xref: /linux/drivers/hwmon/dme1737.c (revision 4413e16d9d21673bb5048a2e542f1aaa00015c2e)
1 /*
2  * dme1737.c - Driver for the SMSC DME1737, Asus A8000, SMSC SCH311x, SCH5027,
3  *             and SCH5127 Super-I/O chips integrated hardware monitoring
4  *             features.
5  * Copyright (c) 2007, 2008, 2009, 2010 Juerg Haefliger <juergh@gmail.com>
6  *
7  * This driver is an I2C/ISA hybrid, meaning that it uses the I2C bus to access
8  * the chip registers if a DME1737, A8000, or SCH5027 is found and the ISA bus
9  * if a SCH311x or SCH5127 chip is found. Both types of chips have very
10  * similar hardware monitoring capabilities but differ in the way they can be
11  * accessed.
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26  */
27 
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29 
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/jiffies.h>
34 #include <linux/i2c.h>
35 #include <linux/platform_device.h>
36 #include <linux/hwmon.h>
37 #include <linux/hwmon-sysfs.h>
38 #include <linux/hwmon-vid.h>
39 #include <linux/err.h>
40 #include <linux/mutex.h>
41 #include <linux/acpi.h>
42 #include <linux/io.h>
43 
44 /* ISA device, if found */
45 static struct platform_device *pdev;
46 
47 /* Module load parameters */
48 static bool force_start;
49 module_param(force_start, bool, 0);
50 MODULE_PARM_DESC(force_start, "Force the chip to start monitoring inputs");
51 
52 static unsigned short force_id;
53 module_param(force_id, ushort, 0);
54 MODULE_PARM_DESC(force_id, "Override the detected device ID");
55 
56 static bool probe_all_addr;
57 module_param(probe_all_addr, bool, 0);
58 MODULE_PARM_DESC(probe_all_addr, "Include probing of non-standard LPC "
59 		 "addresses");
60 
61 /* Addresses to scan */
62 static const unsigned short normal_i2c[] = {0x2c, 0x2d, 0x2e, I2C_CLIENT_END};
63 
64 enum chips { dme1737, sch5027, sch311x, sch5127 };
65 
66 /* ---------------------------------------------------------------------
67  * Registers
68  *
69  * The sensors are defined as follows:
70  *
71  * Voltages                          Temperatures
72  * --------                          ------------
73  * in0   +5VTR (+5V stdby)           temp1   Remote diode 1
74  * in1   Vccp  (proc core)           temp2   Internal temp
75  * in2   VCC   (internal +3.3V)      temp3   Remote diode 2
76  * in3   +5V
77  * in4   +12V
78  * in5   VTR   (+3.3V stby)
79  * in6   Vbat
80  * in7   Vtrip (sch5127 only)
81  *
82  * --------------------------------------------------------------------- */
83 
84 /* Voltages (in) numbered 0-7 (ix) */
85 #define DME1737_REG_IN(ix)		((ix) < 5 ? 0x20 + (ix) : \
86 					 (ix) < 7 ? 0x94 + (ix) : \
87 						    0x1f)
88 #define DME1737_REG_IN_MIN(ix)		((ix) < 5 ? 0x44 + (ix) * 2 \
89 						  : 0x91 + (ix) * 2)
90 #define DME1737_REG_IN_MAX(ix)		((ix) < 5 ? 0x45 + (ix) * 2 \
91 						  : 0x92 + (ix) * 2)
92 
93 /* Temperatures (temp) numbered 0-2 (ix) */
94 #define DME1737_REG_TEMP(ix)		(0x25 + (ix))
95 #define DME1737_REG_TEMP_MIN(ix)	(0x4e + (ix) * 2)
96 #define DME1737_REG_TEMP_MAX(ix)	(0x4f + (ix) * 2)
97 #define DME1737_REG_TEMP_OFFSET(ix)	((ix) == 0 ? 0x1f \
98 						   : 0x1c + (ix))
99 
100 /*
101  * Voltage and temperature LSBs
102  * The LSBs (4 bits each) are stored in 5 registers with the following layouts:
103  *    IN_TEMP_LSB(0) = [in5, in6]
104  *    IN_TEMP_LSB(1) = [temp3, temp1]
105  *    IN_TEMP_LSB(2) = [in4, temp2]
106  *    IN_TEMP_LSB(3) = [in3, in0]
107  *    IN_TEMP_LSB(4) = [in2, in1]
108  *    IN_TEMP_LSB(5) = [res, in7]
109  */
110 #define DME1737_REG_IN_TEMP_LSB(ix)	(0x84 + (ix))
111 static const u8 DME1737_REG_IN_LSB[] = {3, 4, 4, 3, 2, 0, 0, 5};
112 static const u8 DME1737_REG_IN_LSB_SHL[] = {4, 4, 0, 0, 0, 0, 4, 4};
113 static const u8 DME1737_REG_TEMP_LSB[] = {1, 2, 1};
114 static const u8 DME1737_REG_TEMP_LSB_SHL[] = {4, 4, 0};
115 
116 /* Fans numbered 0-5 (ix) */
117 #define DME1737_REG_FAN(ix)		((ix) < 4 ? 0x28 + (ix) * 2 \
118 						  : 0xa1 + (ix) * 2)
119 #define DME1737_REG_FAN_MIN(ix)		((ix) < 4 ? 0x54 + (ix) * 2 \
120 						  : 0xa5 + (ix) * 2)
121 #define DME1737_REG_FAN_OPT(ix)		((ix) < 4 ? 0x90 + (ix) \
122 						  : 0xb2 + (ix))
123 #define DME1737_REG_FAN_MAX(ix)		(0xb4 + (ix)) /* only for fan[4-5] */
124 
125 /* PWMs numbered 0-2, 4-5 (ix) */
126 #define DME1737_REG_PWM(ix)		((ix) < 3 ? 0x30 + (ix) \
127 						  : 0xa1 + (ix))
128 #define DME1737_REG_PWM_CONFIG(ix)	(0x5c + (ix)) /* only for pwm[0-2] */
129 #define DME1737_REG_PWM_MIN(ix)		(0x64 + (ix)) /* only for pwm[0-2] */
130 #define DME1737_REG_PWM_FREQ(ix)	((ix) < 3 ? 0x5f + (ix) \
131 						  : 0xa3 + (ix))
132 /*
133  * The layout of the ramp rate registers is different from the other pwm
134  * registers. The bits for the 3 PWMs are stored in 2 registers:
135  *    PWM_RR(0) = [OFF3, OFF2,  OFF1,  RES,   RR1E, RR1-2, RR1-1, RR1-0]
136  *    PWM_RR(1) = [RR2E, RR2-2, RR2-1, RR2-0, RR3E, RR3-2, RR3-1, RR3-0]
137  */
138 #define DME1737_REG_PWM_RR(ix)		(0x62 + (ix)) /* only for pwm[0-2] */
139 
140 /* Thermal zones 0-2 */
141 #define DME1737_REG_ZONE_LOW(ix)	(0x67 + (ix))
142 #define DME1737_REG_ZONE_ABS(ix)	(0x6a + (ix))
143 /*
144  * The layout of the hysteresis registers is different from the other zone
145  * registers. The bits for the 3 zones are stored in 2 registers:
146  *    ZONE_HYST(0) = [H1-3,  H1-2,  H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
147  *    ZONE_HYST(1) = [H3-3,  H3-2,  H3-1, H3-0, RES,  RES,  RES,  RES]
148  */
149 #define DME1737_REG_ZONE_HYST(ix)	(0x6d + (ix))
150 
151 /*
152  * Alarm registers and bit mapping
153  * The 3 8-bit alarm registers will be concatenated to a single 32-bit
154  * alarm value [0, ALARM3, ALARM2, ALARM1].
155  */
156 #define DME1737_REG_ALARM1		0x41
157 #define DME1737_REG_ALARM2		0x42
158 #define DME1737_REG_ALARM3		0x83
159 static const u8 DME1737_BIT_ALARM_IN[] = {0, 1, 2, 3, 8, 16, 17, 18};
160 static const u8 DME1737_BIT_ALARM_TEMP[] = {4, 5, 6};
161 static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
162 
163 /* Miscellaneous registers */
164 #define DME1737_REG_DEVICE		0x3d
165 #define DME1737_REG_COMPANY		0x3e
166 #define DME1737_REG_VERSTEP		0x3f
167 #define DME1737_REG_CONFIG		0x40
168 #define DME1737_REG_CONFIG2		0x7f
169 #define DME1737_REG_VID			0x43
170 #define DME1737_REG_TACH_PWM		0x81
171 
172 /* ---------------------------------------------------------------------
173  * Misc defines
174  * --------------------------------------------------------------------- */
175 
176 /* Chip identification */
177 #define DME1737_COMPANY_SMSC	0x5c
178 #define DME1737_VERSTEP		0x88
179 #define DME1737_VERSTEP_MASK	0xf8
180 #define SCH311X_DEVICE		0x8c
181 #define SCH5027_VERSTEP		0x69
182 #define SCH5127_DEVICE		0x8e
183 
184 /* Device ID values (global configuration register index 0x20) */
185 #define DME1737_ID_1	0x77
186 #define DME1737_ID_2	0x78
187 #define SCH3112_ID	0x7c
188 #define SCH3114_ID	0x7d
189 #define SCH3116_ID	0x7f
190 #define SCH5027_ID	0x89
191 #define SCH5127_ID	0x86
192 
193 /* Length of ISA address segment */
194 #define DME1737_EXTENT	2
195 
196 /* chip-dependent features */
197 #define HAS_TEMP_OFFSET		(1 << 0)		/* bit 0 */
198 #define HAS_VID			(1 << 1)		/* bit 1 */
199 #define HAS_ZONE3		(1 << 2)		/* bit 2 */
200 #define HAS_ZONE_HYST		(1 << 3)		/* bit 3 */
201 #define HAS_PWM_MIN		(1 << 4)		/* bit 4 */
202 #define HAS_FAN(ix)		(1 << ((ix) + 5))	/* bits 5-10 */
203 #define HAS_PWM(ix)		(1 << ((ix) + 11))	/* bits 11-16 */
204 #define HAS_IN7			(1 << 17)		/* bit 17 */
205 
206 /* ---------------------------------------------------------------------
207  * Data structures and manipulation thereof
208  * --------------------------------------------------------------------- */
209 
210 struct dme1737_data {
211 	struct i2c_client *client;	/* for I2C devices only */
212 	struct device *hwmon_dev;
213 	const char *name;
214 	unsigned int addr;		/* for ISA devices only */
215 
216 	struct mutex update_lock;
217 	int valid;			/* !=0 if following fields are valid */
218 	unsigned long last_update;	/* in jiffies */
219 	unsigned long last_vbat;	/* in jiffies */
220 	enum chips type;
221 	const int *in_nominal;		/* pointer to IN_NOMINAL array */
222 
223 	u8 vid;
224 	u8 pwm_rr_en;
225 	u32 has_features;
226 
227 	/* Register values */
228 	u16 in[8];
229 	u8  in_min[8];
230 	u8  in_max[8];
231 	s16 temp[3];
232 	s8  temp_min[3];
233 	s8  temp_max[3];
234 	s8  temp_offset[3];
235 	u8  config;
236 	u8  config2;
237 	u8  vrm;
238 	u16 fan[6];
239 	u16 fan_min[6];
240 	u8  fan_max[2];
241 	u8  fan_opt[6];
242 	u8  pwm[6];
243 	u8  pwm_min[3];
244 	u8  pwm_config[3];
245 	u8  pwm_acz[3];
246 	u8  pwm_freq[6];
247 	u8  pwm_rr[2];
248 	u8  zone_low[3];
249 	u8  zone_abs[3];
250 	u8  zone_hyst[2];
251 	u32 alarms;
252 };
253 
254 /* Nominal voltage values */
255 static const int IN_NOMINAL_DME1737[] = {5000, 2250, 3300, 5000, 12000, 3300,
256 					 3300};
257 static const int IN_NOMINAL_SCH311x[] = {2500, 1500, 3300, 5000, 12000, 3300,
258 					 3300};
259 static const int IN_NOMINAL_SCH5027[] = {5000, 2250, 3300, 1125, 1125, 3300,
260 					 3300};
261 static const int IN_NOMINAL_SCH5127[] = {2500, 2250, 3300, 1125, 1125, 3300,
262 					 3300, 1500};
263 #define IN_NOMINAL(type)	((type) == sch311x ? IN_NOMINAL_SCH311x : \
264 				 (type) == sch5027 ? IN_NOMINAL_SCH5027 : \
265 				 (type) == sch5127 ? IN_NOMINAL_SCH5127 : \
266 				 IN_NOMINAL_DME1737)
267 
268 /*
269  * Voltage input
270  * Voltage inputs have 16 bits resolution, limit values have 8 bits
271  * resolution.
272  */
273 static inline int IN_FROM_REG(int reg, int nominal, int res)
274 {
275 	return (reg * nominal + (3 << (res - 3))) / (3 << (res - 2));
276 }
277 
278 static inline int IN_TO_REG(int val, int nominal)
279 {
280 	return SENSORS_LIMIT((val * 192 + nominal / 2) / nominal, 0, 255);
281 }
282 
283 /*
284  * Temperature input
285  * The register values represent temperatures in 2's complement notation from
286  * -127 degrees C to +127 degrees C. Temp inputs have 16 bits resolution, limit
287  * values have 8 bits resolution.
