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As the Renesas Reduced Pin Count Interface may be locked by TF-A, it is disabled by default[1]. When unlocked, TF-A passes a DT fragment to enable it, which is applied to the U-Boot DT[2]. Unlike the memory layout, the RPC-IF enablement is not propagated to subsequent software. Hence e.g. Linux cannot know if the RPC-IF is locked or not, and will lock-up when trying to access the RPC-IF when locked. Fix this by checking if the RPC-IF is enabled in the TF-A DT fragment, and setting the status of the RPC-IF device node in the target DT, if present, to "okay". Do this only when a "flash" subnode is found, to avoid errors in subsequent software when the RPC-IF is not intended to be used. Note that this requires the status of the RPC-IF node to be set to "disabled" in the target DT, just like in the U-Boot DT. [1] commit |
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blanche | ||
condor | ||
draak | ||
eagle | ||
ebisu | ||
falcon | ||
gose | ||
grpeach | ||
koelsch | ||
lager | ||
porter | ||
r2dplus | ||
rcar-common | ||
salvator-x | ||
silk | ||
stout | ||
ulcb |