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2020-04-17doc: fix references to driver-modelHeinrich Schuchardt
Fix some errors pointed out by 'make refcheckdocs'. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-02-12doc: Fix CONFIG_OF_SEPARATE descriptionAndy Shevchenko
CONFIG_OF_SEPARATE description is not in align with actual code in Makefile and thus has misleading instructions and explanation. Make it aligned with the actual code. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-12-10lib: fdtdec: Add function re-setup the fdt more effecientlyJean-Jacques Hiblot
In some cases it may be useful to be able to change the fdt we have been using and use another one instead. For example, the TI platforms uses an EEPROM to store board information and, based on the type of board, different dtbs are used by the SPL. When DM_I2C is used, a first dtb must be used before the I2C is initialized and only then the final dtb can be selected. To speed up the process and reduce memory usage, introduce a new function fdtdec_setup_best_match() that re-use the DTBs loaded in memory by fdtdec_setup() to select the best match. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-10-09doc: Update docs for device tree in SPL, TPLSimon Glass
Make a few small updates to indicate that device tree can be used in SPL and TPL. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-09fdt: Document the fact that dtc is now builtSimon Glass
This documentation is out of date now that U-Boot builds dtc automatically. Update it. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2017-05-09Allow boards to initialize the DT at runtime.Alex Deymo
In some boards like the Raspberry Pi the initial bootloader will pass a DT to the kernel. When using U-Boot as such kernel, the board code in U-Boot should be able to provide U-Boot with this, already assembled device tree blob. This patch introduces a new config option CONFIG_OF_BOARD to use instead of CONFIG_OF_EMBED or CONFIG_OF_SEPARATE which will initialize the DT from a board-specific funtion instead of bundling one with U-Boot or as a separated file. This allows boards like the Raspberry Pi to reuse the device tree passed from the bootcode.bin and start.elf firmware files, including the run-time selected device tree overlays. Signed-off-by: Alex Deymo <deymo@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-03-20doc: move documentation for /config node into a separate filePhilipp Tomsich
This moves the description of the /config node from README.fdt-control into a separate file doc/device-tree-bindings/config.txt. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27Remove/update old generic-board documentation and warningSimon Glass
Remove the warning from the Makefile, since boards that do not use generic board will no longer build. Also update documentation. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
2015-10-23env: export fdt_blob to the environment variableThomas Chou
Export fdt_blob to the environment variable. So that we may use it to boot Linux. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Acked-by: Simon Glass <sjg@chromium.org>
2015-04-16x86: video: Allow keyboard presence to be controlled by device treeSimon Glass
At present a VGA console assumes a keyboard unless a CONFIG option is set. This difference can be dealt with by a device tree option, allowing boards that are otherwise the same to use the same configuration. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-19fdt: Rename the DEV_TREE_BIN Makefile flag to to EXT_DTBSimon Glass
This seems like a better name. This is a patch-up to the earlier commit 63b4b5b, and also removes a redundant Makefile change. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-11fdt: Add DEV_TREE_BIN option to specify a device tree binary fileSimon Glass
In some cases, an externally-built device tree binary is required to be attached to U-Boot. An example is when using image signing, since in that case the .dtb file must include the public keys. Add a DEV_TREE_BIN option to the Makefile, and update the documentation. Usage is something like: make DEV_TREE_BIN=boot/am335x-boneblack-pubkey.dtb Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-05FDT: Fix DTC repository referencesJon Loeliger
The Device Tree Compiler (DTC) used to have its master repository located on jdl.com. While it is still there, its official, new, shiny location is on kernel.org here: git://git.kernel.org/pub/scm/utils/dtc/dtc.git Update a few references to point there instead. Signed-off-by: Jon Loeliger <jdl@jdl.com> Acked-by: Simon Glass <sjg@chromium.org>
2013-08-02config: don't define CONFIG_ARCH_DEVICE_TREEStephen Warren
Now that nothing uses CONFIG_ARCH_DEVICE_TREE, stop defining it. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2013-05-14Add minor updates to README.fdt-controlSimon Glass
A few things have changed since this doc was written, so update it to match the current state of things. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-05-01sandbox: Add CONFIG_OF_HOSTFILE to read FDT from host fileSimon Glass
With sandbox it is tricky to add an FDT to the image at build time (or later) since we build an ELF file, not a plain binary, and the address space of the whole U-Boot is not accessible in the emulated memory map of sandbox. Sandbox can read files directly from the host, though, so add an option to read an FDT from a host file on start-up. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-04-02dts/Makefile: Build the user specified dtsJagannadha Sutradharudu Teki
This patch provides a support to build the user specified dts. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
2011-10-26fdt: ARM: Add fdtcontroladdr to set device tree address in environmentSimon Glass
This adds support for a new environment variable called 'fdtcontroladdr'. If defined, the hex address is used as the address of the control fdt for U-Boot. Note: I have not changed CONFIG_PRAM section as I already have an outstanding patch on that. Signed-off-by: Simon Glass <sjg@chromium.org>
2011-10-26fdt: Add support for embedded device tree (CONFIG_OF_EMBED)Simon Glass
This new option allows U-Boot to embed a binary device tree into its image to allow run-time control of peripherals. This device tree is for U-Boot's own use and is not necessarily the same one as is passed to the kernel. The device tree compiler output should be placed in the $(obj) rooted tree. Since $(OBJCOPY) insists on adding the path to the generated symbol names, to ensure consistency it should be invoked from the directory where the .dtb file is located and given the input file name without the path. This commit contains my entry for the ugliest Makefile / shell interaction competition. Signed-off-by: Simon Glass <sjg@chromium.org>