| /* 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 */ |
