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authorAndrew Paprocki <andrew@ishiboo.com>2008-08-06 16:41:06 -0400
committerJean Delvare <khali@mahadeva.delvare>2008-08-06 16:41:06 -0400
commit0475169c13e177e1af5a02f5e9f30fda13dc0b86 (patch)
tree9366e6e093ff39b037011a392c8f97140c3ccad9 /Documentation/hwmon
parent116d0486bdefc11f71e567cadf0c47f788b4dd06 (diff)
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/hwmon')
-rw-r--r--Documentation/hwmon/it879
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index f4ce1fdbeff6..d931525f3f37 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -11,7 +11,9 @@ Supported chips:
11 Prefix: 'it8712' 11 Prefix: 'it8712'
12 Addresses scanned: from Super I/O config space (8 I/O ports) 12 Addresses scanned: from Super I/O config space (8 I/O ports)
13 Datasheet: Publicly available at the ITE website 13 Datasheet: Publicly available at the ITE website
14 http://www.ite.com.tw/ 14 http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.1.pdf
15 http://www.ite.com.tw/product_info/file/pc/Errata%20V0.1%20for%20IT8712F%20V0.9.1.pdf
16 http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.3.pdf
15 * IT8716F/IT8726F 17 * IT8716F/IT8726F
16 Prefix: 'it8716' 18 Prefix: 'it8716'
17 Addresses scanned: from Super I/O config space (8 I/O ports) 19 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
90can't have both on a given board. 92can't have both on a given board.
91 93
92The IT8716F, IT8718F and later IT8712F revisions have support for 94The IT8716F, IT8718F and later IT8712F revisions have support for
932 additional fans. They are supported by the driver for the IT8716F and 952 additional fans. The additional fans are supported by the driver.
94IT8718F but not for the IT8712F
95 96
96The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional 97The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional
9716-bit tachometer counters for fans 1 to 3. This is better (no more fan 9816-bit tachometer counters for fans 1 to 3. This is better (no more fan
98clock divider mess) but not compatible with the older chips and 99clock divider mess) but not compatible with the older chips and
99revisions. For now, the driver only uses the 16-bit mode on the 100revisions. For now, the driver only uses the 16-bit mode on the
100IT8716F and IT8718F. 101late IT8712F, IT8716F and IT8718F.
101 102
102The IT8726F is just bit enhanced IT8716F with additional hardware 103The IT8726F is just bit enhanced IT8716F with additional hardware
103for AMD power sequencing. Therefore the chip will appear as IT8716F 104for AMD power sequencing. Therefore the chip will appear as IT8716F