1 /*
2 * w83795.c - Linux kernel driver for hardware monitoring
3 * Copyright (C) 2008 Nuvoton Technology Corp.
4 * Wei Song
5 * Copyright (C) 2010 Jean Delvare <jdelvare@suse.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation - version 2.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * 02110-1301 USA.
20 *
21 * Supports following chips:
22 *
23 * Chip #vin #fanin #pwm #temp #dts wchipid vendid i2c ISA
24 * w83795g 21 14 8 6 8 0x79 0x5ca3 yes no
25 * w83795adg 18 14 2 6 8 0x79 0x5ca3 yes no
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/i2c.h>
33 #include <linux/hwmon.h>
34 #include <linux/hwmon-sysfs.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
37 #include <linux/jiffies.h>
38 #include <linux/util_macros.h>
39
40 /* Addresses to scan */
41 static const unsigned short normal_i2c[] = {
42 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
43 };
44
45
46 static bool reset;
47 module_param(reset, bool, 0);
48 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
49
50
51 #define W83795_REG_BANKSEL 0x00
52 #define W83795_REG_VENDORID 0xfd
53 #define W83795_REG_CHIPID 0xfe
54 #define W83795_REG_DEVICEID 0xfb
55 #define W83795_REG_DEVICEID_A 0xff
56
57 #define W83795_REG_I2C_ADDR 0xfc
58 #define W83795_REG_CONFIG 0x01
59 #define W83795_REG_CONFIG_CONFIG48 0x04
60 #define W83795_REG_CONFIG_START 0x01
61
62 /* Multi-Function Pin Ctrl Registers */
63 #define W83795_REG_VOLT_CTRL1 0x02
64 #define W83795_REG_VOLT_CTRL2 0x03
65 #define W83795_REG_TEMP_CTRL1 0x04
66 #define W83795_REG_TEMP_CTRL2 0x05
67 #define W83795_REG_FANIN_CTRL1 0x06
68 #define W83795_REG_FANIN_CTRL2 0x07
69 #define W83795_REG_VMIGB_CTRL 0x08
70
71 #define TEMP_READ 0
72 #define TEMP_CRIT 1
73 #define TEMP_CRIT_HYST 2
74 #define TEMP_WARN 3
75 #define TEMP_WARN_HYST 4
76 /*
77 * only crit and crit_hyst affect real-time alarm status
78 * current crit crit_hyst warn warn_hyst
79 */
80 static const u16 W83795_REG_TEMP[][5] = {
81 {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
82 {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
83 {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
84 {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
85 {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
86 {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
87 };
88
89 #define IN_READ 0
90 #define IN_MAX 1
91 #define IN_LOW 2
92 static const u16 W83795_REG_IN[][3] = {
93 /* Current, HL, LL */
94 {0x10, 0x70, 0x71}, /* VSEN1 */
95 {0x11, 0x72, 0x73}, /* VSEN2 */
96 {0x12, 0x74, 0x75}, /* VSEN3 */
97 {0x13, 0x76, 0x77}, /* VSEN4 */
98 {0x14, 0x78, 0x79}, /* VSEN5 */
99 {0x15, 0x7a, 0x7b}, /* VSEN6 */
100 {0x16, 0x7c, 0x7d}, /* VSEN7 */
101 {0x17, 0x7e, 0x7f}, /* VSEN8 */
102 {0x18, 0x80, 0x81}, /* VSEN9 */
103 {0x19, 0x82, 0x83}, /* VSEN10 */
104 {0x1A, 0x84, 0x85}, /* VSEN11 */
105 {0x1B, 0x86, 0x87}, /* VTT */
106 {0x1C, 0x88, 0x89}, /* 3VDD */
107 {0x1D, 0x8a, 0x8b}, /* 3VSB */
108 {0x1E, 0x8c, 0x8d}, /* VBAT */
109 {0x1F, 0xa6, 0xa7}, /* VSEN12 */
110 {0x20, 0xaa, 0xab}, /* VSEN13 */
111 {0x21, 0x96, 0x97}, /* VSEN14 */
112 {0x22, 0x9a, 0x9b}, /* VSEN15 */
113 {0x23, 0x9e, 0x9f}, /* VSEN16 */
114 {0x24, 0xa2, 0xa3}, /* VSEN17 */
115 };
116 #define W83795_REG_VRLSB 0x3C
117
118 static const u8 W83795_REG_IN_HL_LSB[] = {
119 0x8e, /* VSEN1-4 */
120 0x90, /* VSEN5-8 */
121 0x92, /* VSEN9-11 */
122 0x94, /* VTT, 3VDD, 3VSB, 3VBAT */
123 0xa8, /* VSEN12 */
124 0xac, /* VSEN13 */
125 0x98, /* VSEN14 */
126 0x9c, /* VSEN15 */
127 0xa0, /* VSEN16 */
128 0xa4, /* VSEN17 */
129 };
130
131 #define IN_LSB_REG(index, type) \
132 (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
133 : (W83795_REG_IN_HL_LSB[(index)] + 1))
134
135 #define IN_LSB_SHIFT 0
136 #define IN_LSB_IDX 1
137 static const u8 IN_LSB_SHIFT_IDX[][2] = {
138 /* High/Low LSB shift, LSB No. */
139 {0x00, 0x00}, /* VSEN1 */
140 {0x02, 0x00}, /* VSEN2 */
141 {0x04, 0x00}, /* VSEN3 */
142 {0x06, 0x00}, /* VSEN4 */
143 {0x00, 0x01}, /* VSEN5 */
144 {0x02, 0x01}, /* VSEN6 */
145 {0x04, 0x01}, /* VSEN7 */
146 {0x06, 0x01}, /* VSEN8 */
147 {0x00, 0x02}, /* VSEN9 */
148 {0x02, 0x02}, /* VSEN10 */
149 {0x04, 0x02}, /* VSEN11 */
150 {0x00, 0x03}, /* VTT */
151 {0x02, 0x03}, /* 3VDD */
152 {0x04, 0x03}, /* 3VSB */
153 {0x06, 0x03}, /* VBAT */
154 {0x06, 0x04}, /* VSEN12 */
155 {0x06, 0x05}, /* VSEN13 */
156 {0x06, 0x06}, /* VSEN14 */
157 {0x06, 0x07}, /* VSEN15 */
158 {0x06, 0x08}, /* VSEN16 */
159 {0x06, 0x09}, /* VSEN17 */
160 };
161
162
163 #define W83795_REG_FAN(index) (0x2E + (index))
164 #define W83795_REG_FAN_MIN_HL(index) (0xB6 + (index))
165 #define W83795_REG_FAN_MIN_LSB(index) (0xC4 + (index) / 2)
166 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
167 (((index) & 1) ? 4 : 0)
168
169 #define W83795_REG_VID_CTRL 0x6A
170
171 #define W83795_REG_ALARM_CTRL 0x40
172 #define ALARM_CTRL_RTSACS (1 << 7)
173 #define W83795_REG_ALARM(index) (0x41 + (index))
174 #define W83795_REG_CLR_CHASSIS 0x4D
175 #define W83795_REG_BEEP(index) (0x50 + (index))
176
177 #define W83795_REG_OVT_CFG 0x58
178 #define OVT_CFG_SEL (1 << 7)
179
180
181 #define W83795_REG_FCMS1 0x201
182 #define W83795_REG_FCMS2 0x208
183 #define W83795_REG_TFMR(index) (0x202 + (index))
184 #define W83795_REG_FOMC 0x20F
185
186 #define W83795_REG_TSS(index) (0x209 + (index))
187
188 #define TSS_MAP_RESERVED 0xff
189 static const u8 tss_map[4][6] = {
190 { 0, 1, 2, 3, 4, 5},
191 { 6, 7, 8, 9, 0, 1},
192 {10, 11, 12, 13, 2, 3},
193 { 4, 5, 4, 5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
194 };
195
196 #define PWM_OUTPUT 0
197 #define PWM_FREQ 1
198 #define PWM_START 2
199 #define PWM_NONSTOP 3
200 #define PWM_STOP_TIME 4
201 #define W83795_REG_PWM(index, nr) (0x210 + (nr) * 8 + (index))
202
203 #define W83795_REG_FTSH(index) (0x240 + (index) * 2)
204 #define W83795_REG_FTSL(index) (0x241 + (index) * 2)
205 #define W83795_REG_TFTS 0x250
206
207 #define TEMP_PWM_TTTI 0
208 #define TEMP_PWM_CTFS 1
209 #define TEMP_PWM_HCT 2
210 #define TEMP_PWM_HOT 3
211 #define W83795_REG_TTTI(index) (0x260 + (index))
212 #define W83795_REG_CTFS(index) (0x268 + (index))
213 #define W83795_REG_HT(index) (0x270 + (index))
214
215 #define SF4_TEMP 0
216 #define SF4_PWM 1
217 #define W83795_REG_SF4_TEMP(temp_num, index) \
218 (0x280 + 0x10 * (temp_num) + (index))
219 #define W83795_REG_SF4_PWM(temp_num, index) \
220 (0x288 + 0x10 * (temp_num) + (index))
221
222 #define W83795_REG_DTSC 0x301
223 #define W83795_REG_DTSE 0x302
224 #define W83795_REG_DTS(index) (0x26 + (index))
225 #define W83795_REG_PECI_TBASE(index) (0x320 + (index))
226
227 #define DTS_CRIT 0
228 #define DTS_CRIT_HYST 1
229 #define DTS_WARN 2
230 #define DTS_WARN_HYST 3
231 #define W83795_REG_DTS_EXT(index) (0xB2 + (index))
232
233 #define SETUP_PWM_DEFAULT 0
234 #define SETUP_PWM_UPTIME 1
235 #define SETUP_PWM_DOWNTIME 2
236 #define W83795_REG_SETUP_PWM(index) (0x20C + (index))
237
in_from_reg(u8 index,u16 val)238 static inline u16 in_from_reg(u8 index, u16 val)
239 {
240 /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
241 if (index >= 12 && index <= 14)
242 return val * 6;
243 else
244 return val * 2;
245 }
246
in_to_reg(u8 index,u16 val)247 static inline u16 in_to_reg(u8 index, u16 val)
248 {
249 if (index >= 12 && index <= 14)
250 return val / 6;
251 else
252 return val / 2;
253 }
254
fan_from_reg(u16 val)255 static inline unsigned long fan_from_reg(u16 val)
256 {
257 if ((val == 0xfff) || (val == 0))
258 return 0;
259 return 1350000UL / val;
260 }
261
fan_to_reg(long rpm)262 static inline u16 fan_to_reg(long rpm)
263 {
264 if (rpm <= 0)
265 return 0x0fff;
266 return clamp_val((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
267 }
268
time_from_reg(u8 reg)269 static inline unsigned long time_from_reg(u8 reg)
270 {
271 return reg * 100;
272 }
273
time_to_reg(unsigned long val)274 static inline u8 time_to_reg(unsigned long val)
275 {
276 return clamp_val((val + 50) / 100, 0, 0xff);
277 }
278
temp_from_reg(s8 reg)279 static inline long temp_from_reg(s8 reg)
280 {
281 return reg * 1000;
282 }
283
temp_to_reg(long val,s8 min,s8 max)284 static inline s8 temp_to_reg(long val, s8 min, s8 max)
285 {
286 return clamp_val(val / 1000, min, max);
287 }
288
289 static const u16 pwm_freq_cksel0[16] = {
290 1024, 512, 341, 256, 205, 171, 146, 128,
291 85, 64, 32, 16, 8, 4, 2, 1
292 };
293
pwm_freq_from_reg(u8 reg,u16 clkin)294 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
295 {
296 unsigned long base_clock;
297
298 if (reg & 0x80) {
299 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
300 return base_clock / ((reg & 0x7f) + 1);
301 } else
302 return pwm_freq_cksel0[reg & 0x0f];
303 }
304
pwm_freq_to_reg(unsigned long val,u16 clkin)305 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
306 {
307 unsigned long base_clock;
308 u8 reg0, reg1;
309 unsigned long best0, best1;
310
311 /* Best fit for cksel = 0 */
312 reg0 = find_closest_descending(val, pwm_freq_cksel0,
313 ARRAY_SIZE(pwm_freq_cksel0));
314 if (val < 375) /* cksel = 1 can't beat this */
315 return reg0;
316 best0 = pwm_freq_cksel0[reg0];
317
318 /* Best fit for cksel = 1 */
