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SubjectRe: [PATCH] i2c driver fixes for 2.6.1
Date
From
ChangeSet 1.1474.98.10, 2004/01/14 11:27:32-08:00, khali@linux-fr.org

[PATCH] I2C: New chip driver: lm90

This is my LM90/ADM1032 i2c chip driver ported to Linux 2.6


drivers/i2c/chips/Kconfig | 11
drivers/i2c/chips/Makefile | 1
drivers/i2c/chips/lm90.c | 520 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/i2c-id.h | 1
4 files changed, 533 insertions(+)


diff -Nru a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
--- a/drivers/i2c/chips/Kconfig Mon Jan 19 15:31:33 2004
+++ b/drivers/i2c/chips/Kconfig Mon Jan 19 15:31:33 2004
@@ -101,6 +101,17 @@
This driver can also be built as a module. If so, the module
will be called lm85.

+config SENSORS_LM90
+ tristate "National Semiconductor LM90 and compatibles"
+ depends on I2C && EXPERIMENTAL
+ select I2C_SENSOR
+ help
+ If you say yes here you get support for National Semiconductor LM90
+ and Analog Devices ADM1032 sensor chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called lm90.
+
config SENSORS_VIA686A
tristate "VIA686A"
depends on I2C && EXPERIMENTAL
diff -Nru a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
--- a/drivers/i2c/chips/Makefile Mon Jan 19 15:31:33 2004
+++ b/drivers/i2c/chips/Makefile Mon Jan 19 15:31:33 2004
@@ -13,4 +13,5 @@
obj-$(CONFIG_SENSORS_LM78) += lm78.o
obj-$(CONFIG_SENSORS_LM83) += lm83.o
obj-$(CONFIG_SENSORS_LM85) += lm85.o
+obj-$(CONFIG_SENSORS_LM90) += lm90.o
obj-$(CONFIG_SENSORS_VIA686A) += via686a.o
diff -Nru a/drivers/i2c/chips/lm90.c b/drivers/i2c/chips/lm90.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/i2c/chips/lm90.c Mon Jan 19 15:31:33 2004
@@ -0,0 +1,520 @@
+/*
+ * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 2003 Jean Delvare <khali@linux-fr.org>
+ *
+ * Based on the lm83 driver. The LM90 is a sensor chip made by National
+ * Semiconductor. It reports up to two temperatures (its own plus up to
+ * one external one) with a 0.125 deg resolution (1 deg for local
+ * temperature) and a 3-4 deg accuracy. Complete datasheet can be
+ * obtained from National's website at:
+ * http://www.national.com/pf/LM/LM90.html
+ *
+ * This driver also supports the ADM1032, a sensor chip made by Analog
+ * Devices. That chip is similar to the LM90, with a few differences
+ * that are not handled by this driver. Complete datasheet can be
+ * obtained from Analog's website at:
+ * http://products.analog.com/products/info.asp?product=ADM1032
+ *
+ * Since the LM90 was the first chipset supported by this driver, most
+ * comments will refer to this chipset, but are actually general and
+ * concern all supported chipsets, unless mentioned otherwise.
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+
+/*
+ * Addresses to scan
+ * Address is fully defined internally and cannot be changed.
+ */
+
+static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { 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_2(lm90, adm1032);
+
+/*
+ * The LM90 registers
+ */
+
+#define LM90_REG_R_MAN_ID 0xFE
+#define LM90_REG_R_CHIP_ID 0xFF
+#define LM90_REG_R_CONFIG1 0x03
+#define LM90_REG_W_CONFIG1 0x09
+#define LM90_REG_R_CONFIG2 0xBF
+#define LM90_REG_W_CONFIG2 0xBF
+#define LM90_REG_R_CONVRATE 0x04
+#define LM90_REG_W_CONVRATE 0x0A
+#define LM90_REG_R_STATUS 0x02
+#define LM90_REG_R_LOCAL_TEMP 0x00
+#define LM90_REG_R_LOCAL_HIGH 0x05
+#define LM90_REG_W_LOCAL_HIGH 0x0B
+#define LM90_REG_R_LOCAL_LOW 0x06
+#define LM90_REG_W_LOCAL_LOW 0x0C
+#define LM90_REG_R_LOCAL_CRIT 0x20
+#define LM90_REG_W_LOCAL_CRIT 0x20
+#define LM90_REG_R_REMOTE_TEMPH 0x01
+#define LM90_REG_R_REMOTE_TEMPL 0x10
+#define LM90_REG_R_REMOTE_OFFSH 0x11
+#define LM90_REG_W_REMOTE_OFFSH 0x11
+#define LM90_REG_R_REMOTE_OFFSL 0x12
+#define LM90_REG_W_REMOTE_OFFSL 0x12
+#define LM90_REG_R_REMOTE_HIGHH 0x07
+#define LM90_REG_W_REMOTE_HIGHH 0x0D
+#define LM90_REG_R_REMOTE_HIGHL 0x13
+#define LM90_REG_W_REMOTE_HIGHL 0x13
+#define LM90_REG_R_REMOTE_LOWH 0x08
+#define LM90_REG_W_REMOTE_LOWH 0x0E
+#define LM90_REG_R_REMOTE_LOWL 0x14
+#define LM90_REG_W_REMOTE_LOWL 0x14
+#define LM90_REG_R_REMOTE_CRIT 0x19
+#define LM90_REG_W_REMOTE_CRIT 0x19
+#define LM90_REG_R_TCRIT_HYST 0x21
+#define LM90_REG_W_TCRIT_HYST 0x21
+
+/*
+ * Conversions and various macros
+ * The LM90 uses signed 8-bit values for the local temperatures,
+ * and signed 11-bit values for the remote temperatures (except
+ * T_CRIT). Note that TEMP2_TO_REG does not round values, but
+ * stick to the nearest lower value instead. Fixing it is just
+ * not worth it.
