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authorMichal Marek <mmarek@suse.cz>2010-10-27 22:15:57 (GMT)
committerMichal Marek <mmarek@suse.cz>2010-10-27 22:15:57 (GMT)
commitb74b953b998bcc2db91b694446f3a2619ec32de6 (patch)
tree6ce24caabd730f6ae9287ed0676ec32e6ff31e9d /Documentation/hwmon/emc2103
parentabb438526201c6a79949ad45375c051b6681c253 (diff)
parentf6f94e2ab1b33f0082ac22d71f66385a60d8157f (diff)
downloadlinux-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).
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+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.