
1479         for (; i < data->tempnr; i++) {
1480                 reg = pc87360_read_value(data, LD_TEMP, i,
1481                                          PC87365_REG_TEMP_STATUS);
1482                 dev_dbg(&pdev->dev, "bios temp%d_status:0x%02x\n", i + 1, reg);
1483                 if (init >= init_temp[i]) {
1484                         /* Forcibly enable temperature channel */
1485                         if (!(reg & CHAN_ENA)) {
1486                                 dev_dbg(&pdev->dev,
1487                                         "Forcibly enabling temp%d\n", i + 1);
1488                                 pc87360_write_value(data, LD_TEMP, i,
1489                                                     PC87365_REG_TEMP_STATUS,
1490                                                     0xCF);
1491                         }
1492                 }
1493         }
1494 
1495         if (use_thermistors) {
1496                 for (i = 11; i < data->innr; i++) {
1497                         if (init >= init_in[i]) {
1498                                 /*
1499                                  * The pin may already be used by thermal
1500                                  * diodes
1501                                  */
1502                                 reg = pc87360_read_value(data, LD_TEMP,
1503                                       (i - 11) / 2, PC87365_REG_TEMP_STATUS);
1504                                 if (reg & CHAN_ENA) {
1505                                         dev_dbg(&pdev->dev,
1506                         "Skipping temp%d, pin already in use by temp%d\n",
1507                                                 i - 7, (i - 11) / 2);
1508                                         continue;
1509                                 }
1510 
1511                                 /* Forcibly enable thermistor channel */
1512                                 reg = pc87360_read_value(data, LD_IN, i,
1513                                                          PC87365_REG_IN_STATUS);
1514                                 if (!(reg & CHAN_ENA)) {
1515                                         dev_dbg(&pdev->dev,
1516                                                 "Forcibly enabling temp%d\n",
1517                                                 i - 7);
1518                                         pc87360_write_value(data, LD_IN, i,
1519                                                 PC87365_REG_TEMP_STATUS,
1520                                                 (reg & 0x60) | 0x8F);
1521                                 }
1522                         }
1523                 }
1524         }
1525 
1526         if (data->innr) {
1527                 reg = pc87360_read_value(data, LD_IN, NO_BANK,
1528                                          PC87365_REG_IN_CONFIG);
1529                 dev_dbg(&pdev->dev, "bios vin-cfg:0x%02x\n", reg);
1530                 if (reg & CHAN_ENA) {
1531                         dev_dbg(&pdev->dev,
1532                                 "Forcibly enabling monitoring (VLM)\n");
1533                         pc87360_write_value(data, LD_IN, NO_BANK,
1534                                             PC87365_REG_IN_CONFIG,
1535                                             reg & 0xFE);
1536                 }
1537         }
1538 
1539         if (data->tempnr) {
1540                 reg = pc87360_read_value(data, LD_TEMP, NO_BANK,
1541                                          PC87365_REG_TEMP_CONFIG);
1542                 dev_dbg(&pdev->dev, "bios temp-cfg:0x%02x\n", reg);
1543                 if (reg & CHAN_ENA) {
1544                         dev_dbg(&pdev->dev,
1545                                 "Forcibly enabling monitoring (TMS)\n");
1546                         pc87360_write_value(data, LD_TEMP, NO_BANK,
1547                                             PC87365_REG_TEMP_CONFIG,
1548                                             reg & 0xFE);
1549                 }
1550 
1551                 if (init >= 2) {
1552                         /* Chip config as documented by National Semi. */
1553                         pc87360_write_value(data, LD_TEMP, 0xF, 0xA, 0x08);
1554                         /*
1555                          * We voluntarily omit the bank here, in case the
1556                          * sequence itself matters. It shouldn't be a problem,
1557                          * since nobody else is supposed to access the
1558                          * device at that point.
