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w83781d @ 1148

Revision 1148, 32.2 KB (checked in by mds, 12 years ago)

Asus board help. Thanks

Patrick Tullmann <tullmann@…>

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1	Kernel driver `w83781d.o'
2	=========================
3
4	Status: W83781D support is complete and well-tested.
5	W83782D support is complete and well-tested.
6	W83783S support is complete but has not been well-tested.
7	W83627HF support is complete but has not been well-tested.
8	AS99127F support is BETA and has known problems due to lack of a
9	chip datasheet. SEE BELOW.
10
11	Supported chips:
12	* Winbond W83781D
13	Prefix 'w83781d'
14	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
15	Datasheet: Publicly available at the Winbond website (www.winbond.com.tw)
16	* Winbond W83782D
17	Prefix 'w83782d'
18	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
19	Datasheet: Publicly available at the Winbond website
20	* Winbond W83783S
21	Prefix 'w83783s'
22	Addresses scanned: I2C 0x20 - 0x2f (inclusive)
23	Datasheet: Publicly available at the Winbond website
24	* Winbond W83627HF
25	Prefix 'w83627hf'
26	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
27	Datasheet: Publicly available at the Winbond website
28	* Asus AS99127F
29	Prefix 'as99127f'
30	Addresses scanned: I2C 0x20 - 0x2f (inclusive)
31	Datasheet: Unavailable from Asus
32
33
34	Authors: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>,
35	and Mark Studebaker <mdsxyz123@yahoo.com>
36
37
38	Module Parameters
39	-----------------
40
41	* force: short array (min = 1, max = 48)
42	List of adapter,address pairs to boldly assume to be present
43	* force_w83781d: short array (min = 1, max = 48)
44	List of adapter,address pairs which are unquestionably assumed to contain
45	a `w83781d' chip
46	* force_w83782d:
47	Ditto
48	* force_w83783s:
49	Ditto
50	* force_w83627hf:
51	Ditto
52	* force_as99127f:
53	Ditto
54	* ignore: short array (min = 1, max = 48)
55	List of adapter,address pairs not to scan
56	* ignore_range: short array (min = 1, max = 48)
57	List of adapter,start-addr,end-addr triples not to scan
58	* probe: short array (min = 1, max = 48)
59	List of adapter,address pairs to scan additionally
60	* probe_range: short array (min = 1, max = 48)
61	List of adapter,start-addr,end-addr triples to scan additionally
62
63
64	Description
65	-----------
66
67	This driver implements support for the Winbond W83781D, W83782D,
68	W8783S, and W83627HF chips, and the Asus AS99127F.
69	We will refer to them collectively as W8378* chips.
70
71	There is quite some difference between these chips, but they are similar
72	enough that it was sensible to put them together in one driver.
73	The W83627HF chip is assumed to be identical to the ISA W83782D.
74	The AS99127F chip is similar to an I2C-only W83782D.
75
76	Detection of these chips can sometimes be foiled because they can be in
77	an internal state that allows no clean access. If you know the address
78	of the chip, use a 'force' parameter; this will put them into a more
79	well-behaved state first.
80
81	The W8378* implements temperature sensors (three on the W83781D and W83782D,
82	two on the W83783S), three FAN rotation speed sensors, voltage sensors
83	(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
84	lines, alarms with beep warnings, and some miscellaneous stuff.
85
86	Temperatures are measured in degrees Celcius. There is always one main
87	temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
88	sensors. An alarm is triggered for the main sensor once when the
89	Overtemperature Shutdown limit is crossed; it is triggered again as soon as
90	it drops below the Hysteresis value. A more useful behaviour
91	can be found by setting the Hysteresis value to +127 degrees Celcius; in
92	this case, alarms are issued during all the time when the actual temperature
93	is above the Overtemperature Shutdown value. For the other sensor(s), an
94	alarm is triggered when the temperature gets higher then the Overtemperature
95	Shutdown value; it stays on until the temperature falls below the Hysteresis
96	value. But on the W83781D, there is only one alarm that functions for both
97	other sensors! Temperatures are guaranteed within a range of -55 to +125
98	degrees. The main temperature sensors has a resolution of 1 degree; the other
99	sensor(s) of 0.5 degree.
