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lm-sensors/kernel/chips/lm90.c
T
Jean Delvare 635b1b06bc Support the LM99 (and LM89). 
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2471 7894878c-1315-0410-8ee3-d5d059ff63e0
2004-04-24 08:10:48 +00:00

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/*
* lm90.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 2003-2004 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 LM89 and LM99, two other sensor chips
* made by National Semiconductor. Both have an increased remote
* temperature measurement accuracy (1 degree), and the LM99
* additionally shifts remote temperatures (measured and limits) by 16
* degrees, which allows for higher temperatures measurement. The
* driver doesn't handle it since it can be done easily in user-space.
* Complete datasheets can be obtained from National's website at:
* http://www.national.com/pf/LM/LM89.html
* http://www.national.com/pf/LM/LM99.html
* Note that there is no way to differenciate between both chips.
*
* 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/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-proc.h>
#include <linux/init.h>
#include "version.h"
#ifndef I2C_DRIVERID_LM90
#define I2C_DRIVERID_LM90 1042
#endif
/*
* Addresses to scan
* Address is fully defined internally and cannot be changed.
* LM89, LM90, LM99 and ADM1032 have address 0x4c.
* LM89-1, and LM99-1 have address 0x4d.
*/
static unsigned short normal_i2c[] = { 0x4c, 0x4d, SENSORS_I2C_END };
static unsigned short normal_i2c_range[] = { SENSORS_I2C_END };
static unsigned int normal_isa[] = { SENSORS_ISA_END };
static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
/*
* Insmod parameters
*/
SENSORS_INSMOD_3(lm90, adm1032, lm99);
/*
* 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). The 11-bit conversion formulas may not round negative
* numbers perfectly, but who cares?
*/
#define TEMP1_FROM_REG(val) (val & 0x80 ? val-0x100 : val)
#define TEMP1_TO_REG(val) (val < 0 ? val+0x100 : val)
#define TEMP2_FROM_REG(val) (((val & 0x8000 ? val-0x10000 : val) \
* 10 + 128) >> 8)
#define TEMP2_TO_REG(val) (((val << 8) / 10 + (val < 0 ? \
0x10000 : 0)) & 0xFFE0)
#define HYST_TO_REG(val) (val < 0 ? 0 : val > 31 ? 31 : val)
/*
* Functions declaration
*/
static int lm90_attach_adapter(struct i2c_adapter *adapter);
static int lm90_detect(struct i2c_adapter *adapter, int address,
unsigned short flags, int kind);
static void lm90_init_client(struct i2c_client *client);
static int lm90_detach_client(struct i2c_client *client);
static void lm90_local_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_remote_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_local_tcrit(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_remote_tcrit(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_local_hyst(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_remote_hyst(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void lm90_alarms(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
/*
* Driver data (common to all clients)
*/
static struct i2c_driver lm90_driver = {
.owner = THIS_MODULE,
.name = "LM90/ADM1032 sensor driver",
.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 i2c_client client;
int sysctl_id;
struct semaphore update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
/* registers values */
u8 local_temp, local_high, local_low;
u16 remote_temp, remote_high, remote_low; /* combined */
u8 local_crit, remote_crit;
u8 hyst; /* linked to two sysctl files (hyst1 RW, hyst2 RO) */
u16 alarms; /* bitvector, combined */
};
/*
* Proc entries
* These files are created for each detected LM90.
*/
/* -- SENSORS SYSCTL START -- */
#define LM90_SYSCTL_LOCAL_TEMP 1200
#define LM90_SYSCTL_REMOTE_TEMP 1201
#define LM90_SYSCTL_LOCAL_TCRIT 1204
#define LM90_SYSCTL_REMOTE_TCRIT 1205
#define LM90_SYSCTL_LOCAL_HYST 1207
#define LM90_SYSCTL_REMOTE_HYST 1208
#define LM90_SYSCTL_ALARMS 1210
#define LM90_ALARM_LOCAL_HIGH 0x40
#define LM90_ALARM_LOCAL_LOW 0x20
#define LM90_ALARM_LOCAL_CRIT 0x01
#define LM90_ALARM_REMOTE_HIGH 0x10
#define LM90_ALARM_REMOTE_LOW 0x08
#define LM90_ALARM_REMOTE_CRIT 0x02
#define LM90_ALARM_REMOTE_OPEN 0x04
/* -- SENSORS SYSCTL END -- */
static ctl_table lm90_dir_table_template[] =
{
{LM90_SYSCTL_LOCAL_TEMP, "temp1", NULL, 0, 0644, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_local_temp},
{LM90_SYSCTL_REMOTE_TEMP, "temp2", NULL, 0, 0644, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_remote_temp},
{LM90_SYSCTL_LOCAL_TCRIT, "tcrit1", NULL, 0, 0644, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_local_tcrit},
{LM90_SYSCTL_REMOTE_TCRIT, "tcrit2", NULL, 0, 0644, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_remote_tcrit},
{LM90_SYSCTL_LOCAL_HYST, "hyst1", NULL, 0, 0644, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_local_hyst},
{LM90_SYSCTL_REMOTE_HYST, "hyst2", NULL, 0, 0444, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_remote_hyst},
{LM90_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL,
&i2c_proc_real, &i2c_sysctl_real, NULL, &lm90_alarms},
{0}
};
/*
* Internal variables
*/
static int lm90_id = 0;
/*
* Real code
*/
static int lm90_attach_adapter(struct i2c_adapter *adapter)
{
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,
unsigned short flags, int kind)
{
struct i2c_client *new_client;
struct lm90_data *data;
int err = 0;
const char *type_name = "";
const char *client_name = "";
u8 reg_config1=0, reg_convrate=0;
#ifdef DEBUG
if (i2c_is_isa_adapter(adapter))
{
printk("lm90.o: Called for an ISA bus adapter, aborting.\n");
return 0;
}
#endif
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
{
#ifdef DEBUG
printk("lm90.o: I2C bus doesn't support byte read mode, "
"skipping.\n");
#endif
return 0;
}
if (!(data = kmalloc(sizeof(struct lm90_data), GFP_KERNEL)))
{
printk("lm90.o: Out of memory in lm90_detect (new_client).\n");
return -ENOMEM;
}
/*
* The common I2C client data is placed right before the
* LM90-specific data. The LM90-specific data is pointed to by the
* data field from the I2C client data.
