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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6-block.git] / drivers / hwmon / via686a.c
CommitLineData
1da177e4 1/*
9004ac81
GR		 2 * via686a.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>,
7 * Mark Studebaker <mdsxyz123@yahoo.com>,
8 * and Bob Dougherty <bobd@stanford.edu>
9 *
10 * (Some conversion-factor data were contributed by Jonathan Teh Soon Yew
11 * <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.)
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 */
1da177e4
LT		 27
28/*
9004ac81
GR		 29 * Supports the Via VT82C686A, VT82C686B south bridges.
30 * Reports all as a 686A.
31 * Warning - only supports a single device.
32 */
1da177e4 33
774f7827
JP		 34#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35
1da177e4
LT		 36#include <linux/module.h>
37#include <linux/slab.h>
38#include <linux/pci.h>
1da177e4 39#include <linux/jiffies.h>
2ec342e6 40#include <linux/platform_device.h>
943b0830 41#include <linux/hwmon.h>
1e71a5a2 42#include <linux/hwmon-sysfs.h>
943b0830 43#include <linux/err.h>
1da177e4 44#include <linux/init.h>
9a61bf63 45#include <linux/mutex.h>
a5ebe668 46#include <linux/sysfs.h>
b9acb64a 47#include <linux/acpi.h>
6055fae8 48#include <linux/io.h>
1da177e4
LT		 49
50
9004ac81
GR		 51/*
52 * If force_addr is set to anything different from 0, we forcibly enable
53 * the device at the given address.
54 */
02002963 55static unsigned short force_addr;
1da177e4
LT		 56module_param(force_addr, ushort, 0);
57MODULE_PARM_DESC(force_addr,
58 "Initialize the base address of the sensors");
59
2ec342e6 60static struct platform_device *pdev;
1da177e4
LT		 61
62/*
9004ac81
GR		 63 * The Via 686a southbridge has a LM78-like chip integrated on the same IC.
64 * This driver is a customized copy of lm78.c
65 */
1da177e4
LT		 66
67/* Many VIA686A constants specified below */
68
69/* Length of ISA address segment */
be8992c2
JD		 70#define VIA686A_EXTENT 0x80
71#define VIA686A_BASE_REG 0x70
72#define VIA686A_ENABLE_REG 0x74
1da177e4
LT		 73
74/* The VIA686A registers */
75/* ins numbered 0-4 */
be8992c2
JD		 76#define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2))
77#define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2))
78#define VIA686A_REG_IN(nr) (0x22 + (nr))
1da177e4
LT		 79
80/* fans numbered 1-2 */
be8992c2
JD		 81#define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr))
82#define VIA686A_REG_FAN(nr) (0x28 + (nr))
1da177e4 83
1da177e4 84/* temps numbered 1-3 */
563db2fe
JD		 85static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f };
86static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d };
87static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e };
be8992c2
JD		 88/* bits 7-6 */
89#define VIA686A_REG_TEMP_LOW1 0x4b
90/* 2 = bits 5-4, 3 = bits 7-6 */
91#define VIA686A_REG_TEMP_LOW23 0x49
92
93#define VIA686A_REG_ALARM1 0x41
94#define VIA686A_REG_ALARM2 0x42
95#define VIA686A_REG_FANDIV 0x47
96#define VIA686A_REG_CONFIG 0x40
9004ac81
GR		 97/*
98 * The following register sets temp interrupt mode (bits 1-0 for temp1,
99 * 3-2 for temp2, 5-4 for temp3). Modes are:
100 * 00 interrupt stays as long as value is out-of-range
101 * 01 interrupt is cleared once register is read (default)
102 * 10 comparator mode- like 00, but ignores hysteresis
103 * 11 same as 00
104 */
be8992c2 105#define VIA686A_REG_TEMP_MODE 0x4b
1da177e4 106/* We'll just assume that you want to set all 3 simultaneously: */
be8992c2
JD		 107#define VIA686A_TEMP_MODE_MASK 0x3F
108#define VIA686A_TEMP_MODE_CONTINUOUS 0x00
1da177e4 109
9004ac81
GR		 110/*
111 * Conversions. Limit checking is only done on the TO_REG
112 * variants.
