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document firmware support

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Mike Frysinger 2007-06-28 17:13:51 +00:00
parent 12d2129d50
commit ae7f7ebcb7
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docs/mdev.txt
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@ -66,3 +66,15 @@ command to the shell), so make sure you have a shell installed at /bin/sh.
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.