319 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
320 reg1 = clamp_val(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
321 best1 = base_clock / reg1;
322 reg1 = 0x80 | (reg1 - 1);
323
324 /* Choose the closest one */
325 if (abs(val - best0) > abs(val - best1))
326 return reg1;
327 else
328 return reg0;
329 }
330
331 enum chip_types {w83795g, w83795adg};
332
333 struct w83795_data {
334 struct device *hwmon_dev;
335 struct mutex update_lock;
336 unsigned long last_updated; /* In jiffies */
337 enum chip_types chip_type;
338
339 u8 bank;
340
341 u32 has_in; /* Enable monitor VIN or not */
342 u8 has_dyn_in; /* Only in2-0 can have this */
343 u16 in[21][3]; /* Register value, read/high/low */
344 u8 in_lsb[10][3]; /* LSB Register value, high/low */
345 u8 has_gain; /* has gain: in17-20 * 8 */
346
347 u16 has_fan; /* Enable fan14-1 or not */
348 u16 fan[14]; /* Register value combine */
349 u16 fan_min[14]; /* Register value combine */
350
351 u8 has_temp; /* Enable monitor temp6-1 or not */
352 s8 temp[6][5]; /* current, crit, crit_hyst, warn, warn_hyst */
353 u8 temp_read_vrlsb[6];
354 u8 temp_mode; /* Bit vector, 0 = TR, 1 = TD */
355 u8 temp_src[3]; /* Register value */
356
357 u8 enable_dts; /*
358 * Enable PECI and SB-TSI,
359 * bit 0: =1 enable, =0 disable,
360 * bit 1: =1 AMD SB-TSI, =0 Intel PECI
361 */
362 u8 has_dts; /* Enable monitor DTS temp */
363 s8 dts[8]; /* Register value */
364 u8 dts_read_vrlsb[8]; /* Register value */
365 s8 dts_ext[4]; /* Register value */
366
367 u8 has_pwm; /*
368 * 795g supports 8 pwm, 795adg only supports 2,
369 * no config register, only affected by chip
370 * type
371 */
372 u8 pwm[8][5]; /*
373 * Register value, output, freq, start,
374 * non stop, stop time
375 */
376 u16 clkin; /* CLKIN frequency in kHz */
377 u8 pwm_fcms[2]; /* Register value */
378 u8 pwm_tfmr[6]; /* Register value */
379 u8 pwm_fomc; /* Register value */
380
381 u16 target_speed[8]; /*
382 * Register value, target speed for speed
383 * cruise
384 */
385 u8 tol_speed; /* tolerance of target speed */
386 u8 pwm_temp[6][4]; /* TTTI, CTFS, HCT, HOT */
387 u8 sf4_reg[6][2][7]; /* 6 temp, temp/dcpwm, 7 registers */
388
389 u8 setup_pwm[3]; /* Register value */
390
391 u8 alarms[6]; /* Register value */
392 u8 enable_beep;
393 u8 beeps[6]; /* Register value */
394
395 char valid;
396 char valid_limits;
397 char valid_pwm_config;
398 };
399
400 /*
401 * Hardware access
402 * We assume that nobdody can change the bank outside the driver.
403 */
404
405 /* Must be called with data->update_lock held, except during initialization */
w83795_set_bank(struct i2c_client * client,u8 bank)406 static int w83795_set_bank(struct i2c_client *client, u8 bank)
407 {
408 struct w83795_data *data = i2c_get_clientdata(client);
409 int err;
410
411 /* If the same bank is already set, nothing to do */
412 if ((data->bank & 0x07) == bank)
413 return 0;
414
415 /* Change to new bank, preserve all other bits */
416 bank |= data->bank & ~0x07;
417 err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
418 if (err < 0) {
419 dev_err(&client->dev,
420 "Failed to set bank to %d, err %d\n",
421 (int)bank, err);
422 return err;
423 }
424 data->bank = bank;
425
426 return 0;
427 }
428
429 /* Must be called with data->update_lock held, except during initialization */
w83795_read(struct i2c_client * client,u16 reg)430 static u8 w83795_read(struct i2c_client *client, u16 reg)
431 {
432 int err;
433
434 err = w83795_set_bank(client, reg >> 8);
435 if (err < 0)
436 return 0x00; /* Arbitrary */
437
438 err = i2c_smbus_read_byte_data(client, reg & 0xff);
439 if (err < 0) {
440 dev_err(&client->dev,
441 "Failed to read from register 0x%03x, err %d\n",
442 (int)reg, err);
443 return 0x00; /* Arbitrary */
444 }
445 return err;
446 }
447
448 /* Must be called with data->update_lock held, except during initialization */
w83795_write(struct i2c_client * client,u16 reg,u8 value)449 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
450 {
451 int err;
452
453 err = w83795_set_bank(client, reg >> 8);
454 if (err < 0)
455 return err;
456
457 err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
458 if (err < 0)
459 dev_err(&client->dev,
460 "Failed to write to register 0x%03x, err %d\n",
461 (int)reg, err);
462 return err;
463 }
464
w83795_update_limits(struct i2c_client * client)465 static void w83795_update_limits(struct i2c_client *client)
466 {
467 struct w83795_data *data = i2c_get_clientdata(client);
468 int i, limit;
469 u8 lsb;
470
471 /* Read the voltage limits */
472 for (i = 0; i < ARRAY_SIZE(data->in); i++) {
473 if (!(data->has_in & (1 << i)))
474 continue;
475 data->in[i][IN_MAX] =
476 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
477 data->in[i][IN_LOW] =
478 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
479 }
480 for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
481 if ((i == 2 && data->chip_type == w83795adg) ||
482 (i >= 4 && !(data->has_in & (1 << (i + 11)))))
483 continue;
484 data->in_lsb[i][IN_MAX] =
485 w83795_read(client, IN_LSB_REG(i, IN_MAX));
486 data->in_lsb[i][IN_LOW] =
487 w83795_read(client, IN_LSB_REG(i, IN_LOW));
488 }
489
490 /* Read the fan limits */
491 lsb = 0; /* Silent false gcc warning */
492 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
493 /*
494 * Each register contains LSB for 2 fans, but we want to
495 * read it only once to save time
496 */
497 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
498 lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
499
500 if (!(data->has_fan & (1 << i)))
501 continue;
502 data->fan_min[i] =
503 w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
504 data->fan_min[i] |=
505 (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
506 }
507
508 /* Read the temperature limits */
509 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
510 if (!(data->has_temp & (1 << i)))
511 continue;
512 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
513 data->temp[i][limit] =
514 w83795_read(client, W83795_REG_TEMP[i][limit]);
515 }
516
517 /* Read the DTS limits */
518 if (data->enable_dts) {
519 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
520 data->dts_ext[limit] =
521 w83795_read(client, W83795_REG_DTS_EXT(limit));
522 }
523
524 /* Read beep settings */
525 if (data->enable_beep) {
526 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
527 data->beeps[i] =
528 w83795_read(client, W83795_REG_BEEP(i));
529 }
530
531 data->valid_limits = 1;
532 }
533
w83795_update_pwm_config(struct device * dev)534 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
535 {
536 struct i2c_client *client = to_i2c_client(dev);
537 struct w83795_data *data = i2c_get_clientdata(client);
538 int i, tmp;
539
540 mutex_lock(&data->update_lock);
541
542 if (data->valid_pwm_config)
543 goto END;
544
545 /* Read temperature source selection */
546 for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
547 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
548
549 /* Read automatic fan speed control settings */
550 data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
551 data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
552 for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
553 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
554 data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
555 for (i = 0; i < data->has_pwm; i++) {
556 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
557 data->pwm[i][tmp] =
558 w83795_read(client, W83795_REG_PWM(i, tmp));
559 }
560 for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
561 data->target_speed[i] =
562 w83795_read(client, W83795_REG_FTSH(i)) << 4;
563 data->target_speed[i] |=
564 w83795_read(client, W83795_REG_FTSL(i)) >> 4;
565 }
566 data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
567
568 for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
569 data->pwm_temp[i][TEMP_PWM_TTTI] =
570 w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
571 data->pwm_temp[i][TEMP_PWM_CTFS] =
572 w83795_read(client, W83795_REG_CTFS(i));
573 tmp = w83795_read(client, W83795_REG_HT(i));
574 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
575 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
576 }
577
578 /* Read SmartFanIV trip points */
579 for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
580 for (tmp = 0; tmp < 7; tmp++) {
581 data->sf4_reg[i][SF4_TEMP][tmp] =
582 w83795_read(client,
583 W83795_REG_SF4_TEMP(i, tmp));
584 data->sf4_reg[i][SF4_PWM][tmp] =
585 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
586 }
587 }
588
589 /* Read setup PWM */
590 for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
591 data->setup_pwm[i] =
592 w83795_read(client, W83795_REG_SETUP_PWM(i));
593
594 data->valid_pwm_config = 1;
595
596 END:
597 mutex_unlock(&data->update_lock);
598 return data;
599 }
600
w83795_update_device(struct device * dev)601 static struct w83795_data *w83795_update_device(struct device *dev)
602 {
603 struct i2c_client *client = to_i2c_client(dev);
604 struct w83795_data *data = i2c_get_clientdata(client);
605 u16 tmp;
606 u8 intrusion;
607 int i;
608
609 mutex_lock(&data->update_lock);
