diff options
| author | Frank Myhr <fmyhr@fhmtech.com> | 2008-08-06 22:41:06 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-08-06 22:41:06 +0200 |
| commit | 116d0486bdefc11f71e567cadf0c47f788b4dd06 (patch) | |
| tree | 2c403aedb7e476942b28fb5dbb88cd5266f4d178 /drivers/hwmon/hwmon-vid.c | |
| parent | hwmon: (hwmon-vid) Trivial format multi-line comments per CodingStyle (diff) | |
| download | linux-116d0486bdefc11f71e567cadf0c47f788b4dd06.tar.xz linux-116d0486bdefc11f71e567cadf0c47f788b4dd06.zip | |
hwmon: (hwmon-vid) Add 6-bit vid codes for AMD NPT 0Fh cpus
AMD NPT 0Fh cpus use 6 bit VID codes. Successive codes with msb 0
describe 25mV decrements, while those with msb 1 describe 12.5mV
decrements. Existing hwmon-vid.c is correct only for codes with msb 0;
add support for the codes with msb 1.
Ref:
p 309, Table 71
AMD Publication 32559, BIOS and Kernel Developer's Guide for AMD NPT Family 0Fh Processors
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/32559.pdf
Signed-off-by: Frank Myhr <fmyhr@fhmtech.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/hwmon-vid.c')
| -rw-r--r-- | drivers/hwmon/hwmon-vid.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c index ed78a72e7261..7b0a32c4dcfb 100644 --- a/drivers/hwmon/hwmon-vid.c +++ b/drivers/hwmon/hwmon-vid.c @@ -37,18 +37,14 @@ * For VRD 10.0 and up, "VRD x.y Design Guide", * available at http://developer.intel.com/. * + * AMD NPT 0Fh (Athlon64 & Opteron), AMD Publication 32559, + * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/32559.pdf + * Table 71. VID Code Voltages * AMD Opteron processors don't follow the Intel specifications. * I'm going to "make up" 2.4 as the spec number for the Opterons. * No good reason just a mnemonic for the 24x Opteron processor * series. * - * Opteron VID encoding is: - * 00000 = 1.550 V - * 00001 = 1.525 V - * . . . . - * 11110 = 0.800 V - * 11111 = 0.000 V (off) - * * The 17 specification is in fact Intel Mobile Voltage Positioning - * (IMVP-II). You can find more information in the datasheet of Max1718 * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2452 @@ -98,9 +94,11 @@ int vid_from_reg(int val, u8 vrm) if (val < 0x02 || val > 0xb2) return 0; return((1600000 - (val - 2) * 6250 + 500) / 1000); - case 24: /* Opteron processor */ - val &= 0x1f; - return(val == 0x1f ? 0 : 1550 - val * 25); + + case 24: /* AMD NPT 0Fh (Athlon64 & Opteron) */ + val &= 0x3f; + return (val < 32) ? 1550 - 25 * val + : 775 - (25 * (val - 31)) / 2; case 91: /* VRM 9.1 */ case 90: /* VRM 9.0 */ |