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| * Merge branch 'master' of git://git.denx.de/u-boot-mpc85xxTom Rini2014-04-25-0/+89
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| | * powerpc/T4QDS: add two stage boot of nand/sdShaohui Xie2014-04-22-0/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support of 2 stage NAND/SD boot loader using SPL framework. PBL initialise the internal SRAM and copy SPL, this further initialise DDR using SPD and environment and copy u-boot from NAND/SD to DDR, finally SPL transfer control to u-boot. NOR uses CS1 instead of CS2 when NAND boot, fix it. Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
| | * board/b4qds:Add support of 2 stage NAND boot-loaderPrabhakar Kushwaha2014-04-22-0/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support of 2 stage NAND boot loader using SPL framework. here, PBL initialise the internal SRAM and copy SPL(160KB). This further initialise DDR using SPD and environment and copy u-boot(768 KB) from NAND to DDR. Finally SPL transer control to u-boot. Initialise/create followings required for SPL framework - Add spl.c which defines board_init_f, board_init_r - update tlb and ddr accordingly Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
| * | MIPS: drop incaip boardDaniel Schwierzeck2014-04-20-0/+1
| |/ | | | | | | | | | | | | | | | | This is dead hardware and no one is interested in making the necessary changes for upcoming features like generic board or driver model. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Cc: Wolfgang Denk <wd@denx.de>
| * kbuild: docbook: sync with Linux Kernel v3.15-rc1Masahiro Yamada2014-04-18-19/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit imports DocBook-related updates from v3.14 to v3.15-rc1. - commit ec3fadd64b9940baa2a369bf978e8561837db3f5 kbuild: docbook: use $(obj) and $(src) rather than specific path - commit 100da4c0150c97ce34d4d3b38bf2f5449b05ae4f kbuild: docbook: specify KERNELDOC dependency correctly - commit 6f89b9c1d6b29eaa600ac4a8ac1314b0d06f15e3 kbuild: docbook: include cmd files more simply - commit ac6d662a95a6989d83b259ccf8ec01dd7903af73 doc: Add "*.svg" to DocBook/.gitignore - commit 832919bfcf0cfd75767c68b0c61f7cf48be860a8 DocBook: Make mandocs parallel-safe - commit c4d79a4799719f2b0cd354ee498aad605730c97e work around xmlto bug in htmldocs Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * doc:power:pmic: Add doc entry for PMIC(v2) frameworkƁukasz Majewski2014-04-18-0/+166
| | | | | | | | | | | | | | | | | | | | | | Well written documentation for PMIC framework was missing and hence it has been probably difficult and time consuming for other developers to understand rationale for key design decisions and overall design structure. This commit provides proper documentation entry. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
| * arm: remove lubbock board supportMasahiro Yamada2014-04-18-0/+1
| | | | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/lubbock/* - Remove include/configs/lubbock.h - Cleanup defined(CONFIG_LUBBOCK) - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove MOUSSE board supportMasahiro Yamada2014-04-18-0/+1
| | | | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/mousse/* - Remove include/configs/MOUSSE.h - Clean-up defined(CONFIG_MOUSSE) - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove rsdproto board supportMasahiro Yamada2014-04-18-0/+1
| | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/rsdproto/* - Remove include/configs/rsdproto.h - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove RPXsuper board supportMasahiro Yamada2014-04-18-0/+1
| | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/rpxsuper/* - Remove include/configs/RPXsuper.h - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove RPXClassic, RPXlite boards supportMasahiro Yamada2014-04-18-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Enough time has passed since these boards were moved to Orphan. Remove. - Remove board/RPXlite/* - Remove board/RPXClassic/* - Remove include/configs/RPXlite.h - Remove include/configs/RPXClassic.h - Clean-up defined(CONFIG_RPXCLASSIC) - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove genietv board supportMasahiro Yamada2014-04-18-3/+1
| | | | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/genietv/* - Remove include/configs/GENIETV.h - Clean-up if defined(CONFIG_GENIETV) - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove MBX and MBX860T boards supportMasahiro Yamada2014-04-18-0/+1
| | | | | | | | | | | | | | | | | | | | | | Enough time has passed since these boards were moved to Orphan. Remove. - Remove board/mbx8xx/* - Remove include/configs/{MBX.h,MBX860T.h} - Clean-up if defined(CONFIG_MBX) - Move the entries from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: remove NX823 board supportMasahiro Yamada2014-04-18-2/+3