*/
new_client = &data->client;
new_client->addr = address;
new_client->data = data;
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)
{
#ifdef DEBUG
printk(KERN_DEBUG "lm90.o: Detection failed at 0x%02x.\n",
address);
#endif
goto ERROR1;
}
}
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 */
{
u8 reg_config2;
reg_config2 = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONFIG2);
if (kind == 0 /* skip detection */
|| ((reg_config2 & 0xF8) == 0x00
&& reg_convrate <= 0x09))
{
if (address == 0x4C
&& (chip_id & 0xF0) == 0x20) /* LM90 */
{
kind = lm90;
}
else if ((chip_id & 0xF0) == 0x30) /* LM89/LM99 */
{
kind = lm99;
}
}
}
else if (man_id == 0x41) /* Analog Devices */
{
if (address == 0x4C
&& (chip_id & 0xF0) == 0x40 /* ADM1032 */
&& (kind == 0 /* skip detection */
|| (reg_config1 & 0x3F) == 0x00))
{
kind = adm1032;
}
}
}
if (kind <= 0) /* identification failed */
{
printk("lm90.o: Unsupported chip.\n");
goto ERROR1;
}
if (kind == lm90)
{
type_name = "lm90";
client_name = "LM90 chip";
}
else if (kind == adm1032)
{
type_name = "adm1032";
client_name = "ADM1032 chip";
}
else if (kind == lm99)
{
type_name = "lm99";
client_name = "LM99 chip";
}
else
{
printk("lm90.o: Unknown kind %d.\n", kind);
goto ERROR1;
}
/*
* OK, we got a valid chip so we can fill in the remaining client
* fields.
*/
strcpy(new_client->name, client_name);
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)))
{
#ifdef DEBUG
printk("lm90.o: Failed attaching client.\n");
#endif
goto ERROR1;
}
/*
* Register a new directory entry.
*/
if ((err = i2c_register_entry(new_client, type_name,
lm90_dir_table_template)) < 0)
{
#ifdef DEBUG
printk("lm90.o: Failed registering directory entry.\n");
#endif
goto ERROR2;
}
data->sysctl_id = err;
/*
* Initialize the LM90 chip.
*/
lm90_init_client(new_client);
return 0;
ERROR2:
i2c_detach_client(new_client);
ERROR1:
kfree(data);
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;
i2c_deregister_entry(((struct lm90_data *) (client->data))->sysctl_id);
if ((err = i2c_detach_client(client)))
{
printk("lm90.o: Client deregistration failed, client not "
"detached.\n");
return err;
}
kfree(client->data);
return 0;
}
static void lm90_update_client(struct i2c_client *client)
{
struct lm90_data *data = client->data;
down(&data->update_lock);
if ((jiffies - data->last_updated > HZ * 2) ||
(jiffies < data->last_updated) || !data->valid)
{
u8 oldh, newh;
#ifdef DEBUG
printk("lm90.o: Updating data.\n");
#endif
data->local_temp =
i2c_smbus_read_byte_data(client, LM90_REG_R_LOCAL_TEMP);
data->local_high =
i2c_smbus_read_byte_data(client, LM90_REG_R_LOCAL_HIGH);
data->local_low =
i2c_smbus_read_byte_data(client, LM90_REG_R_LOCAL_LOW);
data->local_crit =
i2c_smbus_read_byte_data(client, LM90_REG_R_LOCAL_CRIT);
/*
* 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->remote_temp =
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->remote_temp =
i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_TEMPL);
#ifdef DEBUG
oldh = /* actually newer */
i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_TEMPH);
if (newh != oldh)
printk("lm90.o: Remote temperature may be wrong.\n");
#endif
}
data->remote_temp |= (newh << 8);
data->remote_high =
(i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_HIGHH) << 8)
+ i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_HIGHL);
data->remote_low =
(i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_LOWH) << 8)
+ i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_LOWL);
data->remote_crit =
i2c_smbus_read_byte_data(client, LM90_REG_R_REMOTE_CRIT);
data->hyst =
i2c_smbus_read_byte_data(client, LM90_REG_R_TCRIT_HYST);
data->alarms =
i2c_smbus_read_byte_data(client, LM90_REG_R_STATUS);
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
}
static void lm90_local_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP1_FROM_REG(data->local_high);
results[1] = TEMP1_FROM_REG(data->local_low);
