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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 8 Nov 2022 20:19:10 +0100
Message-ID: <CAMuHMdU=K0o6KHVPUdfEu0tkH8kDMBg-WaRFcYS7r=azWEnfTQ@mail.gmail.com>
Subject: Re: [PATCH v5 7/7] riscv: configs: defconfig: Enable Renesas RZ/Five SoC
To:     "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Magnus Damm <magnus.damm@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Heiko Stuebner <heiko@sntech.de>,
        Conor Dooley <conor.dooley@microchip.com>,
        Guo Ren <guoren@kernel.org>, Anup Patel <anup@brainfault.org>,
        Atish Patra <atishp@rivosinc.com>,
        Heinrich Schuchardt <heinrich.schuchardt@canonical.com>,
        devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
        Biju Das <biju.das.jz@bp.renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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Hi Prabhakar,

On Tue, Nov 8, 2022 at 6:23 PM Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> On Tue, Nov 8, 2022 at 4:12 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Tue, Nov 8, 2022 at 5:07 PM Lad, Prabhakar
> > <prabhakar.csengg@gmail.com> wrote:
> > > On Tue, Nov 8, 2022 at 3:52 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > > > On Fri, Oct 28, 2022 at 6:59 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
> > > > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > > >
> > > > > Enable Renesas RZ/Five SoC config in defconfig. It allows the default
> > > > > upstream kernel to boot on RZ/Five SMARC EVK board.
> > > > >
> > > > > Alongside enable SERIAL_SH_SCI config so that the serial driver used by
> > > > > RZ/Five SoC is built-in.
> > > > >
> > > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > > > > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > > > > ---
> > > > > v4 -> v5
> > > > > * No change
> > > > >
> > > > > v3 -> v4
> > > > > * Explicitly enabled ARCH_R9A07G043 config (note I have restored the RB
> > > > >   tags with this change)
> > > > > * Used riscv instead of RISC-V in subject line
> > > >
> > > > Thanks for the update!
> > > >
> > > > > --- a/arch/riscv/configs/defconfig
> > > > > +++ b/arch/riscv/configs/defconfig
> > > > > @@ -29,6 +29,8 @@ CONFIG_SOC_MICROCHIP_POLARFIRE=y
> > > > >  CONFIG_SOC_SIFIVE=y
> > > > >  CONFIG_SOC_STARFIVE=y
> > > > >  CONFIG_SOC_VIRT=y
> > > > > +CONFIG_ARCH_RENESAS=y
> > > > > +CONFIG_ARCH_R9A07G043=y
> > > >
> > > > You forgot to refresh after moving ARCH_RENESAS in v5 of "riscv:
> > > > Kconfig.socs: Add ARCH_RENESAS kconfig option", and after relying on
> > > > ARCH_R9A07G043 in drivers/soc/renesas/Kconfig.
> > > >
> > > Sorry I missed your point here, could you please elaborate.
> >
> > I mean that the options have moved, so you should update
> > your patch like this:
> >
> Ouch got that.
>
> >     --- a/arch/riscv/configs/defconfig
> >     +++ b/arch/riscv/configs/defconfig
> >     @@ -26,11 +26,10 @@ CONFIG_EXPERT=y
> >      # CONFIG_SYSFS_SYSCALL is not set
> >      CONFIG_PROFILING=y
> >      CONFIG_SOC_MICROCHIP_POLARFIRE=y
> >     +CONFIG_ARCH_RENESAS=y
> >      CONFIG_SOC_SIFIVE=y
> >      CONFIG_SOC_STARFIVE=y
> >      CONFIG_SOC_VIRT=y
> >     -CONFIG_ARCH_RENESAS=y
> >     -CONFIG_ARCH_R9A07G043=y
> >      CONFIG_SMP=y
> >      CONFIG_HOTPLUG_CPU=y
> >      CONFIG_PM=y
> >     @@ -163,6 +159,7 @@ CONFIG_MAILBOX=y
> >      CONFIG_RPMSG_CHAR=y
> >      CONFIG_RPMSG_CTRL=y
> >      CONFIG_RPMSG_VIRTIO=y
> >     +CONFIG_ARCH_R9A07G043=y
> >      CONFIG_EXT4_FS=y
> >      CONFIG_EXT4_FS_POSIX_ACL=y
> >      CONFIG_EXT4_FS_SECURITY=y
> >
> > > > >  CONFIG_SMP=y
> > > > >  CONFIG_HOTPLUG_CPU=y
> > > > >  CONFIG_PM=y
> > > >
> > > > PM and GPIOLIB are auto-selected by ARCH_R9A07G043 (through ARCH_RZG2L)
> > > > resp. SOC_RENESAS, so they can be dropped.  But it's better to do this
> > > > after the release of v6.2-rc1, when all pieces have fallen together.
> > > >
> > > Are you suggesting dropping it from defconfig?
> >
> > Yes, but not right now, as that would make it depend on my
> > renesas-drivers-for-v6.2 branch to keep them enabled.
> >
> I was wondering if that's required by other platforms though.
> CONFIG_PM was added for VIRT machine and GPIOLIB for HiFive.

Does that matter? They would still get it, as long as they use the
defconfig.

If you want to remove unwanted platforms from your configuration,
you do that in the .config file, not in the defconfig file.
If you have CONFIG_PM=y in your .config, it will be retained.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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