113 *
114 ******** VOLTAGE CONVERSIONS (Bob Dougherty) ********
115 * From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew):
116 * voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp
117 * voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V
118 * voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V
119 * voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V
120 * voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V
121 * in[i]=(data[i+2]*25.0+133)*voltagefactor[i];
122 * That is:
123 * volts = (25*regVal+133)*factor
124 * regVal = (volts/factor-133)/25
125 * (These conversions were contributed by Jonathan Teh Soon Yew
126 * <j.teh@iname.com>)
127 */
1da177e4
LT		 128static inline u8 IN_TO_REG(long val, int inNum)
129{
9004ac81
GR		 130 /*
131 * To avoid floating point, we multiply constants by 10 (100 for +12V).
132 * Rounding is done (120500 is actually 133000 - 12500).
133 * Remember that val is expressed in 0.001V/bit, which is why we divide
134 * by an additional 10000 (100000 for +12V): 1000 for val and 10 (100)
135 * for the constants.
136 */
1da177e4
LT		 137 if (inNum <= 1)
138 return (u8)
139 SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255);
140 else if (inNum == 2)
141 return (u8)
142 SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255);
143 else if (inNum == 3)
144 return (u8)
145 SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255);
146 else
147 return (u8)
148 SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255);
149}
150
151static inline long IN_FROM_REG(u8 val, int inNum)
152{
9004ac81
GR		 153 /*
154 * To avoid floating point, we multiply constants by 10 (100 for +12V).
155 * We also multiply them by 1000 because we want 0.001V/bit for the
156 * output value. Rounding is done.
157 */
1da177e4
LT		 158 if (inNum <= 1)
159 return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024);
160 else if (inNum == 2)
161 return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737);
162 else if (inNum == 3)
163 return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108);
164 else
165 return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714);
166}
167
168/********* FAN RPM CONVERSIONS ********/
9004ac81
GR		 169/*
170 * Higher register values = slower fans (the fan's strobe gates a counter).
171 * But this chip saturates back at 0, not at 255 like all the other chips.
172 * So, 0 means 0 RPM
173 */
1da177e4
LT		 174static inline u8 FAN_TO_REG(long rpm, int div)
175{
176 if (rpm == 0)
177 return 0;
178 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
179 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255);
180}
181
9004ac81
GR		 182#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (val) == 255 ? 0 : 1350000 / \
183 ((val) * (div)))
1da177e4
LT		 184
185/******** TEMP CONVERSIONS (Bob Dougherty) *********/
9004ac81
GR		 186/*
187 * linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew)
188 * if(temp<169)
189 * return double(temp)*0.427-32.08;
190 * else if(temp>=169 && temp<=202)
191 * return double(temp)*0.582-58.16;
192 * else
193 * return double(temp)*0.924-127.33;
194 *
195 * A fifth-order polynomial fits the unofficial data (provided by Alex van
196 * Kaam <darkside@chello.nl>) a bit better. It also give more reasonable
197 * numbers on my machine (ie. they agree with what my BIOS tells me).
198 * Here's the fifth-order fit to the 8-bit data:
199 * temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 -
200 * 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0.
201 *
202 * (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for
203 * finding my typos in this formula!)
204 *
205 * Alas, none of the elegant function-fit solutions will work because we
206 * aren't allowed to use floating point in the kernel and doing it with
207 * integers doesn't provide enough precision. So we'll do boring old
208 * look-up table stuff. The unofficial data (see below) have effectively
209 * 7-bit resolution (they are rounded to the nearest degree). I'm assuming
210 * that the transfer function of the device is monotonic and smooth, so a
211 * smooth function fit to the data will allow us to get better precision.
212 * I used the 5th-order poly fit described above and solved for
213 * VIA register values 0-255. I *10 before rounding, so we get tenth-degree
214 * precision. (I could have done all 1024 values for our 10-bit readings,
215 * but the function is very linear in the useful range (0-80 deg C), so
216 * we'll just use linear interpolation for 10-bit readings.) So, tempLUT
217 * is the temp at via register values 0-255:
218 */
219static const s16 tempLUT[] = {
220 -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519,
be8992c2
JD		 221 -503, -487, -471, -456, -442, -428, -414, -400, -387, -375,
222 -362, -350, -339, -327, -316, -305, -295, -285, -275, -265,
223 -255, -246, -237, -229, -220, -212, -204, -196, -188, -180,
224 -173, -166, -159, -152, -145, -139, -132, -126, -120, -114,
225 -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49,
226 -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16,
227 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84,
228 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138,
229 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189,
230 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241,
231 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294,
232 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348,
233 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404,
234 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464,
235 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532,
236 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614,
237 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718,
238 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856,
239 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044,
240 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252,
241 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462
1da177e4
LT		 242};
243
9004ac81
GR		 244/*
245 * the original LUT values from Alex van Kaam <darkside@chello.nl>
246 * (for via register values 12-240):
247 * {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31,
248 * -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15,
249 * -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3,
250 * -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12,
251 * 12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22,
252 * 22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33,
253 * 33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45,
254 * 45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60,
255 * 61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84,
256 * 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110};
257 *
258 *
259 * Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed
260 * an extra term for a good fit to these inverse data!) and then
261 * solving for each temp value from -50 to 110 (the useable range for
262 * this chip). Here's the fit:
263 * viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4
264 * - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01)
265 * Note that n=161:
266 */
267static const u8 viaLUT[] = {
268 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23,
be8992c2
JD		 269 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40,
270 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66,
271 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100,
272 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129,
273 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156,
274 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
275 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199,
276 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213,
277 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224,
278 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232,
279 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
280 239, 240
1da177e4
LT		 281};
282
9004ac81
GR		 283/*
284 * Converting temps to (8-bit) hyst and over registers
285 * No interpolation here.
