mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2025-07-25 06:07:18 +00:00
Add new mtdsplit parser "mstc-boot" for the devices manufactured by MSTC (Mitra Star Technology Corp.). This is necessary to handle dual-boot on those devices. This parser splits kernel+rootfs or only rootfs(or UBI) based on the image in the firmware partition or pre-defined partitions in dts, and "bootnum" value in the "persist" (or "working") partition. Note: "bootnum" is used for switching active firmware partitions on the devices manufactured by MSTC and '1' or '2' are used on most devices. But some devices use '0' or '1'. (example: I-O DATA WN-DEAX1800GR) Sequence: 1. obtain "bootnum" value 2. child nodes exsist (regardless of bootnum) -> fixed partitions (active parts : without bootnum (ex.: "kernel", "rootfs") inactive parts: with bootnum (ex.: "kernel2", "rootfs2")) 3. current partition is active (dt bootnum == mtd bootnum) -> image-based partitions Device Tree: - common - mstc,bootnum : "bootnum" value for the mtd partition (0/1/2) - mstc,persist : phandle of "persist" partition containing "bootnum" value - fixed partitions - #address-cells: indicate cell count of address of child nodes (1) - #size-cells : indicate cell count of size of child nodes (1) - (child nodes) : define the child partitions - reg : define the offset and size - label-base : define the base name of the partition - (example) : base:"kernel"->"kernel"(active)/"kernel2"(inactive) example: partition@3c0000 { compatible = "mstc,boot"; reg = <0x3c0000 0x3240000>; label = "firmware1"; mstc,bootnum = <1>; mstc,persist = <&mtd_persist>; #address-cells = <1>; #size-cells = <1>; partition@0 { reg = <0x0 0x800000>; label-base = "kernel"; }; partition@800000 { reg = <0x800000 0x2a40000>; label-base = "ubi"; }; }; - image-based partitions (no additional properties) example: partition@5a0000 { compatible = "mstc,boot"; label = "firmware1"; reg = <0x5a0000 0x3200000>; mstc,bootnum = <1>; mstc,persist = <&mtd_persist>; }; Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com> Link: https://github.com/openwrt/openwrt/pull/18976 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>