1Broadcom TRX Container Partition 2================================ 3 4TRX is Broadcom's official firmware format for the BCM947xx boards. It's used by 5most of the vendors building devices based on Broadcom's BCM47xx SoCs and is 6supported by the CFE bootloader. 7 8Design of the TRX format is very minimalistic. Its header contains 9identification fields, CRC32 checksum and the locations of embedded partitions. 10Its purpose is to store a few partitions in a format that can be distributed as 11a standalone file and written in a flash memory. 12 13Container can hold up to 4 partitions. The first partition has to contain a 14device executable binary (e.g. a kernel) as it's what the CFE bootloader starts 15executing. Other partitions can be used for operating system purposes. This is 16useful for systems that keep kernel and rootfs separated. 17 18TRX doesn't enforce any strict partition boundaries or size limits. All 19partitions have to be less than the 4GiB max size limit. 20 21There are two existing/known TRX variants: 221) v1 which contains 3 partitions 232) v2 which contains 4 partitions 24 25There aren't separated compatible bindings for them as version can be trivialy 26detected by a software parsing TRX header. 27 28Required properties: 29- compatible : (required) must be "brcm,trx" 30 31Optional properties: 32 33- brcm,trx-magic: TRX magic, if it is different from the default magic 34 0x30524448 as a u32. 35 36Example: 37 38flash@0 { 39 partitions { 40 compatible = "brcm,trx"; 41 }; 42}; 43