2016-08-12 23:06 GMT+02:00 Stephen Warren <swar...@wwwdotorg.org>:
> From: Stephen Warren <swar...@nvidia.com>
>
> When the set_mode() function runs, the SPI bus is not active, and hence
> the clocks to the SPI controller are not running. Any register read/write
> at this time will hang the CPU. Remove the code from set_mode() that does
> this, and move it to the correct place in claim_bus().
>
> This essentially reverts and re-implements the patch mentioned in the
> fixes tag below. I'm not sure how the original could ever have worked on
> any Tegra platform; it certainly breaks the only Tegra board I have that
> uses SPI.
Hi Stephen.
This has most definitely worked for me on both Tegra2 (colibri_t20)
and Tegra3(colibri_t30). Though I am using a 2015.04 u-boot which was
the release when I wrote this patch, and I haven't actually tried any
later releases. Something happened along the way that "broke" it?
>
> Fixes: 5cb1b7b395c0 ("spi: tegra20: Add support for mode selection")
> Cc: Mirza Krak <mirza.k...@hostmobility.com>
> Signed-off-by: Stephen Warren <swar...@nvidia.com>
> ---
> As far as I can tell, the fixed patch was never CC'd to any Tegra
> maintainer:-(
This patch was one of my first contributions to an open-source project
and I might have missed a few steps, like CC the Tegra maintainers.
I know better now, sorry for any inconvenience caused by this.
--
Med Vänliga Hälsningar / Best Regards
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Mirza Krak
Host Mobility AB
mirza.k...@hostmobility.com
Anders Personsgatan 12, 416 64 Göteborg
Sweden
http://www.hostmobility.com
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