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    USB: EHCI: make ehci-orion a separate driver · a76dd463
    Manjunath Goudar 提交于
    Separate the Orion host controller driver from ehci-hcd host
    code into its own driver module because of following reason.
    
    With the multiplatform changes in arm-soc tree, it becomes
    possible to enable the mvebu platform (which uses
    ehci-orion) at the same time as other platforms that require
    a conflicting EHCI bus glue. At the moment, this results
    in a warning like
    
    drivers/usb/host/ehci-hcd.c:1297:0: warning: "PLATFORM_DRIVER" redefined [enabled by default]
    drivers/usb/host/ehci-hcd.c:1277:0: note: this is the location of the previous definition
    drivers/usb/host/ehci-orion.c:334:31: warning: 'ehci_orion_driver' defined but not used [-Wunused-variable]
    
    and an ehci driver that only works on one of them.
    
    With the infrastructure added by Alan Stern in patch 3e023203
    "USB: EHCI: prepare to make ehci-hcd a library module", we can
    avoid this problem by turning a bus glue into a separate
    module, as we do here for the orion bus glue.
    
    An earlier version of this patch was included in 3.9 but caused
    a regression there, which has subsequently been fixed.
    
    While we are here, use the opportunity to disabiguate the two
    Marvell EHCI controller implementations in Kconfig.
    
    In V4 (arnd):
    - Improve Kconfig text
    
    In V3:
    - More detail provided in commit message regarding this patch.
    - Replaced hcd_name string "ehci-orion" into "orion-ehci".
    - MODULE_LICENSE is GPL v2.
    - In ehci_init_driver calling second argument passed  as NULL instead of
      ehci_orion_overrides because ehci_orion_overrides is removed.
    
    In V2:
    - Tegra patch related changes removed from this patch.
    Signed-off-by: NManjunath Goudar <manjunath.goudar@linaro.org>
    Signed-off-by: NArnd Bergmann <arnd@arndb.de>
    Acked-by: NJason Cooper <jason@lakedaemon.net>
    Tested-by: NAndrew Lunn <andrew@lunn.ch>
    Acked-by: NAlan Stern <stern@rowland.harvard.edu>
    Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    a76dd463
ehci-hcd.c 38.6 KB