288  */
289 static inline int TEMP_FROM_REG(int reg, int res)
290 {
291 	return (reg * 1000) >> (res - 8);
292 }
293 
294 static inline int TEMP_TO_REG(int val)
295 {
296 	return SENSORS_LIMIT((val < 0 ? val - 500 : val + 500) / 1000,
297 			     -128, 127);
298 }
299 
300 /* Temperature range */
301 static const int TEMP_RANGE[] = {2000, 2500, 3333, 4000, 5000, 6666, 8000,
302 				 10000, 13333, 16000, 20000, 26666, 32000,
303 				 40000, 53333, 80000};
304 
305 static inline int TEMP_RANGE_FROM_REG(int reg)
306 {
307 	return TEMP_RANGE[(reg >> 4) & 0x0f];
308 }
309 
310 static int TEMP_RANGE_TO_REG(int val, int reg)
311 {
312 	int i;
313 
314 	for (i = 15; i > 0; i--) {
315 		if (val > (TEMP_RANGE[i] + TEMP_RANGE[i - 1] + 1) / 2)
316 			break;
317 	}
318 
319 	return (reg & 0x0f) | (i << 4);
320 }
321 
322 /*
323  * Temperature hysteresis
324  * Register layout:
325  *    reg[0] = [H1-3, H1-2, H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
326  *    reg[1] = [H3-3, H3-2, H3-1, H3-0, xxxx, xxxx, xxxx, xxxx]
327  */
328 static inline int TEMP_HYST_FROM_REG(int reg, int ix)
329 {
330 	return (((ix == 1) ? reg : reg >> 4) & 0x0f) * 1000;
331 }
332 
333 static inline int TEMP_HYST_TO_REG(int val, int ix, int reg)
334 {
335 	int hyst = SENSORS_LIMIT((val + 500) / 1000, 0, 15);
336 
337 	return (ix == 1) ? (reg & 0xf0) | hyst : (reg & 0x0f) | (hyst << 4);
338 }
339 
340 /* Fan input RPM */
341 static inline int FAN_FROM_REG(int reg, int tpc)
342 {
343 	if (tpc)
344 		return tpc * reg;
345 	else
346 		return (reg == 0 || reg == 0xffff) ? 0 : 90000 * 60 / reg;
347 }
348 
349 static inline int FAN_TO_REG(int val, int tpc)
350 {
351 	if (tpc) {
352 		return SENSORS_LIMIT(val / tpc, 0, 0xffff);
353 	} else {
354 		return (val <= 0) ? 0xffff :
355 			SENSORS_LIMIT(90000 * 60 / val, 0, 0xfffe);
356 	}
357 }
358 
359 /*
360  * Fan TPC (tach pulse count)
361  * Converts a register value to a TPC multiplier or returns 0 if the tachometer
362  * is configured in legacy (non-tpc) mode
363  */
364 static inline int FAN_TPC_FROM_REG(int reg)
365 {
366 	return (reg & 0x20) ? 0 : 60 >> (reg & 0x03);
367 }
368 
369 /*
370  * Fan type
371  * The type of a fan is expressed in number of pulses-per-revolution that it
372  * emits
373  */
374 static inline int FAN_TYPE_FROM_REG(int reg)
375 {
376 	int edge = (reg >> 1) & 0x03;
377 
378 	return (edge > 0) ? 1 << (edge - 1) : 0;
379 }
380 
381 static inline int FAN_TYPE_TO_REG(int val, int reg)
382 {
383 	int edge = (val == 4) ? 3 : val;
384 
385 	return (reg & 0xf9) | (edge << 1);
386 }
387 
388 /* Fan max RPM */
389 static const int FAN_MAX[] = {0x54, 0x38, 0x2a, 0x21, 0x1c, 0x18, 0x15, 0x12,
390 			      0x11, 0x0f, 0x0e};
391 
392 static int FAN_MAX_FROM_REG(int reg)
393 {
394 	int i;
395 
396 	for (i = 10; i > 0; i--) {
397 		if (reg == FAN_MAX[i])
398 			break;
399 	}
400 
401 	return 1000 + i * 500;
402 }
403 
404 static int FAN_MAX_TO_REG(int val)
405 {
406 	int i;
407 
408 	for (i = 10; i > 0; i--) {
409 		if (val > (1000 + (i - 1) * 500))
410 			break;
411 	}
412 
413 	return FAN_MAX[i];
414 }
415 
416 /*
417  * PWM enable
418  * Register to enable mapping:
419  * 000:  2  fan on zone 1 auto
420  * 001:  2  fan on zone 2 auto
421  * 010:  2  fan on zone 3 auto
422  * 011:  0  fan full on
423  * 100: -1  fan disabled
424  * 101:  2  fan on hottest of zones 2,3 auto
425  * 110:  2  fan on hottest of zones 1,2,3 auto
426  * 111:  1  fan in manual mode
427  */
428 static inline int PWM_EN_FROM_REG(int reg)
429 {
430 	static const int en[] = {2, 2, 2, 0, -1, 2, 2, 1};
431 
432 	return en[(reg >> 5) & 0x07];
433 }
434 
435 static inline int PWM_EN_TO_REG(int val, int reg)
436 {
437 	int en = (val == 1) ? 7 : 3;
438 
439 	return (reg & 0x1f) | ((en & 0x07) << 5);
440 }
441 
442 /*
443  * PWM auto channels zone
444  * Register to auto channels zone mapping (ACZ is a bitfield with bit x
445  * corresponding to zone x+1):
446  * 000: 001  fan on zone 1 auto
447  * 001: 010  fan on zone 2 auto
448  * 010: 100  fan on zone 3 auto
449  * 011: 000  fan full on
450  * 100: 000  fan disabled
451  * 101: 110  fan on hottest of zones 2,3 auto
452  * 110: 111  fan on hottest of zones 1,2,3 auto
453  * 111: 000  fan in manual mode
454  */
455 static inline int PWM_ACZ_FROM_REG(int reg)
456 {
457 	static const int acz[] = {1, 2, 4, 0, 0, 6, 7, 0};
458 
459 	return acz[(reg >> 5) & 0x07];
460 }
461 
462 static inline int PWM_ACZ_TO_REG(int val, int reg)
463 {
464 	int acz = (val == 4) ? 2 : val - 1;
465 
466 	return (reg & 0x1f) | ((acz & 0x07) << 5);
467 }
468 
469 /* PWM frequency */
470 static const int PWM_FREQ[] = {11, 15, 22, 29, 35, 44, 59, 88,
471 			       15000, 20000, 30000, 25000, 0, 0, 0, 0};
472 
473 static inline int PWM_FREQ_FROM_REG(int reg)
474 {
475 	return PWM_FREQ[reg & 0x0f];
476 }
477 
478 static int PWM_FREQ_TO_REG(int val, int reg)
479 {
480 	int i;
481 
482 	/* the first two cases are special - stupid chip design! */
483 	if (val > 27500) {
484 		i = 10;
485 	} else if (val > 22500) {
486 		i = 11;
487 	} else {
488 		for (i = 9; i > 0; i--) {
489 			if (val > (PWM_FREQ[i] + PWM_FREQ[i - 1] + 1) / 2)
490 				break;
491 		}
492 	}
493 
494 	return (reg & 0xf0) | i;
495 }
496 
497 /*
498  * PWM ramp rate
499  * Register layout:
500  *    reg[0] = [OFF3,  OFF2,  OFF1,  RES,   RR1-E, RR1-2, RR1-1, RR1-0]
501  *    reg[1] = [RR2-E, RR2-2, RR2-1, RR2-0, RR3-E, RR3-2, RR3-1, RR3-0]
502  */
503 static const u8 PWM_RR[] = {206, 104, 69, 41, 26, 18, 10, 5};
504 
505 static inline int PWM_RR_FROM_REG(int reg, int ix)
506 {
507 	int rr = (ix == 1) ? reg >> 4 : reg;
508 
509 	return (rr & 0x08) ? PWM_RR[rr & 0x07] : 0;
510 }
511 
512 static int PWM_RR_TO_REG(int val, int ix, int reg)
513 {
514 	int i;
515 
516 	for (i = 0; i < 7; i++) {
517 		if (val > (PWM_RR[i] + PWM_RR[i + 1] + 1) / 2)
518 			break;
519 	}
520 
521 	return (ix == 1) ? (reg & 0x8f) | (i << 4) : (reg & 0xf8) | i;
522 }
523 
524 /* PWM ramp rate enable */
525 static inline int PWM_RR_EN_FROM_REG(int reg, int ix)
526 {
527 	return PWM_RR_FROM_REG(reg, ix) ? 1 : 0;
528 }
529 
530 static inline int PWM_RR_EN_TO_REG(int val, int ix, int reg)
531 {
532 	int en = (ix == 1) ? 0x80 : 0x08;
533 
534 	return val ? reg | en : reg & ~en;
535 }
536 
537 /*
538  * PWM min/off
539  * The PWM min/off bits are part of the PMW ramp rate register 0 (see above for
540  * the register layout).
541  */
542 static inline int PWM_OFF_FROM_REG(int reg, int ix)
543 {
544 	return (reg >> (ix + 5)) & 0x01;
545 }
546 
547 static inline int PWM_OFF_TO_REG(int val, int ix, int reg)
548 {
549 	return (reg & ~(1 << (ix + 5))) | ((val & 0x01) << (ix + 5));
550 }
551 
552 /* ---------------------------------------------------------------------
553  * Device I/O access
554  *
555  * ISA access is performed through an index/data register pair and needs to
556  * be protected by a mutex during runtime (not required for initialization).
557  * We use data->update_lock for this and need to ensure that we acquire it
558  * before calling dme1737_read or dme1737_write.
559  * --------------------------------------------------------------------- */
560 
561 static u8 dme1737_read(const struct dme1737_data *data, u8 reg)
562 {
563 	struct i2c_client *client = data->client;
564 	s32 val;
565 
566 	if (client) { /* I2C device */
567 		val = i2c_smbus_read_byte_data(client, reg);
568 
569 		if (val < 0) {
570 			dev_warn(&client->dev, "Read from register "
571 				 "0x%02x failed! Please report to the driver "
572 				 "maintainer.\n", reg);
573 		}
574 	} else { /* ISA device */
575 		outb(reg, data->addr);
576 		val = inb(data->addr + 1);
577 	}
578 
579 	return val;
580 }
581 
582 static s32 dme1737_write(const struct dme1737_data *data, u8 reg, u8 val)
583 {
584 	struct i2c_client *client = data->client;
585 	s32 res = 0;
586 
587 	if (client) { /* I2C device */
588 		res = i2c_smbus_write_byte_data(client, reg, val);
589 
590 		if (res < 0) {
591 			dev_warn(&client->dev, "Write to register "
592 				 "0x%02x failed! Please report to the driver "
593 				 "maintainer.\n", reg);
594 		}
595 	} else { /* ISA device */
596 		outb(reg, data->addr);
597 		outb(val, data->addr + 1);
598 	}
599 
600 	return res;
601 }
602 
603 static struct dme1737_data *dme1737_update_device(struct device *dev)
604 {
605 	struct dme1737_data *data = dev_get_drvdata(dev);
606 	int ix;
607 	u8 lsb[6];
608 
609 	mutex_lock(&data->update_lock);
610 
611 	/* Enable a Vbat monitoring cycle every 10 mins */
612 	if (time_after(jiffies, data->last_vbat + 600 * HZ) || !data->valid) {
613 		dme1737_write(data, DME1737_REG_CONFIG, dme1737_read(data,
614 						DME1737_REG_CONFIG) | 0x10);
615 		data->last_vbat = jiffies;
616 	}
617 
618 	/* Sample register contents every 1 sec */
619 	if (time_after(jiffies, data->last_update + HZ) || !data->valid) {
620 		if (data->has_features & HAS_VID) {
621 			data->vid = dme1737_read(data, DME1737_REG_VID) &
622 				0x3f;
623 		}
624 
625 		/* In (voltage) registers */
626 		for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
627 			/*
628 			 * Voltage inputs are stored as 16 bit values even
629 			 * though they have only 12 bits resolution. This is
630 			 * to make it consistent with the temp inputs.
631 			 */
632 			if (ix == 7 && !(data->has_features & HAS_IN7))
633 				continue;
634 			data->in[ix] = dme1737_read(data,
635 					DME1737_REG_IN(ix)) << 8;
636 			data->in_min[ix] = dme1737_read(data,
637 					DME1737_REG_IN_MIN(ix));
638 			data->in_max[ix] = dme1737_read(data,
639 					DME1737_REG_IN_MAX(ix));
640 		}
641 
642 		/* Temp registers */
643 		for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
644 			/*
645 			 * Temp inputs are stored as 16 bit values even
646 			 * though they have only 12 bits resolution. This is
647 			 * to take advantage of implicit conversions between
648 			 * register values (2's complement) and temp values
649 			 * (signed decimal).
650 			 */
651 			data->temp[ix] = dme1737_read(data,
652 					DME1737_REG_TEMP(ix)) << 8;
653 			data->temp_min[ix] = dme1737_read(data,
654 					DME1737_REG_TEMP_MIN(ix));
655 			data->temp_max[ix] = dme1737_read(data,
656 					DME1737_REG_TEMP_MAX(ix));
657 			if (data->has_features & HAS_TEMP_OFFSET) {
658 				data->temp_offset[ix] = dme1737_read(data,
659 						DME1737_REG_TEMP_OFFSET(ix));
660 			}
661 		}
662 
663 		/*
664 		 * In and temp LSB registers
665 		 * The LSBs are latched when the MSBs are read, so the order in
666 		 * which the registers are read (MSB first, then LSB) is
667 		 * important!
