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* ARM64: zynqmp: Add support for standard distro boot commandsMichal Simek2016-06-06-57/+44
| | | | | | | | | | | | | Nand and QSPI are not defined now but this will be extended. Based on selected bootmode boot_targets are rewritten. Patch also contains detection if variables are saved. If yes don't rewrite boot_targets variable. Also move variable setup to the end of file because SCSI needs to be defined before others macros are using it. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Alexander Graf <agraf@suse.de>
* ARM64: zynqmp: Remove CONFIG_BOOTP_SERVERIPAlexander Graf2016-06-06-1/+0
| | | | | | | | | | | | | When the CONFIG_BOOTP_SERVERIP option is set, we ignore all dhcp values for the tftp server and use our own serverip and file name instead. This is usually not what we want and I doubt it's set for a good reason on ZynqMP. It definitely hurts if we want to support uEFI PXE boot on it. So just remove the option for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* ARM64: zynqmp: Enable AHCI when CONFIG_SATA_CEVA is definedMichal Simek2016-06-06-2/+2
| | | | | | | Simplify zcu102 board file by moving CONFIG_AHCI enabling to common file. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* env: Setup GD_FLG_ENV_DEFAULT flag when default environment are usedMichal Simek2016-06-06-0/+1
| | | | | | | | Setup flag when default environment are used to be able to rewrite default distro boot variables based on SoC boot mode. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Alexander Graf <agraf@suse.de>
* ARM64: zynqmp: Add support for zc1751-dc4Michal Simek2016-06-06-0/+24
| | | | | | zc1751-dc4 contains four GEMs. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* ARM64: zynqmp: Enable Vitesse and RealTek ethernet physMichal Simek2016-06-06-0/+2
| | | | | | Phys are available on zc1751-dc4 that's why enable them. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* ARM64: zynqmp: Enable CMD_NAND via KconfigMichal Simek2016-06-06-1/+0
| | | | | | Simplify board file by enabling CMD_NAND via Kconfig. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* Merge branch 'master' of git://git.denx.de/u-boot-socfpgaTom Rini2016-06-02-7/+235
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| * arm: socfpga: improve raw MMC SPL bootSylvain Lesne2016-06-01-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Before this patch, when booting from MMC (no filesystem), the SPL loaded U-Boot from a fixed offset. It will now load U-Boot from an offset of 256kB (which is 4 times the padded SPL image) in the third partition. This behaviour is similar to what the vendor SPL (based on U-Boot 2013.01) does, and allows to directly 'dd' the u-boot-with-spl.sfp file to the A2 partition. Signed-off-by: Sylvain Lesne <lesne@alse-fr.com>
| * arm: socfpga: Add missing ',' in CONFIG_BOOTARGSStefan Roese2016-06-01-1/+1
| | | | | | | | | | | | | | | | | | | | Somehow the sr1500 is missing this comma in the CONFIG_BOOTARGS definition. This patch adds it to. Signed-off-by: Stefan Roese <sr@denx.de> Reported-by: Pavel Machek <pavel@denx.de> Cc: Pavel Machek <pavel@denx.de> Cc: Marek Vasut <marex@denx.de>
| * arm: socfpga: Enable tiny printf and simple malloc in SPLMarek Vasut2016-06-01-3/+0
| | | | | | | | | | | | | | | | | | | | Enable both features to reduce the SPL size by 6 kiB. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chin Liang See <clsee@altera.com> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Cc: Pavel Machek <pavel@denx.de> Cc: Stefan Roese <sr@denx.de>
| * arm: socfpga: Add samtec VIN|ING boardMarek Vasut2016-06-01-0/+231
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for board based on the popular Altera Cyclone V SoC. This board has the following properties: - 1 GiB of DRAM - 1 Gigabit ethernet - 1 USB gadget port - 1 USB host port with an on-board hub - 2 QSPI NORs connected to the Cadence QSPI core - Multiple I2C EEPROMs and one I2C temperature sensor Signed-off-by: Marek Vasut <marex@denx.de> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Cc: Chin Liang See <clsee@altera.com> --- V2: Update the defconfig as per Tom's request
* | mips: wdr4300: Move the CONFIG_USE_PRIVATE_LIBGCC to KconfigMarek Vasut2016-06-02-2/+0
|/ | | | | | | | | | This fixes the last remaining libgcc warning, where the symbol was defined twice. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Tom Rini <trini@konsulko.com>
