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    rapidio: rework device hierarchy and introduce mport class of devices · 2aaf308b
    Alexandre Bounine authored
    
    
    This patch removes an artificial RapidIO bus root device and establishes
    actual device hierarchy by providing reference to real parent devices.
    It also introduces device class for RapidIO controller devices (on-chip
    or an eternal bridge, known as "mport").
    
    Existing implementation was sufficient for SoC-based platforms that have
    a single RapidIO controller.  With introduction of devices using
    multiple RapidIO controllers and PCIe-to-RapidIO bridges the old scheme
    is very limiting or does not work at all.  The implemented changes allow
    to properly reference platform's local RapidIO mport devices and provide
    device details needed for upper layers.
    
    This change to RapidIO device hierarchy does not break any known
    existing kernel or user space interfaces.
    
    Signed-off-by: default avatarAlexandre Bounine <alexandre.bounine@idt.com>
    Cc: Matt Porter <mporter@kernel.crashing.org>
    Cc: Li Yang <leoli@freescale.com>
    Cc: Kumar Gala <galak@kernel.crashing.org>
    Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
    Cc: Stef van Os <stef.van.os@prodrive-technologies.com>
    Cc: Jerry Jacobs <jerry.jacobs@prodrive-technologies.com>
    Cc: Arno Tiemersma <arno.tiemersma@prodrive-technologies.com>
    Cc: Rob Landley <rob@landley.net>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    2aaf308b