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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Wed, 9 Nov 2022 08:46:54 +0100
Message-ID: <CAMuHMdU2cQ_9a6HcXzMQPNUoJ78i4y04oAkZ0HnRLzyYq2MsuA@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>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Prabhakar,

On Tue, Nov 8, 2022 at 11:05 PM Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
> On Tue, Nov 8, 2022 at 7:20 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > 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.
> >
> Confused, didnt you say about dropping it from defconfig...

Yes, I did, but not right now, only after v6.2-rc1.

  - Once the defconfig has CONFIG_ARCH_R9A07G043=y, ARCH_RZG2L will
    be auto-selected (commit ebd0e06f3063cc2e ("soc: renesas: Identify
    RZ/Five SoC") is already upstream), and CONFIG_PM as well. So there
    is no longer a need for the defconfig to enable it explicitly.
  - Once the defconfig has CONFIG_ARCH_RENESAS=y, SOC_RENESAS will
    be auto-selected, but auto-selecting CONFIG_GPIOLIB depends on commit
    b3acbca3c80e6124 ("soc: renesas: Kconfig: Explicitly select GPIOLIB and
    PINCTRL config under SOC_RENESAS") is only in renesas-drivers-for-v6.2.

Please run "make savedefconfig", and compare the generated defconfig
with arch/riscv/configs/defconfig.

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