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w83781d @ 738

Revision 738, 31.3 KB (checked in by frodo, 13 years ago)
Changed email address lm78@... to sensors@...
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Line
1	Kernel driver `w83781d.o'
2	=========================
3
4	Status: W83781D support is complete and well-tested, others are mostly complete
5	and somewhat tested.
6
7	Supported chips:
8	* Winbond W83781D
9	Prefix 'w83781d'
10	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
11	Datasheet: Publicly available at the Winbond website
12	* Winbond W83782D
13	Prefix 'w83782d'
14	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
15	Datasheet: Publicly available at the Winbond website
16	* Winbond W83783S
17	Prefix 'w83783s'
18	Addresses scanned: I2C 0x20 - 0x2f (inclusive)
19	Datasheet: Publicly available at the Winbond website
20	* Winbond W83627HF
21	Prefix 'w83627hf'
22	Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports)
23	Datasheet: Unavailable from Winbond
24	* Asus AS99127F
25	Prefix 'as99127f'
26	Addresses scanned: I2C 0x20 - 0x2f (inclusive)
27	Datasheet: Unavailable from Asus
28
29
30	Author: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>,
31	and Mark Studebaker <mdsxyz123@yahoo.com>
32
33
34	Module Parameters
35	-----------------
36
37	* force: short array (min = 1, max = 48)
38	List of adapter,address pairs to boldly assume to be present
39	* force_w83781d: short array (min = 1, max = 48)
40	List of adapter,address pairs which are unquestionably assumed to contain
41	a `w83781d' chip
42	* force_w83782d: short array (min = 1, max = 48)
43	List of adapter,address pairs which are unquestionably assumed to contain
44	a `w83782d' chip
45	* force_w83783s: short array (min = 1, max = 48)
46	List of adapter,address pairs which are unquestionably assumed to contain
47	a `w83783s' chip
48	* ignore: short array (min = 1, max = 48)
49	List of adapter,address pairs not to scan
50	* ignore_range: short array (min = 1, max = 48)
51	List of adapter,start-addr,end-addr triples not to scan
52	* probe: short array (min = 1, max = 48)
53	List of adapter,address pairs to scan additionally
54	* probe_range: short array (min = 1, max = 48)
55	List of adapter,start-addr,end-addr triples to scan additionally
56
57
58	Description
59	-----------
60
61	This driver implements support for the Winbond W83781D, W83782D,
62	W8783S, and W83627HF chips, and the Asus AS99127F.
63	We will refer to them collectively as W8378* chips.
64
65	There is quite some difference between these chips, but they are similar
66	enough that it was sensible to put them together in one driver.
67	The W83627HF chip is assumed to be identical to the W83782D.
68	The AS99127F chip is assumed to be identical to an I2C-only W83782D.
69
70	Detection of these chips can sometimes be foiled because they can be in
71	an internal state that allows no clean access. If you know the address
72	of the chip, use a 'force' parameter; this will put them into a more
73	well-behaved state first.
74
75	The W8378* implements temperature sensors (three on the W83781D and W83782D,
76	two on the W83783S), three FAN rotation speed sensors, voltage sensors
77	(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
78	lines, alarms with beep warnings, and some miscellaneous stuff.
79
80	Temperatures are measured in degrees Celcius. There is always one main
81	temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
82	sensors. An alarm is triggered for the main sensor once when the
83	Overtemperature Shutdown limit is crossed; it is triggered again as soon as
84	it drops below the Hysteresis value. A more useful behaviour
85	can be found by setting the Hysteresis value to +127 degrees Celcius; in
86	this case, alarms are issued during all the time when the actual temperature
87	is above the Overtemperature Shutdown value. For the other sensor(s), an
88	alarm is triggered when the temperature gets higher then the Overtemperature
89	Shutdown value; it stays on until the temperature falls below the Hysteresis
90	value. But on the W83781D, there is only one alarm that functions for both
91	other sensors! Temperatures are guaranteed within a range of -55 to +125
92	degrees. The main temperature sensors has a resolution of 1 degree; the other
93	sensor(s) of 0.5 degree.
