cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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lm75.h (1095B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * lm75.h - Part of lm_sensors, Linux kernel modules for hardware monitoring
      4 * Copyright (c) 2003 Mark M. Hoffman <mhoffman@lightlink.com>
      5 */
      6
      7/*
      8 * This file contains common code for encoding/decoding LM75 type
      9 * temperature readings, which are emulated by many of the chips
     10 * we support.  As the user is unlikely to load more than one driver
     11 * which contains this code, we don't worry about the wasted space.
     12 */
     13
     14#include <linux/kernel.h>
     15
     16/* straight from the datasheet */
     17#define LM75_TEMP_MIN (-55000)
     18#define LM75_TEMP_MAX 125000
     19#define LM75_SHUTDOWN 0x01
     20
     21/*
     22 * TEMP: 0.001C/bit (-55C to +125C)
     23 * REG: (0.5C/bit, two's complement) << 7
     24 */
     25static inline u16 LM75_TEMP_TO_REG(long temp)
     26{
     27	int ntemp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX);
     28
     29	ntemp += (ntemp < 0 ? -250 : 250);
     30	return (u16)((ntemp / 500) << 7);
     31}
     32
     33static inline int LM75_TEMP_FROM_REG(u16 reg)
     34{
     35	/*
     36	 * use integer division instead of equivalent right shift to
     37	 * guarantee arithmetic shift and preserve the sign
     38	 */
     39	return ((s16)reg / 128) * 500;
     40}