aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/hwmon/vt1211.c
blob: 73f77a9b8b188fb15840beea34d5f2f07a8d8a4f (plain) (tree)
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
































                                                                          
                         
                       









                                                                               



                                                              

































































                                                                            
                                 





































































                                                                               



                                                                           











                                                                   
                                                              
 

                               

 
                                                   
 

                                

 
                                                       
 

                                      

 
                                             
 

                            

 
                                            
 
                            




























































































































































































































































































































































































































































































































































































                                                                               
                                                                     














































































































































































































































































































































                                                                             





                                                                              





















































                                                                            


                                                     









                                                                      

                                                              








                                                                
                             
 
                                                 



                                         


                                                              





























                                                                            

                                                 
                                  
 





















                                                                            
                                                                   

                          
                  
 
                               
 

                                                                             


                          
                                                      
 
                                                                 




                                                                        

                                                                           







                                                                         

                                                        

     
                              







                                   

                                                          















































                                                                              
/*
 * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
 *            monitoring features
 * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
 *
 * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
 * and its port to kernel 2.6 by Lars Ekman.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <asm/io.h>

static int uch_config = -1;
module_param(uch_config, int, 0);
MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");

static int int_mode = -1;
module_param(int_mode, int, 0);
MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");

static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");

static struct platform_device *pdev;

#define DRVNAME "vt1211"

/* ---------------------------------------------------------------------
 * Registers
 *
 * The sensors are defined as follows.
 *
 * Sensor          Voltage Mode   Temp Mode   Notes (from the datasheet)
 * --------        ------------   ---------   --------------------------
 * Reading 1                      temp1       Intel thermal diode
 * Reading 3                      temp2       Internal thermal diode
 * UCH1/Reading2   in0            temp3       NTC type thermistor
 * UCH2            in1            temp4       +2.5V
 * UCH3            in2            temp5       VccP
 * UCH4            in3            temp6       +5V
 * UCH5            in4            temp7       +12V
 * 3.3V            in5                        Internal VDD (+3.3V)
 *
 * --------------------------------------------------------------------- */

/* Voltages (in) numbered 0-5 (ix) */
#define VT1211_REG_IN(ix)		(0x21 + (ix))
#define VT1211_REG_IN_MIN(ix)		((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
#define VT1211_REG_IN_MAX(ix)		((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))

/* Temperatures (temp) numbered 0-6 (ix) */
static u8 regtemp[]	= {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
static u8 regtempmax[]	= {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
static u8 regtemphyst[]	= {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};

/* Fans numbered 0-1 (ix) */
#define VT1211_REG_FAN(ix)		(0x29 + (ix))
#define VT1211_REG_FAN_MIN(ix)		(0x3b + (ix))
#define VT1211_REG_FAN_DIV		 0x47

/* PWMs numbered 0-1 (ix) */
/* Auto points numbered 0-3 (ap) */
#define VT1211_REG_PWM(ix)		(0x60 + (ix))
#define VT1211_REG_PWM_CLK		 0x50
#define VT1211_REG_PWM_CTL		 0x51
#define VT1211_REG_PWM_AUTO_TEMP(ap)	(0x55 - (ap))
#define VT1211_REG_PWM_AUTO_PWM(ix, ap)	(0x58 + 2 * (ix) - (ap))

/* Miscellaneous registers */
#define VT1211_REG_CONFIG		0x40
#define VT1211_REG_ALARM1		0x41
#define VT1211_REG_ALARM2		0x42
#define VT1211_REG_VID			0x45
#define VT1211_REG_UCH_CONFIG		0x4a
#define VT1211_REG_TEMP1_CONFIG		0x4b
#define VT1211_REG_TEMP2_CONFIG		0x4c

/* In, temp & fan alarm bits */
static const u8 bitalarmin[]	= {11, 0, 1, 3, 8, 2, 9};
static const u8 bitalarmtemp[]	= {4, 15, 11, 0, 1, 3, 8};
static const u8 bitalarmfan[]	= {6, 7};

/* ---------------------------------------------------------------------
 * Data structures and manipulation thereof
 * --------------------------------------------------------------------- */

struct vt1211_data {
	unsigned short addr;
	const char *name;
	struct device *hwmon_dev;

	struct mutex update_lock;
	char valid;			/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	/* Register values */
	u8  in[6];
	u8  in_max[6];
	u8  in_min[6];
	u8  temp[7];
	u8  temp_max[7];
	u8  temp_hyst[7];
	u8  fan[2];
	u8  fan_min[2];
	u8  fan_div[2];
	u8  fan_ctl;
	u8  pwm[2];
	u8  pwm_ctl[2];
	u8  pwm_clk;
	u8  pwm_auto_temp[4];
	u8  pwm_auto_pwm[2][4];
	u8  vid;		/* Read once at init time */
	u8  vrm;
	u8  uch_config;		/* Read once at init time */
	u16 alarms;
};

