[PATCH] arm64: dts: rockchip: Enable device-tree overlay support for select devices

[Dragan Simic]

Hello Chris,

On 2024-03-28 19:05, Chris Morgan wrote:
> From: Chris Morgan <macromorgan at hotmail.com>
> 
> Add the '-@' DTC option for the Rock 5B and Indiedroid Nova devices.
> These two devices are relatively new both with external GPIO headers
> for expansion. This does impact the filesize of the DTB substantially.

I think that enabling this should be either left to Linux distributions,
to be enabled for all the dtbs they ship, which they already do, or be
enabled by us for all Rockchip DTs, instead of for enabling it just for
some boards.  However, I think that leaving it to Linux distributions is
the preferred way.

> rk3588-rock-5b.dtb		75352 -> 150094 bytes
> rk3588s-indiedroid-nova.dtb	69507 -> 136739 bytes
> 
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
>  arch/arm64/boot/dts/rockchip/Makefile | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile
> b/arch/arm64/boot/dts/rockchip/Makefile
> index f906a868b71a..26f306db0aea 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -1,4 +1,9 @@
>  # SPDX-License-Identifier: GPL-2.0
> +
> +# Enable support for external device-tree overlays
> +DTC_FLAGS_rk3588-rock-5b			:= -@
> +DTC_FLAGS_rk3588s-indiedroid-nova		:= -@
> +
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-evb.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-engicam-px30-core-ctouch2.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-engicam-px30-core-ctouch2-of10.dtb