delay in the IMXCFG file

Sascha Hauer s.hauer at
Wed Aug 19 07:04:43 PDT 2015

Hi Igor,

On Wed, Aug 19, 2015 at 11:48:41AM +0300, Igor Plyatov wrote:
> Dear all,
> for debugging purposes I need to add some delays into the <BOARD
> NAME>.imxcfg file, but does not know which format it is. It looks
> like some kind of C, but it is confusing.
> Where is defined "wm 32", "soc", "dcdofs", "loadaddr" command and others?

They are interpreted in the imx-image tool, see scripts/imx/README and
scripts/imx/imx-image.c. The imx-image tool converts the commands into a
dcd table which is understood by the Freescale i.MX ROM Code. The ROM
code does not provide a delay command, so what you are looking for does
not exist. All the is is a nop command. This is currently not
implemented in imx-image, you would have to add it.

> Which commands I can use in the IMXCFG file to create very early
> delay, before initialization of DRAM?

As said, there is nop. Otherwise there is a 'check' command to poll for
setting/clearing bits.
See the i.MX reference manual in the "Device Configuration Data (DCD)"
section for further information.


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