linux-kernel - Re: [PATCH] ARM: dts: omap3: Migrate AES from hwmods to sysc-omap2

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Date:   Tue, 5 May 2020 16:17:19 -0500
From:   Adam Ford <aford173@...il.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Linux-OMAP <linux-omap@...r.kernel.org>,
        Adam Ford-BE <aford@...conembedded.com>,
        Benoît Cousson <bcousson@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul@...an.com>,
        Russell King <linux@...linux.org.uk>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: dts: omap3: Migrate AES from hwmods to sysc-omap2

On Tue, May 5, 2020 at 1:42 PM Tony Lindgren <tony@...mide.com> wrote:
>
> * Adam Ford <aford173@...il.com> [200504 16:02]:
> > Various OMAP3 boards have two AES blocks, but only one is currently
> > available, because the hwmods are only configured for one.
> >
> > This patch migrates the hwmods for the AES engine to sysc-omap2
> > which allows the second AES crypto engine to become available.
> >
> >   omap-aes 480a6000.aes1: OMAP AES hw accel rev: 2.6
> >   omap-aes 480a6000.aes1: will run requests pump with realtime priority
> >   omap-aes 480c5000.aes2: OMAP AES hw accel rev: 2.6
> >   omap-aes 480c5000.aes2: will run requests pump with realtime priority
>
> Great :) Looks like I'm getting the following though:
>
> DTC     arch/arm/boot/dts/am3517-craneboard.dtb
> arch/arm/boot/dts/omap3.dtsi:160.39-184.5: ERROR (phandle_references):
> /ocp@...00000/target-module@...a6000:
> Reference to non-existent node or label "aes1_ick"
>
> Is this patch maybe missing a change for am3717 for the aes1_ick?

I am guessing it's the same issue that plagues the am3517 with a note
in the hwmods that stated noone seems to know which am3517's support
it and which don't.  The RNG was disabled on the 3517, so I am
guessing I'll do the same for AES.
I should have posted it as an RFC, because I don't have the proper IRQ
setup for the newly supported AES engine.  The interrupts that are
used for the original AES are listed as 'Resereved' in the AM3517 TRM.
I assume the second engine uses different interrupts.  I don't suppose
anyone know what it should be?

adam
>
> Regards,
>
> Tony