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hwmon: (lm87) Add support for the Analog Devices ADM1024 

It happens that the Analog Devices ADM1024 is fully compatible with
the National Semiconductor LM87, so support for the former can easily
be added to the lm87 driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Jean Delvare 2007-10-09 15:22:22 +02:00 committed by Mark M. Hoffman
parent 85f03bccd6
commit c7fa373796
3 changed files with 29 additions and 11 deletions
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11
Documentation/hwmon/lm87
View File

@ -4,8 +4,12 @@ Kernel driver lm87
Supported chips:
* National Semiconductor LM87
Prefix: 'lm87'
Addresses scanned: I2C 0x2c - 0x2f
Addresses scanned: I2C 0x2c - 0x2e
Datasheet: http://www.national.com/pf/LM/LM87.html
* Analog Devices ADM1024
Prefix: 'adm1024'
Addresses scanned: I2C 0x2c - 0x2e
Datasheet: http://www.analog.com/en/prod/0,2877,ADM1024,00.html
Authors:
Frodo Looijaard <frodol@dds.nl>,
@ -19,11 +23,12 @@ Authors:
Description
-----------
This driver implements support for the National Semiconductor LM87.
This driver implements support for the National Semiconductor LM87
and the Analog Devices ADM1024.
The LM87 implements up to three temperature sensors, up to two fan
rotation speed sensors, up to seven voltage sensors, alarms, and some
miscellaneous stuff.
miscellaneous stuff. The ADM1024 is fully compatible.
Temperatures are measured in degrees Celsius. Each input has a high
and low alarm settings. A high limit produces an alarm when the value

4
drivers/hwmon/Kconfig
View File

@ -433,12 +433,12 @@ config SENSORS_LM85
will be called lm85.
config SENSORS_LM87
tristate "National Semiconductor LM87"
tristate "National Semiconductor LM87 and compatibles"
depends on I2C
select HWMON_VID
help
If you say yes here you get support for National Semiconductor LM87
sensor chips.
and Analog Devices ADM1024 sensor chips.
This driver can also be built as a module. If so, the module
will be called lm87.

25
drivers/hwmon/lm87.c
View File

@ -5,7 +5,7 @@
* Philip Edelbrock <phil@netroedge.com>
* Stephen Rousset <stephen.rousset@rocketlogix.com>
* Dan Eaton <dan.eaton@rocketlogix.com>
* Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
* Copyright (C) 2004,2007 Jean Delvare <khali@linux-fr.org>
*
* Original port to Linux 2.6 by Jeff Oliver.
*
@ -37,6 +37,11 @@
* instead. The LM87 is the only hardware monitoring chipset I know of
* which uses amplitude modulation. Be careful when using this feature.
*
* This driver also supports the ADM1024, a sensor chip made by Analog
* Devices. That chip is fully compatible with the LM87. Complete
* datasheet can be obtained from Analog's website at:
* http://www.analog.com/en/prod/0,2877,ADM1024,00.html
*
* 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
@ -74,7 +79,7 @@ static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
* Insmod parameters
*/
I2C_CLIENT_INSMOD_1(lm87);
I2C_CLIENT_INSMOD_2(lm87, adm1024);
/*
* The LM87 registers
@ -662,6 +667,7 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
struct i2c_client *new_client;
struct lm87_data *data;
int err = 0;
static const char *names[] = { "lm87", "adm1024" };
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
@ -686,11 +692,18 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
/* Now, we do the remaining detection. */
if (kind < 0) {
u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
if (rev < 0x01 || rev > 0x08
|| (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
|| lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) {
if (cid == 0x02 /* National Semiconductor */
&& (rev >= 0x01 && rev <= 0x08))
kind = lm87;
else if (cid == 0x41 /* Analog Devices */
&& (rev & 0xf0) == 0x10)
kind = adm1024;
if (kind < 0
|| (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) {
dev_dbg(&adapter->dev,
"LM87 detection failed at 0x%02x.\n",
address);
@ -699,7 +712,7 @@ static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
}
/* We can fill in the remaining client fields */
strlcpy(new_client->name, "lm87", I2C_NAME_SIZE);
strlcpy(new_client->name, names[kind - 1], I2C_NAME_SIZE);
data->valid = 0;
mutex_init(&data->update_lock);