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2017-05-20Merge tag 'devicetree-fixes-for-4.12' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree fixes from Rob Herring: - fix missing allocation failure handling in fdt code - fix dtc compile error on 32-bit hosts - revert bad sparse changes causing GCC7 warnings * tag 'devicetree-fixes-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: of: fdt: add missing allocation-failure check dtc: check.c fix compile error Partially Revert "of: fix sparse warnings in fdt, irq, reserved mem, and resolver code"
2017-05-19devicetree: Move include prefixes from arch to separate directoryOlof Johansson15-0/+15
We use a directory under arch/$ARCH/boot/dts as an include path that has links outside of the subtree to find dt-bindings from under include/dt-bindings. That's been working well, but new DT architectures haven't been adding them by default. Recently there's been a desire to share some of the DT material between arm and arm64, which originally caused developers to create symlinks or relative includes between the subtrees. This isn't ideal -- it breaks if the DT files aren't stored in the exact same hierarchy as the kernel tree, and generally it's just icky. As a somewhat cleaner solution we decided to add a $ARCH/ prefix link once, and allow DTS files to reference dtsi (and dts) files in other architectures that way. Original approach was to create these links under each architecture, but it lead to the problem of recursive symlinks. As a remedy, move the include link directories out of the architecture trees into a common location. At the same time, they can now share one directory and one dt-bindings/ link as well. Fixes: 4027494ae6e3 ('ARM: dts: add arm/arm64 include symlinks') Reported-by: Russell King <linux@armlinux.org.uk> Reported-by: Omar Sandoval <osandov@osandov.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Rob Herring <robh@kernel.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Frank Rowand <frowand.list@gmail.com> Cc: linux-arch <linux-arch@vger.kernel.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2017-05-17dtc: check.c fix compile errorShuah Khan1-1/+1
Fix the following compile error found on odroid-xu4: checks.c: In function ‘check_simple_bus_reg’: checks.c:876:41: error: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘uint64_t{aka long long unsigned int}’ [-Werror=format=] snprintf(unit_addr, sizeof(unit_addr), "%lx", reg); ^ checks.c:876:41: error: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘uint64_t {aka long long unsigned int}’ [-Werror=format=] cc1: all warnings being treated as errors Makefile:304: recipe for target 'checks.o' failed make: *** [checks.o] Error 1 Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> [dwg: Correct new format to be correct in general] Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [robh: cherry-picked from upstream dtc commit 2a42b14d0d03] Signed-off-by: Rob Herring <robh@kernel.org>
2017-03-30dtc: update warning settings for new bus and node/property name checksRob Herring1-0/+1
dtc gained new warnings checking PCI and simple buses, unit address formatting, and stricter node and property name checking. Disable the new dtc warnings by default as there are 1000s. As before, warnings are enabled with W=1 or W=2. The strict node and property name checks are a bit subjective, so they are only enabled for W=2. Signed-off-by: Rob Herring <robh@kernel.org>
2017-03-22scripts/dtc: Update to upstream version v1.4.4-8-g756ffc4f52f6Rob Herring19-182/+523
This adds the following commits from upstream: 756ffc4f52f6 Build pylibfdt as part of the normal build process 8cb3896358e9 Adjust libfdt.h to work with swig b40aa8359aff Mention pylibfdt in the documentation 12cfb740cc76 Add tests for pylibfdt 50f250701631 Add an initial Python library for libfdt cdbb2b6c7a3a checks: Warn on node name unit-addresses with '0x' or leading 0s 4c15d5da17cc checks: Add bus checks for simple-bus buses 33c3985226d3 checks: Add bus checks for PCI buses 558cd81bdd43 dtc: Bump version to v1.4.4 c17a811c62eb fdtput: Remove star from value_len documentation 194d5caaefcb fdtget: Use @return to document the return value d922ecdd017b tests: Make realloc_fdt() really allocate *fdt 921cc17fec29 libfdt: overlay: Check the value of the right variable 9ffdf60bf463 dtc: Simplify asm_emit_string() implementation 881012e44386 libfdt: Change names of sparse helper macros bad5b28049e5 Fix assorted sparse warnings 672ac09ea04d Clean up gcc attributes 49300f2ade6a dtc: Don't abuse struct fdt_reserve_entry fa8bc7f928ac dtc: Bump version to v1.4.3 34a9886a177f Add printf format attributes f72508e2b6ca Correct some broken printf() like format mismatches 397d5ef0203c libfdt: Add fdt_setprop_empty() 69a1bd6ad3f9 libfdt: Remove undefined behaviour setting empty properties acd1b534a592 Print output filename as part of warning messages 120775eb1cf3 dtc: Use streq() in preference to strcmp() 852e9ecbe197 checks: Add Warning for stricter node name character checking ef0e8f061534 checks: Add Warning for stricter property name character checking 00d7bb1f4b0e dtc: pos parameter to srcpos_string() can't be NULL 95d57726bca4 livetree.c: Fix memory leak 3b9c97093d6e dtc: Fix NULL pointer use in dtlabel + dtref case 43eb551426ea manual: Fix typo it -> in 4baf15f7f13f Makefile: Add tags rule Signed-off-by: Rob Herring <robh@kernel.org>
2017-03-22scripts/dtc: automate getting dtc version and log in update scriptRob Herring1-1/+18
Further automate the dtc update script to fill in the dtc version and commit log. Signed-off-by: Rob Herring <robh@kernel.org>
2017-01-04scripts/dtc: Update to upstream version 0931cea3ba20Rob Herring24-1019/+1661
Sync to upstream dtc commit 0931cea3ba20 ("dtc: fdtdump: check fdt if not in scanning mode"). In particular, this pulls in dtc overlay support. This adds the following commits from upstream: f88865469b65 dtc: Fix memory leak in character literal parsing 00fbb8696b66 Rename boot_info 1ef86ad2c24f dtc: Clean up /dts-v1/ and /plugin/ handling in grammar e3c769aa9c16 dtc: Don't always generate __symbols__ for plugins c96cb3c0169e tests: Don't use -@ on plugin de/recompile tests 66381538ce24 tests: Remove "suppression of fixups" tests ba765b273f0f tests: Clarify dtc overlay tests 6ea8cd944fcd tests: More thorough tests of libfdt overlay application without dtc 7d8ef6e1db97 tests: Correct fdt handling of overlays without fixups and base trees without symbols b4dc0ed8b127 tests: Fix double expansion bugs in test code 3ea879dc0c8f tests: Split overlay tests into those with do/don't exercise dtc plugin generation 47b4d66a2f11 tests: Test auto-alias generation on base tree, not overlay 72e1ad811523 tests: Make overlay/plugin tests unconditional e7b3c3b5951b tests: Add overlay tests 9637e3f772a9 tests: Add check_path test 20f29d8d41f6 dtc: Plugin and fixup support a2c92cac53f8 dtc: Document the dynamic plugin internals 8f70ac39801d checks: Pass boot_info instead of root node ea10f953878f libfdt: add missing errors to fdt_strerror() daa75e8fa594 libfdt: fix fdt_stringlist_search() e28eff5b787a libfdt: fix fdt_stringlist_count() ae97c7722840 tests: overlay: Rename the device tree blobs to be more explicit 96162d2bd9cb tests: overlay: Add test suffix to the compiled blobs 5ce8634733b7 libfdt: Add fdt_overlay_apply to the exported symbols 804a9db90ad2 fdt: strerr: Remove spurious BADOVERLAY e8c3a1a493fa tests: overlay: Move back the bad fixup tests 7a72d89d3f81 libfdt: overlay: Fix symbols and fixups nodes condition cabbaa972cdd libfdt: overlay: Report a bad overlay for mismatching local fixups deb0a5c1aeaa libfdt: Add BADPHANDLE error string 7b7a6be9ba15 libfdt: Don't use 'index' as a local variable name aea8860d831e tests: Add tests cases for the overlay code 0cdd06c5135b libfdt: Add overlay application function 39240cc865cf libfdt: Extend the reach of FDT_ERR_BADPHANDLE 4aa3a6f5e6d9 libfdt: Add new errors for the overlay code 6d1832c9e64b dtc: Remove "home page" link 45fd440a9561 Fix some typing errors in libfdt.h and livetree.c a59be4939c13 Merge tag 'v1.4.2' a34bb721caca dtc: Fix assorted problems in the testcases for the -a option 874f40588d3e Implement the -a option to pad dtb aligned ec02b34c05be dtc: Makefile improvements for release uploading 1ed45d40a137 dtc: Bump version to 1.4.2 36fd7331fb11 libfdt: simplify fdt_del_mem_rsv() d877364e4a0f libfdt: Add fdt_setprop_inplace_namelen_partial 3e9037aaad44 libfdt: Add fdt_getprop_namelen_w 84e0e1346c68 libfdt: Add max phandle retrieval function d29126c90acb libfdt: Add iterator over properties 902d0f0953d0 libfdt: Add a subnodes iterator macro c539075ba8ba fdtput.c: Fix memory leak. f79ddb83e185 fdtget.c: Fix memory leak 1074ee54b63f convert-dtsv0-lexer.l: fix memory leak e24d39a024e6 fdtdump.c: make sure size_t argument to memchr is always unsigned. 44a59713cf05 Remove unused srcpos_dump() function cb9241ae3453 DTC: Fix memory leak on flatname. 1ee0ae24ea09 Simplify check field and macro names 9d97527a8621 Remove property check functions 2e709d158e11 Remove tree check functions c4cb12e193e3 Alter grammar to allow multiple /dts-v1/ tags d71d25d76012 Use xasprintf() in srcpos 9dc404958e9c util: Add xasprintf portable asprintf variant beef80b8b55f Correct a missing space in a fdt_header cast 68d43cec1253 Correct line lengths in libfdt.h b0dbceafd49a Correct space-after-tab in libfdt.h Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-22scripts/dtc: dt_to_config - kernel config options for a devicetreeGaurav Minocha2-1/+1214
