u-boot-2019.07 移植步骤

doc/README.kconfig

Tips to add/remove boards
-------------------------

When adding a new board, the following steps are generally needed:

[1] Add a header file include/configs/<target>.h
 [2] Make sure to define necessary CONFIG_SYS_* in Kconfig:
       Define CONFIG_SYS_CPU="cpu" to compile arch/<arch>/cpu/<cpu>
       Define CONFIG_SYS_SOC="soc" to compile arch/<arch>/cpu/<cpu>/<soc>
       Define CONFIG_SYS_VENDOR="vendor" to compile board/<vendor>/common/*
         and board/<vendor>/<board>/*
       Define CONFIG_SYS_BOARD="board" to compile board/<board>/*
         (or board/<vendor>/<board>/* if CONFIG_SYS_VENDOR is defined)
       Define CONFIG_SYS_CONFIG_NAME="target" to include
         include/configs/<target>.h
 [3] Add a new entry to the board select menu in Kconfig.
     The board select menu is located in arch/<arch>/Kconfig or
     arch/<arch>/*/Kconfig.
 [4] Add a MAINTAINERS file
     It is generally placed at board/<board>/MAINTAINERS or
     board/<vendor>/<board>/MAINTAINERS
 [5] Add configs/<target>_defconfig

When removing an obsolete board, the following steps are generally needed:

[1] Remove configs/<target>_defconfig
 [2] Remove include/configs/<target>.h if it is not used by any other boards
 [3] Remove board/<vendor>/<board>/* or board/<board>/* if it is not used
     by any other boards
 [4] Update MAINTAINERS if necessary
 [5] Remove the unused entry from the board select menu in Kconfig
 [6] Add an entry to doc/README.scrapyard

以Kconfig为主线

1. /u-boot-2019.07/arch/arm/Kconfig

config ARCH_FMXXQL
    bool "fmxx ql"
    select CPU_V7A

endchoice

source "arch/arm/mach-fmxx/Kconfig"
source "arch/arm/mach-fmxx/ql/Kconfig"

Define CONFIG_SYS_CPU="cpu" to compile arch/<arch>/cpu/<cpu>

arch/arm/cpu/armv7

2.arch/arm/mach-fmxx/Kconfig

空着

3. arch/arm/mach-fmxx/ql/Kconfig

if ARCH_FMXXQL

choice
    prompt "fmxx ql board select"
    default TARGET_QL10_DEMO

config TARGET_QL10_DEMO
    bool "fmxx ql10 demo"

endchoice

config SYS_SOC
    default "fmxxql"

source "board/fmxx/ql10_demo/Kconfig"

endif

Define CONFIG_SYS_SOC="soc" to compile arch/<arch>/cpu/<cpu>/<soc>

arch/arm/cpu/armv7/fmxxql 我们并没有这个文件夹

4.board/fmxx/ql10_demo/Kconfig

if TARGET_QL10_DEMO

config SYS_BOARD
    default "ql10_demo"

config SYS_VENDOR
    default "fmxx"

config SYS_CONFIG_NAME
    default "ql10_demo"

endif

Define CONFIG_SYS_VENDOR="vendor" to compile board/<vendor>/common/*
         and board/<vendor>/<board>/*

Define CONFIG_SYS_BOARD="board" to compile board/<board>/*
         (or board/<vendor>/<board>/* if CONFIG_SYS_VENDOR is defined)

board/fmxx/ql10_demo

Define CONFIG_SYS_CONFIG_NAME="target" to include
         include/configs/<target>.h

include/configs/ql10_demo.h

Add configs/<target>_defconfig

configs/ql10_demo_defconfig