+ */
+
+#define TEMP1_FROM_REG(val) ((val & 0x80 ? val-0x100 : val) * 1000)
+#define TEMP1_TO_REG(val) ((val < 0 ? val+0x100*1000 : val) / 1000)
+#define TEMP2_FROM_REG(val) (((val & 0x8000 ? val-0x10000 : val) >> 5) * 125)
+#define TEMP2_TO_REG(val) ((((val / 125) << 5) + (val < 0 ? 0x10000 : 0)) & 0xFFE0)
+#define HYST_FROM_REG(val) (val * 1000)
+#define HYST_TO_REG(val) (val <= 0 ? 0 : val >= 31000 ? 31 : val / 1000)
+
+/*
+ * Functions declaration
+ */
+
+static int lm90_attach_adapter(struct i2c_adapter *adapter);
+static int lm90_detect(struct i2c_adapter *adapter, int address,
+ int kind);
+static void lm90_init_client(struct i2c_client *client);
+static int lm90_detach_client(struct i2c_client *client);
+static void lm90_update_client(struct i2c_client *client);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver lm90_driver = {
+ .owner = THIS_MODULE,
+ .name = "lm90",
+ .id = I2C_DRIVERID_LM90,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = lm90_attach_adapter,
+ .detach_client = lm90_detach_client,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct lm90_data {
+ struct semaphore update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* registers values */
+ u8 temp_input1, temp_low1, temp_high1; /* local */
+ u16 temp_input2, temp_low2, temp_high2; /* remote, combined */
+ u8 temp_crit1, temp_crit2;
+ u8 temp_hyst;
+ u16 alarms; /* bitvector, combined */
+};
+
+/*
+ * Internal variables
+ */
+
+static int lm90_id = 0;
+
+/*
+ * Sysfs stuff
+ */
+
+#define show_temp(value, converter) \
+static ssize_t show_##value(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm90_data *data = i2c_get_clientdata(client); \
+ lm90_update_client(client); \
+ return sprintf(buf, "%d\n", converter(data->value)); \
+}
+show_temp(temp_input1, TEMP1_FROM_REG);
+show_temp(temp_input2, TEMP2_FROM_REG);
+show_temp(temp_low1, TEMP1_FROM_REG);
+show_temp(temp_low2, TEMP2_FROM_REG);
+show_temp(temp_high1, TEMP1_FROM_REG);
+show_temp(temp_high2, TEMP2_FROM_REG);
+show_temp(temp_crit1, TEMP1_FROM_REG);
+show_temp(temp_crit2, TEMP1_FROM_REG);
+
+#define set_temp1(value, reg) \
+static ssize_t set_##value(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm90_data *data = i2c_get_clientdata(client); \
+ data->value = TEMP1_TO_REG(simple_strtol(buf, NULL, 10)); \
+ i2c_smbus_write_byte_data(client, reg, data->value); \
+ return count; \
+}
+#define set_temp2(value, regh, regl) \
+static ssize_t set_##value(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm90_data *data = i2c_get_clientdata(client); \
+ data->value = TEMP2_TO_REG(simple_strtol(buf, NULL, 10)); \
+ i2c_smbus_write_byte_data(client, regh, data->value >> 8); \
+ i2c_smbus_write_byte_data(client, regl, data->value & 0xff); \
+ return count; \
+}
+set_temp1(temp_low1, LM90_REG_W_LOCAL_LOW);
+set_temp2(temp_low2, LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL);
+set_temp1(temp_high1, LM90_REG_W_LOCAL_HIGH);
+set_temp2(temp_high2, LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL);
+set_temp1(temp_crit1, LM90_REG_W_LOCAL_CRIT);
+set_temp1(temp_crit2, LM90_REG_W_REMOTE_CRIT);
+
+#define show_temp_hyst(value, basereg) \