286 * The +50 is because the temps start at -50
287 */
1da177e4
LT		 288static inline u8 TEMP_TO_REG(long val)
289{
be8992c2 290 return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 :
1da177e4
LT		 291 (val < 0 ? val - 500 : val + 500) / 1000 + 50];
292}
293
294/* for 8-bit temperature hyst and over registers */
088341bd 295#define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100)
1da177e4
LT		 296
297/* for 10-bit temperature readings */
298static inline long TEMP_FROM_REG10(u16 val)
299{
300 u16 eightBits = val >> 2;
301 u16 twoBits = val & 3;
302
303 /* no interpolation for these */
304 if (twoBits == 0 || eightBits == 255)
305 return TEMP_FROM_REG(eightBits);
306
307 /* do some linear interpolation */
308 return (tempLUT[eightBits] * (4 - twoBits) +
be8992c2 309 tempLUT[eightBits + 1] * twoBits) * 25;
1da177e4
LT		 310}
311
1da177e4 312#define DIV_FROM_REG(val) (1 << (val))
9004ac81 313#define DIV_TO_REG(val) ((val) == 8 ? 3 : (val) == 4 ? 2 : (val) == 1 ? 0 : 1)
1da177e4 314
9004ac81
GR		 315/*
316 * For each registered chip, we need to keep some data in memory.
317 * The structure is dynamically allocated.
318 */
1da177e4 319struct via686a_data {
2ec342e6
JD		 320 unsigned short addr;
321 const char *name;
1beeffe4 322 struct device *hwmon_dev;
9a61bf63 323 struct mutex update_lock;
1da177e4
LT		 324 char valid; /* !=0 if following fields are valid */
325 unsigned long last_updated; /* In jiffies */
326
327 u8 in[5]; /* Register value */
328 u8 in_max[5]; /* Register value */
329 u8 in_min[5]; /* Register value */
330 u8 fan[2]; /* Register value */
331 u8 fan_min[2]; /* Register value */
332 u16 temp[3]; /* Register value 10 bit */
333 u8 temp_over[3]; /* Register value */
334 u8 temp_hyst[3]; /* Register value */
335 u8 fan_div[2]; /* Register encoding, shifted right */
336 u16 alarms; /* Register encoding, combined */
337};
338
339static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
340
2ec342e6 341static int via686a_probe(struct platform_device *pdev);
d0546128 342static int __devexit via686a_remove(struct platform_device *pdev);
1da177e4 343
2ec342e6 344static inline int via686a_read_value(struct via686a_data *data, u8 reg)
1da177e4 345{
2ec342e6 346 return inb_p(data->addr + reg);
1da177e4
LT		 347}
348
2ec342e6 349static inline void via686a_write_value(struct via686a_data *data, u8 reg,
1da177e4
LT		 350 u8 value)
351{
2ec342e6 352 outb_p(value, data->addr + reg);
1da177e4
LT		 353}
354
355static struct via686a_data *via686a_update_device(struct device *dev);
2ec342e6 356static void via686a_init_device(struct via686a_data *data);
1da177e4
LT		 357
358/* following are the sysfs callback functions */
359
360/* 7 voltage sensors */
1e71a5a2
JD		 361static ssize_t show_in(struct device *dev, struct device_attribute *da,
362 char *buf) {
1da177e4 363 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 364 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
365 int nr = attr->index;
1da177e4
LT		 366 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr));
367}
368
1e71a5a2
JD		 369static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
370 char *buf) {
1da177e4 371 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 372 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
373 int nr = attr->index;
1da177e4
LT		 374 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr));
375}
376
1e71a5a2
JD		 377static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
378 char *buf) {
1da177e4 379 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 380 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
381 int nr = attr->index;
1da177e4
LT		 382 return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr));
383}
384
1e71a5a2
JD		 385static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
386 const char *buf, size_t count) {
2ec342e6 387 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 388 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
389 int nr = attr->index;
9004ac81
GR		 390 unsigned long val;
391 int err;
392
393 err = kstrtoul(buf, 10, &val);
394 if (err)
395 return err;
1da177e4 396
