1 Managing the device tree data in U-Boot
2 =======================================
4 The 'fdt' command can be used to manipulate the device tree (DT) data
5 that is passed from U-Boot to Linux.
7 - 'fdt boardsetup' will trim out some device nodes according to
10 Environment setting removed nodes
11 ---------------------------------------------
13 otg_mode=device usbotg
14 otg_mode=<UNSET> <both of the above> + usbphy
16 touchpanel=edt-ft5x06 ti,tsc2007
17 touchpanel=tsc2007 edt,edt-ft5x06
18 touchpanel=<UNSET> <both of the above>
20 Note: This command is automatically executed when booting Linux via
23 - 'fdt rm' and 'fdt add' can be used to remove/create additional nodes.
25 The whole DT data can be saved to and reloaded from the flash partition
26 'dtb' (or any other partition):
28 nand write.jffs2 ${fdtaddr} dtb ${fdtsize}
30 If a DT is loaded from flash which should not be further manipulated
31 upon booting Linux, the string 'fdt boardsetup;' should be removed
32 from the 'bootm_cmd' environment variable.
35 nand read ${fdtaddr} dtb