Merge branch 'arm-next' of git://git.xilinx.com/linux-xlnx into next/dt

From Michal Simek <michal.simek@xilinx.com>:

These are based on previous patches (arm-soc zynq/cleanup branch).
The branch is still based on rc3 but I have also tried to merged it
with the v3.7-rc5 and there is no issue.

* 'arm-next' of git://git.xilinx.com/linux-xlnx:
  ARM: zynq: add clk binding support to the ttc
  ARM: zynq: use zynq clk bindings
  clk: Add support for fundamental zynq clks
  ARM: zynq: dts: split up device tree
  ARM: zynq: Allow UART1 to be used as DEBUG_LL console.
  ARM: zynq: dts: add description of the second uart
  ARM: zynq: move arm-specific sys_timer out of ttc
  zynq: move static peripheral mappings
  zynq: remove use of CLKDEV_LOOKUP
  zynq: use pl310 device tree bindings
  zynq: use GIC device tree bindings

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

12 files changed, 459 insertions, 256 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index d33dc606f7ec..23252783e93f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -945,7 +945,7 @@ config ARCH_ZYNQ
 	bool "Xilinx Zynq ARM Cortex A9 Platform"
 	select ARM_AMBA
 	select ARM_GIC
-	select CLKDEV_LOOKUP
+	select COMMON_CLK
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
 	select ICST
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 5566520686a5..5bbfcf0d35e0 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -132,6 +132,23 @@ choice
 		  their output to UART1 serial port on DaVinci TNETV107X
 		  devices.
 
+	config DEBUG_ZYNQ_UART0
+		bool "Kernel low-level debugging on Xilinx Zynq using UART0"
+		depends on ARCH_ZYNQ
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to UART0 on the Zynq platform.
+
+	config DEBUG_ZYNQ_UART1
+		bool "Kernel low-level debugging on Xilinx Zynq using UART1"
+		depends on ARCH_ZYNQ
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to UART1 on the Zynq platform.
+
+		  If you have a ZC702 board and want early boot messages to
+		  appear on the USB serial adaptor, select this option.
+
 	config DEBUG_DC21285_PORT
 		bool "Kernel low-level debugging messages via footbridge serial port"
 		depends on FOOTBRIDGE
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 3353b7613208..97252d86a701 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -198,7 +198,6 @@ machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
 # by CONFIG_* macro name.
 plat-$(CONFIG_ARCH_OMAP)	+= omap
 plat-$(CONFIG_ARCH_S3C64XX)	+= samsung
-plat-$(CONFIG_ARCH_ZYNQ)	+= versatile
 plat-$(CONFIG_PLAT_IOP)		+= iop
 plat-$(CONFIG_PLAT_NOMADIK)	+= nomadik
 plat-$(CONFIG_PLAT_ORION)	+= orion
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 2458b69e2be6..23b178389eb7 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -105,5 +105,6 @@ dtb-$(CONFIG_ARCH_VEXPRESS) += vexpress-v2p-ca5s.dtb \
 dtb-$(CONFIG_ARCH_VT8500) += vt8500-bv07.dtb \
 	wm8505-ref.dtb \
 	wm8650-mid.dtb
+dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb
 