9a61bf63 397 mutex_lock(&data->update_lock);
be8992c2 398 data->in_min[nr] = IN_TO_REG(val, nr);
2ec342e6 399 via686a_write_value(data, VIA686A_REG_IN_MIN(nr),
1da177e4 400 data->in_min[nr]);
9a61bf63 401 mutex_unlock(&data->update_lock);
1da177e4
LT		 402 return count;
403}
1e71a5a2
JD		 404static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
405 const char *buf, size_t count) {
2ec342e6 406 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 407 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
408 int nr = attr->index;
9004ac81
GR		 409 unsigned long val;
410 int err;
411
412 err = kstrtoul(buf, 10, &val);
413 if (err)
414 return err;
1da177e4 415
9a61bf63 416 mutex_lock(&data->update_lock);
be8992c2 417 data->in_max[nr] = IN_TO_REG(val, nr);
2ec342e6 418 via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
1da177e4 419 data->in_max[nr]);
9a61bf63 420 mutex_unlock(&data->update_lock);
1da177e4
LT		 421 return count;
422}
423#define show_in_offset(offset) \
1e71a5a2
JD		 424static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
425 show_in, NULL, offset); \
426static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
427 show_in_min, set_in_min, offset); \
428static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
429 show_in_max, set_in_max, offset);
1da177e4
LT		 430
431show_in_offset(0);
432show_in_offset(1);
433show_in_offset(2);
434show_in_offset(3);
435show_in_offset(4);
436
437/* 3 temperatures */
1e71a5a2
JD		 438static ssize_t show_temp(struct device *dev, struct device_attribute *da,
439 char *buf) {
1da177e4 440 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 441 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
442 int nr = attr->index;
1da177e4
LT		 443 return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr]));
444}
1e71a5a2
JD		 445static ssize_t show_temp_over(struct device *dev, struct device_attribute *da,
446 char *buf) {
1da177e4 447 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 448 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
449 int nr = attr->index;
1da177e4
LT		 450 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr]));
451}
1e71a5a2
JD		 452static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da,
453 char *buf) {
1da177e4 454 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 455 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
456 int nr = attr->index;
1da177e4
LT		 457 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr]));
458}
1e71a5a2
JD		 459static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
460 const char *buf, size_t count) {
2ec342e6 461 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 462 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
463 int nr = attr->index;
9004ac81
GR		 464 long val;
465 int err;
466
467 err = kstrtol(buf, 10, &val);
468 if (err)
469 return err;
1da177e4 470
9a61bf63 471 mutex_lock(&data->update_lock);
1da177e4 472 data->temp_over[nr] = TEMP_TO_REG(val);
2ec342e6 473 via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
563db2fe 474 data->temp_over[nr]);
9a61bf63 475 mutex_unlock(&data->update_lock);
1da177e4
LT		 476 return count;
477}
1e71a5a2
JD		 478static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
479 const char *buf, size_t count) {
2ec342e6 480 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 481 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
482 int nr = attr->index;
9004ac81
GR		 483 long val;
484 int err;
485
486 err = kstrtol(buf, 10, &val);
487 if (err)
488 return err;
1da177e4 489
9a61bf63 490 mutex_lock(&data->update_lock);
1da177e4 491 data->temp_hyst[nr] = TEMP_TO_REG(val);
2ec342e6 492 via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
563db2fe 493 data->temp_hyst[nr]);
9a61bf63 494 mutex_unlock(&data->update_lock);
1da177e4
LT		 495 return count;
496}
497#define show_temp_offset(offset) \
1e71a5a2
JD		 498static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
499 show_temp, NULL, offset - 1); \
500static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
501 show_temp_over, set_temp_over, offset - 1); \
502static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
