summaryrefslogtreecommitdiff
path: root/packages/linux/linux-2.6.26/boc01/007-081216-lm73.patch
blob: 93d1a1812125598c20dbc5b86acf06df25c467d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
Index: linux-2.6.26-NEW/drivers/hwmon/Kconfig
===================================================================
--- linux-2.6.26-NEW.orig/drivers/hwmon/Kconfig
+++ linux-2.6.26-NEW/drivers/hwmon/Kconfig
@@ -390,6 +390,15 @@ config SENSORS_LM70
 	  This driver can also be built as a module.  If so, the module
 	  will be called lm70.
 
+config SENSORS_LM73
+	tristate "National Semiconductor LM73"
+	depends on I2C
+	help
+	  If you say yes here you get support for National Semiconductor LM73
+	  sensor chips
+	  This driver can also be built as a module.  If so, the module
+	  will be called lm73.
+
 config SENSORS_LM75
 	tristate "National Semiconductor LM75 and compatibles"
 	depends on I2C
Index: linux-2.6.26-NEW/drivers/hwmon/Makefile
===================================================================
--- linux-2.6.26-NEW.orig/drivers/hwmon/Makefile
+++ linux-2.6.26-NEW/drivers/hwmon/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_SENSORS_IT87)	+= it87.o
 obj-$(CONFIG_SENSORS_K8TEMP)	+= k8temp.o
 obj-$(CONFIG_SENSORS_LM63)	+= lm63.o
 obj-$(CONFIG_SENSORS_LM70)	+= lm70.o
+obj-$(CONFIG_SENSORS_LM73)	+= lm73.o
 obj-$(CONFIG_SENSORS_LM75)	+= lm75.o
 obj-$(CONFIG_SENSORS_LM77)	+= lm77.o
 obj-$(CONFIG_SENSORS_LM78)	+= lm78.o
Index: linux-2.6.26-NEW/drivers/hwmon/lm73.c
===================================================================
--- /dev/null
+++ linux-2.6.26-NEW/drivers/hwmon/lm73.c
@@ -0,0 +1,241 @@
+ /*
+ * LM73 Sensor driver
+ * Based on LM75
+ *
+ *
+ * Copyright (C) 2007, CenoSYS (www.cenosys.com).
+ * Guillaume Ligneul
+ * Guillaume.ligneul@gmail.com
+ *
+ * This software program is licensed subject to the GNU General Public License
+ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
+					0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(lm73);
+
+/* LM73 registers */
+#define LM73_REG_INPUT		0x00
+#define LM73_REG_CONF		0x01
+#define LM73_REG_T_HIGH		0x02
+#define LM73_REG_T_LOW		0x03
+
+static const u8 LM73_REG_TEMP[3] = {
+	LM73_REG_INPUT,		/* input */
+	LM73_REG_T_HIGH,	/* max */
+	LM73_REG_T_LOW,		/* min	*/
+};
+
+/* Each client has this additional data */
+struct lm73_data {
+	struct i2c_client	client;
+	struct device *hwmon_dev;
+	struct mutex		update_lock;
+	char			valid;		/* !=0 if following fields are valid */
+	unsigned long		last_updated;	/* In jiffies */
+	u16			temp[3];	/* Register values,
+						   0 = input
+						   1 = max
+						   2 = min */
+};
+
+static int lm73_attach_adapter(struct i2c_adapter *adapter);
+static int lm73_detect(struct i2c_adapter *adapter, int address, int kind);
+static int lm73_detach_client(struct i2c_client *client);
+static int lm73_read_value(struct i2c_client *client, u8 reg);
+static int lm73_write_value(struct i2c_client *client, u8 reg, short value);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver lm73_driver = {
+	.driver = {
+		.name	= "lm73",
+	},
+	.attach_adapter	= lm73_attach_adapter,
+	.detach_client	= lm73_detach_client,
+};
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *da,
+			 char *buf)
+{
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+	struct i2c_client *client = to_i2c_client(dev);
+	int iTemp = 0;
+
+	iTemp = lm73_read_value(client, LM73_REG_TEMP[attr->index]);
+
+	return sprintf(buf, "%d\n", iTemp);
+
+
+}
+
+static ssize_t set_temp(struct device *dev, struct device_attribute *da,
+			const char *buf, size_t count)
+{
