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upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/doc/README.uniphier

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U-Boot for UniPhier SoC family
==============================


Tested toolchains
-----------------

 (a) Ubuntu packages  (CROSS_COMPILE=arm-linux-gnueabi-)

  If you are building U-Boot on Ubuntu, its standard package is recommended.
  You can install it as follows:

    $ sudo apt-get install gcc-arm-linux-gnueabi-

 (b) Linaro compilers  (CROSS_COMPILE=arm-linux-gnueabihf-)

  You can download pre-built toolchains from:

    http://www.linaro.org/downloads/

 (c) kernel.org compilers  (CROSS_COMPILE=arm-unknown-linux-gnueabi-)

  You can download pre-built toolchains from:

    ftp://www.kernel.org/pub/tools/crosstool/files/bin/


Compile the source
------------------

PH1-Pro4:
    $ make ph1_pro4_defconfig
    $ make CROSS_COMPILE=arm-linux-gnueabi-

PH1-LD4:
    $ make ph1_ld4_defconfig
    $ make CROSS_COMPILE=arm-linux-gnueabi-

PH1-sLD8:
    $ make ph1_sld8_defconfig
    $ make CROSS_COMPILE=arm-linux-gnueabi-

You may wish to change the "CROSS_COMPILE=arm-linux-gnueabi-"
to use your favorite compiler.


Burn U-Boot images to NAND
--------------------------

Write two files to the NAND device as follows:
 - spl/u-boot-spl.bin at the offset address 0x00000000
 - u-boot-dtb.img     at the offset address 0x00010000

If a TFTP server is available, the images can be easily updated.
Just copy the u-boot-spl.bin and u-boot-dtb.img to the TFTP public directory,
and then run the following command at the U-Boot command line:

  => run nandupdate


UniPhier specific commands
--------------------------

 - pinmon (enabled by CONFIG_CMD_PINMON)
     shows the boot mode pins that has been latched at the power-on reset

 - ddrphy (enabled by CONFIG_CMD_DDRPHY_DUMP)
     shows the DDR PHY parameters set by the PHY training


Supported devices
-----------------

 - UART (on-chip)
 - NAND
 - USB (2.0)
 - LAN (on-board SMSC9118)
 - I2C
 - EEPROM (connected to the on-board I2C bus)
 - Support card (SRAM, NOR flash, some peripherals)


--
Masahiro Yamada <yamada.m@jp.panasonic.com>
Feb. 2015