94
95	FAN rotation speeds are reported in RPM (rotations per minute). An alarm is
96	triggered if the rotation speed has dropped below a programmable limit. FAN
97	readings can be divided by a programmable divider (1, 2, 4 or 8 for the
98	W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the W83782D and W83783S) to give
99	the readings more range or accuracy. This is important because some FANs
100	report only one 'tick' each rotation, while others report two - making
101	all readings twice as high. Not all RPM values can accurately be represented,
102	so some rounding is done. With a divider of 2, the lowest representable
103	value is around 2600 RPM.
104
105	Voltage sensors (also known as IN sensors) report their values in volts.
106	An alarm is triggered if the voltage has crossed a programmable minimum
107	or maximum limit. Note that minimum in this case always means 'closest to
108	zero'; this is important for negative voltage measurements. All voltage
109	inputs can measure voltages between 0 and 4.08 volts, with a resolution
110	of 0.016 volt.
111
112	The VID lines encode the core voltage value: the voltage level your processor
113	should work with. This is hardcoded by the mainboard and/or processor itself.
114	It is a value in volts. When it is unconnected, you will often find the
115	value 3.50 V here.
116
117	The W83782D and W83783S temperature conversion machine understands about
118	several kinds of temperature probes. You can program the so-called
119	beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
120	TN3904 transistor, and 3435 the default thermistor value. Other values
121	are (not yet) supported. You can program your own values through the
122	rt interface, but this is not very useful, because these tables are
123	under NDA.
124
125	In addition to the alarms described above, there is a CHAS alarm on the
126	W83781D and W83782D which triggers if your computer case is open.
127
128	When an alarm goes off, you can be warned by a beeping signal through
129	your computer speaker. It is possible to enable all beeping globally,
130	or only the beeping for some alarms.
131
132	If an alarm triggers, it will remain triggered until the hardware register
133	is read at least once. This means that the cause for the alarm may
134	already have disappeared! Note that in the current implementation, all
135	hardware registers are read whenever any data is read (unless it is less
136	than 1.5 seconds since the last update). This means that you can easily
137	miss once-only alarms.
138
139	The W8378* only updates its values each 1.5 seconds; reading it more often
140	will do no harm, but will return 'old' values.