/* ix = [0-5] */
#define ISVOLT(ix, uch_config)	((ix) > 4 ? 1 : \
				 !(((uch_config) >> ((ix) + 2)) & 1))

/* ix = [0-6] */
#define ISTEMP(ix, uch_config)	((ix) < 2 ? 1 : \
				 ((uch_config) >> (ix)) & 1)

/* in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
   driver according to the VT1211 BIOS porting guide */
#define IN_FROM_REG(ix, reg)	((reg) < 3 ? 0 : (ix) == 5 ? \
				 (((reg) - 3) * 15882 + 479) / 958 : \
				 (((reg) - 3) * 10000 + 479) / 958)
#define IN_TO_REG(ix, val)	(SENSORS_LIMIT((ix) == 5 ? \
				 ((val) * 958 + 7941) / 15882 + 3 : \
				 ((val) * 958 + 5000) / 10000 + 3, 0, 255))

/* temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
   temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
   according to some measurements that I took on an EPIA M10000.
   temp3-7 are thermistor based so the driver returns the voltage measured at
   the pin (range 0V - 2.2V). */
#define TEMP_FROM_REG(ix, reg)	((ix) == 0 ? (reg) * 1000 : \
				 (ix) == 1 ? (reg) < 51 ? 0 : \
				 ((reg) - 51) * 1000 : \
				 ((253 - (reg)) * 2200 + 105) / 210)
#define TEMP_TO_REG(ix, val)	SENSORS_LIMIT( \
				 ((ix) == 0 ? ((val) + 500) / 1000 : \
				  (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
				  253 - ((val) * 210 + 1100) / 2200), 0, 255)

#define DIV_FROM_REG(reg)	(1 << (reg))

#define RPM_FROM_REG(reg, div)	(((reg) == 0) || ((reg) == 255) ? 0 : \
				 1310720 / (reg) / DIV_FROM_REG(div))
#define RPM_TO_REG(val, div)	((val) == 0 ? 255 : \
				 SENSORS_LIMIT((1310720 / (val) / \
				 DIV_FROM_REG(div)), 1, 254))

/* ---------------------------------------------------------------------
 * Super-I/O constants and functions
 * --------------------------------------------------------------------- */

/* Configuration index port registers
 * The vt1211 can live at 2 different addresses so we need to probe both */
#define SIO_REG_CIP1		0x2e
#define SIO_REG_CIP2		0x4e

/* Configuration registers */
#define SIO_VT1211_LDN		0x07	/* logical device number */
#define SIO_VT1211_DEVID	0x20	/* device ID */
#define SIO_VT1211_DEVREV	0x21	/* device revision */
#define SIO_VT1211_ACTIVE	0x30	/* HW monitor active */
#define SIO_VT1211_BADDR	0x60	/* base I/O address */
#define SIO_VT1211_ID		0x3c	/* VT1211 device ID */

/* VT1211 logical device numbers */
#define SIO_VT1211_LDN_HWMON	0x0b	/* HW monitor */

static inline void superio_outb(int sio_cip, int reg, int val)
{
	outb(reg, sio_cip);
	outb(val, sio_cip + 1);
}

static inline int superio_inb(int sio_cip, int reg)
{
	outb(reg, sio_cip);
	return inb(sio_cip + 1);
}

static inline void superio_select(int sio_cip, int ldn)
{
	outb(SIO_VT1211_LDN, sio_cip);
	outb(ldn, sio_cip + 1);
}

static inline void superio_enter(int sio_cip)
{
	outb(0x87, sio_cip);
	outb(0x87, sio_cip);
}

static inline void superio_exit(int sio_cip)
{
	outb(0xaa, sio_cip);
}

/* ---------------------------------------------------------------------
 * Device I/O access
 * --------------------------------------------------------------------- */

static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
{
	return inb(data->addr + reg);
}

static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
{
	outb(val, data->addr + reg);
}

static struct vt1211_data *vt1211_update_device(struct device *dev)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	int ix, val;

	mutex_lock(&data->update_lock);

	/* registers cache is refreshed after 1 second */
	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
		/* read VID */
		data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;

		/* voltage (in) registers */
		for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
			if (ISVOLT(ix, data->uch_config)) {
				data->in[ix] = vt1211_read8(data,
						VT1211_REG_IN(ix));
				data->in_min[ix] = vt1211_read8(data,
						VT1211_REG_IN_MIN(ix));
				data->in_max[ix] = vt1211_read8(data,
						VT1211_REG_IN_MAX(ix));
			}
		}