668 		 */
669 		for (ix = 0; ix < ARRAY_SIZE(lsb); ix++) {
670 			if (ix == 5 && !(data->has_features & HAS_IN7))
671 				continue;
672 			lsb[ix] = dme1737_read(data,
673 					DME1737_REG_IN_TEMP_LSB(ix));
674 		}
675 		for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
676 			if (ix == 7 && !(data->has_features & HAS_IN7))
677 				continue;
678 			data->in[ix] |= (lsb[DME1737_REG_IN_LSB[ix]] <<
679 					DME1737_REG_IN_LSB_SHL[ix]) & 0xf0;
680 		}
681 		for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
682 			data->temp[ix] |= (lsb[DME1737_REG_TEMP_LSB[ix]] <<
683 					DME1737_REG_TEMP_LSB_SHL[ix]) & 0xf0;
684 		}
685 
686 		/* Fan registers */
687 		for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
688 			/*
689 			 * Skip reading registers if optional fans are not
690 			 * present
691 			 */
692 			if (!(data->has_features & HAS_FAN(ix)))
693 				continue;
694 			data->fan[ix] = dme1737_read(data,
695 					DME1737_REG_FAN(ix));
696 			data->fan[ix] |= dme1737_read(data,
697 					DME1737_REG_FAN(ix) + 1) << 8;
698 			data->fan_min[ix] = dme1737_read(data,
699 					DME1737_REG_FAN_MIN(ix));
700 			data->fan_min[ix] |= dme1737_read(data,
701 					DME1737_REG_FAN_MIN(ix) + 1) << 8;
702 			data->fan_opt[ix] = dme1737_read(data,
703 					DME1737_REG_FAN_OPT(ix));
704 			/* fan_max exists only for fan[5-6] */
705 			if (ix > 3) {
706 				data->fan_max[ix - 4] = dme1737_read(data,
707 					DME1737_REG_FAN_MAX(ix));
708 			}
709 		}
710 
711 		/* PWM registers */
712 		for (ix = 0; ix < ARRAY_SIZE(data->pwm); ix++) {
713 			/*
714 			 * Skip reading registers if optional PWMs are not
715 			 * present
716 			 */
717 			if (!(data->has_features & HAS_PWM(ix)))
718 				continue;
719 			data->pwm[ix] = dme1737_read(data,
720 					DME1737_REG_PWM(ix));
721 			data->pwm_freq[ix] = dme1737_read(data,
722 					DME1737_REG_PWM_FREQ(ix));
723 			/* pwm_config and pwm_min exist only for pwm[1-3] */
724 			if (ix < 3) {
725 				data->pwm_config[ix] = dme1737_read(data,
726 						DME1737_REG_PWM_CONFIG(ix));
727 				data->pwm_min[ix] = dme1737_read(data,
728 						DME1737_REG_PWM_MIN(ix));
729 			}
730 		}
731 		for (ix = 0; ix < ARRAY_SIZE(data->pwm_rr); ix++) {
732 			data->pwm_rr[ix] = dme1737_read(data,
733 						DME1737_REG_PWM_RR(ix));
734 		}
735 
736 		/* Thermal zone registers */
737 		for (ix = 0; ix < ARRAY_SIZE(data->zone_low); ix++) {
738 			/* Skip reading registers if zone3 is not present */
739 			if ((ix == 2) && !(data->has_features & HAS_ZONE3))
740 				continue;
741 			/* sch5127 zone2 registers are special */
742 			if ((ix == 1) && (data->type == sch5127)) {
743 				data->zone_low[1] = dme1737_read(data,
744 						DME1737_REG_ZONE_LOW(2));
745 				data->zone_abs[1] = dme1737_read(data,
746 						DME1737_REG_ZONE_ABS(2));
747 			} else {
748 				data->zone_low[ix] = dme1737_read(data,
749 						DME1737_REG_ZONE_LOW(ix));
750 				data->zone_abs[ix] = dme1737_read(data,
751 						DME1737_REG_ZONE_ABS(ix));
752 			}
753 		}
754 		if (data->has_features & HAS_ZONE_HYST) {
755 			for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
756 				data->zone_hyst[ix] = dme1737_read(data,
757 						DME1737_REG_ZONE_HYST(ix));
758 			}
759 		}
760 
761 		/* Alarm registers */
762 		data->alarms = dme1737_read(data,
763 						DME1737_REG_ALARM1);
764 		/*
765 		 * Bit 7 tells us if the other alarm registers are non-zero and
766 		 * therefore also need to be read
767 		 */
768 		if (data->alarms & 0x80) {
769 			data->alarms |= dme1737_read(data,
770 						DME1737_REG_ALARM2) << 8;
771 			data->alarms |= dme1737_read(data,
772 						DME1737_REG_ALARM3) << 16;
773 		}
774 
775 		/*
776 		 * The ISA chips require explicit clearing of alarm bits.
777 		 * Don't worry, an alarm will come back if the condition
778 		 * that causes it still exists
779 		 */
780 		if (!data->client) {
781 			if (data->alarms & 0xff0000)
782 				dme1737_write(data, DME1737_REG_ALARM3, 0xff);
783 			if (data->alarms & 0xff00)
784 				dme1737_write(data, DME1737_REG_ALARM2, 0xff);
785 			if (data->alarms & 0xff)
786 				dme1737_write(data, DME1737_REG_ALARM1, 0xff);
787 		}
788 
789 		data->last_update = jiffies;
790 		data->valid = 1;
791 	}
792 
793 	mutex_unlock(&data->update_lock);
794 
795 	return data;
796 }
797 
798 /* ---------------------------------------------------------------------
799  * Voltage sysfs attributes
800  * ix = [0-7]
801  * --------------------------------------------------------------------- */
802 
803 #define SYS_IN_INPUT	0
804 #define SYS_IN_MIN	1
805 #define SYS_IN_MAX	2
806 #define SYS_IN_ALARM	3
807 
808 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
809 		       char *buf)
810 {
811 	struct dme1737_data *data = dme1737_update_device(dev);
812 	struct sensor_device_attribute_2
813 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
814 	int ix = sensor_attr_2->index;
815 	int fn = sensor_attr_2->nr;
816 	int res;
817 
818 	switch (fn) {
819 	case SYS_IN_INPUT:
820 		res = IN_FROM_REG(data->in[ix], data->in_nominal[ix], 16);
821 		break;
822 	case SYS_IN_MIN:
823 		res = IN_FROM_REG(data->in_min[ix], data->in_nominal[ix], 8);
824 		break;
825 	case SYS_IN_MAX:
826 		res = IN_FROM_REG(data->in_max[ix], data->in_nominal[ix], 8);
827 		break;
828 	case SYS_IN_ALARM:
829 		res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
830 		break;
831 	default:
832 		res = 0;
833 		dev_dbg(dev, "Unknown function %d.\n", fn);
834 	}
835 
836 	return sprintf(buf, "%d\n", res);
837 }
838 
839 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
840 		      const char *buf, size_t count)
841 {
842 	struct dme1737_data *data = dev_get_drvdata(dev);
843 	struct sensor_device_attribute_2
844 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
845 	int ix = sensor_attr_2->index;
846 	int fn = sensor_attr_2->nr;
847 	long val;
848 	int err;
849 
850 	err = kstrtol(buf, 10, &val);
851 	if (err)
852 		return err;
853 
854 	mutex_lock(&data->update_lock);
855 	switch (fn) {
856 	case SYS_IN_MIN:
857 		data->in_min[ix] = IN_TO_REG(val, data->in_nominal[ix]);
858 		dme1737_write(data, DME1737_REG_IN_MIN(ix),
859 			      data->in_min[ix]);
860 		break;
861 	case SYS_IN_MAX:
862 		data->in_max[ix] = IN_TO_REG(val, data->in_nominal[ix]);
863 		dme1737_write(data, DME1737_REG_IN_MAX(ix),
864 			      data->in_max[ix]);
865 		break;
866 	default:
867 		dev_dbg(dev, "Unknown function %d.\n", fn);
868 	}
869 	mutex_unlock(&data->update_lock);
870 
871 	return count;
872 }
873 
874 /* ---------------------------------------------------------------------
875  * Temperature sysfs attributes
876  * ix = [0-2]
877  * --------------------------------------------------------------------- */
878 
879 #define SYS_TEMP_INPUT			0
880 #define SYS_TEMP_MIN			1
881 #define SYS_TEMP_MAX			2
882 #define SYS_TEMP_OFFSET			3
883 #define SYS_TEMP_ALARM			4
884 #define SYS_TEMP_FAULT			5
885 
886 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
887 			 char *buf)
888 {
889 	struct dme1737_data *data = dme1737_update_device(dev);
890 	struct sensor_device_attribute_2
891 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
892 	int ix = sensor_attr_2->index;
893 	int fn = sensor_attr_2->nr;
894 	int res;
895 
896 	switch (fn) {
897 	case SYS_TEMP_INPUT:
898 		res = TEMP_FROM_REG(data->temp[ix], 16);
899 		break;
900 	case SYS_TEMP_MIN:
901 		res = TEMP_FROM_REG(data->temp_min[ix], 8);
902 		break;
903 	case SYS_TEMP_MAX:
904 		res = TEMP_FROM_REG(data->temp_max[ix], 8);
905 		break;
906 	case SYS_TEMP_OFFSET:
907 		res = TEMP_FROM_REG(data->temp_offset[ix], 8);
908 		break;
909 	case SYS_TEMP_ALARM:
910 		res = (data->alarms >> DME1737_BIT_ALARM_TEMP[ix]) & 0x01;
911 		break;
912 	case SYS_TEMP_FAULT:
913 		res = (((u16)data->temp[ix] & 0xff00) == 0x8000);
914 		break;
915 	default:
916 		res = 0;
917 		dev_dbg(dev, "Unknown function %d.\n", fn);
918 	}
919 
920 	return sprintf(buf, "%d\n", res);
921 }
922 
923 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
924 			const char *buf, size_t count)
925 {
926 	struct dme1737_data *data = dev_get_drvdata(dev);
927 	struct sensor_device_attribute_2
928 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
929 	int ix = sensor_attr_2->index;
930 	int fn = sensor_attr_2->nr;
931 	long val;
932 	int err;
933 
934 	err = kstrtol(buf, 10, &val);
935 	if (err)
936 		return err;
937 
938 	mutex_lock(&data->update_lock);
939 	switch (fn) {
940 	case SYS_TEMP_MIN:
941 		data->temp_min[ix] = TEMP_TO_REG(val);
942 		dme1737_write(data, DME1737_REG_TEMP_MIN(ix),
943 			      data->temp_min[ix]);
944 		break;
945 	case SYS_TEMP_MAX:
946 		data->temp_max[ix] = TEMP_TO_REG(val);
947 		dme1737_write(data, DME1737_REG_TEMP_MAX(ix),
948 			      data->temp_max[ix]);
949 		break;
950 	case SYS_TEMP_OFFSET:
951 		data->temp_offset[ix] = TEMP_TO_REG(val);
952 		dme1737_write(data, DME1737_REG_TEMP_OFFSET(ix),
953 			      data->temp_offset[ix]);
954 		break;
955 	default:
956 		dev_dbg(dev, "Unknown function %d.\n", fn);
957 	}
958 	mutex_unlock(&data->update_lock);
959 
960 	return count;
961 }
962 
963 /* ---------------------------------------------------------------------
964  * Zone sysfs attributes
965  * ix = [0-2]
966  * --------------------------------------------------------------------- */
967 
968 #define SYS_ZONE_AUTO_CHANNELS_TEMP	0
969 #define SYS_ZONE_AUTO_POINT1_TEMP_HYST	1
970 #define SYS_ZONE_AUTO_POINT1_TEMP	2
971 #define SYS_ZONE_AUTO_POINT2_TEMP	3
972 #define SYS_ZONE_AUTO_POINT3_TEMP	4
973 
974 static ssize_t show_zone(struct device *dev, struct device_attribute *attr,
975 			 char *buf)
976 {
977 	struct dme1737_data *data = dme1737_update_device(dev);
978 	struct sensor_device_attribute_2
979 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
980 	int ix = sensor_attr_2->index;
981 	int fn = sensor_attr_2->nr;
982 	int res;
983 
984 	switch (fn) {
985 	case SYS_ZONE_AUTO_CHANNELS_TEMP:
986 		/* check config2 for non-standard temp-to-zone mapping */
987 		if ((ix == 1) && (data->config2 & 0x02))
988 			res = 4;
989 		else
990 			res = 1 << ix;
991 		break;
992 	case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
993 		res = TEMP_FROM_REG(data->zone_low[ix], 8) -
994 		      TEMP_HYST_FROM_REG(data->zone_hyst[ix == 2], ix);
995 		break;
996 	case SYS_ZONE_AUTO_POINT1_TEMP:
997 		res = TEMP_FROM_REG(data->zone_low[ix], 8);
998 		break;
999 	case SYS_ZONE_AUTO_POINT2_TEMP:
1000 		/* pwm_freq holds the temp range bits in the upper nibble */
1001 		res = TEMP_FROM_REG(data->zone_low[ix], 8) +
1002 		      TEMP_RANGE_FROM_REG(data->pwm_freq[ix]);
1003 		break;
1004 	case SYS_ZONE_AUTO_POINT3_TEMP:
1005 		res = TEMP_FROM_REG(data->zone_abs[ix], 8);
1006 		break;
1007 	default:
1008 		res = 0;
1009 		dev_dbg(dev, "Unknown function %d.\n", fn);
1010 	}
1011 
1012 	return sprintf(buf, "%d\n", res);
1013 }
1014 
1015 static ssize_t set_zone(struct device *dev, struct device_attribute *attr,
1016 			const char *buf, size_t count)
1017 {
1018 	struct dme1737_data *data = dev_get_drvdata(dev);
1019 	struct sensor_device_attribute_2
1020 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
1021 	int ix = sensor_attr_2->index;
1022 	int fn = sensor_attr_2->nr;
1023 	long val;
1024 	int err;
1025 
1026 	err = kstrtol(buf, 10, &val);
1027 	if (err)
1028 		return err;
1029 
1030 	mutex_lock(&data->update_lock);
1031 	switch (fn) {
1032 	case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
1033 		/* Refresh the cache */
1034 		data->zone_low[ix] = dme1737_read(data,
1035 						  DME1737_REG_ZONE_LOW(ix));
1036 		/* Modify the temp hyst value */
1037 		data->zone_hyst[ix == 2] = TEMP_HYST_TO_REG(
1038 					TEMP_FROM_REG(data->zone_low[ix], 8) -
1039 					val, ix, dme1737_read(data,
1040 					DME1737_REG_ZONE_HYST(ix == 2)));
1041 		dme1737_write(data, DME1737_REG_ZONE_HYST(ix == 2),
1042 			      data->zone_hyst[ix == 2]);
1043 		break;
1044 	case SYS_ZONE_AUTO_POINT1_TEMP:
1045 		data->zone_low[ix] = TEMP_TO_REG(val);
1046 		dme1737_write(data, DME1737_REG_ZONE_LOW(ix),
1047 			      data->zone_low[ix]);
1048 		break;
1049 	case SYS_ZONE_AUTO_POINT2_TEMP:
1050 		/* Refresh the cache */
1051 		data->zone_low[ix] = dme1737_read(data,
1052 						  DME1737_REG_ZONE_LOW(ix));
1053 		/*
1054 		 * Modify the temp range value (which is stored in the upper
1055 		 * nibble of the pwm_freq register)
1056 		 */
1057 		data->pwm_freq[ix] = TEMP_RANGE_TO_REG(val -
1058 					TEMP_FROM_REG(data->zone_low[ix], 8),
1059 					dme1737_read(data,
1060 					DME1737_REG_PWM_FREQ(ix)));
