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  • David Gibson's avatar
    Device tree aware EMAC driver · 1d3bb996
    David Gibson authored
    
    
    Based on BenH's earlier work, this is a new version of the EMAC driver
    for the built-in ethernet found on PowerPC 4xx embedded CPUs.  The
    same ASIC is also found in the Axon bridge chip.  This new version is
    designed to work in the arch/powerpc tree, using the device tree to
    probe the device, rather than the old and ugly arch/ppc OCP layer.
    
    This driver is designed to sit alongside the old driver (that lies in
    drivers/net/ibm_emac and this one in drivers/net/ibm_newemac).  The
    old driver is left in place to support arch/ppc until arch/ppc itself
    reaches its final demise (not too long now, with luck).
    
    This driver still has a number of things that could do with cleaning
    up, but I think they can be fixed up after merging.  Specifically:
    	- Should be adjusted to properly use the dma mapping API.
    Axon needs this.
    	- Probe logic needs reworking, in conjuction with the general
    probing code for of_platform devices.  The dependencies here between
    EMAC, MAL, ZMII etc. make this complicated.  At present, it usually
    works, because we initialize and register the sub-drivers before the
    EMAC driver itself, and (being in driver code) runs after the devices
    themselves have been instantiated from the device tree.
    
    Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    1d3bb996