path: root/packages/linux/linux-2.6.26/boc01/007-081216-lm73.patch

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);