610
611 if (!data->valid_limits)
612 w83795_update_limits(client);
613
614 if (!(time_after(jiffies, data->last_updated + HZ * 2)
615 || !data->valid))
616 goto END;
617
618 /* Update the voltages value */
619 for (i = 0; i < ARRAY_SIZE(data->in); i++) {
620 if (!(data->has_in & (1 << i)))
621 continue;
622 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
623 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
624 data->in[i][IN_READ] = tmp;
625 }
626
627 /* in0-2 can have dynamic limits (W83795G only) */
628 if (data->has_dyn_in) {
629 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
630 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
631
632 for (i = 0; i < 3; i++) {
633 if (!(data->has_dyn_in & (1 << i)))
634 continue;
635 data->in[i][IN_MAX] =
636 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
637 data->in[i][IN_LOW] =
638 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
639 data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
640 data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
641 }
642 }
643
644 /* Update fan */
645 for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
646 if (!(data->has_fan & (1 << i)))
647 continue;
648 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
649 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
650 }
651
652 /* Update temperature */
653 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
654 data->temp[i][TEMP_READ] =
655 w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
656 data->temp_read_vrlsb[i] =
657 w83795_read(client, W83795_REG_VRLSB);
658 }
659
660 /* Update dts temperature */
661 if (data->enable_dts) {
662 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
663 if (!(data->has_dts & (1 << i)))
664 continue;
665 data->dts[i] =
666 w83795_read(client, W83795_REG_DTS(i));
667 data->dts_read_vrlsb[i] =
668 w83795_read(client, W83795_REG_VRLSB);
669 }
670 }
671
672 /* Update pwm output */
673 for (i = 0; i < data->has_pwm; i++) {
674 data->pwm[i][PWM_OUTPUT] =
675 w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
676 }
677
678 /*
679 * Update intrusion and alarms
680 * It is important to read intrusion first, because reading from
681 * register SMI STS6 clears the interrupt status temporarily.
682 */
683 tmp = w83795_read(client, W83795_REG_ALARM_CTRL);
684 /* Switch to interrupt status for intrusion if needed */
685 if (tmp & ALARM_CTRL_RTSACS)
686 w83795_write(client, W83795_REG_ALARM_CTRL,
687 tmp & ~ALARM_CTRL_RTSACS);
688 intrusion = w83795_read(client, W83795_REG_ALARM(5)) & (1 << 6);
689 /* Switch to real-time alarms */
690 w83795_write(client, W83795_REG_ALARM_CTRL, tmp | ALARM_CTRL_RTSACS);
691 for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
692 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
693 data->alarms[5] |= intrusion;
694 /* Restore original configuration if needed */
695 if (!(tmp & ALARM_CTRL_RTSACS))
696 w83795_write(client, W83795_REG_ALARM_CTRL,
697 tmp & ~ALARM_CTRL_RTSACS);
698
699 data->last_updated = jiffies;
700 data->valid = 1;
701
702 END:
703 mutex_unlock(&data->update_lock);
704 return data;
705 }
706
707 /*
708 * Sysfs attributes
709 */
710
711 #define ALARM_STATUS 0
712 #define BEEP_ENABLE 1
713 static ssize_t
show_alarm_beep(struct device * dev,struct device_attribute * attr,char * buf)714 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
715 {
716 struct w83795_data *data = w83795_update_device(dev);
717 struct sensor_device_attribute_2 *sensor_attr =
718 to_sensor_dev_attr_2(attr);
719 int nr = sensor_attr->nr;
720 int index = sensor_attr->index >> 3;
721 int bit = sensor_attr->index & 0x07;
722 u8 val;
723
724 if (nr == ALARM_STATUS)
725 val = (data->alarms[index] >> bit) & 1;
726 else /* BEEP_ENABLE */
727 val = (data->beeps[index] >> bit) & 1;
728
729 return sprintf(buf, "%u\n", val);
730 }
731
732 static ssize_t
store_beep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)733 store_beep(struct device *dev, struct device_attribute *attr,
734 const char *buf, size_t count)
735 {
736 struct i2c_client *client = to_i2c_client(dev);
737 struct w83795_data *data = i2c_get_clientdata(client);
738 struct sensor_device_attribute_2 *sensor_attr =
739 to_sensor_dev_attr_2(attr);
740 int index = sensor_attr->index >> 3;
741 int shift = sensor_attr->index & 0x07;
742 u8 beep_bit = 1 << shift;
743 unsigned long val;
744
745 if (kstrtoul(buf, 10, &val) < 0)
746 return -EINVAL;
747 if (val != 0 && val != 1)
748 return -EINVAL;
749
750 mutex_lock(&data->update_lock);
751 data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
752 data->beeps[index] &= ~beep_bit;
753 data->beeps[index] |= val << shift;
754 w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
755 mutex_unlock(&data->update_lock);
756
757 return count;
758 }
759
760 /* Write 0 to clear chassis alarm */
761 static ssize_t
store_chassis_clear(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)762 store_chassis_clear(struct device *dev,
763 struct device_attribute *attr, const char *buf,
764 size_t count)
765 {
766 struct i2c_client *client = to_i2c_client(dev);
767 struct w83795_data *data = i2c_get_clientdata(client);
768 unsigned long val;
769
770 if (kstrtoul(buf, 10, &val) < 0 || val != 0)
771 return -EINVAL;
772
773 mutex_lock(&data->update_lock);
774 val = w83795_read(client, W83795_REG_CLR_CHASSIS);
775 val |= 0x80;
776 w83795_write(client, W83795_REG_CLR_CHASSIS, val);
777
778 /* Clear status and force cache refresh */
779 w83795_read(client, W83795_REG_ALARM(5));
780 data->valid = 0;
781 mutex_unlock(&data->update_lock);
782 return count;
783 }
784
785 #define FAN_INPUT 0
786 #define FAN_MIN 1
787 static ssize_t
show_fan(struct device * dev,struct device_attribute * attr,char * buf)788 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
789 {
790 struct sensor_device_attribute_2 *sensor_attr =
791 to_sensor_dev_attr_2(attr);
792 int nr = sensor_attr->nr;
793 int index = sensor_attr->index;
794 struct w83795_data *data = w83795_update_device(dev);
795 u16 val;
796
797 if (nr == FAN_INPUT)
798 val = data->fan[index] & 0x0fff;
799 else
800 val = data->fan_min[index] & 0x0fff;
801
802 return sprintf(buf, "%lu\n", fan_from_reg(val));
803 }
804
805 static ssize_t
store_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)806 store_fan_min(struct device *dev, struct device_attribute *attr,
807 const char *buf, size_t count)
808 {
809 struct sensor_device_attribute_2 *sensor_attr =
810 to_sensor_dev_attr_2(attr);
811 int index = sensor_attr->index;
812 struct i2c_client *client = to_i2c_client(dev);
813 struct w83795_data *data = i2c_get_clientdata(client);
814 unsigned long val;
815
816 if (kstrtoul(buf, 10, &val))
817 return -EINVAL;
818 val = fan_to_reg(val);
819
820 mutex_lock(&data->update_lock);
821 data->fan_min[index] = val;
822 w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
823 val &= 0x0f;
824 if (index & 1) {
825 val <<= 4;
826 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
827 & 0x0f;
828 } else {
829 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
830 & 0xf0;
831 }
832 w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
833 mutex_unlock(&data->update_lock);
834
835 return count;
836 }
837
838 static ssize_t
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)839 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
840 {
841 struct w83795_data *data;
842 struct sensor_device_attribute_2 *sensor_attr =
843 to_sensor_dev_attr_2(attr);
844 int nr = sensor_attr->nr;
845 int index = sensor_attr->index;
846 unsigned int val;
847
848 data = nr == PWM_OUTPUT ? w83795_update_device(dev)
849 : w83795_update_pwm_config(dev);
850
851 switch (nr) {
852 case PWM_STOP_TIME:
853 val = time_from_reg(data->pwm[index][nr]);
854 break;
855 case PWM_FREQ:
856 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
857 break;
858 default:
859 val = data->pwm[index][nr];
860 break;
861 }
862
863 return sprintf(buf, "%u\n", val);
864 }
865
866 static ssize_t
store_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)867 store_pwm(struct device *dev, struct device_attribute *attr,
868 const char *buf, size_t count)
869 {
870 struct i2c_client *client = to_i2c_client(dev);
871 struct w83795_data *data = i2c_get_clientdata(client);
872 struct sensor_device_attribute_2 *sensor_attr =
873 to_sensor_dev_attr_2(attr);
874 int nr = sensor_attr->nr;
875 int index = sensor_attr->index;
876 unsigned long val;
877
878 if (kstrtoul(buf, 10, &val) < 0)
879 return -EINVAL;
880
881 mutex_lock(&data->update_lock);
882 switch (nr) {
883 case PWM_STOP_TIME:
884 val = time_to_reg(val);
885 break;
886 case PWM_FREQ:
887 val = pwm_freq_to_reg(val, data->clkin);
888 break;
889 default:
890 val = clamp_val(val, 0, 0xff);
891 break;
892 }
893 w83795_write(client, W83795_REG_PWM(index, nr), val);
894 data->pwm[index][nr] = val;
895 mutex_unlock(&data->update_lock);
896 return count;
897 }
898
899 static ssize_t
show_pwm_enable(struct device * dev,struct device_attribute * attr,char * buf)900 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
901 {
902 struct sensor_device_attribute_2 *sensor_attr =
