Merge branch 'zynq/multiplatform' of git://git.monstr.eu/linux-2.6-microblaze into next/multiplatform

From Michal Simek:

This branch depends on arm-soc devel/debug_ll_init branch because
we needed Rob's "ARM: implement debug_ll_io_init()"
(sha1: afaee03511ba8002b26a9c6b1fe7d6baf33eac86)
patch.

This branch also depends on zynq/dt branch because of previous major
zynq changes.
zynq/cleanup branch is subset of zynq/dt.

* 'zynq/multiplatform' of git://git.monstr.eu/linux-2.6-microblaze:
  ARM: zynq: Remove all unused mach headers
  ARM: zynq: add support for ARCH_MULTIPLATFORM
  ARM: zynq: make use of debug_ll_io_init()
  ARM: zynq: remove TTC early mapping
  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

Add/add conflict in arch/arm/Kconfig.debug.

Signed-off-by: Olof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/clock/zynq-7000.txt

@@ -0,0 +1,55 @@
+Device Tree Clock bindings for the Zynq 7000 EPP
+
+The Zynq EPP has several different clk providers, each with there own bindings.
+The purpose of this document is to document their usage.
+
+See clock_bindings.txt for more information on the generic clock bindings.
+See Chapter 25 of Zynq TRM for more information about Zynq clocks.
+
+== PLLs ==
+
+Used to describe the ARM_PLL, DDR_PLL, and IO_PLL.
+
+Required properties:
+- #clock-cells : shall be 0 (only one clock is output from this node)
+- compatible : "xlnx,zynq-pll"
+- reg : pair of u32 values, which are the address offsets within the SLCR
+        of the relevant PLL_CTRL register and PLL_CFG register respectively
+- clocks : phandle for parent clock.  should be the phandle for ps_clk
+
+Optional properties:
+- clock-output-names : name of the output clock
+
+Example:
+	armpll: armpll {
+		#clock-cells = <0>;
+		compatible = "xlnx,zynq-pll";
+		clocks = <&ps_clk>;
+		reg = <0x100 0x110>;
+		clock-output-names = "armpll";
+	};
+
+== Peripheral clocks ==
+
+Describes clock node for the SDIO, SMC, SPI, QSPI, and UART clocks.
+
+Required properties:
+- #clock-cells : shall be 1
+- compatible : "xlnx,zynq-periph-clock"
+- reg : a single u32 value, describing the offset within the SLCR where
+        the CLK_CTRL register is found for this peripheral
+- clocks : phandle for parent clocks.  should hold phandles for
+           the IO_PLL, ARM_PLL, and DDR_PLL in order
+- clock-output-names : names of the output clock(s).  For peripherals that have
+                       two output clocks (for example, the UART), two clocks
+                       should be listed.
+
+Example:
+	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";
+	};

arch/arm/Kconfig

@@ -960,18 +960,6 @@ config ARCH_VT8500_SINGLE
 	help
 	  Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
 
-config ARCH_ZYNQ
-	bool "Xilinx Zynq ARM Cortex A9 Platform"
-	select ARM_AMBA
-	select ARM_GIC
-	select CLKDEV_LOOKUP
-	select CPU_V7
-	select GENERIC_CLOCKEVENTS
-	select ICST
-	select MIGHT_HAVE_CACHE_L2X0
-	select USE_OF
-	help
-	  Support for Xilinx Zynq ARM Cortex A9 Platform
 endchoice
 
 menu "Multiple platform selection"
@@ -1134,6 +1122,8 @@ source "arch/arm/mach-vt8500/Kconfig"
 
 source "arch/arm/mach-w90x900/Kconfig"
 
+source "arch/arm/mach-zynq/Kconfig"
+
 # Definitions to make life easier
 config ARCH_ACORN
 	bool

