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Diffstat (limited to 'Documentation/hwmon/adt7475')
| -rw-r--r-- | Documentation/hwmon/adt7475 | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/Documentation/hwmon/adt7475 b/Documentation/hwmon/adt7475 index ebfee55..f08f287 100644 --- a/Documentation/hwmon/adt7475 +++ b/Documentation/hwmon/adt7475 @@ -10,24 +10,31 @@ Supported chips: Prefix: 'adt7475' Addresses scanned: I2C 0x2E Datasheet: Publicly available at the On Semiconductors website + * Analog Devices ADT7490 + Prefix: 'adt7490' + Addresses scanned: I2C 0x2C, 0x2D, 0x2E + Datasheet: Publicly available at the On Semiconductors website Authors: Jordan Crouse Hans de Goede Darrick J. Wong (documentation) + Jean Delvare Description ----------- -This driver implements support for the Analog Devices ADT7473 and ADT7475 -chip family. Both chips differ only in minor details. They will be -collectively designed by the name "ADT747x" in the rest of this document. +This driver implements support for the Analog Devices ADT7473, ADT7475 and +ADT7490 chip family. The ADT7473 and ADT7475 differ only in minor details. +The ADT7490 has additional features, including extra voltage measurement +inputs and PECI support. All the supported chips will be collectively +designed by the name "ADT747x" in the rest of this document. The ADT747x uses the 2-wire interface compatible with the SMBus 2.0 specification. Using an analog to digital converter it measures three (3) -temperatures and two (2) voltages. It has four (4) 16-bit counters for -measuring fan speed. There are three (3) PWM outputs that can be used +temperatures and two (2) or more voltages. It has four (4) 16-bit counters +for measuring fan speed. There are three (3) PWM outputs that can be used to control fan speed. A sophisticated control system for the PWM outputs is designed into the @@ -45,6 +52,23 @@ The ADT747x samples all inputs continuously. The driver will not read the registers more often than once every other second. Further, configuration data is only read once per minute. +Chip Differences Summary +------------------------ + +ADT7473: + * 2 voltage inputs + * system acoustics optimizations (not implemented) + +ADT7475: + * 2 voltage inputs + +ADT7490: + * 6 voltage inputs + * 1 Imon input (not implemented) + * PECI support (not implemented) + * 2 GPIO pins (not implemented) + * system acoustics optimizations (not implemented) + Special Features ---------------- |