/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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hwmon-vid.h - VID/VRM/VRD voltage conversions
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Originally part of lm_sensors
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Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
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With assistance from Trent Piepho <xyzzy@speakeasy.org>
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*/
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#ifndef _LINUX_HWMON_VID_H
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#define _LINUX_HWMON_VID_H
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int vid_from_reg(int val, u8 vrm);
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u8 vid_which_vrm(void);
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/* vrm is the VRM/VRD document version multiplied by 10.
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val is in mV to avoid floating point in the kernel.
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Returned value is the 4-, 5- or 6-bit VID code.
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Note that only VRM 9.x is supported for now. */
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static inline int vid_to_reg(int val, u8 vrm)
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{
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switch (vrm) {
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case 91: /* VRM 9.1 */
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case 90: /* VRM 9.0 */
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return ((val >= 1100) && (val <= 1850) ?
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((18499 - val * 10) / 25 + 5) / 10 : -1);
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default:
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return -EINVAL;
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}
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}
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#endif /* _LINUX_HWMON_VID_H */
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