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
@@ -456,6 +473,7 @@ config DEBUG_LL_INCLUDE
 	default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
 		DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1
 	default "debug/tegra.S" if DEBUG_TEGRA_UART
+	default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
 	default "mach/debug-macro.S"
 
 config EARLY_PRINTK

arch/arm/Makefile

@@ -199,7 +199,6 @@ machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
 plat-$(CONFIG_ARCH_MXC)		+= mxc
 plat-$(CONFIG_ARCH_OMAP)	+= omap
 plat-$(CONFIG_ARCH_S3C64XX)	+= samsung
-plat-$(CONFIG_ARCH_ZYNQ)	+= versatile
 plat-$(CONFIG_PLAT_IOP)		+= iop
 plat-$(CONFIG_PLAT_ORION)	+= orion
 plat-$(CONFIG_PLAT_PXA)		+= pxa

arch/arm/boot/dts/Makefile

@@ -103,5 +103,6 @@ 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

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>;
+			};
+		};
+	};
+};

arch/arm/boot/dts/zynq-ep107.dts

@@ -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>;
-		};
-	};
-};

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";
+};

arch/arm/mach-zynq/include/mach/debug-macro.S → arch/arm/include/debug/zynq.S

@@ -1,5 +1,4 @@
-/* arch/arm/mach-zynq/include/mach/debug-macro.S
- *
+/*
  * Debugging macro include header
  *
  *  Copyright (C) 2011 Xilinx
@@ -13,9 +12,25 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */
+#define UART_CR_OFFSET		0x00  /* Control Register [8:0] */
+#define UART_SR_OFFSET		0x2C  /* Channel Status [11:0] */
+#define UART_FIFO_OFFSET	0x30  /* FIFO [15:0] or [7:0] */
+
+#define UART_SR_TXFULL		0x00000010	/* TX FIFO full */
+#define UART_SR_TXEMPTY		0x00000008	/* TX FIFO empty */
+
+#define UART0_PHYS		0xE0000000
+#define UART1_PHYS		0xE0001000
+#define UART_SIZE		SZ_4K
+#define UART_VIRT		0xF0001000
+
+#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1)
+# define LL_UART_PADDR		UART1_PHYS
+#else
+# define LL_UART_PADDR		UART0_PHYS
+#endif
 
-#include <mach/zynq_soc.h>
-#include <mach/uart.h>
+#define LL_UART_VADDR		UART_VIRT
 
 		.macro	addruart, rp, rv, tmp
 		ldr	\rp, =LL_UART_PADDR	@ physical

arch/arm/mach-zynq/Kconfig

@@ -0,0 +1,13 @@
+config ARCH_ZYNQ
+	bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7
+	select ARM_AMBA
+	select ARM_GIC
+	select COMMON_CLK
+	select CPU_V7
+	select GENERIC_CLOCKEVENTS
+	select ICST
+	select MIGHT_HAVE_CACHE_L2X0
+	select USE_OF
+	select SPARSE_IRQ
+	help
+	  Support for Xilinx Zynq ARM Cortex A9 Platform

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/pgtable.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 = {
@@ -45,55 +47,57 @@ 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
- * running include the GIC, UART and Timer Counter.
- */
+#define SCU_PERIPH_PHYS		0xF8F00000
+#define SCU_PERIPH_SIZE		SZ_8K
+#define SCU_PERIPH_VIRT		(VMALLOC_END - SCU_PERIPH_SIZE)
+
+static struct map_desc scu_desc __initdata = {
+	.virtual	= SCU_PERIPH_VIRT,
+	.pfn		= __phys_to_pfn(SCU_PERIPH_PHYS),
+	.length		= SCU_PERIPH_SIZE,
+	.type		= MT_DEVICE,
+};
+
+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);
 
-static struct map_desc io_desc[] __initdata = {
-	{
-		.virtual	= TTC0_VIRT,
-		.pfn		= __phys_to_pfn(TTC0_PHYS),
-		.length		= SZ_4K,
-		.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,
-		.type		= MT_DEVICE,
-	},
-
-#ifdef CONFIG_DEBUG_LL
-	{
-		.virtual	= UART0_VIRT,
-		.pfn		= __phys_to_pfn(UART0_PHYS),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
-	},
-#endif
+	xttcpss_timer_init();
+}
 
+/*
+ * Instantiate and initialize the system timer structure
+ */
+static struct sys_timer xttcpss_sys_timer = {
+	.init		= xilinx_zynq_timer_init,
 };
 
