Hi Greg,
Here is a port for the lm80 driver, which supports LM80 chips by
National Semiconductor. The port is mostly the work of Tiago Sousa,
which I reviewed and polished as necessary.
I leave it to you to decide wether you want to accept this driver in
Linux 2.6, or not. See my previous mail for reasons you could have not
to want it. (My opinion being: now that the driver has been ported,
let's include it.)
Thanks.
diff -ruN linux-2.6.3-rc2/drivers/i2c/chips.orig/Kconfig linux-2.6.3-rc2/drivers/i2c/chips/Kconfig
--- linux-2.6.3-rc2/drivers/i2c/chips.orig/Kconfig Tue Feb 10 19:09:09 2004
+++ linux-2.6.3-rc2/drivers/i2c/chips/Kconfig Tue Feb 10 22:37:17 2004
@@ -102,6 +102,17 @@
This driver can also be built as a module. If so, the module
will be called lm78.
+config SENSORS_LM80
+ tristate "National Semiconductor LM80"
+ depends on I2C && EXPERIMENTAL
+ select I2C_SENSOR
+ help
+ If you say yes here you get support for National Semiconductor
+ LM80 sensor chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called lm80.
+
config SENSORS_LM83
tristate "National Semiconductor LM83"
depends on I2C && EXPERIMENTAL
diff -ruN linux-2.6.3-rc2/drivers/i2c/chips.orig/Makefile linux-2.6.3-rc2/drivers/i2c/chips/Makefile
--- linux-2.6.3-rc2/drivers/i2c/chips.orig/Makefile Tue Feb 10 19:09:09 2004
+++ linux-2.6.3-rc2/drivers/i2c/chips/Makefile Tue Feb 10 22:37:17 2004
@@ -13,6 +13,7 @@
obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_LM75) += lm75.o
obj-$(CONFIG_SENSORS_LM78) += lm78.o
+obj-$(CONFIG_SENSORS_LM80) += lm80.o
obj-$(CONFIG_SENSORS_LM83) += lm83.o
obj-$(CONFIG_SENSORS_LM85) += lm85.o
obj-$(CONFIG_SENSORS_LM90) += lm90.o
diff -ruN linux-2.6.3-rc2/drivers/i2c/chips.orig/lm80.c linux-2.6.3-rc2/drivers/i2c/chips/lm80.c
--- linux-2.6.3-rc2/drivers/i2c/chips.orig/lm80.c Thu Jan 1 01:00:00 1970
+++ linux-2.6.3-rc2/drivers/i2c/chips/lm80.c Wed Feb 11 20:40:09 2004
@@ -0,0 +1,567 @@
+/*
+ * lm80.c - From lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 1998, 1999 Frodo Looijaard <frodol at dds.nl>
+ * and Philip Edelbrock <phil at netroedge.com>
+ *
+ * Ported to Linux 2.6 by Tiago Sousa <mirage at kaotik.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#ifdef CONFIG_I2C_DEBUG_CHIP
+#define DEBUG 1
+#endif
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { 0x28, 0x2f, I2C_CLIENT_END };
+static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
+static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
+
+/* Insmod parameters */
+SENSORS_INSMOD_1(lm80);
+
+/* Many LM80 constants specified below */
+
+/* The LM80 registers */
+#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
+#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
+#define LM80_REG_IN(nr) (0x20 + (nr))
+
+#define LM80_REG_FAN1_MIN 0x3c
+#define LM80_REG_FAN2_MIN 0x3d
+#define LM80_REG_FAN1 0x28
+#define LM80_REG_FAN2 0x29
+
+#define LM80_REG_TEMP 0x27
+#define LM80_REG_TEMP_HOT_MAX 0x38
+#define LM80_REG_TEMP_HOT_HYST 0x39
+#define LM80_REG_TEMP_OS_MAX 0x3a
+#define LM80_REG_TEMP_OS_HYST 0x3b
+
+#define LM80_REG_CONFIG 0x00
+#define LM80_REG_ALARM1 0x01
+#define LM80_REG_ALARM2 0x02
+#define LM80_REG_MASK1 0x03
+#define LM80_REG_MASK2 0x04
+#define LM80_REG_FANDIV 0x05
+#define LM80_REG_RES 0x06
+
+
+/* Conversions. Rounding and limit checking is only done on the TO_REG
+ variants. Note that you should be a bit careful with which arguments
+ these macros are called: arguments may be evaluated more than once.