| | | | | | | | | | | | | | | | | | | | | | Enough time has passed since this board was moved to Orphan. Remove. - Remove board/nx823/* - Remove include/configs/NX823.h - Clean-up ifdef(CONFIG_NX823) - Move the entry from boards.cfg to doc/README.scrapyard Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * powerpc: mpc8xx: delete an unused source fileMasahiro Yamada2014-04-17-1/+1
| | | | | | | | | | | | | | | | | | References to the wireless keyboard should also be removed from README.console. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Wolfgang Denk <wd@denx.de> Acked-by: Wolfgang Denk <wd@denx.de>
| * board: esd: remove remainders of dead boardsMasahiro Yamada2014-04-17-0/+2
| | | | | | | | | | | | | | | | | | | | | | Commit 99bcad18 deleted ADCIOP and DASA_SIM board support but missed to delete board/esd/adciop and board/esd/dasa_sim. It also missed to add entries to doc/README.scrapyard. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Stefan Roese <sr@denx.de> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Matthias Fuchs <matthias.fuchs@esd.eu>
| * cosmetic: README.scrapyard: fix false removed date and commitMasahiro Yamada2014-04-17-4/+4
| | | | | | | | | | | | | | | | | | Describe removed date in the form of YYYY-MM-DD, not YYYY-DD-MM. And wrong commit hash also should be fixed. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Marek Vasut <marex@denx.de> Acked-by: Marek Vasut <marex@denx.de>
| * cosmetic: README.scrapyard: sort in reverse chronological orderMasahiro Yamada2014-04-17-7/+7
| | | | | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * Merge branch 'next'Tom Rini2014-04-17-1/+19
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| | * tools, fit_check_sign: verify a signed fit imageHeiko Schocher2014-03-21-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | add host tool "fit_check_sign" which verifies, if a fit image is signed correct. Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org>
| | * rsa: add sha256-rsa2048 algorithmHeiko Schocher2014-03-21-1/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | based on patch from andreas@oetken.name: http://patchwork.ozlabs.org/patch/294318/ commit message: I currently need support for rsa-sha256 signatures in u-boot and found out that the code for signatures is not very generic. Thus adding of different hash-algorithms for rsa-signatures is not easy to do without copy-pasting the rsa-code. I attached a patch for how I think it could be better and included support for rsa-sha256. This is a fast first shot. aditionally work: - removed checkpatch warnings - removed compiler warnings - rebased against current head Signed-off-by: Heiko Schocher <hs@denx.de> Cc: andreas@oetken.name Cc: Simon Glass <sjg@chromium.org>
| * | Start the deprecation process for generic boardSimon Glass2014-04-17-0/+189
| | | | | | | | | | | | | | | | | | | | | | | | We should move forward to remove the old board init code. Add a prominent message to encourage maintainers to get started on this work. Signed-off-by: Simon Glass <sjg@chromium.org>
* | | spl_mmc/CONFIG_SPL_OS_BOOT: Allow environment to determine what to bootTom Rini2014-04-17-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | We add two new environment variables, falcon_args_file and falcon_image_file, which when set will override the compiled in default values for falcon mode. Signed-off-by: Tom Rini <trini@ti.com>
* | | README.falcon: Document environment variables for falcon modeTom Rini2014-04-17-0/+9
|/ / | | | | | | Signed-off-by: Tom Rini <trini@ti.com>
* | Merge branch 'u-boot/master' into 'u-boot-arm/master'Albert ARIBAUD2014-04-08-5/+17
|\ \ | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/cpu/arm926ejs/mxs/Makefile include/configs/trats.h include/configs/trats2.h include/mmc.h
| * | Revert "Start the deprecation process for generic board"Tom Rini2014-04-04-189/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | We've run into a non-trivial conversion to CONFIG_SYS_GENERIC_BOARD so we'll postpone this notice until right after v2014.04 is out. This reverts commit 36c4b1d98059244c34ec3327d9cc9f3c552fd01b. Signed-off-by: Tom Rini <trini@ti.com>
| * | cmd:gpt: randomly generate each partition uuid if undefinedPrzemyslaw Marczak2014-04-02-5/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes: - randomly generate partition uuid if any is undefined and CONFIG_RAND_UUID is defined - print debug info about set/unset/generated uuid - update doc/README.gpt Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Cc: Piotr Wilczek <p.wilczek@samsung.com> Cc: Tom Rini <trini@ti.com> Cc: Stephen Warren <swarren@nvidia.com> Cc: Lukasz Majewski <l.majewski@samsung.com>
| * | Start the deprecation process for generic boardSimon Glass2014-03-28-0/+189
| |/ | | | | | | | | | | | | | | We should move forward to remove the old board init code. Add a prominent message to encourage maintainers to get started on this work. Signed-off-by: Simon Glass <sjg@chromium.org>
* | Merge branch 'u-boot/master' into 'u-boot-arm/master'Albert ARIBAUD2014-03-25-6/+28
|\ \ | |/ | | | | | | | | | | | | Trivial merge conflict, needed to manually remove local_info as per commit 41364f0f. Conflicts: board/samsung/common/board.c