 /**
@@ -101,11 +105,13 @@ static struct map_desc io_desc[] __initdata = {
  */
 static void __init xilinx_map_io(void)
 {
-	iotable_init(io_desc, ARRAY_SIZE(io_desc));
+	debug_ll_io_init();
+	iotable_init(&scu_desc, 1);
 }
 
 static const char *xilinx_dt_match[] = {
-	"xlnx,zynq-ep107",
+	"xlnx,zynq-zc702",
+	"xlnx,zynq-7000",
 	NULL
 };
 

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

arch/arm/mach-zynq/include/mach/clkdev.h

@@ -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

arch/arm/mach-zynq/include/mach/hardware.h

@@ -1,18 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/hardware.h
- *
- *  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.
- */
-
-#ifndef __MACH_HARDWARE_H__
-#define __MACH_HARDWARE_H__
-
-#endif

arch/arm/mach-zynq/include/mach/irqs.h

@@ -1,21 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/irqs.h
- *
- *  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.
- */
-
-#ifndef __MACH_IRQS_H
-#define __MACH_IRQS_H
-
-#define ARCH_NR_GPIOS	118
-#define NR_IRQS		(128 + ARCH_NR_GPIOS)
-
-#endif

arch/arm/mach-zynq/include/mach/timex.h

@@ -1,23 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/timex.h
- *
- *  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.
- */
-
-#ifndef __MACH_TIMEX_H__
-#define __MACH_TIMEX_H__
-
-/* the following is needed for the system to build but will be removed
-   in the future, the value is not important but won't hurt
-*/
-#define CLOCK_TICK_RATE	(100 * HZ)
-
-#endif

arch/arm/mach-zynq/include/mach/uart.h

@@ -1,25 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/uart.h
- *
- *  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.
- */
-
-#ifndef __MACH_UART_H__
-#define __MACH_UART_H__
-
-#define UART_CR_OFFSET		0x00  /* Control Register [8:0] */
-#define UART_SR_OFFSET		0x2C  /* Channel Status [11:0] */
-#define UART_FIFO_OFFSET	0x30  /* FIFO [15:0] or [7:0] */
-
-#define UART_SR_TXFULL		0x00000010	/* TX FIFO full */
-#define UART_SR_TXEMPTY		0x00000008	/* TX FIFO empty */
-
-#endif

arch/arm/mach-zynq/include/mach/uncompress.h

@@ -1,51 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/uncompress.h
- *
- *  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.
- */
-
-#ifndef __MACH_UNCOMPRESS_H__
-#define __MACH_UNCOMPRESS_H__
-
-#include <linux/io.h>
-#include <asm/processor.h>
-#include <mach/zynq_soc.h>
-#include <mach/uart.h>
-
-void arch_decomp_setup(void)
-{
-}
-
-static inline void flush(void)
-{
-	/*
-	 * Wait while the FIFO is not empty
-	 */
-	while (!(__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
-		UART_SR_TXEMPTY))
-		cpu_relax();
-}
-
-#define arch_decomp_wdog()
-
-static void putc(char ch)
-{
-	/*
-	 * Wait for room in the FIFO, then write the char into the FIFO
-	 */
-	while (__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
-		UART_SR_TXFULL)
-		cpu_relax();
-
-	__raw_writel(ch, IOMEM(LL_UART_PADDR + UART_FIFO_OFFSET));
-}
-
-#endif

arch/arm/mach-zynq/include/mach/zynq_soc.h

@@ -1,48 +0,0 @@
-/* arch/arm/mach-zynq/include/mach/zynq_soc.h
- *
- *  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.
- */
-
-#ifndef __MACH_XILINX_SOC_H__
-#define __MACH_XILINX_SOC_H__
-
-#define PERIPHERAL_CLOCK_RATE		2500000
-
-/* For now, all mappings are flat (physical = virtual)
- */
-#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 SCU_PERIPH_PHYS			0xF8F00000
-#define SCU_PERIPH_VIRT			SCU_PERIPH_PHYS
-
-/* 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

arch/arm/mach-zynq/timer.c

@@ -23,32 +23,14 @@
 #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 +47,14 @@
 