+ Fixing this is just not worth it. */
+
+#define IN_TO_REG(val) (SENSORS_LIMIT((val)/10,0,255))
+#define IN_FROM_REG(val) ((val)*10)
+
+static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
+{
+ if (rpm == 0)
+ return 255;
+ rpm = SENSORS_LIMIT(rpm, 1, 1000000);
+ return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
+}
+
+#define FAN_FROM_REG(val,div) ((val)==0?-1:\
+ (val)==255?0:1350000/((div)*(val)))
+
+static inline long TEMP_FROM_REG(u16 temp)
+{
+ long res;
+
+ temp >>= 4;
+ if (temp < 0x0800)
+ res = 625 * (long) temp;
+ else
+ res = ((long) temp - 0x01000) * 625;
+
+ return res / 10;
+}
+
+#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
+
+#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
+ ((val)-500)/1000:((val)+500)/1000,0,255)
+
+#define ALARMS_FROM_REG(val) (val)
+
+#define DIV_FROM_REG(val) (1 << (val))
+#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct lm80_data {
+ struct semaphore update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 in[7]; /* Register value */
+ u8 in_max[7]; /* Register value */
+ u8 in_min[7]; /* Register value */
+ u8 fan[2]; /* Register value */
+ u8 fan_min[2]; /* Register value */
+ u8 fan_div[2]; /* Register encoding, shifted right */
+ u16 temp; /* Register values, shifted right */
+ u8 temp_hot_max; /* Register value */
+ u8 temp_hot_hyst; /* Register value */
+ u8 temp_os_max; /* Register value */
+ u8 temp_os_hyst; /* Register value */
+ u16 alarms; /* Register encoding, combined */
+};
+
+/*
+ * Functions declaration
+ */
+
+static int lm80_attach_adapter(struct i2c_adapter *adapter);
+static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
+static void lm80_init_client(struct i2c_client *client);
+static int lm80_detach_client(struct i2c_client *client);
+static void lm80_update_client(struct i2c_client *client);
+static int lm80_read_value(struct i2c_client *client, u8 reg);
+static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
+
+/*
+ * Internal variables
+ */
+
+static int lm80_id = 0;
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver lm80_driver = {
+ .owner = THIS_MODULE,
+ .name = "lm80",
+ .id = I2C_DRIVERID_LM80,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = lm80_attach_adapter,
+ .detach_client = lm80_detach_client,
+};
+
+/*
+ * Sysfs stuff
+ */
+
+#define show_in(suffix, value) \
+static ssize_t show_in_##suffix(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ lm80_update_client(client); \
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
+}
+show_in(min0, in_min[0]);
+show_in(min1, in_min[1]);
+show_in(min2, in_min[2]);
+show_in(min3, in_min[3]);
+show_in(min4, in_min[4]);
+show_in(min5, in_min[5]);
+show_in(min6, in_min[6]);
+show_in(max0, in_max[0]);
+show_in(max1, in_max[1]);
+show_in(max2, in_max[2]);
+show_in(max3, in_max[3]);
+show_in(max4, in_max[4]);
+show_in(max5, in_max[5]);
+show_in(max6, in_max[6]);
+show_in(input0, in[0]);
+show_in(input1, in[1]);
+show_in(input2, in[2]);
+show_in(input3, in[3]);
+show_in(input4, in[4]);
+show_in(input5, in[5]);
+show_in(input6, in[6]);
+
+#define set_in(suffix, value, reg) \
+static ssize_t set_in_##suffix(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ long val = simple_strtol(buf, NULL, 10); \
+ data->value = IN_TO_REG(val); \
+ lm80_write_value(client, reg, data->value); \
+ return count; \
+}
+set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
+set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
+set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
+set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
+set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
+set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
+set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
+set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
+set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
+set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
+set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
