From ab25383983fb8d7786696f5371e75e79c3e9a405 Mon Sep 17 00:00:00 2001 From: David Daney <david.daney@cavium.com> Date: Thu, 5 Jul 2012 18:12:38 +0200 Subject: [PATCH] of/lib: Allow scripts/dtc/libfdt to be used from kernel code libfdt is part of the device tree support in scripts/dtc/libfdt. For some platforms that use the Device Tree, we want to be able to edit the flattened device tree form. We don't want to burden kernel builds that do not require it, so we gate compilation of libfdt files with CONFIG_LIBFDT. So if it is needed, you need to do this in your Kconfig: select LIBFDT And in the Makefile of the code using libfdt something like: ccflags-y := -I$(src)/../../../scripts/dtc/libfdt Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: devicetree-discuss@lists.ozlabs.org Cc: Grant Likely <grant.likely@secretlab.ca> Cc: linux-kernel@vger.kernel.org Acked-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- include/linux/libfdt.h | 8 ++++++++ include/linux/libfdt_env.h | 13 +++++++++++++ lib/Kconfig | 6 ++++++ lib/Makefile | 5 +++++ lib/fdt.c | 2 ++ lib/fdt_ro.c | 2 ++ lib/fdt_rw.c | 2 ++ lib/fdt_strerror.c | 2 ++ lib/fdt_sw.c | 2 ++ lib/fdt_wip.c | 2 ++ 10 files changed, 44 insertions(+) create mode 100644 include/linux/libfdt.h create mode 100644 include/linux/libfdt_env.h create mode 100644 lib/fdt.c create mode 100644 lib/fdt_ro.c create mode 100644 lib/fdt_rw.c create mode 100644 lib/fdt_strerror.c create mode 100644 lib/fdt_sw.c create mode 100644 lib/fdt_wip.c diff --git a/include/linux/libfdt.h b/include/linux/libfdt.h new file mode 100644 index 0000000000000..4c0306c69b4e0 --- /dev/null +++ b/include/linux/libfdt.h @@ -0,0 +1,8 @@ +#ifndef _INCLUDE_LIBFDT_H_ +#define _INCLUDE_LIBFDT_H_ + +#include <linux/libfdt_env.h> +#include "../../scripts/dtc/libfdt/fdt.h" +#include "../../scripts/dtc/libfdt/libfdt.h" + +#endif /* _INCLUDE_LIBFDT_H_ */ diff --git a/include/linux/libfdt_env.h b/include/linux/libfdt_env.h new file mode 100644 index 0000000000000..01508c7b8c812 --- /dev/null +++ b/include/linux/libfdt_env.h @@ -0,0 +1,13 @@ +#ifndef _LIBFDT_ENV_H +#define _LIBFDT_ENV_H + +#include <linux/string.h> + +#include <asm/byteorder.h> + +#define fdt32_to_cpu(x) be32_to_cpu(x) +#define cpu_to_fdt32(x) cpu_to_be32(x) +#define fdt64_to_cpu(x) be64_to_cpu(x) +#define cpu_to_fdt64(x) cpu_to_be64(x) + +#endif /* _LIBFDT_ENV_H */ diff --git a/lib/Kconfig b/lib/Kconfig index a9e15403434ef..e091300b2045b 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -395,4 +395,10 @@ config SIGNATURE Digital signature verification. Currently only RSA is supported. Implementation is done using GnuPG MPI library +# +# libfdt files, only selected if needed. +# +config LIBFDT + bool + endmenu diff --git a/lib/Makefile b/lib/Makefile index 8c31a0cb75e97..2f2be5a8734c4 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -130,6 +130,11 @@ obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o obj-$(CONFIG_STMP_DEVICE) += stmp_device.o +libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o +$(foreach file, $(libfdt_files), \ + $(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt)) +lib-$(CONFIG_LIBFDT) += $(libfdt_files) + hostprogs-y := gen_crc32table clean-files := crc32table.h diff --git a/lib/fdt.c b/lib/fdt.c new file mode 100644 index 0000000000000..97f20069fc373 --- /dev/null +++ b/lib/fdt.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt.c" diff --git a/lib/fdt_ro.c b/lib/fdt_ro.c new file mode 100644 index 0000000000000..f73c04ea7be47 --- /dev/null +++ b/lib/fdt_ro.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt_ro.c" diff --git a/lib/fdt_rw.c b/lib/fdt_rw.c new file mode 100644 index 0000000000000..0c1f0f4a4b13c --- /dev/null +++ b/lib/fdt_rw.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt_rw.c" diff --git a/lib/fdt_strerror.c b/lib/fdt_strerror.c new file mode 100644 index 0000000000000..8713e3ff4707b --- /dev/null +++ b/lib/fdt_strerror.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt_strerror.c" diff --git a/lib/fdt_sw.c b/lib/fdt_sw.c new file mode 100644 index 0000000000000..9ac7e50c76cec --- /dev/null +++ b/lib/fdt_sw.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt_sw.c" diff --git a/lib/fdt_wip.c b/lib/fdt_wip.c new file mode 100644 index 0000000000000..45b3fc3d3ba16 --- /dev/null +++ b/lib/fdt_wip.c @@ -0,0 +1,2 @@ +#include <linux/libfdt_env.h> +#include "../scripts/dtc/libfdt/fdt_wip.c" -- GitLab