		/* temp registers */
		for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
			if (ISTEMP(ix, data->uch_config)) {
				data->temp[ix] = vt1211_read8(data,
						regtemp[ix]);
				data->temp_max[ix] = vt1211_read8(data,
						regtempmax[ix]);
				data->temp_hyst[ix] = vt1211_read8(data,
						regtemphyst[ix]);
			}
		}

		/* fan & pwm registers */
		for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
			data->fan[ix] = vt1211_read8(data,
						VT1211_REG_FAN(ix));
			data->fan_min[ix] = vt1211_read8(data,
						VT1211_REG_FAN_MIN(ix));
			data->pwm[ix] = vt1211_read8(data,
						VT1211_REG_PWM(ix));
		}
		val = vt1211_read8(data, VT1211_REG_FAN_DIV);
		data->fan_div[0] = (val >> 4) & 3;
		data->fan_div[1] = (val >> 6) & 3;
		data->fan_ctl = val & 0xf;

		val = vt1211_read8(data, VT1211_REG_PWM_CTL);
		data->pwm_ctl[0] = val & 0xf;
		data->pwm_ctl[1] = (val >> 4) & 0xf;

		data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);

		/* pwm & temp auto point registers */
		data->pwm_auto_pwm[0][1] = vt1211_read8(data,
						VT1211_REG_PWM_AUTO_PWM(0, 1));
		data->pwm_auto_pwm[0][2] = vt1211_read8(data,
						VT1211_REG_PWM_AUTO_PWM(0, 2));
		data->pwm_auto_pwm[1][1] = vt1211_read8(data,
						VT1211_REG_PWM_AUTO_PWM(1, 1));
		data->pwm_auto_pwm[1][2] = vt1211_read8(data,
						VT1211_REG_PWM_AUTO_PWM(1, 2));
		for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
			data->pwm_auto_temp[ix] = vt1211_read8(data,
						VT1211_REG_PWM_AUTO_TEMP(ix));
		}

		/* alarm registers */
		data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
				vt1211_read8(data, VT1211_REG_ALARM1);

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

/* ---------------------------------------------------------------------
 * Voltage sysfs interfaces
 * ix = [0-5]
 * --------------------------------------------------------------------- */

#define SHOW_IN_INPUT	0
#define SHOW_SET_IN_MIN	1
#define SHOW_SET_IN_MAX	2
#define SHOW_IN_ALARM	3

static ssize_t show_in(struct device *dev, struct device_attribute *attr,
		       char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	int res;

	switch (fn) {
	case SHOW_IN_INPUT:
		res = IN_FROM_REG(ix, data->in[ix]);
		break;
	case SHOW_SET_IN_MIN:
		res = IN_FROM_REG(ix, data->in_min[ix]);
		break;
	case SHOW_SET_IN_MAX:
		res = IN_FROM_REG(ix, data->in_max[ix]);
		break;
	case SHOW_IN_ALARM:
		res = (data->alarms >> bitalarmin[ix]) & 1;
		break;
	default:
		res = 0;
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

	return sprintf(buf, "%d\n", res);
}

static ssize_t set_in(struct device *dev, struct device_attribute *attr,
		      const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	switch (fn) {
	case SHOW_SET_IN_MIN:
		data->in_min[ix] = IN_TO_REG(ix, val);
		vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
		break;
	case SHOW_SET_IN_MAX:
		data->in_max[ix] = IN_TO_REG(ix, val);
		vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
		break;
	default:
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}
	mutex_unlock(&data->update_lock);

	return count;
}

/* ---------------------------------------------------------------------
 * Temperature sysfs interfaces
 * ix = [0-6]
 * --------------------------------------------------------------------- */

#define SHOW_TEMP_INPUT		0
#define SHOW_SET_TEMP_MAX	1
#define SHOW_SET_TEMP_MAX_HYST	2
#define SHOW_TEMP_ALARM		3

static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	int res;

	switch (fn) {
	case SHOW_TEMP_INPUT:
		res = TEMP_FROM_REG(ix, data->temp[ix]);
		break;
	case SHOW_SET_TEMP_MAX:
		res = TEMP_FROM_REG(ix, data->temp_max[ix]);
		break;
	case SHOW_SET_TEMP_MAX_HYST:
		res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
		break;
	case SHOW_TEMP_ALARM:
		res = (data->alarms >> bitalarmtemp[ix]) & 1;
		break;
	default:
		res = 0;
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

	return sprintf(buf, "%d\n", res);
}

static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
			const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	switch (fn) {
	case SHOW_SET_TEMP_MAX:
		data->temp_max[ix] = TEMP_TO_REG(ix, val);
		vt1211_write8(data, regtempmax[ix],
			      data->temp_max[ix]);
		break;
	case SHOW_SET_TEMP_MAX_HYST:
		data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
		vt1211_write8(data, regtemphyst[ix],
			      data->temp_hyst[ix]);
		break;
	default:
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}
	mutex_unlock(&data->update_lock);

	return count;
}

/* ---------------------------------------------------------------------
 * Fan sysfs interfaces
 * ix = [0-1]
 * --------------------------------------------------------------------- */

