Messages in this thread | | | Date | Tue, 25 Sep 2012 11:11:42 +0200 | From | Sebastian Hesselbarth <> | Subject | Re: [PATCH 5/6] ARM: dove: Remove watchdog from DT |
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On 09/25/2012 07:35 AM, Andrew Lunn wrote: > On Tue, Sep 25, 2012 at 02:02:17AM +0200, Sebastian Hesselbarth wrote: >> The watchdog on dove requires an interrupt that is not yet >> available on DT. Therefore, the watchdog DT node is removed >> until the corresponding chained intc is available. > > Just for my understanding: Is the problem here: > > /* Clear watchdog timer interrupt */ > reg = readl(BRIDGE_CAUSE); > reg&= ~WDT_INT_REQ; > writel(reg, BRIDGE_CAUSE); > > I ask, because there is no need to pass an interrupt in the DT node. > > It is clear to me that bit of code above needs cleaning up sometime > soon.
Andrew,
maybe I mixed up wdt and rtc here. It's not a big deal as wdt isn't used at all on dove. Passing the irq on DT will require proper irq handler for the bridge irqs. I had a discussion about chained irq vs shared irq handlers a while ago with Gregory to reuse mvebu code for dove and I finally implemented a chained irq for the bridge irqs.
I am not sure how wdt is implemented on Armada 370/XP but AFAIK they don't have a bridge irq cause register. But having a chained irq handler for the bridge irqs and power management irqs on dove will allow to share wdt and rtc on dove and kirkwood and maybe even allow us to share the timer with armada 370/xp.
I didn't try to post all the dove on mach-mvebu patches in the current release cycle, because mach-mvebu is still evolving to fast for me to keep up with my limited spare time. But I have dove running on mach-mvebu...
Sebastian
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