论dts --- linux kernel 实现欣赏

void __init early_init_dt_scan_nodes(void)
{
	int rc = 0;

	/* Initialize {size,address}-cells info */
	of_scan_flat_dt(early_init_dt_scan_root, NULL);

	/* Retrieve various information from the /chosen node */
	rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
	if (!rc)
		pr_warn("No chosen node found, continuing without\n");

	/* Setup memory, calling early_init_dt_add_memory_arch */
	of_scan_flat_dt(early_init_dt_scan_memory, NULL);

	/* Handle linux,usable-memory-range property */
	early_init_dt_check_for_usable_mem_range();
}