Re: [PATCH v2 1/4] pci: iProc: define Broadcom iProc PCIe binding

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux