diff options
Diffstat (limited to 'drivers/hwmon')
-rw-r--r-- | drivers/hwmon/Kconfig | 9 | ||||
-rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
-rw-r--r-- | drivers/hwmon/lm73.c | 205 |
3 files changed, 215 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 700e93adeb33..87184b5f401d 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig | |||
@@ -442,6 +442,15 @@ config SENSORS_LM70 | |||
442 | This driver can also be built as a module. If so, the module | 442 | This driver can also be built as a module. If so, the module |
443 | will be called lm70. | 443 | will be called lm70. |
444 | 444 | ||
445 | config SENSORS_LM73 | ||
446 | tristate "National Semiconductor LM73" | ||
447 | depends on I2C | ||
448 | help | ||
449 | If you say yes here you get support for National Semiconductor LM73 | ||
450 | sensor chips. | ||
451 | This driver can also be built as a module. If so, the module | ||
452 | will be called lm73. | ||
453 | |||
445 | config SENSORS_LM75 | 454 | config SENSORS_LM75 |
446 | tristate "National Semiconductor LM75 and compatibles" | 455 | tristate "National Semiconductor LM75 and compatibles" |
447 | depends on I2C | 456 | depends on I2C |
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 9f46cb019cc6..a24a52d12dc5 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile | |||
@@ -57,6 +57,7 @@ obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o hp_accel.o | |||
57 | obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d.o lis3lv02d_spi.o | 57 | obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d.o lis3lv02d_spi.o |
58 | obj-$(CONFIG_SENSORS_LM63) += lm63.o | 58 | obj-$(CONFIG_SENSORS_LM63) += lm63.o |
59 | obj-$(CONFIG_SENSORS_LM70) += lm70.o | 59 | obj-$(CONFIG_SENSORS_LM70) += lm70.o |
60 | obj-$(CONFIG_SENSORS_LM73) += lm73.o | ||
60 | obj-$(CONFIG_SENSORS_LM75) += lm75.o | 61 | obj-$(CONFIG_SENSORS_LM75) += lm75.o |
61 | obj-$(CONFIG_SENSORS_LM77) += lm77.o | 62 | obj-$(CONFIG_SENSORS_LM77) += lm77.o |
62 | obj-$(CONFIG_SENSORS_LM78) += lm78.o | 63 | obj-$(CONFIG_SENSORS_LM78) += lm78.o |
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c new file mode 100644 index 000000000000..0bf8b2a8e9f0 --- /dev/null +++ b/drivers/hwmon/lm73.c | |||
@@ -0,0 +1,205 @@ | |||
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> | ||
9 | * Adrien Demarez <adrien.demarez@bolloretelecom.eu> | ||
10 | * Jeremy Laine <jeremy.laine@bolloretelecom.eu> | ||
11 | * | ||
12 | * This software program is licensed subject to the GNU General Public License | ||
13 | * (GPL).Version 2,June 1991, available at | ||
14 | * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html | ||
15 | */ | ||
16 | |||
17 | #include <linux/module.h> | ||
18 | #include <linux/init.h> | ||
19 | #include <linux/slab.h> | ||
20 | #include <linux/i2c.h> | ||
21 | #include <linux/hwmon.h> | ||
22 | #include <linux/hwmon-sysfs.h> | ||
23 | #include <linux/err.h> | ||
24 | |||
25 | |||
26 | /* Addresses scanned */ | ||
27 | static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, | ||
28 | 0x4d, 0x4e, I2C_CLIENT_END }; | ||
29 | |||
30 | /* Insmod parameters */ | ||
31 | I2C_CLIENT_INSMOD_1(lm73); | ||
32 | |||
33 | /* LM73 registers */ | ||
34 | #define LM73_REG_INPUT 0x00 | ||
35 | #define LM73_REG_CONF 0x01 | ||
36 | #define LM73_REG_MAX 0x02 | ||
37 | #define LM73_REG_MIN 0x03 | ||
38 | #define LM73_REG_CTRL 0x04 | ||
39 | #define LM73_REG_ID 0x07 | ||
40 | |||
41 | #define LM73_ID 0x9001 /* or 0x190 after a swab16() */ | ||
42 | #define DRVNAME "lm73" | ||
43 | #define LM73_TEMP_MIN (-40) | ||
44 | #define LM73_TEMP_MAX 150 | ||
45 | |||
46 | /*-----------------------------------------------------------------------*/ | ||
47 | |||
48 | |||
49 | static ssize_t set_temp(struct device *dev, struct device_attribute *da, | ||
50 | const char *buf, size_t count) | ||
51 | { | ||
52 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | ||
53 | struct i2c_client *client = to_i2c_client(dev); | ||
54 | long temp; | ||
55 | short value; | ||
56 | |||
57 | int status = strict_strtol(buf, 10, &temp); | ||
58 | if (status < 0) | ||
59 | return status; | ||
60 | |||
61 | /* Write value */ | ||
62 | value = (short) SENSORS_LIMIT(temp/250, (LM73_TEMP_MIN*4), | ||
63 | (LM73_TEMP_MAX*4)) << 5; | ||
64 | i2c_smbus_write_word_data(client, attr->index, swab16(value)); | ||
65 | return count; | ||
66 | } | ||
67 | |||
68 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, | ||
69 | char *buf) | ||
70 | { | ||
71 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | ||