Determining which kernel config options need to be enabled for a given devicetree can be a painful process. Create a new tool to find the drivers that may match a devicetree node compatible, find the kernel config options that enable the driver, and optionally report whether the kernel config option is enabled. Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com> Signed-off-by: Frank Rowand <frank.rowand@am.sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
2016-03-29scripts/dtc: Update to upstream version 53bf130b1cddRob Herring4-7/+31
Sync to upstream dtc commit 53bf130b1cdd ("libfdt: simplify fdt_node_check_compatible()"). This adds the following commits from upstream: 53bf130 libfdt: simplify fdt_node_check_compatible() c9d9121 Warn on node name unit-address presence/absence mismatch 2e53f9d Catch unsigned 32bit overflow when parsing flattened device tree offsets Signed-off-by: Rob Herring <robh@kernel.org>
2016-02-12scripts/dtc: Update to upstream commit b06e55c88b9bRob Herring12-111/+390
Sync to upstream dtc commit b06e55c88b9b ("Prevent crash on modulo by zero"). This adds the following commits from upstream: b06e55c Prevent crash on modulo by zero b433450 Fix some bugs in processing of line directives d728ad5 Fix crash on nul character in string escape sequence 1ab2205 Gracefully handle bad octal literals 1937095 Prevent crash on division by zero d0b3ab0 libfdt: Fix undefined behaviour in fdt_offset_ptr() d4c7c25 libfdt: check for potential overrun in _fdt_splice() f58799b libfdt: Add some missing symbols to version.lds af9f26d Remove duplicated -Werror in dtc Makefile 604e61e fdt: Add functions to retrieve strings 8702bd1 fdt: Add a function to get the index of a string 2218387 fdt: Add a function to count strings 554fde2 libfdt: fix comment block of fdt_get_property_namelen() e5e6df7 fdtdump: Fix bug printing bytestrings with negative values 067829e Remove redundant fdtdump test code 897a429 Move fdt_path_offset alias tests to right tests section 2d1417c Add simple .travis.yml f6dbc6c guess output file format 5e78dff guess input file format based on file content or file name 8b927bf tests: convert `echo -n` to `printf` 64c46b0 Fix crash with poorly defined #size-cells Cc: Grant Likely <grant.likely@linaro.org> Tested-by: Frank Rowand <frank.rowand@sonymobile.com> Reviewed-by: Frank Rowand <frank.rowand@sonymobile.com> Signed-off-by: Rob Herring <robh@kernel.org>
2016-02-12scripts/dtc: dtx_diff - add info to error messageFrank Rowand1-4/+10
If kernel config options are not properly set, "make scripts" will not compile dtc. Update the unable to find dtc error message to check the kernel config and give better advice on how to create dtc. Reword another error message to increase clarity. Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com> Signed-off-by: Rob Herring <robh@kernel.org>
2016-01-25dtc: create tool to diff device treesFrank Rowand1-0/+343
Create script to diff device trees. The device tree can be in any of the forms recognized by the dtc compiler: - source - binary blob - file system tree (from /proc/devicetree) If the device tree is a source file, then it is pre-processed in the same way as it would be when built in the linux kernel source tree before diffing. Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-30scripts/dtc: Update to upstream version 9d3649bd3be245c9Rob Herring29-1535/+1745
Sync dtc with upstream as of commit 9d3649bd3be2 (Add testcases for fdt_path_offset_namelen()). Signed-off-by: Rob Herring <robh@kernel.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: devicetree@vger.kernel.org
2015-04-30scripts/dtc: add missing libfdt and fixups to import scriptGaurav Minocha1-0/+9
The following script is used to import dtc upstream into kernel. It was missing import of dtc/libfdt, with this commit it will include the same. Also, currently in arch and driver code that needs early access to the flattened device tree it is necessary to add specific CFLAGS so that when scripts/dtc/libfdt/libfdt.h is included the C preprocessor is able to locate the libfdt versions of libfdt_env.h and fdt.h without generating an error. So, this script replaces angular brackets with quotation used to include header files fdt.h and libfdt_env.h Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com> [robh: reword commit headline and add 'git add'] Signed-off-by: Rob Herring <robh@kernel.org>
