Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759112Ab2FFWtj (ORCPT ); Wed, 6 Jun 2012 18:49:39 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:59924 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754463Ab2FFWth (ORCPT ); Wed, 6 Jun 2012 18:49:37 -0400 From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org, devicetree-discuss@lists.ozlabs.org, Grant Likely , Rob Herring Cc: linux-kernel@vger.kernel.org, David Daney Subject: [PATCH v8 1/1] of/lib: Allow scripts/dtc/libfdt to be used from kernel code Date: Wed, 6 Jun 2012 15:49:32 -0700 Message-Id: <1339022972-20036-1-git-send-email-ddaney.cavm@gmail.com> X-Mailer: git-send-email 1.7.2.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5679 Lines: 192 From: David Daney 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 --- This patch has been seen several times before as part of a larger patch set for my OCTEON Device Tree work. After further refinement to my patches that depend on core Device Tree functionality, this is the only remaining patch to the common 'core' code. Here is the history: v8: Rebased lib/Makefile to avoid merge conflict. v7: No changes other that to split from other, now unneeded, patches. v6: No changes other than to split these out of the MIPS/OCTEON patch set to allow them to be merged separately if desired. v5: Build libfdt in the lib directory instead of devices/of, and include all libfdt files. Changes to of_find_node_by_path() requested by Grant Likely. v4: No changes to these two patches. v3: libfdt building moved to devices/of/libfdt. Cleanup and style improvements as suggested by Grant Likely. v2: No changes to these two patches. There are a couple of possibility for merging this. 1) Via the Device Tree maintainers, thus blocking the follow-ons until it is merged. 2) Via Ralf's Linux/MIPS tree with the rest of the patches after Device Tree maintainer sign-off. 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(+), 0 deletions(-) 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 0000000..4c0306c --- /dev/null +++ b/include/linux/libfdt.h @@ -0,0 +1,8 @@ +#ifndef _INCLUDE_LIBFDT_H_ +#define _INCLUDE_LIBFDT_H_ + +#include +#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 0000000..01508c7 --- /dev/null +++ b/include/linux/libfdt_env.h @@ -0,0 +1,13 @@ +#ifndef _LIBFDT_ENV_H +#define _LIBFDT_ENV_H + +#include + +#include + +#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 a9e1540..e091300 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 8c31a0c..2f2be5a 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 0000000..97f2006 --- /dev/null +++ b/lib/fdt.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt.c" diff --git a/lib/fdt_ro.c b/lib/fdt_ro.c new file mode 100644 index 0000000..f73c04e --- /dev/null +++ b/lib/fdt_ro.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt_ro.c" diff --git a/lib/fdt_rw.c b/lib/fdt_rw.c new file mode 100644 index 0000000..0c1f0f4 --- /dev/null +++ b/lib/fdt_rw.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt_rw.c" diff --git a/lib/fdt_strerror.c b/lib/fdt_strerror.c new file mode 100644 index 0000000..8713e3f --- /dev/null +++ b/lib/fdt_strerror.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt_strerror.c" diff --git a/lib/fdt_sw.c b/lib/fdt_sw.c new file mode 100644 index 0000000..9ac7e50 --- /dev/null +++ b/lib/fdt_sw.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt_sw.c" diff --git a/lib/fdt_wip.c b/lib/fdt_wip.c new file mode 100644 index 0000000..45b3fc3 --- /dev/null +++ b/lib/fdt_wip.c @@ -0,0 +1,2 @@ +#include +#include "../scripts/dtc/libfdt/fdt_wip.c" -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/