903 to_sensor_dev_attr_2(attr);
904 struct w83795_data *data = w83795_update_pwm_config(dev);
905 int index = sensor_attr->index;
906 u8 tmp;
907
908 /* Speed cruise mode */
909 if (data->pwm_fcms[0] & (1 << index)) {
910 tmp = 2;
911 goto out;
912 }
913 /* Thermal cruise or SmartFan IV mode */
914 for (tmp = 0; tmp < 6; tmp++) {
915 if (data->pwm_tfmr[tmp] & (1 << index)) {
916 tmp = 3;
917 goto out;
918 }
919 }
920 /* Manual mode */
921 tmp = 1;
922
923 out:
924 return sprintf(buf, "%u\n", tmp);
925 }
926
927 static ssize_t
store_pwm_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)928 store_pwm_enable(struct device *dev, struct device_attribute *attr,
929 const char *buf, size_t count)
930 {
931 struct i2c_client *client = to_i2c_client(dev);
932 struct w83795_data *data = w83795_update_pwm_config(dev);
933 struct sensor_device_attribute_2 *sensor_attr =
934 to_sensor_dev_attr_2(attr);
935 int index = sensor_attr->index;
936 unsigned long val;
937 int i;
938
939 if (kstrtoul(buf, 10, &val) < 0)
940 return -EINVAL;
941 if (val < 1 || val > 2)
942 return -EINVAL;
943
944 #ifndef CONFIG_SENSORS_W83795_FANCTRL
945 if (val > 1) {
946 dev_warn(dev, "Automatic fan speed control support disabled\n");
947 dev_warn(dev, "Build with CONFIG_SENSORS_W83795_FANCTRL=y if you want it\n");
948 return -EOPNOTSUPP;
949 }
950 #endif
951
952 mutex_lock(&data->update_lock);
953 switch (val) {
954 case 1:
955 /* Clear speed cruise mode bits */
956 data->pwm_fcms[0] &= ~(1 << index);
957 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
958 /* Clear thermal cruise mode bits */
959 for (i = 0; i < 6; i++) {
960 data->pwm_tfmr[i] &= ~(1 << index);
961 w83795_write(client, W83795_REG_TFMR(i),
962 data->pwm_tfmr[i]);
963 }
964 break;
965 case 2:
966 data->pwm_fcms[0] |= (1 << index);
967 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
968 break;
969 }
970 mutex_unlock(&data->update_lock);
971 return count;
972 }
973
974 static ssize_t
show_pwm_mode(struct device * dev,struct device_attribute * attr,char * buf)975 show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
976 {
977 struct w83795_data *data = w83795_update_pwm_config(dev);
978 int index = to_sensor_dev_attr_2(attr)->index;
979 unsigned int mode;
980
981 if (data->pwm_fomc & (1 << index))
982 mode = 0; /* DC */
983 else
984 mode = 1; /* PWM */
985
986 return sprintf(buf, "%u\n", mode);
987 }
988
989 /*
990 * Check whether a given temperature source can ever be useful.
991 * Returns the number of selectable temperature channels which are
992 * enabled.
993 */
w83795_tss_useful(const struct w83795_data * data,int tsrc)994 static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
995 {
996 int useful = 0, i;
997
998 for (i = 0; i < 4; i++) {
999 if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
1000 continue;
1001 if (tss_map[i][tsrc] < 6) /* Analog */
1002 useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
1003 else /* Digital */
1004 useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
1005 }
1006
1007 return useful;
1008 }
1009
1010 static ssize_t
show_temp_src(struct device * dev,struct device_attribute * attr,char * buf)1011 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
1012 {
1013 struct sensor_device_attribute_2 *sensor_attr =
1014 to_sensor_dev_attr_2(attr);
1015 struct w83795_data *data = w83795_update_pwm_config(dev);
1016 int index = sensor_attr->index;
1017 u8 tmp = data->temp_src[index / 2];
1018
1019 if (index & 1)
1020 tmp >>= 4; /* Pick high nibble */
1021 else
1022 tmp &= 0x0f; /* Pick low nibble */
1023
1024 /* Look-up the actual temperature channel number */
1025 if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
1026 return -EINVAL; /* Shouldn't happen */
1027
1028 return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
1029 }
1030
1031 static ssize_t
store_temp_src(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1032 store_temp_src(struct device *dev, struct device_attribute *attr,
1033 const char *buf, size_t count)
1034 {
1035 struct i2c_client *client = to_i2c_client(dev);
1036 struct w83795_data *data = w83795_update_pwm_config(dev);
1037 struct sensor_device_attribute_2 *sensor_attr =
1038 to_sensor_dev_attr_2(attr);
1039 int index = sensor_attr->index;
1040 int tmp;
1041 unsigned long channel;
1042 u8 val = index / 2;
1043
1044 if (kstrtoul(buf, 10, &channel) < 0 ||
1045 channel < 1 || channel > 14)
1046 return -EINVAL;
1047
1048 /* Check if request can be fulfilled */
1049 for (tmp = 0; tmp < 4; tmp++) {
1050 if (tss_map[tmp][index] == channel - 1)
1051 break;
1052 }
1053 if (tmp == 4) /* No match */
1054 return -EINVAL;
1055
1056 mutex_lock(&data->update_lock);
1057 if (index & 1) {
1058 tmp <<= 4;
1059 data->temp_src[val] &= 0x0f;
1060 } else {
1061 data->temp_src[val] &= 0xf0;
1062 }
1063 data->temp_src[val] |= tmp;
1064 w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
1065 mutex_unlock(&data->update_lock);
1066
1067 return count;
1068 }
1069
1070 #define TEMP_PWM_ENABLE 0
1071 #define TEMP_PWM_FAN_MAP 1
1072 static ssize_t
show_temp_pwm_enable(struct device * dev,struct device_attribute * attr,char * buf)1073 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1074 char *buf)
1075 {
1076 struct w83795_data *data = w83795_update_pwm_config(dev);
1077 struct sensor_device_attribute_2 *sensor_attr =
1078 to_sensor_dev_attr_2(attr);
1079 int nr = sensor_attr->nr;
1080 int index = sensor_attr->index;
1081 u8 tmp = 0xff;
1082
1083 switch (nr) {
1084 case TEMP_PWM_ENABLE:
1085 tmp = (data->pwm_fcms[1] >> index) & 1;
1086 if (tmp)
1087 tmp = 4;
1088 else
1089 tmp = 3;
1090 break;
1091 case TEMP_PWM_FAN_MAP:
1092 tmp = data->pwm_tfmr[index];
1093 break;
1094 }
1095
1096 return sprintf(buf, "%u\n", tmp);
1097 }
1098
1099 static ssize_t
store_temp_pwm_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1100 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1101 const char *buf, size_t count)
1102 {
1103 struct i2c_client *client = to_i2c_client(dev);
1104 struct w83795_data *data = w83795_update_pwm_config(dev);
1105 struct sensor_device_attribute_2 *sensor_attr =
1106 to_sensor_dev_attr_2(attr);
1107 int nr = sensor_attr->nr;
1108 int index = sensor_attr->index;
1109 unsigned long tmp;
1110
1111 if (kstrtoul(buf, 10, &tmp) < 0)
1112 return -EINVAL;
1113
1114 switch (nr) {
1115 case TEMP_PWM_ENABLE:
1116 if (tmp != 3 && tmp != 4)
1117 return -EINVAL;
1118 tmp -= 3;
1119 mutex_lock(&data->update_lock);
1120 data->pwm_fcms[1] &= ~(1 << index);
1121 data->pwm_fcms[1] |= tmp << index;
1122 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1123 mutex_unlock(&data->update_lock);
1124 break;
1125 case TEMP_PWM_FAN_MAP:
1126 mutex_lock(&data->update_lock);
1127 tmp = clamp_val(tmp, 0, 0xff);
1128 w83795_write(client, W83795_REG_TFMR(index), tmp);
1129 data->pwm_tfmr[index] = tmp;
1130 mutex_unlock(&data->update_lock);
1131 break;
1132 }
1133 return count;
1134 }
1135
1136 #define FANIN_TARGET 0
1137 #define FANIN_TOL 1
1138 static ssize_t
show_fanin(struct device * dev,struct device_attribute * attr,char * buf)1139 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1140 {
1141 struct w83795_data *data = w83795_update_pwm_config(dev);
1142 struct sensor_device_attribute_2 *sensor_attr =
1143 to_sensor_dev_attr_2(attr);
1144 int nr = sensor_attr->nr;
1145 int index = sensor_attr->index;
1146 u16 tmp = 0;
1147
1148 switch (nr) {
1149 case FANIN_TARGET:
1150 tmp = fan_from_reg(data->target_speed[index]);
1151 break;
1152 case FANIN_TOL:
1153 tmp = data->tol_speed;
1154 break;
1155 }
1156
1157 return sprintf(buf, "%u\n", tmp);
1158 }
1159
1160 static ssize_t
store_fanin(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1161 store_fanin(struct device *dev, struct device_attribute *attr,
1162 const char *buf, size_t count)
1163 {
1164 struct i2c_client *client = to_i2c_client(dev);
1165 struct w83795_data *data = i2c_get_clientdata(client);
1166 struct sensor_device_attribute_2 *sensor_attr =
1167 to_sensor_dev_attr_2(attr);
1168 int nr = sensor_attr->nr;
1169 int index = sensor_attr->index;
1170 unsigned long val;
1171
1172 if (kstrtoul(buf, 10, &val) < 0)
1173 return -EINVAL;
1174
1175 mutex_lock(&data->update_lock);
1176 switch (nr) {
1177 case FANIN_TARGET:
1178 val = fan_to_reg(clamp_val(val, 0, 0xfff));
1179 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1180 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1181 data->target_speed[index] = val;
1182 break;
1183 case FANIN_TOL:
1184 val = clamp_val(val, 0, 0x3f);
1185 w83795_write(client, W83795_REG_TFTS, val);
1186 data->tol_speed = val;
1187 break;
1188 }
1189 mutex_unlock(&data->update_lock);
1190
1191 return count;
1192 }
1193
1194
1195 static ssize_t
show_temp_pwm(struct device * dev,struct device_attribute * attr,char * buf)1196 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1197 {
1198 struct w83795_data *data = w83795_update_pwm_config(dev);
1199 struct sensor_device_attribute_2 *sensor_attr =
1200 to_sensor_dev_attr_2(attr);
1201 int nr = sensor_attr->nr;
1202 int index = sensor_attr->index;
1203 long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1204