100
101	FAN rotation speeds are reported in RPM (rotations per minute). An alarm is
102	triggered if the rotation speed has dropped below a programmable limit. FAN
103	readings can be divided by a programmable divider (1, 2, 4 or 8 for the
104	W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
105	the readings more range or accuracy. This is important because some FANs
106	report only one 'tick' each rotation, while others report two - making
107	all readings twice as high. Not all RPM values can accurately be represented,
108	so some rounding is done. With a divider of 2, the lowest representable
109	value is around 2600 RPM.
110
111	Voltage sensors (also known as IN sensors) report their values in volts.
112	An alarm is triggered if the voltage has crossed a programmable minimum
113	or maximum limit. Note that minimum in this case always means 'closest to
114	zero'; this is important for negative voltage measurements. All voltage
115	inputs can measure voltages between 0 and 4.08 volts, with a resolution
116	of 0.016 volt.
117
118	The VID lines encode the core voltage value: the voltage level your processor
119	should work with. This is hardcoded by the mainboard and/or processor itself.
120	It is a value in volts. When it is unconnected, you will often find the
121	value 3.50 V here.
122
123	The W83782D and W83783S temperature conversion machine understands about
124	several kinds of temperature probes. You can program the so-called
125	beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
126	TN3904 transistor, and 3435 the default thermistor value. Other values
127	are (not yet) supported. You can program your own values through the
128	rt interface, but this is not very useful, because these tables are
129	under NDA.
130
131	In addition to the alarms described above, there is a CHAS alarm on the
132	chips which triggers if your computer case is open.
133
134	When an alarm goes off, you can be warned by a beeping signal through
135	your computer speaker. It is possible to enable all beeping globally,
136	or only the beeping for some alarms.
137
138	If an alarm triggers, it will remain triggered until the hardware register
139	is read at least once. This means that the cause for the alarm may
140	already have disappeared! Note that in the current implementation, all
141	hardware registers are read whenever any data is read (unless it is less
142	than 1.5 seconds since the last update). This means that you can easily
143	miss once-only alarms.
144
145	The chips only update values each 1.5 seconds; reading them more often
146	will do no harm, but will return 'old' values.
147
148
149	W8378* PROBLEMS
150	-----------------
151	Known problems:
152	- Some chips are misidentified.
153	This is caused by the chip having the wrong WCHIPID register
154	value, so there is no fix. The workaround is to use the
155	force_CHIP parameter.
156	(modprobe w83781d force_CHIP=BUS,0x2d where CHIP is the chip name
157	and BUS is your i2c bus number -
158	cat /proc/bus/i2c to see a list of bus numbers)
159
160
161	AS99127F PROBLEMS
162	-----------------
163	The as99127f support was developed without the benefit of a datasheet.
164	In most cases it is treated as a w83781d.
165	This support will be BETA until a datasheet is released.
166	One user has reported problems with fans stopping
167	occasionally.
168
169	Note that the individual beep bits are inverted from the other chips.
170	That is, in the second entry in the 'beep' file, a '1' bit means
171	disable, not enable. This may be changed in the future.
172
173	Known problems:
174	- Problems with diode/thermistor settings (supported?)
175	- fan_div register may not really be fan_div.
176	- One user reports fans stopping under high server load.
177	- Some as99127f chips are misidentified as a w83781d or w83782d.
178	This is caused by the chip having the wrong WCHIPID register
179	value, so there is no fix. The workaround is to use the
180	force_as99127f parameter.
181	(modprobe w83781d force_as99127f=BUS,0x2d where BUS is your i2c bus number)
182
183	These will not be fixed unless we get a datasheet.
184	If you have problems, please lobby Asus to release a datasheet.
185	Unfortunately several others have without success.
186	Please do not send mail to us asking for better as99127f support.
187	We have done the best we can without a datasheet.
188	Please do not send mail to the author or the sensors group asking for
189	a datasheet or ideas on how to convince Asus. We can't help.