1061 		dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
1062 			      data->pwm_freq[ix]);
1063 		break;
1064 	case SYS_ZONE_AUTO_POINT3_TEMP:
1065 		data->zone_abs[ix] = TEMP_TO_REG(val);
1066 		dme1737_write(data, DME1737_REG_ZONE_ABS(ix),
1067 			      data->zone_abs[ix]);
1068 		break;
1069 	default:
1070 		dev_dbg(dev, "Unknown function %d.\n", fn);
1071 	}
1072 	mutex_unlock(&data->update_lock);
1073 
1074 	return count;
1075 }
1076 
1077 /* ---------------------------------------------------------------------
1078  * Fan sysfs attributes
1079  * ix = [0-5]
1080  * --------------------------------------------------------------------- */
1081 
1082 #define SYS_FAN_INPUT	0
1083 #define SYS_FAN_MIN	1
1084 #define SYS_FAN_MAX	2
1085 #define SYS_FAN_ALARM	3
1086 #define SYS_FAN_TYPE	4
1087 
1088 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
1089 			char *buf)
1090 {
1091 	struct dme1737_data *data = dme1737_update_device(dev);
1092 	struct sensor_device_attribute_2
1093 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
1094 	int ix = sensor_attr_2->index;
1095 	int fn = sensor_attr_2->nr;
1096 	int res;
1097 
1098 	switch (fn) {
1099 	case SYS_FAN_INPUT:
1100 		res = FAN_FROM_REG(data->fan[ix],
1101 				   ix < 4 ? 0 :
1102 				   FAN_TPC_FROM_REG(data->fan_opt[ix]));
1103 		break;
1104 	case SYS_FAN_MIN:
1105 		res = FAN_FROM_REG(data->fan_min[ix],
1106 				   ix < 4 ? 0 :
1107 				   FAN_TPC_FROM_REG(data->fan_opt[ix]));
1108 		break;
1109 	case SYS_FAN_MAX:
1110 		/* only valid for fan[5-6] */
1111 		res = FAN_MAX_FROM_REG(data->fan_max[ix - 4]);
1112 		break;
1113 	case SYS_FAN_ALARM:
1114 		res = (data->alarms >> DME1737_BIT_ALARM_FAN[ix]) & 0x01;
1115 		break;
1116 	case SYS_FAN_TYPE:
1117 		/* only valid for fan[1-4] */
1118 		res = FAN_TYPE_FROM_REG(data->fan_opt[ix]);
1119 		break;
1120 	default:
1121 		res = 0;
1122 		dev_dbg(dev, "Unknown function %d.\n", fn);
1123 	}
1124 
1125 	return sprintf(buf, "%d\n", res);
1126 }
1127 
1128 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
1129 		       const char *buf, size_t count)
1130 {
1131 	struct dme1737_data *data = dev_get_drvdata(dev);
1132 	struct sensor_device_attribute_2
1133 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
1134 	int ix = sensor_attr_2->index;
1135 	int fn = sensor_attr_2->nr;
1136 	long val;
1137 	int err;
1138 
1139 	err = kstrtol(buf, 10, &val);
1140 	if (err)
1141 		return err;
1142 
1143 	mutex_lock(&data->update_lock);
1144 	switch (fn) {
1145 	case SYS_FAN_MIN:
1146 		if (ix < 4) {
1147 			data->fan_min[ix] = FAN_TO_REG(val, 0);
1148 		} else {
1149 			/* Refresh the cache */
1150 			data->fan_opt[ix] = dme1737_read(data,
1151 						DME1737_REG_FAN_OPT(ix));
1152 			/* Modify the fan min value */
1153 			data->fan_min[ix] = FAN_TO_REG(val,
1154 					FAN_TPC_FROM_REG(data->fan_opt[ix]));
1155 		}
1156 		dme1737_write(data, DME1737_REG_FAN_MIN(ix),
1157 			      data->fan_min[ix] & 0xff);
1158 		dme1737_write(data, DME1737_REG_FAN_MIN(ix) + 1,
1159 			      data->fan_min[ix] >> 8);
1160 		break;
1161 	case SYS_FAN_MAX:
1162 		/* Only valid for fan[5-6] */
1163 		data->fan_max[ix - 4] = FAN_MAX_TO_REG(val);
1164 		dme1737_write(data, DME1737_REG_FAN_MAX(ix),
1165 			      data->fan_max[ix - 4]);
1166 		break;
1167 	case SYS_FAN_TYPE:
1168 		/* Only valid for fan[1-4] */
1169 		if (!(val == 1 || val == 2 || val == 4)) {
1170 			count = -EINVAL;
1171 			dev_warn(dev, "Fan type value %ld not "
1172 				 "supported. Choose one of 1, 2, or 4.\n",
1173 				 val);
1174 			goto exit;
1175 		}
1176 		data->fan_opt[ix] = FAN_TYPE_TO_REG(val, dme1737_read(data,
1177 					DME1737_REG_FAN_OPT(ix)));
1178 		dme1737_write(data, DME1737_REG_FAN_OPT(ix),
1179 			      data->fan_opt[ix]);
1180 		break;
1181 	default:
1182 		dev_dbg(dev, "Unknown function %d.\n", fn);
1183 	}
1184 exit:
1185 	mutex_unlock(&data->update_lock);
1186 
1187 	return count;
1188 }
1189 
1190 /* ---------------------------------------------------------------------
1191  * PWM sysfs attributes
1192  * ix = [0-4]
1193  * --------------------------------------------------------------------- */
1194 
1195 #define SYS_PWM				0
1196 #define SYS_PWM_FREQ			1
1197 #define SYS_PWM_ENABLE			2
1198 #define SYS_PWM_RAMP_RATE		3
1199 #define SYS_PWM_AUTO_CHANNELS_ZONE	4
1200 #define SYS_PWM_AUTO_PWM_MIN		5
1201 #define SYS_PWM_AUTO_POINT1_PWM		6
1202 #define SYS_PWM_AUTO_POINT2_PWM		7
1203 
1204 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
1205 			char *buf)
1206 {
1207 	struct dme1737_data *data = dme1737_update_device(dev);
1208 	struct sensor_device_attribute_2
1209 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
1210 	int ix = sensor_attr_2->index;
1211 	int fn = sensor_attr_2->nr;
1212 	int res;
1213 
1214 	switch (fn) {
1215 	case SYS_PWM:
1216 		if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 0)
1217 			res = 255;
1218 		else
1219 			res = data->pwm[ix];
1220 		break;
1221 	case SYS_PWM_FREQ:
1222 		res = PWM_FREQ_FROM_REG(data->pwm_freq[ix]);
1223 		break;
1224 	case SYS_PWM_ENABLE:
1225 		if (ix >= 3)
1226 			res = 1; /* pwm[5-6] hard-wired to manual mode */
1227 		else
1228 			res = PWM_EN_FROM_REG(data->pwm_config[ix]);
1229 		break;
1230 	case SYS_PWM_RAMP_RATE:
1231 		/* Only valid for pwm[1-3] */
1232 		res = PWM_RR_FROM_REG(data->pwm_rr[ix > 0], ix);
1233 		break;
1234 	case SYS_PWM_AUTO_CHANNELS_ZONE:
1235 		/* Only valid for pwm[1-3] */
1236 		if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2)
1237 			res = PWM_ACZ_FROM_REG(data->pwm_config[ix]);
1238 		else
1239 			res = data->pwm_acz[ix];
1240 		break;
1241 	case SYS_PWM_AUTO_PWM_MIN:
1242 		/* Only valid for pwm[1-3] */
1243 		if (PWM_OFF_FROM_REG(data->pwm_rr[0], ix))
1244 			res = data->pwm_min[ix];
1245 		else
1246 			res = 0;
1247 		break;
1248 	case SYS_PWM_AUTO_POINT1_PWM:
1249 		/* Only valid for pwm[1-3] */
1250 		res = data->pwm_min[ix];
1251 		break;
1252 	case SYS_PWM_AUTO_POINT2_PWM:
1253 		/* Only valid for pwm[1-3] */
1254 		res = 255; /* hard-wired */
1255 		break;
1256 	default:
1257 		res = 0;
1258 		dev_dbg(dev, "Unknown function %d.\n", fn);
1259 	}
1260 
1261 	return sprintf(buf, "%d\n", res);
1262 }
1263 
1264 static struct attribute *dme1737_pwm_chmod_attr[];
1265 static void dme1737_chmod_file(struct device*, struct attribute*, umode_t);
1266 
1267 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1268 		       const char *buf, size_t count)
1269 {
1270 	struct dme1737_data *data = dev_get_drvdata(dev);
1271 	struct sensor_device_attribute_2
1272 		*sensor_attr_2 = to_sensor_dev_attr_2(attr);
1273 	int ix = sensor_attr_2->index;
1274 	int fn = sensor_attr_2->nr;
1275 	long val;
1276 	int err;
1277 
1278 	err = kstrtol(buf, 10, &val);
1279 	if (err)
1280 		return err;
1281 
1282 	mutex_lock(&data->update_lock);
1283 	switch (fn) {
1284 	case SYS_PWM:
1285 		data->pwm[ix] = SENSORS_LIMIT(val, 0, 255);
1286 		dme1737_write(data, DME1737_REG_PWM(ix), data->pwm[ix]);
1287 		break;
1288 	case SYS_PWM_FREQ:
1289 		data->pwm_freq[ix] = PWM_FREQ_TO_REG(val, dme1737_read(data,
1290 						DME1737_REG_PWM_FREQ(ix)));
1291 		dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
1292 			      data->pwm_freq[ix]);
1293 		break;
1294 	case SYS_PWM_ENABLE:
1295 		/* Only valid for pwm[1-3] */
1296 		if (val < 0 || val > 2) {
1297 			count = -EINVAL;
1298 			dev_warn(dev, "PWM enable %ld not "
1299 				 "supported. Choose one of 0, 1, or 2.\n",
1300 				 val);
1301 			goto exit;
1302 		}
1303 		/* Refresh the cache */
1304 		data->pwm_config[ix] = dme1737_read(data,
1305 						DME1737_REG_PWM_CONFIG(ix));
1306 		if (val == PWM_EN_FROM_REG(data->pwm_config[ix])) {
1307 			/* Bail out if no change */
1308 			goto exit;
1309 		}
1310 		/* Do some housekeeping if we are currently in auto mode */
1311 		if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1312 			/* Save the current zone channel assignment */
1313 			data->pwm_acz[ix] = PWM_ACZ_FROM_REG(
1314 							data->pwm_config[ix]);
1315 			/* Save the current ramp rate state and disable it */
1316 			data->pwm_rr[ix > 0] = dme1737_read(data,
1317 						DME1737_REG_PWM_RR(ix > 0));
1318 			data->pwm_rr_en &= ~(1 << ix);
1319 			if (PWM_RR_EN_FROM_REG(data->pwm_rr[ix > 0], ix)) {
1320 				data->pwm_rr_en |= (1 << ix);
1321 				data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(0, ix,
1322 							data->pwm_rr[ix > 0]);
1323 				dme1737_write(data,
1324 					      DME1737_REG_PWM_RR(ix > 0),
1325 					      data->pwm_rr[ix > 0]);
1326 			}
1327 		}
1328 		/* Set the new PWM mode */
1329 		switch (val) {
1330 		case 0:
1331 			/* Change permissions of pwm[ix] to read-only */
1332 			dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1333 					   S_IRUGO);
1334 			/* Turn fan fully on */
1335 			data->pwm_config[ix] = PWM_EN_TO_REG(0,
1336 							data->pwm_config[ix]);
1337 			dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1338 				      data->pwm_config[ix]);
1339 			break;
1340 		case 1:
1341 			/* Turn on manual mode */
1342 			data->pwm_config[ix] = PWM_EN_TO_REG(1,
1343 							data->pwm_config[ix]);
1344 			dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1345 				      data->pwm_config[ix]);
1346 			/* Change permissions of pwm[ix] to read-writeable */
1347 			dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1348 					   S_IRUGO | S_IWUSR);
1349 			break;
1350 		case 2:
1351 			/* Change permissions of pwm[ix] to read-only */
1352 			dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1353 					   S_IRUGO);
1354 			/*
1355 			 * Turn on auto mode using the saved zone channel
1356 			 * assignment
1357 			 */
1358 			data->pwm_config[ix] = PWM_ACZ_TO_REG(
1359 							data->pwm_acz[ix],
1360 							data->pwm_config[ix]);
1361 			dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1362 				      data->pwm_config[ix]);
1363 			/* Enable PWM ramp rate if previously enabled */
1364 			if (data->pwm_rr_en & (1 << ix)) {
1365 				data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(1, ix,
1366 						dme1737_read(data,
1367 						DME1737_REG_PWM_RR(ix > 0)));
1368 				dme1737_write(data,
1369 					      DME1737_REG_PWM_RR(ix > 0),
1370 					      data->pwm_rr[ix > 0]);
1371 			}
1372 			break;
1373 		}
1374 		break;
1375 	case SYS_PWM_RAMP_RATE:
1376 		/* Only valid for pwm[1-3] */
1377 		/* Refresh the cache */
1378 		data->pwm_config[ix] = dme1737_read(data,
1379 						DME1737_REG_PWM_CONFIG(ix));
1380 		data->pwm_rr[ix > 0] = dme1737_read(data,
1381 						DME1737_REG_PWM_RR(ix > 0));
1382 		/* Set the ramp rate value */
1383 		if (val > 0) {
1384 			data->pwm_rr[ix > 0] = PWM_RR_TO_REG(val, ix,
1385 							data->pwm_rr[ix > 0]);
1386 		}
1387 		/*
1388 		 * Enable/disable the feature only if the associated PWM
1389 		 * output is in automatic mode.
1390 		 */
1391 		if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1392 			data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(val > 0, ix,
1393 							data->pwm_rr[ix > 0]);
1394 		}
1395 		dme1737_write(data, DME1737_REG_PWM_RR(ix > 0),
1396 			      data->pwm_rr[ix > 0]);
1397 		break;
1398 	case SYS_PWM_AUTO_CHANNELS_ZONE:
1399 		/* Only valid for pwm[1-3] */
1400 		if (!(val == 1 || val == 2 || val == 4 ||
1401 		      val == 6 || val == 7)) {
1402 			count = -EINVAL;
1403 			dev_warn(dev, "PWM auto channels zone %ld "
1404 				 "not supported. Choose one of 1, 2, 4, 6, "
1405 				 "or 7.\n", val);
1406 			goto exit;
1407 		}
1408 		/* Refresh the cache */
1409 		data->pwm_config[ix] = dme1737_read(data,
1410 						DME1737_REG_PWM_CONFIG(ix));
1411 		if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1412 			/*
1413 			 * PWM is already in auto mode so update the temp
1414 			 * channel assignment
1415 			 */
1416 			data->pwm_config[ix] = PWM_ACZ_TO_REG(val,
1417 						data->pwm_config[ix]);
1418 			dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1419 				      data->pwm_config[ix]);
1420 		} else {
1421 			/*
1422 			 * PWM is not in auto mode so we save the temp
1423 			 * channel assignment for later use
1424 			 */
1425 			data->pwm_acz[ix] = val;
1426 		}
1427 		break;
1428 	case SYS_PWM_AUTO_PWM_MIN:
1429 		/* Only valid for pwm[1-3] */
1430 		/* Refresh the cache */
1431 		data->pwm_min[ix] = dme1737_read(data,
1432 						DME1737_REG_PWM_MIN(ix));
1433 		/*
1434 		 * There are only 2 values supported for the auto_pwm_min
1435 		 * value: 0 or auto_point1_pwm. So if the temperature drops
1436 		 * below the auto_point1_temp_hyst value, the fan either turns
1437 		 * off or runs at auto_point1_pwm duty-cycle.
