i.MX31: Add hw-random for RNGA

This hw-random driver add support to RNGA hardware found
on some i.MX processors.

Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 22 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/Kconfig b/arch/arm/mach-mx3/Kconfig
index 0e7de945ee60..32e45155089a 100644
--- a/arch/arm/mach-mx3/Kconfig
+++ b/arch/arm/mach-mx3/Kconfig
@@ -1,6 +1,7 @@
 if ARCH_MX3
 
 config ARCH_MX31
+        select ARCH_HAS_RNGA
         bool
 
 config ARCH_MX35
diff --git a/arch/arm/mach-mx3/devices.c b/arch/arm/mach-mx3/devices.c
index 380be0c9b213..227a538bb941 100644
--- a/arch/arm/mach-mx3/devices.c
+++ b/arch/arm/mach-mx3/devices.c
@@ -23,6 +23,7 @@
 #include <linux/gpio.h>
 #include <mach/hardware.h>
 #include <mach/irqs.h>
+#include <mach/common.h>
 #include <mach/imx-uart.h>
 
 #include "devices.h"
@@ -283,6 +284,21 @@ struct platform_device mxcsdhc_device1 = {
         .num_resources = ARRAY_SIZE(mxcsdhc1_resources),
         .resource = mxcsdhc1_resources,
 };
+
+static struct resource rnga_resources[] = {
+        {
+                .start = RNGA_BASE_ADDR,
+                .end = RNGA_BASE_ADDR + 0x28,
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+struct platform_device mxc_rnga_device = {
+        .name = "mxc_rnga",
+        .id = -1,
+        .num_resources = 1,
+        .resource = rnga_resources,
+};
 #endif /* CONFIG_ARCH_MX31 */
 
 /* i.MX31 Image Processing Unit */
@@ -359,6 +375,7 @@ static int mx3_devices_init(void)
         if (cpu_is_mx31()) {
                 mxc_nand_resources[0].start = MX31_NFC_BASE_ADDR;
                 mxc_nand_resources[0].end = MX31_NFC_BASE_ADDR + 0xfff;
+                mxc_register_device(&mxc_rnga_device, NULL);
         }
         if (cpu_is_mx35()) {
                 mxc_nand_resources[0].start = MX35_NFC_BASE_ADDR;
diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index beeb01aa029c..8986b7412235 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -52,6 +52,10 @@ config MXC_PWM
         help
           Enable support for the i.MX PWM controller(s).
 
+config ARCH_HAS_RNGA
+        bool
+        depends on ARCH_MXC
+
 config ARCH_MXC_IOMUX_V3
         bool
 endif