141
142
143	AS99127F PROBLEMS
144	-----------------
145	The as99127f support was developed without the benefit of a datasheet.
146	In most cases it is treated as a w83782d.
147	Known problems:
148	- Fans read about 30% low.
149	- -12V readings a little high (-9.5V to -10.5V)
150	- Problems with diode/thermistor settings (supported?)
151
152	These will not be fixed unless we get a datasheet.
153
154
155	Chip Features
156	-------------
157
158	Chip `w83781d'
159	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
160	in0 NONE NONE R 2
161	in1 NONE NONE R 2
162	in2 NONE NONE R 2
163	in3 NONE NONE R 2
164	in4 NONE NONE R 2
165	in5 NONE NONE R 2
166	in6 NONE NONE R 2
167	in0_min in0 in0 RW 2
168	in1_min in1 in1 RW 2
169	in2_min in2 in2 RW 2
170	in3_min in3 in3 RW 2
171	in4_min in4 in4 RW 2
172	in5_min in5 in5 RW 2
173	in6_min in6 in6 RW 2
174	in0_max in0 in0 RW 2
175	in1_max in1 in1 RW 2
176	in2_max in2 in2 RW 2
177	in3_max in3 in3 RW 2
178	in4_max in4 in4 RW 2
179	in5_max in5 in5 RW 2
180	in6_max in6 in6 RW 2
181	fan1 NONE NONE R 0
182	fan2 NONE NONE R 0
183	fan3 NONE NONE R 0
184	fan1_min fan1 NONE RW 0
185	fan2_min fan2 NONE RW 0
186	fan3_min fan3 NONE RW 0
187	temp1 NONE NONE R 1
188	temp1_hyst temp1 temp1 RW 1
189	temp1_over temp1 temp1 RW 1
190	temp2 NONE NONE R 1
191	temp2_hyst temp2 temp2 RW 1
192	temp2_over temp2 temp2 RW 1
193	temp3 NONE NONE R 1
194	temp3_hyst temp3 temp3 RW 1
195	temp3_over temp3 temp3 RW 1
196	vid NONE NONE R 2
197	fan1_div fan1 NONE RW 0
198	fan2_div fan2 NONE RW 0
199	fan3_div fan3 NONE R 0
200	alarms NONE NONE R 0
201	beep_enable alarms NONE RW 0
202	beeps alarms alarms RW 0
203
204	LABEL FEATURE SYMBOL SYSCTL FILE:NR
205	in0 SENSORS_W83781D_IN0 in0:3
206	in1 SENSORS_W83781D_IN1 in1:3
207	in2 SENSORS_W83781D_IN2 in2:3
208	in3 SENSORS_W83781D_IN3 in3:3
209	in4 SENSORS_W83781D_IN4 in4:3
210	in5 SENSORS_W83781D_IN5 in5:3
211	in6 SENSORS_W83781D_IN6 in6:3
212	in0_min SENSORS_W83781D_IN0_MIN in0:1
213	in1_min SENSORS_W83781D_IN1_MIN in1:1
214	in2_min SENSORS_W83781D_IN2_MIN in2:1
215	in3_min SENSORS_W83781D_IN3_MIN in3:1
216	in4_min SENSORS_W83781D_IN4_MIN in4:1
217	in5_min SENSORS_W83781D_IN5_MIN in5:1
218	in6_min SENSORS_W83781D_IN6_MIN in6:1
219	in0_max SENSORS_W83781D_IN0_MAX in0:2
220	in1_max SENSORS_W83781D_IN1_MAX in1:2
221	in2_max SENSORS_W83781D_IN2_MAX in2:2
222	in3_max SENSORS_W83781D_IN3_MAX in3:2
223	in4_max SENSORS_W83781D_IN4_MAX in4:2
224	in5_max SENSORS_W83781D_IN5_MAX in5:2
225	in6_max SENSORS_W83781D_IN6_MAX in6:2
226	fan1 SENSORS_W83781D_FAN1 fan1:2
227	fan2 SENSORS_W83781D_FAN2 fan2:2
228	fan3 SENSORS_W83781D_FAN3 fan3:2
