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

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