Free Electrons

Embedded Linux Experts

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 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
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
/*-*-linux-c-*-*/

/*
  Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>

  based on MSI driver

  Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

  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., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.
 */

/*
 * compal-laptop.c - Compal laptop support.
 *
 * This driver exports a few files in /sys/devices/platform/compal-laptop/:
 *   wake_up_XXX   Whether or not we listen to such wake up events (rw)
 *
 * In addition to these platform device attributes the driver
 * registers itself in the Linux backlight control, power_supply, rfkill
 * and hwmon subsystem and is available to userspace under:
 *
 *   /sys/class/backlight/compal-laptop/
 *   /sys/class/power_supply/compal-laptop/
 *   /sys/class/rfkill/rfkillX/
 *   /sys/class/hwmon/hwmonX/
 *
 * Notes on the power_supply battery interface:
 *   - the "minimum" design voltage is *the* design voltage
 *   - the ambient temperature is the average battery temperature
 *     and the value is an educated guess (see commented code below)
 *
 *
 * This driver might work on other laptops produced by Compal. If you
 * want to try it you can pass force=1 as argument to the module which
 * will force it to load even when the DMI data doesn't identify the
 * laptop as compatible.
 *
 * Lots of data available at:
 * http://service1.marasst.com/Compal/JHL90_91/Service%20Manual/
 * JHL90%20service%20manual-Final-0725.pdf
 *
 *
 *
 * Support for the Compal JHL90 added by Roald Frederickx
 * (roald.frederickx@gmail.com):
 * Driver got large revision. Added functionalities: backlight
 * power, wake_on_XXX, a hwmon and power_supply interface.
 *
 * In case this gets merged into the kernel source: I want to dedicate this
 * to Kasper Meerts, the awesome guy who showed me Linux and C!
 */

/* NOTE: currently the wake_on_XXX, hwmon and power_supply interfaces are
 * only enabled on a JHL90 board until it is verified that they work on the
 * other boards too.  See the extra_features variable. */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/power_supply.h>
#include <linux/fb.h>
#include <acpi/video.h>

/* ======= */
/* Defines */
/* ======= */
#define DRIVER_NAME "compal-laptop"
#define DRIVER_VERSION	"0.2.7"

#define BACKLIGHT_LEVEL_ADDR		0xB9
#define BACKLIGHT_LEVEL_MAX		7
#define BACKLIGHT_STATE_ADDR		0x59
#define BACKLIGHT_STATE_ON_DATA		0xE1
#define BACKLIGHT_STATE_OFF_DATA	0xE2

#define WAKE_UP_ADDR			0xA4
#define WAKE_UP_PME			(1 << 0)
#define WAKE_UP_MODEM			(1 << 1)
#define WAKE_UP_LAN			(1 << 2)
#define WAKE_UP_WLAN			(1 << 4)
#define WAKE_UP_KEY			(1 << 6)
#define WAKE_UP_MOUSE			(1 << 7)

#define WIRELESS_ADDR			0xBB
#define WIRELESS_WLAN			(1 << 0)
#define WIRELESS_BT			(1 << 1)
#define WIRELESS_WLAN_EXISTS		(1 << 2)
#define WIRELESS_BT_EXISTS		(1 << 3)
#define WIRELESS_KILLSWITCH		(1 << 4)

#define PWM_ADDRESS			0x46
#define PWM_DISABLE_ADDR		0x59
#define PWM_DISABLE_DATA		0xA5
#define PWM_ENABLE_ADDR			0x59
#define PWM_ENABLE_DATA			0xA8

#define FAN_ADDRESS			0x46
#define FAN_DATA			0x81
#define FAN_FULL_ON_CMD			0x59 /* Doesn't seem to work. Just */
#define FAN_FULL_ON_ENABLE		0x76 /* force the pwm signal to its */
#define FAN_FULL_ON_DISABLE		0x77 /* maximum value instead */

#define TEMP_CPU			0xB0
#define TEMP_CPU_LOCAL			0xB1
#define TEMP_CPU_DTS			0xB5
#define TEMP_NORTHBRIDGE		0xB6
#define TEMP_VGA			0xB4
#define TEMP_SKIN			0xB2

