diff options
| author | Andrew Paprocki <andrew@ishiboo.com> | 2008-08-06 16:41:06 -0400 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-08-06 16:41:06 -0400 |
| commit | 0475169c13e177e1af5a02f5e9f30fda13dc0b86 (patch) | |
| tree | 9366e6e093ff39b037011a392c8f97140c3ccad9 /Documentation | |
| parent | 116d0486bdefc11f71e567cadf0c47f788b4dd06 (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')
| -rw-r--r-- | Documentation/hwmon/it87 | 9 |
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 | |||
| 90 | can't have both on a given board. | 92 | can't have both on a given board. |
| 91 | 93 | ||
| 92 | The IT8716F, IT8718F and later IT8712F revisions have support for | 94 | The IT8716F, IT8718F and later IT8712F revisions have support for |
| 93 | 2 additional fans. They are supported by the driver for the IT8716F and | 95 | 2 additional fans. The additional fans are supported by the driver. |
| 94 | IT8718F but not for the IT8712F | ||
| 95 | 96 | ||
| 96 | The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional | 97 | The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional |
| 97 | 16-bit tachometer counters for fans 1 to 3. This is better (no more fan | 98 | 16-bit tachometer counters for fans 1 to 3. This is better (no more fan |
| 98 | clock divider mess) but not compatible with the older chips and | 99 | clock divider mess) but not compatible with the older chips and |
| 99 | revisions. For now, the driver only uses the 16-bit mode on the | 100 | revisions. For now, the driver only uses the 16-bit mode on the |
| 100 | IT8716F and IT8718F. | 101 | late IT8712F, IT8716F and IT8718F. |
| 101 | 102 | ||
| 102 | The IT8726F is just bit enhanced IT8716F with additional hardware | 103 | The IT8726F is just bit enhanced IT8716F with additional hardware |
| 103 | for AMD power sequencing. Therefore the chip will appear as IT8716F | 104 | for AMD power sequencing. Therefore the chip will appear as IT8716F |