| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| /* | |
| 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> | |
| */ | |
| #ifndef _LINUX_HWMON_VID_H | |
| #define _LINUX_HWMON_VID_H | |
| int vid_from_reg(int val, u8 vrm); | |
| u8 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, u8 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 -EINVAL; | |
| } | |
| } | |
| #endif /* _LINUX_HWMON_VID_H */ |