* Merge branch 'master' of git://git.denx.de/u-boot-mipsTom Rini2016-05-31-60/+18
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| * mips: ath79: Use 8MB flash profile for mtd partition by defaultWills Wang2016-05-31-5/+5
| | | | | | | | | | | | Change bootm flash address and mtd partition table for 8MB flash profile. Signed-off-by: Wills Wang <wills.wang@live.com>
| * MIPS: Split I & D cache line size configPaul Burton2016-05-31-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | Allow L1 Icache & L1 Dcache line size to be specified separately, since there's no architectural mandate that they be the same. The [id]cache_line_size functions are tidied up to take advantage of the fact that the Kconfig entries are always present to simply check them for zero rather than needing to #ifdef on their presence. Signed-off-by: Paul Burton <paul.burton@imgtec.com> [removed CONFIG_SYS_CACHELINE_SIZE in include/configs/pic32mzdask.h] Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
| * MIPS: Move cache sizes to KconfigPaul Burton2016-05-31-49/+0
| | | | | | | | | | | | | | | | | | | | | | | | Move details of the L1 cache line sizes & total sizes into Kconfig, defaulting to 0. A new CONFIG_SYS_CACHE_SIZE_AUTO Kconfig entry is introduced to allow platforms to select auto-detection of cache sizes, and it defaults to being enabled if none of the cache sizes are set by the configuration (ie. sizes are all the default 0), and code is adjusted to #ifdef on that rather than on the definition of the sizes (which will always be defined even if 0). Signed-off-by: Paul Burton <paul.burton@imgtec.com>
| * malta: Allow MIPS64 buildsPaul Burton2016-05-31-5/+13
| | | | | | | | | | | | | | | | Both real Malta boards & emulators that mimic Malta (eg. QEMU) can support MIPS64 CPUs. Allow MIPS64 builds of U-Boot for such boards, which enables the user to make use of the whole 64 bit address space. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
* | Merge git://www.denx.de/git/u-boot-marvellTom Rini2016-05-31-0/+2
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| * | arm: spear: x600: Add support for Micrel KSZ9031 PHYStefan Roese2016-05-31-0/+2
| |/ | | | | | | | | | | | | | | As the old ethernet PHY is not available any more, the x600 board has been redesigned with the Micrel KSZ9031 PHY. This patch adds support to autodetect the PHY and configure the Micrel PHY correctly. Signed-off-by: Stefan Roese <sr@denx.de>
* | Revert "image.h: Tighten up content using handy CONFIG_IS_ENABLED() macro."Masahiro Yamada2016-05-31-12/+57
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 56adbb38727320375b2f695bd04600d766d8a1b3. Since commit 56adbb387273 ("image.h: Tighten up content using handy CONFIG_IS_ENABLED() macro."), I found my boards fail to boot Linux because the commit changed the logic of macros it touched. Now, IMAGE_ENABLE_RAMDISK_HIGH and IMAGE_BOOT_GET_CMDLINE are 0 for all the boards. As you can see in include/linux/kconfig.h, CONFIG_IS_ENABLE() (and IS_ENABLED() as well) can only take a macro that is either defined as 1 or undefined. This is met for boolean options defined in Kconfig. On the other hand, CONFIG_SYS_BOOT_RAMDISK_HIGH and CONFIG_SYS_BOOT_GET_CMDLINE are defined without any value in arch/*/include/asm/config.h . This kind of clean-up is welcome, but the options should be moved to Kconfig beforehand. Moreover, CONFIG_IS_ENABLED(SPL_CRC32_SUPPORT) looks weird. It should be either CONFIG_IS_ENABLED(CRC32_SUPPORT) or IS_ENABLED(CONFIG_SPL_CRC32_SUPPORT). But, I see no define for CONFIG_SPL_CRC32_SUPPORT anywhere. Likewise for the other three. The logic of IMAGE_OF_BOARD_SETUP and IMAGE_OF_SYSTEM_SETUP were also changed for SPL. This can be a problem for boards defining CONFIG_SPL_OF_LIBFDT. I guess it should have been changed to IS_ENABLED(CONFIG_OF_BOARD_SETUP). In the first place, if we replace the references in C code, the macros IMAGE_* will go away. if (IS_ENABLED(CONFIG_OF_BOARD_SETUP) { ... } Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* Merge git://git.denx.de/u-boot-dmTom Rini2016-05-27-80/+337
|\ | | | | | | | | | | | | | | | | | | | | | | | | For odroid-c2 (arch-meson) for now disable designware eth as meson now needs to do some harder GPIO work. Signed-off-by: Tom Rini <trini@konsulko.com> Conflicts: lib/efi_loader/efi_disk.c Modified: configs/odroid-c2_defconfig
