ARM: orion5x: convert DT to use the mvebu-mbus driver

This commit switches the Orion5x Device Tree files to use the DT
representation and probing for the mvebu-mbus driver. The changes are
mainly:

 * Re-organize the DT to follow the same organization as the one used
   on Armada 370/XP, which is needed for mvebu-mbus to work: a
   top-level soc { ... } node, which corresponds to the MBus bus, and
   a sub-node internal-regs { ... } for all peripherals whose register
   sit only in the "Internal Register Window". This change re-indents
   by one level the definition of all nodes in the Device Tree, which
   explains the large change.

 * Use custom functions orion5x_dt_init_early() and
   orion5x_dt_init_time() instead of orion5x_init_early() and
   orion5x_timer_init() as we now want the MBus driver to be probed
   from the Device Tree. We still use the old-style timer
   initialization, but that will be changed in a followup commit.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1398202002-28530-14-git-send-email-thomas.petazzoni@free-electrons.comSigned-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/orion5x-lacie-ethernet-disk-mini-v2.dts

@@ -10,7 +10,7 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
-#include "orion5x.dtsi"
+#include "orion5x-mv88f5182.dtsi"
 
 / {
 	model = "LaCie Ethernet Disk mini V2";
@@ -24,7 +24,11 @@ chosen {
 		bootargs = "console=ttyS0,115200n8 earlyprintk";
 	};
 
-	ocp@f1000000 {
+	soc {
+		ranges = <MBUS_ID(0xf0, 0x01) 0 0xf1000000 0x100000>,
+			 <MBUS_ID(0x09, 0x00) 0 0xf2200000 0x800>;
+
+		internal-regs {
 			serial@12000 {
 				clock-frequency = <166666667>;
 				status = "okay";
@@ -35,6 +39,7 @@ sata@80000 {
 				nr-ports = <2>;
 			};
 		};
+	};
 
 	gpio_keys {
 		compatible = "gpio-keys";

arch/arm/boot/dts/orion5x-mv88f5182.dtsi

+/*
+ * Copyright (C) 2014 Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include "orion5x.dtsi"
+
+/ {
+	compatible = "marvell,orion5x-88f5182", "marvell,orion5x";
+
+	soc {
+		compatible = "marvell,orion5x-88f5182-mbus", "simple-bus";
+
+		internal-regs {
+			mbusc: mbus-controller@20000 {
+				compatible = "marvell,mbus-controller";
+				reg = <0x20000 0x100>, <0x1500 0x20>;
+			};
+		};
+	};
+};

arch/arm/boot/dts/orion5x.dtsi

@@ -8,6 +8,8 @@
 
 #include "skeleton.dtsi"
 
+#define MBUS_ID(target,attributes) (((target) << 24) | ((attributes) << 16))
+
 / {
 	model = "Marvell Orion5x SoC";
 	compatible = "marvell,orion5x";
@@ -17,12 +19,16 @@ aliases {
 		gpio0 = &gpio0;
 	};
 
-	ocp@f1000000 {
+	soc {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		controller = <&mbusc>;
+
+		internal-regs {
 			compatible = "simple-bus";
-		ranges = <0x00000000 0xf1000000 0x4000000
-		          0xf2200000 0xf2200000 0x0000800>;
 			#address-cells = <1>;
 			#size-cells = <1>;
+			ranges = <0 MBUS_ID(0xf0, 0x01) 0 0x100000>;
 
 			gpio0: gpio@10100 {
 				compatible = "marvell,orion-gpio";
@@ -146,15 +152,6 @@ sata@80000 {
 				status = "disabled";
 			};
 
-		crypto@90000 {
-			compatible = "marvell,orion-crypto";
-			reg = <0x90000 0x10000>,
-			      <0xf2200000 0x800>;
-			reg-names = "regs", "sram";
-			interrupts = <28>;
-			status = "okay";
-		};
-
 			ehci@a0000 {
 				compatible = "marvell,orion-ehci";
 				reg = <0xa0000 0x1000>;
@@ -162,4 +159,14 @@ ehci@a0000 {
 				status = "disabled";
 			};
 		};
+
+		crypto@90000 {
+			compatible = "marvell,orion-crypto";
+			reg = <MBUS_ID(0xf0, 0x01) 0x90000 0x10000>,
+			      <MBUS_ID(0x09, 0x00) 0x0 0x800>;
+			reg-names = "regs", "sram";
+			interrupts = <28>;
+			status = "okay";
+		};
+	};
 };

arch/arm/mach-orion5x/board-dt.c

@@ -15,10 +15,14 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/cpu.h>
+#include <linux/mbus.h>
 #include <asm/system_misc.h>
 #include <asm/mach/arch.h>
+#include <asm/mach/map.h>
 #include <mach/orion5x.h>
+#include <mach/bridge-regs.h>
 #include <plat/irq.h>
+#include <plat/time.h>
 #include "common.h"
 
 static struct of_dev_auxdata orion5x_auxdata_lookup[] __initdata = {
@@ -31,6 +35,16 @@ static struct of_dev_auxdata orion5x_auxdata_lookup[] __initdata = {
 	{},
 };
 
+static void orion5x_dt_init_early(void)
+{
+	orion_time_set_base(TIMER_VIRT_BASE);
+}
+
+static void orion5x_dt_init_time(void)
+{
+	orion5x_timer_init();
+}
+
 static void __init orion5x_dt_init(void)
 {
 	char *dev_name;
@@ -39,6 +53,8 @@ static void __init orion5x_dt_init(void)
 	orion5x_id(&dev, &rev, &dev_name);
 	printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
 
+	BUG_ON(mvebu_mbus_dt_init());
+
 	/*
 	 * Setup Orion address map
 	 */
@@ -71,9 +87,9 @@ static const char *orion5x_dt_compat[] = {
 DT_MACHINE_START(ORION5X_DT, "Marvell Orion5x (Flattened Device Tree)")
 	/* Maintainer: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> */
 	.map_io		= orion5x_map_io,
-	.init_early	= orion5x_init_early,
+	.init_early	= orion5x_dt_init_early,
 	.init_irq	= orion_dt_init_irq,
-	.init_time	= orion5x_timer_init,
+	.init_time	= orion5x_dt_init_time,
 	.init_machine	= orion5x_dt_init,
 	.restart	= orion5x_restart,
 	.dt_compat	= orion5x_dt_compat,