 endif
diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
new file mode 100644
index 000000000000..401c1262d4ed
--- /dev/null
+++ b/arch/arm/boot/dts/zynq-7000.dtsi
@@ -0,0 +1,166 @@
+/*
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+/include/ "skeleton.dtsi"
+
+/ {
+	compatible = "xlnx,zynq-7000";
+
+	amba {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		interrupt-parent = <&intc>;
+		ranges;
+
+		intc: interrupt-controller@f8f01000 {
+			compatible = "arm,cortex-a9-gic";
+			#interrupt-cells = <3>;
+			#address-cells = <1>;
+			interrupt-controller;
+			reg = <0xF8F01000 0x1000>,
+			      <0xF8F00100 0x100>;
+		};
+
+		L2: cache-controller {
+			compatible = "arm,pl310-cache";
+			reg = <0xF8F02000 0x1000>;
+			arm,data-latency = <2 3 2>;
+			arm,tag-latency = <2 3 2>;
+			cache-unified;
+			cache-level = <2>;
+		};
+
+		uart0: uart@e0000000 {
+			compatible = "xlnx,xuartps";
+			reg = <0xE0000000 0x1000>;
+			interrupts = <0 27 4>;
+			clock = <50000000>;
+		};
+
+		uart1: uart@e0001000 {
+			compatible = "xlnx,xuartps";
+			reg = <0xE0001000 0x1000>;
+			interrupts = <0 50 4>;
+			clock = <50000000>;
+		};
+
+		slcr: slcr@f8000000 {
+			compatible = "xlnx,zynq-slcr";
+			reg = <0xF8000000 0x1000>;
+
+			clocks {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				ps_clk: ps_clk {
+					#clock-cells = <0>;
+					compatible = "fixed-clock";
+					/* clock-frequency set in board-specific file */
+					clock-output-names = "ps_clk";
+				};
+				armpll: armpll {
+					#clock-cells = <0>;
+					compatible = "xlnx,zynq-pll";
+					clocks = <&ps_clk>;
+					reg = <0x100 0x110>;
+					clock-output-names = "armpll";
+				};
+				ddrpll: ddrpll {
+					#clock-cells = <0>;
+					compatible = "xlnx,zynq-pll";
+					clocks = <&ps_clk>;
+					reg = <0x104 0x114>;
+					clock-output-names = "ddrpll";
+				};
+				iopll: iopll {
+					#clock-cells = <0>;
+					compatible = "xlnx,zynq-pll";
+					clocks = <&ps_clk>;
+					reg = <0x108 0x118>;
+					clock-output-names = "iopll";
+				};
+				uart_clk: uart_clk {
+					#clock-cells = <1>;
+					compatible = "xlnx,zynq-periph-clock";
+					clocks = <&iopll &armpll &ddrpll>;
+					reg = <0x154>;
+					clock-output-names = "uart0_ref_clk",
+							     "uart1_ref_clk";
+				};
+				cpu_clk: cpu_clk {
+					#clock-cells = <1>;
+					compatible = "xlnx,zynq-cpu-clock";
+					clocks = <&iopll &armpll &ddrpll>;
+					reg = <0x120 0x1C4>;
+					clock-output-names = "cpu_6x4x",
+							     "cpu_3x2x",
+							     "cpu_2x",
+							     "cpu_1x";
+				};
+			};
+		};
+
+		ttc0: ttc0@f8001000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "xlnx,ttc";
+			reg = <0xF8001000 0x1000>;
+			clocks = <&cpu_clk 3>;
+			clock-names = "cpu_1x";
+			clock-ranges;
+
+			ttc0_0: ttc0.0 {
+				status = "disabled";
+				reg = <0>;
+				interrupts = <0 10 4>;
+			};
+			ttc0_1: ttc0.1 {
+				status = "disabled";
+				reg = <1>;
+				interrupts = <0 11 4>;
+			};
+			ttc0_2: ttc0.2 {
+				status = "disabled";
+				reg = <2>;
+				interrupts = <0 12 4>;
+			};
+		};
+
+		ttc1: ttc1@f8002000 {
+			#interrupt-parent = <&intc>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "xlnx,ttc";
+			reg = <0xF8002000 0x1000>;
+			clocks = <&cpu_clk 3>;
+			clock-names = "cpu_1x";
+			clock-ranges;
+
+			ttc1_0: ttc1.0 {
+				status = "disabled";
+				reg = <0>;
+				interrupts = <0 37 4>;
+			};
+			ttc1_1: ttc1.1 {
+				status = "disabled";
+				reg = <1>;
+				interrupts = <0 38 4>;
+			};
+			ttc1_2: ttc1.2 {
+				status = "disabled";
+				reg = <2>;
+				interrupts = <0 39 4>;
+			};
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/zynq-ep107.dts b/arch/arm/boot/dts/zynq-ep107.dts
deleted file mode 100644
index 37ca192fb193..000000000000
--- a/arch/arm/boot/dts/zynq-ep107.dts
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- *  Copyright (C) 2011 Xilinx
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-/dts-v1/;
-/ {
-	model = "Xilinx Zynq EP107";
-	compatible = "xlnx,zynq-ep107";
-	#address-cells = <1>;
-	#size-cells = <1>;
-	interrupt-parent = <&intc>;
-
-	memory {
-		device_type = "memory";
-		reg = <0x0 0x10000000>;
-	};
-
-	chosen {
-		bootargs = "console=ttyPS0,9600 root=/dev/ram rw initrd=0x800000,8M earlyprintk";
-		linux,stdout-path = &uart0;
-	};
-
-	amba {
-		compatible = "simple-bus";
-		#address-cells = <1>;
-		#size-cells = <1>;
-		ranges;
-
-		intc: interrupt-controller@f8f01000 {
-			interrupt-controller;
-			compatible = "arm,gic";
-			reg = <0xF8F01000 0x1000>;
-			#interrupt-cells = <2>;
-		};
-
-		uart0: uart@e0000000 {
-			compatible = "xlnx,xuartps";
-			reg = <0xE0000000 0x1000>;
-			interrupts = <59 0>;
-			clock = <50000000>;
-		};
-	};
-};
diff --git a/arch/arm/boot/dts/zynq-zc702.dts b/arch/arm/boot/dts/zynq-zc702.dts
new file mode 100644
index 000000000000..c772942a399a
--- /dev/null
+++ b/arch/arm/boot/dts/zynq-zc702.dts
@@ -0,0 +1,44 @@
+/*
+ *  Copyright (C) 2011 Xilinx
+ *  Copyright (C) 2012 National Instruments Corp.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+/dts-v1/;
+/include/ "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq ZC702 Development Board";
+	compatible = "xlnx,zynq-zc702", "xlnx,zynq-7000";
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x40000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyPS1,115200 earlyprintk";
+	};
+
+};
+
+&ps_clk {
+	clock-frequency = <33333330>;
+};
+
+&ttc0_0 {
+	status = "ok";
+	compatible = "xlnx,ttc-counter-clocksource";
+};
+
+&ttc0_1 {
+	status = "ok";
+	compatible = "xlnx,ttc-counter-clockevent";
+};
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index ab5cfddc0d7b..79bf5fb4dad3 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -19,19 +19,21 @@
 #include <linux/cpumask.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/clk/zynq.h>
+#include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/of.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
+#include <asm/mach/time.h>
 #include <asm/mach-types.h>
 #include <asm/page.h>
 #include <asm/hardware/gic.h>
 #include <asm/hardware/cache-l2x0.h>
 