#define SHOW_FAN_INPUT		0
#define SHOW_SET_FAN_MIN	1
#define SHOW_SET_FAN_DIV	2
#define SHOW_FAN_ALARM		3

static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	int res;

	switch (fn) {
	case SHOW_FAN_INPUT:
		res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
		break;
	case SHOW_SET_FAN_MIN:
		res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
		break;
	case SHOW_SET_FAN_DIV:
		res = DIV_FROM_REG(data->fan_div[ix]);
		break;
	case SHOW_FAN_ALARM:
		res = (data->alarms >> bitalarmfan[ix]) & 1;
		break;
	default:
		res = 0;
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

	return sprintf(buf, "%d\n", res);
}

static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);
	int reg;

	mutex_lock(&data->update_lock);

	/* sync the data cache */
	reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
	data->fan_div[0] = (reg >> 4) & 3;
	data->fan_div[1] = (reg >> 6) & 3;
	data->fan_ctl = reg & 0xf;

	switch (fn) {
	case SHOW_SET_FAN_MIN:
		data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
		vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
			      data->fan_min[ix]);
		break;
	case SHOW_SET_FAN_DIV:
		switch (val) {
			case 1: data->fan_div[ix] = 0; break;
			case 2: data->fan_div[ix] = 1; break;
			case 4: data->fan_div[ix] = 2; break;
			case 8: data->fan_div[ix] = 3; break;
			default:
				count = -EINVAL;
				dev_warn(dev, "fan div value %ld not "
					 "supported. Choose one of 1, 2, "
					 "4, or 8.\n", val);
				goto EXIT;
		}
		vt1211_write8(data, VT1211_REG_FAN_DIV,
			      ((data->fan_div[1] << 6) |
			       (data->fan_div[0] << 4) |
				data->fan_ctl));
		break;
	default:
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

EXIT:
	mutex_unlock(&data->update_lock);
	return count;
}

/* ---------------------------------------------------------------------
 * PWM sysfs interfaces
 * ix = [0-1]
 * --------------------------------------------------------------------- */

#define SHOW_PWM			0
#define SHOW_SET_PWM_ENABLE		1
#define SHOW_SET_PWM_FREQ		2
#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP	3

static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	int res;

	switch (fn) {
	case SHOW_PWM:
		res = data->pwm[ix];
		break;
	case SHOW_SET_PWM_ENABLE:
		res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
		break;
	case SHOW_SET_PWM_FREQ:
		res = 90000 >> (data->pwm_clk & 7);
		break;
	case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
		res = (data->pwm_ctl[ix] & 7) + 1;
		break;
	default:
		res = 0;
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

	return sprintf(buf, "%d\n", res);
}

static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int fn = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);
	int tmp, reg;

	mutex_lock(&data->update_lock);

	switch (fn) {
	case SHOW_SET_PWM_ENABLE:
		/* sync the data cache */
		reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
		data->fan_div[0] = (reg >> 4) & 3;
		data->fan_div[1] = (reg >> 6) & 3;
		data->fan_ctl = reg & 0xf;
		reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
		data->pwm_ctl[0] = reg & 0xf;
		data->pwm_ctl[1] = (reg >> 4) & 0xf;
		switch (val) {
		case 0:
			data->pwm_ctl[ix] &= 7;
			/* disable SmartGuardian if both PWM outputs are
			 * disabled */
			if ((data->pwm_ctl[ix ^ 1] & 1) == 0) {
				data->fan_ctl &= 0xe;
			}
			break;
		case 2:
			data->pwm_ctl[ix] |= 8;
			data->fan_ctl |= 1;
			break;
		default:
			count = -EINVAL;
			dev_warn(dev, "pwm mode %ld not supported. "
				 "Choose one of 0 or 2.\n", val);
			goto EXIT;
		}
		vt1211_write8(data, VT1211_REG_PWM_CTL,
			      ((data->pwm_ctl[1] << 4) |
				data->pwm_ctl[0]));
		vt1211_write8(data, VT1211_REG_FAN_DIV,
			      ((data->fan_div[1] << 6) |
			       (data->fan_div[0] << 4) |
				data->fan_ctl));
		break;
	case SHOW_SET_PWM_FREQ:
		val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
		/* calculate tmp = log2(val) */
		tmp = 0;
		for (val >>= 1; val > 0; val >>= 1) {
			tmp++;
		}
		/* sync the data cache */
		reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
		data->pwm_clk = (reg & 0xf8) | tmp;
		vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
		break;
	case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
		if ((val < 1) || (val > 7)) {
			count = -EINVAL;
			dev_warn(dev, "temp channel %ld not supported. "
				 "Choose a value between 1 and 7.\n", val);
			goto EXIT;
		}
		if (!ISTEMP(val - 1, data->uch_config)) {
			count = -EINVAL;
			dev_warn(dev, "temp channel %ld is not available.\n",
				 val);
			goto EXIT;
		}
		/* sync the data cache */
		reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
		data->pwm_ctl[0] = reg & 0xf;
		data->pwm_ctl[1] = (reg >> 4) & 0xf;
		data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
		vt1211_write8(data, VT1211_REG_PWM_CTL,
			      ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
		break;
	default:
		dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
	}

