[LEDE-DEV] Nand flash partitions

[Hauke Mehrtens]

Hi Daniel,

I work on creating an OpenWrt image which I can just flash over an UGW
(Lantiq's/Intel's OpenWrt distribution) distribution with the normal
U-Boot. Then you do not have to touch the bootloader or the flash layout
and can just run OpenWrt. UGW is mostly focused on NAND flash based
devices. The partition layout for one device is shown in [0], the size
of the system_sw partition differs depending on the nand flash size and
contains an UBI layer. A partition ending with A or B means there are
two versions and when we upgrade only one is replaced and the other is
used for a backup. U-Boot says which partition to use with some kernel
command line parameters.

The UBI layer contains a kernelA, kernelB, rootfsA, rootfsB, firmwareA,
firmwareB and data_vol partition.

Can I change your UBI patches in a way that they accept a name for the
rootfs partition from the kernel command line? Are you planing to
upstream them or can I try?

Hauke


[0] UGW partition setup:

partition at 0 {
	label = "uboot";
	reg = <0x00000 0x100000>; /* 1024 KB */
};

partition at 100000 {
	label = "uboot_env";
	reg = <0x100000 0x40000>; /* 256 KB */
};

partition at 140000 {
	label = "ubootconfigB";
	reg = <0x140000 0x40000>; /* 256 KB */
};

partition at 180000 {
	label = "gphyfirmware";
	reg = <0x180000 0x40000>; /* 256 KB */
};

partition at 1c0000 {
	label = "system_sw";
	reg = <0x1c0000 0xc800000>;
};

partition at c9c0000 {
	label = "calibration";
	reg = <0xc9c0000 0x100000>;
};

partition at cac0000 {
	label = "res";
	reg = <0xcac0000 0x13540000>;
};