[PATCH RFC 26/26] dts: support building all dtb files for a specific vendor

[Sumit Garg]

Hi Caleb,

On Mon, 4 Mar 2024 at 22:22, Caleb Connolly <caleb.connolly at linaro.org> wrote:
>
> This adjusts OF_UPSTREAM to behave more like the kernel by allowing for
> all the devicetree files for a given vendor to be compiled. This is
> useful for Qualcomm in particular as most boards are supported by a
> single U-Boot build just provided with a different DT.
>
> Signed-off-by: Caleb Connolly <caleb.connolly at linaro.org>
> ---
>  dts/Kconfig          | 24 ++++++++++++++++++++++++
>  scripts/Makefile.dts | 17 ++++++++++++++++-
>  2 files changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/dts/Kconfig b/dts/Kconfig
> index b9b6367154ef..67d9dc489856 100644
> --- a/dts/Kconfig
> +++ b/dts/Kconfig
> @@ -100,8 +100,32 @@ config OF_UPSTREAM
>           However, newer boards whose devicetree source files haven't landed in
>           the dts/upstream subtree, they can override this option to have the
>           DT build from existing U-Boot tree location instead.
>
> +config OF_UPSTREAM_BUILD_VENDOR
> +       bool "Build all devicetree files for a particular vendor"
> +       depends on OF_UPSTREAM
> +       help
> +         Enable building all devicetree files for a particular vendor. This

Do we really want to build all the DTBs even if many of those aren't
supported by U-Boot at all? I would have rather added Makefile targets
for boards which really supports a single defconfig eg.
qcom_defconfig.

-Sumit

> +         is useful for generic U-Boot configurations where many boards can
> +         be supported with a single binary.
> +
> +         This is only available for platforms using upstream devicetree.
> +
> +config OF_UPSTREAM_VENDOR
> +       string "Vendor to build all upstream devicetree files for"
> +       depends on OF_UPSTREAM_BUILD_VENDOR
> +       default "qcom" if ARCH_SNAPDRAGON
> +       default "rockchip" if ARCH_ROCKCHIP
> +       default "amlogic" if ARCH_MESON
> +       default "allwinner" if ARCH_SUNXI
> +       default "mediatek" if ARCH_MEDIATEK
> +       default "marvell" if ARCH_MVEBU
> +       default "xilinx" if ARCH_VERSAL || ARCH_ZYNQ
> +       default "nvidia" if ARCH_TEGRA
> +       help
> +         Select the vendor to build all devicetree files for.
> +
>  choice
>         prompt "Provider of DTB for DT control"
>         depends on OF_CONTROL
>
> diff --git a/scripts/Makefile.dts b/scripts/Makefile.dts
> index 5e2429c6170c..8005527f3df7 100644
> --- a/scripts/Makefile.dts
> +++ b/scripts/Makefile.dts
> @@ -1,3 +1,18 @@
>  # SPDX-License-Identifier: GPL-2.0+
>
> -dtb-y += $(patsubst %,%.dtb,$(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE) $(CONFIG_OF_LIST) $(CONFIG_SPL_OF_LIST)))
> +dtb-y += $(patsubst %,%.dtb,\
> +       $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE) $(CONFIG_OF_LIST) $(CONFIG_SPL_OF_LIST)))
> +
> +ifeq ($(CONFIG_OF_UPSTREAM_BUILD_VENDOR),y)
> +ifeq ($(CONFIG_ARM64),y)
> +dt_dir := $(srctree)/dts/upstream/src/arm64
> +else
> +dt_dir := $(srctree)/dts/upstream/src/$(ARCH)
> +endif
> +
> +dtb-vendor_dts := $(patsubst %.dts,%.dtb, \
> +       $(wildcard $(dt_dir)/$(subst ",,$(CONFIG_OF_UPSTREAM_VENDOR))/*.dts))
> +
> +dtb-y += $(subst $(dt_dir)/,,$(dtb-vendor_dts))
> +
> +endif
>
> --
> 2.44.0
>