diff options
Diffstat (limited to 'drivers/hwmon/lm75.h')
| -rw-r--r-- | drivers/hwmon/lm75.h | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/drivers/hwmon/lm75.h b/drivers/hwmon/lm75.h index b614e6328566..b803ada5e3c9 100644 --- a/drivers/hwmon/lm75.h +++ b/drivers/hwmon/lm75.h @@ -1,37 +1,41 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ /* - lm75.h - Part of lm_sensors, Linux kernel modules for hardware - monitoring - Copyright (c) 2003 Mark M. Hoffman <mhoffman@lightlink.com> - -*/ + * lm75.h - Part of lm_sensors, Linux kernel modules for hardware monitoring + * Copyright (c) 2003 Mark M. Hoffman <mhoffman@lightlink.com> + */ /* - This file contains common code for encoding/decoding LM75 type - temperature readings, which are emulated by many of the chips - we support. As the user is unlikely to load more than one driver - which contains this code, we don't worry about the wasted space. -*/ + * This file contains common code for encoding/decoding LM75 type + * temperature readings, which are emulated by many of the chips + * we support. As the user is unlikely to load more than one driver + * which contains this code, we don't worry about the wasted space. + */ -#include <linux/kernel.h> +#include <linux/minmax.h> +#include <linux/types.h> /* straight from the datasheet */ #define LM75_TEMP_MIN (-55000) #define LM75_TEMP_MAX 125000 #define LM75_SHUTDOWN 0x01 -/* TEMP: 0.001C/bit (-55C to +125C) - REG: (0.5C/bit, two's complement) << 7 */ +/* + * TEMP: 0.001C/bit (-55C to +125C) + * REG: (0.5C/bit, two's complement) << 7 + */ static inline u16 LM75_TEMP_TO_REG(long temp) { int ntemp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX); + ntemp += (ntemp < 0 ? -250 : 250); return (u16)((ntemp / 500) << 7); } static inline int LM75_TEMP_FROM_REG(u16 reg) { - /* use integer division instead of equivalent right shift to - guarantee arithmetic shift and preserve the sign */ + /* + * use integer division instead of equivalent right shift to + * guarantee arithmetic shift and preserve the sign + */ return ((s16)reg / 128) * 500; } |