1205 return sprintf(buf, "%ld\n", tmp);
1206 }
1207
1208 static ssize_t
store_temp_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1209 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1210 const char *buf, size_t count)
1211 {
1212 struct i2c_client *client = to_i2c_client(dev);
1213 struct w83795_data *data = i2c_get_clientdata(client);
1214 struct sensor_device_attribute_2 *sensor_attr =
1215 to_sensor_dev_attr_2(attr);
1216 int nr = sensor_attr->nr;
1217 int index = sensor_attr->index;
1218 unsigned long val;
1219 u8 tmp;
1220
1221 if (kstrtoul(buf, 10, &val) < 0)
1222 return -EINVAL;
1223 val /= 1000;
1224
1225 mutex_lock(&data->update_lock);
1226 switch (nr) {
1227 case TEMP_PWM_TTTI:
1228 val = clamp_val(val, 0, 0x7f);
1229 w83795_write(client, W83795_REG_TTTI(index), val);
1230 break;
1231 case TEMP_PWM_CTFS:
1232 val = clamp_val(val, 0, 0x7f);
1233 w83795_write(client, W83795_REG_CTFS(index), val);
1234 break;
1235 case TEMP_PWM_HCT:
1236 val = clamp_val(val, 0, 0x0f);
1237 tmp = w83795_read(client, W83795_REG_HT(index));
1238 tmp &= 0x0f;
1239 tmp |= (val << 4) & 0xf0;
1240 w83795_write(client, W83795_REG_HT(index), tmp);
1241 break;
1242 case TEMP_PWM_HOT:
1243 val = clamp_val(val, 0, 0x0f);
1244 tmp = w83795_read(client, W83795_REG_HT(index));
1245 tmp &= 0xf0;
1246 tmp |= val & 0x0f;
1247 w83795_write(client, W83795_REG_HT(index), tmp);
1248 break;
1249 }
1250 data->pwm_temp[index][nr] = val;
1251 mutex_unlock(&data->update_lock);
1252
1253 return count;
1254 }
1255
1256 static ssize_t
show_sf4_pwm(struct device * dev,struct device_attribute * attr,char * buf)1257 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1258 {
1259 struct w83795_data *data = w83795_update_pwm_config(dev);
1260 struct sensor_device_attribute_2 *sensor_attr =
1261 to_sensor_dev_attr_2(attr);
1262 int nr = sensor_attr->nr;
1263 int index = sensor_attr->index;
1264
1265 return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1266 }
1267
1268 static ssize_t
store_sf4_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1269 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1270 const char *buf, size_t count)
1271 {
1272 struct i2c_client *client = to_i2c_client(dev);
1273 struct w83795_data *data = i2c_get_clientdata(client);
1274 struct sensor_device_attribute_2 *sensor_attr =
1275 to_sensor_dev_attr_2(attr);
1276 int nr = sensor_attr->nr;
1277 int index = sensor_attr->index;
1278 unsigned long val;
1279
1280 if (kstrtoul(buf, 10, &val) < 0)
1281 return -EINVAL;
1282
1283 mutex_lock(&data->update_lock);
1284 w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1285 data->sf4_reg[index][SF4_PWM][nr] = val;
1286 mutex_unlock(&data->update_lock);
1287
1288 return count;
1289 }
1290
1291 static ssize_t
show_sf4_temp(struct device * dev,struct device_attribute * attr,char * buf)1292 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1293 {
1294 struct w83795_data *data = w83795_update_pwm_config(dev);
1295 struct sensor_device_attribute_2 *sensor_attr =
1296 to_sensor_dev_attr_2(attr);
1297 int nr = sensor_attr->nr;
1298 int index = sensor_attr->index;
1299
1300 return sprintf(buf, "%u\n",
1301 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1302 }
1303
1304 static ssize_t
store_sf4_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1305 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1306 const char *buf, size_t count)
1307 {
1308 struct i2c_client *client = to_i2c_client(dev);
1309 struct w83795_data *data = i2c_get_clientdata(client);
1310 struct sensor_device_attribute_2 *sensor_attr =
1311 to_sensor_dev_attr_2(attr);
1312 int nr = sensor_attr->nr;
1313 int index = sensor_attr->index;
1314 unsigned long val;
1315
1316 if (kstrtoul(buf, 10, &val) < 0)
1317 return -EINVAL;
1318 val /= 1000;
1319
1320 mutex_lock(&data->update_lock);
1321 w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1322 data->sf4_reg[index][SF4_TEMP][nr] = val;
1323 mutex_unlock(&data->update_lock);
1324
1325 return count;
1326 }
1327
1328
1329 static ssize_t
show_temp(struct device * dev,struct device_attribute * attr,char * buf)1330 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1331 {
1332 struct sensor_device_attribute_2 *sensor_attr =
1333 to_sensor_dev_attr_2(attr);
1334 int nr = sensor_attr->nr;
1335 int index = sensor_attr->index;
1336 struct w83795_data *data = w83795_update_device(dev);
1337 long temp = temp_from_reg(data->temp[index][nr]);
1338
1339 if (nr == TEMP_READ)
1340 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1341 return sprintf(buf, "%ld\n", temp);
1342 }
1343
1344 static ssize_t
store_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1345 store_temp(struct device *dev, struct device_attribute *attr,
1346 const char *buf, size_t count)
1347 {
1348 struct sensor_device_attribute_2 *sensor_attr =
1349 to_sensor_dev_attr_2(attr);
1350 int nr = sensor_attr->nr;
1351 int index = sensor_attr->index;
1352 struct i2c_client *client = to_i2c_client(dev);
1353 struct w83795_data *data = i2c_get_clientdata(client);
1354 long tmp;
1355
1356 if (kstrtol(buf, 10, &tmp) < 0)
1357 return -EINVAL;
1358
1359 mutex_lock(&data->update_lock);
1360 data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1361 w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1362 mutex_unlock(&data->update_lock);
1363 return count;
1364 }
1365
1366
1367 static ssize_t
show_dts_mode(struct device * dev,struct device_attribute * attr,char * buf)1368 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1369 {
1370 struct w83795_data *data = dev_get_drvdata(dev);
1371 int tmp;
1372
1373 if (data->enable_dts & 2)
1374 tmp = 5;
1375 else
1376 tmp = 6;
1377
1378 return sprintf(buf, "%d\n", tmp);
1379 }
1380
1381 static ssize_t
show_dts(struct device * dev,struct device_attribute * attr,char * buf)1382 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1383 {
1384 struct sensor_device_attribute_2 *sensor_attr =
1385 to_sensor_dev_attr_2(attr);
1386 int index = sensor_attr->index;
1387 struct w83795_data *data = w83795_update_device(dev);
1388 long temp = temp_from_reg(data->dts[index]);
1389
1390 temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1391 return sprintf(buf, "%ld\n", temp);
1392 }
1393
1394 static ssize_t
show_dts_ext(struct device * dev,struct device_attribute * attr,char * buf)1395 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1396 {
1397 struct sensor_device_attribute_2 *sensor_attr =
1398 to_sensor_dev_attr_2(attr);
1399 int nr = sensor_attr->nr;
1400 struct w83795_data *data = dev_get_drvdata(dev);
1401 long temp = temp_from_reg(data->dts_ext[nr]);
1402
1403 return sprintf(buf, "%ld\n", temp);
1404 }
1405
1406 static ssize_t
store_dts_ext(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1407 store_dts_ext(struct device *dev, struct device_attribute *attr,
1408 const char *buf, size_t count)
1409 {
1410 struct sensor_device_attribute_2 *sensor_attr =
1411 to_sensor_dev_attr_2(attr);
1412 int nr = sensor_attr->nr;
1413 struct i2c_client *client = to_i2c_client(dev);
1414 struct w83795_data *data = i2c_get_clientdata(client);
1415 long tmp;
1416
1417 if (kstrtol(buf, 10, &tmp) < 0)
1418 return -EINVAL;
1419
1420 mutex_lock(&data->update_lock);
1421 data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1422 w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1423 mutex_unlock(&data->update_lock);
1424 return count;
1425 }
1426
1427
1428 static ssize_t
show_temp_mode(struct device * dev,struct device_attribute * attr,char * buf)1429 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1430 {
1431 struct w83795_data *data = dev_get_drvdata(dev);
1432 struct sensor_device_attribute_2 *sensor_attr =
1433 to_sensor_dev_attr_2(attr);
1434 int index = sensor_attr->index;
1435 int tmp;
1436
1437 if (data->temp_mode & (1 << index))
1438 tmp = 3; /* Thermal diode */
1439 else
1440 tmp = 4; /* Thermistor */
1441
1442 return sprintf(buf, "%d\n", tmp);
1443 }
1444
1445 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1446 static ssize_t
store_temp_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1447 store_temp_mode(struct device *dev, struct device_attribute *attr,
1448 const char *buf, size_t count)
1449 {
1450 struct i2c_client *client = to_i2c_client(dev);
1451 struct w83795_data *data = i2c_get_clientdata(client);
1452 struct sensor_device_attribute_2 *sensor_attr =
1453 to_sensor_dev_attr_2(attr);
1454 int index = sensor_attr->index;
1455 int reg_shift;
1456 unsigned long val;
1457 u8 tmp;
1458
1459 if (kstrtoul(buf, 10, &val) < 0)
1460 return -EINVAL;
1461 if ((val != 4) && (val != 3))
1462 return -EINVAL;
1463
1464 mutex_lock(&data->update_lock);
1465 if (val == 3) {
1466 /* Thermal diode */
1467 val = 0x01;
1468 data->temp_mode |= 1 << index;
1469 } else if (val == 4) {
1470 /* Thermistor */
1471 val = 0x03;
1472 data->temp_mode &= ~(1 << index);
1473 }
1474
1475 reg_shift = 2 * index;
1476 tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1477 tmp &= ~(0x03 << reg_shift);
1478 tmp |= val << reg_shift;
1479 w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1480
1481 mutex_unlock(&data->update_lock);