1438 		 */
1439 		if (val > ((data->pwm_min[ix] + 1) / 2)) {
1440 			data->pwm_rr[0] = PWM_OFF_TO_REG(1, ix,
1441 						dme1737_read(data,
1442 						DME1737_REG_PWM_RR(0)));
1443 		} else {
1444 			data->pwm_rr[0] = PWM_OFF_TO_REG(0, ix,
1445 						dme1737_read(data,
1446 						DME1737_REG_PWM_RR(0)));
1447 		}
1448 		dme1737_write(data, DME1737_REG_PWM_RR(0),
1449 			      data->pwm_rr[0]);
1450 		break;
1451 	case SYS_PWM_AUTO_POINT1_PWM:
1452 		/* Only valid for pwm[1-3] */
1453 		data->pwm_min[ix] = SENSORS_LIMIT(val, 0, 255);
1454 		dme1737_write(data, DME1737_REG_PWM_MIN(ix),
1455 			      data->pwm_min[ix]);
1456 		break;
1457 	default:
1458 		dev_dbg(dev, "Unknown function %d.\n", fn);
1459 	}
1460 exit:
1461 	mutex_unlock(&data->update_lock);
1462 
1463 	return count;
1464 }
1465 
1466 /* ---------------------------------------------------------------------
1467  * Miscellaneous sysfs attributes
1468  * --------------------------------------------------------------------- */
1469 
1470 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
1471 			char *buf)
1472 {
1473 	struct i2c_client *client = to_i2c_client(dev);
1474 	struct dme1737_data *data = i2c_get_clientdata(client);
1475 
1476 	return sprintf(buf, "%d\n", data->vrm);
1477 }
1478 
1479 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
1480 		       const char *buf, size_t count)
1481 {
1482 	struct dme1737_data *data = dev_get_drvdata(dev);
1483 	long val;
1484 	int err;
1485 
1486 	err = kstrtol(buf, 10, &val);
1487 	if (err)
1488 		return err;
1489 
1490 	data->vrm = val;
1491 	return count;
1492 }
1493 
1494 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
1495 			char *buf)
1496 {
1497 	struct dme1737_data *data = dme1737_update_device(dev);
1498 
1499 	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1500 }
1501 
1502 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
1503 			 char *buf)
1504 {
1505 	struct dme1737_data *data = dev_get_drvdata(dev);
1506 
1507 	return sprintf(buf, "%s\n", data->name);
1508 }
1509 
1510 /* ---------------------------------------------------------------------
1511  * Sysfs device attribute defines and structs
1512  * --------------------------------------------------------------------- */
1513 
1514 /* Voltages 0-7 */
1515 
1516 #define SENSOR_DEVICE_ATTR_IN(ix) \
1517 static SENSOR_DEVICE_ATTR_2(in##ix##_input, S_IRUGO, \
1518 	show_in, NULL, SYS_IN_INPUT, ix); \
1519 static SENSOR_DEVICE_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
1520 	show_in, set_in, SYS_IN_MIN, ix); \
1521 static SENSOR_DEVICE_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
1522 	show_in, set_in, SYS_IN_MAX, ix); \
1523 static SENSOR_DEVICE_ATTR_2(in##ix##_alarm, S_IRUGO, \
1524 	show_in, NULL, SYS_IN_ALARM, ix)
1525 
1526 SENSOR_DEVICE_ATTR_IN(0);
1527 SENSOR_DEVICE_ATTR_IN(1);
1528 SENSOR_DEVICE_ATTR_IN(2);
1529 SENSOR_DEVICE_ATTR_IN(3);
1530 SENSOR_DEVICE_ATTR_IN(4);
1531 SENSOR_DEVICE_ATTR_IN(5);
1532 SENSOR_DEVICE_ATTR_IN(6);
1533 SENSOR_DEVICE_ATTR_IN(7);
1534 
1535 /* Temperatures 1-3 */
1536 
1537 #define SENSOR_DEVICE_ATTR_TEMP(ix) \
1538 static SENSOR_DEVICE_ATTR_2(temp##ix##_input, S_IRUGO, \
1539 	show_temp, NULL, SYS_TEMP_INPUT, ix-1); \
1540 static SENSOR_DEVICE_ATTR_2(temp##ix##_min, S_IRUGO | S_IWUSR, \
1541 	show_temp, set_temp, SYS_TEMP_MIN, ix-1); \
1542 static SENSOR_DEVICE_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
1543 	show_temp, set_temp, SYS_TEMP_MAX, ix-1); \
1544 static SENSOR_DEVICE_ATTR_2(temp##ix##_offset, S_IRUGO, \
1545 	show_temp, set_temp, SYS_TEMP_OFFSET, ix-1); \
1546 static SENSOR_DEVICE_ATTR_2(temp##ix##_alarm, S_IRUGO, \
1547 	show_temp, NULL, SYS_TEMP_ALARM, ix-1); \
1548 static SENSOR_DEVICE_ATTR_2(temp##ix##_fault, S_IRUGO, \
1549 	show_temp, NULL, SYS_TEMP_FAULT, ix-1)
1550 
1551 SENSOR_DEVICE_ATTR_TEMP(1);
1552 SENSOR_DEVICE_ATTR_TEMP(2);
1553 SENSOR_DEVICE_ATTR_TEMP(3);
1554 
1555 /* Zones 1-3 */
1556 
1557 #define SENSOR_DEVICE_ATTR_ZONE(ix) \
1558 static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_channels_temp, S_IRUGO, \
1559 	show_zone, NULL, SYS_ZONE_AUTO_CHANNELS_TEMP, ix-1); \
1560 static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp_hyst, S_IRUGO, \
1561 	show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP_HYST, ix-1); \
1562 static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp, S_IRUGO, \
1563 	show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP, ix-1); \
1564 static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point2_temp, S_IRUGO, \
1565 	show_zone, set_zone, SYS_ZONE_AUTO_POINT2_TEMP, ix-1); \
1566 static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point3_temp, S_IRUGO, \
1567 	show_zone, set_zone, SYS_ZONE_AUTO_POINT3_TEMP, ix-1)
1568 
1569 SENSOR_DEVICE_ATTR_ZONE(1);
1570 SENSOR_DEVICE_ATTR_ZONE(2);
1571 SENSOR_DEVICE_ATTR_ZONE(3);
1572 
1573 /* Fans 1-4 */
1574 
1575 #define SENSOR_DEVICE_ATTR_FAN_1TO4(ix) \
1576 static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
1577 	show_fan, NULL, SYS_FAN_INPUT, ix-1); \
1578 static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1579 	show_fan, set_fan, SYS_FAN_MIN, ix-1); \
1580 static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1581 	show_fan, NULL, SYS_FAN_ALARM, ix-1); \
1582 static SENSOR_DEVICE_ATTR_2(fan##ix##_type, S_IRUGO | S_IWUSR, \
1583 	show_fan, set_fan, SYS_FAN_TYPE, ix-1)
1584 
1585 SENSOR_DEVICE_ATTR_FAN_1TO4(1);
1586 SENSOR_DEVICE_ATTR_FAN_1TO4(2);
1587 SENSOR_DEVICE_ATTR_FAN_1TO4(3);
1588 SENSOR_DEVICE_ATTR_FAN_1TO4(4);
1589 
1590 /* Fans 5-6 */
1591 
1592 #define SENSOR_DEVICE_ATTR_FAN_5TO6(ix) \
1593 static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
1594 	show_fan, NULL, SYS_FAN_INPUT, ix-1); \
1595 static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1596 	show_fan, set_fan, SYS_FAN_MIN, ix-1); \
1597 static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1598 	show_fan, NULL, SYS_FAN_ALARM, ix-1); \
1599 static SENSOR_DEVICE_ATTR_2(fan##ix##_max, S_IRUGO | S_IWUSR, \
1600 	show_fan, set_fan, SYS_FAN_MAX, ix-1)
1601 
1602 SENSOR_DEVICE_ATTR_FAN_5TO6(5);
1603 SENSOR_DEVICE_ATTR_FAN_5TO6(6);
1604 
1605 /* PWMs 1-3 */
1606 
1607 #define SENSOR_DEVICE_ATTR_PWM_1TO3(ix) \
1608 static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO, \
1609 	show_pwm, set_pwm, SYS_PWM, ix-1); \
1610 static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1611 	show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
1612 static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
1613 	show_pwm, set_pwm, SYS_PWM_ENABLE, ix-1); \
1614 static SENSOR_DEVICE_ATTR_2(pwm##ix##_ramp_rate, S_IRUGO, \
1615 	show_pwm, set_pwm, SYS_PWM_RAMP_RATE, ix-1); \
1616 static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_channels_zone, S_IRUGO, \
1617 	show_pwm, set_pwm, SYS_PWM_AUTO_CHANNELS_ZONE, ix-1); \
1618 static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_pwm_min, S_IRUGO, \
1619 	show_pwm, set_pwm, SYS_PWM_AUTO_PWM_MIN, ix-1); \
1620 static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point1_pwm, S_IRUGO, \
1621 	show_pwm, set_pwm, SYS_PWM_AUTO_POINT1_PWM, ix-1); \
1622 static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point2_pwm, S_IRUGO, \
1623 	show_pwm, NULL, SYS_PWM_AUTO_POINT2_PWM, ix-1)
1624 
1625 SENSOR_DEVICE_ATTR_PWM_1TO3(1);
1626 SENSOR_DEVICE_ATTR_PWM_1TO3(2);
1627 SENSOR_DEVICE_ATTR_PWM_1TO3(3);
1628 
1629 /* PWMs 5-6 */
1630 
1631 #define SENSOR_DEVICE_ATTR_PWM_5TO6(ix) \
1632 static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO, \
1633 	show_pwm, set_pwm, SYS_PWM, ix-1); \
1634 static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1635 	show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
1636 static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
1637 	show_pwm, NULL, SYS_PWM_ENABLE, ix-1)
1638 
1639 SENSOR_DEVICE_ATTR_PWM_5TO6(5);
1640 SENSOR_DEVICE_ATTR_PWM_5TO6(6);
1641 
1642 /* Misc */
1643 
1644 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
1645 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1646 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);   /* for ISA devices */
1647 
1648 /*
1649  * This struct holds all the attributes that are always present and need to be
1650  * created unconditionally. The attributes that need modification of their
1651  * permissions are created read-only and write permissions are added or removed
1652  * on the fly when required
1653  */
1654 static struct attribute *dme1737_attr[] = {
1655 	/* Voltages */
1656 	&sensor_dev_attr_in0_input.dev_attr.attr,
1657 	&sensor_dev_attr_in0_min.dev_attr.attr,
1658 	&sensor_dev_attr_in0_max.dev_attr.attr,
1659 	&sensor_dev_attr_in0_alarm.dev_attr.attr,
1660 	&sensor_dev_attr_in1_input.dev_attr.attr,
1661 	&sensor_dev_attr_in1_min.dev_attr.attr,
1662 	&sensor_dev_attr_in1_max.dev_attr.attr,
1663 	&sensor_dev_attr_in1_alarm.dev_attr.attr,
1664 	&sensor_dev_attr_in2_input.dev_attr.attr,
1665 	&sensor_dev_attr_in2_min.dev_attr.attr,
1666 	&sensor_dev_attr_in2_max.dev_attr.attr,
1667 	&sensor_dev_attr_in2_alarm.dev_attr.attr,
1668 	&sensor_dev_attr_in3_input.dev_attr.attr,
1669 	&sensor_dev_attr_in3_min.dev_attr.attr,
1670 	&sensor_dev_attr_in3_max.dev_attr.attr,
1671 	&sensor_dev_attr_in3_alarm.dev_attr.attr,
1672 	&sensor_dev_attr_in4_input.dev_attr.attr,
1673 	&sensor_dev_attr_in4_min.dev_attr.attr,
1674 	&sensor_dev_attr_in4_max.dev_attr.attr,
1675 	&sensor_dev_attr_in4_alarm.dev_attr.attr,
1676 	&sensor_dev_attr_in5_input.dev_attr.attr,
1677 	&sensor_dev_attr_in5_min.dev_attr.attr,
1678 	&sensor_dev_attr_in5_max.dev_attr.attr,
1679 	&sensor_dev_attr_in5_alarm.dev_attr.attr,
1680 	&sensor_dev_attr_in6_input.dev_attr.attr,
1681 	&sensor_dev_attr_in6_min.dev_attr.attr,
1682 	&sensor_dev_attr_in6_max.dev_attr.attr,
1683 	&sensor_dev_attr_in6_alarm.dev_attr.attr,
1684 	/* Temperatures */
1685 	&sensor_dev_attr_temp1_input.dev_attr.attr,
1686 	&sensor_dev_attr_temp1_min.dev_attr.attr,
1687 	&sensor_dev_attr_temp1_max.dev_attr.attr,
1688 	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
1689 	&sensor_dev_attr_temp1_fault.dev_attr.attr,
1690 	&sensor_dev_attr_temp2_input.dev_attr.attr,
1691 	&sensor_dev_attr_temp2_min.dev_attr.attr,
1692 	&sensor_dev_attr_temp2_max.dev_attr.attr,
1693 	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
1694 	&sensor_dev_attr_temp2_fault.dev_attr.attr,
1695 	&sensor_dev_attr_temp3_input.dev_attr.attr,
1696 	&sensor_dev_attr_temp3_min.dev_attr.attr,
1697 	&sensor_dev_attr_temp3_max.dev_attr.attr,
1698 	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
1699 	&sensor_dev_attr_temp3_fault.dev_attr.attr,
1700 	/* Zones */
1701 	&sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
1702 	&sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
1703 	&sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
1704 	&sensor_dev_attr_zone1_auto_channels_temp.dev_attr.attr,
1705 	&sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
1706 	&sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
1707 	&sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
1708 	&sensor_dev_attr_zone2_auto_channels_temp.dev_attr.attr,
1709 	NULL
1710 };
1711 
1712 static const struct attribute_group dme1737_group = {
1713 	.attrs = dme1737_attr,
1714 };
1715 
1716 /*
1717  * The following struct holds temp offset attributes, which are not available
1718  * in all chips. The following chips support them:
1719  * DME1737, SCH311x
1720  */
1721 static struct attribute *dme1737_temp_offset_attr[] = {
1722 	&sensor_dev_attr_temp1_offset.dev_attr.attr,
1723 	&sensor_dev_attr_temp2_offset.dev_attr.attr,
1724 	&sensor_dev_attr_temp3_offset.dev_attr.attr,
1725 	NULL
1726 };
1727 
1728 static const struct attribute_group dme1737_temp_offset_group = {
1729 	.attrs = dme1737_temp_offset_attr,
1730 };
1731 
1732 /*
1733  * The following struct holds VID related attributes, which are not available
1734  * in all chips. The following chips support them:
1735  * DME1737
1736  */
1737 static struct attribute *dme1737_vid_attr[] = {
1738 	&dev_attr_vrm.attr,
1739 	&dev_attr_cpu0_vid.attr,
1740 	NULL
1741 };
1742 
1743 static const struct attribute_group dme1737_vid_group = {
1744 	.attrs = dme1737_vid_attr,
1745 };
1746 
1747 /*
1748  * The following struct holds temp zone 3 related attributes, which are not
1749  * available in all chips. The following chips support them:
1750  * DME1737, SCH311x, SCH5027
1751  */
1752 static struct attribute *dme1737_zone3_attr[] = {
1753 	&sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
1754 	&sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
1755 	&sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
1756 	&sensor_dev_attr_zone3_auto_channels_temp.dev_attr.attr,
1757 	NULL
1758 };
1759 
1760 static const struct attribute_group dme1737_zone3_group = {
1761 	.attrs = dme1737_zone3_attr,
1762 };
1763 
1764 
1765 /*
1766  * The following struct holds temp zone hysteresis related attributes, which
1767  * are not available in all chips. The following chips support them:
1768  * DME1737, SCH311x
1769  */
1770 static struct attribute *dme1737_zone_hyst_attr[] = {
1771 	&sensor_dev_attr_zone1_auto_point1_temp_hyst.dev_attr.attr,
1772 	&sensor_dev_attr_zone2_auto_point1_temp_hyst.dev_attr.attr,
1773 	&sensor_dev_attr_zone3_auto_point1_temp_hyst.dev_attr.attr,
1774 	NULL
1775 };
1776 
1777 static const struct attribute_group dme1737_zone_hyst_group = {
1778 	.attrs = dme1737_zone_hyst_attr,
1779 };
1780 
1781 /*
1782  * The following struct holds voltage in7 related attributes, which
1783  * are not available in all chips. The following chips support them:
1784  * SCH5127
1785  */
1786 static struct attribute *dme1737_in7_attr[] = {
1787 	&sensor_dev_attr_in7_input.dev_attr.attr,
1788 	&sensor_dev_attr_in7_min.dev_attr.attr,
1789 	&sensor_dev_attr_in7_max.dev_attr.attr,
1790 	&sensor_dev_attr_in7_alarm.dev_attr.attr,
1791 	NULL
1792 };
1793 
1794 static const struct attribute_group dme1737_in7_group = {
1795 	.attrs = dme1737_in7_attr,
1796 };
1797 
1798 /*
1799  * The following structs hold the PWM attributes, some of which are optional.
