[ARM] orion5x: add sram support for crypto

The security accelerator which can act as a puppet player for the crypto
engine requires its commands in the sram. This patch adds support for the
phys mapping and creates a platform device for the actual driver.

[ nico: renamed device name from "mv,orion5x-crypto" to "mv_crypto"
  so to match the module name and be more generic for Kirkwood use ]

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index c3e2bea2d054..eafcc49009ea 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -536,6 +536,42 @@ void __init orion5x_xor_init(void)
         platform_device_register(&orion5x_xor1_channel);
 }
 
+static struct resource orion5x_crypto_res[] = {
+        {
+                .name   = "regs",
+                .start  = ORION5X_CRYPTO_PHYS_BASE,
+                .end    = ORION5X_CRYPTO_PHYS_BASE + 0xffff,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .name   = "sram",
+                .start  = ORION5X_SRAM_PHYS_BASE,
+                .end    = ORION5X_SRAM_PHYS_BASE + SZ_8K - 1,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .name   = "crypto interrupt",
+                .start  = IRQ_ORION5X_CESA,
+                .end    = IRQ_ORION5X_CESA,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device orion5x_crypto_device = {
+        .name           = "mv_crypto",
+        .id             = -1,
+        .num_resources  = ARRAY_SIZE(orion5x_crypto_res),
+        .resource       = orion5x_crypto_res,
+};
+
+int __init orion5x_crypto_init(void)
+{
+        int ret;
+
+        ret = orion5x_setup_sram_win();
+        if (ret)
+                return ret;
+
+        return platform_device_register(&orion5x_crypto_device);
+}
 
 /*****************************************************************************
  * Watchdog