 #include <mach/zynq_soc.h>
-#include <mach/clkdev.h>
 #include "common.h"
 
 static struct of_device_id zynq_of_bus_ids[] __initdata = {
@@ -45,22 +47,25 @@ static struct of_device_id zynq_of_bus_ids[] __initdata = {
  */
 static void __init xilinx_init_machine(void)
 {
-#ifdef CONFIG_CACHE_L2X0
 	/*
 	 * 64KB way size, 8-way associativity, parity disabled
 	 */
-	l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
-#endif
+	l2x0_of_init(0x02060000, 0xF0F0FFFF);
 
 	of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
 }
 
+static struct of_device_id irq_match[] __initdata = {
+	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+	{ }
+};
+
 /**
  * xilinx_irq_init() - Interrupt controller initialization for the GIC.
  */
 static void __init xilinx_irq_init(void)
 {
-	gic_init(0, 29, SCU_GIC_DIST_BASE, SCU_GIC_CPU_BASE);
+	of_irq_init(irq_match);
 }
 
 /* The minimum devices needed to be mapped before the VM system is up and
@@ -71,31 +76,47 @@ static struct map_desc io_desc[] __initdata = {
 	{
 		.virtual	= TTC0_VIRT,
 		.pfn		= __phys_to_pfn(TTC0_PHYS),
-		.length		= SZ_4K,
+		.length		= TTC0_SIZE,
 		.type		= MT_DEVICE,
 	}, {
 		.virtual	= SCU_PERIPH_VIRT,
 		.pfn		= __phys_to_pfn(SCU_PERIPH_PHYS),
-		.length		= SZ_8K,
-		.type		= MT_DEVICE,
-	}, {
-		.virtual	= PL310_L2CC_VIRT,
-		.pfn		= __phys_to_pfn(PL310_L2CC_PHYS),
-		.length		= SZ_4K,
+		.length		= SCU_PERIPH_SIZE,
 		.type		= MT_DEVICE,
 	},
 
