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authorJean Delvare <khali@linux-fr.org>2006-08-28 08:23:46 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-28 18:31:13 -0400
commit17d648bf5786ba5b8cbf7cbd5cb18d3d8d2657ca (patch)
tree8761d44284bbff01c0bd720c6cfd47a42b145978 /Documentation/hwmon/it87
parent0dd7699ec4b27b3662d8980ff7a309cc81276298 (diff)
it87: Add support for the IT8716F
it87: Add support for the IT8716F The IT8716F is a Super-I/O chip with integrated hardware monitoring functions. It is very similar to the IT8712F, so adding support to the it87 driver was pretty straightforward. The most significant change here is that the IT8716F has 16-bit fan speed counters, so the user no more needs to tweak the fan clock dividers to get the best readings. Userspace support is already in lm_sensors SVN (to be soon released as 2.10.1.) Thanks to Stian Oksavik, Olivier Nicolas, Prakash Punnoor and Juergen Kilb for testing the early versions of this patch. Thanks also to ITE for providing datasheets and answering my questions. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/hwmon/it87')
-rw-r--r--Documentation/hwmon/it8740
1 files changed, 29 insertions, 11 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 9555be1ed999..aff680784222 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -13,6 +13,11 @@ Supported chips:
13 from Super I/O config space (8 I/O ports) 13 from Super I/O config space (8 I/O ports)
14 Datasheet: Publicly available at the ITE website 14 Datasheet: Publicly available at the ITE website
15 http://www.ite.com.tw/ 15 http://www.ite.com.tw/
16 * IT8716F
17 Prefix: 'it8716'
18 Addresses scanned: from Super I/O config space (8 I/O ports)
19 Datasheet: Publicly available at the ITE website
20 http://www.ite.com.tw/product_info/file/pc/IT8716F_V0.3.ZIP
16 * SiS950 [clone of IT8705F] 21 * SiS950 [clone of IT8705F]
17 Prefix: 'it87' 22 Prefix: 'it87'
18 Addresses scanned: from Super I/O config space (8 I/O ports) 23 Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -43,26 +48,39 @@ Module Parameters
43Description 48Description
44----------- 49-----------
45 50
46This driver implements support for the IT8705F, IT8712F and SiS950 chips. 51This driver implements support for the IT8705F, IT8712F, IT8716F and
47 52SiS950 chips.
48This driver also supports IT8712F, which adds SMBus access, and a VID
49input, used to report the Vcore voltage of the Pentium processor.
50The IT8712F additionally features VID inputs.
51 53
52These chips are 'Super I/O chips', supporting floppy disks, infrared ports, 54These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
53joysticks and other miscellaneous stuff. For hardware monitoring, they 55joysticks and other miscellaneous stuff. For hardware monitoring, they
54include an 'environment controller' with 3 temperature sensors, 3 fan 56include an 'environment controller' with 3 temperature sensors, 3 fan
55rotation speed sensors, 8 voltage sensors, and associated alarms. 57rotation speed sensors, 8 voltage sensors, and associated alarms.
56 58
59The IT8712F and IT8716F additionally feature VID inputs, used to report
60the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
61the IT8716F and late IT8712F have 6. They are shared with other functions
62though, so the functionality may not be available on a given system.
63The driver dumbly assume it is there.
64
65The IT8716F and later IT8712F revisions have support for 2 additional
66fans. They are not yet supported by the driver.
67
68The IT8716F and late IT8712F and IT8705F also have optional 16-bit
69tachometer counters for fans 1 to 3. This is better (no more fan
70clock divider mess) but not compatible with the older chips and
71revisions. For now, the driver only uses the 16-bit mode on the
72IT8716F.
73
57Temperatures are measured in degrees Celsius. An alarm is triggered once 74Temperatures are measured in degrees Celsius. An alarm is triggered once
58when the Overtemperature Shutdown limit is crossed. 75when the Overtemperature Shutdown limit is crossed.
59 76
60Fan rotation speeds are reported in RPM (rotations per minute). An alarm is 77Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
61triggered if the rotation speed has dropped below a programmable limit. Fan 78triggered if the rotation speed has dropped below a programmable limit. When
62readings can be divided by a programmable divider (1, 2, 4 or 8) to give the 7916-bit tachometer counters aren't used, fan readings can be divided by
63readings more range or accuracy. Not all RPM values can accurately be 80a programmable divider (1, 2, 4 or 8) to give the readings more range or
64represented, so some rounding is done. With a divider of 2, the lowest 81accuracy. With a divider of 2, the lowest representable value is around
65representable value is around 2600 RPM. 822600 RPM. Not all RPM values can accurately be represented, so some rounding
83is done.
66 84
67Voltage sensors (also known as IN sensors) report their values in volts. An 85Voltage sensors (also known as IN sensors) report their values in volts. An
68alarm is triggered if the voltage has crossed a programmable minimum or 86alarm is triggered if the voltage has crossed a programmable minimum or
@@ -71,7 +89,7 @@ zero'; this is important for negative voltage measurements. All voltage
71inputs can measure voltages between 0 and 4.08 volts, with a resolution of 89inputs can measure voltages between 0 and 4.08 volts, with a resolution of
720.016 volt. The battery voltage in8 does not have limit registers. 900.016 volt. The battery voltage in8 does not have limit registers.
73 91
74The VID lines (IT8712F only) encode the core voltage value: the voltage 92The VID lines (IT8712F/IT8716F) encode the core voltage value: the voltage
75level your processor should work with. This is hardcoded by the mainboard 93level your processor should work with. This is hardcoded by the mainboard
76and/or processor itself. It is a value in volts. 94and/or processor itself. It is a value in volts.
77 95