Changes from upstream #205
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This is not the right place to modify DMA memory protection values. Why not? These are designed to protect other AMP mode instances. Opening the entire SoC's memory for the USB DMA kind of defeats this purpose. Also, the driver cannot know how to configure these registers correctly, only opening up the whole SoC "works".
Add method to lock an MPUCFG entry. Locking means the value of the register cannot be changed until the SoC is reset.
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Summary
Impact
Testing