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hwmon: (it87) Add IT8728F support

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Until we get a datasheet for the IT8728F, treat it as fully compatible
with the IT8721F, as it seems to work reasonably well.

This closes kernel bug #27262.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Jean Delvare
2012-01-16 22:51:48 +01:00
committed by Jean Delvare
parent d6db23c7ce
commit 16b5dda22e
3 changed files with 58 additions and 20 deletions
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13
Documentation/hwmon/it87
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@@ -26,6 +26,10 @@ Supported chips:
Prefix: 'it8721'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
* IT8728F
Prefix: 'it8728'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
* SiS950 [clone of IT8705F]
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -71,7 +75,7 @@ Description
-----------
This driver implements support for the IT8705F, IT8712F, IT8716F,
IT8718F, IT8720F, IT8721F, IT8726F, IT8758E and SiS950 chips.
IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E and SiS950 chips.
These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
@@ -105,6 +109,9 @@ The IT8726F is just bit enhanced IT8716F with additional hardware
for AMD power sequencing. Therefore the chip will appear as IT8716F
to userspace applications.
The IT8728F is considered compatible with the IT8721F, until a datasheet
becomes available (hopefully.)
Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed.
@@ -121,8 +128,8 @@ alarm is triggered if the voltage has crossed a programmable minimum or
maximum limit. Note that minimum in this case always means 'closest to
zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution of
0.016 volt (except IT8721F/IT8758E: 0.012 volt.) The battery voltage in8 does
not have limit registers.
0.016 volt (except IT8721F/IT8758E and IT8728F: 0.012 volt.) The battery
voltage in8 does not have limit registers.
On the IT8721F/IT8758E, some voltage inputs are internal and scaled inside
the chip (in7, in8 and optionally in3). The driver handles this transparently