1800  * Their creation depends on the chip configuration which is determined during
1801  * module load.
1802  */
1803 static struct attribute *dme1737_pwm1_attr[] = {
1804 	&sensor_dev_attr_pwm1.dev_attr.attr,
1805 	&sensor_dev_attr_pwm1_freq.dev_attr.attr,
1806 	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
1807 	&sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
1808 	&sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
1809 	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1810 	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1811 	NULL
1812 };
1813 static struct attribute *dme1737_pwm2_attr[] = {
1814 	&sensor_dev_attr_pwm2.dev_attr.attr,
1815 	&sensor_dev_attr_pwm2_freq.dev_attr.attr,
1816 	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
1817 	&sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
1818 	&sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
1819 	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1820 	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1821 	NULL
1822 };
1823 static struct attribute *dme1737_pwm3_attr[] = {
1824 	&sensor_dev_attr_pwm3.dev_attr.attr,
1825 	&sensor_dev_attr_pwm3_freq.dev_attr.attr,
1826 	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
1827 	&sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
1828 	&sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
1829 	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1830 	&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1831 	NULL
1832 };
1833 static struct attribute *dme1737_pwm5_attr[] = {
1834 	&sensor_dev_attr_pwm5.dev_attr.attr,
1835 	&sensor_dev_attr_pwm5_freq.dev_attr.attr,
1836 	&sensor_dev_attr_pwm5_enable.dev_attr.attr,
1837 	NULL
1838 };
1839 static struct attribute *dme1737_pwm6_attr[] = {
1840 	&sensor_dev_attr_pwm6.dev_attr.attr,
1841 	&sensor_dev_attr_pwm6_freq.dev_attr.attr,
1842 	&sensor_dev_attr_pwm6_enable.dev_attr.attr,
1843 	NULL
1844 };
1845 
1846 static const struct attribute_group dme1737_pwm_group[] = {
1847 	{ .attrs = dme1737_pwm1_attr },
1848 	{ .attrs = dme1737_pwm2_attr },
1849 	{ .attrs = dme1737_pwm3_attr },
1850 	{ .attrs = NULL },
1851 	{ .attrs = dme1737_pwm5_attr },
1852 	{ .attrs = dme1737_pwm6_attr },
1853 };
1854 
1855 /*
1856  * The following struct holds auto PWM min attributes, which are not available
1857  * in all chips. Their creation depends on the chip type which is determined
1858  * during module load.
1859  */
1860 static struct attribute *dme1737_auto_pwm_min_attr[] = {
1861 	&sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1862 	&sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1863 	&sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1864 };
1865 
1866 /*
1867  * The following structs hold the fan attributes, some of which are optional.
1868  * Their creation depends on the chip configuration which is determined during
1869  * module load.
1870  */
1871 static struct attribute *dme1737_fan1_attr[] = {
1872 	&sensor_dev_attr_fan1_input.dev_attr.attr,
1873 	&sensor_dev_attr_fan1_min.dev_attr.attr,
1874 	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
1875 	&sensor_dev_attr_fan1_type.dev_attr.attr,
1876 	NULL
1877 };
1878 static struct attribute *dme1737_fan2_attr[] = {
1879 	&sensor_dev_attr_fan2_input.dev_attr.attr,
1880 	&sensor_dev_attr_fan2_min.dev_attr.attr,
1881 	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
1882 	&sensor_dev_attr_fan2_type.dev_attr.attr,
1883 	NULL
1884 };
1885 static struct attribute *dme1737_fan3_attr[] = {
1886 	&sensor_dev_attr_fan3_input.dev_attr.attr,
1887 	&sensor_dev_attr_fan3_min.dev_attr.attr,
1888 	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
1889 	&sensor_dev_attr_fan3_type.dev_attr.attr,
1890 	NULL
1891 };
1892 static struct attribute *dme1737_fan4_attr[] = {
1893 	&sensor_dev_attr_fan4_input.dev_attr.attr,
1894 	&sensor_dev_attr_fan4_min.dev_attr.attr,
1895 	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
1896 	&sensor_dev_attr_fan4_type.dev_attr.attr,
1897 	NULL
1898 };
1899 static struct attribute *dme1737_fan5_attr[] = {
1900 	&sensor_dev_attr_fan5_input.dev_attr.attr,
1901 	&sensor_dev_attr_fan5_min.dev_attr.attr,
1902 	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
1903 	&sensor_dev_attr_fan5_max.dev_attr.attr,
1904 	NULL
1905 };
1906 static struct attribute *dme1737_fan6_attr[] = {
1907 	&sensor_dev_attr_fan6_input.dev_attr.attr,
1908 	&sensor_dev_attr_fan6_min.dev_attr.attr,
1909 	&sensor_dev_attr_fan6_alarm.dev_attr.attr,
1910 	&sensor_dev_attr_fan6_max.dev_attr.attr,
1911 	NULL
1912 };
1913 
1914 static const struct attribute_group dme1737_fan_group[] = {
1915 	{ .attrs = dme1737_fan1_attr },
1916 	{ .attrs = dme1737_fan2_attr },
1917 	{ .attrs = dme1737_fan3_attr },
1918 	{ .attrs = dme1737_fan4_attr },
1919 	{ .attrs = dme1737_fan5_attr },
1920 	{ .attrs = dme1737_fan6_attr },
1921 };
1922 
1923 /*
1924  * The permissions of the following zone attributes are changed to read-
1925  * writeable if the chip is *not* locked. Otherwise they stay read-only.
1926  */
1927 static struct attribute *dme1737_zone_chmod_attr[] = {
1928 	&sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
1929 	&sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
1930 	&sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
1931 	&sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
1932 	&sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
1933 	&sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
1934 	NULL
1935 };
1936 
1937 static const struct attribute_group dme1737_zone_chmod_group = {
1938 	.attrs = dme1737_zone_chmod_attr,
1939 };
1940 
1941 
1942 /*
1943  * The permissions of the following zone 3 attributes are changed to read-
1944  * writeable if the chip is *not* locked. Otherwise they stay read-only.
1945  */
1946 static struct attribute *dme1737_zone3_chmod_attr[] = {
1947 	&sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
1948 	&sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
1949 	&sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
1950 	NULL
1951 };
1952 
1953 static const struct attribute_group dme1737_zone3_chmod_group = {
1954 	.attrs = dme1737_zone3_chmod_attr,
1955 };
1956 
1957 /*
1958  * The permissions of the following PWM attributes are changed to read-
1959  * writeable if the chip is *not* locked and the respective PWM is available.
1960  * Otherwise they stay read-only.
1961  */
1962 static struct attribute *dme1737_pwm1_chmod_attr[] = {
1963 	&sensor_dev_attr_pwm1_freq.dev_attr.attr,
1964 	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
1965 	&sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
1966 	&sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
1967 	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1968 	NULL
1969 };
1970 static struct attribute *dme1737_pwm2_chmod_attr[] = {
1971 	&sensor_dev_attr_pwm2_freq.dev_attr.attr,
1972 	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
1973 	&sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
1974 	&sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
1975 	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1976 	NULL
1977 };
1978 static struct attribute *dme1737_pwm3_chmod_attr[] = {
1979 	&sensor_dev_attr_pwm3_freq.dev_attr.attr,
1980 	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
1981 	&sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
1982 	&sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
1983 	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1984 	NULL
1985 };
1986 static struct attribute *dme1737_pwm5_chmod_attr[] = {
1987 	&sensor_dev_attr_pwm5.dev_attr.attr,
1988 	&sensor_dev_attr_pwm5_freq.dev_attr.attr,
1989 	NULL
1990 };
1991 static struct attribute *dme1737_pwm6_chmod_attr[] = {
1992 	&sensor_dev_attr_pwm6.dev_attr.attr,
1993 	&sensor_dev_attr_pwm6_freq.dev_attr.attr,
1994 	NULL
1995 };
1996 
1997 static const struct attribute_group dme1737_pwm_chmod_group[] = {
1998 	{ .attrs = dme1737_pwm1_chmod_attr },
1999 	{ .attrs = dme1737_pwm2_chmod_attr },
2000 	{ .attrs = dme1737_pwm3_chmod_attr },
2001 	{ .attrs = NULL },
2002 	{ .attrs = dme1737_pwm5_chmod_attr },
2003 	{ .attrs = dme1737_pwm6_chmod_attr },
2004 };
2005 
2006 /*
2007  * Pwm[1-3] are read-writeable if the associated pwm is in manual mode and the
2008  * chip is not locked. Otherwise they are read-only.
