The ipu has two display interfaces. Make the used one a parameter
in struct display_info_t instead of using unconditionally DI0.
DI0 is the default setting.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Reviewed-by: Eric Nelson <eric@nelint.com>
If CONFIG_SPL_LIBCOMMON_SUPPORT is not defined there is a lone case statement
at the end of the switch leading to a compile error.
Remove the offending case statement.
| common/spl/spl_mmc.c:339:7: error: label at end of compound statement
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Reviewed-by: Tom Rini <trini@konsulko.com> Acked-by: Marek Vasut <marex@denx.de>
Marcin Niestroj [Fri, 21 Oct 2016 11:53:54 +0000 (13:53 +0200)]
ARM: mx6: add MMC2 boot device detection support in SPL
Check BOOT_CFG2[3:4] to determine which SD/MMC port is selected to boot
from. If MMC2 is selected return BOOT_DEVICE_MMC2. In all other cases
return BOOT_DEVICE_MMC1, as we do not have corresponding macro for MMC3
and MMC4.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Stefan Agner [Mon, 21 Nov 2016 18:58:52 +0000 (10:58 -0800)]
spl: dfu: move DFU Kconfig to SPL Kconfig
The DFU Kconfig menu entries should be part of the SPL
Kconfig file. Also avoid using the top level Makefile by
moving the config dependent build artifacts to the driver/
and driver/usb/gadget/ Makfiles.
With that, DFU can be built again in SPL if
CONFIG_SPL_DFU_SUPPORT is enabled.
Fixes: 6ad6102246d8 ("usb:gadget: Disallow DFU in SPL for now") Signed-off-by: Stefan Agner <stefan.agner@toradex.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Stefan Agner [Mon, 21 Nov 2016 18:58:51 +0000 (10:58 -0800)]
spl: add RAM boot device only if it is actually defined
Some devices (e.g. dra7xx) support loading to RAM using DFU without
having direct boot from RAM support. Make sure the linker list
does not contain BOOT_DEVICE_RAM if CONFIG_SPL_RAM_DEVICE is not
enabled.
Fixes: 98136b2f26fa ("spl: Convert spl_ram_load_image() to use linker list") Signed-off-by: Stefan Agner <stefan.agner@toradex.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
This fixes the loop delay when using a hw watchdog.
In case a watchdog is used that accesses CPU registers,
the defined delay of 20us in a tight loop will cause a
huge delay in the actual timeout seen. This is caused
by the fact that udelay will inheritantly call WATCHDOG_RESET.
Together with the omap wdt implementation, the seen timeout increases up to
around 30s. This makes the loop very slow and causes long
delays when using the modem.
Instead, implement the 2 sec loop by using the timer interface to know
when to break out of the timeout loop. Watchdog kicking is taken care of
by getc().
Signed-off-by: Tomas Melin <tomas.melin@vaisala.com>
Tang Yuantian [Mon, 21 Nov 2016 02:24:20 +0000 (10:24 +0800)]
sata: fix sata command can not being executed bug
Commit d97dc8a0 separated the non-command code into its own file
which caused variable sata_curr_device can not be set to a correct
value.
Before commit d97dc8a0, variable sata_curr_device can be set
correctly in sata_initialize().
After commit d97dc8a0, sata_initialize() is moved out to its own file.
Accordingly, variable sata_curr_device is removed from sata_initialize()
too. This caused sata_curr_device never gets a chance to be set properly
which prevent other commands from being executed.
This patch sets variable sata_curr_device properly.
Fixes: d97dc8a0 (dm: sata: Separate the non-command code into its
own file)
Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com> Reviewed-by: Simon Glass <sjg@chromium.org>
For block devices the sample fw_env.config does not mandate a erase block size
for block devices. A missing setting defaults to the full env size.
Depending on the environment location the alignment check now errors out for
perfectly legal settings.
Fix this by defaulting to the standard blocksize of 0x200 for environments
stored in a block device.
That keeps the fw_env.config files for block devices working even with that
new check.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
The Makefile in tools/ tries to find the "swig" utility by calling "which".
If nothing is found in the path, some versions of which will print an error
message:
$ make clean
which: no swig in (/usr/local/bin:/usr/bin:/bin)
This does not apply to all version of "which", though:
$ echo $0
bash
$ type which
which is aliased to `type -path'
$ which foo <== this version is OK
$ /usr/bin/which foo <== this one is chatty
/usr/bin/which: no foo in (/usr/local/bin:/usr/bin:/bin)
$ sh <== make uses /bin/sh
sh-4.3$ which foo <== no alias here
which: no foo in (/usr/local/bin:/usr/bin:/bin)
This error message is rather pointless in our case, since we just have
this very check to care for this. So add stderr redirection to suppress
the message.
Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Andrew F. Davis [Fri, 18 Nov 2016 17:56:16 +0000 (11:56 -0600)]
ti_armv7_keystone2: env: Add NFS loading support for PMMC and MON
NFS loading support has been added to the default environment for
most boot components, as PMMC and MON loading were added later they
did not originally get the NFS commands added, add these now.
Signed-off-by: Andrew F. Davis <afd@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Andrew F. Davis [Fri, 18 Nov 2016 17:56:15 +0000 (11:56 -0600)]
keystone2: Move target selection to Kconfig
The config option TARGET_K2x_EVM is set by the k2x defconfigs to pick
a board target, but the header configs also set K2x_EVM. This config
is redundant, remove it and use TARGET_K2x_EVM everywhere in its place.
Signed-off-by: Andrew F. Davis <afd@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Commit c68c62 ("i2c: mvtwsi: Make delay times frequency-dependent")
extensively used the ndelay function with a calculated parameter
which is dependant on the configured frequency of the I2C bus. If
standard speed is employed, the parameter is usually 10000 (10000ns
period length for 100kHz frequency).
But, since the arm architecture does not implement a proper version of
ndelay, the fallback default from include/linux/compat.h is used,
which defines every ndelay as udelay(1). This causes problems for
slower speeds on arm, since the delay time is now 9us too short for
the desired frequency, which leads to random failures of the I2C
interface.
To remedy this, we implement a proper, parameter-aware ndelay fallback
for architectures that don't implement a real ndelay function.
Reported-By: Jason Brown <Jason.brown@apcon.com>
To: Tom Rini <trini@konsulko.com>
To: Heiko Schocher <hs@denx.de> Signed-off-by: Mario Six <mario.six@gdsys.cc>
Marcel Ziswiler [Wed, 16 Nov 2016 16:49:24 +0000 (17:49 +0100)]
apalis/colibri_t30: move environment location
Now with the config block handling in place move the U-Boot environment
location before the config block at the end of 1st "boot sector" as
deployed during production using our downstream BSP.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Marcel Ziswiler [Wed, 16 Nov 2016 16:49:22 +0000 (17:49 +0100)]
toradex: config block handling
Add Toradex factory configuration block handling. The config block is a
data structure which gets stored to flash during production testing. The
structure holds such information as board resp. hardware revision,
product ID and serial number which is used as the NIC part of the
Ethernet MAC address as well. The config block will be read upon boot by
the show_board_info() function, displayed as part of the board
information and passed to Linux via device tree or ATAGs.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Drop CONFIG_CUSTOM_BOARDINFO as it is not Kconfig compliant and anyway
not really used anywhere plus the upcoming weak show_board_info()
approach seems much superior.
Add check for FDT_MAGIC, otherwise also legacy images will be loaded as
a FIT. With this check in place, the loader works correct both
with legacy and FIT images.
Signed-off-by: Tomas Melin <tomas.melin@vaisala.com> Acked-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Philipp Tomsich [Wed, 16 Nov 2016 01:40:27 +0000 (01:40 +0000)]
sun8i_emac: Fix mdio read sequence
To send a parametrized command to the PHY over MDIO, we should write
the data first, the trigger the execution by the command register
write. Fix the access pattern in our MDIO write routine.
Apparently this doesn't really matter with the Realtek PHY on the
Pine64, but other PHYs (which require more setup) will choke on
the wrong order.
[Andre: add commit message]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Jagan Teki <jagan@openedev.com>
Boris Brezillon [Tue, 8 Nov 2016 16:21:12 +0000 (17:21 +0100)]
mtd: nand: add support for the TC58NVG2S0H chip
Add the description of the Toshiba TC58NVG2S0H SLC nand to the nand_ids
table so we can use the NAND ECC infos and the ONFI timings.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Emmanuel Vadot [Sat, 5 Nov 2016 19:51:11 +0000 (20:51 +0100)]
sunxi: mmc: Set CONFIG_SYS_MMC_MAX_DEVICE
Set CONFIG_SYS_MMC_MAX_DEVICE to 4 for sunxi SoC.
This define is needed in the API code.