1482 return count;
1483 }
1484
1485
1486 /* show/store VIN */
1487 static ssize_t
show_in(struct device * dev,struct device_attribute * attr,char * buf)1488 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1489 {
1490 struct sensor_device_attribute_2 *sensor_attr =
1491 to_sensor_dev_attr_2(attr);
1492 int nr = sensor_attr->nr;
1493 int index = sensor_attr->index;
1494 struct w83795_data *data = w83795_update_device(dev);
1495 u16 val = data->in[index][nr];
1496 u8 lsb_idx;
1497
1498 switch (nr) {
1499 case IN_READ:
1500 /* calculate this value again by sensors as sensors3.conf */
1501 if ((index >= 17) &&
1502 !((data->has_gain >> (index - 17)) & 1))
1503 val *= 8;
1504 break;
1505 case IN_MAX:
1506 case IN_LOW:
1507 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1508 val <<= 2;
1509 val |= (data->in_lsb[lsb_idx][nr] >>
1510 IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1511 if ((index >= 17) &&
1512 !((data->has_gain >> (index - 17)) & 1))
1513 val *= 8;
1514 break;
1515 }
1516 val = in_from_reg(index, val);
1517
1518 return sprintf(buf, "%d\n", val);
1519 }
1520
1521 static ssize_t
store_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1522 store_in(struct device *dev, struct device_attribute *attr,
1523 const char *buf, size_t count)
1524 {
1525 struct sensor_device_attribute_2 *sensor_attr =
1526 to_sensor_dev_attr_2(attr);
1527 int nr = sensor_attr->nr;
1528 int index = sensor_attr->index;
1529 struct i2c_client *client = to_i2c_client(dev);
1530 struct w83795_data *data = i2c_get_clientdata(client);
1531 unsigned long val;
1532 u8 tmp;
1533 u8 lsb_idx;
1534
1535 if (kstrtoul(buf, 10, &val) < 0)
1536 return -EINVAL;
1537 val = in_to_reg(index, val);
1538
1539 if ((index >= 17) &&
1540 !((data->has_gain >> (index - 17)) & 1))
1541 val /= 8;
1542 val = clamp_val(val, 0, 0x3FF);
1543 mutex_lock(&data->update_lock);
1544
1545 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1546 tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1547 tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1548 tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1549 w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1550 data->in_lsb[lsb_idx][nr] = tmp;
1551
1552 tmp = (val >> 2) & 0xff;
1553 w83795_write(client, W83795_REG_IN[index][nr], tmp);
1554 data->in[index][nr] = tmp;
1555
1556 mutex_unlock(&data->update_lock);
1557 return count;
1558 }
1559
1560
1561 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1562 static ssize_t
show_sf_setup(struct device * dev,struct device_attribute * attr,char * buf)1563 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1564 {
1565 struct sensor_device_attribute_2 *sensor_attr =
1566 to_sensor_dev_attr_2(attr);
1567 int nr = sensor_attr->nr;
1568 struct w83795_data *data = w83795_update_pwm_config(dev);
1569 u16 val = data->setup_pwm[nr];
1570
1571 switch (nr) {
1572 case SETUP_PWM_UPTIME:
1573 case SETUP_PWM_DOWNTIME:
1574 val = time_from_reg(val);
1575 break;
1576 }
1577
1578 return sprintf(buf, "%d\n", val);
1579 }
1580
1581 static ssize_t
store_sf_setup(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1582 store_sf_setup(struct device *dev, struct device_attribute *attr,
1583 const char *buf, size_t count)
1584 {
1585 struct sensor_device_attribute_2 *sensor_attr =
1586 to_sensor_dev_attr_2(attr);
1587 int nr = sensor_attr->nr;
1588 struct i2c_client *client = to_i2c_client(dev);
1589 struct w83795_data *data = i2c_get_clientdata(client);
1590 unsigned long val;
1591
1592 if (kstrtoul(buf, 10, &val) < 0)
1593 return -EINVAL;
1594
1595 switch (nr) {
1596 case SETUP_PWM_DEFAULT:
1597 val = clamp_val(val, 0, 0xff);
1598 break;
1599 case SETUP_PWM_UPTIME:
1600 case SETUP_PWM_DOWNTIME:
1601 val = time_to_reg(val);
1602 if (val == 0)
1603 return -EINVAL;
1604 break;
1605 }
1606
1607 mutex_lock(&data->update_lock);
1608 data->setup_pwm[nr] = val;
1609 w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1610 mutex_unlock(&data->update_lock);
1611 return count;
1612 }
1613 #endif
1614
1615
1616 #define NOT_USED -1
1617
1618 /*
1619 * Don't change the attribute order, _max, _min and _beep are accessed by index
1620 * somewhere else in the code
1621 */
1622 #define SENSOR_ATTR_IN(index) { \
1623 SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \
1624 IN_READ, index), \
1625 SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in, \
1626 store_in, IN_MAX, index), \
1627 SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in, \
1628 store_in, IN_LOW, index), \
1629 SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep, \
1630 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1631 SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO, \
1632 show_alarm_beep, store_beep, BEEP_ENABLE, \
1633 index + ((index > 14) ? 1 : 0)) }
1634
1635 /*
1636 * Don't change the attribute order, _beep is accessed by index
1637 * somewhere else in the code
1638 */
1639 #define SENSOR_ATTR_FAN(index) { \
1640 SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan, \
1641 NULL, FAN_INPUT, index - 1), \
1642 SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO, \
1643 show_fan, store_fan_min, FAN_MIN, index - 1), \
1644 SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep, \
1645 NULL, ALARM_STATUS, index + 31), \
1646 SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO, \
1647 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1648
1649 #define SENSOR_ATTR_PWM(index) { \
1650 SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm, \
1651 store_pwm, PWM_OUTPUT, index - 1), \
1652 SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO, \
1653 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1654 SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO, \
1655 show_pwm_mode, NULL, NOT_USED, index - 1), \
1656 SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO, \
1657 show_pwm, store_pwm, PWM_FREQ, index - 1), \
1658 SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO, \
1659 show_pwm, store_pwm, PWM_NONSTOP, index - 1), \
1660 SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO, \
1661 show_pwm, store_pwm, PWM_START, index - 1), \
1662 SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO, \
1663 show_pwm, store_pwm, PWM_STOP_TIME, index - 1), \
1664 SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1665 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1666
1667 /*
1668 * Don't change the attribute order, _beep is accessed by index
1669 * somewhere else in the code
1670 */
1671 #define SENSOR_ATTR_DTS(index) { \
1672 SENSOR_ATTR_2(temp##index##_type, S_IRUGO , \
1673 show_dts_mode, NULL, NOT_USED, index - 7), \
1674 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts, \
1675 NULL, NOT_USED, index - 7), \
1676 SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1677 store_dts_ext, DTS_CRIT, NOT_USED), \
1678 SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR, \
1679 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED), \
1680 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1681 store_dts_ext, DTS_WARN, NOT_USED), \
1682 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1683 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED), \
1684 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1685 show_alarm_beep, NULL, ALARM_STATUS, index + 17), \
1686 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1687 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1688
1689 /*
1690 * Don't change the attribute order, _beep is accessed by index
1691 * somewhere else in the code
1692 */
1693 #define SENSOR_ATTR_TEMP(index) { \
1694 SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1695 show_temp_mode, store_temp_mode, NOT_USED, index - 1), \
1696 SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp, \
1697 NULL, TEMP_READ, index - 1), \
1698 SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1699 store_temp, TEMP_CRIT, index - 1), \
1700 SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR, \
1701 show_temp, store_temp, TEMP_CRIT_HYST, index - 1), \
1702 SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp, \
1703 store_temp, TEMP_WARN, index - 1), \
1704 SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR, \
1705 show_temp, store_temp, TEMP_WARN_HYST, index - 1), \
1706 SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO, \
1707 show_alarm_beep, NULL, ALARM_STATUS, \
1708 index + (index > 4 ? 11 : 17)), \
1709 SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO, \
1710 show_alarm_beep, store_beep, BEEP_ENABLE, \
1711 index + (index > 4 ? 11 : 17)), \
1712 SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO, \
1713 show_temp_pwm_enable, store_temp_pwm_enable, \
1714 TEMP_PWM_ENABLE, index - 1), \
1715 SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1716 show_temp_pwm_enable, store_temp_pwm_enable, \
1717 TEMP_PWM_FAN_MAP, index - 1), \
1718 SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO, \
1719 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1720 SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO, \
1721 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1722 SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO, \
