Messages in this thread | | | Date | Sun, 14 Dec 2014 10:48:01 +0100 | From | Arend van Spriel <> | Subject | Re: [PATCH v2 1/4] pci: iProc: define Broadcom iProc PCIe binding |
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On 12/13/14 20:46, Arnd Bergmann wrote: > On Saturday 13 December 2014 11:05:52 Arend van Spriel wrote: >> >> Makes sense. I think that is what Hauke meant by "adding >> additional support for registering to bcma". So the discovery info is a >> piece of read-only memory in the chip. Its address is stored in the >> chipcommon core register space. BCMA parses that memory blob resulting >> in a list of cores which register address info. We could add DT support >> in BCMA matching the compatible string and register a core for it. > > Ah, interesting idea. That would mirror what we do for drivers/amba, > I like the idea.
+ Rafal
Let's explore this. Although I don't have the iProc hardware to verify it.
>> However, apart from the discovery info a "discoverable ARM AXI" chip has >> a register space per core that provides common procedures like >> enable/disable, reset, core status, which are implemented in BCMA. I am >> not seeing that register space in the DT examples so I guess this IP >> block is not there for iProc chips. > > I wouldn't draw conclusions from the absence of some node. Maybe these > registers are present but just not used by the original BSP.
I do not intend to. We have raised the question internally to iProc chip designers.
Regards, Arend
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