projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 303760b4 JD |
2 | hwmon-vid.h - VID/VRM/VRD voltage conversions |
| 3 | ||
| 4 | Originally part of lm_sensors | |
| 1da177e4 LT |
5 | Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> |
| 6 | With assistance from Trent Piepho <xyzzy@speakeasy.org> | |
| 7 | ||
| 8 | This program is free software; you can redistribute it and/or modify | |
| 9 | it under the terms of the GNU General Public License as published by | |
| 10 | the Free Software Foundation; either version 2 of the License, or | |
| 11 | (at your option) any later version. | |
| 12 | ||
| 13 | This program is distributed in the hope that it will be useful, | |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | GNU General Public License for more details. | |
| 17 | ||
| 18 | You should have received a copy of the GNU General Public License | |
| 19 | along with this program; if not, write to the Free Software | |
| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 21 | */ | |
| 22 | ||
| d0f28270 JD |
23 | #ifndef _LINUX_HWMON_VID_H |
| 24 | #define _LINUX_HWMON_VID_H | |
| 1da177e4 | 25 | |
| 734a12a3 RM |
26 | int vid_from_reg(int val, u8 vrm); |
| 27 | u8 vid_which_vrm(void); | |
| 1da177e4 | 28 | |
| d0f28270 JD |
29 | /* vrm is the VRM/VRD document version multiplied by 10. |
| 30 | val is in mV to avoid floating point in the kernel. | |
| 31 | Returned value is the 4-, 5- or 6-bit VID code. | |
| 32 | Note that only VRM 9.x is supported for now. */ | |
| 734a12a3 | 33 | static inline int vid_to_reg(int val, u8 vrm) |
| 3886246a SW |
34 | { |
| 35 | switch (vrm) { | |
| 36 | case 91: /* VRM 9.1 */ | |
| 37 | case 90: /* VRM 9.0 */ | |
| 38 | return ((val >= 1100) && (val <= 1850) ? | |
| 39 | ((18499 - val * 10) / 25 + 5) / 10 : -1); | |
| 40 | default: | |
| 41 | return -1; | |
| 42 | } | |
| 43 | } | |
| d0f28270 JD |
44 | |
| 45 | #endif /* _LINUX_HWMON_VID_H */ |