190
191
192	Chip Features
193	-------------
194
195	Chip `w83781d'
196	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
197	in0 NONE NONE R 2
198	in1 NONE NONE R 2
199	in2 NONE NONE R 2
200	in3 NONE NONE R 2
201	in4 NONE NONE R 2
202	in5 NONE NONE R 2
203	in6 NONE NONE R 2
204	in0_min in0 in0 RW 2
205	in1_min in1 in1 RW 2
206	in2_min in2 in2 RW 2
207	in3_min in3 in3 RW 2
208	in4_min in4 in4 RW 2
209	in5_min in5 in5 RW 2
210	in6_min in6 in6 RW 2
211	in0_max in0 in0 RW 2
212	in1_max in1 in1 RW 2
213	in2_max in2 in2 RW 2
214	in3_max in3 in3 RW 2
215	in4_max in4 in4 RW 2
216	in5_max in5 in5 RW 2
217	in6_max in6 in6 RW 2
218	fan1 NONE NONE R 0
219	fan2 NONE NONE R 0
220	fan3 NONE NONE R 0
221	fan1_min fan1 NONE RW 0
222	fan2_min fan2 NONE RW 0
223	fan3_min fan3 NONE RW 0
224	temp1 NONE NONE R 1
225	temp1_hyst temp1 temp1 RW 1
226	temp1_over temp1 temp1 RW 1
227	temp2 NONE NONE R 1
228	temp2_hyst temp2 temp2 RW 1
229	temp2_over temp2 temp2 RW 1
230	temp3 NONE NONE R 1
231	temp3_hyst temp3 temp3 RW 1
232	temp3_over temp3 temp3 RW 1
233	vid NONE NONE R 2
234	fan1_div fan1 NONE RW 0
235	fan2_div fan2 NONE RW 0
236	fan3_div fan3 NONE R 0
237	alarms NONE NONE R 0
238	beep_enable alarms NONE RW 0
239	beeps alarms alarms RW 0
240
241	LABEL FEATURE SYMBOL SYSCTL FILE:NR
242	in0 SENSORS_W83781D_IN0 in0:3
243	in1 SENSORS_W83781D_IN1 in1:3
244	in2 SENSORS_W83781D_IN2 in2:3
245	in3 SENSORS_W83781D_IN3 in3:3
246	in4 SENSORS_W83781D_IN4 in4:3
247	in5 SENSORS_W83781D_IN5 in5:3
248	in6 SENSORS_W83781D_IN6 in6:3
249	in0_min SENSORS_W83781D_IN0_MIN in0:1
250	in1_min SENSORS_W83781D_IN1_MIN in1:1
251	in2_min SENSORS_W83781D_IN2_MIN in2:1
252	in3_min SENSORS_W83781D_IN3_MIN in3:1
253	in4_min SENSORS_W83781D_IN4_MIN in4:1
254	in5_min SENSORS_W83781D_IN5_MIN in5:1
255	in6_min SENSORS_W83781D_IN6_MIN in6:1
256	in0_max SENSORS_W83781D_IN0_MAX in0:2
257	in1_max SENSORS_W83781D_IN1_MAX in1:2
258	in2_max SENSORS_W83781D_IN2_MAX in2:2
259	in3_max SENSORS_W83781D_IN3_MAX in3:2
260	in4_max SENSORS_W83781D_IN4_MAX in4:2
261	in5_max SENSORS_W83781D_IN5_MAX in5:2
262	in6_max SENSORS_W83781D_IN6_MAX in6:2
263	fan1 SENSORS_W83781D_FAN1 fan1:2
264	fan2 SENSORS_W83781D_FAN2 fan2:2
265	fan3 SENSORS_W83781D_FAN3 fan3:2
266	fan1_min SENSORS_W83781D_FAN1_MIN fan1:1
267	fan2_min SENSORS_W83781D_FAN2_MIN fan2:1
268	fan3_min SENSORS_W83781D_FAN3_MIN fan3:1
269	temp1 SENSORS_W83781D_TEMP1 temp1:3
270	temp1_hyst SENSORS_W83781D_TEMP1_HYST temp1:2
271	temp1_over SENSORS_W83781D_TEMP1_OVER temp1:1
272	temp2 SENSORS_W83781D_TEMP2 temp2:3
273	temp2_hyst SENSORS_W83781D_TEMP2_HYST temp2:2
274	temp2_over SENSORS_W83781D_TEMP2_OVER temp2:1
275	temp3 SENSORS_W83781D_TEMP3 temp3:3
276	temp3_hyst SENSORS_W83781D_TEMP3_HYST temp3:2