+static ssize_t show_##value(struct device *dev, char *buf) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm90_data *data = i2c_get_clientdata(client); \
+ lm90_update_client(client); \
+ return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->basereg) \
+ - HYST_FROM_REG(data->temp_hyst)); \
+}
+show_temp_hyst(temp_hyst1, temp_crit1);
+show_temp_hyst(temp_hyst2, temp_crit2);
+
+static ssize_t set_temp_hyst1(struct device *dev, const char *buf,
+ size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm90_data *data = i2c_get_clientdata(client);
+ int hyst = TEMP1_FROM_REG(data->temp_crit1) -
+ simple_strtol(buf, NULL, 10);
+ i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
+ HYST_TO_REG(hyst));
+ return count;
+}
+
+static ssize_t show_alarms(struct device *dev, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm90_data *data = i2c_get_clientdata(client);
+ lm90_update_client(client);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+
+static DEVICE_ATTR(temp_input1, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp_input2, S_IRUGO, show_temp_input2, NULL);
+static DEVICE_ATTR(temp_min1, S_IWUSR | S_IRUGO, show_temp_low1,
+ set_temp_low1);
+static DEVICE_ATTR(temp_min2, S_IWUSR | S_IRUGO, show_temp_low2,
+ set_temp_low2);
+static DEVICE_ATTR(temp_max1, S_IWUSR | S_IRUGO, show_temp_high1,
+ set_temp_high1);
+static DEVICE_ATTR(temp_max2, S_IWUSR | S_IRUGO, show_temp_high2,
+ set_temp_high2);
+static DEVICE_ATTR(temp_crit1, S_IWUSR | S_IRUGO, show_temp_crit1,
+ set_temp_crit1);
+static DEVICE_ATTR(temp_crit2, S_IWUSR | S_IRUGO, show_temp_crit2,
+ set_temp_crit2);
+static DEVICE_ATTR(temp_hyst1, S_IWUSR | S_IRUGO, show_temp_hyst1,
+ set_temp_hyst1);
+static DEVICE_ATTR(temp_hyst2, S_IRUGO, show_temp_hyst2, NULL);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+/*
+ * Real code
+ */
+
+static int lm90_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_ADAP_CLASS_SMBUS))
+ return 0;
+ return i2c_detect(adapter, &addr_data, lm90_detect);
+}
+
+/*
+ * The following function does more than just detection. If detection
+ * succeeds, it also registers the new chip.
+ */
+static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *new_client;
+ struct lm90_data *data;
+ int err = 0;
+ const char *name = "";
+ u8 reg_config1=0, reg_convrate=0;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ if (!(new_client = kmalloc(sizeof(struct i2c_client) +
+ sizeof(struct lm90_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ memset(new_client, 0x00, sizeof(struct i2c_client) +
+ sizeof(struct lm90_data));
+
+ /* The LM90-specific data is placed right after the common I2C
+ * client data. */
+ data = (struct lm90_data *) (new_client + 1);
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &lm90_driver;
+ new_client->flags = 0;
+
+ /*
+ * Now we do the remaining detection. A negative kind means that
+ * the driver was loaded with no force parameter (default), so we
+ * must both detect and identify the chip. A zero kind means that
+ * the driver was loaded with the force parameter, the detection
+ * step shall be skipped. A positive kind means that the driver
+ * was loaded with the force parameter and a given kind of chip is
+ * requested, so both the detection and the identification steps
+ * are skipped.