#define BAT_MANUFACTURER_NAME_ADDR	0x10
#define BAT_MANUFACTURER_NAME_LEN	9
#define BAT_MODEL_NAME_ADDR		0x19
#define BAT_MODEL_NAME_LEN		6
#define BAT_SERIAL_NUMBER_ADDR		0xC4
#define BAT_SERIAL_NUMBER_LEN		5
#define BAT_CHARGE_NOW			0xC2
#define BAT_CHARGE_DESIGN		0xCA
#define BAT_VOLTAGE_NOW			0xC6
#define BAT_VOLTAGE_DESIGN		0xC8
#define BAT_CURRENT_NOW			0xD0
#define BAT_CURRENT_AVG			0xD2
#define BAT_POWER			0xD4
#define BAT_CAPACITY			0xCE
#define BAT_TEMP			0xD6
#define BAT_TEMP_AVG			0xD7
#define BAT_STATUS0			0xC1
#define BAT_STATUS1			0xF0
#define BAT_STATUS2			0xF1
#define BAT_STOP_CHARGE1		0xF2
#define BAT_STOP_CHARGE2		0xF3
#define BAT_CHARGE_LIMIT		0x03
#define BAT_CHARGE_LIMIT_MAX		100

#define BAT_S0_DISCHARGE		(1 << 0)
#define BAT_S0_DISCHRG_CRITICAL		(1 << 2)
#define BAT_S0_LOW			(1 << 3)
#define BAT_S0_CHARGING			(1 << 1)
#define BAT_S0_AC			(1 << 7)
#define BAT_S1_EXISTS			(1 << 0)
#define BAT_S1_FULL			(1 << 1)
#define BAT_S1_EMPTY			(1 << 2)
#define BAT_S1_LiION_OR_NiMH		(1 << 7)
#define BAT_S2_LOW_LOW			(1 << 0)
#define BAT_STOP_CHRG1_BAD_CELL		(1 << 1)
#define BAT_STOP_CHRG1_COMM_FAIL	(1 << 2)
#define BAT_STOP_CHRG1_OVERVOLTAGE	(1 << 6)
#define BAT_STOP_CHRG1_OVERTEMPERATURE	(1 << 7)


/* ======= */
/* Structs */
/* ======= */
struct compal_data{
	/* Fan control */
	int pwm_enable; /* 0:full on, 1:set by pwm1, 2:control by motherboard */
	unsigned char curr_pwm;

	/* Power supply */
	struct power_supply *psy;
	struct power_supply_info psy_info;
	char bat_model_name[BAT_MODEL_NAME_LEN + 1];
	char bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN + 1];
	char bat_serial_number[BAT_SERIAL_NUMBER_LEN + 1];
};


/* =============== */
/* General globals */
/* =============== */
static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");

/* Support for the wake_on_XXX, hwmon and power_supply interface. Currently
 * only gets enabled on a JHL90 board. Might work with the others too */
static bool extra_features;

/* Nasty stuff. For some reason the fan control is very un-linear.  I've
 * come up with these values by looping through the possible inputs and
 * watching the output of address 0x4F (do an ec_transaction writing 0x33
 * into 0x4F and read a few bytes from the output, like so:
 *	u8 writeData = 0x33;
 *	ec_transaction(0x4F, &writeData, 1, buffer, 32);
 * That address is labeled "fan1 table information" in the service manual.
 * It should be clear which value in 'buffer' changes). This seems to be
 * related to fan speed. It isn't a proper 'realtime' fan speed value
 * though, because physically stopping or speeding up the fan doesn't
 * change it. It might be the average voltage or current of the pwm output.
 * Nevertheless, it is more fine-grained than the actual RPM reading */
static const unsigned char pwm_lookup_table[256] = {
	0, 0, 0, 1, 1, 1, 2, 253, 254, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6,
	7, 7, 7, 8, 86, 86, 9, 9, 9, 10, 10, 10, 11, 92, 92, 12, 12, 95,
	13, 66, 66, 14, 14, 98, 15, 15, 15, 16, 16, 67, 17, 17, 72, 18, 70,
	75, 19, 90, 90, 73, 73, 73, 21, 21, 91, 91, 91, 96, 23, 94, 94, 94,
	94, 94, 94, 94, 94, 94, 94, 141, 141, 238, 223, 192, 139, 139, 139,
	139, 139, 142, 142, 142, 142, 142, 78, 78, 78, 78, 78, 76, 76, 76,
	76, 76, 79, 79, 79, 79, 79, 79, 79, 20, 20, 20, 20, 20, 22, 22, 22,
	22, 22, 24, 24, 24, 24, 24, 24, 219, 219, 219, 219, 219, 219, 219,
	219, 27, 27, 188, 188, 28, 28, 28, 29, 186, 186, 186, 186, 186,
	186, 186, 186, 186, 186, 31, 31, 31, 31, 31, 32, 32, 32, 41, 33,
	33, 33, 33, 33, 252, 252, 34, 34, 34, 43, 35, 35, 35, 36, 36, 38,
	206, 206, 206, 206, 206, 206, 206, 206, 206, 37, 37, 37, 46, 46,
	47, 47, 232, 232, 232, 232, 232, 232, 232, 232, 232, 232, 48, 48,
	48, 48, 48, 40, 40, 40, 49, 42, 42, 42, 42, 42, 42, 42, 42, 44,
	189, 189, 189, 189, 54, 54, 45, 45, 45, 45, 45, 45, 45, 45, 251,
	191, 199, 199, 199, 199, 199, 215, 215, 215, 215, 187, 187, 187,
	187, 187, 193, 50
};