503 show_temp_hyst, set_temp_hyst, offset - 1);
1da177e4
LT		 504
505show_temp_offset(1);
506show_temp_offset(2);
507show_temp_offset(3);
508
509/* 2 Fans */
1e71a5a2
JD		 510static ssize_t show_fan(struct device *dev, struct device_attribute *da,
511 char *buf) {
1da177e4 512 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 513 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
514 int nr = attr->index;
be8992c2 515 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
9004ac81 516 DIV_FROM_REG(data->fan_div[nr])));
1da177e4 517}
1e71a5a2
JD		 518static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
519 char *buf) {
1da177e4 520 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 521 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
522 int nr = attr->index;
be8992c2 523 return sprintf(buf, "%d\n",
9004ac81
GR		 524 FAN_FROM_REG(data->fan_min[nr],
525 DIV_FROM_REG(data->fan_div[nr])));
1da177e4 526}
1e71a5a2
JD		 527static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
528 char *buf) {
1da177e4 529 struct via686a_data *data = via686a_update_device(dev);
1e71a5a2
JD		 530 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
531 int nr = attr->index;
9004ac81 532 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 533}
1e71a5a2
JD		 534static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
535 const char *buf, size_t count) {
2ec342e6 536 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 537 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
538 int nr = attr->index;
9004ac81
GR		 539 unsigned long val;
540 int err;
541
542 err = kstrtoul(buf, 10, &val);
543 if (err)
544 return err;
1da177e4 545
9a61bf63 546 mutex_lock(&data->update_lock);
1da177e4 547 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
2ec342e6 548 via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
9a61bf63 549 mutex_unlock(&data->update_lock);
1da177e4
LT		 550 return count;
551}
1e71a5a2
JD		 552static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
553 const char *buf, size_t count) {
2ec342e6 554 struct via686a_data *data = dev_get_drvdata(dev);
1e71a5a2
JD		 555 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
556 int nr = attr->index;
1da177e4 557 int old;
9004ac81
GR		 558 unsigned long val;
559 int err;
560
561 err = kstrtoul(buf, 10, &val);
562 if (err)
563 return err;
1da177e4 564
9a61bf63 565 mutex_lock(&data->update_lock);
2ec342e6 566 old = via686a_read_value(data, VIA686A_REG_FANDIV);
1da177e4
LT		 567 data->fan_div[nr] = DIV_TO_REG(val);
568 old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
2ec342e6 569 via686a_write_value(data, VIA686A_REG_FANDIV, old);
9a61bf63 570 mutex_unlock(&data->update_lock);
1da177e4
LT		 571 return count;
572}
573
574#define show_fan_offset(offset) \
1e71a5a2
JD		 575static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
576 show_fan, NULL, offset - 1); \
577static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
578 show_fan_min, set_fan_min, offset - 1); \
579static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
580 show_fan_div, set_fan_div, offset - 1);
1da177e4
LT		 581
582show_fan_offset(1);
583show_fan_offset(2);
584
585/* Alarms */
9004ac81
GR		 586static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
587 char *buf)
588{
1da177e4 589 struct via686a_data *data = via686a_update_device(dev);
68188ba7 590 return sprintf(buf, "%u\n", data->alarms);
1da177e4 591}
9004ac81 592
1d66c64c 593static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4 594
13ff05e9
JD		 595static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
596 char *buf)
597{
598 int bitnr = to_sensor_dev_attr(attr)->index;
599 struct via686a_data *data = via686a_update_device(dev);
600 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
601}
602static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
603static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
604static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
605static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
606static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