EXIT:
	mutex_unlock(&data->update_lock);
	return count;
}

/* ---------------------------------------------------------------------
 * PWM auto point definitions
 * ix = [0-1]
 * ap = [0-3]
 * --------------------------------------------------------------------- */

/*
 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
 * Note that there is only a single set of temp auto points that controls both
 * PWM controllers. We still create 2 sets of sysfs files to make it look
 * more consistent even though they map to the same registers.
 *
 * ix ap : description
 * -------------------
 * 0  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 * 0  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 * 0  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 * 0  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 * 1  0  : pwm1/2 off temperature        (pwm_auto_temp[0])
 * 1  1  : pwm1/2 low speed temperature  (pwm_auto_temp[1])
 * 1  2  : pwm1/2 high speed temperature (pwm_auto_temp[2])
 * 1  3  : pwm1/2 full speed temperature (pwm_auto_temp[3])
 */

static ssize_t show_pwm_auto_point_temp(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int ap = sensor_attr_2->nr;

	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
		       data->pwm_auto_temp[ap]));
}

static ssize_t set_pwm_auto_point_temp(struct device *dev,
				       struct device_attribute *attr,
				       const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int ap = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);
	int reg;

	mutex_lock(&data->update_lock);

	/* sync the data cache */
	reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
	data->pwm_ctl[0] = reg & 0xf;
	data->pwm_ctl[1] = (reg >> 4) & 0xf;

	data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
	vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
		      data->pwm_auto_temp[ap]);
	mutex_unlock(&data->update_lock);

	return count;
}

/*
 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
 * be changed.
 *
 * ix ap : description
 * -------------------
 * 0  0  : pwm1 off                   (pwm_auto_pwm[0][0], hard-wired to 0)
 * 0  1  : pwm1 low speed duty cycle  (pwm_auto_pwm[0][1])
 * 0  2  : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
 * 0  3  : pwm1 full speed            (pwm_auto_pwm[0][3], hard-wired to 255)
 * 1  0  : pwm2 off                   (pwm_auto_pwm[1][0], hard-wired to 0)
 * 1  1  : pwm2 low speed duty cycle  (pwm_auto_pwm[1][1])
 * 1  2  : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
 * 1  3  : pwm2 full speed            (pwm_auto_pwm[1][3], hard-wired to 255)
*/

static ssize_t show_pwm_auto_point_pwm(struct device *dev,
				       struct device_attribute *attr,
				       char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int ap = sensor_attr_2->nr;

	return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
}

static ssize_t set_pwm_auto_point_pwm(struct device *dev,
				      struct device_attribute *attr,
				      const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	struct sensor_device_attribute_2 *sensor_attr_2 =
						to_sensor_dev_attr_2(attr);
	int ix = sensor_attr_2->index;
	int ap = sensor_attr_2->nr;
	long val = simple_strtol(buf, NULL, 10);

	if ((val < 0) || (val > 255)) {
		dev_err(dev, "pwm value %ld is out of range. "
			"Choose a value between 0 and 255.\n" , val);
		return -EINVAL;
	}

	mutex_lock(&data->update_lock);
	data->pwm_auto_pwm[ix][ap] = val;
	vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
		      data->pwm_auto_pwm[ix][ap]);
	mutex_unlock(&data->update_lock);

	return count;
}

/* ---------------------------------------------------------------------
 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
 * --------------------------------------------------------------------- */

static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct vt1211_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%d\n", data->vrm);
}

static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t count)
{
	struct vt1211_data *data = dev_get_drvdata(dev);
	long val = simple_strtol(buf, NULL, 10);

	data->vrm = val;

	return count;
}

static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	struct vt1211_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}

static ssize_t show_name(struct device *dev,
			 struct device_attribute *attr, char *buf)
{
	struct vt1211_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%s\n", data->name);
}

static ssize_t show_alarms(struct device *dev,
			   struct device_attribute *attr, char *buf)
{
	struct vt1211_data *data = vt1211_update_device(dev);

	return sprintf(buf, "%d\n", data->alarms);
}

/* ---------------------------------------------------------------------
 * Device attribute structs
 * --------------------------------------------------------------------- */

