[U-Boot] [u-boot-release] [Patch v3 7/7] powerpc/8xxx: Add support for interactive DDR programming interface

[Timur Tabi <timur@freescale.com>]

York Sun wrote:
> +Interactive DDR debugging
> +===========================
> +
> +For DDR parameter tuning up and debugging, the interactive DDR debugging can
> +be activated by saving an environment variable "ddr_interactive". The value
> +doesn't matter. Once activated, U-boot prompts "FSL DDR>" before enabling DDR
> +controller. The available commands can be seen by typing "help".
> +
> +The example flow of using interactive debugging is
> +type command "compute" to calculate the parameters from the default
> +type command "print" with arguments to show SPD, options, registers
> +type command "edit" with arguments to change any if desired
> +type command "go" to continue calculation and enable DDR controller
> +
> +Note, check "next_step" to show the flow. For example, after editing registers,
> +DDR controller will be enabled with current setting without further
> +calculation.

This is pretty skimpy for such a powerful feature.  How about some examples and
a detailed description of each command?

-- 
Timur Tabi
Linux kernel developer at Freescale