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
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