From: Michael Albaugh Date: Wed, 16 May 2007 22:45:09 +0000 (-0700) Subject: IB/ipath: Support blinking LEDs with an led_override file X-Git-Tag: v2.6.23-rc1~1085^2~68 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82466f00ec6ef0a5ca7ea8991c731af2ec561c7d;p=pandora-kernel.git IB/ipath: Support blinking LEDs with an led_override file When we want to find an InfiniPath HCA in a rack of nodes, it is often expeditious to blink the status LEDs via a userspace /sys file. A write-only led_override "file" is published per device. Writes to this file are interpreted as (string form) numbers, and the resulting value sent to ipath_set_led_override(). The upper eight bits are interpretted as a 4.4 fixed-point "frequency in Hertz", and the bottom two 4-bit values are alternately (D0..3, then D4..7) used by the board-specific LED-setting function to override the normal state. Signed-off-by: Michael Albaugh Signed-off-by: Roland Dreier --- Reading git-diff-tree failed