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+	struct i2c_client *client = to_i2c_client(dev);
+	int nr = attr->index;
+
+	long tmp = simple_strtol(buf, NULL, 10);
+
+	lm73_write_value(client, LM73_REG_TEMP[nr], tmp);
+	return count;
+}
+
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+			show_temp, set_temp, 1);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
+			show_temp, set_temp, 2);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+
+static int lm73_attach_adapter(struct i2c_adapter *adapter)
+{
+	if (!(adapter->class & I2C_CLASS_HWMON))
+		return 0;
+
+	return i2c_probe(adapter, &addr_data, lm73_detect);
+}
+
+static struct attribute *lm73_attributes[] = {
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	&sensor_dev_attr_temp1_min.dev_attr.attr,
+
+	NULL
+};
+
+static const struct attribute_group lm73_group = {
+	.attrs = lm73_attributes,
+};
+
+/* This function is called by i2c_probe */
+static int lm73_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+	struct i2c_client *new_client;
+	struct lm73_data *data;
+	int err = 0;
+	const char *name = "";
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+				     I2C_FUNC_SMBUS_WORD_DATA))
+		goto exit;
+
+	if (!(data = kzalloc(sizeof(struct lm73_data), GFP_KERNEL))) {
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	new_client = &data->client;
+	i2c_set_clientdata(new_client, data);
+	new_client->addr = address;
+	new_client->adapter = adapter;
+	new_client->driver = &lm73_driver;
+	new_client->flags = 0;
+
+	name = "lm73";
+
+	/* Fill in the remaining client fields and put it into the global list */
+	strlcpy(new_client->name, name, I2C_NAME_SIZE);
+	data->valid = 0;
+	mutex_init(&data->update_lock);
+
+	/* Tell the I2C layer a new client has arrived */
+	if ((err = i2c_attach_client(new_client)))
+		goto exit_free;
+
+	/* Register sysfs hooks */
+	if ((err = sysfs_create_group(&new_client->dev.kobj, &lm73_group)))
+		goto exit_detach;
+
+	data->hwmon_dev = hwmon_device_register(&new_client->dev);
+	if (IS_ERR(data->hwmon_dev)) {
+		err = PTR_ERR(data->hwmon_dev);
+		goto exit_remove;
+	}
+
+	return 0;
+
+exit_remove:
+	sysfs_remove_group(&new_client->dev.kobj, &lm73_group);
+exit_detach:
+	i2c_detach_client(new_client);
+exit_free:
+	kfree(data);
+exit:
+	return err;
+}
+
+static int lm73_detach_client(struct i2c_client *client)
+{
+	struct lm73_data *data = i2c_get_clientdata(client);
+	hwmon_device_unregister(data->hwmon_dev);
+	sysfs_remove_group(&client->dev.kobj, &lm73_group);
+	i2c_detach_client(client);
+	kfree(data);
+	return 0;
+}
+
+static int lm73_read_value(struct i2c_client *client, u8 reg)
+{
+	short sVal;
+
+	if (reg == LM73_REG_CONF)
+		return i2c_smbus_read_byte_data(client, reg);
+	else
+	{
+		sVal = swab16(i2c_smbus_read_word_data(client, reg));
+		sVal = sVal >> 7;
+
+		if ( sVal & 0xFFFF ) {
+			sVal = sVal - 0x1;
+			sVal = ~sVal;
+
+			return -sVal;
+		}
+		else {
+			return sVal;
+		}
+	}
+}
+
+static int lm73_write_value(struct i2c_client *client, u8 reg, short value)
+{
+	if (reg == LM73_REG_CONF)
+		return i2c_smbus_write_byte_data(client, reg, value);
+	else
+	{
+		value = value<<7;
+		return i2c_smbus_write_word_data(client, reg, swab16(value));
+	}
+}
+
+static int __init sensors_lm73_init(void)
+{
+	return i2c_add_driver(&lm73_driver);
+}
+
+static void __exit sensors_lm73_exit(void)
+{
+	i2c_del_driver(&lm73_driver);
+}
+
+MODULE_AUTHOR("Ligneul Guillaume <guillaume.ligneul@gmail.com>");
+MODULE_DESCRIPTION("LM73 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_lm73_init);
+module_exit(sensors_lm73_exit);