 #ifdef CONFIG_DEBUG_LL
 	{
-		.virtual	= UART0_VIRT,
-		.pfn		= __phys_to_pfn(UART0_PHYS),
-		.length		= SZ_4K,
+		.virtual	= LL_UART_VADDR,
+		.pfn		= __phys_to_pfn(LL_UART_PADDR),
+		.length		= UART_SIZE,
 		.type		= MT_DEVICE,
 	},
 #endif
 
 };
 
+static void __init xilinx_zynq_timer_init(void)
+{
+	struct device_node *np;
+	void __iomem *slcr;
+
+	np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr");
+	slcr = of_iomap(np, 0);
+	WARN_ON(!slcr);
+
+	xilinx_zynq_clocks_init(slcr);
+
+	xttcpss_timer_init();
+}
+
+/*
+ * Instantiate and initialize the system timer structure
+ */
+static struct sys_timer xttcpss_sys_timer = {
+	.init		= xilinx_zynq_timer_init,
+};
+
 /**
  * xilinx_map_io() - Create memory mappings needed for early I/O.
  */
@@ -105,7 +126,8 @@ static void __init xilinx_map_io(void)
 }
 
 static const char *xilinx_dt_match[] = {
-	"xlnx,zynq-ep107",
+	"xlnx,zynq-zc702",
+	"xlnx,zynq-7000",
 	NULL
 };
 
diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h
index a009644a1555..954b91c13c91 100644
--- a/arch/arm/mach-zynq/common.h
+++ b/arch/arm/mach-zynq/common.h
@@ -17,8 +17,6 @@
 #ifndef __MACH_ZYNQ_COMMON_H__
 #define __MACH_ZYNQ_COMMON_H__
 
-#include <asm/mach/time.h>
-
-extern struct sys_timer xttcpss_sys_timer;
+void __init xttcpss_timer_init(void);
 
 #endif
diff --git a/arch/arm/mach-zynq/include/mach/clkdev.h b/arch/arm/mach-zynq/include/mach/clkdev.h
deleted file mode 100644
index c6e73d81a459..000000000000
--- a/arch/arm/mach-zynq/include/mach/clkdev.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * arch/arm/mach-zynq/include/mach/clkdev.h
- *
- *  Copyright (C) 2011 Xilinx, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __MACH_CLKDEV_H__
-#define __MACH_CLKDEV_H__
-
-#include <plat/clock.h>
-
-struct clk {
-	unsigned long		rate;
-	const struct clk_ops	*ops;
-	const struct icst_params *params;
-	void __iomem		*vcoreg;
-};
-
-#define __clk_get(clk) ({ 1; })
-#define __clk_put(clk) do { } while (0)
-
-#endif
diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach-zynq/include/mach/zynq_soc.h
index d0d3f8fb06dd..5ebbd8e6eeee 100644
--- a/arch/arm/mach-zynq/include/mach/zynq_soc.h
+++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h
@@ -15,34 +15,39 @@
 #ifndef __MACH_XILINX_SOC_H__
 #define __MACH_XILINX_SOC_H__
 
+#include <asm/pgtable.h>
+
 #define PERIPHERAL_CLOCK_RATE		2500000
 
-/* For now, all mappings are flat (physical = virtual)
+/* Static peripheral mappings are mapped at the top of the vmalloc region.  The
+ * early uart mapping causes intermediate problems/failure at certain
+ * addresses, including the very top of the vmalloc region.  Map it at an
+ * address that is known to work.
  */
-#define UART0_PHYS			0xE0000000
-#define UART0_VIRT			UART0_PHYS
-
-#define TTC0_PHYS			0xF8001000
-#define TTC0_VIRT			TTC0_PHYS
-
-#define PL310_L2CC_PHYS			0xF8F02000
-#define PL310_L2CC_VIRT			PL310_L2CC_PHYS
+#define UART0_PHYS		0xE0000000
+#define UART1_PHYS		0xE0001000
+#define UART_SIZE		SZ_4K
+#define UART_VIRT		0xF0001000
+
+#define TTC0_PHYS		0xF8001000
+#define TTC0_SIZE		SZ_4K
+#define TTC0_VIRT		(VMALLOC_END - TTC0_SIZE)
+
+#define SCU_PERIPH_PHYS		0xF8F00000
+#define SCU_PERIPH_SIZE		SZ_8K
+#define SCU_PERIPH_VIRT		(TTC0_VIRT - SCU_PERIPH_SIZE)
+
+#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1)
+# define LL_UART_PADDR		UART1_PHYS
+#else
+# define LL_UART_PADDR		UART0_PHYS
+#endif
 
