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https://github.com/lm-sensors/lm-sensors.git
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Jean Delvare
ea30854a22
VRM for all drivers. Same was done it Linux 2.6 some times ago. Also comment out all "set vrm" lines in sensors.conf.eg, as Linux 2.6 now accurately deduces the VRM from the CPU model. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3190 7894878c-1315-0410-8ee3-d5d059ff63e0
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*
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sensors_vid.h - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (c) 2002-2004 Mark D. Studebaker <mdsxyz123@yahoo.com>
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With assistance from Trent Piepho <xyzzy@speakeasy.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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This file contains common code for decoding VID pins.
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This file is #included in various sensor chip drivers.
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As the user is unlikely to load more than one driver which
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includes this code we don't worry about the wasted space.
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References: VRM x.y DC-DC Converter Design Guidelines,
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VRD 10.0 Design Guide,
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available at http://developer.intel.com
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*/
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/*
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AMD Opteron processors don't follow the Intel VRM spec.
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I'm going to "make up" 2.4 as the VRM spec for the Opterons.
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No good reason just a mnemonic for the 24x Opteron processor
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series
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Opteron VID encoding is:
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00000 = 1.550 V
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00001 = 1.525 V
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. . . .
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11110 = 0.800 V
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11111 = 0.000 V (off)
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*/
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/*
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Legal val values 00 - 1F except for VRD 10.0, 0x00-0x3f.
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vrm is the Intel VRM document version.
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Note: vrm version is scaled by 10 and the return value is scaled by 1000
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to avoid floating point in the kernel.
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*/
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static inline int vid_from_reg(int val, int vrm)
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{
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int vid;
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switch(vrm) {
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case 100: /* VRD 10.0 */
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if((val & 0x1f) == 0x1f)
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return 0;
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if((val & 0x1f) <= 0x09 || val == 0x0a)
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vid = 10875 - (val & 0x1f) * 250;
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else
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vid = 18625 - (val & 0x1f) * 250;
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if(val & 0x20)
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vid -= 125;
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vid /= 10; /* only return 3 dec. places for now */
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return vid;
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case 24: /* Opteron processor */
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return(val == 0x1f ? 0 : 1550 - val * 25);
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case 91: /* VRM 9.1 */
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case 90: /* VRM 9.0 */
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return(val == 0x1f ? 0 :
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1850 - val * 25);
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case 85: /* VRM 8.5 */
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return((val & 0x10 ? 25 : 0) +
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((val & 0x0f) > 0x04 ? 2050 : 1250) -
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((val & 0x0f) * 50));
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case 84: /* VRM 8.4 */
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val &= 0x0f;
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/* fall through */
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default: /* VRM 8.2 */
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return(val == 0x1f ? 0 :
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val & 0x10 ? 5100 - (val) * 100 :
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2050 - (val) * 50);
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}
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}
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