2014-06-10kbuild: trivial - remove trailing empty linesMasahiro Yamada4-4/+0
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-01-21scripts/dtc: Add a script to update to mainline dtc sourceGrant Likely2-1/+55
A very simple script that automates pulling in a newer version of DTC. Not particularly robust, but a whole lot better than doing it by hand every time. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-01-21scripts/dtc: Update to upstream version v1.4.0Grant Likely6-82/+294
Update to the latest version of dtc with the following notable enhancements and bug fixes: * fdtput: expand fdt if value does not fit * dtc/fdt{get, put}/convert-dtsv0-lexer: convert to new usage helpers * libfdt: Add fdt_next_subnode() to permit easy subnode iteration * utilfdt_read: pass back up the length of data read * util_version: new helper for displaying version info * die: constify format string arg * utilfdt_read_err: use xmalloc funcs * Export fdt_stringlist_contains() * dtc: Drop the '-S is deprecated' warning * dtc/libfdt: sparse fixes * dtc/libfdt: introduce fdt types for annotation by endian checkers * Fix util_is_printable_string * dtc: srcpos_verror() should print to stderr * libfdt: Added missing functions to shared library Shipped bison/flex generated files were built on an Ubuntu 13.10 system. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-01-21scripts/dtc: Update shipped files to build with bison 2.7.12Grant Likely2-283/+222
Preparation patch before updating to upstream dtc version 1.4.0. This change only contains the changes caused by a new version of bison on the shipped files. There are no functional changes. The shipped files were build on an Ubuntu 13.10 system Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-06-14dtc: ensure #line directives don't consume data from the next lineGrant Likely2-117/+117
Previously, the #line parsing regex ended with ({WS}+[0-9]+)?. The {WS} could match line-break characters. If the #line directive did not contain the optional flags field at the end, this could cause any integer data on the next line to be consumed as part of the #line directive parsing. This could cause syntax errors (i.e. #line parsing consuming the leading 0 from a hex literal 0x1234, leaving x1234 to be parsed as cell data, which is a syntax error), or invalid compilation results (i.e. simply consuming literal 1234 as part of the #line processing, thus removing it from the cell data). Fix this by replacing {WS} with [ \t] so that it can't match line-breaks. Convert all instances of {WS}, even though the other instances should be irrelevant for any well-formed #line directive. This is done for consistency and ultimate safety. [Cherry picked from DTC commit a1ee6f068e1c8dbc62873645037a353d7852d5cc] Reported-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-06-14dtc: Update generated files to output from Bison 2.5Grant Likely2-341/+388
This patch merely updates the generated dtc parser and lexer files to the output generated by Bison 2.5. The previous versions were generated from version 2.4.1. The only reason for this commit is to minimize the diff on the next commit which fixes a bug in the DTC #line directive parsing. Otherwise the Bison changes would be intermingled with the functional changes. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-21script: dtc: clean generated filesMagnus Damm1-0/+2
Fix "make distclean" to clean up generated dtc files. Without this patch the following files are left around: - dtc-lexer.lex.c - dtc-parser.tab.c - dtc-parser.tab.h Signed-off-by: Magnus Damm <damm@opensource.se> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-10-18dtc: fix for_each_*() to skip first object if deletedStephen Warren1-34/+10
The previous definition of for_each_*() would always include the very first object within the list, irrespective of whether it was marked deleted, since the deleted flag was not checked on the first object, but only on any "next" object. Fix for_each_*() to check the deleted flag in the loop body every iteration to correct this. (upstream dtc commit 1762ab42ef77db7ab2776d0d6cba3515150f518a) Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-10-01dtc: import latest upstream dtcStephen Warren30-701/+3847