+set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
+set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
+set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
+
+#define show_fan(suffix, value, div) \
+static ssize_t show_fan_##suffix(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ lm80_update_client(client); \
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
+ DIV_FROM_REG(data->div))); \
+}
+show_fan(min1, fan_min[0], fan_div[0]);
+show_fan(min2, fan_min[1], fan_div[1]);
+show_fan(input1, fan[0], fan_div[0]);
+show_fan(input2, fan[1], fan_div[1]);
+
+#define show_fan_div(suffix, value) \
+static ssize_t show_fan_div##suffix(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ lm80_update_client(client); \
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
+}
+show_fan_div(1, fan_div[0]);
+show_fan_div(2, fan_div[1]);
+
+#define set_fan(suffix, value, reg, div) \
+static ssize_t set_fan_##suffix(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ long val = simple_strtoul(buf, NULL, 10); \
+ data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
+ lm80_write_value(client, reg, data->value); \
+ return count; \
+}
+set_fan(min1, fan_min[0], LM80_REG_FAN1_MIN, fan_div[0]);
+set_fan(min2, fan_min[1], LM80_REG_FAN2_MIN, fan_div[1]);
+
+static ssize_t show_temp_input1(struct device *dev, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm80_data *data = i2c_get_clientdata(client);
+ lm80_update_client(client);
+ return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
+}
+
+#define show_temp(suffix, value) \
+static ssize_t show_temp_##suffix(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ lm80_update_client(client); \
+ return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
+}
+show_temp(hot_max, temp_hot_max);
+show_temp(hot_hyst, temp_hot_hyst);
+show_temp(os_max, temp_os_max);
+show_temp(os_hyst, temp_os_hyst);
+
+#define set_temp(suffix, value, reg) \
+static ssize_t set_temp_##suffix(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm80_data *data = i2c_get_clientdata(client); \
+ long val = simple_strtoul(buf, NULL, 10); \
+ data->value = TEMP_LIMIT_TO_REG(val); \
+ lm80_write_value(client, reg, data->value); \
+ return count; \
+}
+set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
+set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
+set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
+set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
+
+static ssize_t show_alarms(struct device *dev, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm80_data *data = i2c_get_clientdata(client);
+ lm80_update_client(client);
+ return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->alarms));
+}
+
+static DEVICE_ATTR(in_min0, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
+static DEVICE_ATTR(in_min1, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
+static DEVICE_ATTR(in_min2, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
+static DEVICE_ATTR(in_min3, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
+static DEVICE_ATTR(in_min4, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
+static DEVICE_ATTR(in_min5, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
+static DEVICE_ATTR(in_min6, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
+static DEVICE_ATTR(in_max0, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
+static DEVICE_ATTR(in_max1, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
+static DEVICE_ATTR(in_max2, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
+static DEVICE_ATTR(in_max3, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
+static DEVICE_ATTR(in_max4, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
+static DEVICE_ATTR(in_max5, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
+static DEVICE_ATTR(in_max6, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
+static DEVICE_ATTR(in_input0, S_IRUGO, show_in_input0, NULL);
+static DEVICE_ATTR(in_input1, S_IRUGO, show_in_input1, NULL);
