ARM: kirkwood: convert to DT irqchip and clocksource

With recent support for true irqchip and clocksource drivers for Orion
SoCs, now make use of it on DT enabled Kirkwood boards.

This also introduces a new Kconfig option for legacy (non-DT) Kirkwood
where old code is moved out to and polishes DT board file a little bit.
Signed-off-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/mach-kirkwood/Kconfig

@@ -2,67 +2,81 @@ if ARCH_KIRKWOOD
 
 menu "Marvell Kirkwood Implementations"
 
+config KIRKWOOD_LEGACY
+	bool
+
 config MACH_D2NET_V2
 	bool "LaCie d2 Network v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie d2 Network v2 NAS.
 
 config MACH_DOCKSTAR
 	bool "Seagate FreeAgent DockStar"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Seagate FreeAgent DockStar.
 
 config MACH_ESATA_SHEEVAPLUG
 	bool "Marvell eSATA SheevaPlug Reference Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell eSATA SheevaPlug Reference Board.
 
 config MACH_GURUPLUG
 	bool "Marvell GuruPlug Reference Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell GuruPlug Reference Board.
 
 config MACH_INETSPACE_V2
 	bool "LaCie Internet Space v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie Internet Space v2 NAS.
 
 config MACH_MV88F6281GTW_GE
 	bool "Marvell 88F6281 GTW GE Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell 88F6281 GTW GE Board.
 
 config MACH_NET2BIG_V2
 	bool "LaCie 2Big Network v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie 2Big Network v2 NAS.
 
 config MACH_NET5BIG_V2
 	bool "LaCie 5Big Network v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie 5Big Network v2 NAS.
 
 config MACH_NETSPACE_MAX_V2
 	bool "LaCie Network Space Max v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie Network Space Max v2 NAS.
 
 config MACH_NETSPACE_V2
 	bool "LaCie Network Space v2 NAS Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie Network Space v2 NAS.
 
 config MACH_OPENRD
+	select KIRKWOOD_LEGACY
         bool
 
 config MACH_OPENRD_BASE
@@ -88,30 +102,35 @@ config MACH_OPENRD_ULTIMATE
 
 config MACH_RD88F6192_NAS
 	bool "Marvell RD-88F6192-NAS Reference Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell RD-88F6192-NAS Reference Board.
 
 config MACH_RD88F6281
 	bool "Marvell RD-88F6281 Reference Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell RD-88F6281 Reference Board.
 
 config MACH_SHEEVAPLUG
 	bool "Marvell SheevaPlug Reference Board"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell SheevaPlug Reference Board.
 
 config MACH_T5325
 	bool "HP t5325 Thin Client"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  HP t5325 Thin Client.
 
 config MACH_TS219
 	bool "QNAP TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and TS-219P+ Turbo NAS"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  QNAP TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and
@@ -119,6 +138,7 @@ config MACH_TS219
 
 config MACH_TS41X
 	bool "QNAP TS-410, TS-410U, TS-419P, TS-419P+ and TS-419U Turbo NAS"
+	select KIRKWOOD_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  QNAP TS-410, TS-410U, TS-419P, TS-419P+ and TS-419U Turbo
@@ -129,6 +149,8 @@ comment "Device tree entries"
 config ARCH_KIRKWOOD_DT
 	bool "Marvell Kirkwood Flattened Device Tree"
 	select KIRKWOOD_CLK
+	select ORION_IRQCHIP
+	select ORION_TIMER
 	select POWER_SUPPLY
 	select POWER_RESET
 	select POWER_RESET_GPIO

arch/arm/mach-kirkwood/Makefile

-obj-y				+= common.o irq.o pcie.o mpp.o
-
+obj-y				+= common.o pcie.o
+obj-$(CONFIG_KIRKWOOD_LEGACY)	+= irq.o mpp.o
 obj-$(CONFIG_MACH_D2NET_V2)		+= d2net_v2-setup.o lacie_v2-common.o
 obj-$(CONFIG_MACH_DOCKSTAR)		+= dockstar-setup.o
 obj-$(CONFIG_MACH_ESATA_SHEEVAPLUG)	+= sheevaplug-setup.o

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

@@ -15,6 +15,9 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/irqchip.h>
 #include <linux/kexec.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -67,10 +70,17 @@ static void __init kirkwood_legacy_clk_init(void)
 	clk_prepare_enable(clk);
 }
 
-static void __init kirkwood_of_clk_init(void)
+static void __init kirkwood_dt_time_init(void)
 {
 	of_clk_init(NULL);
-	kirkwood_legacy_clk_init();
+	clocksource_of_init();
+}
+
+static void __init kirkwood_dt_init_early(void)
+{
+	mvebu_mbus_init("marvell,kirkwood-mbus",
+			BRIDGE_WINS_BASE, BRIDGE_WINS_SZ,
+			DDR_WINDOW_CPU_BASE, DDR_WINDOW_CPU_SZ);
 }
 
 static void __init kirkwood_dt_init(void)
@@ -91,8 +101,8 @@ static void __init kirkwood_dt_init(void)
 
 	kirkwood_cpufreq_init();
 
-	/* Setup root of clk tree */
-	kirkwood_of_clk_init();
+	/* Setup clocks for legacy devices */
+	kirkwood_legacy_clk_init();
 
 	kirkwood_cpuidle_init();
 
@@ -114,9 +124,8 @@ static const char * const kirkwood_dt_board_compat[] = {
 DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
 	/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
 	.map_io		= kirkwood_map_io,
-	.init_early	= kirkwood_init_early,
-	.init_irq	= orion_dt_init_irq,
-	.init_time	= kirkwood_timer_init,
+	.init_early	= kirkwood_dt_init_early,
+	.init_time	= kirkwood_dt_time_init,
 	.init_machine	= kirkwood_dt_init,
 	.restart	= kirkwood_restart,
 	.dt_compat	= kirkwood_dt_board_compat,