277	temp3_over SENSORS_W83781D_TEMP3_OVER temp3:1
278	vid SENSORS_W83781D_VID vid:1
279	fan1_div SENSORS_W83781D_FAN1_DIV fan_div:1
280	fan2_div SENSORS_W83781D_FAN2_DIV fan_div:2
281	fan3_div SENSORS_W83781D_FAN3_DIV fan_div:3
282	alarms SENSORS_W83781D_ALARMS alarms:1
283	beep_enable SENSORS_W83781D_BEEP_ENABLE beep:1
284	beeps SENSORS_W83781D_BEEPS beep:2
285
286
287	Chip `w83782d'
288	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
289	in0 NONE NONE R 2
290	in1 NONE NONE R 2
291	in2 NONE NONE R 2
292	in3 NONE NONE R 2
293	in4 NONE NONE R 2
294	in5 NONE NONE R 2
295	in6 NONE NONE R 2
296	in7 NONE NONE R 2
297	in8 NONE NONE R 2
298	in0_min in0 in0 RW 2
299	in1_min in1 in1 RW 2
300	in2_min in2 in2 RW 2
301	in3_min in3 in3 RW 2
302	in4_min in4 in4 RW 2
303	in5_min in5 in5 RW 2
304	in6_min in6 in6 RW 2
305	in7_min in7 in7 RW 2
306	in8_min in8 in8 RW 2
307	in0_max in0 in0 RW 2
308	in1_max in1 in1 RW 2
309	in2_max in2 in2 RW 2
310	in3_max in3 in3 RW 2
311	in4_max in4 in4 RW 2
312	in5_max in5 in5 RW 2
313	in6_max in6 in6 RW 2
314	in7_max in7 in7 RW 2
315	in8_max in8 in8 RW 2
316	fan1 NONE NONE R 0
317	fan2 NONE NONE R 0
318	fan3 NONE NONE R 0
319	fan1_min fan1 NONE RW 0
320	fan2_min fan2 NONE RW 0
321	fan3_min fan3 NONE RW 0
322	temp1 NONE NONE R 1
323	temp1_hyst temp1 temp1 RW 1
324	temp1_over temp1 temp1 RW 1
325	temp2 NONE NONE R 1
326	temp2_hyst temp2 temp2 RW 1
327	temp2_over temp2 temp2 RW 1
328	temp3 NONE NONE R 1
329	temp3_hyst temp3 temp3 RW 1
330	temp3_over temp3 temp3 RW 1
331	vid NONE NONE R 2
332	fan1_div fan1 NONE RW 0
333	fan2_div fan2 NONE RW 0
334	fan3_div fan3 NONE R 0
335	alarms NONE NONE R 0
336	beep_enable alarms NONE RW 0
337	beeps alarms alarms RW 0
338	sensor1 NONE NONE RW 0
339	sensor2 NONE NONE RW 0
340	sensor3 NONE NONE RW 0
341
342	LABEL FEATURE SYMBOL SYSCTL FILE:NR
343	in0 SENSORS_W83782D_IN0 in0:3
344	in1 SENSORS_W83782D_IN1 in1:3
345	in2 SENSORS_W83782D_IN2 in2:3
346	in3 SENSORS_W83782D_IN3 in3:3
347	in4 SENSORS_W83782D_IN4 in4:3
348	in5 SENSORS_W83782D_IN5 in5:3
349	in6 SENSORS_W83782D_IN6 in6:3
350	in7 SENSORS_W83782D_IN7 in7:3
351	in8 SENSORS_W83782D_IN8 in8:3
352	in0_min SENSORS_W83782D_IN0_MIN in0:1
353	in1_min SENSORS_W83782D_IN1_MIN in1:1
354	in2_min SENSORS_W83782D_IN2_MIN in2:1
355	in3_min SENSORS_W83782D_IN3_MIN in3:1
356	in4_min SENSORS_W83782D_IN4_MIN in4:1
357	in5_min SENSORS_W83782D_IN5_MIN in5:1
358	in6_min SENSORS_W83782D_IN6_MIN in6:1
359	in7_min SENSORS_W83782D_IN7_MIN in7:1
360	in8_min SENSORS_W83782D_IN8_MIN in8:1
361	in0_max SENSORS_W83782D_IN0_MAX in0:2
362	in1_max SENSORS_W83782D_IN1_MAX in1:2
363	in2_max SENSORS_W83782D_IN2_MAX in2:2
364	in3_max SENSORS_W83782D_IN3_MAX in3:2