| * dm: mmc: dwmmc: Support CONFIG_BLKSimon Glass2016-05-27-1/+6
| | | | | | | | | | | | Add support for using driver model for block devices in this driver. Signed-off-by: Simon Glass <sjg@chromium.org>
| * dm: efi: Update for CONFIG_BLKSimon Glass2016-05-27-1/+1
| | | | | | | | | | | | | | | | This code does not currently build with driver model enabled for block devices. Update it to correct this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Alexander Graf <agraf@suse.de>
| * rockchip: Drop SPL GPIO support for rk3288Simon Glass2016-05-27-1/+0
| | | | | | | | | | | | This is not currently used and saves a little over 1KB of SPL image size. Signed-off-by: Simon Glass <sjg@chromium.org>
| * mmc: Drop dead mmc code for non-generic MMCSimon Glass2016-05-26-4/+0
| | | | | | | | | | | | | | All boards that use MMC define CONFIG_GENERIC_MMC now, so we can drop this old code. Signed-off-by: Simon Glass <sjg@chromium.org>
| * mmc: Drop mmc_register()Simon Glass2016-05-26-1/+0
| | | | | | | | | | | | This function is no longer used. Signed-off-by: Simon Glass <sjg@chromium.org>
| * arm: rpi: Define CONFIG_TFTP_TSIZE to show tftp size infoSimon Glass2016-05-26-0/+1
| | | | | | | | | | | | | | | | This shows a proper progress display and the total amount of data transferred. Enable it for Raspberry Pi. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org>
| * Add a mailbox driver framework/uclassStephen Warren2016-05-26-0/+233
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A mailbox is a hardware mechanism for transferring small message and/or notifications between the CPU on which U-Boot runs and some other device such as an auxilliary CPU running firmware or a hardware module. This patch defines a standard API that connects mailbox clients to mailbox providers (drivers). Initially, DT is the only supported method for connecting the two. The DT binding specification (mailbox.txt) was taken from Linux kernel v4.5's Documentation/devicetree/bindings/mailbox/mailbox.txt. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
| * Rename reset to sysresetStephen Warren2016-05-26-72/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The current reset API implements a method to reset the entire system. In the near future, I'd like to introduce code that implements the device tree reset bindings; i.e. the equivalent of the Linux kernel's reset API. This controls resets to individual HW blocks or external chips with reset signals. It doesn't make sense to merge the two APIs into one since they have different semantic purposes. Resolve the naming conflict by renaming the existing reset API to sysreset instead, so the new reset API can be called just reset. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
| * dm: allow setting driver_data before/during bindStephen Warren2016-05-26-0/+24
| | | | | | | | | | | | | | | | | | | | | | This will allow a driver's bind function to use the driver data. One example is the Tegra186 GPIO driver, which instantiates child devices for each of its GPIO ports, yet supports two different HW instances each with a different set of ports, and identified by the udevice_id .data field. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
* | image.h: Tighten up content using handy CONFIG_IS_ENABLED() macro.Robert P. J. Day2016-05-27-57/+12
| | | | | | | | | | | | | | | | | | | | In order for CONFIG_IS_ENABLED(FOO) to work we need to move the changes that CONFIG_FIT_DISABLE_SHA256 makes to be prior to the evaluation by CONFIG_IS_ENABLED(foo) Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> [trini: Move CONFIG_FIT_DISABLE_SHA256 parts to fix build breakage] Signed-off-by: Tom Rini <trini@konsulko.com>
* | board: am335x: Allow to choose serial device dynamicallyLokesh Vutla2016-05-27-0/+4
| | | | | | | | | | | | | | | | Different AM335x based platforms have different serial consoles. As serial console is Kconfig option a separate defconfig has to be created for each platform. So pass the serial device dynamically. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | config: env: Set AM335x-ICEv2 board specific envLokesh Vutla2016-05-27-0/+9
