1Kernel driver w83627hf
2======================
3
4Supported chips:
5  * Winbond W83627HF (ISA accesses ONLY)
6    Prefix: 'w83627hf'
7    Addresses scanned: ISA address retrieved from Super I/O registers
8  * Winbond W83627THF
9    Prefix: 'w83627thf'
10    Addresses scanned: ISA address retrieved from Super I/O registers
11  * Winbond W83697HF
12    Prefix: 'w83697hf'
13    Addresses scanned: ISA address retrieved from Super I/O registers
14  * Winbond W83637HF
15    Prefix: 'w83637hf'
16    Addresses scanned: ISA address retrieved from Super I/O registers
17  * Winbond W83687THF
18    Prefix: 'w83687thf'
19    Addresses scanned: ISA address retrieved from Super I/O registers
20    Datasheet: Provided by Winbond on request(http://www.winbond.com/hq/enu)
21
22Authors:
23	Frodo Looijaard <frodol@dds.nl>,
24	Philip Edelbrock <phil@netroedge.com>,
25	Mark Studebaker <mdsxyz123@yahoo.com>,
26	Bernhard C. Schrenk <clemy@clemy.org>
27
28Module Parameters
29-----------------
30
31* force_i2c: int
32  Initialize the I2C address of the sensors
33* init: int
34  (default is 1)
35  Use 'init=0' to bypass initializing the chip.
36  Try this if your computer crashes when you load the module.
37
38Description
39-----------
40
41This driver implements support for ISA accesses *only* for
42the Winbond W83627HF, W83627THF, W83697HF and W83637HF Super I/O chips.
43We will refer to them collectively as Winbond chips.
44
45This driver supports ISA accesses, which should be more reliable
46than i2c accesses. Also, for Tyan boards which contain both a
47Super I/O chip and a second i2c-only Winbond chip (often a W83782D),
48using this driver will avoid i2c address conflicts and complex
49initialization that were required in the w83781d driver.
50
51If you really want i2c accesses for these Super I/O chips,
52use the w83781d driver. However this is not the preferred method
53now that this ISA driver has been developed.
54
55The `w83627_HF_` uses pins 110-106 as VID0-VID4. The `w83627_THF_` uses the
56same pins as GPIO[0:4]. Technically, the `w83627_THF_` does not support a
57VID reading. However the two chips have the identical 128 pin package. So,
58it is possible or even likely for a w83627thf to have the VID signals routed
59to these pins despite their not being labeled for that purpose. Therefore,
60the w83627thf driver interprets these as VID. If the VID on your board
61doesn't work, first see doc/vid in the lm_sensors package[1]. If that still
62doesn't help, you may just ignore the bogus VID reading with no harm done.
63
64For further information on this driver see the w83781d driver documentation.
65
66[1] http://www.lm-sensors.org/browser/lm-sensors/trunk/doc/vid
67
68Forcing the address
69-------------------
70
71The driver used to have a module parameter named force_addr, which could
72be used to force the base I/O address of the hardware monitoring block.
73This was meant as a workaround for mainboards with a broken BIOS. This
74module parameter is gone for technical reasons. If you need this feature,
75you can obtain the same result by using the isaset tool (part of
76lm-sensors) before loading the driver:
77
78# Enter the Super I/O config space::
79
80	isaset -y -f 0x2e 0x87
81	isaset -y -f 0x2e 0x87
82
83# Select the hwmon logical device::
84
85	isaset -y 0x2e 0x2f 0x07 0x0b
86
87# Set the base I/O address (to 0x290 in this example)::
88
89	isaset -y 0x2e 0x2f 0x60 0x02
90	isaset -y 0x2e 0x2f 0x61 0x90
91
92# Exit the Super-I/O config space::
93
94	isaset -y -f 0x2e 0xaa
95
96The above sequence assumes a Super-I/O config space at 0x2e/0x2f, but
970x4e/0x4f is also possible.
98
99Voltage pin mapping
100-------------------
101
102Here is a summary of the voltage pin mapping for the W83627THF. This
103can be useful to convert data provided by board manufacturers into
104working libsensors configuration statements:
105
106
107- W83627THF
108
109
110  ======== =============== =============== ===============
111  Pin	   Name		   Register	   Sysfs attribute
112  ======== =============== =============== ===============
113    100	   CPUVCORE	   20h		   in0
114     99	   VIN0		   21h		   in1
115     98	   VIN1		   22h		   in2
116     97	   VIN2		   24h		   in4
117    114	   AVCC		   23h		   in3
118     61	   5VSB		   50h (bank 5)	   in7
119     74	   VBAT		   51h (bank 5)	   in8
120  ======== =============== =============== ===============
121
122For other supported devices, you'll have to take the hard path and
123look up the information in the datasheet yourself (and then add it
124to this document please.)
125