-#define SCU_PERIPH_PHYS			0xF8F00000
-#define SCU_PERIPH_VIRT			SCU_PERIPH_PHYS
+#define LL_UART_VADDR		UART_VIRT
 
 /* The following are intended for the devices that are mapped early */
 
 #define TTC0_BASE			IOMEM(TTC0_VIRT)
 #define SCU_PERIPH_BASE			IOMEM(SCU_PERIPH_VIRT)
-#define SCU_GIC_CPU_BASE		(SCU_PERIPH_BASE + 0x100)
-#define SCU_GIC_DIST_BASE		(SCU_PERIPH_BASE + 0x1000)
-#define PL310_L2CC_BASE			IOMEM(PL310_L2CC_VIRT)
-
-/*
- * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
- */
-#define LL_UART_PADDR	UART0_PHYS
-#define LL_UART_VADDR	UART0_VIRT
 
 #endif
diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c
index c2c96cc7d6e7..9662306aa12f 100644
--- a/arch/arm/mach-zynq/timer.c
+++ b/arch/arm/mach-zynq/timer.c
@@ -23,32 +23,15 @@
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
 
-#include <asm/mach/time.h>
 #include <mach/zynq_soc.h>
 #include "common.h"
 
-#define IRQ_TIMERCOUNTER0	42
-
-/*
- * This driver configures the 2 16-bit count-up timers as follows:
- *
- * T1: Timer 1, clocksource for generic timekeeping
- * T2: Timer 2, clockevent source for hrtimers
- * T3: Timer 3, <unused>
- *
- * The input frequency to the timer module for emulation is 2.5MHz which is
- * common to all the timer channels (T1, T2, and T3). With a pre-scaler of 32,
- * the timers are clocked at 78.125KHz (12.8 us resolution).
- *
- * The input frequency to the timer module in silicon will be 200MHz. With the
- * pre-scaler of 32, the timers are clocked at 6.25MHz (160ns resolution).
- */
-#define XTTCPSS_CLOCKSOURCE	0	/* Timer 1 as a generic timekeeping */
-#define XTTCPSS_CLOCKEVENT	1	/* Timer 2 as a clock event */
-
-#define XTTCPSS_TIMER_BASE		TTC0_BASE
-#define XTTCPCC_EVENT_TIMER_IRQ		(IRQ_TIMERCOUNTER0 + 1)
 /*
  * Timer Register Offset Definitions of Timer 1, Increment base address by 4
  * and use same offsets for Timer 2
@@ -65,9 +48,14 @@
 
 #define XTTCPSS_CNT_CNTRL_DISABLE_MASK	0x1
 
-/* Setup the timers to use pre-scaling */
-
-#define TIMER_RATE (PERIPHERAL_CLOCK_RATE / 32)
+/* Setup the timers to use pre-scaling, using a fixed value for now that will
+ * work across most input frequency, but it may need to be more dynamic
+ */
+#define PRESCALE_EXPONENT	11	/* 2 ^ PRESCALE_EXPONENT = PRESCALE */
+#define PRESCALE		2048	/* The exponent must match this */
+#define CLK_CNTRL_PRESCALE	((PRESCALE_EXPONENT - 1) << 1)
+#define CLK_CNTRL_PRESCALE_EN	1
+#define CNT_CNTRL_RESET		(1<<4)
 
 /**
  * struct xttcpss_timer - This definition defines local timer structure
@@ -75,11 +63,25 @@
  * @base_addr:	Base address of timer
  **/
 struct xttcpss_timer {
-	void __iomem *base_addr;
+	void __iomem	*base_addr;
 };
 
-static struct xttcpss_timer timers[2];
-static struct clock_event_device xttcpss_clockevent;
+struct xttcpss_timer_clocksource {
+	struct xttcpss_timer	xttc;
+	struct clocksource	cs;
+};
+
+#define to_xttcpss_timer_clksrc(x) \
+		container_of(x, struct xttcpss_timer_clocksource, cs)
+
+struct xttcpss_timer_clockevent {
+	struct xttcpss_timer		xttc;
+	struct clock_event_device	ce;
+	struct clk			*clk;
+};
+
+#define to_xttcpss_timer_clkevent(x) \
+		container_of(x, struct xttcpss_timer_clockevent, ce)
 