/* ========================= */
/* Hardware access functions */
/* ========================= */
/* General access */
static u8 ec_read_u8(u8 addr)
{
	u8 value;
	ec_read(addr, &value);
	return value;
}

static s8 ec_read_s8(u8 addr)
{
	return (s8)ec_read_u8(addr);
}

static u16 ec_read_u16(u8 addr)
{
	int hi, lo;
	lo = ec_read_u8(addr);
	hi = ec_read_u8(addr + 1);
	return (hi << 8) + lo;
}

static s16 ec_read_s16(u8 addr)
{
	return (s16) ec_read_u16(addr);
}

static void ec_read_sequence(u8 addr, u8 *buf, int len)
{
	int i;
	for (i = 0; i < len; i++)
		ec_read(addr + i, buf + i);
}


/* Backlight access */
static int set_backlight_level(int level)
{
	if (level < 0 || level > BACKLIGHT_LEVEL_MAX)
		return -EINVAL;

	ec_write(BACKLIGHT_LEVEL_ADDR, level);

	return 0;
}

static int get_backlight_level(void)
{
	return (int) ec_read_u8(BACKLIGHT_LEVEL_ADDR);
}

static void set_backlight_state(bool on)
{
	u8 data = on ? BACKLIGHT_STATE_ON_DATA : BACKLIGHT_STATE_OFF_DATA;
	ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0);
}


/* Fan control access */
static void pwm_enable_control(void)
{
	unsigned char writeData = PWM_ENABLE_DATA;
	ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0);
}

static void pwm_disable_control(void)
{
	unsigned char writeData = PWM_DISABLE_DATA;
	ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0);
}

static void set_pwm(int pwm)
{
	ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0);
}

static int get_fan_rpm(void)
{
	u8 value, data = FAN_DATA;
	ec_transaction(FAN_ADDRESS, &data, 1, &value, 1);
	return 100 * (int)value;
}




/* =================== */
/* Interface functions */
/* =================== */

/* Backlight interface */
static int bl_get_brightness(struct backlight_device *b)
{
	return get_backlight_level();
}

static int bl_update_status(struct backlight_device *b)
{
	int ret = set_backlight_level(b->props.brightness);
	if (ret)
		return ret;

	set_backlight_state((b->props.power == FB_BLANK_UNBLANK)
		&&    !(b->props.state & BL_CORE_SUSPENDED)
		&&    !(b->props.state & BL_CORE_FBBLANK));
	return 0;
}

static const struct backlight_ops compalbl_ops = {
	.get_brightness = bl_get_brightness,
	.update_status	= bl_update_status,
};


/* Wireless interface */
static int compal_rfkill_set(void *data, bool blocked)
{
	unsigned long radio = (unsigned long) data;
	u8 result = ec_read_u8(WIRELESS_ADDR);
	u8 value;

	if (!blocked)
		value = (u8) (result | radio);
	else
		value = (u8) (result & ~radio);
	ec_write(WIRELESS_ADDR, value);

	return 0;
}

static void compal_rfkill_poll(struct rfkill *rfkill, void *data)
{
	u8 result = ec_read_u8(WIRELESS_ADDR);
	bool hw_blocked = !(result & WIRELESS_KILLSWITCH);
	rfkill_set_hw_state(rfkill, hw_blocked);
}

static const struct rfkill_ops compal_rfkill_ops = {
	.poll = compal_rfkill_poll,
	.set_block = compal_rfkill_set,
};


