such as ARM architectural timer initialization.
- Linux Kernel Interface:
- CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only]
-
- When transferring memsize parameter to Linux, some versions
- expect it to be in bytes, others in MB.
- Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.
-
CONFIG_OF_LIBFDT
New kernel versions are expecting firmware settings to be
to 0 disables calling WATCHDOG_RESET() from the timer
interrupt.
-- Real-Time Clock:
-
- When CONFIG_CMD_DATE is selected, the type of the RTC
- has to be selected, too. Define exactly one of the
- following options:
-
- CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC
- CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC
- CONFIG_RTC_MC146818 - use MC146818 RTC
- CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC
- CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC
- CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC
- CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC
- CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC
- CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC
- CONFIG_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337
- CONFIG_SYS_RV3029_TCR - enable trickle charger on
- RV3029 RTC.
-
- Note that if the RTC uses I2C, then the I2C interface
- must also be configured. See I2C Support, below.
-
- GPIO Support:
- CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO
-
The CFG_SYS_I2C_PCA953X_WIDTH option specifies a list of
chip-ngpio pairs that tell the PCA953X driver the number of
pins supported by a particular chip.
Support for generic parallel port TPM devices. Only one device
per system is supported at this time.
- CONFIG_TPM_TIS_BASE_ADDRESS
- Base address where the generic TPM device is mapped
- to. Contemporary x86 systems usually map it at
- 0xfed40000.
-
CONFIG_TPM
Define this to enable the TPM support library which provides
functional interfaces to some TPM commands.
variable usbtty to be cdc_acm should suffice. The following
might be defined in YourBoardName.h
- CONFIG_USB_DEVICE
- Define this to build a UDC device
-
- CONFIG_USB_TTY
- Define this to have a tty type of device available to
- talk to the UDC device
-
CONFIG_USBD_HS
Define this to enable the high speed support for usb
device and usbtty. If this feature is enabled, a routine
Some PHY like Intel LXT971A need extra delay after
command issued before MII status register can be read
-- IP address:
- CONFIG_IPADDR
-
- Define a default value for the IP address to use for
- the default Ethernet interface, in case this is not
- determined through e.g. bootp.
- (Environment variable "ipaddr")
-
-- Server IP address:
- CONFIG_SERVERIP
-
- Defines a default value for the IP address of a TFTP
- server to contact when using the "tftboot" command.
- (Environment variable "serverip")
-
-- Gateway IP address:
- CONFIG_GATEWAYIP
-
- Defines a default value for the IP address of the
- default router where packets to other networks are
- sent to.
- (Environment variable "gatewayip")
-
-- Subnet mask:
- CONFIG_NETMASK
-
- Defines a default value for the subnet mask (or
- routing prefix) which is used to determine if an IP
- address belongs to the local subnet or needs to be
- forwarded through a router.
- (Environment variable "netmask")
-
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
CFG_SYS_I2C_NOPROBES
This option specifies a list of I2C devices that will be skipped
- when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS
- is set, specify a list of bus-device pairs. Otherwise, specify
- a 1D array of device addresses
+ when the 'i2c probe' command is issued.
e.g.
- #undef CONFIG_I2C_MULTI_BUS
#define CFG_SYS_I2C_NOPROBES {0x50,0x68}
will skip addresses 0x50 and 0x68 on a board with one I2C bus
- #define CONFIG_I2C_MULTI_BUS
- #define CFG_SYS_I2C_NOPROBES {{0,0x50},{0,0x68},{1,0x54}}
-
- will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
-
CFG_SYS_RTC_BUS_NUM
If defined, then this indicates the I2C bus number for the RTC.
- CONFIG_SYS_FLASH_USE_BUFFER_WRITE
Use buffered writes to flash.
-- CONFIG_FLASH_SPANSION_S29WS_N
- s29ws-n MirrorBit flash has non-standard addresses for buffered
- write commands.
-
-- CONFIG_FLASH_SHOW_PROGRESS
- If defined (must be an integer), print out countdown
- digits and dots. Recommended value: 45 (9..1) for 80
- column displays, 15 (3..1) for 40 column displays.
-
-- CONFIG_FLASH_VERIFY
- If defined, the content of the flash (destination) is compared
- against the source after the write operation. An error message
- will be printed when the contents are not identical.
- Please note that this option is useless in nearly all cases,
- since such flash programming errors usually are detected earlier
- while unprotecting/erasing/programming. Please only enable
- this option if you really know what you are doing.
-
- CONFIG_ENV_FLAGS_LIST_DEFAULT
- CONFIG_ENV_FLAGS_LIST_STATIC
Enable validation of the values given to environment variables when
of environment data (variable area); in general, we support the
following configurations:
-- CONFIG_BUILD_ENVCRC:
-
- Builds up envcrc with the target environment so that external utils
- may easily extract it and embed it in final U-Boot images.
-
BE CAREFUL! The first access to the environment happens quite early
in U-Boot initialization (when we try to get the setting of for the
console baudrate). You *MUST* have mapped your NVRAM area then, or
Sets the EBC0_CFG register for the NDFC. If not defined
a default value will be used.
-- CONFIG_SPD_EEPROM
- Get DDR timing information from an I2C EEPROM. Common
- with pluggable memory modules such as SODIMMs
-
- SPD_EEPROM_ADDRESS
- I2C address of the SPD EEPROM
-
- CONFIG_SYS_SPD_BUS_NUM
If SPD EEPROM is on an I2C bus other than the first
one, specify here. Note that the value must resolve
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