229	fan1_min SENSORS_W83781D_FAN1_MIN fan1:1
230	fan2_min SENSORS_W83781D_FAN2_MIN fan2:1
231	fan3_min SENSORS_W83781D_FAN3_MIN fan3:1
232	temp1 SENSORS_W83781D_TEMP1 temp1:3
233	temp1_hyst SENSORS_W83781D_TEMP1_HYST temp1:2
234	temp1_over SENSORS_W83781D_TEMP1_OVER temp1:1
235	temp2 SENSORS_W83781D_TEMP2 temp2:3
236	temp2_hyst SENSORS_W83781D_TEMP2_HYST temp2:2
237	temp2_over SENSORS_W83781D_TEMP2_OVER temp2:1
238	temp3 SENSORS_W83781D_TEMP3 temp3:3
239	temp3_hyst SENSORS_W83781D_TEMP3_HYST temp3:2
240	temp3_over SENSORS_W83781D_TEMP3_OVER temp3:1
241	vid SENSORS_W83781D_VID vid:1
242	fan1_div SENSORS_W83781D_FAN1_DIV fan_div:1
243	fan2_div SENSORS_W83781D_FAN2_DIV fan_div:2
244	fan3_div SENSORS_W83781D_FAN3_DIV fan_div:3
245	alarms SENSORS_W83781D_ALARMS alarms:1
246	beep_enable SENSORS_W83781D_BEEP_ENABLE beep:1
247	beeps SENSORS_W83781D_BEEPS beep:2
248
249
250	Chip `w83782d'
251	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
252	in0 NONE NONE R 2
253	in1 NONE NONE R 2
254	in2 NONE NONE R 2
255	in3 NONE NONE R 2
256	in4 NONE NONE R 2
257	in5 NONE NONE R 2
258	in6 NONE NONE R 2
259	in7 NONE NONE R 2
260	in8 NONE NONE R 2
261	in0_min in0 in0 RW 2
262	in1_min in1 in1 RW 2
263	in2_min in2 in2 RW 2
264	in3_min in3 in3 RW 2
265	in4_min in4 in4 RW 2
266	in5_min in5 in5 RW 2
267	in6_min in6 in6 RW 2
268	in7_min in7 in7 RW 2
269	in8_min in8 in8 RW 2
270	in0_max in0 in0 RW 2
271	in1_max in1 in1 RW 2
272	in2_max in2 in2 RW 2
273	in3_max in3 in3 RW 2
274	in4_max in4 in4 RW 2
275	in5_max in5 in5 RW 2
276	in6_max in6 in6 RW 2
277	in7_max in7 in7 RW 2
278	in8_max in8 in8 RW 2
279	fan1 NONE NONE R 0
280	fan2 NONE NONE R 0
281	fan3 NONE NONE R 0
282	fan1_min fan1 NONE RW 0
283	fan2_min fan2 NONE RW 0
284	fan3_min fan3 NONE RW 0
285	temp1 NONE NONE R 1
286	temp1_hyst temp1 temp1 RW 1
287	temp1_over temp1 temp1 RW 1
288	temp2 NONE NONE R 1
289	temp2_hyst temp2 temp2 RW 1
290	temp2_over temp2 temp2 RW 1
291	temp3 NONE NONE R 1
292	temp3_hyst temp3 temp3 RW 1
293	temp3_over temp3 temp3 RW 1
294	vid NONE NONE R 2
295	fan1_div fan1 NONE RW 0
296	fan2_div fan2 NONE RW 0
297	fan3_div fan3 NONE R 0
298	alarms NONE NONE R 0
299	beep_enable alarms NONE RW 0
300	beeps alarms alarms RW 0
301	sensor1 NONE NONE RW 0
302	sensor2 NONE NONE RW 0
303	sensor3 NONE NONE RW 0
304
305	LABEL FEATURE SYMBOL SYSCTL FILE:NR
306	in0 SENSORS_W83782D_IN0 in0:3
307	in1 SENSORS_W83782D_IN1 in1:3
308	in2 SENSORS_W83782D_IN2 in2:3
309	in3 SENSORS_W83782D_IN3 in3:3
310	in4 SENSORS_W83782D_IN4 in4:3
311	in5 SENSORS_W83782D_IN5 in5:3
312	in6 SENSORS_W83782D_IN6 in6:3
313	in7 SENSORS_W83782D_IN7 in7:3
314	in8 SENSORS_W83782D_IN8 in8:3
315	in0_min SENSORS_W83782D_IN0_MIN in0:1
