lm73.c (9a64e8e0ace51b309fdcff4b4754b3649250382a) lm73.c (0602934f302e016e2ea5dc6951681bfac77455ef)
1/*
2 * LM73 Sensor driver
3 * Based on LM75
4 *
5 * Copyright (C) 2007, CenoSYS (www.cenosys.com).
6 * Copyright (C) 2009, Bollore telecom (www.bolloretelecom.eu).
7 *
8 * Guillaume Ligneul <guillaume.ligneul@gmail.com>

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44
45static ssize_t set_temp(struct device *dev, struct device_attribute *da,
46 const char *buf, size_t count)
47{
48 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
49 struct i2c_client *client = to_i2c_client(dev);
50 long temp;
51 short value;
1/*
2 * LM73 Sensor driver
3 * Based on LM75
4 *
5 * Copyright (C) 2007, CenoSYS (www.cenosys.com).
6 * Copyright (C) 2009, Bollore telecom (www.bolloretelecom.eu).
7 *
8 * Guillaume Ligneul <guillaume.ligneul@gmail.com>

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44
45static ssize_t set_temp(struct device *dev, struct device_attribute *da,
46 const char *buf, size_t count)
47{
48 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
49 struct i2c_client *client = to_i2c_client(dev);
50 long temp;
51 short value;
52 s32 err;
52
53 int status = kstrtol(buf, 10, &temp);
54 if (status < 0)
55 return status;
56
57 /* Write value */
58 value = (short) SENSORS_LIMIT(temp/250, (LM73_TEMP_MIN*4),
59 (LM73_TEMP_MAX*4)) << 5;
53
54 int status = kstrtol(buf, 10, &temp);
55 if (status < 0)
56 return status;
57
58 /* Write value */
59 value = (short) SENSORS_LIMIT(temp/250, (LM73_TEMP_MIN*4),
60 (LM73_TEMP_MAX*4)) << 5;
60 i2c_smbus_write_word_swapped(client, attr->index, value);
61 return count;
61 err = i2c_smbus_write_word_swapped(client, attr->index, value);
62 return (err < 0) ? err : count;
62}
63
64static ssize_t show_temp(struct device *dev, struct device_attribute *da,
65 char *buf)
66{
67 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
68 struct i2c_client *client = to_i2c_client(dev);
63}
64
65static ssize_t show_temp(struct device *dev, struct device_attribute *da,
66 char *buf)
67{
68 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
69 struct i2c_client *client = to_i2c_client(dev);
70 int temp;
71
72 s32 err = i2c_smbus_read_word_swapped(client, attr->index);
73 if (err < 0)
74 return err;
75
69 /* use integer division instead of equivalent right shift to
70 guarantee arithmetic shift and preserve the sign */
76 /* use integer division instead of equivalent right shift to
77 guarantee arithmetic shift and preserve the sign */
71 int temp = ((s16) (i2c_smbus_read_word_swapped(client,
72 attr->index))*250) / 32;
73 return sprintf(buf, "%d\n", temp);
78 temp = (((s16) err) * 250) / 32;
79 return scnprintf(buf, PAGE_SIZE, "%d\n", temp);
74}
75
76
77/*-----------------------------------------------------------------------*/
78
79/* sysfs attributes for hwmon */
80
81static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,

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81
82
83/*-----------------------------------------------------------------------*/
84
85/* sysfs attributes for hwmon */
86
87static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,

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