Signed-off-by: Emmanuel Vadot <manu@bidouilliste.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Yann E. MORIN [Mon, 31 Oct 2016 21:33:40 +0000 (22:33 +0100)]
arm: sunxi: do not force USB for arch-sunxi
Currently, USB is forced-enabled for the sunxi familly, and there is no
way to disable it.
However, USB takes a long time to initiliase, delaying the boot by up to
5 seconds (without any USB device attached!). This is a very long delay,
especially in cases where USB booting is not wanted at all, and where
the device is expected to boot relatively often (even in production).
Change the way the dependencies are handled, by only forcibly selecting
USB when CONFIG_DISTRO_DEFAULTS ("defaults suitable for booting general
purpose Linux distributions") is set. This option defaults to y for the
sunxi familly, so the current default behaviour is kept unchanged. Users
interested in boot time and/or size will be able to disable this to
further disable USB.
With USB disabled, the time spent in U-Boot before handing control to
the Linux kernel is about 1s now, down from ~5s (Nanopi Neo, sunxi H3).
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Ian Campbell <ijc@hellion.org.uk> Cc: Hans De Goede <hdegoede@redhat.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Alexander Graf [Fri, 18 Nov 2016 12:18:00 +0000 (13:18 +0100)]
travis: Add efi_loader grub2 test
We have all the building blocks now to run arbitrary efi applications
in travis. The most important one out there is grub2, so let's add
a simple test to verify that grub2 still comes up.
The deviation is tiny, but fails the overall build result. Since
the sleep test is not terribly important as gate keeper for travis
tests, let's just exclude it for this board.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Tom Rini <trini@konsulko.com>
Alexander Graf [Thu, 17 Nov 2016 21:40:10 +0000 (22:40 +0100)]
efi_loader: Allow to compile helloworld.efi w/o bundling it
Today we can compile a self-contained hello world efi test binary that
allows us to quickly verify whether the EFI loader framwork works.
We can use that binary outside of the self-contained test case though,
by providing it to a to-be-tested system via tftp.
This patch separates compilation of the helloworld.efi file from
including it in the u-boot binary for "bootefi hello". It also modifies
the efi_loader test case to enable travis to pick up the compiled file.
Because we're now no longer bloating the resulting u-boot binary, we
can enable compilation always, giving us good travis test coverage.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Tom Rini <trini@konsulko.com>
Alexander Graf [Thu, 17 Nov 2016 17:31:05 +0000 (18:31 +0100)]
tests: Add efi_loader hello world test
Now that we have working network tests and a hello world efi application
built inside our tree, we can automatically test that efi binary running
inside of U-Boot.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Alexander Graf [Thu, 17 Nov 2016 17:31:04 +0000 (18:31 +0100)]
travis: Add python path for environments
When running in travis-ci, we want to pass environment configuration to
the tests. These reside in a path available through PYTHONPATH, so let's
define that one to point to the unit test repo.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Tom Rini <trini@konsulko.com>
Alexander Graf [Thu, 17 Nov 2016 17:31:03 +0000 (18:31 +0100)]
Travis: Expose build dir as variable
Some travis QEMU tests can transfer files between the build directory
and the guest U-Boot instance. For that to work, both need to have access
to the same directory.
This patch puts the current build path into an environment variable, so
that the environment generating python scripts can extract it from there
and read the respective files.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Tom Rini <trini@konsulko.com>
Alexander Graf [Thu, 17 Nov 2016 17:31:02 +0000 (18:31 +0100)]
tests: net: Offset downloads to 4MB
The network test currently downloads files at 0MB offset of RAM start.
This works for most ARM systems, but x86 has weird memory layout constraints
on the first MB of RAM.
To not get caught into any of these, let's add a 4MB pad from start
of RAM to the default memory offset.
Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sun, 13 Nov 2016 21:24:54 +0000 (14:24 -0700)]
rockchip: Add support for veyron-minnie (ASUS Chromebook Flip)
This adds support for the Asus Chromebook Flip, an RK3288-based clamshell
device which can flip into 'tablet' mode. The device tree file comes from
Linux v4.8. The SDRAM parameters are for 4GB Samsung LPDDR3.
Simon Glass [Sun, 13 Nov 2016 21:22:16 +0000 (14:22 -0700)]
rockchip: Add support for veyron-mickey (Chromebit)
This adds support for the Asus Chromebit, and RK3288-based device designed
to plug directly into an HDMI monitor. The device tree file comes from
Linux v4.8.