/* Wake_up interface */
#define SIMPLE_MASKED_STORE_SHOW(NAME, ADDR, MASK)			\
static ssize_t NAME##_show(struct device *dev,				\
	struct device_attribute *attr, char *buf)			\
{									\
	return sprintf(buf, "%d\n", ((ec_read_u8(ADDR) & MASK) != 0));	\
}									\
static ssize_t NAME##_store(struct device *dev,				\
	struct device_attribute *attr, const char *buf, size_t count)	\
{									\
	int state;							\
	u8 old_val = ec_read_u8(ADDR);					\
	if (sscanf(buf, "%d", &state) != 1 || (state < 0 || state > 1))	\
		return -EINVAL;						\
	ec_write(ADDR, state ? (old_val | MASK) : (old_val & ~MASK));	\
	return count;							\
}

SIMPLE_MASKED_STORE_SHOW(wake_up_pme,	WAKE_UP_ADDR, WAKE_UP_PME)
SIMPLE_MASKED_STORE_SHOW(wake_up_modem,	WAKE_UP_ADDR, WAKE_UP_MODEM)
SIMPLE_MASKED_STORE_SHOW(wake_up_lan,	WAKE_UP_ADDR, WAKE_UP_LAN)
SIMPLE_MASKED_STORE_SHOW(wake_up_wlan,	WAKE_UP_ADDR, WAKE_UP_WLAN)
SIMPLE_MASKED_STORE_SHOW(wake_up_key,	WAKE_UP_ADDR, WAKE_UP_KEY)
SIMPLE_MASKED_STORE_SHOW(wake_up_mouse,	WAKE_UP_ADDR, WAKE_UP_MOUSE)

/* Fan control interface */
static ssize_t pwm_enable_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct compal_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", data->pwm_enable);
}

static ssize_t pwm_enable_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct compal_data *data = dev_get_drvdata(dev);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;
	if (val < 0)
		return -EINVAL;

	data->pwm_enable = val;

	switch (val) {
	case 0:  /* Full speed */
		pwm_enable_control();
		set_pwm(255);
		break;
	case 1:  /* As set by pwm1 */
		pwm_enable_control();
		set_pwm(data->curr_pwm);
		break;
	default: /* Control by motherboard */
		pwm_disable_control();
		break;
	}

	return count;
}

static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct compal_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%hhu\n", data->curr_pwm);
}

static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct compal_data *data = dev_get_drvdata(dev);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;
	if (val < 0 || val > 255)
		return -EINVAL;

	data->curr_pwm = val;

	if (data->pwm_enable != 1)
		return count;
	set_pwm(val);

	return count;
}

static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	return sprintf(buf, "%d\n", get_fan_rpm());
}


/* Temperature interface */
#define TEMPERATURE_SHOW_TEMP_AND_LABEL(POSTFIX, ADDRESS, LABEL)	\
static ssize_t temp_##POSTFIX(struct device *dev,			\
		struct device_attribute *attr, char *buf)		\
{									\
	return sprintf(buf, "%d\n", 1000 * (int)ec_read_s8(ADDRESS));	\
}									\
static ssize_t label_##POSTFIX(struct device *dev,			\
		struct device_attribute *attr, char *buf)		\
{									\
	return sprintf(buf, "%s\n", LABEL);				\
}

/* Labels as in service guide */
TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu,        TEMP_CPU,        "CPU_TEMP");
TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_local,  TEMP_CPU_LOCAL,  "CPU_TEMP_LOCAL");
TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_DTS,    TEMP_CPU_DTS,    "CPU_DTS");
TEMPERATURE_SHOW_TEMP_AND_LABEL(northbridge,TEMP_NORTHBRIDGE,"NorthBridge");
TEMPERATURE_SHOW_TEMP_AND_LABEL(vga,        TEMP_VGA,        "VGA_TEMP");
TEMPERATURE_SHOW_TEMP_AND_LABEL(SKIN,       TEMP_SKIN,       "SKIN_TEMP90");


