Re: OMAP3EVM not booting on l-o master

[Paul Walmsley <paul@xxxxxxxxx>]

Hi Kevin,

On Wed, 2 May 2012, Kevin Hilman wrote:

> >From 22726db6fc514cc5110db43fdf05d5afda8e4a59 Mon Sep 17 00:00:00 2001
> From: Kevin Hilman <khilman@xxxxxx>
> Date: Tue, 1 May 2012 07:06:42 -0700
> Subject: [PATCH] ARM: OMAP3: PM: leave PRCM interrupts disabled until
>  explicitly enabled.
> 
> By default, request_irq() will auto-enable the requested IRQ.
> 
> For PRCM interrupts, we may want to avoid that until the PM core code
> is fully ready to handle the interrupts.  This is particularily true
> for IO pad interrupts on OMAP3, which are shared between the hwmod
> core and the PRM core.
> 
> In order to avoid PRCM IO-chain interrupts until the PM core is ready
> to handle them, ready, set the IRQ_NOAUTOEN flag for the PRCM IO-chain
> interrupt,  which means it will remain disabled after request_irq().
> 
> Then, explicitly enable the PRCM interrupts after the request_irq() in
> the PM core (but not in the hwmod core.)
> 
> Special thanks to Tero Kristo for suggesting to isolate the fix to
> only the IO-chain interrupt on OMAP3 instead of all PRCM interrupts.
> 
> Tested-by: Afzal Mohammed <afzal@xxxxxx>
> Acked-by: Tero Kristo <t-kristo@xxxxxx>
> Cc: Paul Walmsley <paul@xxxxxxxxx>
> Signed-off-by: Kevin Hilman <khilman@xxxxxx>

Acked-by: Paul Walmsley <paul@xxxxxxxxx>

If for some reason it doesn't get in for 3.5, let me know and I'll queue 
with the other IO chain patches for 3.6 as we discussed.

- Paul
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