1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun hwmon-vid.h - VID/VRM/VRD voltage conversions 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun Originally part of lm_sensors 6*4882a593Smuzhiyun Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> 7*4882a593Smuzhiyun With assistance from Trent Piepho <xyzzy@speakeasy.org> 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _LINUX_HWMON_VID_H 12*4882a593Smuzhiyun #define _LINUX_HWMON_VID_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun int vid_from_reg(int val, u8 vrm); 15*4882a593Smuzhiyun u8 vid_which_vrm(void); 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* vrm is the VRM/VRD document version multiplied by 10. 18*4882a593Smuzhiyun val is in mV to avoid floating point in the kernel. 19*4882a593Smuzhiyun Returned value is the 4-, 5- or 6-bit VID code. 20*4882a593Smuzhiyun Note that only VRM 9.x is supported for now. */ vid_to_reg(int val,u8 vrm)21*4882a593Smuzhiyunstatic inline int vid_to_reg(int val, u8 vrm) 22*4882a593Smuzhiyun { 23*4882a593Smuzhiyun switch (vrm) { 24*4882a593Smuzhiyun case 91: /* VRM 9.1 */ 25*4882a593Smuzhiyun case 90: /* VRM 9.0 */ 26*4882a593Smuzhiyun return ((val >= 1100) && (val <= 1850) ? 27*4882a593Smuzhiyun ((18499 - val * 10) / 25 + 5) / 10 : -1); 28*4882a593Smuzhiyun default: 29*4882a593Smuzhiyun return -EINVAL; 30*4882a593Smuzhiyun } 31*4882a593Smuzhiyun } 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #endif /* _LINUX_HWMON_VID_H */ 34