607static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
608static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11);
609static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 15);
610static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
611static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
612
2ec342e6
JD		 613static ssize_t show_name(struct device *dev, struct device_attribute
614 *devattr, char *buf)
615{
616 struct via686a_data *data = dev_get_drvdata(dev);
617 return sprintf(buf, "%s\n", data->name);
618}
619static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
620
a5ebe668 621static struct attribute *via686a_attributes[] = {
1e71a5a2
JD		 622 &sensor_dev_attr_in0_input.dev_attr.attr,
623 &sensor_dev_attr_in1_input.dev_attr.attr,
624 &sensor_dev_attr_in2_input.dev_attr.attr,
625 &sensor_dev_attr_in3_input.dev_attr.attr,
626 &sensor_dev_attr_in4_input.dev_attr.attr,
627 &sensor_dev_attr_in0_min.dev_attr.attr,
628 &sensor_dev_attr_in1_min.dev_attr.attr,
629 &sensor_dev_attr_in2_min.dev_attr.attr,
630 &sensor_dev_attr_in3_min.dev_attr.attr,
631 &sensor_dev_attr_in4_min.dev_attr.attr,
632 &sensor_dev_attr_in0_max.dev_attr.attr,
633 &sensor_dev_attr_in1_max.dev_attr.attr,
634 &sensor_dev_attr_in2_max.dev_attr.attr,
635 &sensor_dev_attr_in3_max.dev_attr.attr,
636 &sensor_dev_attr_in4_max.dev_attr.attr,
13ff05e9
JD		 637 &sensor_dev_attr_in0_alarm.dev_attr.attr,
638 &sensor_dev_attr_in1_alarm.dev_attr.attr,
639 &sensor_dev_attr_in2_alarm.dev_attr.attr,
640 &sensor_dev_attr_in3_alarm.dev_attr.attr,
641 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1e71a5a2
JD		 642
643 &sensor_dev_attr_temp1_input.dev_attr.attr,
644 &sensor_dev_attr_temp2_input.dev_attr.attr,
645 &sensor_dev_attr_temp3_input.dev_attr.attr,
646 &sensor_dev_attr_temp1_max.dev_attr.attr,
647 &sensor_dev_attr_temp2_max.dev_attr.attr,
648 &sensor_dev_attr_temp3_max.dev_attr.attr,
649 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
650 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
651 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
13ff05e9
JD		 652 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
653 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
654 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1e71a5a2
JD		 655
656 &sensor_dev_attr_fan1_input.dev_attr.attr,
657 &sensor_dev_attr_fan2_input.dev_attr.attr,
658 &sensor_dev_attr_fan1_min.dev_attr.attr,
659 &sensor_dev_attr_fan2_min.dev_attr.attr,
660 &sensor_dev_attr_fan1_div.dev_attr.attr,
661 &sensor_dev_attr_fan2_div.dev_attr.attr,
13ff05e9
JD		 662 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
663 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
a5ebe668
JD		 664
665 &dev_attr_alarms.attr,
2ec342e6 666 &dev_attr_name.attr,
a5ebe668
JD		 667 NULL
668};
669
670static const struct attribute_group via686a_group = {
671 .attrs = via686a_attributes,
672};
673
2ec342e6 674static struct platform_driver via686a_driver = {
cdaf7934 675 .driver = {
87218842 676 .owner = THIS_MODULE,
cdaf7934
LR		 677 .name = "via686a",
678 },
2ec342e6
JD		 679 .probe = via686a_probe,
680 .remove = __devexit_p(via686a_remove),
1da177e4
LT		 681};
682
683
684/* This is called when the module is loaded */
2ec342e6 685static int __devinit via686a_probe(struct platform_device *pdev)
1da177e4 686{
1da177e4 687 struct via686a_data *data;
2ec342e6
JD		 688 struct resource *res;
689 int err;
1da177e4
LT		 690
691 /* Reserve the ISA region */
2ec342e6 692 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
fd55bc00
GR		 693 if (!devm_request_region(&pdev->dev, res->start, VIA686A_EXTENT,
694 via686a_driver.driver.name)) {
2ec342e6
JD		 695 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
696 (unsigned long)res->start, (unsigned long)res->end);
1da177e4
LT		 697 return -ENODEV;
698 }
699
fd55bc00
GR		 700 data = devm_kzalloc(&pdev->dev, sizeof(struct via686a_data),
701 GFP_KERNEL);
702 if (!data)
703 return -ENOMEM;
1da177e4 704
2ec342e6
JD		 705 platform_set_drvdata(pdev, data);
706 data->addr = res->start;
707 data->name = "via686a";
9a61bf63 708 mutex_init(&data->update_lock);
be8992c2 709