| * sandbox: Add LCD driverSimon Glass2014-03-17-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a simple LCD driver which uses SDL to display the image. We update the image regularly, while still providing for reasonable performance. Adjust the common lcd code to support sandbox. For command-line runs we do not want the LCD to be displayed, so add a --show_lcd option to enable it. Tested-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
| * kbuild: rename TOPDIR to stctreeMasahiro Yamada2014-03-12-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Prior to Kbuild, $(TOPDIR) or $(SRCTREE) was used for pointing to the top of source directory. (No difference between the two.) In Kbuild style, $(srctree) is used instead. This commit renames TOPDIR to srctree and delete the defition of TOPDIR. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
| * kirkwood: kwbimage: refactor CONFIG_SYS_KWD_CONFIGMasahiro Yamada2014-03-12-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull out "$(SRCTREE)/" from CONFIG_SYS_KWD_CONFIG and push it into the top Makefile. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Michael Walle <michael@walle.cc> Cc: Simon Guinot <simon.guinot@sequanux.org> Cc: Dave Purdy <david.c.purdy@gmail.com> Cc: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net> Cc: Luka Perkov <luka@openwrt.org> Cc: Valentin Longchamp <valentin.longchamp@keymile.com> Cc: Jason Cooper <u-boot@lakedaemon.net> Cc: Siddarth Gore <gores@marvell.com> Cc: Prafulla Wadaskar <prafulla@marvell.com> Cc: Eric Cooper <ecc@cmu.edu> Cc: Suriyan Ramasami <suriyan.r@gmail.com>
| * usb: net: update README.usb to list all USB ethernet optionsGerhard Sittig2014-03-12-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | - extend the discussion of USB network related config options such that all available adapter drivers are listed, and that the 'usb' command for the interactive prompt and scripting becomes available - suggest to *not* put individual IP configuration parameters into the exectuable, but instead to put them into external environment or fetch them from network Signed-off-by: Gerhard Sittig <gsi@denx.de> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* | video:mipidsim:fdt: Add DT support for mipi dsim driverPiotr Wilczek2014-03-12-0/+82
|/ | | | | | | | | This patch enables parsing mipi data from device tree. Non device tree case is still supported. Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* m68k: Remove M5271EVB and idmr board supportMasahiro Yamada2014-03-10-7/+9
| | | | | | | | | | | | | | | | CONFIG_SYS_HZ must be always 1000, but M5271EVB.h defines it as 1000000 and idmr.h defines it as (50000000 / 64). When compiling these two boards, a warning message is displayed: time.c:14:2: warning: #warning "CONFIG_SYS_HZ must be 1000 and should not be defined by platforms" [-Wcpp] There are no board maintainers for them so this commit just deletes them. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Jason Jin <Jason.jin@freescale.com>
* Merge branch 'master' of git://git.denx.de/u-boot-mipsTom Rini2014-03-04-1/+1
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| * malta: correct tcl script path in README.maltaJames Hogan2014-03-04-1/+1
| | | | | | | | | | | | | | | | | | README.malta referred to board/malta, but malta has now been moved within board/imgtec/, so correct the path. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com> Cc: Paul Burton <paul.burton@imgtec.com>
* | dm: Remove old driver model documentationSimon Glass2014-03-04-3662/+0
| | | | | | | | | | | | | | | | | | | | | | This documentation pertains to the planned implementation of driver model in U-Boot for each subsystem, but it has not been superseded. It is probably better to have this documentation in the source code for each subsystem where possible, so that docbook will pick it up. Where this does not make sense, new documentation can be placed in some suitable file in doc/driver-model. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: Add README for driver modelSimon Glass2014-03-04-0/+368
|/ | | | | | This adds a README to help with understanding of this series. Signed-off-by: Simon Glass <sjg@chromium.org>
* Merge branch 'master' of git://git.denx.de/u-boot-armTom Rini2014-02-26-122/+240
|\ | | | | | | | | | | | | | | | | Conflicts: arch/arm/cpu/armv7/config.mk board/ti/am43xx/mux.c include/configs/am43xx_evm.h Signed-off-by: Tom Rini <trini@ti.com>
| * arm: Switch to -mno-unaligned-access when supported by the compilerTom Rini2014-02-26-122/+240
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we tell the compiler to optimize for ARMv7 (and ARMv6 for that matter) it assumes a default of SCTRL.A being cleared and unaligned accesses being allowed and fast at the hardware level. We set this bit and must pass along -mno-unaligned-access so that the compiler will still breakdown accesses and not trigger a data abort. To better help understand the requirements of the project with respect to unaligned memory access, the Documentation/unaligned-memory-access.txt file has been added as doc/README.unaligned-memory-access.txt and is taken from the v3.14-rc1 tag of the kernel. Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Mans Rullgard <mans@mansr.com> Signed-off-by: Tom Rini <trini@ti.com>
