svn commit: trunk/busybox/docs

[vapier at busybox.net]

Author: vapier
Date: 2007-06-28 10:13:51 -0700 (Thu, 28 Jun 2007)
New Revision: 18967

Log:
document firmware support

Modified:
   trunk/busybox/docs/mdev.txt


Changeset:
Modified: trunk/busybox/docs/mdev.txt
===================================================================
--- trunk/busybox/docs/mdev.txt	2007-06-28 15:55:00 UTC (rev 18966)
+++ trunk/busybox/docs/mdev.txt	2007-06-28 17:13:51 UTC (rev 18967)
@@ -66,3 +66,15 @@
 
 For your convenience, the shell env var $MDEV is set to the device name.  So if
 the device 'hdc' was matched, MDEV would be set to "hdc".
+
+----------
+ FIRMWARE
+----------
+
+Some kernel device drivers need to request firmware at runtime in order to
+properly initialize a device.  Place all such firmware files into the
+/lib/firmware/ directory.  At runtime, the kernel will invoke mdev with the
+filename of the firmware which mdev will load out of /lib/firmware/ and into
+the kernel via the sysfs interface.  The exact filename is hardcoded in the
+kernel, so look there if you need to want to know what to name the file in
+userspace.