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Commit 43cb7ebe authored by Jordan Crouse's avatar Jordan Crouse Committed by Greg Kroah-Hartman
Browse files

[PATCH] lm83: Add LM82 support 



Add LM82 temperature sensor support (similar to the LM83,
but less featureful).

Signed-off-by: default avatarJordan Crouse <jordan.crouse@amd.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 52ab3f3d

Documentation/hwmon/lm83

+12 −4
Original line number Diff line number Diff line
@@ -7,6 +7,10 @@ Supported chips: 
    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e

    Datasheet: Publicly available at the National Semiconductor website

               http://www.national.com/pf/LM/LM83.html

  * National Semiconductor LM82

    Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e

    Datasheet: Publicly available at the National Semiconductor website

               http://www.national.com/pf/LM/LM82.html





Author: Jean Delvare <khali@linux-fr.org>
@@ -15,10 +19,11 @@ Description 
-----------



The LM83 is a digital temperature sensor. It senses its own temperature as

well as the temperature of up to three external diodes. It is compatible

with many other devices such as the LM84 and all other ADM1021 clones.

The main difference between the LM83 and the LM84 in that the later can

only sense the temperature of one external diode.

well as the temperature of up to three external diodes. The LM82 is

a stripped down version of the LM83 that only supports one external diode.

Both are compatible with many other devices such as the LM84 and all

other ADM1021 clones. The main difference between the LM83 and the LM84

in that the later can only sense the temperature of one external diode.



Using the adm1021 driver for a LM83 should work, but only two temperatures

will be reported instead of four.
@@ -36,6 +41,9 @@ Unconfirmed motherboards: 
    Iwill       MPX2

    Soltek      SL-75DRV5



The LM82 is confirmed to have been found on most AMD Geode reference

designs and test platforms.



The driver has been successfully tested by Magnus Forsström, who I'd

like to thank here. More testers will be of course welcome.

drivers/hwmon/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -236,11 +236,11 @@ config SENSORS_LM80 
	  will be called lm80.



config SENSORS_LM83

	tristate "National Semiconductor LM83"

	tristate "National Semiconductor LM83 and compatibles"

	depends on HWMON && I2C

	help

	  If you say yes here you get support for National Semiconductor

	  LM83 sensor chips.

	  LM82 and LM83 sensor chips.



	  This driver can also be built as a module.  If so, the module

	  will be called lm83.

drivers/hwmon/lm83.c

+37 −13
Original line number Diff line number Diff line
@@ -12,6 +12,10 @@ 
 * Since the datasheet omits to give the chip stepping code, I give it

 * here: 0x03 (at register 0xff).

 *

 * Also supports the LM82 temp sensor, which is basically a stripped down

 * model of the LM83.  Datasheet is here:

 * http://www.national.com/pf/LM/LM82.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
@@ -52,7 +56,7 @@ static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, 
 * Insmod parameters

 */



I2C_CLIENT_INSMOD_1(lm83);

I2C_CLIENT_INSMOD_2(lm83, lm82);



/*

 * The LM83 registers
@@ -283,6 +287,9 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) 
		if (man_id == 0x01) { /* National Semiconductor */

			if (chip_id == 0x03) {

				kind = lm83;

			} else

			if (chip_id == 0x01) {

				kind = lm82;

			}

		}
@@ -296,6 +303,9 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) 


	if (kind == lm83) {

		name = "lm83";

	} else

	if (kind == lm82) {

		name = "lm82";

	}



	/* We can fill in the remaining client fields */
@@ -319,31 +329,45 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) 
		goto exit_detach;

	}



	/*

	 * The LM82 can only monitor one external diode which is

	 * at the same register as the LM83 temp3 entry - so we

	 * declare 1 and 3 common, and then 2 and 4 only for the LM83.

	 */



	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_input.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp4_input.dev_attr);



	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_max.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp4_max.dev_attr);



	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp1_crit.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp2_crit.dev_attr);

	device_create_file(&new_client->dev,

			   &sensor_dev_attr_temp3_crit.dev_attr);



	device_create_file(&new_client->dev, &dev_attr_alarms);



	if (kind == lm83) {

		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp2_input.dev_attr);

		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp4_input.dev_attr);



		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp2_max.dev_attr);

		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp4_max.dev_attr);



		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp2_crit.dev_attr);

		device_create_file(&new_client->dev,

				   &sensor_dev_attr_temp4_crit.dev_attr);

	device_create_file(&new_client->dev, &dev_attr_alarms);

	}



	return 0;