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The /config node (Configuration Options)
----------------------------------------
A number of run-time configuration options are provided in the /config node
of the control device tree. You can access these using fdtdec_get_config_int(),
fdtdec_get_config_bool() and fdtdec_get_config_string().
These options are designed to affect the operation of U-Boot at runtime.
Runtime-configuration items can help avoid proliferation of different builds
with only minor changes, e.g. enabling and disabling console output. Items
here should be those that can usefully be set by the build system after U-Boot
is built.
Available options are:
u-boot,efi-partition-entries-offset (int)
If present, this provides an offset (in bytes, from the start of a
device) that should be skipped over before the partition entries.
This is used by the EFI/GPT partition implementation when a device
is formatted.
This setting will override any values configured via Kconfig.
u-boot,mmc-env-offset (int)
u-boot,mmc-env-offset-redundant (int)
If present, the values of the 'u-boot,mmc-env-offset' and/or
of the u-boot,mmc-env-offset-redundant' properties overrides
CONFIG_ENV_OFFSET and CONFIG_ENV_OFFSET_REDUND, respectively,
for SD/MMC devices.
Values are interpreted as the offset from the start of the
device, specified in bytes. It is assumed that the setting
will point at the beginning of a LBA and values that are not
LBA-aligned will be rounded up to the next LBA address.
u-boot,mmc-env-partition (int)
if present, the environment shall be placed at the last
CONFIG_ENV_SIZE blocks of the partition on the
CONFIG_SYS_MMC_ENV_DEV.
if u-boot,mmc-env-offset* is present, this setting will take
precedence. In that case, only if the partition is not found,
mmc-env-offset* will be tried.
u-boot,no-keyboard (bool)
Tells U-Boot not to expect an attached keyboard with a VGA console.
silent-console (int)
If present and non-zero, the console is silenced by default on boot.
u-boot,spl-payload-offset (int)
If present (and SPL is controlled by the device-tree), this allows
to override the CONFIG_SYS_SPI_U_BOOT_OFFS setting using a value
from the device-tree.
sysreset-gpio (string)
If present (and supported by the specific board), indicates a
GPIO that can be set to trigger a system reset. It is assumed
that such a system reset will effect a complete platform reset,
being roughly equivalent to a power-on reset.
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