• Thierry Reding's avatar
    firmware: tegra: Add BPMP support · 983de5f9
    Thierry Reding authored
    The Boot and Power Management Processor (BPMP) is a co-processor found
    on Tegra SoCs. It is designed to handle the early stages of the boot
    process and offload power management tasks (such as clocks, resets,
    powergates, ...) as well as system control services.
    
    Compared to the ARM SCPI, the services provided by BPMP are message-
    based rather than method-based. The BPMP firmware driver provides the
    services to transmit data to and receive data from the BPMP. Users can
    also register a Message ReQuest (MRQ), for which a service routine will
    be run when a corresponding event is received from the firmware.
    
    A set of messages, called the BPMP ABI, are specified for a number of
    different services provided by the BPMP (such as clocks or resets).
    
    Based on work by Sivaram Nair <sivaramn@nvidia.com> and Joseph Lo
    <josephl@nvidia.com>.
    Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
    983de5f9
bpmp.c 19.5 KB