iMX31 power management

[thomas.nemeth@betatech.fr (Thomas Nemeth)]

Le lundi 30 ao?t 2010, Andy Green a ?crit?:
> On 08/30/10 13:44, Somebody in the thread at some point said:
>
> Hi -

    Hi Andy.


> >      I added in attachment the code I adapted from 2.6.22 so that
> > it integrates better with current kernels.
>
> I ported this similar stuff from the Freescale tree to 2.6.32 last
> December, it sleeps and wakes fine (using stop clock) on that txtr
> board since then.

    I did this piece of code because it wasn't in 2.6.34 mainline :)
    Should we make something to have it marged ?


> http://git.warmcat.com/cgi-bin/cgit/txtr-kernel/commit/?h=txtr-tracki
>ng&id=34685e9c378c865885ad6a8f2fc06fc36ad48482
>
> There was no enable_irq_wake(); platform support at that time so I

    I wasn't aware of that function. It indeed may be of a great help.
    I've seen that a lot of drivers use directly set_irq_wake(). Is
    there a "prefered" way of using this facility ?

    I think the set_wake() field in the irq_chip structure from
    arch/arm/plat-mxc/irq.c should be created, didn't it ?


> guess maybe there is now and you need to make sure your wake
> interrupts are marked as wake sources?

    In a more recent version of my pm.c source file, I have :
       __raw_writel(0, MXC_CCM_WIMR);
    in mx31_pm_prepare(), in order to enable all interrupts to wake the
    processor up. But to no use :(


    Thanks a lot.


Thomas.
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