365	in4_max SENSORS_W83782D_IN4_MAX in4:2
366	in5_max SENSORS_W83782D_IN5_MAX in5:2
367	in6_max SENSORS_W83782D_IN6_MAX in6:2
368	in7_max SENSORS_W83782D_IN7_MAX in7:2
369	in8_max SENSORS_W83782D_IN8_MAX in8:2
370	fan1 SENSORS_W83782D_FAN1 fan1:2
371	fan2 SENSORS_W83782D_FAN2 fan2:2
372	fan3 SENSORS_W83781D_FAN3 fan3:2
373	fan1_min SENSORS_W83782D_FAN1_MIN fan1:1
374	fan2_min SENSORS_W83782D_FAN2_MIN fan2:1
375	fan3_min SENSORS_W83781D_FAN3_MIN fan3:1
376	temp1 SENSORS_W83782D_TEMP1 temp1:3
377	temp1_hyst SENSORS_W83782D_TEMP1_HYST temp1:2
378	temp1_over SENSORS_W83782D_TEMP1_OVER temp1:1
379	temp2 SENSORS_W83782D_TEMP2 temp2:3
380	temp2_hyst SENSORS_W83782D_TEMP2_HYST temp2:2
381	temp2_over SENSORS_W83782D_TEMP2_OVER temp2:1
382	temp3 SENSORS_W83782D_TEMP3 temp3:3
383	temp3_hyst SENSORS_W83782D_TEMP3_HYST temp3:2
384	temp3_over SENSORS_W83782D_TEMP3_OVER temp3:1
385	vid SENSORS_W83782D_VID vid:1
386	fan1_div SENSORS_W83782D_FAN1_DIV fan_div:1
387	fan2_div SENSORS_W83782D_FAN2_DIV fan_div:2
388	fan3_div SENSORS_W83781D_FAN3_DIV fan_div:3
389	alarms SENSORS_W83782D_ALARMS alarms:1
390	beep_enable SENSORS_W83782D_BEEP_ENABLE beep:1
391	beeps SENSORS_W83782D_BEEPS beep:2
392	sensor1 SENSORS_W83782D_SENS1 sensor1:1
393	sensor2 SENSORS_W83782D_SENS2 sensor2:1
394	sensor3 SENSORS_W83782D_SENS3 sensor3:1
395
396
397	Chip `w83783s'
398	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
399	in0 NONE NONE R 2
400	in1 NONE NONE R 2
401	in2 NONE NONE R 2
402	in3 NONE NONE R 2
403	in4 NONE NONE R 2
404	in5 NONE NONE R 2
405	in6 NONE NONE R 2
406	in0_min in0 in0 RW 2
407	in1_min in1 in1 RW 2
408	in2_min in2 in2 RW 2
409	in3_min in3 in3 RW 2
410	in4_min in4 in4 RW 2
411	in5_min in5 in5 RW 2
412	in6_min in6 in6 RW 2
413	in0_max in0 in0 RW 2
414	in1_max in1 in1 RW 2
415	in2_max in2 in2 RW 2
416	in3_max in3 in3 RW 2
417	in4_max in4 in4 RW 2
418	in5_max in5 in5 RW 2
419	in6_max in6 in6 RW 2
420	fan1 NONE NONE R 0
421	fan2 NONE NONE R 0
422	fan3 NONE NONE R 0
423	fan1_min fan1 NONE RW 0
424	fan2_min fan2 NONE RW 0
425	fan3_min fan3 NONE RW 0
426	temp1 NONE NONE R 1
427	temp1_hyst temp1 temp1 RW 1
428	temp1_over temp1 temp1 RW 1
429	temp2 NONE NONE R 1
430	temp2_hyst temp2 temp2 RW 1
431	temp2_over temp2 temp2 RW 1
432	vid NONE NONE R 2
433	fan1_div fan1 NONE RW 0
434	fan2_div fan2 NONE RW 0
435	fan3_div fan3 NONE R 0
436	alarms NONE NONE R 0
437	beep_enable alarms NONE RW 0
438	beeps alarms alarms RW 0
439	sensor1 NONE NONE RW 0
440	sensor2 NONE NONE RW 0
441
442	LABEL FEATURE SYMBOL SYSCTL FILE:NR
443	in0 SENSORS_W83783S_IN0 in0:3
444	in1 SENSORS_W83783S_IN1 in1:3
445	in2 SENSORS_W83783S_IN2 in2:3
446	in3 SENSORS_W83783S_IN3 in3:3
447	in4 SENSORS_W83783S_IN4 in4:3
448	in5 SENSORS_W83783S_IN5 in5:3
