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w83781d @ 797

Revision 797, 31.2 KB (checked in by mds, 13 years ago)
(mds) w83627hf only has 2 pwm whether on ISA or I2C bus.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`

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

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