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Re: Interrupt routing issue on BCM1480.

To: Ralf Baechle <>
Subject: Re: Interrupt routing issue on BCM1480.
From: "Maciej W. Rozycki" <>
Date: Tue, 18 Nov 2008 22:47:35 +0000 (GMT)
Cc: Kaz Kylheku <>,
In-reply-to: <>
Original-recipient: rfc822;
References: <DDFD17CC94A9BD49A82147DDF7D545C50144C3F0@exchange.ZeugmaSystems.local> <>
User-agent: Alpine 1.10 (LFD 962 2008-03-14)
On Tue, 18 Nov 2008, Ralf Baechle wrote:

> will be wired in a system specific way to the host.  For the BCM91480
> that wiring seems to be to simply wire (or "or") all INTA pins together
> and connect that signal to the SOC, same for the remaining INTB..INTD.

 Interesting -- swizzling is the usual approach to spread the load.  
Though this platform's software-driven IRQ dispatcher we have is probably 
not smart enough to take advantage of such an arrangement anyway, so 
perhaps they didn't bother to optimise hardware.  The 91250A did use 


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