449	in6 SENSORS_W83783S_IN6 in6:3
450	in0_min SENSORS_W83783S_IN0_MIN in0:1
451	in1_min SENSORS_W83783S_IN1_MIN in1:1
452	in2_min SENSORS_W83783S_IN2_MIN in2:1
453	in3_min SENSORS_W83783S_IN3_MIN in3:1
454	in4_min SENSORS_W83783S_IN4_MIN in4:1
455	in5_min SENSORS_W83783S_IN5_MIN in5:1
456	in6_min SENSORS_W83783S_IN6_MIN in6:1
457	in0_max SENSORS_W83783S_IN0_MAX in0:2
458	in1_max SENSORS_W83783S_IN1_MAX in1:2
459	in2_max SENSORS_W83783S_IN2_MAX in2:2
460	in3_max SENSORS_W83783S_IN3_MAX in3:2
461	in4_max SENSORS_W83783S_IN4_MAX in4:2
462	in5_max SENSORS_W83783S_IN5_MAX in5:2
463	in6_max SENSORS_W83783S_IN6_MAX in6:2
464	fan1 SENSORS_W83783S_FAN1 fan1:2
465	fan2 SENSORS_W83783S_FAN2 fan2:2
466	fan3 SENSORS_W83783S_FAN3 fan3:2
467	fan1_min SENSORS_W83783S_FAN1_MIN fan1:1
468	fan2_min SENSORS_W83783S_FAN2_MIN fan2:1
469	fan3_min SENSORS_W83783S_FAN3_MIN fan3:1
470	temp1 SENSORS_W83783S_TEMP1 temp1:3
471	temp1_hyst SENSORS_W83783S_TEMP1_HYST temp1:2
472	temp1_over SENSORS_W83783S_TEMP1_OVER temp1:1
473	temp2 SENSORS_W83783S_TEMP2 temp2:3
474	temp2_hyst SENSORS_W83783S_TEMP2_HYST temp2:2
475	temp2_over SENSORS_W83783S_TEMP2_OVER temp2:1
476	vid SENSORS_W83783S_VID vid:1
477	fan1_div SENSORS_W83783S_FAN1_DIV fan_div:1
478	fan2_div SENSORS_W83783S_FAN2_DIV fan_div:2
479	fan3_div SENSORS_W83783S_FAN3_DIV fan_div:3
480	alarms SENSORS_W83783S_ALARMS alarms:1
481	beep_enable SENSORS_W83783S_BEEP_ENABLE beep:1
482	beeps SENSORS_W83783S_BEEPS beep:2
483	sensor1 SENSORS_W83783S_SENS1 sensor1:1
484	sensor2 SENSORS_W83783S_SENS2 sensor2:1
485
486
487
488	Miscellaneous documentation
489	===========================
490
491
492
493	/PROC ENTRIES
494	-------------
495	Varies depending on chip type. Most are identical to the lm78 entries.
496	See the lm78 documentation for details.
497
498	Additional entries not in the lm78:
499
500	pwm[1-4]: (782d/783s only)
501	Controls the speed of the fans with PWM (Pulse Width Modulation)
502	Valid values:
503	0 - 255. 255 = max speed.
504
505	sensor[1-3]: (782d/783s only)
506	Controls the sensor type. To change to a different
507	sensor type, for example, do 'echo 2 > sensor1'.
508	Valid values:
509	1: Pentium II / Celeron diode
510	2: 2N3904 Transistor in a diode configuration
511	3435: Thermistor with Beta = 3435. Beta is a measure
512	of sensitivity to temperature.
513	Thermistors with other Betas could in theory be supported
514	after correspondence with Winbond. See below.
515
516	rt[1-3]: (781d only)
517	32-byte tables controlling the conversion from
518	resistance to temperature for thermistors.
519	For the curious only. Writing to these entries will
520	probably render temperature sensing insane.
521	Only set at initialization; not updated every 1.5 seconds.
