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Commit | Line | Data |
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1 | /* | |
2 | hwmon-vid.h - VID/VRM/VRD voltage conversions | |
3 | ||
4 | Originally part of lm_sensors | |
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 | ||
23 | #ifndef _LINUX_HWMON_VID_H | |
24 | #define _LINUX_HWMON_VID_H | |
25 | ||
26 | int vid_from_reg(int val, u8 vrm); | |
27 | u8 vid_which_vrm(void); | |
28 | ||
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. */ | |
33 | static inline int vid_to_reg(int val, u8 vrm) | |
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 -EINVAL; | |
42 | } | |
43 | } | |
44 | ||
45 | #endif /* _LINUX_HWMON_VID_H */ |