linux-kernel - Re: [PATCH v7 4/4] arm64: dts: Add Caninos Loucos Labrador v3

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Message-ID: <CAK8P3a0yGN80nJU0kcrvYGsSjpaNpU_nmu-ENwE3GMC_9DNBhg@mail.gmail.com>
Date:   Tue, 22 Sep 2020 10:32:06 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Matheus Castello <matheus@...tello.eng.br>,
        Olof Johansson <olof@...om.net>,
        Andreas Färber <afaerber@...e.de>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, edgar.righi@...tec.org.br,
        igor.lima@...tec.org.br, Helen Koike <helen.koike@...labora.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        DTML <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-actions@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH v7 4/4] arm64: dts: Add Caninos Loucos Labrador v3

On Tue, Sep 22, 2020 at 8:15 AM Manivannan Sadhasivam
<manivannan.sadhasivam@...aro.org> wrote:
> On Mon, Sep 21, 2020 at 11:43:02PM -0300, Matheus Castello wrote:
> > +     /* Labrador v3 firmware does not support PSCI */
>
> Oops. This is unfortunate... I'm not sure if this is even acceptable for
> ARM64 machines.
>
> Let me add Olof and Arnd...

Adding Catalin and Will for additional input as well, this is more their
area than ours.

I don't think we have formalized this as a policy, but we clearly don't
want new boards to use the spin table hack. As there are other
boards using psci on the same chip, I don't think this is a
hardware bug.

Matheus: can you explain what keeps you from fixing the
bootloader instead?

      Arnd