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/* 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 */
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