* | kbuild: consolidate version and timestamp headers generationMasahiro Yamada2014-02-25-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Generate include/generated/{timestamp.h, version.h} more simply by using filechk rule. - Add $(UBOOTRELEASE) variable and re-write u-boot.imx rule more simply. - Rename U_BOOT_VERSION in Makefile to UBOOTVERSION Before this commit, the same variable name, "U_BOOT_VERSION" was used for two different strings. One of them was defined in Makefile. It takes the form like "2014.01-rc1" and used in makefiles and script files. The other is defined in include/generated/version.h It takes the form like "U-Boot 2014.01-rc1-00010-gbe6d426-dirty" and used in C and Aseembler. It is confusing when grepping the source tree. So, this commit renames the former to UBOOTVERSION. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* | Merge branch 'master' of git://git.denx.de/u-boot-spiTom Rini2014-02-21-0/+76
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| * doc: SPI: Add qspi test details on AM43xxSourav Poddar2014-02-18-0/+76
| | | | | | | | | | | | | | This shows the log obtained while testing qspi on AM437x board. Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* | Merge branch 'u-boot/master' into 'u-boot-arm/master'Albert ARIBAUD2014-02-20-44/+44
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: Makefile drivers/net/npe/Makefile These two conflicts arise from commit 0b2d3f20 ("ARM: NET: Remove the IXP NPE ethernet driver") and are resolved by deleting the drivers/net/npe/Makefile file and removing the CONFIG_IXP4XX_NPE line from Makefile.
| * | kernel-doc: fix some errorsMasahiro Yamada2014-02-19-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Delete fs.xml from DOCBOOKS to fix an error. Commit e3ff797c added fs.xml to DOCBOOKS but missed to add doc/DocBook/fs.tmpl. - Fix the location of include guard in include/linker_lists.h. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reported-by: Abraham Varricatt <abraham.varricatt@vvdntech.com> Acked-by: Simon Glass <sjg@chromium.org>
| * | kernel-doc: update kernel-doc related files to Linux v3.13Masahiro Yamada2014-02-19-2/+0
| | | | | | | | | | | | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
| * | kernel-doc: move kernel-doc tools to scripts/Masahiro Yamada2014-02-19-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tools/kernel-doc/docproc.c and tools/kernel-doc/kernel-doc are files imported from Linux Kernel. They originally resided under scripts/ directory in Linux Kernel. This commit moves them to the original location. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
| * | kbuild: use Linux Kernel build scriptsMasahiro Yamada2014-02-19-30/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now we are ready to switch over to real Kbuild. This commit disables temporary scripts: scripts/{Makefile.build.tmp, Makefile.host.tmp} and enables real Kbuild scripts: scripts/{Makefile.build,Makefile.host,Makefile.lib}. This switch is triggered by the line in scripts/Kbuild.include -build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build.tmp obj +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj We need to adjust some build scripts for U-Boot. But smaller amount of modification is preferable. Additionally, we need to fix compiler flags which are locally added or removed. In Kbuild, it is not allowed to change CFLAGS locally. Instead, ccflags-y, asflags-y, cppflags-y, CFLAGS_$(basetarget).o, CFLAGS_REMOVE_$(basetarget).o are prepared for that purpose. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>
| * | kbuild: change out-of-tree buildMasahiro Yamada2014-02-19-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit changes the working directory where the build process occurs. Before this commit, build process occurred under the source tree for both in-tree and out-of-tree build. That's why we needed to add $(obj) prefix to all generated files in makefiles like follows: $(obj)u-boot.bin: $(obj)u-boot Here, $(obj) is empty for in-tree build, whereas it points to the output directory for out-of-tree build. And our old build system changes the current working directory with "make -C <sub-dir>" syntax when descending into the sub-directories. On the other hand, Kbuild uses a different idea to handle out-of-tree build and directory descending. The build process of Kbuild always occurs under the output tree. When "O=dir/to/store/output/files" is given, the build system changes the current working directory to that directory and restarts the make. Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>" syntax for descending into sub-directories. (We can write it like "make $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>