1559                          */
1560                         pc87360_write_value(data, LD_TEMP, NO_BANK, 0xB, 0x04);
1561                         pc87360_write_value(data, LD_TEMP, NO_BANK, 0xC, 0x35);
1562                         pc87360_write_value(data, LD_TEMP, NO_BANK, 0xD, 0x05);
1563                         pc87360_write_value(data, LD_TEMP, NO_BANK, 0xE, 0x05);
1564                 }
1565         }
1566 }
1567 
1568 static void pc87360_autodiv(struct device *dev, int nr)
1569 {
1570         struct pc87360_data *data = dev_get_drvdata(dev);
1571         u8 old_min = data->fan_min[nr];
1572 
1573         /* Increase clock divider if needed and possible */
1574         if ((data->fan_status[nr] & 0x04) /* overflow flag */
1575          || (data->fan[nr] >= 224)) { /* next to overflow */
1576                 if ((data->fan_status[nr] & 0x60) != 0x60) {
1577                         data->fan_status[nr] += 0x20;
1578                         data->fan_min[nr] >>= 1;
1579                         data->fan[nr] >>= 1;
1580                         dev_dbg(dev,
1581                                 "Increasing clock divider to %d for fan %d\n",
1582                                 FAN_DIV_FROM_REG(data->fan_status[nr]), nr + 1);
1583                 }
1584         } else {
1585                 /* Decrease clock divider if possible */
1586                 while (!(data->fan_min[nr] & 0x80) /* min "nails" divider */
1587                  && data->fan[nr] < 85 /* bad accuracy */
1588                  && (data->fan_status[nr] & 0x60) != 0x00) {
1589                         data->fan_status[nr] -= 0x20;
1590                         data->fan_min[nr] <<= 1;
1591                         data->fan[nr] <<= 1;
1592                         dev_dbg(dev,
1593                                 "Decreasing clock divider to %d for fan %d\n",
1594                                 FAN_DIV_FROM_REG(data->fan_status[nr]),
1595                                 nr + 1);
1596                 }
1597         }
1598 
1599         /* Write new fan min if it changed */
1600         if (old_min != data->fan_min[nr]) {
1601                 pc87360_write_value(data, LD_FAN, NO_BANK,
1602                                     PC87360_REG_FAN_MIN(nr),
1603                                     data->fan_min[nr]);
1604         }
1605 }
1606 
1607 static struct pc87360_data *pc87360_update_device(struct device *dev)
1608 {
1609         struct pc87360_data *data = dev_get_drvdata(dev);
1610         u8 i;
1611 
1612         mutex_lock(&data->update_lock);
1613 
1614         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
1615                 dev_dbg(dev, "Data update\n");
1616 
1617                 /* Fans */
1618                 for (i = 0; i < data->fannr; i++) {
1619                         if (FAN_CONFIG_MONITOR(data->fan_conf, i)) {
1620                                 data->fan_status[i] =
1621                                         pc87360_read_value(data, LD_FAN,
1622                                         NO_BANK, PC87360_REG_FAN_STATUS(i));
1623                                 data->fan[i] = pc87360_read_value(data, LD_FAN,
1624                                                NO_BANK, PC87360_REG_FAN(i));
1625                                 data->fan_min[i] = pc87360_read_value(data,
1626                                                    LD_FAN, NO_BANK,
1627                                                    PC87360_REG_FAN_MIN(i));
1628                                 /* Change clock divider if needed */
1629                                 pc87360_autodiv(dev, i);
1630                                 /* Clear bits and write new divider */
1631                                 pc87360_write_value(data, LD_FAN, NO_BANK,
1632                                                     PC87360_REG_FAN_STATUS(i),
1633                                                     data->fan_status[i]);
1634                         }
1635                         if (FAN_CONFIG_CONTROL(data->fan_conf, i))
1636                                 data->pwm[i] = pc87360_read_value(data, LD_FAN,
1637                                                NO_BANK, PC87360_REG_PWM(i));
1638                 }
1639 
1640                 /* Voltages */
1641                 for (i = 0; i < data->innr; i++) {
1642                         data->in_status[i] = pc87360_read_value(data, LD_IN, i,
1643                                              PC87365_REG_IN_STATUS);
1644                         /* Clear bits */
1645                         pc87360_write_value(data, LD_IN, i,
1646                                             PC87365_REG_IN_STATUS,
1647                                             data->in_status[i]);
1648                         if ((data->in_status[i] & CHAN_READY) == CHAN_READY) {
1649                                 data->in[i] = pc87360_read_value(data, LD_IN,
1650                                               i, PC87365_REG_IN);
1651                         }
1652                         if (data->in_status[i] & CHAN_ENA) {
1653                                 data->in_min[i] = pc87360_read_value(data,
1654                                                   LD_IN, i,
1655                                                   PC87365_REG_IN_MIN);
1656                                 data->in_max[i] = pc87360_read_value(data,
1657                                                   LD_IN, i,
1658                                                   PC87365_REG_IN_MAX);
1659                                 if (i >= 11)
1660                                         data->in_crit[i-11] =
1661                                                 pc87360_read_value(data, LD_IN,
1662                                                 i, PC87365_REG_TEMP_CRIT);
1663                         }
1664                 }
1665                 if (data->innr) {
1666                         data->in_alarms = pc87360_read_value(data, LD_IN,
1667                                           NO_BANK, PC87365_REG_IN_ALARMS1)
1668                                         | ((pc87360_read_value(data, LD_IN,
1669                                             NO_BANK, PC87365_REG_IN_ALARMS2)
1670                                             & 0x07) << 8);
1671                         data->vid = (data->vid_conf & 0xE0) ?