results[2] = TEMP1_FROM_REG(data->local_temp);
*nrels_mag = 3;
}
else if (operation == SENSORS_PROC_REAL_WRITE)
{
if (*nrels_mag >= 1)
{
data->local_high = TEMP1_TO_REG(results[0]);
i2c_smbus_write_byte_data(client, LM90_REG_W_LOCAL_HIGH,
data->local_high);
}
if (*nrels_mag >= 2)
{
data->local_low = TEMP1_TO_REG(results[1]);
i2c_smbus_write_byte_data(client, LM90_REG_W_LOCAL_LOW,
data->local_low);
}
}
}
static void lm90_remote_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 1; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP2_FROM_REG(data->remote_high);
results[1] = TEMP2_FROM_REG(data->remote_low);
results[2] = TEMP2_FROM_REG(data->remote_temp);
*nrels_mag = 3;
}
else if (operation == SENSORS_PROC_REAL_WRITE)
{
if (*nrels_mag >= 1)
{
data->remote_high = TEMP2_TO_REG(results[0]);
i2c_smbus_write_byte_data(client, LM90_REG_W_REMOTE_HIGHH,
data->remote_high >> 8);
i2c_smbus_write_byte_data(client, LM90_REG_W_REMOTE_HIGHL,
data->remote_high & 0xFF);
}
if (*nrels_mag >= 2)
{
data->remote_low = TEMP2_TO_REG(results[1]);
i2c_smbus_write_byte_data(client, LM90_REG_W_REMOTE_LOWH,
data->remote_low >> 8);
i2c_smbus_write_byte_data(client, LM90_REG_W_REMOTE_LOWL,
data->remote_low & 0xFF);
}
}
}
static void lm90_local_tcrit(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP1_FROM_REG(data->local_crit);
*nrels_mag = 1;
}
else if (operation == SENSORS_PROC_REAL_WRITE)
{
if (*nrels_mag >= 1)
{
data->local_crit = TEMP1_TO_REG(results[0]);
i2c_smbus_write_byte_data(client, LM90_REG_W_LOCAL_CRIT,
data->local_crit);
}
}
}
static void lm90_remote_tcrit(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP1_FROM_REG(data->remote_crit);
*nrels_mag = 1;
}
else if (operation == SENSORS_PROC_REAL_WRITE)
{
if (*nrels_mag >= 1)
{
data->remote_crit = TEMP1_TO_REG(results[0]);
i2c_smbus_write_byte_data(client, LM90_REG_W_REMOTE_CRIT,
data->remote_crit);
}
}
}
/*
* One quick note about hysteresis. Internally, the hysteresis value
* is held in a single register by the LM90, as a relative value.
* This relative value applies to both the local critical temperature
* and the remote critical temperature. Since all temperatures exported
* through procfs have to be absolute, we have to do some conversions.
* The solution retained here is to export two absolute values, one for
* each critical temperature. In order not to confuse the users too
* much, only one file is writable. Would we fail to do so, users
* would probably attempt to write to both files, as if they were
* independant, and since they aren't, they wouldn't understand why
* setting one affects the other one (and would probably claim there's
* a bug in the driver).
*/
static void lm90_local_hyst(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP1_FROM_REG(data->local_crit) -
TEMP1_FROM_REG(data->hyst);
*nrels_mag = 1;
}
else if (operation == SENSORS_PROC_REAL_WRITE)
{
if (*nrels_mag >= 1)
{
data->hyst = HYST_TO_REG(data->local_crit - results[0]);
i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
data->hyst);
}
}
}
static void lm90_remote_hyst(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = TEMP1_FROM_REG(data->remote_crit) -
TEMP1_FROM_REG(data->hyst);
*nrels_mag = 1;
}
}
static void lm90_alarms(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct lm90_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0; /* magnitude */
else if (operation == SENSORS_PROC_REAL_READ)
{
lm90_update_client(client);
results[0] = data->alarms;
*nrels_mag = 1;
}
}
static int __init sm_lm90_init(void)
{
printk(KERN_INFO "lm90.o version %s (%s)\n", LM_VERSION, LM_DATE);
return i2c_add_driver(&lm90_driver);
}
static void __exit sm_lm90_exit(void)
{
i2c_del_driver(&lm90_driver);
}
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("LM90/ADM1032 sensor driver");
MODULE_LICENSE("GPL");
module_init(sm_lm90_init);
module_exit(sm_lm90_exit);
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