 #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 +62,25 @@
  * @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 +102,7 @@ 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 +117,31 @@ 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 +153,8 @@ 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 +169,15 @@ 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 +198,106 @@ 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 +306,27 @@ 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,
-};

drivers/clk/Makefile

@@ -19,6 +19,7 @@ endif
 obj-$(CONFIG_MACH_LOONGSON1)	+= clk-ls1x.o
 obj-$(CONFIG_ARCH_U8500)	+= ux500/
 obj-$(CONFIG_ARCH_VT8500)	+= clk-vt8500.o
+obj-$(CONFIG_ARCH_ZYNQ)		+= clk-zynq.o
 
 # Chip specific
 obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o

drivers/clk/clk-zynq.c

@@ -0,0 +1,383 @@
+/*
+ * Copyright (c) 2012 National Instruments
+ *
+ * Josh Cartwright <josh.cartwright@ni.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/clk-provider.h>
+
+static void __iomem *slcr_base;
+
+struct zynq_pll_clk {
+	struct clk_hw	hw;
+	void __iomem	*pll_ctrl;
+	void __iomem	*pll_cfg;
+};
+
+#define to_zynq_pll_clk(hw)	container_of(hw, struct zynq_pll_clk, hw)
+
+#define CTRL_PLL_FDIV(x)	((x) >> 12)
+
+static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw,
+					  unsigned long parent_rate)
+{
+	struct zynq_pll_clk *pll = to_zynq_pll_clk(hw);
+	return parent_rate * CTRL_PLL_FDIV(ioread32(pll->pll_ctrl));
+}
+
+static const struct clk_ops zynq_pll_clk_ops = {
+	.recalc_rate	= zynq_pll_recalc_rate,
+};
+
+static void __init zynq_pll_clk_setup(struct device_node *np)
+{
+	struct clk_init_data init;
+	struct zynq_pll_clk *pll;
+	const char *parent_name;
+	struct clk *clk;
+	u32 regs[2];
+	int ret;
+
+	ret = of_property_read_u32_array(np, "reg", regs, ARRAY_SIZE(regs));
+	if (WARN_ON(ret))
+		return;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (WARN_ON(!pll))
+		return;
+
+	pll->pll_ctrl = slcr_base + regs[0];
+	pll->pll_cfg  = slcr_base + regs[1];
+
+	of_property_read_string(np, "clock-output-names", &init.name);
+
+	init.ops = &zynq_pll_clk_ops;
+	parent_name = of_clk_get_parent_name(np, 0);
+	init.parent_names = &parent_name;
+	init.num_parents = 1;
+
+	pll->hw.init = &init;
+
+	clk = clk_register(NULL, &pll->hw);
+	if (WARN_ON(IS_ERR(clk)))
+		return;
+
+	ret = of_clk_add_provider(np, of_clk_src_simple_get, clk);
+	if (WARN_ON(ret))
+		return;
+}
+
+struct zynq_periph_clk {
+	struct clk_hw		hw;
+	struct clk_onecell_data	onecell_data;
+	struct clk		*gates[2];
+	void __iomem		*clk_ctrl;
+	spinlock_t		clkact_lock;
+};
+
+#define to_zynq_periph_clk(hw)	container_of(hw, struct zynq_periph_clk, hw)
+
+static const u8 periph_clk_parent_map[] = {
+	0, 0, 1, 2
+};
+#define PERIPH_CLK_CTRL_SRC(x)	(periph_clk_parent_map[((x) & 0x30) >> 4])
+#define PERIPH_CLK_CTRL_DIV(x)	(((x) & 0x3F00) >> 8)
+
+static unsigned long zynq_periph_recalc_rate(struct clk_hw *hw,
+					     unsigned long parent_rate)
+{
+	struct zynq_periph_clk *periph = to_zynq_periph_clk(hw);
+	return parent_rate / PERIPH_CLK_CTRL_DIV(ioread32(periph->clk_ctrl));
+}
+
+static u8 zynq_periph_get_parent(struct clk_hw *hw)
+{
