1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
4  */
5 #include <linux/init.h>
6 #include <linux/libfdt.h>
7 #include <linux/pgtable.h>
8 #include <asm/soc.h>
9 
10 /*
11  * This is called extremly early, before parse_dtb(), to allow initializing
12  * SoC hardware before memory or any device driver initialization.
13  */
soc_early_init(void)14 void __init soc_early_init(void)
15 {
16 	void (*early_fn)(const void *fdt);
17 	const struct of_device_id *s;
18 	const void *fdt = dtb_early_va;
19 
20 	for (s = (void *)&__soc_early_init_table_start;
21 	     (void *)s < (void *)&__soc_early_init_table_end; s++) {
22 		if (!fdt_node_check_compatible(fdt, 0, s->compatible)) {
23 			early_fn = s->data;
24 			early_fn(fdt);
25 			return;
26 		}
27 	}
28 }
29