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  • Finn Thain's avatar
    nubus: Add support for the driver model · 7f86c765
    Finn Thain authored and Geert Uytterhoeven's avatar Geert Uytterhoeven committed
    
    
    This patch brings basic support for the Linux Driver Model to the
    NuBus subsystem.
    
    For flexibility, the matching of boards with drivers is left up to the
    drivers. This is also the approach taken by NetBSD. A board may have
    many functions, and drivers may have to consider many functional
    resources and board resources in order to match a device.
    
    This implementation does not bind drivers to resources (nor does it bind
    many drivers to the same board). Apple's NuBus declaration ROM design
    is flexible enough to allow that, but I don't see a need to support it
    as we don't use the "slot zero" resources (in the main logic board ROM).
    
    Eliminate the global nubus_boards linked list by rewriting the procfs
    board iterator around bus_for_each_dev(). Hence the nubus device refcount
    can be used to determine the lifespan of board objects.
    
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    Tested-by: default avatarStan Johnson <userm57@yahoo.com>
    Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
    Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
    7f86c765