Hi Marc,


2016-08-01 16:46 GMT+09:00 Marc Zyngier [off-list ref]:

On 01/08/16 02:28, Masahiro Yamada wrote:

quoted

2016-07-29 17:10 GMT+09:00 Marc Zyngier [off-list ref]:

quoted

On 29/07/16 04:53, Masahiro Yamada wrote:

quoted

Hi.


I noticed my board would not work any more
when pulling recent updates.


I did "git-bisect" and I found the following commit is it.

It would help if you did post the log showing the failure.

What if you apply the following patch:

https://git.kernel.org/cgit/linux/kernel/git/maz/arm-platforms.git/diff/arch/arm64/boot/dts/socionext/uniphier-ph1-ld20.dtsi?h=timers/level-trigger&id=95e1fd920fcadce81626cfa9bd6af1a361f17e58

Hi Mark,

Yes, it worked.

But I did not understand why you changed the 3rd cell to 0xf08.


The binding of arm,gic-v3.txt says as follows:


  The 3rd cell is the flags, encoded as follows:
        bits[3:0] trigger type and level flags.
                1 = edge triggered
                4 = level triggered


Only 1 and 4 are defined for the bits[3:0].

Ah, I didn't realize you were using GICv3.

If you look at the documentation for the A72 timers:
http://infocenter.arm.com/help/topic/com.arm.doc.100095_0003_05_en/way1382454511590.html

You'll notice that all timers have an active-low output. Switching to
"level triggered" fixes the issue in general.

quoted

0xf04 worked, too.

Which is correct?

None of them. 0x04 is the correct answer (as we don't encode the
affinity in the 3rd cell.

Thank you!





-- 
Best Regards
Masahiro Yamada