316	in1_min SENSORS_W83782D_IN1_MIN in1:1
317	in2_min SENSORS_W83782D_IN2_MIN in2:1
318	in3_min SENSORS_W83782D_IN3_MIN in3:1
319	in4_min SENSORS_W83782D_IN4_MIN in4:1
320	in5_min SENSORS_W83782D_IN5_MIN in5:1
321	in6_min SENSORS_W83782D_IN6_MIN in6:1
322	in7_min SENSORS_W83782D_IN7_MIN in7:1
323	in8_min SENSORS_W83782D_IN8_MIN in8:1
324	in0_max SENSORS_W83782D_IN0_MAX in0:2
325	in1_max SENSORS_W83782D_IN1_MAX in1:2
326	in2_max SENSORS_W83782D_IN2_MAX in2:2
327	in3_max SENSORS_W83782D_IN3_MAX in3:2
328	in4_max SENSORS_W83782D_IN4_MAX in4:2
329	in5_max SENSORS_W83782D_IN5_MAX in5:2
330	in6_max SENSORS_W83782D_IN6_MAX in6:2
331	in7_max SENSORS_W83782D_IN7_MAX in7:2
332	in8_max SENSORS_W83782D_IN8_MAX in8:2
333	fan1 SENSORS_W83782D_FAN1 fan1:2
334	fan2 SENSORS_W83782D_FAN2 fan2:2
335	fan3 SENSORS_W83781D_FAN3 fan3:2
336	fan1_min SENSORS_W83782D_FAN1_MIN fan1:1
337	fan2_min SENSORS_W83782D_FAN2_MIN fan2:1
338	fan3_min SENSORS_W83781D_FAN3_MIN fan3:1
339	temp1 SENSORS_W83782D_TEMP1 temp1:3
340	temp1_hyst SENSORS_W83782D_TEMP1_HYST temp1:2
341	temp1_over SENSORS_W83782D_TEMP1_OVER temp1:1
342	temp2 SENSORS_W83782D_TEMP2 temp2:3
343	temp2_hyst SENSORS_W83782D_TEMP2_HYST temp2:2
344	temp2_over SENSORS_W83782D_TEMP2_OVER temp2:1
345	temp3 SENSORS_W83782D_TEMP3 temp3:3
346	temp3_hyst SENSORS_W83782D_TEMP3_HYST temp3:2
347	temp3_over SENSORS_W83782D_TEMP3_OVER temp3:1
348	vid SENSORS_W83782D_VID vid:1
349	fan1_div SENSORS_W83782D_FAN1_DIV fan_div:1
350	fan2_div SENSORS_W83782D_FAN2_DIV fan_div:2
351	fan3_div SENSORS_W83781D_FAN3_DIV fan_div:3
352	alarms SENSORS_W83782D_ALARMS alarms:1
353	beep_enable SENSORS_W83782D_BEEP_ENABLE beep:1
354	beeps SENSORS_W83782D_BEEPS beep:2
355	sensor1 SENSORS_W83782D_SENS1 sensor1:1
356	sensor2 SENSORS_W83782D_SENS2 sensor2:1
357	sensor3 SENSORS_W83782D_SENS3 sensor3:1
358
359
360	Chip `w83783s'
361	LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
362	in0 NONE NONE R 2
363	in1 NONE NONE R 2
364	in2 NONE NONE R 2
365	in3 NONE NONE R 2
366	in4 NONE NONE R 2
367	in5 NONE NONE R 2
368	in6 NONE NONE R 2
369	in0_min in0 in0 RW 2
370	in1_min in1 in1 RW 2
371	in2_min in2 in2 RW 2
372	in3_min in3 in3 RW 2
373	in4_min in4 in4 RW 2
374	in5_min in5 in5 RW 2
375	in6_min in6 in6 RW 2
376	in0_max in0 in0 RW 2
377	in1_max in1 in1 RW 2
378	in2_max in2 in2 RW 2
379	in3_max in3 in3 RW 2
380	in4_max in4 in4 RW 2
381	in5_max in5 in5 RW 2
382	in6_max in6 in6 RW 2
383	fan1 NONE NONE R 0
384	fan2 NONE NONE R 0
385	fan3 NONE NONE R 0
386	fan1_min fan1 NONE RW 0
387	fan2_min fan2 NONE RW 0
388	fan3_min fan3 NONE RW 0
389	temp1 NONE NONE R 1
390	temp1_hyst temp1 temp1 RW 1