72 | struct i2c_client *client = to_i2c_client(dev); | ||
73 | /* use integer division instead of equivalent right shift to | ||
74 | guarantee arithmetic shift and preserve the sign */ | ||
75 | int temp = ((s16) (swab16(i2c_smbus_read_word_data(client, | ||
76 | attr->index)))*250) / 32; | ||
77 | return sprintf(buf, "%d\n", temp); | ||
78 | } | ||
79 | |||
80 | |||
81 | /*-----------------------------------------------------------------------*/ | ||
82 | |||
83 | /* sysfs attributes for hwmon */ | ||
84 | |||
85 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, | ||
86 | show_temp, set_temp, LM73_REG_MAX); | ||
87 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, | ||
88 | show_temp, set_temp, LM73_REG_MIN); | ||
89 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, | ||
90 | show_temp, NULL, LM73_REG_INPUT); | ||
91 | |||
92 | |||
93 | static struct attribute *lm73_attributes[] = { | ||
94 | &sensor_dev_attr_temp1_input.dev_attr.attr, | ||
95 | &sensor_dev_attr_temp1_max.dev_attr.attr, | ||
96 | &sensor_dev_attr_temp1_min.dev_attr.attr, | ||
97 | |||
98 | NULL | ||
99 | }; | ||
100 | |||
101 | static const struct attribute_group lm73_group = { | ||
102 | .attrs = lm73_attributes, | ||
103 | }; | ||
104 | |||
105 | /*-----------------------------------------------------------------------*/ | ||
106 | |||
107 | /* device probe and removal */ | ||
108 | |||
109 | static int | ||
110 | lm73_probe(struct i2c_client *client, const struct i2c_device_id *id) | ||
111 | { | ||
112 | struct device *hwmon_dev; | ||
113 | int status; | ||
114 | |||
115 | /* Register sysfs hooks */ | ||
116 | status = sysfs_create_group(&client->dev.kobj, &lm73_group); | ||
117 | if (status) | ||
118 | return status; | ||
119 | |||
120 | hwmon_dev = hwmon_device_register(&client->dev); | ||
121 | if (IS_ERR(hwmon_dev)) { | ||
122 | status = PTR_ERR(hwmon_dev); | ||
123 | goto exit_remove; | ||
124 | } | ||
125 | i2c_set_clientdata(client, hwmon_dev); | ||
126 | |||
127 | dev_info(&client->dev, "%s: sensor '%s'\n", | ||
128 | dev_name(hwmon_dev), client->name); | ||
129 | |||
130 | return 0; | ||
131 | |||
132 | exit_remove: | ||
133 | sysfs_remove_group(&client->dev.kobj, &lm73_group); | ||
134 | return status; | ||
135 | } | ||
136 | |||
137 | static int lm73_remove(struct i2c_client *client) | ||
138 | { | ||
139 | struct device *hwmon_dev = i2c_get_clientdata(client); | ||
140 | |||
141 | hwmon_device_unregister(hwmon_dev); | ||
142 | sysfs_remove_group(&client->dev.kobj, &lm73_group); | ||
143 | i2c_set_clientdata(client, NULL); | ||
144 | return 0; | ||
145 | } | ||
146 | |||
147 | static const struct i2c_device_id lm73_ids[] = { | ||
148 | { "lm73", lm73 }, | ||
149 | { /* LIST END */ } | ||
150 | }; | ||
151 | MODULE_DEVICE_TABLE(i2c, lm73_ids); | ||
152 | |||
153 | /* Return 0 if detection is successful, -ENODEV otherwise */ | ||
154 | static int lm73_detect(struct i2c_client *new_client, int kind, | ||
155 | struct i2c_board_info *info) | ||
156 | { | ||
157 | struct i2c_adapter *adapter = new_client->adapter; | ||
158 | u16 id; | ||
159 | u8 ctrl; | ||
160 | |||
161 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | | ||
162 | I2C_FUNC_SMBUS_WORD_DATA)) | ||
163 | return -ENODEV; | ||
164 | |||
165 | /* Check device ID */ | ||
166 | id = i2c_smbus_read_word_data(new_client, LM73_REG_ID); | ||
167 | ctrl = i2c_smbus_read_byte_data(new_client, LM73_REG_CTRL); | ||
168 | if ((id != LM73_ID) || (ctrl & 0x10)) | ||
169 | return -ENODEV; | ||
170 | |||
171 | strlcpy(info->type, "lm73", I2C_NAME_SIZE); | ||
172 | |||
173 | return 0; | ||
174 | } | ||
175 | |||
176 | static struct i2c_driver lm73_driver = { | ||
177 | .class = I2C_CLASS_HWMON, | ||
178 | .driver = { | ||
179 | .name = "lm73", | ||
180 | }, | ||
181 | .probe = lm73_probe, | ||
182 | .remove = lm73_remove, | ||
183 | .id_table = lm73_ids, | ||
184 | .detect = lm73_detect, | ||
185 | .address_data = &addr_data, | ||
186 | }; | ||
187 | |||
188 | /* module glue */ | ||
189 | |||
190 | static int __init sensors_lm73_init(void) | ||
191 | { | ||
192 | return i2c_add_driver(&lm73_driver); | ||
193 | } | ||
194 | |||
195 | static void __exit sensors_lm73_exit(void) | ||
196 | { | ||
197 | i2c_del_driver(&lm73_driver); | ||
198 | } | ||
199 | |||
200 | MODULE_AUTHOR("Guillaume Ligneul <guillaume.ligneul@gmail.com>"); | ||
201 | MODULE_DESCRIPTION("LM73 driver"); | ||
202 | MODULE_LICENSE("GPL"); | ||
203 | |||
204 | module_init(sensors_lm73_init); | ||
205 | module_exit(sensors_lm73_exit); | ||