+static DEVICE_ATTR(in_input2, S_IRUGO, show_in_input2, NULL);
+static DEVICE_ATTR(in_input3, S_IRUGO, show_in_input3, NULL);
+static DEVICE_ATTR(in_input4, S_IRUGO, show_in_input4, NULL);
+static DEVICE_ATTR(in_input5, S_IRUGO, show_in_input5, NULL);
+static DEVICE_ATTR(in_input6, S_IRUGO, show_in_input6, NULL);
+static DEVICE_ATTR(fan_min1, S_IWUSR | S_IRUGO, show_fan_min1,
+ set_fan_min1);
+static DEVICE_ATTR(fan_min2, S_IWUSR | S_IRUGO, show_fan_min2,
+ set_fan_min2);
+static DEVICE_ATTR(fan_input1, S_IRUGO, show_fan_input1, NULL);
+static DEVICE_ATTR(fan_input2, S_IRUGO, show_fan_input2, NULL);
+static DEVICE_ATTR(fan_div1, S_IRUGO, show_fan_div1, NULL);
+static DEVICE_ATTR(fan_div2, S_IRUGO, show_fan_div2, NULL);
+static DEVICE_ATTR(temp_input1, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp_max1, S_IWUSR | S_IRUGO, show_temp_hot_max,
+ set_temp_hot_max);
+static DEVICE_ATTR(temp_max1_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
+ set_temp_hot_hyst);
+static DEVICE_ATTR(temp_crit1, S_IWUSR | S_IRUGO, show_temp_os_max,
+ set_temp_os_max);
+static DEVICE_ATTR(temp_crit1_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
+ set_temp_os_hyst);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+/*
+ * Real code
+ */
+
+static int lm80_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_ADAP_CLASS_SMBUS))
+ return 0;
+ return i2c_detect(adapter, &addr_data, lm80_detect);
+}
+
+int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ int i, cur;
+ struct i2c_client *new_client;
+ struct lm80_data *data;
+ int err = 0;
+ const char *name;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ /* OK. For now, we presume we have a valid client. We now create the
+ client structure, even though we cannot fill it completely yet.
+ But it allows us to access lm80_{read,write}_value. */
+ if (!(new_client = kmalloc(sizeof(struct i2c_client) +
+ sizeof(struct lm80_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ memset(new_client, 0x00, sizeof(struct i2c_client) +
+ sizeof(struct lm80_data));
+
+ data = (struct lm80_data *) (new_client + 1);
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &lm80_driver;
+ new_client->flags = 0;
+
+ /* Now, we do the remaining detection. It is lousy. */
+ if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
+ goto error_free;
+ for (i = 0x2a; i <= 0x3d; i++) {
+ cur = i2c_smbus_read_byte_data(new_client, i);
+ if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
+ || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
+ || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
+ goto error_free;
+ }
+
+ /* Determine the chip type - only one kind supported! */
+ kind = lm80;
+ name = "lm80";
+
+ /* Fill in the remaining client fields and put it into the global list */
+ strlcpy(new_client->name, name, I2C_NAME_SIZE);
+
+ new_client->id = lm80_id++;
+ data->valid = 0;
+ init_MUTEX(&data->update_lock);
+
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(new_client)))
+ goto error_free;
+
+ /* Initialize the LM80 chip */
+ lm80_init_client(new_client);
+
+ /* Register sysfs hooks */
+ device_create_file(&new_client->dev, &dev_attr_in_min0);
+ device_create_file(&new_client->dev, &dev_attr_in_min1);
+ device_create_file(&new_client->dev, &dev_attr_in_min2);
+ device_create_file(&new_client->dev, &dev_attr_in_min3);
+ device_create_file(&new_client->dev, &dev_attr_in_min4);
+ device_create_file(&new_client->dev, &dev_attr_in_min5);
+ device_create_file(&new_client->dev, &dev_attr_in_min6);
+ device_create_file(&new_client->dev, &dev_attr_in_max0);
+ device_create_file(&new_client->dev, &dev_attr_in_max1);
+ device_create_file(&new_client->dev, &dev_attr_in_max2);
+ device_create_file(&new_client->dev, &dev_attr_in_max3);
+ device_create_file(&new_client->dev, &dev_attr_in_max4);
+ device_create_file(&new_client->dev, &dev_attr_in_max5);
+ device_create_file(&new_client->dev, &dev_attr_in_max6);
+ device_create_file(&new_client->dev, &dev_attr_in_input0);
