Crypto: CESA: Add support for DT based instantiation.

Based on work by Michael Walle and Jason Cooper.

Added support for getting the interrupt number and address of SRAM
from DT.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

Conflicts:

	arch/arm/mach-kirkwood/board-dt.c

Documentation/devicetree/bindings/crypto/mv_cesa.txt

+Marvell Cryptographic Engines And Security Accelerator
+
+Required properties:
+- compatible : should be "marvell,orion-crypto"
+- reg : base physical address of the engine and length of memory mapped
+        region, followed by base physical address of sram and its memory
+        length
+- reg-names : "regs" , "sram";
+- interrupts : interrupt number
+
+Examples:
+
+	crypto@30000 {
+		compatible = "marvell,orion-crypto";
+		reg = <0x30000 0x10000>,
+		      <0x4000000 0x800>;
+		reg-names = "regs" , "sram";
+		interrupts = <22>;
+		status = "okay";
+	};

arch/arm/boot/dts/kirkwood.dtsi

@@ -14,7 +14,8 @@ intc: interrupt-controller {
 
 	ocp@f1000000 {
 		compatible = "simple-bus";
-		ranges = <0 0xf1000000 0x4000000>;
+		ranges = <0x00000000 0xf1000000 0x4000000
+		          0xf5000000 0xf5000000 0x0000400>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 
@@ -105,5 +106,14 @@ i2c@11000 {
 			clock-frequency = <100000>;
 			status = "disabled";
 		};
+
+		crypto@30000 {
+			compatible = "marvell,orion-crypto";
+			reg = <0x30000 0x10000>,
+			      <0xf5000000 0x800>;
+			reg-names = "regs", "sram";
+			interrupts = <22>;
+			status = "okay";
+		};
 	};
 };

arch/arm/mach-kirkwood/board-dt.c

@@ -33,6 +33,7 @@ struct of_dev_auxdata kirkwood_auxdata_lookup[] __initdata = {
 	OF_DEV_AUXDATA("marvell,orion-wdt", 0xf1020300, "orion_wdt", NULL),
 	OF_DEV_AUXDATA("marvell,orion-sata", 0xf1080000, "sata_mv.0", NULL),
 	OF_DEV_AUXDATA("marvell,orion-nand", 0xf4000000, "orion_nand", NULL),
+	OF_DEV_AUXDATA("marvell,orion-crypto", 0xf1030000, "mv_crypto", NULL),
 	{},
 };
 
@@ -60,7 +61,6 @@ static void __init kirkwood_dt_init(void)
 	/* internal devices that every board has */
 	kirkwood_xor0_init();
 	kirkwood_xor1_init();
-	kirkwood_crypto_init();
 
 #ifdef CONFIG_KEXEC
 	kexec_reinit = kirkwood_enable_pcie;

drivers/crypto/mv_cesa.c

@@ -19,6 +19,9 @@
 #include <linux/clk.h>
 #include <crypto/internal/hash.h>
 #include <crypto/sha.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
 
 #include "mv_cesa.h"
 
@@ -1062,6 +1065,9 @@ static int mv_probe(struct platform_device *pdev)
 		goto err_unmap_reg;
 	}
 
+	if (pdev->dev.of_node)
+		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+	else
 		irq = platform_get_irq(pdev, 0);
 	if (irq < 0 || irq == NO_IRQ) {
 		ret = irq;
@@ -1170,12 +1176,19 @@ static int mv_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id mv_cesa_of_match_table[] = {
+	{ .compatible = "marvell,orion-crypto", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mv_cesa_of_match_table);
+
 static struct platform_driver marvell_crypto = {
 	.probe		= mv_probe,
-	.remove		= mv_remove,
+	.remove		= __devexit_p(mv_remove),
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "mv_crypto",
+		.of_match_table = of_match_ptr(mv_cesa_of_match_table),
 	},
 };
 MODULE_ALIAS("platform:mv_crypto");