hwmon: (tmp421) Add support for TMP441 and TMP442
TMP441 and TMP442 are compatible to TMP421 and TMP422. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jean Delvare <jdelvare@suse.de>
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@ -14,6 +14,14 @@ Supported chips:
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Prefix: 'tmp423'
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Prefix: 'tmp423'
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Addresses scanned: I2C 0x4c and 0x4d
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Addresses scanned: I2C 0x4c and 0x4d
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
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Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
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* Texas Instruments TMP441
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Prefix: 'tmp441'
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Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
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Datasheet: http://www.ti.com/product/tmp441
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* Texas Instruments TMP442
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Prefix: 'tmp442'
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Addresses scanned: I2C 0x4c and 0x4d
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Datasheet: http://www.ti.com/product/tmp442
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Authors:
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Authors:
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Andre Prendel <andre.prendel@gmx.de>
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Andre Prendel <andre.prendel@gmx.de>
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@ -21,13 +29,13 @@ Authors:
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Description
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Description
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-----------
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-----------
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This driver implements support for Texas Instruments TMP421, TMP422
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This driver implements support for Texas Instruments TMP421, TMP422,
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and TMP423 temperature sensor chips. These chips implement one local
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TMP423, TMP441, and TMP442 temperature sensor chips. These chips
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and up to one (TMP421), up to two (TMP422) or up to three (TMP423)
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implement one local and up to one (TMP421, TMP441), up to two (TMP422,
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remote sensors. Temperature is measured in degrees Celsius. The chips
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TMP442) or up to three (TMP423) remote sensors. Temperature is measured
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are wired over I2C/SMBus and specified over a temperature range of -40
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in degrees Celsius. The chips are wired over I2C/SMBus and specified
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to +125 degrees Celsius. Resolution for both the local and remote
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over a temperature range of -40 to +125 degrees Celsius. Resolution
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channels is 0.0625 degree C.
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for both the local and remote channels is 0.0625 degree C.
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The chips support only temperature measurement. The driver exports
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The chips support only temperature measurement. The driver exports
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the temperature values via the following sysfs files:
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the temperature values via the following sysfs files:
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@ -1431,7 +1431,7 @@ config SENSORS_TMP421
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depends on I2C
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depends on I2C
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help
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help
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If you say yes here you get support for Texas Instruments TMP421,
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If you say yes here you get support for Texas Instruments TMP421,
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TMP422 and TMP423 temperature sensor chips.
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TMP422, TMP423, TMP441, and TMP442 temperature sensor chips.
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This driver can also be built as a module. If so, the module
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This driver can also be built as a module. If so, the module
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will be called tmp421.
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will be called tmp421.
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@ -21,7 +21,7 @@
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/*
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/*
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* Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.
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* Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.
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* Supported models: TMP421, TMP422, TMP423
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* Supported models: TMP421, TMP422, TMP423, TMP441, TMP442
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*/
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*/
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#include <linux/module.h>
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#include <linux/module.h>
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@ -39,7 +39,7 @@
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static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f,
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static const unsigned short normal_i2c[] = { 0x2a, 0x4c, 0x4d, 0x4e, 0x4f,
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I2C_CLIENT_END };
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I2C_CLIENT_END };
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enum chips { tmp421, tmp422, tmp423 };
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enum chips { tmp421, tmp422, tmp423, tmp441, tmp442 };
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/* The TMP421 registers */
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/* The TMP421 registers */
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#define TMP421_STATUS_REG 0x08
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#define TMP421_STATUS_REG 0x08
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@ -60,11 +60,15 @@ static const u8 TMP421_TEMP_LSB[4] = { 0x10, 0x11, 0x12, 0x13 };
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#define TMP421_DEVICE_ID 0x21
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#define TMP421_DEVICE_ID 0x21
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#define TMP422_DEVICE_ID 0x22
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#define TMP422_DEVICE_ID 0x22
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#define TMP423_DEVICE_ID 0x23
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#define TMP423_DEVICE_ID 0x23
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#define TMP441_DEVICE_ID 0x41
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#define TMP442_DEVICE_ID 0x42
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static const struct i2c_device_id tmp421_id[] = {
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static const struct i2c_device_id tmp421_id[] = {
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{ "tmp421", 2 },
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{ "tmp421", 2 },
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{ "tmp422", 3 },
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{ "tmp422", 3 },
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{ "tmp423", 4 },
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{ "tmp423", 4 },
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{ "tmp441", 2 },
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{ "tmp442", 3 },
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{ }
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{ }
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};
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};
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MODULE_DEVICE_TABLE(i2c, tmp421_id);
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MODULE_DEVICE_TABLE(i2c, tmp421_id);
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@ -235,7 +239,8 @@ static int tmp421_detect(struct i2c_client *client,
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{
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{
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enum chips kind;
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enum chips kind;
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struct i2c_adapter *adapter = client->adapter;
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struct i2c_adapter *adapter = client->adapter;
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const char *names[] = { "TMP421", "TMP422", "TMP423" };
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const char * const names[] = { "TMP421", "TMP422", "TMP423",
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"TMP441", "TMP442" };
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int addr = client->addr;
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int addr = client->addr;
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u8 reg;
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u8 reg;
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@ -269,6 +274,14 @@ static int tmp421_detect(struct i2c_client *client,
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return -ENODEV;
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return -ENODEV;
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kind = tmp423;
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kind = tmp423;
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break;
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break;
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case TMP441_DEVICE_ID:
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kind = tmp441;
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break;
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case TMP442_DEVICE_ID:
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if (addr != 0x4c && addr != 0x4d)
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return -ENODEV;
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kind = tmp442;
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break;
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default:
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default:
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return -ENODEV;
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return -ENODEV;
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}
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}
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@ -319,5 +332,5 @@ static struct i2c_driver tmp421_driver = {
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module_i2c_driver(tmp421_driver);
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module_i2c_driver(tmp421_driver);
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MODULE_AUTHOR("Andre Prendel <andre.prendel@gmx.de>");
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MODULE_AUTHOR("Andre Prendel <andre.prendel@gmx.de>");
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MODULE_DESCRIPTION("Texas Instruments TMP421/422/423 temperature sensor driver");
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MODULE_DESCRIPTION("Texas Instruments TMP421/422/423/441/442 temperature sensor driver");
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MODULE_LICENSE("GPL");
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MODULE_LICENSE("GPL");
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