/* Power supply interface */
static int bat_status(void)
{
	u8 status0 = ec_read_u8(BAT_STATUS0);
	u8 status1 = ec_read_u8(BAT_STATUS1);

	if (status0 & BAT_S0_CHARGING)
		return POWER_SUPPLY_STATUS_CHARGING;
	if (status0 & BAT_S0_DISCHARGE)
		return POWER_SUPPLY_STATUS_DISCHARGING;
	if (status1 & BAT_S1_FULL)
		return POWER_SUPPLY_STATUS_FULL;
	return POWER_SUPPLY_STATUS_NOT_CHARGING;
}

static int bat_health(void)
{
	u8 status = ec_read_u8(BAT_STOP_CHARGE1);

	if (status & BAT_STOP_CHRG1_OVERTEMPERATURE)
		return POWER_SUPPLY_HEALTH_OVERHEAT;
	if (status & BAT_STOP_CHRG1_OVERVOLTAGE)
		return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
	if (status & BAT_STOP_CHRG1_BAD_CELL)
		return POWER_SUPPLY_HEALTH_DEAD;
	if (status & BAT_STOP_CHRG1_COMM_FAIL)
		return POWER_SUPPLY_HEALTH_UNKNOWN;
	return POWER_SUPPLY_HEALTH_GOOD;
}

static int bat_is_present(void)
{
	u8 status = ec_read_u8(BAT_STATUS2);
	return ((status & BAT_S1_EXISTS) != 0);
}

static int bat_technology(void)
{
	u8 status = ec_read_u8(BAT_STATUS1);

	if (status & BAT_S1_LiION_OR_NiMH)
		return POWER_SUPPLY_TECHNOLOGY_LION;
	return POWER_SUPPLY_TECHNOLOGY_NiMH;
}

static int bat_capacity_level(void)
{
	u8 status0 = ec_read_u8(BAT_STATUS0);
	u8 status1 = ec_read_u8(BAT_STATUS1);
	u8 status2 = ec_read_u8(BAT_STATUS2);

	if (status0 & BAT_S0_DISCHRG_CRITICAL
			|| status1 & BAT_S1_EMPTY
			|| status2 & BAT_S2_LOW_LOW)
		return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
	if (status0 & BAT_S0_LOW)
		return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
	if (status1 & BAT_S1_FULL)
		return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
	return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
}

static int bat_get_property(struct power_supply *psy,
				enum power_supply_property psp,
				union power_supply_propval *val)
{
	struct compal_data *data = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = bat_status();
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		val->intval = bat_health();
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = bat_is_present();
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = bat_technology();
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: /* THE design voltage... */
		val->intval = ec_read_u16(BAT_VOLTAGE_DESIGN) * 1000;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = ec_read_u16(BAT_VOLTAGE_NOW) * 1000;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		val->intval = ec_read_s16(BAT_CURRENT_NOW) * 1000;
		break;
	case POWER_SUPPLY_PROP_CURRENT_AVG:
		val->intval = ec_read_s16(BAT_CURRENT_AVG) * 1000;
		break;
	case POWER_SUPPLY_PROP_POWER_NOW:
		val->intval = ec_read_u8(BAT_POWER) * 1000000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		val->intval = ec_read_u16(BAT_CHARGE_DESIGN) * 1000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		val->intval = ec_read_u16(BAT_CHARGE_NOW) * 1000;
		break;
	case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
		val->intval = ec_read_u8(BAT_CHARGE_LIMIT);
		break;
	case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
		val->intval = BAT_CHARGE_LIMIT_MAX;
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		val->intval = ec_read_u8(BAT_CAPACITY);
		break;
	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
		val->intval = bat_capacity_level();
		break;
	/* It smees that BAT_TEMP_AVG is a (2's complement?) value showing
	 * the number of degrees, whereas BAT_TEMP is somewhat more
	 * complicated. It looks like this is a negative nember with a
	 * 100/256 divider and an offset of 222. Both were determined
	 * experimentally by comparing BAT_TEMP and BAT_TEMP_AVG. */
	case POWER_SUPPLY_PROP_TEMP:
		val->intval = ((222 - (int)ec_read_u8(BAT_TEMP)) * 1000) >> 8;
		break;
	case POWER_SUPPLY_PROP_TEMP_AMBIENT: /* Ambient, Avg, ... same thing */
		val->intval = ec_read_s8(BAT_TEMP_AVG) * 10;
		break;
	/* Neither the model name nor manufacturer name work for me. */
	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = data->bat_model_name;
		break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = data->bat_manufacturer_name;
		break;
	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
		val->strval = data->bat_serial_number;
		break;
	default:
		break;
	}
	return 0;
}