391	temp1_over temp1 temp1 RW 1
392	temp2 NONE NONE R 1
393	temp2_hyst temp2 temp2 RW 1
394	temp2_over temp2 temp2 RW 1
395	vid NONE NONE R 2
396	fan1_div fan1 NONE RW 0
397	fan2_div fan2 NONE RW 0
398	fan3_div fan3 NONE R 0
399	alarms NONE NONE R 0
400	beep_enable alarms NONE RW 0
401	beeps alarms alarms RW 0
402	sensor1 NONE NONE RW 0
403	sensor2 NONE NONE RW 0
404
405	LABEL FEATURE SYMBOL SYSCTL FILE:NR
406	in0 SENSORS_W83783S_IN0 in0:3
407	in1 SENSORS_W83783S_IN1 in1:3
408	in2 SENSORS_W83783S_IN2 in2:3
409	in3 SENSORS_W83783S_IN3 in3:3
410	in4 SENSORS_W83783S_IN4 in4:3
411	in5 SENSORS_W83783S_IN5 in5:3
412	in6 SENSORS_W83783S_IN6 in6:3
413	in0_min SENSORS_W83783S_IN0_MIN in0:1
414	in1_min SENSORS_W83783S_IN1_MIN in1:1
415	in2_min SENSORS_W83783S_IN2_MIN in2:1
416	in3_min SENSORS_W83783S_IN3_MIN in3:1
417	in4_min SENSORS_W83783S_IN4_MIN in4:1
418	in5_min SENSORS_W83783S_IN5_MIN in5:1
419	in6_min SENSORS_W83783S_IN6_MIN in6:1
420	in0_max SENSORS_W83783S_IN0_MAX in0:2
421	in1_max SENSORS_W83783S_IN1_MAX in1:2
422	in2_max SENSORS_W83783S_IN2_MAX in2:2
423	in3_max SENSORS_W83783S_IN3_MAX in3:2
424	in4_max SENSORS_W83783S_IN4_MAX in4:2
425	in5_max SENSORS_W83783S_IN5_MAX in5:2
426	in6_max SENSORS_W83783S_IN6_MAX in6:2
427	fan1 SENSORS_W83783S_FAN1 fan1:2
428	fan2 SENSORS_W83783S_FAN2 fan2:2
429	fan3 SENSORS_W83783S_FAN3 fan3:2
430	fan1_min SENSORS_W83783S_FAN1_MIN fan1:1
431	fan2_min SENSORS_W83783S_FAN2_MIN fan2:1
432	fan3_min SENSORS_W83783S_FAN3_MIN fan3:1
433	temp1 SENSORS_W83783S_TEMP1 temp1:3
434	temp1_hyst SENSORS_W83783S_TEMP1_HYST temp1:2
435	temp1_over SENSORS_W83783S_TEMP1_OVER temp1:1
436	temp2 SENSORS_W83783S_TEMP2 temp2:3
437	temp2_hyst SENSORS_W83783S_TEMP2_HYST temp2:2
438	temp2_over SENSORS_W83783S_TEMP2_OVER temp2:1
439	vid SENSORS_W83783S_VID vid:1
440	fan1_div SENSORS_W83783S_FAN1_DIV fan_div:1
441	fan2_div SENSORS_W83783S_FAN2_DIV fan_div:2
442	fan3_div SENSORS_W83783S_FAN3_DIV fan_div:3
443	alarms SENSORS_W83783S_ALARMS alarms:1
444	beep_enable SENSORS_W83783S_BEEP_ENABLE beep:1
445	beeps SENSORS_W83783S_BEEPS beep:2
446	sensor1 SENSORS_W83783S_SENS1 sensor1:1
447	sensor2 SENSORS_W83783S_SENS2 sensor2:1
448
449
450
451	Old documentation
452	-----------------
453
454
455	Winbond 83781D driver
456	---------------------
457	Supports the following Winbond chips:
458
459	Chip #vin #fanin #pwm #temp wchipid i2c ISA
460	------------------------------------------------------------
461	w83781d 7 3 0 3 0x10 yes yes
462	w83782d 9 3 2-4 3 0x30 yes yes
463	w83783s 5-6 3 2 1-2 0x40 yes no
464
465
466	Stability
467	---------
468	w83781d: tested, stable
469	w83782d: beta tested, some minor bugs and things to do.
