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Diffstat (limited to 'Documentation/hwmon/lm90.rst')
| -rw-r--r-- | Documentation/hwmon/lm90.rst | 274 |
1 files changed, 258 insertions, 16 deletions
diff --git a/Documentation/hwmon/lm90.rst b/Documentation/hwmon/lm90.rst index 953315987c06..23af17a0ab44 100644 --- a/Documentation/hwmon/lm90.rst +++ b/Documentation/hwmon/lm90.rst @@ -3,6 +3,14 @@ Kernel driver lm90 Supported chips: + * National Semiconductor LM84 + + Prefix: 'lm84' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the National Semiconductor website + * National Semiconductor LM90 Prefix: 'lm90' @@ -43,6 +51,30 @@ Supported chips: http://www.national.com/mpf/LM/LM86.html + * Analog Devices ADM1020 + + Prefix: 'adm1020' + + Addresses scanned: I2C 0x4c - 0x4e + + Datasheet: Publicly available at the Analog Devices website + + * Analog Devices ADM1021 + + Prefix: 'adm1021' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the Analog Devices website + + * Analog Devices ADM1021A/ADM1023 + + Prefix: 'adm1023' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the Analog Devices website + * Analog Devices ADM1032 Prefix: 'adm1032' @@ -51,7 +83,7 @@ Supported chips: Datasheet: Publicly available at the ON Semiconductor website - http://www.onsemi.com/PowerSolutions/product.do?id=ADM1032 + https://www.onsemi.com/PowerSolutions/product.do?id=ADM1032 * Analog Devices ADT7461 @@ -61,7 +93,7 @@ Supported chips: Datasheet: Publicly available at the ON Semiconductor website - http://www.onsemi.com/PowerSolutions/product.do?id=ADT7461 + https://www.onsemi.com/PowerSolutions/product.do?id=ADT7461 * Analog Devices ADT7461A @@ -71,7 +103,37 @@ Supported chips: Datasheet: Publicly available at the ON Semiconductor website - http://www.onsemi.com/PowerSolutions/product.do?id=ADT7461A + https://www.onsemi.com/PowerSolutions/product.do?id=ADT7461A + + * Analog Devices ADT7481 + + Prefix: 'adt7481' + + Addresses scanned: I2C 0x4b and 0x4c + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=ADT7481 + + * Analog Devices ADT7482 + + Prefix: 'adt7482' + + Addresses scanned: I2C 0x4c + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=ADT7482 + + * Analog Devices ADT7483A + + Prefix: 'adt7483a' + + Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=ADT7483A * ON Semiconductor NCT1008 @@ -81,7 +143,73 @@ Supported chips: Datasheet: Publicly available at the ON Semiconductor website - http://www.onsemi.com/PowerSolutions/product.do?id=NCT1008 + https://www.onsemi.com/PowerSolutions/product.do?id=NCT1008 + + * ON Semiconductor NCT210 + + Prefix: 'adm1021' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=NCT210 + + * ON Semiconductor NCT214 + + Prefix: 'nct214' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=NCT214 + + * ON Semiconductor NCT218 + + Prefix: 'nct218' + + Addresses scanned: I2C 0x4c - 0x4d + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=NCT218 + + * ON Semiconductor NCT72 + + Prefix: 'nct72' + + Addresses scanned: I2C 0x4c - 0x4d + + Datasheet: Publicly available at the ON Semiconductor website + + https://www.onsemi.com/PowerSolutions/product.do?id=NCT72 + + * Maxim MAX1617 + + Prefix: 'max1617' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the Maxim website + + * Maxim MAX1617A + + Prefix: 'max1617a' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the Maxim website + + * Maxim MAX6642 + + Prefix: 'max6642' + + Addresses scanned: I2C 0x48-0x4f + + Datasheet: Publicly available at the Maxim website + + http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf * Maxim MAX6646 @@ -105,7 +233,7 @@ Supported chips: * Maxim MAX6648 - Prefix: 'max6646' + Prefix: 'max6648' Addresses scanned: I2C 0x4c @@ -123,6 +251,18 @@ Supported chips: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497 + * Maxim MAX6654 + + Prefix: 'max6654' + + Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, + + 0x4c, 0x4d and 0x4e + + Datasheet: Publicly available at the Maxim website + + https://www.maximintegrated.com/en/products/sensors/MAX6654.html + * Maxim MAX6657 Prefix: 'max6657' @@ -179,7 +319,7 @@ Supported chips: * Maxim MAX6692 - Prefix: 'max6646' + Prefix: 'max6648' Addresses scanned: I2C 0x4c @@ -251,7 +391,57 @@ Supported chips: Datasheet: Publicly available at TI website - http://www.ti.com/litv/pdf/sbos686 + https://www.ti.com/litv/pdf/sbos686 + + * Texas Instruments TMP461 + + Prefix: 'tmp461' + + Addresses scanned: I2C 0x48 through 0x4F + + Datasheet: Publicly available at TI website + + https://www.ti.com/lit/gpn/tmp461 + + * Philips NE1617, NE1617A + + Prefix: 'max1617' (probably detected as a max1617) + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheets: Publicly available at the Philips website + + * Philips NE1618 + + Prefix: 