linux-kernel - Re: [PATCH v5 2/6] dt-bindings: PCI: renesas,pci-rcar-gen2: Add device tree support for r9a06g032

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAMuHMdVv-qCTyMQzr8ALCP-UmojZe9=NOrExPieJNV2300yzbQ@mail.gmail.com>
Date:   Tue, 3 May 2022 11:37:31 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Rob Herring <robh@...nel.org>,
        Herve Codina <herve.codina@...tlin.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        linux-pci <linux-pci@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Clement Leger <clement.leger@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH v5 2/6] dt-bindings: PCI: renesas,pci-rcar-gen2: Add
 device tree support for r9a06g032

Hi Krzysztof,

On Tue, May 3, 2022 at 11:29 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
> On 03/05/2022 08:51, Geert Uytterhoeven wrote:
> >>>> This should not be a reason why a property is or is not required. Either
> >>>> this is required for device operation or not. If it is required, should
> >>>> be in the bindings. Otherwise what are you going to do in the future?
> >>>> Add a required property breaking the ABI?
> >>>
> >>> The problem is that there are no bindings for the reset controller
> >>> (actually the reset controller feature of the system-controller) yet.
> >>> Yeah, we can just add #reset-cells = <1> to the system-controller
> >>> device node, but we cannot add the actual resets properties to the
> >>> consumers, until the actual cell values are defined.
> >>
> >> Sounds like you should implement providers first. Or just live with the
> >> warning as a reminder to implement the reset provider?
> >
> > I'd go for the latter. The upstream r9a06g032.dtsi is still under active
> > development. Until very recently, the only device supported was the
> > serial console.
>
> For clocks we use in such cases fixed-clock placeholders or empty
> phandles. Maybe something like that would work here as well?

I don't think that works for resets.
Besides, the driver doesn't need or use the reset anyway.

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