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>
19 static int pseries_get_random_long(unsigned long *v
)
21 unsigned long retbuf
[PLPAR_HCALL_BUFSIZE
];
23 if (plpar_hcall(H_RANDOM
, retbuf
) == H_SUCCESS
) {
31 static __init
int rng_init(void)
33 struct device_node
*dn
;
35 dn
= of_find_compatible_node(NULL
, NULL
, "ibm,random");
39 pr_info("Registering arch random hook.\n");
41 ppc_md
.get_random_long
= pseries_get_random_long
;
45 subsys_initcall(rng_init
);