diff options
author | Amerigo Wang <amwang@redhat.com> | 2010-03-05 16:17:26 -0500 |
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committer | Jean Delvare <khali@linux-fr.org> | 2010-03-05 16:17:26 -0500 |
commit | a0a5e3488a51c46f383c5faa86b53828e30ce153 (patch) | |
tree | be2df675c0fb15d477591d946ef6200cfecdfe69 /Documentation/hwmon | |
parent | dc71afe5ac7e8d049bb991330518e4c898a7d92e (diff) |
hwmon: Remove the deprecated adt7473 driver
adt7473 driver is obsoleted by adt7475 driver. And it is scheduled
to be removed in Feb 2010.
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r-- | Documentation/hwmon/adt7473 | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473 deleted file mode 100644 index 446612bd1fb9..000000000000 --- a/Documentation/hwmon/adt7473 +++ /dev/null | |||
@@ -1,74 +0,0 @@ | |||
1 | Kernel driver adt7473 | ||
2 | ====================== | ||
3 | |||
4 | Supported chips: | ||
5 | * Analog Devices ADT7473 | ||
6 | Prefix: 'adt7473' | ||
7 | Addresses scanned: I2C 0x2C, 0x2D, 0x2E | ||
8 | Datasheet: Publicly available at the Analog Devices website | ||
9 | |||
10 | Author: Darrick J. Wong | ||
11 | |||
12 | This driver is depreacted, please use the adt7475 driver instead. | ||
13 | |||
14 | Description | ||
15 | ----------- | ||
16 | |||
17 | This driver implements support for the Analog Devices ADT7473 chip family. | ||
18 | |||
19 | The ADT7473 uses the 2-wire interface compatible with the SMBUS 2.0 | ||
20 | specification. Using an analog to digital converter it measures three (3) | ||
21 | temperatures and two (2) voltages. It has four (4) 16-bit counters for | ||
22 | measuring fan speed. There are three (3) PWM outputs that can be used | ||
23 | to control fan speed. | ||
24 | |||
25 | A sophisticated control system for the PWM outputs is designed into the | ||
26 | ADT7473 that allows fan speed to be adjusted automatically based on any of the | ||
27 | three temperature sensors. Each PWM output is individually adjustable and | ||
28 | programmable. Once configured, the ADT7473 will adjust the PWM outputs in | ||
29 | response to the measured temperatures without further host intervention. | ||
30 | This feature can also be disabled for manual control of the PWM's. | ||
31 | |||
32 | Each of the measured inputs (voltage, temperature, fan speed) has | ||
33 | corresponding high/low limit values. The ADT7473 will signal an ALARM if | ||
34 | any measured value exceeds either limit. | ||
35 | |||
36 | The ADT7473 samples all inputs continuously. The driver will not read | ||
37 | the registers more often than once every other second. Further, | ||
38 | configuration data is only read once per minute. | ||
39 | |||
40 | Special Features | ||
41 | ---------------- | ||
42 | |||
43 | The ADT7473 have a 10-bit ADC and can therefore measure temperatures | ||
44 | with 0.25 degC resolution. Temperature readings can be configured either | ||
45 | for twos complement format or "Offset 64" format, wherein 63 is subtracted | ||
46 | from the raw value to get the temperature value. | ||
47 | |||
48 | The Analog Devices datasheet is very detailed and describes a procedure for | ||
49 | determining an optimal configuration for the automatic PWM control. | ||
50 | |||
51 | Configuration Notes | ||
52 | ------------------- | ||
53 | |||
54 | Besides standard interfaces driver adds the following: | ||
55 | |||
56 | * PWM Control | ||
57 | |||
58 | * pwm#_auto_point1_pwm and temp#_auto_point1_temp and | ||
59 | * pwm#_auto_point2_pwm and temp#_auto_point2_temp - | ||
60 | |||
61 | point1: Set the pwm speed at a lower temperature bound. | ||
62 | point2: Set the pwm speed at a higher temperature bound. | ||
63 | |||
64 | The ADT7473 will scale the pwm between the lower and higher pwm speed when | ||
65 | the temperature is between the two temperature boundaries. PWM values range | ||
66 | from 0 (off) to 255 (full speed). Fan speed will be set to maximum when the | ||
67 | temperature sensor associated with the PWM control exceeds temp#_max. | ||
68 | |||
69 | Notes | ||
70 | ----- | ||
71 | |||
72 | The NVIDIA binary driver presents an ADT7473 chip via an on-card i2c bus. | ||
73 | Unfortunately, they fail to set the i2c adapter class, so this driver may | ||
74 | fail to find the chip until the nvidia driver is patched. | ||