static int bat_set_property(struct power_supply *psy,
				enum power_supply_property psp,
				const union power_supply_propval *val)
{
	int level;

	switch (psp) {
	case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
		level = val->intval;
		if (level < 0 || level > BAT_CHARGE_LIMIT_MAX)
			return -EINVAL;
		if (ec_write(BAT_CHARGE_LIMIT, level) < 0)
			return -EIO;
		break;
	default:
		break;
	}
	return 0;
}

static int bat_writeable_property(struct power_supply *psy,
				enum power_supply_property psp)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
		return 1;
	default:
		return 0;
	}
}




/* ============== */
/* Driver Globals */
/* ============== */
static DEVICE_ATTR(wake_up_pme,
		0644, wake_up_pme_show,		wake_up_pme_store);
static DEVICE_ATTR(wake_up_modem,
		0644, wake_up_modem_show,	wake_up_modem_store);
static DEVICE_ATTR(wake_up_lan,
		0644, wake_up_lan_show,	wake_up_lan_store);
static DEVICE_ATTR(wake_up_wlan,
		0644, wake_up_wlan_show,	wake_up_wlan_store);
static DEVICE_ATTR(wake_up_key,
		0644, wake_up_key_show,	wake_up_key_store);
static DEVICE_ATTR(wake_up_mouse,
		0644, wake_up_mouse_show,	wake_up_mouse_store);

static DEVICE_ATTR(fan1_input,  S_IRUGO, fan_show,          NULL);
static DEVICE_ATTR(temp1_input, S_IRUGO, temp_cpu,          NULL);
static DEVICE_ATTR(temp2_input, S_IRUGO, temp_cpu_local,    NULL);
static DEVICE_ATTR(temp3_input, S_IRUGO, temp_cpu_DTS,      NULL);
static DEVICE_ATTR(temp4_input, S_IRUGO, temp_northbridge,  NULL);
static DEVICE_ATTR(temp5_input, S_IRUGO, temp_vga,          NULL);
static DEVICE_ATTR(temp6_input, S_IRUGO, temp_SKIN,         NULL);
static DEVICE_ATTR(temp1_label, S_IRUGO, label_cpu,         NULL);
static DEVICE_ATTR(temp2_label, S_IRUGO, label_cpu_local,   NULL);
static DEVICE_ATTR(temp3_label, S_IRUGO, label_cpu_DTS,     NULL);
static DEVICE_ATTR(temp4_label, S_IRUGO, label_northbridge, NULL);
static DEVICE_ATTR(temp5_label, S_IRUGO, label_vga,         NULL);
static DEVICE_ATTR(temp6_label, S_IRUGO, label_SKIN,        NULL);
static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, pwm_show, pwm_store);
static DEVICE_ATTR(pwm1_enable,
		   S_IRUGO | S_IWUSR, pwm_enable_show, pwm_enable_store);

static struct attribute *compal_platform_attrs[] = {
	&dev_attr_wake_up_pme.attr,
	&dev_attr_wake_up_modem.attr,
	&dev_attr_wake_up_lan.attr,
	&dev_attr_wake_up_wlan.attr,
	&dev_attr_wake_up_key.attr,
	&dev_attr_wake_up_mouse.attr,
	NULL
};
static const struct attribute_group compal_platform_attr_group = {
	.attrs = compal_platform_attrs
};

static struct attribute *compal_hwmon_attrs[] = {
	&dev_attr_pwm1_enable.attr,
	&dev_attr_pwm1.attr,
	&dev_attr_fan1_input.attr,
	&dev_attr_temp1_input.attr,
	&dev_attr_temp2_input.attr,
	&dev_attr_temp3_input.attr,
	&dev_attr_temp4_input.attr,
	&dev_attr_temp5_input.attr,
	&dev_attr_temp6_input.attr,
	&dev_attr_temp1_label.attr,
	&dev_attr_temp2_label.attr,
	&dev_attr_temp3_label.attr,
	&dev_attr_temp4_label.attr,
	&dev_attr_temp5_label.attr,
	&dev_attr_temp6_label.attr,
	NULL
};
ATTRIBUTE_GROUPS(compal_hwmon);