#define SENSOR_ATTR_IN_INPUT(ix) \
	SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
		show_in, NULL, SHOW_IN_INPUT, ix)

static struct sensor_device_attribute_2 vt1211_sysfs_in_input[] = {
	SENSOR_ATTR_IN_INPUT(0),
	SENSOR_ATTR_IN_INPUT(1),
	SENSOR_ATTR_IN_INPUT(2),
	SENSOR_ATTR_IN_INPUT(3),
	SENSOR_ATTR_IN_INPUT(4),
	SENSOR_ATTR_IN_INPUT(5),
};

#define SENSOR_ATTR_IN_MIN(ix) \
	SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
		show_in, set_in, SHOW_SET_IN_MIN, ix)

static struct sensor_device_attribute_2 vt1211_sysfs_in_min[] = {
	SENSOR_ATTR_IN_MIN(0),
	SENSOR_ATTR_IN_MIN(1),
	SENSOR_ATTR_IN_MIN(2),
	SENSOR_ATTR_IN_MIN(3),
	SENSOR_ATTR_IN_MIN(4),
	SENSOR_ATTR_IN_MIN(5),
};

#define SENSOR_ATTR_IN_MAX(ix) \
	SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
		show_in, set_in, SHOW_SET_IN_MAX, ix)

static struct sensor_device_attribute_2 vt1211_sysfs_in_max[] = {
	SENSOR_ATTR_IN_MAX(0),
	SENSOR_ATTR_IN_MAX(1),
	SENSOR_ATTR_IN_MAX(2),
	SENSOR_ATTR_IN_MAX(3),
	SENSOR_ATTR_IN_MAX(4),
	SENSOR_ATTR_IN_MAX(5),
};

#define SENSOR_ATTR_IN_ALARM(ix) \
	SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
		show_in, NULL, SHOW_IN_ALARM, ix)

static struct sensor_device_attribute_2 vt1211_sysfs_in_alarm[] = {
	SENSOR_ATTR_IN_ALARM(0),
	SENSOR_ATTR_IN_ALARM(1),
	SENSOR_ATTR_IN_ALARM(2),
	SENSOR_ATTR_IN_ALARM(3),
	SENSOR_ATTR_IN_ALARM(4),
	SENSOR_ATTR_IN_ALARM(5),
};

#define SENSOR_ATTR_TEMP_INPUT(ix) \
	SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
		show_temp, NULL, SHOW_TEMP_INPUT, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = {
	SENSOR_ATTR_TEMP_INPUT(1),
	SENSOR_ATTR_TEMP_INPUT(2),
	SENSOR_ATTR_TEMP_INPUT(3),
	SENSOR_ATTR_TEMP_INPUT(4),
	SENSOR_ATTR_TEMP_INPUT(5),
	SENSOR_ATTR_TEMP_INPUT(6),
	SENSOR_ATTR_TEMP_INPUT(7),
};

#define SENSOR_ATTR_TEMP_MAX(ix) \
	SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
		show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = {
	SENSOR_ATTR_TEMP_MAX(1),
	SENSOR_ATTR_TEMP_MAX(2),
	SENSOR_ATTR_TEMP_MAX(3),
	SENSOR_ATTR_TEMP_MAX(4),
	SENSOR_ATTR_TEMP_MAX(5),
	SENSOR_ATTR_TEMP_MAX(6),
	SENSOR_ATTR_TEMP_MAX(7),
};

#define SENSOR_ATTR_TEMP_MAX_HYST(ix) \
	SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
		show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = {
	SENSOR_ATTR_TEMP_MAX_HYST(1),
	SENSOR_ATTR_TEMP_MAX_HYST(2),
	SENSOR_ATTR_TEMP_MAX_HYST(3),
	SENSOR_ATTR_TEMP_MAX_HYST(4),
	SENSOR_ATTR_TEMP_MAX_HYST(5),
	SENSOR_ATTR_TEMP_MAX_HYST(6),
	SENSOR_ATTR_TEMP_MAX_HYST(7),
};