 /**
  * xttcpss_set_interval - Set the timer interval value
@@ -101,7 +103,7 @@ static void xttcpss_set_interval(struct xttcpss_timer *timer,
 
 	/* Reset the counter (0x10) so that it starts from 0, one-shot
 	   mode makes this needed for timing to be right. */
-	ctrl_reg |= 0x10;
+	ctrl_reg |= CNT_CNTRL_RESET;
 	ctrl_reg &= ~XTTCPSS_CNT_CNTRL_DISABLE_MASK;
 	__raw_writel(ctrl_reg, timer->base_addr + XTTCPSS_CNT_CNTRL_OFFSET);
 }
@@ -116,90 +118,31 @@ static void xttcpss_set_interval(struct xttcpss_timer *timer,
  **/
 static irqreturn_t xttcpss_clock_event_interrupt(int irq, void *dev_id)
 {
-	struct clock_event_device *evt = &xttcpss_clockevent;
-	struct xttcpss_timer *timer = dev_id;
+	struct xttcpss_timer_clockevent *xttce = dev_id;
+	struct xttcpss_timer *timer = &xttce->xttc;
 
 	/* Acknowledge the interrupt and call event handler */
 	__raw_writel(__raw_readl(timer->base_addr + XTTCPSS_ISR_OFFSET),
 			timer->base_addr + XTTCPSS_ISR_OFFSET);
 
-	evt->event_handler(evt);
+	xttce->ce.event_handler(&xttce->ce);
 
 	return IRQ_HANDLED;
 }
 
-static struct irqaction event_timer_irq = {
-	.name	= "xttcpss clockevent",
-	.flags	= IRQF_DISABLED | IRQF_TIMER,
-	.handler = xttcpss_clock_event_interrupt,
-};
-
 /**
- * xttcpss_timer_hardware_init - Initialize the timer hardware
- *
- * Initialize the hardware to start the clock source, get the clock
- * event timer ready to use, and hook up the interrupt.
- **/
-static void __init xttcpss_timer_hardware_init(void)
-{
-	/* Setup the clock source counter to be an incrementing counter
-	 * with no interrupt and it rolls over at 0xFFFF. Pre-scale
-	   it by 32 also. Let it start running now.
-	 */
-	timers[XTTCPSS_CLOCKSOURCE].base_addr = XTTCPSS_TIMER_BASE;
-
-	__raw_writel(0x0, timers[XTTCPSS_CLOCKSOURCE].base_addr +
-				XTTCPSS_IER_OFFSET);
-	__raw_writel(0x9, timers[XTTCPSS_CLOCKSOURCE].base_addr +
-				XTTCPSS_CLK_CNTRL_OFFSET);
-	__raw_writel(0x10, timers[XTTCPSS_CLOCKSOURCE].base_addr +
-				XTTCPSS_CNT_CNTRL_OFFSET);
-
-	/* Setup the clock event timer to be an interval timer which
-	 * is prescaled by 32 using the interval interrupt. Leave it
-	 * disabled for now.
-	 */
-
-	timers[XTTCPSS_CLOCKEVENT].base_addr = XTTCPSS_TIMER_BASE + 4;
-
-	__raw_writel(0x23, timers[XTTCPSS_CLOCKEVENT].base_addr +
-			XTTCPSS_CNT_CNTRL_OFFSET);
-	__raw_writel(0x9, timers[XTTCPSS_CLOCKEVENT].base_addr +
-			XTTCPSS_CLK_CNTRL_OFFSET);
-	__raw_writel(0x1, timers[XTTCPSS_CLOCKEVENT].base_addr +
-			XTTCPSS_IER_OFFSET);
-
-	/* Setup IRQ the clock event timer */
-	event_timer_irq.dev_id = &timers[XTTCPSS_CLOCKEVENT];
-	setup_irq(XTTCPCC_EVENT_TIMER_IRQ, &event_timer_irq);
-}
-
-/**
- * __raw_readl_cycles - Reads the timer counter register
+ * __xttc_clocksource_read - Reads the timer counter register
  *
  * returns: Current timer counter register value
  **/
-static cycle_t __raw_readl_cycles(struct clocksource *cs)
+static cycle_t __xttc_clocksource_read(struct clocksource *cs)
 {
-	struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKSOURCE];
+	struct xttcpss_timer *timer = &to_xttcpss_timer_clksrc(cs)->xttc;
 
 	return (cycle_t)__raw_readl(timer->base_addr +
 				XTTCPSS_COUNT_VAL_OFFSET);
 }
 
