/* First check for LM75A */
if (i2c_smbus_read_byte_data(new_client, 7) == LM75A_ID) {
- /* LM75A returns 0xff on unused registers so
- just to be sure we check for that too. */
+ /*
+ * LM75A returns 0xff on unused registers so
+ * just to be sure we check for that too.
+ */
if (i2c_smbus_read_byte_data(new_client, 4) != 0xff
|| i2c_smbus_read_byte_data(new_client, 5) != 0xff
|| i2c_smbus_read_byte_data(new_client, 6) != 0xff)
{
int status;
struct i2c_client *client = to_i2c_client(dev);
+
status = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
if (status < 0) {
dev_dbg(&client->dev, "Can't read config? %d\n", status);
{
int status;
struct i2c_client *client = to_i2c_client(dev);
+
status = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
if (status < 0) {
dev_dbg(&client->dev, "Can't read config? %d\n", status);
/* 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>
#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;
}