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-rw-r--r-- | Documentation/hwmon/adt7473 | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473 index 2126de34c711..1cbf671822e2 100644 --- a/Documentation/hwmon/adt7473 +++ b/Documentation/hwmon/adt7473 | |||
@@ -14,14 +14,14 @@ Description | |||
14 | 14 | ||
15 | This driver implements support for the Analog Devices ADT7473 chip family. | 15 | This driver implements support for the Analog Devices ADT7473 chip family. |
16 | 16 | ||
17 | The LM85 uses the 2-wire interface compatible with the SMBUS 2.0 | 17 | The ADT7473 uses the 2-wire interface compatible with the SMBUS 2.0 |
18 | specification. Using an analog to digital converter it measures three (3) | 18 | specification. Using an analog to digital converter it measures three (3) |
19 | temperatures and two (2) voltages. It has three (3) 16-bit counters for | 19 | temperatures and two (2) voltages. It has four (4) 16-bit counters for |
20 | measuring fan speed. There are three (3) PWM outputs that can be used | 20 | measuring fan speed. There are three (3) PWM outputs that can be used |
21 | to control fan speed. | 21 | to control fan speed. |
22 | 22 | ||
23 | A sophisticated control system for the PWM outputs is designed into the | 23 | A sophisticated control system for the PWM outputs is designed into the |
24 | LM85 that allows fan speed to be adjusted automatically based on any of the | 24 | ADT7473 that allows fan speed to be adjusted automatically based on any of the |
25 | three temperature sensors. Each PWM output is individually adjustable and | 25 | three temperature sensors. Each PWM output is individually adjustable and |
26 | programmable. Once configured, the ADT7473 will adjust the PWM outputs in | 26 | programmable. Once configured, the ADT7473 will adjust the PWM outputs in |
27 | response to the measured temperatures without further host intervention. | 27 | response to the measured temperatures without further host intervention. |
@@ -46,14 +46,6 @@ from the raw value to get the temperature value. | |||
46 | The Analog Devices datasheet is very detailed and describes a procedure for | 46 | The Analog Devices datasheet is very detailed and describes a procedure for |
47 | determining an optimal configuration for the automatic PWM control. | 47 | determining an optimal configuration for the automatic PWM control. |
48 | 48 | ||
49 | Hardware Configurations | ||
50 | ----------------------- | ||
51 | |||
52 | The ADT7473 chips have an optional SMBALERT output that can be used to | ||
53 | signal the chipset in case a limit is exceeded or the temperature sensors | ||
54 | fail. Individual sensor interrupts can be masked so they won't trigger | ||
55 | SMBALERT. The SMBALERT output if configured replaces the PWM2 function. | ||
56 | |||
57 | Configuration Notes | 49 | Configuration Notes |
58 | ------------------- | 50 | ------------------- |
59 | 51 | ||
@@ -61,8 +53,8 @@ Besides standard interfaces driver adds the following: | |||
61 | 53 | ||
62 | * PWM Control | 54 | * PWM Control |
63 | 55 | ||
64 | * pwm#_auto_point1_pwm and pwm#_auto_point1_temp and | 56 | * pwm#_auto_point1_pwm and temp#_auto_point1_temp and |
65 | * pwm#_auto_point2_pwm and pwm#_auto_point2_temp - | 57 | * pwm#_auto_point2_pwm and temp#_auto_point2_temp - |
66 | 58 | ||
67 | point1: Set the pwm speed at a lower temperature bound. | 59 | point1: Set the pwm speed at a lower temperature bound. |
68 | point2: Set the pwm speed at a higher temperature bound. | 60 | point2: Set the pwm speed at a higher temperature bound. |