-
-/*
- * Instantiate and initialize the clock source structure
- */
-static struct clocksource clocksource_xttcpss = {
-	.name		= "xttcpss_timer1",
-	.rating		= 200,			/* Reasonable clock source */
-	.read		= __raw_readl_cycles,
-	.mask		= CLOCKSOURCE_MASK(16),
-	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-
 /**
  * xttcpss_set_next_event - Sets the time interval for next event
  *
@@ -211,7 +154,8 @@ static struct clocksource clocksource_xttcpss = {
 static int xttcpss_set_next_event(unsigned long cycles,
 					struct clock_event_device *evt)
 {
-	struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKEVENT];
+	struct xttcpss_timer_clockevent *xttce = to_xttcpss_timer_clkevent(evt);
+	struct xttcpss_timer *timer = &xttce->xttc;
 
 	xttcpss_set_interval(timer, cycles);
 	return 0;
@@ -226,12 +170,15 @@ static int xttcpss_set_next_event(unsigned long cycles,
 static void xttcpss_set_mode(enum clock_event_mode mode,
 					struct clock_event_device *evt)
 {
-	struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKEVENT];
+	struct xttcpss_timer_clockevent *xttce = to_xttcpss_timer_clkevent(evt);
+	struct xttcpss_timer *timer = &xttce->xttc;
 	u32 ctrl_reg;
 
 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
-		xttcpss_set_interval(timer, TIMER_RATE / HZ);
+		xttcpss_set_interval(timer,
+				     DIV_ROUND_CLOSEST(clk_get_rate(xttce->clk),
+						       PRESCALE * HZ));
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
 	case CLOCK_EVT_MODE_UNUSED:
@@ -252,15 +199,106 @@ static void xttcpss_set_mode(enum clock_event_mode mode,
 	}
 }
 
