Commit 05c77ab2 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (tmp421) Add support for TMP441 and TMP442 



TMP441 and TMP442 are compatible to TMP421 and TMP422.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarJean Delvare <jdelvare@suse.de>
parent a63ee9d8

Documentation/hwmon/tmp421

+15 −7
Original line number Diff line number Diff line
@@ -14,6 +14,14 @@ Supported chips: 
    Prefix: 'tmp423'

    Addresses scanned: I2C 0x4c and 0x4d

    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html

  * Texas Instruments TMP441

    Prefix: 'tmp441'

    Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f

    Datasheet: http://www.ti.com/product/tmp441

  * Texas Instruments TMP442

    Prefix: 'tmp442'

    Addresses scanned: I2C 0x4c and 0x4d

    Datasheet: http://www.ti.com/product/tmp442



Authors:

	Andre Prendel <andre.prendel@gmx.de>
@@ -21,13 +29,13 @@ Authors: 
Description

-----------



This driver implements support for Texas Instruments TMP421, TMP422

and TMP423 temperature sensor chips. These chips implement one local

and up to one (TMP421), up to two (TMP422) or up to three (TMP423)

remote sensors. Temperature is measured in degrees Celsius. The chips

are wired over I2C/SMBus and specified over a temperature range of -40

to +125 degrees Celsius. Resolution for both the local and remote

channels is 0.0625 degree C.

This driver implements support for Texas Instruments TMP421, TMP422,

TMP423, TMP441, and TMP442 temperature sensor chips. These chips

implement one local and up to one (TMP421, TMP441), up to two (TMP422,

TMP442) or up to three (TMP423) remote sensors. Temperature is measured

in degrees Celsius. The chips are wired over I2C/SMBus and specified

over a temperature range of -40 to +125 degrees Celsius. Resolution

for both the local and remote channels is 0.0625 degree C.



The chips support only temperature measurement. The driver exports

the temperature values via the following sysfs files:

drivers/hwmon/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -1431,7 +1431,7 @@ config SENSORS_TMP421 
	depends on I2C

	help

	  If you say yes here you get support for Texas Instruments TMP421,

	  TMP422 and TMP423 temperature sensor chips.

	  TMP422, TMP423, TMP441, and TMP442 temperature sensor chips.



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

	  will be called tmp421.

drivers/hwmon/tmp421.c

+17 −4
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ 


/*

 * Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.

 * Supported models: TMP421, TMP422, TMP423

 * Supported models: TMP421, TMP422, TMP423, TMP441, TMP442

 */



#include <linux/module.h>
@@ -39,7 +39,7 @@ 
static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f,

					     I2C_CLIENT_END };



enum chips { tmp421, tmp422, tmp423 };

enum chips { tmp421, tmp422, tmp423, tmp441, tmp442 };



/* The TMP421 registers */

#define TMP421_STATUS_REG			0x08
@@ -60,11 +60,15 @@ static const u8 TMP421_TEMP_LSB[4] = { 0x10, 0x11, 0x12, 0x13 }; 
#define TMP421_DEVICE_ID			0x21

#define TMP422_DEVICE_ID			0x22

#define TMP423_DEVICE_ID			0x23

#define TMP441_DEVICE_ID			0x41

#define TMP442_DEVICE_ID			0x42



static const struct i2c_device_id tmp421_id[] = {

	{ "tmp421", 2 },

	{ "tmp422", 3 },

	{ "tmp423", 4 },

	{ "tmp441", 2 },

	{ "tmp442", 3 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, tmp421_id);
@@ -235,7 +239,8 @@ static int tmp421_detect(struct i2c_client *client, 
{

	enum chips kind;

	struct i2c_adapter *adapter = client->adapter;

	const char *names[] = { "TMP421", "TMP422", "TMP423" };

	const char * const names[] = { "TMP421", "TMP422", "TMP423",

				       "TMP441", "TMP442" };

	int addr = client->addr;

	u8 reg;
@@ -269,6 +274,14 @@ static int tmp421_detect(struct i2c_client *client, 
			return -ENODEV;

		kind = tmp423;

		break;

	case TMP441_DEVICE_ID:

		kind = tmp441;

		break;

	case TMP442_DEVICE_ID:

		if (addr != 0x4c && addr != 0x4d)

			return -ENODEV;

		kind = tmp442;

		break;

	default:

		return -ENODEV;

	}
@@ -319,5 +332,5 @@ static struct i2c_driver tmp421_driver = { 
module_i2c_driver(tmp421_driver);



MODULE_AUTHOR("Andre Prendel <andre.prendel@gmx.de>");

MODULE_DESCRIPTION("Texas Instruments TMP421/422/423 temperature sensor driver");

MODULE_DESCRIPTION("Texas Instruments TMP421/422/423/441/442 temperature sensor driver");

MODULE_LICENSE("GPL");