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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 -1; |
42 | } |
43 | } |
44 | |
45 | #endif /* _LINUX_HWMON_VID_H */ |
46 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9