-/*
- * Instantiate and initialize the clock event structure
- */
-static struct clock_event_device xttcpss_clockevent = {
-	.name		= "xttcpss_timer2",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.set_next_event	= xttcpss_set_next_event,
-	.set_mode	= xttcpss_set_mode,
-	.rating		= 200,
+static void __init zynq_ttc_setup_clocksource(struct device_node *np,
+					     void __iomem *base)
+{
+	struct xttcpss_timer_clocksource *ttccs;
+	struct clk *clk;
+	int err;
+	u32 reg;
+
+	ttccs = kzalloc(sizeof(*ttccs), GFP_KERNEL);
+	if (WARN_ON(!ttccs))
+		return;
+
+	err = of_property_read_u32(np, "reg", &reg);
+	if (WARN_ON(err))
+		return;
+
+	clk = of_clk_get_by_name(np, "cpu_1x");
+	if (WARN_ON(IS_ERR(clk)))
+		return;
+
+	err = clk_prepare_enable(clk);
+	if (WARN_ON(err))
+		return;
+
+	ttccs->xttc.base_addr = base + reg * 4;
+
+	ttccs->cs.name = np->name;
+	ttccs->cs.rating = 200;
+	ttccs->cs.read = __xttc_clocksource_read;
+	ttccs->cs.mask = CLOCKSOURCE_MASK(16);
+	ttccs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
+
+	__raw_writel(0x0,  ttccs->xttc.base_addr + XTTCPSS_IER_OFFSET);
+	__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
+		     ttccs->xttc.base_addr + XTTCPSS_CLK_CNTRL_OFFSET);
+	__raw_writel(CNT_CNTRL_RESET,
+		     ttccs->xttc.base_addr + XTTCPSS_CNT_CNTRL_OFFSET);
+
+	err = clocksource_register_hz(&ttccs->cs, clk_get_rate(clk) / PRESCALE);
+	if (WARN_ON(err))
+		return;
+}
+
+static void __init zynq_ttc_setup_clockevent(struct device_node *np,
+					    void __iomem *base)
+{
+	struct xttcpss_timer_clockevent *ttcce;
+	int err, irq;
+	u32 reg;
+
+	ttcce = kzalloc(sizeof(*ttcce), GFP_KERNEL);
+	if (WARN_ON(!ttcce))
+		return;
+
+	err = of_property_read_u32(np, "reg", &reg);
+	if (WARN_ON(err))
+		return;
+
+	ttcce->xttc.base_addr = base + reg * 4;
+
+	ttcce->clk = of_clk_get_by_name(np, "cpu_1x");
+	if (WARN_ON(IS_ERR(ttcce->clk)))
+		return;
+
+	err = clk_prepare_enable(ttcce->clk);
+	if (WARN_ON(err))
+		return;
+
+	irq = irq_of_parse_and_map(np, 0);
+	if (WARN_ON(!irq))
+		return;
+
+	ttcce->ce.name = np->name;
+	ttcce->ce.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+	ttcce->ce.set_next_event = xttcpss_set_next_event;
+	ttcce->ce.set_mode = xttcpss_set_mode;
+	ttcce->ce.rating = 200;
+	ttcce->ce.irq = irq;
+
+	__raw_writel(0x23, ttcce->xttc.base_addr + XTTCPSS_CNT_CNTRL_OFFSET);
+	__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
+		     ttcce->xttc.base_addr + XTTCPSS_CLK_CNTRL_OFFSET);
+	__raw_writel(0x1,  ttcce->xttc.base_addr + XTTCPSS_IER_OFFSET);
+
+	err = request_irq(irq, xttcpss_clock_event_interrupt, IRQF_TIMER,
+			  np->name, ttcce);
+	if (WARN_ON(err))
+		return;
+
+	clockevents_config_and_register(&ttcce->ce,
+					clk_get_rate(ttcce->clk) / PRESCALE,
+					1, 0xfffe);
+}
+
+static const __initconst struct of_device_id zynq_ttc_match[] = {
+	{ .compatible = "xlnx,ttc-counter-clocksource",
+		.data = zynq_ttc_setup_clocksource, },
+	{ .compatible = "xlnx,ttc-counter-clockevent",
+		.data = zynq_ttc_setup_clockevent, },
+	{}
 };
 
 /**
@@ -269,30 +307,27 @@ static struct clock_event_device xttcpss_clockevent = {
  * Initializes the timer hardware and register the clock source and clock event
  * timers with Linux kernal timer framework
  **/
-static void __init xttcpss_timer_init(void)
+void __init xttcpss_timer_init(void)
 {
-	xttcpss_timer_hardware_init();
-	clocksource_register_hz(&clocksource_xttcpss, TIMER_RATE);
-
-	/* Calculate the parameters to allow the clockevent to operate using
-	   integer math
-	*/
-	clockevents_calc_mult_shift(&xttcpss_clockevent, TIMER_RATE, 4);
-
-	xttcpss_clockevent.max_delta_ns =
-		clockevent_delta2ns(0xfffe, &xttcpss_clockevent);
-	xttcpss_clockevent.min_delta_ns =
-		clockevent_delta2ns(1, &xttcpss_clockevent);
-
-	/* Indicate that clock event is on 1st CPU as SMP boot needs it */
-
-	xttcpss_clockevent.cpumask = cpumask_of(0);
-	clockevents_register_device(&xttcpss_clockevent);
+	struct device_node *np;
+
+	for_each_compatible_node(np, NULL, "xlnx,ttc") {
+		struct device_node *np_chld;
+		void __iomem *base;
+
+		base = of_iomap(np, 0);
+		if (WARN_ON(!base))
+			return;
+
+		for_each_available_child_of_node(np, np_chld) {
+			int (*cb)(struct device_node *np, void __iomem *base);
+			const struct of_device_id *match;
+
+			match = of_match_node(zynq_ttc_match, np_chld);
+			if (match) {
+				cb = match->data;
+				cb(np_chld, base);
+			}
+		}
+	}
 }
-
-/*
- * Instantiate and initialize the system timer structure
- */
-struct sys_timer xttcpss_sys_timer = {
-	.init		= xttcpss_timer_init,
-};