[U-Boot] [PATCH V3 4/5] ARM: OMAP4/5: Change the default boot command to work with device tree

[Tom Rini]

On Tue, Mar 26, 2013 at 09:57:35AM +0530, Sricharan R wrote:

> Now with kernel moving to all device tree, the default
> boot command is changed to pass the device tree blob.
> Also, adding the findfdt command to get the dt-blob
> based on the board.
[snip]
> @@ -153,7 +155,9 @@
>  	"mmcargs=setenv bootargs console=${console} " \
>  		"vram=${vram} " \
>  		"root=${mmcroot} " \
> -		"rootfstype=${mmcrootfstype}\0" \
> +		"rootfstype=${mmcrootfstype}; " \
> +		"run findfdt; " \
> +		"fatload mmc ${mmcdev} ${fdtaddr} ${fdtfile}\0" \

I missed this part before, sorry.  What we do on am335x_evm to allow
for easier overrides is:
- bootcmd runs findfdt (since we'll need it in all cases).
- Enable CONFIG_CMD_FS_GENERIC
- Add a 'loadfdt' command that can be called out ala loaduimage
- Use 'load' in loadfdt/loaduimage so that we don't care what the
  underlying filesystem type is.
- Use bootdir to help with overrides as well:
loaduimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}

So that we can easily grab from the first partition (FAT) or another
partition (ext3/4/etc).

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20130327/f8a7140e/attachment.pgp>