+ device_create_file(&new_client->dev, &dev_attr_in_input1);
+ device_create_file(&new_client->dev, &dev_attr_in_input2);
+ device_create_file(&new_client->dev, &dev_attr_in_input3);
+ device_create_file(&new_client->dev, &dev_attr_in_input4);
+ device_create_file(&new_client->dev, &dev_attr_in_input5);
+ device_create_file(&new_client->dev, &dev_attr_in_input6);
+ device_create_file(&new_client->dev, &dev_attr_fan_min1);
+ device_create_file(&new_client->dev, &dev_attr_fan_min2);
+ device_create_file(&new_client->dev, &dev_attr_fan_input1);
+ device_create_file(&new_client->dev, &dev_attr_fan_input2);
+ device_create_file(&new_client->dev, &dev_attr_fan_div1);
+ device_create_file(&new_client->dev, &dev_attr_fan_div2);
+ device_create_file(&new_client->dev, &dev_attr_temp_input1);
+ device_create_file(&new_client->dev, &dev_attr_temp_max1);
+ device_create_file(&new_client->dev, &dev_attr_temp_max1_hyst);
+ device_create_file(&new_client->dev, &dev_attr_temp_crit1);
+ device_create_file(&new_client->dev, &dev_attr_temp_crit1_hyst);
+ device_create_file(&new_client->dev, &dev_attr_alarms);
+
+ return 0;
+
+error_free:
+ kfree(new_client);
+exit:
+ return err;
+}
+
+static int lm80_detach_client(struct i2c_client *client)
+{
+ int err;
+
+ if ((err = i2c_detach_client(client))) {
+ dev_err(&client->dev, "Client deregistration failed, "
+ "client not detached.\n");
+ return err;
+ }
+
+ kfree(client);
+ return 0;
+}
+
+static int lm80_read_value(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/* Called when we have found a new LM80. */
+static void lm80_init_client(struct i2c_client *client)
+{
+ /* Reset all except Watchdog values and last conversion values
+ This sets fan-divs to 2, among others. This makes most other
+ initializations unnecessary */
+ lm80_write_value(client, LM80_REG_CONFIG, 0x80);
+ /* Set 11-bit temperature resolution */
+ lm80_write_value(client, LM80_REG_RES, 0x08);
+
+ /* Start monitoring */
+ lm80_write_value(client, LM80_REG_CONFIG, 0x01);
+}
+
+static void lm80_update_client(struct i2c_client *client)
+{
+ struct lm80_data *data = i2c_get_clientdata(client);
+ int i;
+
+ down(&data->update_lock);
+
+ if ((jiffies - data->last_updated > 2 * HZ) ||
+ (jiffies < data->last_updated) || !data->valid) {
+
+ dev_dbg(&client->dev, "Starting lm80 update\n");
+ for (i = 0; i <= 6; i++) {
+ data->in[i] =
+ lm80_read_value(client, LM80_REG_IN(i));
+ data->in_min[i] =
+ lm80_read_value(client, LM80_REG_IN_MIN(i));
+ data->in_max[i] =
+ lm80_read_value(client, LM80_REG_IN_MAX(i));
+ }
+ data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
+ data->fan_min[0] =
+ lm80_read_value(client, LM80_REG_FAN1_MIN);
+ data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
+ data->fan_min[1] =
+ lm80_read_value(client, LM80_REG_FAN2_MIN);
+
+ data->temp =
+ (lm80_read_value(client, LM80_REG_TEMP) << 8) |
+ (lm80_read_value(client, LM80_REG_RES) & 0xf0);
+ data->temp_os_max =
+ lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
+ data->temp_os_hyst =
+ lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
+ data->temp_hot_max =
+ lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
+ data->temp_hot_hyst =
+ lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
+
+ i = lm80_read_value(client, LM80_REG_FANDIV);
+ data->fan_div[0] = (i >> 2) & 0x03;
+ data->fan_div[1] = (i >> 4) & 0x03;
+ data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
+ (lm80_read_value(client, LM80_REG_ALARM2) << 8);
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+}
+
+static int __init sensors_lm80_init(void)
+{
+ return i2c_add_driver(&lm80_driver);
+}
+
+static void __exit sensors_lm80_exit(void)
+{
+ i2c_del_driver(&lm80_driver);
+}
+
+MODULE_AUTHOR("Frodo Looijaard <frodol at dds.nl> and "
+ "Philip Edelbrock <phil at netroedge.com>");
+MODULE_DESCRIPTION("LM80 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_lm80_init);
+module_exit(sensors_lm80_exit);
--
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/
