[U-Boot] [PATCH v2] nios2: add README.nios2

[Marek Vasut <marex@denx.de>]

On Tuesday, October 20, 2015 at 03:48:46 AM, Thomas Chou wrote:
> Add README.nios2 about how to add nios2 boards to u-boot.
> 
> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
> ---
> v2
>   add ref and fix words as suggested by Marek.
> 
>  doc/README.nios2 | 97
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed,
> 97 insertions(+)
>  create mode 100644 doc/README.nios2
> 
> diff --git a/doc/README.nios2 b/doc/README.nios2
> new file mode 100644
> index 0000000..453c7c7
> --- /dev/null
> +++ b/doc/README.nios2
> @@ -0,0 +1,97 @@
> +Nios II is a 32-bit embedded-processor architecture designed
> +specifically for the Altera family of FPGAs.
> +
> +Please refer to the link for more information on Nios II,
> +https://www.altera.com/products/processors/overview.html
> +
> +Please refer to the link for Linux port and toolchains,
> +http://rocketboards.org/foswiki/view/Documentation/NiosIILinuxUserManual
> +
> +The Nios II port of u-boot is controlled by device tree. Please check
> +out doc/README.fdt-control.
> +
> +To add a new board/configuration (eg, mysystem) to u-boot, you will need
> +three files.
> +
> +1. The device tree source which describes the hardware, dts file.
> +    arch/nios2/dts/mysystem.dts
> +
> +2. Default configuration of Kconfig, defconfig file.
> +    configs/mysystem_defconfig
> +
> +3. The legacy board header file.
> +    include/configs/mysystem.h
> +
> +The device tree source must be generated from your qsys/sopc design
> +using the sopc2dts tool. Then modified to fit your configuration. Please
> +find the sopc2dts download and usage at the wiki,
> +http://www.alterawiki.com/wiki/Sopc2dts
> +
> +java -jar sopc2dts.jar --force-altr -i mysystem.sopcinfo -o mysystem.dts

Just a hint -- in case you're listing a command, add a dollar sign before
it to be explicit it's a command, like this:

$ java -jar ...

Otherwise,

Acked-by: Marek Vasut <marex@denx.de>

Best regards,
Marek Vasut