1da177e4 710 /* Initialize the VIA686A chip */
2ec342e6 711 via686a_init_device(data);
1da177e4
LT		 712
713 /* Register sysfs hooks */
9004ac81
GR		 714 err = sysfs_create_group(&pdev->dev.kobj, &via686a_group);
715 if (err)
fd55bc00 716 return err;
a5ebe668 717
1beeffe4
TJ		 718 data->hwmon_dev = hwmon_device_register(&pdev->dev);
719 if (IS_ERR(data->hwmon_dev)) {
720 err = PTR_ERR(data->hwmon_dev);
a5ebe668 721 goto exit_remove_files;
943b0830
MH		 722 }
723
1da177e4
LT		 724 return 0;
725
a5ebe668 726exit_remove_files:
2ec342e6 727 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
1da177e4
LT		 728 return err;
729}
730
2ec342e6 731static int __devexit via686a_remove(struct platform_device *pdev)
1da177e4 732{
2ec342e6 733 struct via686a_data *data = platform_get_drvdata(pdev);
1da177e4 734
1beeffe4 735 hwmon_device_unregister(data->hwmon_dev);
2ec342e6 736 sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
943b0830 737
1da177e4
LT		 738 return 0;
739}
740
f790674d
JD		 741static void via686a_update_fan_div(struct via686a_data *data)
742{
743 int reg = via686a_read_value(data, VIA686A_REG_FANDIV);
744 data->fan_div[0] = (reg >> 4) & 0x03;
745 data->fan_div[1] = reg >> 6;
746}
747
2ec342e6 748static void __devinit via686a_init_device(struct via686a_data *data)
1da177e4
LT		 749{
750 u8 reg;
751
752 /* Start monitoring */
2ec342e6
JD		 753 reg = via686a_read_value(data, VIA686A_REG_CONFIG);
754 via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
1da177e4
LT		 755
756 /* Configure temp interrupt mode for continuous-interrupt operation */
2ec342e6
JD		 757 reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
758 via686a_write_value(data, VIA686A_REG_TEMP_MODE,
58fe0809
JD		 759 (reg & ~VIA686A_TEMP_MODE_MASK)
760 | VIA686A_TEMP_MODE_CONTINUOUS);
f790674d
JD		 761
762 /* Pre-read fan clock divisor values */
763 via686a_update_fan_div(data);
1da177e4
LT		 764}
765
766static struct via686a_data *via686a_update_device(struct device *dev)
767{
2ec342e6 768 struct via686a_data *data = dev_get_drvdata(dev);
1da177e4
LT		 769 int i;
770
9a61bf63 771 mutex_lock(&data->update_lock);
1da177e4
LT		 772
773 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
774 || !data->valid) {
775 for (i = 0; i <= 4; i++) {
776 data->in[i] =
2ec342e6
JD		 777 via686a_read_value(data, VIA686A_REG_IN(i));
778 data->in_min[i] = via686a_read_value(data,
1da177e4
LT		 779 VIA686A_REG_IN_MIN
780 (i));
781 data->in_max[i] =
2ec342e6 782 via686a_read_value(data, VIA686A_REG_IN_MAX(i));
1da177e4
LT		 783 }
784 for (i = 1; i <= 2; i++) {
785 data->fan[i - 1] =
2ec342e6
JD		 786 via686a_read_value(data, VIA686A_REG_FAN(i));
787 data->fan_min[i - 1] = via686a_read_value(data,
1da177e4
LT		 788 VIA686A_REG_FAN_MIN(i));
789 }
790 for (i = 0; i <= 2; i++) {
2ec342e6 791 data->temp[i] = via686a_read_value(data,
563db2fe 792 VIA686A_REG_TEMP[i]) << 2;
1da177e4 793 data->temp_over[i] =
2ec342e6 794 via686a_read_value(data,
563db2fe 795 VIA686A_REG_TEMP_OVER[i]);
1da177e4 796 data->temp_hyst[i] =
2ec342e6 797 via686a_read_value(data,
563db2fe 798 VIA686A_REG_TEMP_HYST[i]);
1da177e4 799 }
9004ac81
GR		 800 /*
801 * add in lower 2 bits
802 * temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1
803 * temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
804 * temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
1da177e4 805 */
2ec342e6 806 data->temp[0] |= (via686a_read_value(data,
1da177e4
LT		 807 VIA686A_REG_TEMP_LOW1)
808 & 0xc0) >> 6;
809 data->temp[1] |=
2ec342e6 810 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
1da177e4
LT		 811 0x30) >> 4;
812 data->temp[2] |=
2ec342e6 813 (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
1da177e4
LT		 814 0xc0) >> 6;
815
f790674d 816 via686a_update_fan_div(data);
1da177e4 817 data->alarms =
2ec342e6 818 via686a_read_value(data,
1da177e4 819 VIA686A_REG_ALARM1) |
2ec342e6 820 (via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
1da177e4
LT		 821 data->last_updated = jiffies;
822 data->valid = 1;
823 }
824
9a61bf63 825 mutex_unlock(&data->update_lock);
1da177e4
LT		 826
827 return data;
828}
829
