[PATCH] ARM: realview: DT support for the PBA8 and PBX-A9

Linus Walleij linus.walleij at linaro.org
Sat Mar 5 09:08:27 PST 2016


On Fri, Feb 26, 2016 at 8:01 PM, Robin Murphy <robin.murphy at arm.com> wrote:

> As with the Versatile AB I scored from a junk pile, trying to boot a
> full userspace from SD card makes slow progress through a storm of data
> transfer errors and eventually dies. USB is similarly flaky, with occasional
> device resets and command errors, but I don't see that it's this patch's
> fault

Neither SD/MMC or USB mass storage boots ever worked on these
shaky PL180 and ISP1760 drivers. Only NFS boot really works.

I think PL180 can be made to work if we implement a pure polling mode
(not IRQ, not DMA) to read it.

Yours,
Linus Walleij



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