static int compal_probe(struct platform_device *);
static int compal_remove(struct platform_device *);
static struct platform_driver compal_driver = {
	.driver = {
		.name = DRIVER_NAME,
	},
	.probe	= compal_probe,
	.remove	= compal_remove,
};

static enum power_supply_property compal_bat_properties[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
	POWER_SUPPLY_PROP_CURRENT_AVG,
	POWER_SUPPLY_PROP_POWER_NOW,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
	POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_CAPACITY_LEVEL,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TEMP_AMBIENT,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_MANUFACTURER,
	POWER_SUPPLY_PROP_SERIAL_NUMBER,
};

static struct backlight_device *compalbl_device;

static struct platform_device *compal_device;

static struct rfkill *wifi_rfkill;
static struct rfkill *bt_rfkill;





/* =================================== */
/* Initialization & clean-up functions */
/* =================================== */

static int dmi_check_cb(const struct dmi_system_id *id)
{
	pr_info("Identified laptop model '%s'\n", id->ident);
	extra_features = false;
	return 1;
}

static int dmi_check_cb_extra(const struct dmi_system_id *id)
{
	pr_info("Identified laptop model '%s', enabling extra features\n",
		id->ident);
	extra_features = true;
	return 1;
}

static struct dmi_system_id __initdata compal_dmi_table[] = {
	{
		.ident = "FL90/IFL90",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL90/IFL90",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
			DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL91/IFL91",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FL92/JFL92",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "FT00/IFT00",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
			DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Mini 9",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Mini 10",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Mini 10v",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Mini 1012",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Inspiron 11z",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "Dell Mini 12",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
		},
		.callback = dmi_check_cb
	},
	{
		.ident = "JHL90",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "JHL90"),
			DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
		},
		.callback = dmi_check_cb_extra
	},
	{
		.ident = "KHLB2",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "KHLB2"),
			DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
		},
		.callback = dmi_check_cb_extra
	},
	{ }
};
MODULE_DEVICE_TABLE(dmi, compal_dmi_table);

static const struct power_supply_desc psy_bat_desc = {
	.name		= DRIVER_NAME,
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= compal_bat_properties,
	.num_properties	= ARRAY_SIZE(compal_bat_properties),
	.get_property	= bat_get_property,
	.set_property	= bat_set_property,
	.property_is_writeable = bat_writeable_property,
};

static void initialize_power_supply_data(struct compal_data *data)
{
	ec_read_sequence(BAT_MANUFACTURER_NAME_ADDR,
					data->bat_manufacturer_name,
					BAT_MANUFACTURER_NAME_LEN);
	data->bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN] = 0;

	ec_read_sequence(BAT_MODEL_NAME_ADDR,
					data->bat_model_name,
					BAT_MODEL_NAME_LEN);
	data->bat_model_name[BAT_MODEL_NAME_LEN] = 0;

	scnprintf(data->bat_serial_number, BAT_SERIAL_NUMBER_LEN + 1, "%d",
				ec_read_u16(BAT_SERIAL_NUMBER_ADDR));
}

static void initialize_fan_control_data(struct compal_data *data)
{
	data->pwm_enable = 2; /* Keep motherboard in control for now */
	data->curr_pwm = 255; /* Try not to cause a CPU_on_fire exception
				 if we take over... */
}

static int setup_rfkill(void)
{
	int ret;

	wifi_rfkill = rfkill_alloc("compal-wifi", &compal_device->dev,
				RFKILL_TYPE_WLAN, &compal_rfkill_ops,
				(void *) WIRELESS_WLAN);
	if (!wifi_rfkill)
		return -ENOMEM;

	ret = rfkill_register(wifi_rfkill);
	if (ret)
		goto err_wifi;