1672                                     pc87360_read_value(data, LD_IN,
1673                                     NO_BANK, PC87365_REG_VID) : 0x1F;
1674                 }
1675 
1676                 /* Temperatures */
1677                 for (i = 0; i < data->tempnr; i++) {
1678                         data->temp_status[i] = pc87360_read_value(data,
1679                                                LD_TEMP, i,
1680                                                PC87365_REG_TEMP_STATUS);
1681                         /* Clear bits */
1682                         pc87360_write_value(data, LD_TEMP, i,
1683                                             PC87365_REG_TEMP_STATUS,
1684                                             data->temp_status[i]);
1685                         if ((data->temp_status[i] & CHAN_READY) == CHAN_READY) {
1686                                 data->temp[i] = pc87360_read_value(data,
1687                                                 LD_TEMP, i,
1688                                                 PC87365_REG_TEMP);
1689                         }
1690                         if (data->temp_status[i] & CHAN_ENA) {
1691                                 data->temp_min[i] = pc87360_read_value(data,
1692                                                     LD_TEMP, i,
1693                                                     PC87365_REG_TEMP_MIN);
1694                                 data->temp_max[i] = pc87360_read_value(data,
1695                                                     LD_TEMP, i,
1696                                                     PC87365_REG_TEMP_MAX);
1697                                 data->temp_crit[i] = pc87360_read_value(data,
1698                                                      LD_TEMP, i,
1699                                                      PC87365_REG_TEMP_CRIT);
1700                         }
1701                 }
1702                 if (data->tempnr) {
1703                         data->temp_alarms = pc87360_read_value(data, LD_TEMP,
1704                                             NO_BANK, PC87365_REG_TEMP_ALARMS)
1705                                             & 0x3F;
1706                 }
1707 
1708                 data->last_updated = jiffies;
1709                 data->valid = 1;
1710         }
1711 
1712         mutex_unlock(&data->update_lock);
1713 
1714         return data;
1715 }
1716 
1717 static int __init pc87360_device_add(unsigned short address)
1718 {
1719         struct resource res[3];
1720         int err, i, res_count;
1721 
1722         pdev = platform_device_alloc("pc87360", address);
1723         if (!pdev) {
1724                 err = -ENOMEM;
1725                 pr_err("Device allocation failed\n");
1726                 goto exit;
1727         }
1728 
1729         memset(res, 0, 3 * sizeof(struct resource));
1730         res_count = 0;
1731         for (i = 0; i < 3; i++) {
1732                 if (!extra_isa[i])
1733                         continue;
1734                 res[res_count].start = extra_isa[i];
1735                 res[res_count].end = extra_isa[i] + PC87360_EXTENT - 1;
1736                 res[res_count].name = "pc87360",
1737                 res[res_count].flags = IORESOURCE_IO,
1738 
1739                 err = acpi_check_resource_conflict(&res[res_count]);
1740                 if (err)
1741                         goto exit_device_put;
1742 
1743                 res_count++;
1744         }
1745 
1746         err = platform_device_add_resources(pdev, res, res_count);
1747         if (err) {
1748                 pr_err("Device resources addition failed (%d)\n", err);
1749                 goto exit_device_put;
1750         }
1751 
1752         err = platform_device_add(pdev);
1753         if (err) {
1754                 pr_err("Device addition failed (%d)\n", err);
1755                 goto exit_device_put;
1756         }
1757 
1758         return 0;
1759 
1760 exit_device_put:
1761         platform_device_put(pdev);
1762 exit:
1763         return err;
1764 }
1765 
1766 static int __init pc87360_init(void)
1767 {
1768         int err, i;
1769         unsigned short address = 0;
1770 
1771         if (pc87360_find(0x2e, &devid, extra_isa)
1772          && pc87360_find(0x4e, &devid, extra_isa)) {
1773                 pr_warn("PC8736x not detected, module not inserted\n");
1774                 return -ENODEV;
1775         }
1776 
1777         /* Arbitrarily pick one of the addresses */
1778         for (i = 0; i < 3; i++) {
1779                 if (extra_isa[i] != 0x0000) {
1780                         address = extra_isa[i];
1781                         break;
1782                 }
1783         }
1784 
1785         if (address == 0x0000) {
1786                 pr_warn("No active logical device, module not inserted\n");
1787                 return -ENODEV;
1788         }
1789 
1790         err = platform_driver_register(&pc87360_driver);
1791         if (err)
1792                 goto exit;
1793 
1794         /* Sets global pdev as a side effect */
1795         err = pc87360_device_add(address);
1796         if (err)
1797                 goto exit_driver;
1798 
1799         return 0;
1800 
1801  exit_driver:
1802         platform_driver_unregister(&pc87360_driver);
1803  exit:
1804         return err;
1805 }
1806 
1807 static void __exit pc87360_exit(void)
1808 {
1809         platform_device_unregister(pdev);
1810         platform_driver_unregister(&pc87360_driver);
1811 }
1812 
1813 
1814 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1815 MODULE_DESCRIPTION("PC8736x hardware monitor");
1816 MODULE_LICENSE("GPL");
1817 
1818 module_init(pc87360_init);
1819 module_exit(pc87360_exit);
1820 

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