This updates scripts/dtc to commit 317a5d9 "dtc: zero out new label objects" from git://git.jdl.com/software/dtc.git. This adds features such as: * /bits/ syntax for cell data. * Math expressions within cell data. * The ability to delete properties or nodes. * Support for #line directives in the input file, which allows the use of cpp on *.dts. * -i command-line option (/include/ path) * -W/-E command-line options for error/warning control. * Removal of spew to STDOUT containing the filename being compiled. * Many additions to the libfdt API. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Jon Loeliger <jdl@jdl.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-03-25scripts: dtc: fix compile warningsFelipe Balbi2-6/+1
Fix following compile warnings: scripts/dtc/flattree.c: In function ‘flat_read_mem_reserve’: scripts/dtc/flattree.c:700:14: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] scripts/dtc/dtc.c: In function ‘main’: scripts/dtc/dtc.c:104:17: warning: variable ‘check’ set but not used [-Wunused-but-set-variable] Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2012-01-15dtc: Implement -d option to write out a dependency fileStephen Warren3-1/+25
This will allow callers to rebuild .dtb files when any of the /include/d .dtsi files are modified, not just the top-level .dts file. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2011-06-09dtc: regen parserArnaud Lacombe3-161/+25
Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
2011-06-09dtc: migrate parser to implicit rulesArnaud Lacombe1-27/+1
Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
2011-03-31Fix common misspellingsLucas De Marchi2-2/+2
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-01-04of/flattree: Update dtc to current mainline.John Bonesio18-1452/+1721
Pull in recent changes from the main dtc repository. These changes primarily allow multiple device trees to be declared which are merged by dtc. This feature allows us to include a basic dts file and then provide more information for the specific system through the merging functionality. Changes pulled from git://git.jdl.com/software/dtc.git commit id: 37c0b6a0, "dtc: Add code to make diffing trees easier" Signed-off-by: John Bonesio <bones@secretlab.ca> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-02scripts/dtc: Fix a resource leakMartin Ettl1-0/+1
during a check of the current git head of the linux kernel with the static code analysis tool cppcheck (http://sourceforge.net/apps/mediawiki/cppcheck/index.php?title=Main_Page) the tool discovered a resource leak in linux-2.6/scripts/dtc/fstree.c. Please refer the attached patch, that fixes the issue. Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15363 Signed-off-by: Martin Ettl <ettl.martin@gmx.de> Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-11-16dtc: Mark various internal functions staticJosh Triplett3-3/+3
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
2009-11-16dtc: Set "noinput" in the lexer to avoid an unused functionJosh Triplett2-17/+54
Regenerate the corresponding generated lexer. Regenerating the lexer with current flex also provides prototypes for various yy* functions, making some -Wmissing-prototypes warnings go away as well. Signed-off-by: Josh Triplett <josh@joshtriplett.org>
2009-06-26powerpc: Have git ignore generated files from dtc compileJon Smirl1-0/+5
Have git ignore generated files from dtc compile Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Sean MacLennan <smaclennan@pikatech.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-05-03Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtcDavid Gibson29-0/+11161
The powerpc kernel always requires an Open Firmware like device tree to supply device information. On systems without OF, this comes from a flattened device tree blob. This blob is usually generated by dtc, a tool which compiles a text description of the device tree into the flattened format used by the kernel. Sometimes, the bootwrapper makes small changes to the pre-compiled device tree blob (e.g. filling in the size of RAM). To do this it uses the libfdt library. Because these are only used on powerpc, the code for both these tools is included under arch/powerpc/boot (these were imported and are periodically updated from the upstream dtc tree). However, the microblaze architecture, currently being prepared for merging to mainline also uses dtc to produce device tree blobs. A few other archs have also mentioned some interest in using dtc. Therefore, this patch moves dtc and libfdt from arch/powerpc into scripts, where it can be used by any architecture. The vast bulk of this patch is a literal move, the rest is adjusting the various Makefiles to use dtc and libfdt correctly from their new locations. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>