470	w83783s: untested
471
472
473	/PROC ENTRIES
474	-------------
475	Varies depending on chip type. Most are identical to the lm78 entries.
476	See the lm78 documentation for details.
477
478	Additional entries not in the lm78:
479
480	pwm[1-4]: (782d/783s only)
481	Controls the speed of the fans with PWM (Pulse Width Modulation)
482	Valid values:
483	0 - 255. 255 = max speed.
484
485	sensor[1-3]: (782d/783s only)
486	Controls the sensor type. To change to a different
487	sensor type, for example, do 'echo 2 > sensor1'.
488	Valid values:
489	1: Pentium II / Celeron diode
490	2: 2N3904 Transistor in a diode configuration
491	3435: Thermistor with Beta = 3435. Beta is a measure
492	of sensitivity to temperature.
493	Thermistors with other Betas could in theory be supported
494	after correspondence with Winbond. See below.
495
496	rt[1-3]: (781d only)
497	32-byte tables controlling the conversion from
498	resistance to temperature for thermistors.
499	For the curious only. Writing to these entries will
500	probably render temperature sensing insane.
501	Only set at initialization; not updated every 1.5 seconds.
502
503
504	The driver only updates its values each 1.5 seconds; reading it more often
505	will do no harm, but will return 'old' values.
506
507
508	TO DO:
509	-----
510	782d programmable pins
511	783s temp2 (labeled as temp1 in data sheet) at different location
512	than 781d/782d, not implemented yet.
513
514
515	NOTES:
516	-----
517	783s has no in1 so that in[2-6] are compatible with the 781d/782d.
518
519	783s pin is programmable for -5V or temp1; defaults to -5V,
520	no control in driver so temp1 doesn't work.
521
522	782d and 783s datasheets differ on which is pwm1 and which is pwm2.
523	We chose to follow 782d.
524
525	782d and 783s pin is programmable for fan3 input or pwm2 output;
526	defaults to fan3 input.
527	no control in driver so pwm2 doesn't work.
528
529	782d has pwm1-2 for isa, pwm1-4 for i2c. (pwm3-4 share pins with
530	the isa pins)
531
532	781d allowable values for fan_div are 1,2,4,8.
533	782d/783s allowable values for fan_div are 1,2,4,8,16,32,64,128.
534
535
536
537	Data sheet updates:
538	------------------
539	- Mask off lower bit of all ID registers.
540
541	- PWM clock registers:
542
543	000: master / 512
544	001: master / 1024
545	010: master / 2048
546	011: master / 4096
547	100: master / 8192
548
549
550	Answers from Winbond tech support
551	---------------------------------
552	>
553	> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
554	> reprogramming the R-T table if the Beta of the thermistor is not
555	> 3435K. The R-T table is described briefly in section 8.20.
556	> What formulas do I use to program a new R-T table for a given Beta?
557	>
558	We are sorry that the calculation for R-T table value is
559	confidential. If you have another Beta value of thermistor, we can help
560	to calculate the R-T table for you. But you should give us real R-T
561	Table which can be gotten by thermistor vendor. Therefore we will calculate
562	them and obtain 32-byte data, and you can fill the 32-byte data to the
563	register in Bank0.CR51 of W83781D.
564
565
566	> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
567	> programmable to be either thermistor or Pentium II diode inputs.
568	> How do I program them for diode inputs? I can't find any register
569	> to program these to be diode inputs.
570	--> You may program Bank0 CR[5Dh] and CR[59h] registers.
571
572	CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
573
574	thermistor 0 0 0
575	diode 1 1 1
576
577
578	CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
579
580	PII thermal diode 1 1 1
581	2N3904 diode 0 0 0
582
583
584	Author/Maintainer
585	-----------------
586	Original 781D support: Frodo and Phil (sensors@stimpy.netroedge.com)
587	782D/783S support added by: Mark D. Studebaker (mdsxyz123@yahoo.com)
588	Send requests to the sensors@stimpy.netroedge.com mailing list.

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