MIPS: BCM63XX: add RNG driver platform_device stub

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: mpm@selenic.com
Cc: herbert@gondor.apana.org.au
Patchwork: https://patchwork.linux-mips.org/patch/3325/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 42 insertions, 2 deletions

diff --git a/arch/mips/bcm63xx/Makefile b/arch/mips/bcm63xx/Makefile
index 4049cd51fd15..349b2061d2ec 100644
--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,6 +1,6 @@
 obj-y           += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
-                   dev-dsp.o dev-enet.o dev-pcmcia.o dev-spi.o dev-uart.o \
-                   dev-wdt.o
+                   dev-dsp.o dev-enet.o dev-pcmcia.o dev-rng.o dev-spi.o \
+                   dev-uart.o dev-wdt.o
 obj-$(CONFIG_EARLY_PRINTK)      += early_printk.o
 
 obj-y           += boards/
diff --git a/arch/mips/bcm63xx/dev-rng.c b/arch/mips/bcm63xx/dev-rng.c
new file mode 100644
index 000000000000..d277b4dc6c68
--- /dev/null
+++ b/arch/mips/bcm63xx/dev-rng.c
@@ -0,0 +1,40 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2011 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <bcm63xx_cpu.h>
+
+static struct resource rng_resources[] = {
+        {
+                .start          = -1, /* filled at runtime */
+                .end            = -1, /* filled at runtime */
+                .flags          = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device bcm63xx_rng_device = {
+        .name           = "bcm63xx-rng",
+        .id             = -1,
+        .num_resources  = ARRAY_SIZE(rng_resources),
+        .resource       = rng_resources,
+};
+
+int __init bcm63xx_rng_register(void)
+{
+        if (!BCMCPU_IS_6368())
+                return -ENODEV;
+
+        rng_resources[0].start = bcm63xx_regset_address(RSET_RNG);
+        rng_resources[0].end = rng_resources[0].start;
+        rng_resources[0].end += RSET_RNG_SIZE - 1;
+
+        return platform_device_register(&bcm63xx_rng_device);
+}
+arch_initcall(bcm63xx_rng_register);