'ne1618' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheets: Publicly available at the Philips website + + * Genesys Logic GL523SM + + Prefix: 'gl523sm' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: + + * TI THMC10 + + Prefix: 'thmc10' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the TI website + + * Onsemi MC1066 + + Prefix: 'mc1066' + + Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e + + Datasheet: Publicly available at the Onsemi website Author: Jean Delvare <jdelvare@suse.de> @@ -263,6 +453,12 @@ The LM90 is a digital temperature sensor. It senses its own temperature as well as the temperature of up to one external diode. It is compatible with many other devices, many of which are supported by this driver. +The family of chips supported by this driver is derived from MAX1617. +This chip as well as various compatible chips support a local and a remote +temperature sensor with 8 bit accuracy. Later chips provide improved accuracy +and other additional features such as hysteresis and temperature offset +registers. + Note that there is no easy way to differentiate between the MAX6657, MAX6658 and MAX6659 variants. The extra features of the MAX6659 are only supported by this driver if the chip is located at address 0x4d or 0x4e, @@ -270,15 +466,31 @@ or if the chip type is explicitly selected as max6659. The MAX6680 and MAX6681 only differ in their pinout, therefore they obviously can't (and don't need to) be distinguished. -The specificity of this family of chipsets over the ADM1021/LM84 -family is that it features critical limits with hysteresis, and an -increased resolution of the remote temperature measurement. - The different chipsets of the family are not strictly identical, although very similar. For reference, here comes a non-exhaustive list of specific features: +LM84: + * 8 bit sensor resolution + +ADM1020, ADM1021, GL523SM, MAX1617, NE1617, NE1617A, THMC10: + * 8 bit sensor resolution + * Low temperature limits + +NCT210, NE1618: + * 11 bit sensor resolution for remote temperature sensor + * Low temperature limits + +ADM1021A, ADM1023: + * Temperature offset register for remote temperature sensor + * 11 bit resolution for remote temperature sensor + * Low temperature limits + LM90: + * 11 bit resolution for remote temperature sensor + * Temperature offset register for remote temperature sensor + * Low and critical temperature limits + * Configurable conversion rate * Filter and alert configuration register at 0xBF. * ALERT is triggered by temperatures over critical limits. @@ -300,6 +512,36 @@ ADM1032: ADT7461, ADT7461A, NCT1008: * Extended temperature range (breaks compatibility) * Lower resolution for remote temperature + * SMBus PEC support for Write Byte and Receive Byte transactions. + * 10 bit temperature resolution + +ADT7481, ADT7482, ADT7483: + * Temperature offset register + * SMBus PEC support + * 10 bit temperature resolution for external sensors + * Two remote sensors + * Selectable address (ADT7483) + +MAX6642: + * No critical limit register + * Conversion rate not configurable + * Better local resolution (10 bit) + * 10 bit external sensor resolution + +MAX6646, MAX6647, MAX6649: + * Better local resolution + * Extended range unsigned external temperature + +MAX6648, MAX6692: + * Better local resolution + * Unsigned temperature + +MAX6654, MAX6690: + * Better local resolution + * Selectable address + * Remote sensor type selection + * Extended temperature range + * Extended resolution only available when conversion rate <= 1 Hz MAX6657 and MAX6658: * Better local resolution @@ -336,8 +578,8 @@ SA56004X: All temperature values are given in degrees Celsius. Resolution is 1.0 degree for the local temperature, 0.125 degree for the remote -temperature, except for the MAX6657, MAX6658 and MAX6659 which have a -resolution of 0.125 degree for both temperatures. +temperature, except for the MAX6654, MAX6657, MAX6658 and MAX6659 which have +a resolution of 0.125 degree for both temperatures. Each sensor has its own high and low limits, plus a critical limit. Additionally, there is a relative hysteresis value common to both critical @@ -394,6 +636,6 @@ two transactions will typically mean twice as much delay waiting for transaction completion, effectively doubling the register cache refresh time. I guess reliability comes at a price, but it's quite expensive this time. -So, as not everyone might enjoy the slowdown, PEC can be disabled through -sysfs. Just write 0 to the "pec" file and PEC will be disabled. Write 1 -to that file to enable PEC again. +So, as not everyone might enjoy the slowdown, PEC is disabled by default and +can be enabled through sysfs. Just write 1 to the "pec" file and PEC will be +enabled. Write 0 to that file to disable PEC again. |