Signed-off-by: Darrick J. Wong <djwong at us.ibm.com> --- Documentation/hwmon/adt7473 | 30 +++++++++++------------------- 1 files changed, 11 insertions(+), 19 deletions(-) diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473 index 2126de3..8bffc41 100644 --- a/Documentation/hwmon/adt7473 +++ b/Documentation/hwmon/adt7473 @@ -14,18 +14,18 @@ Description This driver implements support for the Analog Devices ADT7473 chip family. -The LM85 uses the 2-wire interface compatible with the SMBUS 2.0 +The ADT7473 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 three (3) 16-bit counters for -measuring fan speed. There are three (3) PWM outputs that can be used -to control fan speed. +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 to +control fan speed. -A sophisticated control system for the PWM outputs is designed into the -LM85 that allows fan speed to be adjusted automatically based on any of the -three temperature sensors. Each PWM output is individually adjustable and +A sophisticated control system for the PWM outputs is designed into the ADT7473 +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 ADT7473 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. +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 ADT7473 will signal an ALARM if @@ -46,14 +46,6 @@ from the raw value to get the temperature value. The Analog Devices datasheet is very detailed and describes a procedure for determining an optimal configuration for the automatic PWM control. -Hardware Configurations ------------------------ - -The ADT7473 chips have an optional SMBALERT output that can be used to -signal the chipset in case a limit is exceeded or the temperature sensors -fail. Individual sensor interrupts can be masked so they won't trigger -SMBALERT. The SMBALERT output if configured replaces the PWM2 function. - Configuration Notes ------------------- @@ -61,8 +53,8 @@ Besides standard interfaces driver adds the following: * PWM Control -* pwm#_auto_point1_pwm and pwm#_auto_point1_temp and -* pwm#_auto_point2_pwm and pwm#_auto_point2_temp - +* 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.
