Commit 162a8dfe authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm95245) Add support for LM95235 



LM95235 is register compatible to LM95245.

Also update link to LM95245 data sheet, and drop the link to the
datasheet from the driver source to simplify code maintenance.

Reviewed-by: default avatarJean Delvare <jdelvare@suse.de>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent f975b339

Documentation/hwmon/lm95245

+9 −5
Original line number Diff line number Diff line
@@ -2,10 +2,14 @@ Kernel driver lm95245 
==================



Supported chips:

  * National Semiconductor LM95245

  * TI LM95235

    Addresses scanned: I2C 0x18, 0x29, 0x4c

    Datasheet: Publicly available at the TI website

               http://www.ti.com/lit/ds/symlink/lm95235.pdf

  * TI / National Semiconductor LM95245

    Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d

    Datasheet: Publicly available at the National Semiconductor website

               http://www.national.com/mpf/LM/LM95245.html

    Datasheet: Publicly available at the TI website

               http://www.ti.com/lit/ds/symlink/lm95245.pdf





Author: Alexander Stein <alexander.stein@systec-electronic.com>
@@ -13,10 +17,10 @@ Author: Alexander Stein <alexander.stein@systec-electronic.com> 
Description

-----------



The LM95245 is an 11-bit digital temperature sensor with a 2-wire System

LM95235 and LM95245 are 11-bit digital temperature sensors with a 2-wire System

Management Bus (SMBus) interface and TruTherm technology that can monitor

the temperature of a remote diode as well as its own temperature.

The LM95245 can be used to very accurately monitor the temperature of

The chips can be used to very accurately monitor the temperature of

external devices such as microprocessors.



All temperature values are given in millidegrees Celsius. Local temperature

drivers/hwmon/Kconfig

+3 −2
Original line number Diff line number Diff line
@@ -1048,10 +1048,11 @@ config SENSORS_LM95241 
	  will be called lm95241.



config SENSORS_LM95245

	tristate "National Semiconductor LM95245 sensor chip"

	tristate "National Semiconductor LM95245 and compatibles"

	depends on I2C

	help

	  If you say yes here you get support for LM95245 sensor chip.

	  If you say yes here you get support for LM95235 and LM95245

	  temperature sensor chips.



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

	  will be called lm95245.

drivers/hwmon/lm95245.c

+27 −14
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2011 Alexander Stein <alexander.stein@systec-electronic.com>

 *

 * The LM95245 is a sensor chip made by National Semiconductors.

 * The LM95245 is a sensor chip made by TI / National Semiconductor.

 * It reports up to two temperatures (its own plus an external one).

 * Complete datasheet can be obtained from National's website at:

 *   http://www.national.com/ds.cgi/LM/LM95245.pdf

 *

 * This driver is based on lm95241.c

 *
@@ -34,8 +32,6 @@ 
#include <linux/mutex.h>

#include <linux/sysfs.h>



#define DEVNAME "lm95245"



static const unsigned short normal_i2c[] = {

	0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END };
@@ -98,7 +94,8 @@ static const unsigned short normal_i2c[] = { 
#define STATUS1_LOC		0x01



#define MANUFACTURER_ID		0x01

#define DEFAULT_REVISION	0xB3

#define LM95235_REVISION	0xB1

#define LM95245_REVISION	0xB3



static const u8 lm95245_reg_address[] = {

	LM95245_REG_R_LOCAL_TEMPH_S,
@@ -427,17 +424,32 @@ static int lm95245_detect(struct i2c_client *new_client, 
			  struct i2c_board_info *info)

{

	struct i2c_adapter *adapter = new_client->adapter;

	int address = new_client->addr;

	const char *name;

	int rev, id;



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

		return -ENODEV;



	if (i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID)

			!= MANUFACTURER_ID

		|| i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID)

			!= DEFAULT_REVISION)

	id = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID);

	if (id != MANUFACTURER_ID)

		return -ENODEV;



	rev = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID);

	switch (rev) {

	case LM95235_REVISION:

		if (address != 0x18 && address != 0x29 && address != 0x4c)

			return -ENODEV;

		name = "lm95235";

		break;

	case LM95245_REVISION:

		name = "lm95245";

		break;

	default:

		return -ENODEV;

	}



	strlcpy(info->type, DEVNAME, I2C_NAME_SIZE);

	strlcpy(info->type, name, I2C_NAME_SIZE);

	return 0;

}
@@ -484,7 +496,8 @@ static int lm95245_probe(struct i2c_client *client, 


/* Driver data (common to all clients) */

static const struct i2c_device_id lm95245_id[] = {

	{ DEVNAME, 0 },

	{ "lm95235", 0 },

	{ "lm95245", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, lm95245_id);
@@ -492,7 +505,7 @@ MODULE_DEVICE_TABLE(i2c, lm95245_id); 
static struct i2c_driver lm95245_driver = {

	.class		= I2C_CLASS_HWMON,

	.driver = {

		.name	= DEVNAME,

		.name	= "lm95245",

	},

	.probe		= lm95245_probe,

	.id_table	= lm95245_id,
@@ -503,5 +516,5 @@ static struct i2c_driver lm95245_driver = { 
module_i2c_driver(lm95245_driver);



MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>");

MODULE_DESCRIPTION("LM95245 sensor driver");

MODULE_DESCRIPTION("LM95235/LM95245 sensor driver");

MODULE_LICENSE("GPL");