1723 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1724 SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO, \
1725 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1726 SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1727 show_sf4_pwm, store_sf4_pwm, 0, index - 1), \
1728 SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1729 show_sf4_pwm, store_sf4_pwm, 1, index - 1), \
1730 SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1731 show_sf4_pwm, store_sf4_pwm, 2, index - 1), \
1732 SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1733 show_sf4_pwm, store_sf4_pwm, 3, index - 1), \
1734 SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1735 show_sf4_pwm, store_sf4_pwm, 4, index - 1), \
1736 SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1737 show_sf4_pwm, store_sf4_pwm, 5, index - 1), \
1738 SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1739 show_sf4_pwm, store_sf4_pwm, 6, index - 1), \
1740 SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1741 show_sf4_temp, store_sf4_temp, 0, index - 1), \
1742 SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1743 show_sf4_temp, store_sf4_temp, 1, index - 1), \
1744 SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1745 show_sf4_temp, store_sf4_temp, 2, index - 1), \
1746 SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1747 show_sf4_temp, store_sf4_temp, 3, index - 1), \
1748 SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1749 show_sf4_temp, store_sf4_temp, 4, index - 1), \
1750 SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1751 show_sf4_temp, store_sf4_temp, 5, index - 1), \
1752 SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1753 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1754
1755
1756 static struct sensor_device_attribute_2 w83795_in[][5] = {
1757 SENSOR_ATTR_IN(0),
1758 SENSOR_ATTR_IN(1),
1759 SENSOR_ATTR_IN(2),
1760 SENSOR_ATTR_IN(3),
1761 SENSOR_ATTR_IN(4),
1762 SENSOR_ATTR_IN(5),
1763 SENSOR_ATTR_IN(6),
1764 SENSOR_ATTR_IN(7),
1765 SENSOR_ATTR_IN(8),
1766 SENSOR_ATTR_IN(9),
1767 SENSOR_ATTR_IN(10),
1768 SENSOR_ATTR_IN(11),
1769 SENSOR_ATTR_IN(12),
1770 SENSOR_ATTR_IN(13),
1771 SENSOR_ATTR_IN(14),
1772 SENSOR_ATTR_IN(15),
1773 SENSOR_ATTR_IN(16),
1774 SENSOR_ATTR_IN(17),
1775 SENSOR_ATTR_IN(18),
1776 SENSOR_ATTR_IN(19),
1777 SENSOR_ATTR_IN(20),
1778 };
1779
1780 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1781 SENSOR_ATTR_FAN(1),
1782 SENSOR_ATTR_FAN(2),
1783 SENSOR_ATTR_FAN(3),
1784 SENSOR_ATTR_FAN(4),
1785 SENSOR_ATTR_FAN(5),
1786 SENSOR_ATTR_FAN(6),
1787 SENSOR_ATTR_FAN(7),
1788 SENSOR_ATTR_FAN(8),
1789 SENSOR_ATTR_FAN(9),
1790 SENSOR_ATTR_FAN(10),
1791 SENSOR_ATTR_FAN(11),
1792 SENSOR_ATTR_FAN(12),
1793 SENSOR_ATTR_FAN(13),
1794 SENSOR_ATTR_FAN(14),
1795 };
1796
1797 static const struct sensor_device_attribute_2 w83795_temp[][28] = {
1798 SENSOR_ATTR_TEMP(1),
1799 SENSOR_ATTR_TEMP(2),
1800 SENSOR_ATTR_TEMP(3),
1801 SENSOR_ATTR_TEMP(4),
1802 SENSOR_ATTR_TEMP(5),
1803 SENSOR_ATTR_TEMP(6),
1804 };
1805
1806 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1807 SENSOR_ATTR_DTS(7),
1808 SENSOR_ATTR_DTS(8),
1809 SENSOR_ATTR_DTS(9),
1810 SENSOR_ATTR_DTS(10),
1811 SENSOR_ATTR_DTS(11),
1812 SENSOR_ATTR_DTS(12),
1813 SENSOR_ATTR_DTS(13),
1814 SENSOR_ATTR_DTS(14),
1815 };
1816
1817 static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
1818 SENSOR_ATTR_PWM(1),
1819 SENSOR_ATTR_PWM(2),
1820 SENSOR_ATTR_PWM(3),
1821 SENSOR_ATTR_PWM(4),
1822 SENSOR_ATTR_PWM(5),
1823 SENSOR_ATTR_PWM(6),
1824 SENSOR_ATTR_PWM(7),
1825 SENSOR_ATTR_PWM(8),
1826 };
1827
1828 static const struct sensor_device_attribute_2 w83795_tss[6] = {
1829 SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
1830 show_temp_src, store_temp_src, NOT_USED, 0),
1831 SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
1832 show_temp_src, store_temp_src, NOT_USED, 1),
1833 SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
1834 show_temp_src, store_temp_src, NOT_USED, 2),
1835 SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
1836 show_temp_src, store_temp_src, NOT_USED, 3),
1837 SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
1838 show_temp_src, store_temp_src, NOT_USED, 4),
1839 SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
1840 show_temp_src, store_temp_src, NOT_USED, 5),
1841 };
1842
1843 static const struct sensor_device_attribute_2 sda_single_files[] = {
1844 SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1845 store_chassis_clear, ALARM_STATUS, 46),
1846 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1847 SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1848 store_fanin, FANIN_TOL, NOT_USED),
1849 SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1850 store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1851 SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1852 store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1853 SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1854 store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1855 #endif
1856 };
1857
1858 static const struct sensor_device_attribute_2 sda_beep_files[] = {
1859 SENSOR_ATTR_2(intrusion0_beep, S_IWUSR | S_IRUGO, show_alarm_beep,
1860 store_beep, BEEP_ENABLE, 46),
1861 SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1862 store_beep, BEEP_ENABLE, 47),
1863 };
1864
1865 /*
1866 * Driver interface
1867 */
1868
w83795_init_client(struct i2c_client * client)1869 static void w83795_init_client(struct i2c_client *client)
1870 {
1871 struct w83795_data *data = i2c_get_clientdata(client);
1872 static const u16 clkin[4] = { /* in kHz */
1873 14318, 24000, 33333, 48000
1874 };
1875 u8 config;
1876
1877 if (reset)
1878 w83795_write(client, W83795_REG_CONFIG, 0x80);
1879
1880 /* Start monitoring if needed */
1881 config = w83795_read(client, W83795_REG_CONFIG);
1882 if (!(config & W83795_REG_CONFIG_START)) {
1883 dev_info(&client->dev, "Enabling monitoring operations\n");
1884 w83795_write(client, W83795_REG_CONFIG,
1885 config | W83795_REG_CONFIG_START);
1886 }
1887
1888 data->clkin = clkin[(config >> 3) & 0x3];
1889 dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1890 }
1891
w83795_get_device_id(struct i2c_client * client)1892 static int w83795_get_device_id(struct i2c_client *client)
1893 {
1894 int device_id;
1895
1896 device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1897
1898 /*
1899 * Special case for rev. A chips; can't be checked first because later
1900 * revisions emulate this for compatibility
1901 */
1902 if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1903 int alt_id;
1904
1905 alt_id = i2c_smbus_read_byte_data(client,
1906 W83795_REG_DEVICEID_A);
1907 if (alt_id == 0x50)
1908 device_id = alt_id;
1909 }
1910
1911 return device_id;
1912 }
1913
1914 /* Return 0 if detection is successful, -ENODEV otherwise */
w83795_detect(struct i2c_client * client,struct i2c_board_info * info)1915 static int w83795_detect(struct i2c_client *client,
1916 struct i2c_board_info *info)
1917 {
1918 int bank, vendor_id, device_id, expected, i2c_addr, config;
1919 struct i2c_adapter *adapter = client->adapter;
1920 unsigned short address = client->addr;
1921 const char *chip_name;
1922
1923 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1924 return -ENODEV;
1925 bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1926 if (bank < 0 || (bank & 0x7c)) {
1927 dev_dbg(&adapter->dev,
1928 "w83795: Detection failed at addr 0x%02hx, check %s\n",
1929 address, "bank");
1930 return -ENODEV;
1931 }
1932
1933 /* Check Nuvoton vendor ID */
1934 vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1935 expected = bank & 0x80 ? 0x5c : 0xa3;
1936 if (vendor_id != expected) {
1937 dev_dbg(&adapter->dev,
1938 "w83795: Detection failed at addr 0x%02hx, check %s\n",
1939 address, "vendor id");
1940 return -ENODEV;
1941 }
1942
1943 /* Check device ID */
1944 device_id = w83795_get_device_id(client) |
1945 (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1946 if ((device_id >> 4) != 0x795) {
1947 dev_dbg(&adapter->dev,
1948 "w83795: Detection failed at addr 0x%02hx, check %s\n",
1949 address, "device id\n");
1950 return -ENODEV;
1951 }
1952
1953 /*
1954 * If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1955 * should match
1956 */
1957 if ((bank & 0x07) == 0) {
1958 i2c_addr = i2c_smbus_read_byte_data(client,
1959 W83795_REG_I2C_ADDR);
1960 if ((i2c_addr & 0x7f) != address) {
1961 dev_dbg(&adapter->dev,
1962 "w83795: Detection failed at addr 0x%02hx, "
1963 "check %s\n", address, "i2c addr");
1964 return -ENODEV;
1965 }
1966 }
1967
1968 /*
1969 * Check 795 chip type: 795G or 795ADG
1970 * Usually we don't write to chips during detection, but here we don't
1971 * quite have the choice; hopefully it's OK, we are about to return
1972 * success anyway
1973 */
1974 if ((bank & 0x07) != 0)
1975 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1976 bank & ~0x07);
1977 config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1978 if (config & W83795_REG_CONFIG_CONFIG48)
1979 chip_name = "w83795adg";
1980 else
1981 chip_name = "w83795g";
