• Stephen Warren's avatar
    Add a mailbox driver framework/uclass · 6238935d
    Stephen Warren authored
    A mailbox is a hardware mechanism for transferring small message and/or
    notifications between the CPU on which U-Boot runs and some other device
    such as an auxilliary CPU running firmware or a hardware module.
    
    This patch defines a standard API that connects mailbox clients to mailbox
    providers (drivers). Initially, DT is the only supported method for
    connecting the two.
    
    The DT binding specification (mailbox.txt) was taken from Linux kernel
    v4.5's Documentation/devicetree/bindings/mailbox/mailbox.txt.
    Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
    Acked-by: default avatarSimon Glass <sjg@chromium.org>
    6238935d
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