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authorAndrew Paprocki <andrew@ishiboo.com>2008-08-06 22:41:06 +0200
committerJean Delvare <khali@mahadeva.delvare>2008-08-06 22:41:06 +0200
commit0475169c13e177e1af5a02f5e9f30fda13dc0b86 (patch)
tree9366e6e093ff39b037011a392c8f97140c3ccad9 /Documentation
parent116d0486bdefc11f71e567cadf0c47f788b4dd06 (diff)
downloadop-kernel-dev-0475169c13e177e1af5a02f5e9f30fda13dc0b86.zip
op-kernel-dev-0475169c13e177e1af5a02f5e9f30fda13dc0b86.tar.gz
hwmon: (it87) Support for 16-bit fan reading in it8712 >= rev 0x07
The it8712 chip supports 16-bit fan tachometers in revisions >= 0x07. Revisions >= 0x08 dropped support for 8-bit fan divisor registers. The patch enables 16-bit fan readings on all revisions >= 0x07 just like the it8716 and it8718 chips. Signed-off-by: Andrew Paprocki <andrew@ishiboo.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/it879
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index f4ce1fd..d931525 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -11,7 +11,9 @@ Supported chips:
Prefix: 'it8712'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
- http://www.ite.com.tw/
+ http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.1.pdf
+ http://www.ite.com.tw/product_info/file/pc/Errata%20V0.1%20for%20IT8712F%20V0.9.1.pdf
+ http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.3.pdf
* IT8716F/IT8726F
Prefix: 'it8716'
Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -90,14 +92,13 @@ upper VID bits share their pins with voltage inputs (in5 and in6) so you
can't have both on a given board.
The IT8716F, IT8718F and later IT8712F revisions have support for
-2 additional fans. They are supported by the driver for the IT8716F and
-IT8718F but not for the IT8712F
+2 additional fans. The additional fans are supported by the driver.
The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional
16-bit tachometer counters for fans 1 to 3. This is better (no more fan
clock divider mess) but not compatible with the older chips and
revisions. For now, the driver only uses the 16-bit mode on the
-IT8716F and IT8718F.
+late IT8712F, IT8716F and IT8718F.
The IT8726F is just bit enhanced IT8716F with additional hardware
for AMD power sequencing. Therefore the chip will appear as IT8716F
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