+ */
+ if (kind < 0) { /* detection */
+ reg_config1 = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONFIG1);
+ reg_convrate = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONVRATE);
+
+ if ((reg_config1 & 0x2A) != 0x00
+ || reg_convrate > 0x0A) {
+ dev_dbg(&client->dev,
+ "LM90 detection failed at 0x%02x.\n"
+ address);
+ goto exit_free;
+ }
+ }
+
+ if (kind <= 0) { /* identification */
+ u8 man_id, chip_id;
+
+ man_id = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_MAN_ID);
+ chip_id = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CHIP_ID);
+
+ if (man_id == 0x01) { /* National Semiconductor */
+ if (chip_id >= 0x21 && chip_id < 0x30 /* LM90 */
+ && (kind == 0 /* skip detection */
+ || ((i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONFIG2) & 0xF8) == 0x00
+ && reg_convrate <= 0x09))) {
+ kind = lm90;
+ name = "lm90";
+ }
+ }
+ else if (man_id == 0x41) { /* Analog Devices */
+ if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
+ && (kind == 0 /* skip detection */
+ || (reg_config1 & 0x3F) == 0x00)) {
+ kind = adm1032;
+ name = "adm1032";
+ }
+ }
+
+ if (kind <= 0) { /* identification failed */
+ dev_info(&adapter->dev,
+ "Unsupported chip (man_id=0x%02X, "
+ "chip_id=0x%02X).\n", man_id, chip_id);
+ goto exit_free;
+ }
+ }
+
+ /* We can fill in the remaining client fields */
+ strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ new_client->id = lm90_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 exit_free;
+
+ /* Initialize the LM90 chip */
+ lm90_init_client(new_client);
+
+ /* Register sysfs hooks */
+ device_create_file(&new_client->dev, &dev_attr_temp_input1);
+ device_create_file(&new_client->dev, &dev_attr_temp_input2);
+ device_create_file(&new_client->dev, &dev_attr_temp_min1);
+ device_create_file(&new_client->dev, &dev_attr_temp_min2);
+ device_create_file(&new_client->dev, &dev_attr_temp_max1);
+ device_create_file(&new_client->dev, &dev_attr_temp_max2);
+ device_create_file(&new_client->dev, &dev_attr_temp_crit1);
+ device_create_file(&new_client->dev, &dev_attr_temp_crit2);
+ device_create_file(&new_client->dev, &dev_attr_temp_hyst1);
+ device_create_file(&new_client->dev, &dev_attr_temp_hyst2);
+ device_create_file(&new_client->dev, &dev_attr_alarms);
+
+ return 0;
+
+exit_free:
+ kfree(new_client);
+exit:
+ return err;
+}
+
+static void lm90_init_client(struct i2c_client *client)
+{
+ u8 config;
+
+ /*
+ * Start the conversions.
+ */
+ i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
+ 5); /* 2 Hz */
+ config = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
+ if (config & 0x40)
+ i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
+ config & 0xBF); /* run */
+}
+
+static int lm90_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 void lm90_update_client(struct i2c_client *client)
+{
+ struct lm90_data *data = i2c_get_clientdata(client);
+
+ down(&data->update_lock);
+
+ if ((jiffies - data->last_updated > HZ * 2) ||
+ (jiffies < data->last_updated) ||
+ !data->valid) {
+ u8 oldh, newh;
+
+ dev_dbg(&client->dev, "Updating lm90 data.\n");
+ data->temp_input1 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_LOCAL_TEMP);
+ data->temp_high1 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_LOCAL_HIGH);
+ data->temp_low1 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_LOCAL_LOW);
+ data->temp_crit1 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_LOCAL_CRIT);
+ data->temp_crit2 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_CRIT);
+ data->temp_hyst = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_TCRIT_HYST);
+
+ /*
+ * There is a trick here. We have to read two registers to
+ * have the remote sensor temperature, but we have to beware
+ * a conversion could occur inbetween the readings. The
+ * datasheet says we should either use the one-shot
+ * conversion register, which we don't want to do (disables
+ * hardware monitoring) or monitor the busy bit, which is
+ * impossible (we can't read the values and monitor that bit
+ * at the exact same time). So the solution used here is to
+ * read the high byte once, then the low byte, then the high
+ * byte again. If the new high byte matches the old one,
+ * then we have a valid reading. Else we have to read the low
+ * byte again, and now we believe we have a correct reading.
+ */
+ oldh = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_TEMPH);
+ data->temp_input2 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_TEMPL);
+ newh = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_TEMPH);
+ if (newh != oldh) {
+ data->temp_input2 = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_TEMPL);
+#ifdef DEBUG
+ oldh = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_TEMPH);
+ /* oldh is actually newer */
+ if (newh != oldh)
+ dev_warn(&client->dev, "Remote temperature may be "
+ "wrong.\n");
+#endif
+ }
+ data->temp_input2 |= (newh << 8);
+
+ data->temp_high2 = (i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_HIGHH) << 8) +
+ i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_HIGHL);
+ data->temp_low2 = (i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_LOWH) << 8) +
+ i2c_smbus_read_byte_data(client,
+ LM90_REG_R_REMOTE_LOWL);
+ data->alarms = i2c_smbus_read_byte_data(client,
+ LM90_REG_R_STATUS);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+}
+
+static int __init sensors_lm90_init(void)
+{
+ return i2c_add_driver(&lm90_driver);
+}
+
+static void __exit sensors_lm90_exit(void)
+{
+ i2c_del_driver(&lm90_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("LM90/ADM1032 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_lm90_init);
+module_exit(sensors_lm90_exit);
diff -Nru a/include/linux/i2c-id.h b/include/linux/i2c-id.h
--- a/include/linux/i2c-id.h Mon Jan 19 15:31:33 2004
+++ b/include/linux/i2c-id.h Mon Jan 19 15:31:33 2004
@@ -154,6 +154,7 @@
#define I2C_DRIVERID_W83627HF 1038
#define I2C_DRIVERID_LM85 1039
#define I2C_DRIVERID_LM83 1040
+#define I2C_DRIVERID_LM90 1042
#define I2C_DRIVERID_ASB100 1043

/*
-
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