| | | | | | | | | | | | | | Populate the right dtb file and console for AM335x-ICEv2 board. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | board: AM335x-ICEv2: Add cpsw supportLokesh Vutla2016-05-27-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to enable cpsw on AM335x ICEv2 board, the following needs to be done: 1)There are few on board jumper settings which gives a choice between cpsw and PRUSS, that needs to be properly selected[1]. Even after selecting this, there are few GPIOs which control these muxes that needs to be held high. 2) The clock to PHY is provided by a PLL-based clock synthesizer[2] connected via I2C. This needs to properly programmed and locked for PHY operation. And PHY needs to be reset before before being used, which is also held by a GPIO. 3) RMII mode needs to be selected. [1] http://www.ti.com/lit/zip/tidr336 [2] http://www.ti.com/lit/ds/symlink/cdce913.pdf Reviewed-by: Tom Rini <trini@konsulko.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | configs: am335x_evm: Switch to env on FAT SD by defaultTom Rini2016-05-27-19/+21
| | | | | | | | | | | | | | | | Re-org env sections so that we can fall back to env is in FAT on SD card, for broader board compatibility Signed-off-by: Tom Rini <trini@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | ARM: dts: AM335x-evmsk: Add initial supportLokesh Vutla2016-05-27-0/+37
| | | | | | | | | | | | | | Add initial DTS support for AM335x-evm sk. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | ARM: dts: AM43x-EPOS Initial SupportLokesh Vutla2016-05-27-0/+14
| | | | | | | | | | | | | | Add initial DTS support for AM43-EPOS evm. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
* | Remove unused BOOTFLAG definitionsChris Packham2016-05-27-16/+0
| | | | | | | | | | | | | | | | This follows on from commit d98b052 ("powerpc: Cleanup BOOTFLAG_* references") and commit fc3d297 ("Drop bogus BOOTFLAG_* definitions"). Remove the definitions that have crept in since. Signed-off-by: Chris Packham <judge.packham@gmail.com>
* | spl: Allow to load a FIT containing U-Boot from FSLokesh Vutla2016-05-27-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | This provides a way to load a FIT containing U-Boot and a selection of device tree files from a File system. Making sure that all the reads and writes are aligned to their respective needs. Tested-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [trini: Make this still apply with Michal's alignment change for 'fit'] Signed-off-by: Tom Rini <trini@konsulko.com>
* | ti_omap5_common: Update SPL start address on secure partsDaniel Allred2016-05-27-5/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Updated the CONFIG_SPL_TEXT_BASE to support secure parts (moving the start address past secure reserved memory and the size of the security certificate that precedes the boot image on secure devices). Updated the related CONFIG_SPL_MAX_SIZE to properly reflect the internal memory actually available on the various device flavors (Common minimum internal RAM guaranteed for various flavors of DRA7xx/AM57xx is 512KB). Signed-off-by: Daniel Allred <d-allred@ti.com> Signed-off-by: Madan Srinivas <madans@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
* | ti: AM43xx: board: Detect AM43xx HS EVMMadan Srinivas2016-05-27-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds code to detect AM43xx HS EVMS - the string in the I2C EEPROM for HS EVMs differs from GP EVMs. Adds code to for evm detection, regardless of whether the evm is for GP or HS parts, and updates board init to use that. Modifies findfdt command to pick up am437x-gp-evm.dtb for the HS EVMs also, as the boards are similar except for some security specific changes around power supply and enclosure protection. Signed-off-by: Madan Srinivas <madans@ti.com> Signed-off-by: Daniel Allred <d-allred@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
* | ti: AM43xx: Use CONFIG options from SOC KconfigMadan Srinivas2016-05-27-12/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Updates configs/am43xx_evm.h to use CONFIG options from SOC specific Kconfig file for various calculations. On AM43x devices, the address of SPL entry point depends on the device type, i.e. whether it is secure or non-secure. Further, for non-secure devices, the SPL entry point is different between USB HOST boot mode, other "memory" boot modes (MMC, NAND) and "peripheral" boot modes (UART, USB) To add to the complexity, on secure devices, in addition to the above differences, the SPL entry point can change because of the space occupied by