netdev - Re: [net-next: PATCH v2 5/5] net: mvpp2: enable ACPI support in the driver

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Message-ID: <20180103111611.GB21230@xora-haswell>
Date:   Wed, 3 Jan 2018 11:16:11 +0000
From:   graeme.gregory@...aro.org
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Marcin Wojtas <mw@...ihalf.com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-acpi@...r.kernel.org, davem@...emloft.net,
        linux@...linux.org.uk, rafael.j.wysocki@...el.com,
        f.fainelli@...il.com, antoine.tenart@...e-electrons.com,
        thomas.petazzoni@...e-electrons.com,
        gregory.clement@...e-electrons.com,
        ezequiel.garcia@...e-electrons.com, nadavh@...vell.com,
        neta@...vell.com, ard.biesheuvel@...aro.org, jaz@...ihalf.com,
        tn@...ihalf.com
Subject: Re: [net-next: PATCH v2 5/5] net: mvpp2: enable ACPI support in the
 driver

On Sun, Dec 31, 2017 at 08:23:54PM +0100, Andrew Lunn wrote:
> > * Modify way of obtaining interrupts - with ACPI they are resources
> >   bound to struct platform_device and it's not possible to obtain
> >   them directly from the child node. Hence a formula is used, depending
> >   on the port_id and number of possible CPUs.
> 
> Hi Marcin
> 
> I know nothing about ACPI. Is this limitation with respect to
> interrupts fundamental to ACPI, or just that nobody has implemented
> flexible interrupt support yet?
> 
The infrastructure is there to traverse trees of children, but I don't
think there any helper functions.

Graeme


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