522
523
524
525	TO DO:
526	-----
527	782d programmable pins
528
529
530	NOTES:
531	-----
532	783s has no in1 so that in[2-6] are compatible with the 781d/782d.
533
534	783s pin is programmable for -5V or temp1; defaults to -5V,
535	no control in driver so temp1 doesn't work.
536
537	782d and 783s datasheets differ on which is pwm1 and which is pwm2.
538	We chose to follow 782d.
539
540	782d and 783s pin is programmable for fan3 input or pwm2 output;
541	defaults to fan3 input.
542	no control in driver so pwm2 doesn't work.
543
544	782d has pwm1-2 for isa, pwm1-4 for i2c. (pwm3-4 share pins with
545	the isa pins)
546
547	781d allowable values for fan_div are 1,2,4,8.
548	782d/783s allowable values for fan_div are 1,2,4,8,16,32,64,128.
549
550
551
552	Data sheet updates:
553	------------------
554	- Mask off lower bit of all ID registers.
555
556	- PWM clock registers:
557
558	000: master / 512
559	001: master / 1024
560	010: master / 2048
561	011: master / 4096
562	100: master / 8192
563
564
565	Answers from Winbond tech support
566	---------------------------------
567	>
568	> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
569	> reprogramming the R-T table if the Beta of the thermistor is not
570	> 3435K. The R-T table is described briefly in section 8.20.
571	> What formulas do I use to program a new R-T table for a given Beta?
572	>
573	We are sorry that the calculation for R-T table value is
574	confidential. If you have another Beta value of thermistor, we can help
575	to calculate the R-T table for you. But you should give us real R-T
576	Table which can be gotten by thermistor vendor. Therefore we will calculate
577	them and obtain 32-byte data, and you can fill the 32-byte data to the
578	register in Bank0.CR51 of W83781D.
579
580
581	> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
582	> programmable to be either thermistor or Pentium II diode inputs.
583	> How do I program them for diode inputs? I can't find any register
584	> to program these to be diode inputs.
585	--> You may program Bank0 CR[5Dh] and CR[59h] registers.
586
587	CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
588
589	thermistor 0 0 0
590	diode 1 1 1
591
592
593	(error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
594	(right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
595
596	PII thermal diode 1 1 1
597	2N3904 diode 0 0 0
598
599
600	Author/Maintainer
601	-----------------
602	Original 781D support: Frodo and Phil (sensors@stimpy.netroedge.com)
603	782D/783S support added by: Mark D. Studebaker (mdsxyz123@yahoo.com)
604	Send requests to the sensors@stimpy.netroedge.com mailing list.

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