2 * Copyright 2013, Michael Ellerman, IBM Corporation.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 #define pr_fmt(fmt) "pseries-rng: " fmt
12 #include <linux/kernel.h>
14 #include <asm/archrandom.h>
15 #include <asm/machdep.h>
16 #include <asm/plpar_wrappers.h>
20 static int pseries_get_random_long(unsigned long *v)
22 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
24 if (plpar_hcall(H_RANDOM, retbuf) == H_SUCCESS) {
32 void __init pseries_rng_init(void)
34 struct device_node *dn;
36 dn = of_find_compatible_node(NULL, NULL, "ibm,random");
39 ppc_md.get_random_seed = pseries_get_random_long;