other components (other than u-boot or spl) that go into a secure boot image. To prevent the user from having to modify source files every time any component of the secure image changes, the value of CONFIG_SPL_TEXT_BASE has been set using a Kconfig option that is supplied in the am43xx_*_defconfig files Using the CONFIG options also enables us to do away with some compile time flags that were used to specify CONFIG_SPL_TEXT_BASE for different boot modes. On QSPI devices, the same problem described above occurs w.r.t. the address of the u-boot entry point in flash, when booting secure devices. To handle this, CONFIG_SYS_TEXT_BASE is also setup via a Kconfig option and the defconfig files. Signed-off-by: Madan Srinivas <madans@ti.com> Signed-off-by: Daniel Allred <d-allred@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com> Tested-by: Andreas Dannenberg <dannenberg@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
* | arm: Kconfig: Add support for AM43xx SoC specific KconfigMadan Srinivas2016-05-27-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding support for AM43xx secure devices require the addition of some SOC specific config options like the amount of memory used by public ROM and the address of the entry point of u-boot or SPL, as seen by the ROM code, for the image to be built correctly. This mandates the addition of am AM43xx CONFIG option and the ARM Kconfig file has been modified to source this SOC Kconfig file. Moving the TARGET_AM43XX_EVM config option to the SOC KConfig and out of the arch/arm/Kconfig. Updating defconfigs to add the CONFIG_AM43XX=y statement and removing the #define CONFIG_AM43XX from the header file. Signed-off-by: Madan Srinivas <madans@ti.com> Signed-off-by: Daniel Allred <d-allred@ti.com> Tested-by: Andreas Dannenberg <dannenberg@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
* | Drop references to CONFIG_SYS_GENERIC_BOARD in config filesSimon Glass2016-05-27-7/+0
| | | | | | | | | | | | This option is no longer used so need not be enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
* | Drop use of CONFIG_SYS_GENERIC_BOARD in U-BootSimon Glass2016-05-27-2/+1
| | | | | | | | | | | | | | | | This option is always enabled and is about to be removed. Drop references to it. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
* | openrisc: Drop the arch-specific board initSimon Glass2016-05-27-0/+1
| | | | | | | | | | | | | | | | | | It is well past the deadline for conversion to generic board init. Remove the old code. Stefan, can you test this please and perhaps send a follow-up patch if needed? Signed-off-by: Simon Glass <sjg@chromium.org>
* | efi_loader: Add bounce buffer supportAlexander Graf2016-05-27-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | Some hardware that is supported by U-Boot can not handle DMA above 32bits. For these systems, we need to come up with a way to expose the disk interface in a safe way. This patch implements EFI specific bounce buffers. For non-EFI cases, this apparently was no issue so far, since we can just define our environment variables conveniently. Signed-off-by: Alexander Graf <agraf@suse.de>
* | arm: add initial support for Amlogic Meson and ODROID-C2Beniamino Galvani2016-05-27-0/+51
| | | | | | | | | | | | | | | | | | | | | | | | This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a board definition for ODROID-C2. This initial submission only supports UART and Ethernet (through the existing Designware driver). DTS files are the ones submitted to Linux arm-soc for 4.7 [1]. [1] https://patchwork.ozlabs.org/patch/603583/ Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* | distro: Add efi pxe boot codeAlexander Graf2016-05-27-1/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we can expose network functionality to EFI applications, the logical next step is to load them via pxe to execute them as well. This patch adds the necessary bits to the distro script to automatically load and execute EFI payloads. It identifies the dhcp client as a uEFI capable PXE client, hoping the server returns a tftp path to a workable EFI binary that we can then execute. To enable boards that don't come with a working device tree preloaded, this patch also adds support to load a device tree from the /dtb directory on the remote tftp server. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Tom Rini <trini@konsulko.com>