linux-kernel - Re: [PATCH v2 5/5] arm64: dts: renesas: r8a7795: add ccree binding

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Message-ID: <CAMuHMdUX874g6pAz-Ze-yA3S+6aOhzUkfGN9wmQUhy-y0f7dMw@mail.gmail.com>
Date:   Fri, 1 Jun 2018 10:12:24 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Gilad Ben-Yossef <gilad@...yossef.com>
Cc:     Simon Horman <horms@...ge.net.au>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Ofir Drang <ofir.drang@....com>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>
Subject: Re: [PATCH v2 5/5] arm64: dts: renesas: r8a7795: add ccree binding

Hi Gilad,

On Thu, May 31, 2018 at 1:55 PM, Gilad Ben-Yossef <gilad@...yossef.com> wrote:
> On Tue, May 29, 2018 at 7:19 PM, Simon Horman <horms@...ge.net.au> wrote:
>> On Thu, May 24, 2018 at 03:19:10PM +0100, Gilad Ben-Yossef wrote:
>>> Add bindings for CryptoCell instance in the SoC.
>>>
>>> Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
>>
>> In so far as I can review the details of this (which is not much) this
>> looks fine to me. I am, however, a little unclear in when it should be
>> accepted.
>
> Since Herbert Xu ACKed the driver changes, I would say the only gating
> commit is Geert's CR clock patch.

These are queued for v4.19.

> If that one is in, than I would say this one should go in as well.

As the device node now has a power-domains property, the genpd code will
try to attach it to the CPG/MSSR PM Domain, which is a clock domain.
In the absence of the clock patch, the device's module clock cannot be
found, and dev_pm_domain_attach() and thus platform_drv_probe() will fail,
before calling the device driver's .probe() function.

So there is no longer a dependency on the clock patch, and the DT patch can
go in in parallel (although I prefer its subject to be changed
s/binding/device device/).

Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds