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I think you are misunderstanding the situation. Both chips contain a CPU from ARM, so far so good. For the rest of the chip allwinner uses modern, well documen
by pawadu 10y ago
I think you are misunderstanding the situation.
Both chips contain a CPU from ARM, so far so good. For the rest of the chip allwinner uses modern, well documented and battle proven components mainly from ARM. To save a few cents, broadcom uses undocumented home-gown crap that nobody understands. Just look at their crazy interrupt controller that can not do true multicore - which probably is one of the reasons pi3 is overheating.
- revelation 10y agoThat's what I'm saying. The reason there is register documentation for that Allwinner CPU is because it's a bog standard ARM. They pretty much just copied it. That doesn't really speak to Allwinners open-source embracing nature.
- pawadu 10y agoWell, they paid good money to license the ARM components and their documentation actually adds to the standard ARM documentation by filling in some device-specific gaps. But not everything here comes from ARM, look for example at their power management documentation which is (as always) proprietary. Can you point me to the same information in the broadcom datasheet?