hwmon-vid.h
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上传日期:2009-04-28
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- /*
- hwmon-vid.h - VID/VRM/VRD voltage conversions
- Originally part of lm_sensors
- Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
- With assistance from Trent Piepho <xyzzy@speakeasy.org>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef _LINUX_HWMON_VID_H
- #define _LINUX_HWMON_VID_H
- int vid_from_reg(int val, int vrm);
- int vid_which_vrm(void);
- /* vrm is the VRM/VRD document version multiplied by 10.
- val is in mV to avoid floating point in the kernel.
- Returned value is the 4-, 5- or 6-bit VID code.
- Note that only VRM 9.x is supported for now. */
- static inline int vid_to_reg(int val, int vrm)
- {
- switch (vrm) {
- case 91: /* VRM 9.1 */
- case 90: /* VRM 9.0 */
- return ((val >= 1100) && (val <= 1850) ?
- ((18499 - val * 10) / 25 + 5) / 10 : -1);
- default:
- return -1;
- }
- }
- #endif /* _LINUX_HWMON_VID_H */