[PATCH] ARM: rockchip: restore dapswjdp after suspend
dianders at chromium.org
Thu May 21 08:40:55 PDT 2015
On Wed, May 20, 2015 at 7:02 PM, Huang, Tao <huangtao at rock-chips.com> wrote:
>> It turns out that's not a safe assumption. In some cases (pending
>> interrupts) it's possible that the WFI might act as a no-op and the
>> MaskROM will never run.
> I don't think this can happen. It seems we set PMU_GLOBAL_INT_DISABLE
> bit, which means in power off flow, the IRQ will not accepted until the
> ARM is power off. Do you see the SGRF_CPU_CON0 is 0 after resume?
>From testing, it appears that it can happen that the WFI might act as a no-op.
...but you're right in pointing out that unless we can solve the
PMU_GLOBAL_INT_DISABLE() problem then this patch here to fix
DAPDEVICEEN isn't too useful. I was hoping to fix the
<https://chromium-review.googlesource.com/#/c/272442/> or find a
similar solution. ...if we can's solve that though, then I'm not sure
what to suggest.
> Anyway, restore the value is okay, which make the code more symmetrically
OK. Heiko: applying this won't hurt, but it will only be useful if we
find a way to return from the WFI successfully...
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