#define SENSOR_ATTR_TEMP_ALARM(ix) \
	SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
		show_temp, NULL, SHOW_TEMP_ALARM, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = {
	SENSOR_ATTR_TEMP_ALARM(1),
	SENSOR_ATTR_TEMP_ALARM(2),
	SENSOR_ATTR_TEMP_ALARM(3),
	SENSOR_ATTR_TEMP_ALARM(4),
	SENSOR_ATTR_TEMP_ALARM(5),
	SENSOR_ATTR_TEMP_ALARM(6),
	SENSOR_ATTR_TEMP_ALARM(7),
};

#define SENSOR_ATTR_FAN(ix) \
	SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
		show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
	SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
		show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
	SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
		show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
	SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
		show_fan, NULL, SHOW_FAN_ALARM, ix-1)

#define SENSOR_ATTR_PWM(ix) \
	SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
		show_pwm, NULL, SHOW_PWM, ix-1), \
	SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
	SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)

#define SENSOR_ATTR_PWM_FREQ(ix) \
	SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)

#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
	SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
		show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
		show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
		show_pwm_auto_point_temp, NULL, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
		show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
		show_pwm_auto_point_pwm, NULL, \
		ap-1, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
	SENSOR_ATTR_FAN(1),
	SENSOR_ATTR_FAN(2),
	SENSOR_ATTR_PWM(1),
	SENSOR_ATTR_PWM(2),
	SENSOR_ATTR_PWM_FREQ(1),
	SENSOR_ATTR_PWM_FREQ_RO(2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
};

static struct device_attribute vt1211_sysfs_misc[] = {
	__ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
	__ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
	__ATTR(name, S_IRUGO, show_name, NULL),
	__ATTR(alarms, S_IRUGO, show_alarms, NULL),
};

/* ---------------------------------------------------------------------
 * Device registration and initialization
 * --------------------------------------------------------------------- */

static void __devinit vt1211_init_device(struct vt1211_data *data)
{
	/* set VRM */
	data->vrm = vid_which_vrm();

	/* Read (and initialize) UCH config */
	data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
	if (uch_config > -1) {
		data->uch_config = (data->uch_config & 0x83) |
				   (uch_config << 2);
		vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
	}

	/* Initialize the interrupt mode (if request at module load time).
	 * The VT1211 implements 3 different modes for clearing interrupts:
	 * 0: Clear INT when status register is read. Regenerate INT as long
	 *    as temp stays above hysteresis limit.
	 * 1: Clear INT when status register is read. DON'T regenerate INT
	 *    until temp falls below hysteresis limit and exceeds hot limit
	 *    again.
	 * 2: Clear INT when temp falls below max limit.
	 *
	 * The driver only allows to force mode 0 since that's the only one
	 * that makes sense for 'sensors' */
	if (int_mode == 0) {
		vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
		vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
	}

	/* Fill in some hard wired values into our data struct */
	data->pwm_auto_pwm[0][3] = 255;
	data->pwm_auto_pwm[1][3] = 255;
}

static void vt1211_remove_sysfs(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	int i;

	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_in_input[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_min[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_max[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_alarm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_temp_input[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_max[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_max_hyst[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_alarm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_fan_pwm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
		device_remove_file(dev, &vt1211_sysfs_misc[i]);
	}
}

static int __devinit vt1211_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vt1211_data *data;
	struct resource *res;
	int i, err;

	if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) {
		err = -ENOMEM;
		dev_err(dev, "Out of memory\n");
		goto EXIT;
	}

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
		err = -EBUSY;
		dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
			(unsigned long)res->start, (unsigned long)res->end);
		goto EXIT_KFREE;
	}
	data->addr = res->start;
	data->name = DRVNAME;
	mutex_init(&data->update_lock);

	platform_set_drvdata(pdev, data);

	/* Initialize the VT1211 chip */
	vt1211_init_device(data);

	/* Create sysfs interface files */
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
		if (ISVOLT(i, data->uch_config)) {
			if ((err = device_create_file(dev,
				&vt1211_sysfs_in_input[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_min[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_max[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_alarm[i].dev_attr))) {
				goto EXIT_DEV_REMOVE;
			}
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
		if (ISTEMP(i, data->uch_config)) {
			if ((err = device_create_file(dev,
				&vt1211_sysfs_temp_input[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_max[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_max_hyst[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_alarm[i].dev_attr))) {
				goto EXIT_DEV_REMOVE;
			}
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
		err = device_create_file(dev,
			&vt1211_sysfs_fan_pwm[i].dev_attr);
		if (err) {
			goto EXIT_DEV_REMOVE;
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
		err = device_create_file(dev,
		       &vt1211_sysfs_misc[i]);
		if (err) {
			goto EXIT_DEV_REMOVE;
		}
	}