	bt_rfkill = rfkill_alloc("compal-bluetooth", &compal_device->dev,
				RFKILL_TYPE_BLUETOOTH, &compal_rfkill_ops,
				(void *) WIRELESS_BT);
	if (!bt_rfkill) {
		ret = -ENOMEM;
		goto err_allocate_bt;
	}
	ret = rfkill_register(bt_rfkill);
	if (ret)
		goto err_register_bt;

	return 0;

err_register_bt:
	rfkill_destroy(bt_rfkill);

err_allocate_bt:
	rfkill_unregister(wifi_rfkill);

err_wifi:
	rfkill_destroy(wifi_rfkill);

	return ret;
}

static int __init compal_init(void)
{
	int ret;

	if (acpi_disabled) {
		pr_err("ACPI needs to be enabled for this driver to work!\n");
		return -ENODEV;
	}

	if (!force && !dmi_check_system(compal_dmi_table)) {
		pr_err("Motherboard not recognized (You could try the module's force-parameter)\n");
		return -ENODEV;
	}

	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
		struct backlight_properties props;
		memset(&props, 0, sizeof(struct backlight_properties));
		props.type = BACKLIGHT_PLATFORM;
		props.max_brightness = BACKLIGHT_LEVEL_MAX;
		compalbl_device = backlight_device_register(DRIVER_NAME,
							    NULL, NULL,
							    &compalbl_ops,
							    &props);
		if (IS_ERR(compalbl_device))
			return PTR_ERR(compalbl_device);
	}

	ret = platform_driver_register(&compal_driver);
	if (ret)
		goto err_backlight;

	compal_device = platform_device_alloc(DRIVER_NAME, -1);
	if (!compal_device) {
		ret = -ENOMEM;
		goto err_platform_driver;
	}

	ret = platform_device_add(compal_device); /* This calls compal_probe */
	if (ret)
		goto err_platform_device;

	ret = setup_rfkill();
	if (ret)
		goto err_rfkill;

	pr_info("Driver " DRIVER_VERSION " successfully loaded\n");
	return 0;

err_rfkill:
	platform_device_del(compal_device);

err_platform_device:
	platform_device_put(compal_device);

err_platform_driver:
	platform_driver_unregister(&compal_driver);

err_backlight:
	backlight_device_unregister(compalbl_device);

	return ret;
}

static int compal_probe(struct platform_device *pdev)
{
	int err;
	struct compal_data *data;
	struct device *hwmon_dev;
	struct power_supply_config psy_cfg = {};

	if (!extra_features)
		return 0;

	/* Fan control */
	data = devm_kzalloc(&pdev->dev, sizeof(struct compal_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	initialize_fan_control_data(data);

	err = sysfs_create_group(&pdev->dev.kobj, &compal_platform_attr_group);
	if (err)
		return err;

	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
							   "compal", data,
							   compal_hwmon_groups);
	if (IS_ERR(hwmon_dev)) {
		err = PTR_ERR(hwmon_dev);
		goto remove;
	}

	/* Power supply */
	initialize_power_supply_data(data);
	psy_cfg.drv_data = data;
	data->psy = power_supply_register(&compal_device->dev, &psy_bat_desc,
					  &psy_cfg);
	if (IS_ERR(data->psy)) {
		err = PTR_ERR(data->psy);
		goto remove;
	}

	platform_set_drvdata(pdev, data);

	return 0;

remove:
	sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
	return err;
}

static void __exit compal_cleanup(void)
{
	platform_device_unregister(compal_device);
	platform_driver_unregister(&compal_driver);
	backlight_device_unregister(compalbl_device);
	rfkill_unregister(wifi_rfkill);
	rfkill_unregister(bt_rfkill);
	rfkill_destroy(wifi_rfkill);
	rfkill_destroy(bt_rfkill);

	pr_info("Driver unloaded\n");
}

static int compal_remove(struct platform_device *pdev)
{
	struct compal_data *data;

	if (!extra_features)
		return 0;

	pr_info("Unloading: resetting fan control to motherboard\n");
	pwm_disable_control();

	data = platform_get_drvdata(pdev);
	power_supply_unregister(data->psy);

	sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);

	return 0;
}


module_init(compal_init);
module_exit(compal_cleanup);

MODULE_AUTHOR("Cezary Jackiewicz");
MODULE_AUTHOR("Roald Frederickx (roald.frederickx@gmail.com)");
MODULE_DESCRIPTION("Compal Laptop Support");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");