2009  */
2010 static struct attribute *dme1737_pwm_chmod_attr[] = {
2011 	&sensor_dev_attr_pwm1.dev_attr.attr,
2012 	&sensor_dev_attr_pwm2.dev_attr.attr,
2013 	&sensor_dev_attr_pwm3.dev_attr.attr,
2014 };
2015 
2016 /* ---------------------------------------------------------------------
2017  * Super-IO functions
2018  * --------------------------------------------------------------------- */
2019 
2020 static inline void dme1737_sio_enter(int sio_cip)
2021 {
2022 	outb(0x55, sio_cip);
2023 }
2024 
2025 static inline void dme1737_sio_exit(int sio_cip)
2026 {
2027 	outb(0xaa, sio_cip);
2028 }
2029 
2030 static inline int dme1737_sio_inb(int sio_cip, int reg)
2031 {
2032 	outb(reg, sio_cip);
2033 	return inb(sio_cip + 1);
2034 }
2035 
2036 static inline void dme1737_sio_outb(int sio_cip, int reg, int val)
2037 {
2038 	outb(reg, sio_cip);
2039 	outb(val, sio_cip + 1);
2040 }
2041 
2042 /* ---------------------------------------------------------------------
2043  * Device initialization
2044  * --------------------------------------------------------------------- */
2045 
2046 static int dme1737_i2c_get_features(int, struct dme1737_data*);
2047 
2048 static void dme1737_chmod_file(struct device *dev,
2049 			       struct attribute *attr, umode_t mode)
2050 {
2051 	if (sysfs_chmod_file(&dev->kobj, attr, mode)) {
2052 		dev_warn(dev, "Failed to change permissions of %s.\n",
2053 			 attr->name);
2054 	}
2055 }
2056 
2057 static void dme1737_chmod_group(struct device *dev,
2058 				const struct attribute_group *group,
2059 				umode_t mode)
2060 {
2061 	struct attribute **attr;
2062 
2063 	for (attr = group->attrs; *attr; attr++)
2064 		dme1737_chmod_file(dev, *attr, mode);
2065 }
2066 
2067 static void dme1737_remove_files(struct device *dev)
2068 {
2069 	struct dme1737_data *data = dev_get_drvdata(dev);
2070 	int ix;
2071 
2072 	for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
2073 		if (data->has_features & HAS_FAN(ix)) {
2074 			sysfs_remove_group(&dev->kobj,
2075 					   &dme1737_fan_group[ix]);
2076 		}
2077 	}
2078 
2079 	for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
2080 		if (data->has_features & HAS_PWM(ix)) {
2081 			sysfs_remove_group(&dev->kobj,
2082 					   &dme1737_pwm_group[ix]);
2083 			if ((data->has_features & HAS_PWM_MIN) && ix < 3) {
2084 				sysfs_remove_file(&dev->kobj,
2085 						dme1737_auto_pwm_min_attr[ix]);
2086 			}
2087 		}
2088 	}
2089 
2090 	if (data->has_features & HAS_TEMP_OFFSET)
2091 		sysfs_remove_group(&dev->kobj, &dme1737_temp_offset_group);
2092 	if (data->has_features & HAS_VID)
2093 		sysfs_remove_group(&dev->kobj, &dme1737_vid_group);
2094 	if (data->has_features & HAS_ZONE3)
2095 		sysfs_remove_group(&dev->kobj, &dme1737_zone3_group);
2096 	if (data->has_features & HAS_ZONE_HYST)
2097 		sysfs_remove_group(&dev->kobj, &dme1737_zone_hyst_group);
2098 	if (data->has_features & HAS_IN7)
2099 		sysfs_remove_group(&dev->kobj, &dme1737_in7_group);
2100 	sysfs_remove_group(&dev->kobj, &dme1737_group);
2101 
2102 	if (!data->client)
2103 		sysfs_remove_file(&dev->kobj, &dev_attr_name.attr);
2104 }
2105 
2106 static int dme1737_create_files(struct device *dev)
2107 {
2108 	struct dme1737_data *data = dev_get_drvdata(dev);
2109 	int err, ix;
2110 
2111 	/* Create a name attribute for ISA devices */
2112 	if (!data->client) {
2113 		err = sysfs_create_file(&dev->kobj, &dev_attr_name.attr);
2114 		if (err)
2115 			goto exit;
2116 	}
2117 
2118 	/* Create standard sysfs attributes */
2119 	err = sysfs_create_group(&dev->kobj, &dme1737_group);
2120 	if (err)
2121 		goto exit_remove;
2122 
2123 	/* Create chip-dependent sysfs attributes */
2124 	if (data->has_features & HAS_TEMP_OFFSET) {
2125 		err = sysfs_create_group(&dev->kobj,
2126 					 &dme1737_temp_offset_group);
2127 		if (err)
2128 			goto exit_remove;
2129 	}
2130 	if (data->has_features & HAS_VID) {
2131 		err = sysfs_create_group(&dev->kobj, &dme1737_vid_group);
2132 		if (err)
2133 			goto exit_remove;
2134 	}
2135 	if (data->has_features & HAS_ZONE3) {
2136 		err = sysfs_create_group(&dev->kobj, &dme1737_zone3_group);
2137 		if (err)
2138 			goto exit_remove;
2139 	}
2140 	if (data->has_features & HAS_ZONE_HYST) {
2141 		err = sysfs_create_group(&dev->kobj, &dme1737_zone_hyst_group);
2142 		if (err)
2143 			goto exit_remove;
2144 	}
2145 	if (data->has_features & HAS_IN7) {
2146 		err = sysfs_create_group(&dev->kobj, &dme1737_in7_group);
2147 		if (err)
2148 			goto exit_remove;
2149 	}
2150 
2151 	/* Create fan sysfs attributes */
2152 	for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
2153 		if (data->has_features & HAS_FAN(ix)) {
2154 			err = sysfs_create_group(&dev->kobj,
2155 						 &dme1737_fan_group[ix]);
2156 			if (err)
2157 				goto exit_remove;
2158 		}
2159 	}
2160 
2161 	/* Create PWM sysfs attributes */
2162 	for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
2163 		if (data->has_features & HAS_PWM(ix)) {
2164 			err = sysfs_create_group(&dev->kobj,
2165 						 &dme1737_pwm_group[ix]);
2166 			if (err)
2167 				goto exit_remove;
2168 			if ((data->has_features & HAS_PWM_MIN) && (ix < 3)) {
2169 				err = sysfs_create_file(&dev->kobj,
2170 						dme1737_auto_pwm_min_attr[ix]);
2171 				if (err)
2172 					goto exit_remove;
2173 			}
2174 		}
2175 	}
2176 
2177 	/*
2178 	 * Inform if the device is locked. Otherwise change the permissions of
2179 	 * selected attributes from read-only to read-writeable.
2180 	 */
2181 	if (data->config & 0x02) {
2182 		dev_info(dev, "Device is locked. Some attributes "
2183 			 "will be read-only.\n");
2184 	} else {
2185 		/* Change permissions of zone sysfs attributes */
2186 		dme1737_chmod_group(dev, &dme1737_zone_chmod_group,
2187 				    S_IRUGO | S_IWUSR);
2188 
2189 		/* Change permissions of chip-dependent sysfs attributes */
2190 		if (data->has_features & HAS_TEMP_OFFSET) {
2191 			dme1737_chmod_group(dev, &dme1737_temp_offset_group,
2192 					    S_IRUGO | S_IWUSR);
2193 		}
2194 		if (data->has_features & HAS_ZONE3) {
2195 			dme1737_chmod_group(dev, &dme1737_zone3_chmod_group,
2196 					    S_IRUGO | S_IWUSR);
2197 		}
2198 		if (data->has_features & HAS_ZONE_HYST) {
2199 			dme1737_chmod_group(dev, &dme1737_zone_hyst_group,
2200 					    S_IRUGO | S_IWUSR);
2201 		}
2202 
2203 		/* Change permissions of PWM sysfs attributes */
2204 		for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_chmod_group); ix++) {
2205 			if (data->has_features & HAS_PWM(ix)) {
2206 				dme1737_chmod_group(dev,
2207 						&dme1737_pwm_chmod_group[ix],
2208 						S_IRUGO | S_IWUSR);
2209 				if ((data->has_features & HAS_PWM_MIN) &&
2210 				    ix < 3) {
2211 					dme1737_chmod_file(dev,
2212 						dme1737_auto_pwm_min_attr[ix],
2213 						S_IRUGO | S_IWUSR);
2214 				}
2215 			}
2216 		}
2217 
2218 		/* Change permissions of pwm[1-3] if in manual mode */
2219 		for (ix = 0; ix < 3; ix++) {
2220 			if ((data->has_features & HAS_PWM(ix)) &&
2221 			    (PWM_EN_FROM_REG(data->pwm_config[ix]) == 1)) {
2222 				dme1737_chmod_file(dev,
2223 						dme1737_pwm_chmod_attr[ix],
2224 						S_IRUGO | S_IWUSR);
2225 			}
2226 		}
2227 	}
2228 
2229 	return 0;
2230 
2231 exit_remove:
2232 	dme1737_remove_files(dev);
2233 exit:
2234 	return err;
2235 }
2236 
2237 static int dme1737_init_device(struct device *dev)
2238 {
2239 	struct dme1737_data *data = dev_get_drvdata(dev);
2240 	struct i2c_client *client = data->client;
2241 	int ix;
2242 	u8 reg;
2243 
2244 	/* Point to the right nominal voltages array */
2245 	data->in_nominal = IN_NOMINAL(data->type);
2246 
2247 	data->config = dme1737_read(data, DME1737_REG_CONFIG);
2248 	/* Inform if part is not monitoring/started */
2249 	if (!(data->config & 0x01)) {
2250 		if (!force_start) {
2251 			dev_err(dev, "Device is not monitoring. "
2252 				"Use the force_start load parameter to "
2253 				"override.\n");
2254 			return -EFAULT;
2255 		}
2256 
2257 		/* Force monitoring */
2258 		data->config |= 0x01;
2259 		dme1737_write(data, DME1737_REG_CONFIG, data->config);
2260 	}
2261 	/* Inform if part is not ready */
2262 	if (!(data->config & 0x04)) {
2263 		dev_err(dev, "Device is not ready.\n");
2264 		return -EFAULT;
2265 	}
2266 
2267 	/*
2268 	 * Determine which optional fan and pwm features are enabled (only
2269 	 * valid for I2C devices)
2270 	 */
2271 	if (client) {   /* I2C chip */
2272 		data->config2 = dme1737_read(data, DME1737_REG_CONFIG2);
2273 		/* Check if optional fan3 input is enabled */
2274 		if (data->config2 & 0x04)
2275 			data->has_features |= HAS_FAN(2);
2276 
2277 		/*
2278 		 * Fan4 and pwm3 are only available if the client's I2C address
2279 		 * is the default 0x2e. Otherwise the I/Os associated with
2280 		 * these functions are used for addr enable/select.
2281 		 */
2282 		if (client->addr == 0x2e)
2283 			data->has_features |= HAS_FAN(3) | HAS_PWM(2);
2284 
2285 		/*
2286 		 * Determine which of the optional fan[5-6] and pwm[5-6]
2287 		 * features are enabled. For this, we need to query the runtime
2288 		 * registers through the Super-IO LPC interface. Try both
2289 		 * config ports 0x2e and 0x4e.
2290 		 */
2291 		if (dme1737_i2c_get_features(0x2e, data) &&
2292 		    dme1737_i2c_get_features(0x4e, data)) {
2293 			dev_warn(dev, "Failed to query Super-IO for optional "
2294 				 "features.\n");
2295 		}
2296 	}
2297 
2298 	/* Fan[1-2] and pwm[1-2] are present in all chips */
2299 	data->has_features |= HAS_FAN(0) | HAS_FAN(1) | HAS_PWM(0) | HAS_PWM(1);
2300 
2301 	/* Chip-dependent features */
2302 	switch (data->type) {
2303 	case dme1737:
2304 		data->has_features |= HAS_TEMP_OFFSET | HAS_VID | HAS_ZONE3 |
2305 			HAS_ZONE_HYST | HAS_PWM_MIN;
2306 		break;
2307 	case sch311x:
2308 		data->has_features |= HAS_TEMP_OFFSET | HAS_ZONE3 |
2309 			HAS_ZONE_HYST | HAS_PWM_MIN | HAS_FAN(2) | HAS_PWM(2);
2310 		break;
2311 	case sch5027:
2312 		data->has_features |= HAS_ZONE3;
2313 		break;
2314 	case sch5127:
2315 		data->has_features |= HAS_FAN(2) | HAS_PWM(2) | HAS_IN7;
2316 		break;
2317 	default:
2318 		break;
2319 	}
2320 
2321 	dev_info(dev, "Optional features: pwm3=%s, pwm5=%s, pwm6=%s, "
2322 		 "fan3=%s, fan4=%s, fan5=%s, fan6=%s.\n",
2323 		 (data->has_features & HAS_PWM(2)) ? "yes" : "no",
2324 		 (data->has_features & HAS_PWM(4)) ? "yes" : "no",
2325 		 (data->has_features & HAS_PWM(5)) ? "yes" : "no",
2326 		 (data->has_features & HAS_FAN(2)) ? "yes" : "no",
2327 		 (data->has_features & HAS_FAN(3)) ? "yes" : "no",
2328 		 (data->has_features & HAS_FAN(4)) ? "yes" : "no",
2329 		 (data->has_features & HAS_FAN(5)) ? "yes" : "no");
2330 
2331 	reg = dme1737_read(data, DME1737_REG_TACH_PWM);
2332 	/* Inform if fan-to-pwm mapping differs from the default */
2333 	if (client && reg != 0xa4) {   /* I2C chip */
2334 		dev_warn(dev, "Non-standard fan to pwm mapping: "
2335 			 "fan1->pwm%d, fan2->pwm%d, fan3->pwm%d, "
2336 			 "fan4->pwm%d. Please report to the driver "
2337 			 "maintainer.\n",
2338 			 (reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
2339 			 ((reg >> 4) & 0x03) + 1, ((reg >> 6) & 0x03) + 1);
2340 	} else if (!client && reg != 0x24) {   /* ISA chip */
2341 		dev_warn(dev, "Non-standard fan to pwm mapping: "
2342 			 "fan1->pwm%d, fan2->pwm%d, fan3->pwm%d. "
2343 			 "Please report to the driver maintainer.\n",
2344 			 (reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
2345 			 ((reg >> 4) & 0x03) + 1);
2346 	}
2347 
2348 	/*
2349 	 * Switch pwm[1-3] to manual mode if they are currently disabled and
2350 	 * set the duty-cycles to 0% (which is identical to the PWMs being
2351 	 * disabled).
2352 	 */
2353 	if (!(data->config & 0x02)) {
2354 		for (ix = 0; ix < 3; ix++) {
2355 			data->pwm_config[ix] = dme1737_read(data,
2356 						DME1737_REG_PWM_CONFIG(ix));
2357 			if ((data->has_features & HAS_PWM(ix)) &&
2358 			    (PWM_EN_FROM_REG(data->pwm_config[ix]) == -1)) {
2359 				dev_info(dev, "Switching pwm%d to "
2360 					 "manual mode.\n", ix + 1);
2361 				data->pwm_config[ix] = PWM_EN_TO_REG(1,
2362 							data->pwm_config[ix]);
2363 				dme1737_write(data, DME1737_REG_PWM(ix), 0);
2364 				dme1737_write(data,
2365 					      DME1737_REG_PWM_CONFIG(ix),
2366 					      data->pwm_config[ix]);
2367 			}
2368 		}
2369 	}
2370 
2371 	/* Initialize the default PWM auto channels zone (acz) assignments */
2372 	data->pwm_acz[0] = 1;	/* pwm1 -> zone1 */
2373 	data->pwm_acz[1] = 2;	/* pwm2 -> zone2 */
2374 	data->pwm_acz[2] = 4;	/* pwm3 -> zone3 */
2375 
2376 	/* Set VRM */
2377 	if (data->has_features & HAS_VID)
2378 		data->vrm = vid_which_vrm();
2379 
2380 	return 0;
2381 }
2382 
2383 /* ---------------------------------------------------------------------
2384  * I2C device detection and registration
2385  * --------------------------------------------------------------------- */
2386 
2387 static struct i2c_driver dme1737_i2c_driver;
2388 
2389 static int dme1737_i2c_get_features(int sio_cip, struct dme1737_data *data)
2390 {
2391 	int err = 0, reg;
2392 	u16 addr;
2393 
2394 	dme1737_sio_enter(sio_cip);
2395 
2396 	/*
2397 	 * Check device ID
2398 	 * We currently know about two kinds of DME1737 and SCH5027.