1982
1983 strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1984 dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1985 'A' + (device_id & 0xf), address);
1986
1987 return 0;
1988 }
1989
1990 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1991 #define NUM_PWM_ATTRIBUTES ARRAY_SIZE(w83795_pwm[0])
1992 #define NUM_TEMP_ATTRIBUTES ARRAY_SIZE(w83795_temp[0])
1993 #else
1994 #define NUM_PWM_ATTRIBUTES 4
1995 #define NUM_TEMP_ATTRIBUTES 8
1996 #endif
1997
w83795_handle_files(struct device * dev,int (* fn)(struct device *,const struct device_attribute *))1998 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1999 const struct device_attribute *))
2000 {
2001 struct w83795_data *data = dev_get_drvdata(dev);
2002 int err, i, j;
2003
2004 for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
2005 if (!(data->has_in & (1 << i)))
2006 continue;
2007 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
2008 if (j == 4 && !data->enable_beep)
2009 continue;
2010 err = fn(dev, &w83795_in[i][j].dev_attr);
2011 if (err)
2012 return err;
2013 }
2014 }
2015
2016 for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
2017 if (!(data->has_fan & (1 << i)))
2018 continue;
2019 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
2020 if (j == 3 && !data->enable_beep)
2021 continue;
2022 err = fn(dev, &w83795_fan[i][j].dev_attr);
2023 if (err)
2024 return err;
2025 }
2026 }
2027
2028 for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
2029 j = w83795_tss_useful(data, i);
2030 if (!j)
2031 continue;
2032 err = fn(dev, &w83795_tss[i].dev_attr);
2033 if (err)
2034 return err;
2035 }
2036
2037 for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
2038 err = fn(dev, &sda_single_files[i].dev_attr);
2039 if (err)
2040 return err;
2041 }
2042
2043 if (data->enable_beep) {
2044 for (i = 0; i < ARRAY_SIZE(sda_beep_files); i++) {
2045 err = fn(dev, &sda_beep_files[i].dev_attr);
2046 if (err)
2047 return err;
2048 }
2049 }
2050
2051 for (i = 0; i < data->has_pwm; i++) {
2052 for (j = 0; j < NUM_PWM_ATTRIBUTES; j++) {
2053 err = fn(dev, &w83795_pwm[i][j].dev_attr);
2054 if (err)
2055 return err;
2056 }
2057 }
2058
2059 for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
2060 if (!(data->has_temp & (1 << i)))
2061 continue;
2062 for (j = 0; j < NUM_TEMP_ATTRIBUTES; j++) {
2063 if (j == 7 && !data->enable_beep)
2064 continue;
2065 err = fn(dev, &w83795_temp[i][j].dev_attr);
2066 if (err)
2067 return err;
2068 }
2069 }
2070
2071 if (data->enable_dts) {
2072 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
2073 if (!(data->has_dts & (1 << i)))
2074 continue;
2075 for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
2076 if (j == 7 && !data->enable_beep)
2077 continue;
2078 err = fn(dev, &w83795_dts[i][j].dev_attr);
2079 if (err)
2080 return err;
2081 }
2082 }
2083 }
2084
2085 return 0;
2086 }
2087
2088 /* We need a wrapper that fits in w83795_handle_files */
device_remove_file_wrapper(struct device * dev,const struct device_attribute * attr)2089 static int device_remove_file_wrapper(struct device *dev,
2090 const struct device_attribute *attr)
2091 {
2092 device_remove_file(dev, attr);
2093 return 0;
2094 }
2095
w83795_check_dynamic_in_limits(struct i2c_client * client)2096 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
2097 {
2098 struct w83795_data *data = i2c_get_clientdata(client);
2099 u8 vid_ctl;
2100 int i, err_max, err_min;
2101
2102 vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
2103
2104 /* Return immediately if VRM isn't configured */
2105 if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
2106 return;
2107
2108 data->has_dyn_in = (vid_ctl >> 3) & 0x07;
2109 for (i = 0; i < 2; i++) {
2110 if (!(data->has_dyn_in & (1 << i)))
2111 continue;
2112
2113 /* Voltage limits in dynamic mode, switch to read-only */
2114 err_max = sysfs_chmod_file(&client->dev.kobj,
2115 &w83795_in[i][2].dev_attr.attr,
2116 S_IRUGO);
2117 err_min = sysfs_chmod_file(&client->dev.kobj,
2118 &w83795_in[i][3].dev_attr.attr,
2119 S_IRUGO);
2120 if (err_max || err_min)
2121 dev_warn(&client->dev,
2122 "Failed to set in%d limits read-only (%d, %d)\n",
2123 i, err_max, err_min);
2124 else
2125 dev_info(&client->dev,
2126 "in%d limits set dynamically from VID\n", i);
2127 }
2128 }
2129
2130 /* Check pins that can be used for either temperature or voltage monitoring */
w83795_apply_temp_config(struct w83795_data * data,u8 config,int temp_chan,int in_chan)2131 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
2132 int temp_chan, int in_chan)
2133 {
2134 /* config is a 2-bit value */
2135 switch (config) {
2136 case 0x2: /* Voltage monitoring */
2137 data->has_in |= 1 << in_chan;
2138 break;
2139 case 0x1: /* Thermal diode */
2140 if (temp_chan >= 4)
2141 break;
2142 data->temp_mode |= 1 << temp_chan;
2143 /* fall through */
2144 case 0x3: /* Thermistor */
2145 data->has_temp |= 1 << temp_chan;
2146 break;
2147 }
2148 }
2149
w83795_probe(struct i2c_client * client,const struct i2c_device_id * id)2150 static int w83795_probe(struct i2c_client *client,
2151 const struct i2c_device_id *id)
2152 {
2153 int i;
2154 u8 tmp;
2155 struct device *dev = &client->dev;
2156 struct w83795_data *data;
2157 int err;
2158
2159 data = devm_kzalloc(dev, sizeof(struct w83795_data), GFP_KERNEL);
2160 if (!data)
2161 return -ENOMEM;
2162
2163 i2c_set_clientdata(client, data);
2164 data->chip_type = id->driver_data;
2165 data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
2166 mutex_init(&data->update_lock);
2167
2168 /* Initialize the chip */
2169 w83795_init_client(client);
2170
2171 /* Check which voltages and fans are present */
2172 data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
2173 | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
2174 data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
2175 | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
2176
2177 /* Check which analog temperatures and extra voltages are present */
2178 tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2179 if (tmp & 0x20)
2180 data->enable_dts = 1;
2181 w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2182 w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2183 tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2184 w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2185 w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2186 w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2187 w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2188
2189 /* Check DTS enable status */
2190 if (data->enable_dts) {
2191 if (1 & w83795_read(client, W83795_REG_DTSC))
2192 data->enable_dts |= 2;
2193 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2194 }
2195
2196 /* Report PECI Tbase values */
2197 if (data->enable_dts == 1) {
2198 for (i = 0; i < 8; i++) {
2199 if (!(data->has_dts & (1 << i)))
2200 continue;
2201 tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2202 dev_info(&client->dev,
2203 "PECI agent %d Tbase temperature: %u\n",
2204 i + 1, (unsigned int)tmp & 0x7f);
2205 }
2206 }
2207
2208 data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2209
2210 /* pwm and smart fan */
2211 if (data->chip_type == w83795g)
2212 data->has_pwm = 8;
2213 else
2214 data->has_pwm = 2;
2215
2216 /* Check if BEEP pin is available */
2217 if (data->chip_type == w83795g) {
2218 /* The W83795G has a dedicated BEEP pin */
2219 data->enable_beep = 1;
2220 } else {
2221 /*
2222 * The W83795ADG has a shared pin for OVT# and BEEP, so you
2223 * can't have both
2224 */
2225 tmp = w83795_read(client, W83795_REG_OVT_CFG);
2226 if ((tmp & OVT_CFG_SEL) == 0)
2227 data->enable_beep = 1;
2228 }
2229
2230 err = w83795_handle_files(dev, device_create_file);
2231 if (err)
2232 goto exit_remove;
2233
2234 if (data->chip_type == w83795g)
2235 w83795_check_dynamic_in_limits(client);
2236
2237 data->hwmon_dev = hwmon_device_register(dev);
2238 if (IS_ERR(data->hwmon_dev)) {
2239 err = PTR_ERR(data->hwmon_dev);
2240 goto exit_remove;
2241 }
2242
2243 return 0;
2244
2245 exit_remove:
2246 w83795_handle_files(dev, device_remove_file_wrapper);
2247 return err;
2248 }
2249
w83795_remove(struct i2c_client * client)2250 static int w83795_remove(struct i2c_client *client)
2251 {
2252 struct w83795_data *data = i2c_get_clientdata(client);
2253
2254 hwmon_device_unregister(data->hwmon_dev);
2255 w83795_handle_files(&client->dev, device_remove_file_wrapper);
2256
2257 return 0;
2258 }
2259
2260
2261 static const struct i2c_device_id w83795_id[] = {
2262 { "w83795g", w83795g },
2263 { "w83795adg", w83795adg },
2264 { }
2265 };
2266 MODULE_DEVICE_TABLE(i2c, w83795_id);
2267
2268 static struct i2c_driver w83795_driver = {
2269 .driver = {
2270 .name = "w83795",
2271 },
2272 .probe = w83795_probe,
2273 .remove = w83795_remove,
2274 .id_table = w83795_id,
2275
2276 .class = I2C_CLASS_HWMON,
2277 .detect = w83795_detect,
2278 .address_list = normal_i2c,
2279 };
2280
2281 module_i2c_driver(w83795_driver);
2282
2283 MODULE_AUTHOR("Wei Song, Jean Delvare <jdelvare@suse.de>");
2284 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2285 MODULE_LICENSE("GPL");
2286
