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33 lines
862 B
33 lines
862 B
/* 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 <[email protected]> |
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With assistance from Trent Piepho <[email protected]> |
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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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