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author | Michal Marek <mmarek@suse.cz> | 2010-10-27 22:15:57 (GMT) |
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committer | Michal Marek <mmarek@suse.cz> | 2010-10-27 22:15:57 (GMT) |
commit | b74b953b998bcc2db91b694446f3a2619ec32de6 (patch) | |
tree | 6ce24caabd730f6ae9287ed0676ec32e6ff31e9d /Documentation/hwmon/emc2103 | |
parent | abb438526201c6a79949ad45375c051b6681c253 (diff) | |
parent | f6f94e2ab1b33f0082ac22d71f66385a60d8157f (diff) | |
download | linux-fsl-qoriq-b74b953b998bcc2db91b694446f3a2619ec32de6.tar.xz |
Merge commit 'v2.6.36' into kbuild/misc
Update to be able to fix a recent change to scripts/basic/docproc.c
(commit eda603f).
Diffstat (limited to 'Documentation/hwmon/emc2103')
-rw-r--r-- | Documentation/hwmon/emc2103 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/hwmon/emc2103 b/Documentation/hwmon/emc2103 new file mode 100644 index 0000000..a12b2c1 --- /dev/null +++ b/Documentation/hwmon/emc2103 @@ -0,0 +1,33 @@ +Kernel driver emc2103 +====================== + +Supported chips: + * SMSC EMC2103 + Addresses scanned: I2C 0x2e + Prefix: 'emc2103' + Datasheet: Not public + +Authors: + Steve Glendinning <steve.glendinning@smsc.com> + +Description +----------- + +The Standard Microsystems Corporation (SMSC) EMC2103 chips +contain up to 4 temperature sensors and a single fan controller. + +Fan rotation speeds are reported in RPM (rotations per minute). An alarm is +triggered if the rotation speed has dropped below a programmable limit. Fan +readings can be divided by a programmable divider (1, 2, 4 or 8) to give +the readings more range or accuracy. Not all RPM values can accurately be +represented, so some rounding is done. With a divider of 1, the lowest +representable value is 480 RPM. + +This driver supports RPM based control, to use this a fan target +should be written to fan1_target and pwm1_enable should be set to 3. + +The 2103-2 and 2103-4 variants have a third temperature sensor, which can +be connected to two anti-parallel diodes. These values can be read +as temp3 and temp4. If only one diode is attached to this channel, temp4 +will show as "fault". The module parameter "apd=0" can be used to suppress +this 4th channel when anti-parallel diodes are not fitted. |