2399 	 */
2400 	reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
2401 	if (!(reg == DME1737_ID_1 || reg == DME1737_ID_2 ||
2402 	      reg == SCH5027_ID)) {
2403 		err = -ENODEV;
2404 		goto exit;
2405 	}
2406 
2407 	/* Select logical device A (runtime registers) */
2408 	dme1737_sio_outb(sio_cip, 0x07, 0x0a);
2409 
2410 	/* Get the base address of the runtime registers */
2411 	addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
2412 		dme1737_sio_inb(sio_cip, 0x61);
2413 	if (!addr) {
2414 		err = -ENODEV;
2415 		goto exit;
2416 	}
2417 
2418 	/*
2419 	 * Read the runtime registers to determine which optional features
2420 	 * are enabled and available. Bits [3:2] of registers 0x43-0x46 are set
2421 	 * to '10' if the respective feature is enabled.
2422 	 */
2423 	if ((inb(addr + 0x43) & 0x0c) == 0x08) /* fan6 */
2424 		data->has_features |= HAS_FAN(5);
2425 	if ((inb(addr + 0x44) & 0x0c) == 0x08) /* pwm6 */
2426 		data->has_features |= HAS_PWM(5);
2427 	if ((inb(addr + 0x45) & 0x0c) == 0x08) /* fan5 */
2428 		data->has_features |= HAS_FAN(4);
2429 	if ((inb(addr + 0x46) & 0x0c) == 0x08) /* pwm5 */
2430 		data->has_features |= HAS_PWM(4);
2431 
2432 exit:
2433 	dme1737_sio_exit(sio_cip);
2434 
2435 	return err;
2436 }
2437 
2438 /* Return 0 if detection is successful, -ENODEV otherwise */
2439 static int dme1737_i2c_detect(struct i2c_client *client,
2440 			      struct i2c_board_info *info)
2441 {
2442 	struct i2c_adapter *adapter = client->adapter;
2443 	struct device *dev = &adapter->dev;
2444 	u8 company, verstep = 0;
2445 	const char *name;
2446 
2447 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
2448 		return -ENODEV;
2449 
2450 	company = i2c_smbus_read_byte_data(client, DME1737_REG_COMPANY);
2451 	verstep = i2c_smbus_read_byte_data(client, DME1737_REG_VERSTEP);
2452 
2453 	if (company == DME1737_COMPANY_SMSC &&
2454 	    verstep == SCH5027_VERSTEP) {
2455 		name = "sch5027";
2456 	} else if (company == DME1737_COMPANY_SMSC &&
2457 		   (verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP) {
2458 		name = "dme1737";
2459 	} else {
2460 		return -ENODEV;
2461 	}
2462 
2463 	dev_info(dev, "Found a %s chip at 0x%02x (rev 0x%02x).\n",
2464 		 verstep == SCH5027_VERSTEP ? "SCH5027" : "DME1737",
2465 		 client->addr, verstep);
2466 	strlcpy(info->type, name, I2C_NAME_SIZE);
2467 
2468 	return 0;
2469 }
2470 
2471 static int dme1737_i2c_probe(struct i2c_client *client,
2472 			     const struct i2c_device_id *id)
2473 {
2474 	struct dme1737_data *data;
2475 	struct device *dev = &client->dev;
2476 	int err;
2477 
2478 	data = devm_kzalloc(dev, sizeof(struct dme1737_data), GFP_KERNEL);
2479 	if (!data)
2480 		return -ENOMEM;
2481 
2482 	i2c_set_clientdata(client, data);
2483 	data->type = id->driver_data;
2484 	data->client = client;
2485 	data->name = client->name;
2486 	mutex_init(&data->update_lock);
2487 
2488 	/* Initialize the DME1737 chip */
2489 	err = dme1737_init_device(dev);
2490 	if (err) {
2491 		dev_err(dev, "Failed to initialize device.\n");
2492 		return err;
2493 	}
2494 
2495 	/* Create sysfs files */
2496 	err = dme1737_create_files(dev);
2497 	if (err) {
2498 		dev_err(dev, "Failed to create sysfs files.\n");
2499 		return err;
2500 	}
2501 
2502 	/* Register device */
2503 	data->hwmon_dev = hwmon_device_register(dev);
2504 	if (IS_ERR(data->hwmon_dev)) {
2505 		dev_err(dev, "Failed to register device.\n");
2506 		err = PTR_ERR(data->hwmon_dev);
2507 		goto exit_remove;
2508 	}
2509 
2510 	return 0;
2511 
2512 exit_remove:
2513 	dme1737_remove_files(dev);
2514 	return err;
2515 }
2516 
2517 static int dme1737_i2c_remove(struct i2c_client *client)
2518 {
2519 	struct dme1737_data *data = i2c_get_clientdata(client);
2520 
2521 	hwmon_device_unregister(data->hwmon_dev);
2522 	dme1737_remove_files(&client->dev);
2523 
2524 	return 0;
2525 }
2526 
2527 static const struct i2c_device_id dme1737_id[] = {
2528 	{ "dme1737", dme1737 },
2529 	{ "sch5027", sch5027 },
2530 	{ }
2531 };
2532 MODULE_DEVICE_TABLE(i2c, dme1737_id);
2533 
2534 static struct i2c_driver dme1737_i2c_driver = {
2535 	.class = I2C_CLASS_HWMON,
2536 	.driver = {
2537 		.name = "dme1737",
2538 	},
2539 	.probe = dme1737_i2c_probe,
2540 	.remove = dme1737_i2c_remove,
2541 	.id_table = dme1737_id,
2542 	.detect = dme1737_i2c_detect,
2543 	.address_list = normal_i2c,
2544 };
2545 
2546 /* ---------------------------------------------------------------------
2547  * ISA device detection and registration
2548  * --------------------------------------------------------------------- */
2549 
2550 static int __init dme1737_isa_detect(int sio_cip, unsigned short *addr)
2551 {
2552 	int err = 0, reg;
2553 	unsigned short base_addr;
2554 
2555 	dme1737_sio_enter(sio_cip);
2556 
2557 	/*
2558 	 * Check device ID
2559 	 * We currently know about SCH3112, SCH3114, SCH3116, and SCH5127
2560 	 */
2561 	reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
2562 	if (!(reg == SCH3112_ID || reg == SCH3114_ID || reg == SCH3116_ID ||
2563 	      reg == SCH5127_ID)) {
2564 		err = -ENODEV;
2565 		goto exit;
2566 	}
2567 
2568 	/* Select logical device A (runtime registers) */
2569 	dme1737_sio_outb(sio_cip, 0x07, 0x0a);
2570 
2571 	/* Get the base address of the runtime registers */
2572 	base_addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
2573 		     dme1737_sio_inb(sio_cip, 0x61);
2574 	if (!base_addr) {
2575 		pr_err("Base address not set\n");
2576 		err = -ENODEV;
2577 		goto exit;
2578 	}
2579 
2580 	/*
2581 	 * Access to the hwmon registers is through an index/data register
2582 	 * pair located at offset 0x70/0x71.
2583 	 */
2584 	*addr = base_addr + 0x70;
2585 
2586 exit:
2587 	dme1737_sio_exit(sio_cip);
2588 	return err;
2589 }
2590 
2591 static int __init dme1737_isa_device_add(unsigned short addr)
2592 {
2593 	struct resource res = {
2594 		.start	= addr,
2595 		.end	= addr + DME1737_EXTENT - 1,
2596 		.name	= "dme1737",
2597 		.flags	= IORESOURCE_IO,
2598 	};
2599 	int err;
2600 
2601 	err = acpi_check_resource_conflict(&res);
2602 	if (err)
2603 		goto exit;
2604 
2605 	pdev = platform_device_alloc("dme1737", addr);
2606 	if (!pdev) {
2607 		pr_err("Failed to allocate device\n");
2608 		err = -ENOMEM;
2609 		goto exit;
2610 	}
2611 
2612 	err = platform_device_add_resources(pdev, &res, 1);
2613 	if (err) {
2614 		pr_err("Failed to add device resource (err = %d)\n", err);
2615 		goto exit_device_put;
2616 	}
2617 
2618 	err = platform_device_add(pdev);
2619 	if (err) {
2620 		pr_err("Failed to add device (err = %d)\n", err);
2621 		goto exit_device_put;
2622 	}
2623 
2624 	return 0;
2625 
2626 exit_device_put:
2627 	platform_device_put(pdev);
2628 	pdev = NULL;
2629 exit:
2630 	return err;
2631 }
2632 
2633 static int __devinit dme1737_isa_probe(struct platform_device *pdev)
2634 {
2635 	u8 company, device;
2636 	struct resource *res;
2637 	struct dme1737_data *data;
2638 	struct device *dev = &pdev->dev;
2639 	int err;
2640 
2641 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2642 	if (!devm_request_region(dev, res->start, DME1737_EXTENT, "dme1737")) {
2643 		dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
2644 			(unsigned short)res->start,
2645 			(unsigned short)res->start + DME1737_EXTENT - 1);
2646 		return -EBUSY;
2647 	}
2648 
2649 	data = devm_kzalloc(dev, sizeof(struct dme1737_data), GFP_KERNEL);
2650 	if (!data)
2651 		return -ENOMEM;
2652 
2653 	data->addr = res->start;
2654 	platform_set_drvdata(pdev, data);
2655 
2656 	/* Skip chip detection if module is loaded with force_id parameter */
2657 	switch (force_id) {
2658 	case SCH3112_ID:
2659 	case SCH3114_ID:
2660 	case SCH3116_ID:
2661 		data->type = sch311x;
2662 		break;
2663 	case SCH5127_ID:
2664 		data->type = sch5127;
2665 		break;
2666 	default:
2667 		company = dme1737_read(data, DME1737_REG_COMPANY);
2668 		device = dme1737_read(data, DME1737_REG_DEVICE);
2669 
2670 		if ((company == DME1737_COMPANY_SMSC) &&
2671 		    (device == SCH311X_DEVICE)) {
2672 			data->type = sch311x;
2673 		} else if ((company == DME1737_COMPANY_SMSC) &&
2674 			   (device == SCH5127_DEVICE)) {
2675 			data->type = sch5127;
2676 		} else {
2677 			return -ENODEV;
2678 		}
2679 	}
2680 
2681 	if (data->type == sch5127)
2682 		data->name = "sch5127";
2683 	else
2684 		data->name = "sch311x";
2685 
2686 	/* Initialize the mutex */
2687 	mutex_init(&data->update_lock);
2688 
2689 	dev_info(dev, "Found a %s chip at 0x%04x\n",
2690 		 data->type == sch5127 ? "SCH5127" : "SCH311x", data->addr);
2691 
2692 	/* Initialize the chip */
2693 	err = dme1737_init_device(dev);
2694 	if (err) {
2695 		dev_err(dev, "Failed to initialize device.\n");
2696 		return err;
2697 	}
2698 
2699 	/* Create sysfs files */
2700 	err = dme1737_create_files(dev);
2701 	if (err) {
2702 		dev_err(dev, "Failed to create sysfs files.\n");
2703 		return err;
2704 	}
2705 
2706 	/* Register device */
2707 	data->hwmon_dev = hwmon_device_register(dev);
2708 	if (IS_ERR(data->hwmon_dev)) {
2709 		dev_err(dev, "Failed to register device.\n");
2710 		err = PTR_ERR(data->hwmon_dev);
2711 		goto exit_remove_files;
2712 	}
2713 
2714 	return 0;
2715 
2716 exit_remove_files:
2717 	dme1737_remove_files(dev);
2718 	return err;
2719 }
2720 
2721 static int __devexit dme1737_isa_remove(struct platform_device *pdev)
2722 {
2723 	struct dme1737_data *data = platform_get_drvdata(pdev);
2724 
2725 	hwmon_device_unregister(data->hwmon_dev);
2726 	dme1737_remove_files(&pdev->dev);
2727 
2728 	return 0;
2729 }
2730 
2731 static struct platform_driver dme1737_isa_driver = {
2732 	.driver = {
2733 		.owner = THIS_MODULE,
2734 		.name = "dme1737",
2735 	},
2736 	.probe = dme1737_isa_probe,
2737 	.remove = __devexit_p(dme1737_isa_remove),
2738 };
2739 
2740 /* ---------------------------------------------------------------------
2741  * Module initialization and cleanup
2742  * --------------------------------------------------------------------- */
2743 
2744 static int __init dme1737_init(void)
2745 {
2746 	int err;
2747 	unsigned short addr;
2748 
2749 	err = i2c_add_driver(&dme1737_i2c_driver);
2750 	if (err)
2751 		goto exit;
2752 
2753 	if (dme1737_isa_detect(0x2e, &addr) &&
2754 	    dme1737_isa_detect(0x4e, &addr) &&
2755 	    (!probe_all_addr ||
2756 	     (dme1737_isa_detect(0x162e, &addr) &&
2757 	      dme1737_isa_detect(0x164e, &addr)))) {
2758 		/* Return 0 if we didn't find an ISA device */
2759 		return 0;
2760 	}
2761 
2762 	err = platform_driver_register(&dme1737_isa_driver);
2763 	if (err)
2764 		goto exit_del_i2c_driver;
2765 
2766 	/* Sets global pdev as a side effect */
2767 	err = dme1737_isa_device_add(addr);
2768 	if (err)
2769 		goto exit_del_isa_driver;
2770 
2771 	return 0;
2772 
2773 exit_del_isa_driver:
2774 	platform_driver_unregister(&dme1737_isa_driver);
2775 exit_del_i2c_driver:
2776 	i2c_del_driver(&dme1737_i2c_driver);
2777 exit:
2778 	return err;
2779 }
2780 
2781 static void __exit dme1737_exit(void)
2782 {
2783 	if (pdev) {
2784 		platform_device_unregister(pdev);
2785 		platform_driver_unregister(&dme1737_isa_driver);
2786 	}
2787 
2788 	i2c_del_driver(&dme1737_i2c_driver);
2789 }
2790 
2791 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
2792 MODULE_DESCRIPTION("DME1737 sensors");
2793 MODULE_LICENSE("GPL");
2794 
2795 module_init(dme1737_init);
2796 module_exit(dme1737_exit);
2797