600151b9 830static DEFINE_PCI_DEVICE_TABLE(via686a_pci_ids) = {
be8992c2 831 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) },
9004ac81 832 { }
1da177e4 833};
1da177e4
LT		 834MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
835
2ec342e6
JD		 836static int __devinit via686a_device_add(unsigned short address)
837{
838 struct resource res = {
839 .start = address,
840 .end = address + VIA686A_EXTENT - 1,
841 .name = "via686a",
842 .flags = IORESOURCE_IO,
843 };
844 int err;
845
b9acb64a
JD		 846 err = acpi_check_resource_conflict(&res);
847 if (err)
848 goto exit;
849
2ec342e6
JD		 850 pdev = platform_device_alloc("via686a", address);
851 if (!pdev) {
852 err = -ENOMEM;
774f7827 853 pr_err("Device allocation failed\n");
2ec342e6
JD		 854 goto exit;
855 }
856
857 err = platform_device_add_resources(pdev, &res, 1);
858 if (err) {
774f7827 859 pr_err("Device resource addition failed (%d)\n", err);
2ec342e6
JD		 860 goto exit_device_put;
861 }
862
863 err = platform_device_add(pdev);
864 if (err) {
774f7827 865 pr_err("Device addition failed (%d)\n", err);
2ec342e6
JD		 866 goto exit_device_put;
867 }
868
869 return 0;
870
871exit_device_put:
872 platform_device_put(pdev);
873exit:
874 return err;
875}
876
1da177e4 877static int __devinit via686a_pci_probe(struct pci_dev *dev,
be8992c2 878 const struct pci_device_id *id)
1da177e4 879{
2ec342e6 880 u16 address, val;
be8992c2 881
2ec342e6
JD		 882 if (force_addr) {
883 address = force_addr & ~(VIA686A_EXTENT - 1);
884 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
885 if (PCIBIOS_SUCCESSFUL !=
886 pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
887 return -ENODEV;
888 }
be8992c2
JD		 889 if (PCIBIOS_SUCCESSFUL !=
890 pci_read_config_word(dev, VIA686A_BASE_REG, &val))
891 return -ENODEV;
892
2d8672c5 893 address = val & ~(VIA686A_EXTENT - 1);
2ec342e6 894 if (address == 0) {
be8992c2
JD		 895 dev_err(&dev->dev, "base address not set - upgrade BIOS "
896 "or use force_addr=0xaddr\n");
897 return -ENODEV;
898 }
be8992c2 899
2ec342e6
JD		 900 if (PCIBIOS_SUCCESSFUL !=
901 pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
902 return -ENODEV;
903 if (!(val & 0x0001)) {
904 if (!force_addr) {
905 dev_warn(&dev->dev, "Sensors disabled, enable "
906 "with force_addr=0x%x\n", address);
907 return -ENODEV;
908 }
909
910 dev_warn(&dev->dev, "Enabling sensors\n");
911 if (PCIBIOS_SUCCESSFUL !=
912 pci_write_config_word(dev, VIA686A_ENABLE_REG,
913 val | 0x0001))
914 return -ENODEV;
1da177e4
LT		 915 }
916
2ec342e6
JD		 917 if (platform_driver_register(&via686a_driver))
918 goto exit;
919
920 /* Sets global pdev as a side effect */
921 if (via686a_device_add(address))
922 goto exit_unregister;
923
9004ac81
GR		 924 /*
925 * Always return failure here. This is to allow other drivers to bind
1da177e4
LT		 926 * to this pci device. We don't really want to have control over the
927 * pci device, we only wanted to read as few register values from it.
928 */
2ec342e6
JD		 929 s_bridge = pci_dev_get(dev);
930 return -ENODEV;
931
932exit_unregister:
933 platform_driver_unregister(&via686a_driver);
934exit:
1da177e4
LT		 935 return -ENODEV;
936}
937
938static struct pci_driver via686a_pci_driver = {
be8992c2
JD		 939 .name = "via686a",
940 .id_table = via686a_pci_ids,
941 .probe = via686a_pci_probe,
1da177e4
LT		 942};
943
944static int __init sm_via686a_init(void)
945{
be8992c2 946 return pci_register_driver(&via686a_pci_driver);
1da177e4
LT		 947}
948
949static void __exit sm_via686a_exit(void)
950{
951 pci_unregister_driver(&via686a_pci_driver);
952 if (s_bridge != NULL) {
2ec342e6
JD		 953 platform_device_unregister(pdev);
954 platform_driver_unregister(&via686a_driver);
1da177e4
LT		 955 pci_dev_put(s_bridge);
956 s_bridge = NULL;
957 }
958}
959
96de0e25 960MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, "
be8992c2
JD		 961 "Mark Studebaker <mdsxyz123@yahoo.com> "
962 "and Bob Dougherty <bobd@stanford.edu>");
1da177e4
LT		 963MODULE_DESCRIPTION("VIA 686A Sensor device");
964MODULE_LICENSE("GPL");
965
966module_init(sm_via686a_init);
967module_exit(sm_via686a_exit);
Linux 6.x block layer and io_uring tree(s)