On Fri, Jan 22, 2021 at 04:20:32PM +0530, Viresh Kumar wrote: > We will start building overlays for platforms soon in the kernel and > would need fdtoverlay going forward. Lets start building it. > > The fdtoverlay program applies (or merges) one or more overlay dtb
Saying "merges" here is probably misleading, since as I mentioned
elsewhere fdtoverlay can *not* merge overlays, only apply them to a
base tree.
> blobs to a base dtb blob. The kernel build system would later use
> fdtoverlay to generate the overlaid blobs based on platform specific
> configurations.
>
> Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org>
> ---
> scripts/dtc/Makefile | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
> index 4852bf44e913..5f19386a49eb 100644
> --- a/scripts/dtc/Makefile
> +++ b/scripts/dtc/Makefile
> @@ -1,13 +1,17 @@
> # SPDX-License-Identifier: GPL-2.0
> # scripts/dtc makefile
>
> -hostprogs-always-$(CONFIG_DTC) += dtc
> +hostprogs-always-$(CONFIG_DTC) += dtc fdtoverlay
> hostprogs-always-$(CHECK_DT_BINDING) += dtc
>
> dtc-objs := dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
> srcpos.o checks.o util.o
> dtc-objs += dtc-lexer.lex.o dtc-parser.tab.o
>
> +libfdt-objs := fdt.o fdt_ro.o fdt_wip.o fdt_sw.o fdt_rw.o fdt_strerror.o
> fdt_empty_tree.o fdt_addresses.o fdt_overlay.o
> +libfdt = $(addprefix libfdt/,$(libfdt-objs))
> +fdtoverlay-objs := $(libfdt) fdtoverlay.o util.o
> +
> # Source files need to get at the userspace version of libfdt_env.h to
> compile
> HOST_EXTRACFLAGS += -I $(srctree)/$(src)/libfdt
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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