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authorDavid Daney <ddaney@caviumnetworks.com>2009-08-20 14:10:22 -0700
committerRalf Baechle <ralf@linux-mips.org>2009-09-17 20:07:51 +0200
commite26449153c386904d2801d6348d66d00e5ba2211 (patch)
treede1ef89387558c11c4451e2ad9c6c24e9fddeaf8 /arch/mips/cavium-octeon
parent982f6ffeeed5ef6104cfd72e517ff9e7a9270fda (diff)
MIPS: Octeon: Add hardware RNG platform device.
Add a platform device for the Octeon Random Number Generator (RNG). Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/cavium-octeon')
-rw-r--r--arch/mips/cavium-octeon/setup.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index da559249cc2f..468a1209833f 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -33,6 +33,7 @@
#include <asm/time.h>
#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-rnm-defs.h>
#ifdef CONFIG_CAVIUM_DECODE_RSL
extern void cvmx_interrupt_rsl_decode(void);
@@ -926,3 +927,45 @@ out:
return ret;
}
device_initcall(octeon_cf_device_init);
+
+/* Octeon Random Number Generator. */
+static int __init octeon_rng_device_init(void)
+{
+ struct platform_device *pd;
+ int ret = 0;
+
+ struct resource rng_resources[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ .start = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS),
+ .end = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS) + 0xf
+ }, {
+ .flags = IORESOURCE_MEM,
+ .start = cvmx_build_io_address(8, 0),
+ .end = cvmx_build_io_address(8, 0) + 0x7
+ }
+ };
+
+ pd = platform_device_alloc("octeon_rng", -1);
+ if (!pd) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = platform_device_add_resources(pd, rng_resources,
+ ARRAY_SIZE(rng_resources));
+ if (ret)
+ goto fail;
+
+ ret = platform_device_add(pd);
+ if (ret)
+ goto fail;
+
+ return ret;
+fail:
+ platform_device_put(pd);
+
+out:
+ return ret;
+}
+device_initcall(octeon_rng_device_init);