[PATCH 1/1] riscv: dts: Enable device-tree overlay support for starfive devices

[Emil Renner Berthing]

On Mon, 10 Jul 2023 at 20:29, Conor Dooley <conor at kernel.org> wrote:
>
>
> Emil, Walker,
>
> On Tue, Jun 27, 2023 at 04:06:20PM +0800, Felix Moessbauer wrote:
> > Add the '-@' DTC option for the starfive devices. This option
> > populates the '__symbols__' node that contains all the necessary symbols
> > for supporting device-tree overlays (for instance from the firmware or
> > the bootloader) on these devices.
> >
> > The starfive devices allow various modules to be connected and this
> > enables users to create out-of-tree device-tree overlays for these modules.
> >
> > Please note that this change does increase the size of the resulting DTB
> > by ~20%. For example, with v6.4 increase in size is as follows:
>
> Whatcha think?

I'm fine with it. I just wonder why it's only the Nvidia Tegra boards
and the VisionFive's that need this. Surely other boards have pins for
expansion cards.

Acked-by: Emil Renner Berthing <emil.renner.berthing at canonical.com>
/Emil

> > jh7100-beaglev-starlight.dtb 6192 -> 7339
> > jh7100-starfive-visionfive-v1.dtb 6281 -> 7428
> > jh7110-starfive-visionfive-2-v1.2a.dtb 11101 -> 13447
> > jh7110-starfive-visionfive-2-v1.3b.dtb 11101 -> 13447
> >
> > Signed-off-by: Felix Moessbauer <felix.moessbauer at siemens.com>
> > ---
> >  arch/riscv/boot/dts/starfive/Makefile | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/arch/riscv/boot/dts/starfive/Makefile b/arch/riscv/boot/dts/starfive/Makefile
> > index 170956846d49..0141504c0f5c 100644
> > --- a/arch/riscv/boot/dts/starfive/Makefile
> > +++ b/arch/riscv/boot/dts/starfive/Makefile
> > @@ -1,4 +1,10 @@
> >  # SPDX-License-Identifier: GPL-2.0
> > +# Enables support for device-tree overlays
> > +DTC_FLAGS_jh7100-beaglev-starlight := -@
> > +DTC_FLAGS_jh7100-starfive-visionfive-v1 := -@
> > +DTC_FLAGS_jh7110-starfive-visionfive-2-v1.2a := -@
> > +DTC_FLAGS_jh7110-starfive-visionfive-2-v1.3b := -@
> > +
> >  dtb-$(CONFIG_ARCH_STARFIVE) += jh7100-beaglev-starlight.dtb
> >  dtb-$(CONFIG_ARCH_STARFIVE) += jh7100-starfive-visionfive-v1.dtb
> >
> > --
> > 2.39.2
> >
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