	/* Register device */
	data->hwmon_dev = hwmon_device_register(dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		dev_err(dev, "Class registration failed (%d)\n", err);
		goto EXIT_DEV_REMOVE_SILENT;
	}

	return 0;

EXIT_DEV_REMOVE:
	dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
EXIT_DEV_REMOVE_SILENT:
	vt1211_remove_sysfs(pdev);
	release_region(res->start, res->end - res->start + 1);
EXIT_KFREE:
	platform_set_drvdata(pdev, NULL);
	kfree(data);
EXIT:
	return err;
}

static int __devexit vt1211_remove(struct platform_device *pdev)
{
	struct vt1211_data *data = platform_get_drvdata(pdev);
	struct resource *res;

	hwmon_device_unregister(data->hwmon_dev);
	vt1211_remove_sysfs(pdev);
	platform_set_drvdata(pdev, NULL);
	kfree(data);

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	release_region(res->start, res->end - res->start + 1);

	return 0;
}

static struct platform_driver vt1211_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name  = DRVNAME,
	},
	.probe  = vt1211_probe,
	.remove = __devexit_p(vt1211_remove),
};

static int __init vt1211_device_add(unsigned short address)
{
	struct resource res = {
		.start	= address,
		.end	= address + 0x7f,
		.flags	= IORESOURCE_IO,
	};
	int err;

	pdev = platform_device_alloc(DRVNAME, address);
	if (!pdev) {
		err = -ENOMEM;
		printk(KERN_ERR DRVNAME ": Device allocation failed (%d)\n",
		       err);
		goto EXIT;
	}

	res.name = pdev->name;
	err = acpi_check_resource_conflict(&res);
	if (err)
		goto EXIT_DEV_PUT;

	err = platform_device_add_resources(pdev, &res, 1);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device resource addition failed "
		       "(%d)\n", err);
		goto EXIT_DEV_PUT;
	}

	err = platform_device_add(pdev);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
		       err);
		goto EXIT_DEV_PUT;
	}

	return 0;

EXIT_DEV_PUT:
	platform_device_put(pdev);
EXIT:
	return err;
}

static int __init vt1211_find(int sio_cip, unsigned short *address)
{
	int err = -ENODEV;
	int devid;

	superio_enter(sio_cip);

	devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
	if (devid != SIO_VT1211_ID) {
		goto EXIT;
	}

	superio_select(sio_cip, SIO_VT1211_LDN_HWMON);

	if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
		printk(KERN_WARNING DRVNAME ": HW monitor is disabled, "
		       "skipping\n");
		goto EXIT;
	}

	*address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
		    (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
	if (*address == 0) {
		printk(KERN_WARNING DRVNAME ": Base address is not set, "
		       "skipping\n");
		goto EXIT;
	}

	err = 0;
	printk(KERN_INFO DRVNAME ": Found VT1211 chip at 0x%04x, "
	       "revision %u\n", *address,
	       superio_inb(sio_cip, SIO_VT1211_DEVREV));

EXIT:
	superio_exit(sio_cip);
	return err;
}

static int __init vt1211_init(void)
{
	int err;
	unsigned short address = 0;

	if ((err = vt1211_find(SIO_REG_CIP1, &address)) &&
	    (err = vt1211_find(SIO_REG_CIP2, &address))) {
		goto EXIT;
	}

	if ((uch_config < -1) || (uch_config > 31)) {
		err = -EINVAL;
		printk(KERN_WARNING DRVNAME ": Invalid UCH configuration %d. "
		       "Choose a value between 0 and 31.\n", uch_config);
	  goto EXIT;
	}

	if ((int_mode < -1) || (int_mode > 0)) {
		err = -EINVAL;
		printk(KERN_WARNING DRVNAME ": Invalid interrupt mode %d. "
		       "Only mode 0 is supported.\n", int_mode);
	  goto EXIT;
	}

	err = platform_driver_register(&vt1211_driver);
	if (err) {
		goto EXIT;
	}

	/* Sets global pdev as a side effect */
	err = vt1211_device_add(address);
	if (err) {
		goto EXIT_DRV_UNREGISTER;
	}

	return 0;

EXIT_DRV_UNREGISTER:
	platform_driver_unregister(&vt1211_driver);
EXIT:
	return err;
}

static void __exit vt1211_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&vt1211_driver);
}

MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
MODULE_DESCRIPTION("VT1211 sensors");
MODULE_LICENSE("GPL");

module_init(vt1211_init);
module_exit(vt1211_exit);