Simon Glass [Sun, 13 Nov 2016 21:22:15 +0000 (14:22 -0700)]
rockchip: video: Avoid using u8 in the HDMI driver
It makes not sense using u8 to hold a value on a 32-bit or 64-bit machine.
It can only bloat the code by forcing the compiler to mask the value.
Change it to uint.
Simon Glass [Sun, 13 Nov 2016 21:22:14 +0000 (14:22 -0700)]
rockchip: veyron: Adjust ARM clock after relocation
Update board_init() to increase the ARM clock to the maximum speed on
veyron boards. This makes quite a large difference in performance. With
this change, speed goes from about 750 DMIPS to 2720 DMIPs.
Simon Glass [Sun, 13 Nov 2016 21:22:13 +0000 (14:22 -0700)]
rockchip: clk: Support setting ACLK
Add basic support for setting the ARM clock, since this allows us to run
at maximum speed in U-Boot. Currently only a single speed is supported
(1.8GHz).
Simon Glass [Sun, 13 Nov 2016 21:22:10 +0000 (14:22 -0700)]
rockchip: Rename jerry files to veyron
At present we have a single rk3288-based Chromebook: chromebook_jerry. But
all such Chromebooks can use the same binary with only device-tree
differences. The family name is 'veyron', so rename the files accordingly.
Also update the device-tree filename since this currently differs from
Linux.
Simon Glass [Sun, 13 Nov 2016 21:22:00 +0000 (14:22 -0700)]
stdio: Correct numbering logic in stdio_probe_device()
The current code assumes that the devices are ordered corresponding to
their alias value. But (for example) video1 can come before video0 in the
device tree.
Correct this, by always looking for device 0 first. After that we can fall
back to finding the first available device.
Keerthy [Wed, 26 Oct 2016 08:12:30 +0000 (13:42 +0530)]
power: regulator: Introduce regulator_set_value_force function
In case we want to force a particular value on a regulator
irrespective of the min/max constraints for testing purposes
one can call regulator_set_value_force function.
Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
York Sun [Wed, 23 Nov 2016 17:25:09 +0000 (09:25 -0800)]
image-fit: Fix compiling error caused by autoconf.h
Commit ec6617c3 includes autoconf.h in image-fit.c, causing conflict
for board odroid-xu3 which overwrites CONFIG_SYS_BOARD in header
file. Move the include higher and use linux/kconfig.h instead of
generated/autoconf.h.
Signed-off-by: York Sun <york.sun@nxp.com> CC: Alison Wang <alison.wang@nxp.com>
York Sun [Wed, 23 Nov 2016 17:08:47 +0000 (09:08 -0800)]
armv7: ls1021aiot: Fixing SPL compiling issues
To align with SPL change 38fed8ab and 693d4c9f, add Kconfig option
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR to defconfig, and remove
CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS.
Signed-off-by: York Sun <york.sun@nxp.com> CC: Feng Li <feng.li_2@nxp.com>
Alison Wang [Thu, 10 Nov 2016 02:49:05 +0000 (10:49 +0800)]
armv8: fsl-layerscape: Support loading 32-bit OS with PSCI enabled
As PSCI and secure monitor firmware framework are enabled, this patch is
to support loading 32-bit OS in such case. The default target exception
level returned to U-Boot is EL2, so the corresponding work to switch to
AArch32 EL2 and jump to 32-bit OS are done in U-Boot and secure firmware
together.
Signed-off-by: Alison Wang <alison.wang@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Alison Wang [Thu, 10 Nov 2016 02:49:04 +0000 (10:49 +0800)]
armv8: fsl-layerscape: SMP support for loading 32-bit OS
Spin-table method is used for secondary cores to load 32-bit OS. The
architecture information will be got through checking FIT image and
saved in the os_arch element of spin-table, then the secondary cores
will check os_arch and jump to 32-bit OS or 64-bit OS automatically.
Signed-off-by: Alison Wang <alison.wang@nxp.com> Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Thomas Abraham [Wed, 16 Nov 2016 13:19:16 +0000 (18:49 +0530)]
arm: exynos7420: remove custome low level init function
Remove the custom low-level initialization function and reuse the
default low-level initialization function. But this requires the
ARMV8_MULTIENTRY config option to be enabled for Exynos7420.
On Exynos7420, the boot CPU belongs to the second cluster and so
with ARMV8_MULTIENTRY config option enabled, the 'branch_if_master'
macro fails to detect the CPU as boot CPU. As a temporary workaround
the CPU_RELEASE_ADDR is set to point to '_main'.
Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Alison Wang <alison.wang@nxp.com> Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Reviewed-by: Alison Wang <alison.wang@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Priyanka Jain [Thu, 17 Nov 2016 06:59:53 +0000 (12:29 +0530)]
armv8: fsl-layerscape: Update TZASC registers type
TZASC registers like TZASC_GATE_KEEPER, TZASC_REGION_ATTRIBUTES
are 32-bit regsiters.
So while doing register load-store operations, 32-bit intermediate
register, w0 should be used.
Update x0 register to w0 register type.
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Radu Bacrau [Tue, 22 Nov 2016 00:27:19 +0000 (18:27 -0600)]
sf: Add support for MX66U51235F, MX66L1G45G, MT25QU02G, MT25QL02G
This commit adds support for the Macronix MX66U51235F,
MX66L1G45G and Micron MT25QU02G, MT25QL02G flash parts.
Signed-off-by: Radu Bacrau <dumitru.bacrau@intel.com> Cc: Chin Liang See <clsee@altera.com> Cc: Radu Bacrau <radu.bacrau@gmail.com>
[Update proper commit header and 80-line cut on body] Reviewed-by: Jagan Teki <jagan@openedev.com>
Tom Rini [Mon, 21 Nov 2016 19:07:58 +0000 (14:07 -0500)]
am57xx: Remove unused variable warnings
Starting with the changes to fix USB host on am57xx/am43xx we stopped
using usb_otg_ss1/related stuff and but we hadn't been enabling the
relevant options to cause the warnings until just recently.
Fixes: 55efadde7ede (ARM: AM57xx: AM43xx: Fix USB host) Fixes: a48d687c575f (configs: am57xx: Enable download gadget) Signed-off-by: Tom Rini <trini@konsulko.com>
Yann E. MORIN [Sun, 13 Nov 2016 21:26:13 +0000 (22:26 +0100)]
fastboot: simplify the Kconfig logic
Currently, the fastboot item in menuconfig is a comment followed by a
boolean option withan empty prompt, followed by a menu:
*** FASTBOOT ***
[*]
Fastboot support --->
This is not "nice-looking" at all...
Change the logic to make the boolean option a "menuconfig" rather than a
mere "config", so that all dependent options gets groupped under a menu.
The layout is now:
*** FASTBOOT ***
[*] Fastboot support --->
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
Adam Ford [Sun, 13 Nov 2016 04:02:37 +0000 (22:02 -0600)]
ARM: OMAP3_LOGIC: Update MTD Partition Table
The previous partition table did not support a separate device tree
and the kernel size was limited to 4MB. This update shows the
location of the device tree (labeled as spl-os) for those who
want to use Falcon Mode or use U-Boot to store the Flattened
Device Tree (FDT) to NAND without appending it to the kernel.
This also grows the kernel to 6MB since 4MB was becomming tight
Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
Adam Ford [Sun, 13 Nov 2016 03:43:37 +0000 (21:43 -0600)]
ARM: OMAP3_LOGIC: Fix SPL Memory Map for Falcon Mode
The memory map defined in commit ("49c7303f0e52: OMAP3: Enable SPL
on omap3_logic) was used by a copy-paste of another board without
fully understanding how the map works in Falcon mode. This patch
undoes the customization and uses the default SPL Memory Map
for OMAP3.
When building the uImage, set LOADADDR=0x82000000 and Falcon
mode should properly load.
Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
Cédric Schieli [Fri, 11 Nov 2016 10:59:07 +0000 (11:59 +0100)]
rpi: passthrough of the firmware provided FDT blob
Raspberry firmware used to pass a FDT blob at a fixed address (0x100),
but this is not true anymore. The address now depends on both the
memory size and the blob size [1].
If one wants to passthrough this FDT blob to the kernel, the most
reliable way is to save its address from the r2/x0 register in the
U-Boot entry point and expose it in a environment variable for
further processing.
This patch just does this:
- save the provided address in the global variable fw_dtb_pointer
- expose it in ${fdt_addr} if it points to a a valid FDT blob
There are many different ways to use it. One can, for example, use
the following script which will extract from the tree the command
line built by the firmware, then hand over the blob to a previously
loaded kernel:
fdt addr ${fdt_addr}
fdt get value bootargs /chosen bootargs
bootz ${kernel_addr_r} - ${fdt_addr}
Alternatively, users relying on sysboot/pxe can simply omit any FDT
statement in their extlinux.conf file, U-Boot will automagically pick
${fdt_addr} and pass it to the kernel.
projects / u-boot / log