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Diffstat (limited to 'Documentation/hwmon/adt7462')
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diff --git a/Documentation/hwmon/adt7462 b/Documentation/hwmon/adt7462 deleted file mode 100644 index ec660b328275..000000000000 --- a/Documentation/hwmon/adt7462 +++ /dev/null @@ -1,67 +0,0 @@ -Kernel driver adt7462 -====================== - -Supported chips: - * Analog Devices ADT7462 - Prefix: 'adt7462' - Addresses scanned: I2C 0x58, 0x5C - Datasheet: Publicly available at the Analog Devices website - -Author: Darrick J. Wong - -Description ------------ - -This driver implements support for the Analog Devices ADT7462 chip family. - -This chip is a bit of a beast. It has 8 counters for measuring fan speed. It -can also measure 13 voltages or 4 temperatures, or various combinations of the -two. See the chip documentation for more details about the exact set of -configurations. This driver does not allow one to configure the chip; that is -left to the system designer. - -A sophisticated control system for the PWM outputs is designed into the ADT7462 -that allows fan speed to be adjusted automatically based on any of the three -temperature sensors. Each PWM output is individually adjustable and -programmable. Once configured, the ADT7462 will adjust the PWM outputs in -response to the measured temperatures without further host intervention. This -feature can also be disabled for manual control of the PWM's. - -Each of the measured inputs (voltage, temperature, fan speed) has -corresponding high/low limit values. The ADT7462 will signal an ALARM if -any measured value exceeds either limit. - -The ADT7462 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. - -Special Features ----------------- - -The ADT7462 have a 10-bit ADC and can therefore measure temperatures -with 0.25 degC resolution. - -The Analog Devices datasheet is very detailed and describes a procedure for -determining an optimal configuration for the automatic PWM control. - -The driver will report sensor labels when it is able to determine that -information from the configuration registers. - -Configuration Notes -------------------- - -Besides standard interfaces driver adds the following: - -* PWM Control - -* pwm#_auto_point1_pwm and temp#_auto_point1_temp and -* pwm#_auto_point2_pwm and temp#_auto_point2_temp - - -point1: Set the pwm speed at a lower temperature bound. -point2: Set the pwm speed at a higher temperature bound. - -The ADT7462 will scale the pwm between the lower and higher pwm speed when -the temperature is between the two temperature boundaries. PWM values range -from 0 (off) to 255 (full speed). Fan speed will be set to maximum when the -temperature sensor associated with the PWM control exceeds temp#_max. - |