+	struct zynq_periph_clk *periph = to_zynq_periph_clk(hw);
+	return PERIPH_CLK_CTRL_SRC(ioread32(periph->clk_ctrl));
+}
+
+static const struct clk_ops zynq_periph_clk_ops = {
+	.recalc_rate	= zynq_periph_recalc_rate,
+	.get_parent	= zynq_periph_get_parent,
+};
+
+static void __init zynq_periph_clk_setup(struct device_node *np)
+{
+	struct zynq_periph_clk *periph;
+	const char *parent_names[3];
+	struct clk_init_data init;
+	int clk_num = 0, err;
+	const char *name;
+	struct clk *clk;
+	u32 reg;
+	int i;
+
+	err = of_property_read_u32(np, "reg", &reg);
+	if (WARN_ON(err))
+		return;
+
+	periph = kzalloc(sizeof(*periph), GFP_KERNEL);
+	if (WARN_ON(!periph))
+		return;
+
+	periph->clk_ctrl = slcr_base + reg;
+	spin_lock_init(&periph->clkact_lock);
+
+	init.name = np->name;
+	init.ops = &zynq_periph_clk_ops;
+	for (i = 0; i < ARRAY_SIZE(parent_names); i++)
+		parent_names[i] = of_clk_get_parent_name(np, i);
+	init.parent_names = parent_names;
+	init.num_parents = ARRAY_SIZE(parent_names);
+
+	periph->hw.init = &init;
+
+	clk = clk_register(NULL, &periph->hw);
+	if (WARN_ON(IS_ERR(clk)))
+		return;
+
+	err = of_clk_add_provider(np, of_clk_src_simple_get, clk);
+	if (WARN_ON(err))
+		return;
+
+	err = of_property_read_string_index(np, "clock-output-names", 0,
+					    &name);
+	if (WARN_ON(err))
+		return;
+
+	periph->gates[0] = clk_register_gate(NULL, name, np->name, 0,
+					     periph->clk_ctrl, 0, 0,
+					     &periph->clkact_lock);
+	if (WARN_ON(IS_ERR(periph->gates[0])))
+		return;
+	clk_num++;
+
+	/* some periph clks have 2 downstream gates */
+	err = of_property_read_string_index(np, "clock-output-names", 1,
+					    &name);
+	if (err != -ENODATA) {
+		periph->gates[1] = clk_register_gate(NULL, name, np->name, 0,
+						     periph->clk_ctrl, 1, 0,
+						     &periph->clkact_lock);
+		if (WARN_ON(IS_ERR(periph->gates[1])))
+			return;
+		clk_num++;
+	}
+
+	periph->onecell_data.clks = periph->gates;
+	periph->onecell_data.clk_num = clk_num;
+
+	err = of_clk_add_provider(np, of_clk_src_onecell_get,
+				  &periph->onecell_data);
+	if (WARN_ON(err))
+		return;
+}
+
+/* CPU Clock domain is modelled as a mux with 4 children subclks, whose
+ * derivative rates depend on CLK_621_TRUE
+ */
+
+struct zynq_cpu_clk {
+	struct clk_hw		hw;
+	struct clk_onecell_data	onecell_data;
+	struct clk		*subclks[4];
+	void __iomem		*clk_ctrl;
+	spinlock_t		clkact_lock;
+};
+
+#define to_zynq_cpu_clk(hw)	container_of(hw, struct zynq_cpu_clk, hw)
+
+static const u8 zynq_cpu_clk_parent_map[] = {
+	1, 1, 2, 0
+};
+#define CPU_CLK_SRCSEL(x)	(zynq_cpu_clk_parent_map[(((x) & 0x30) >> 4)])
+#define CPU_CLK_CTRL_DIV(x)	(((x) & 0x3F00) >> 8)
+
+static u8 zynq_cpu_clk_get_parent(struct clk_hw *hw)
+{
+	struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw);
+	return CPU_CLK_SRCSEL(ioread32(cpuclk->clk_ctrl));
+}
+
+static unsigned long zynq_cpu_clk_recalc_rate(struct clk_hw *hw,
+					      unsigned long parent_rate)
+{
+	struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw);
+	return parent_rate / CPU_CLK_CTRL_DIV(ioread32(cpuclk->clk_ctrl));
+}
+
+static const struct clk_ops zynq_cpu_clk_ops = {
+	.get_parent	= zynq_cpu_clk_get_parent,
+	.recalc_rate	= zynq_cpu_clk_recalc_rate,
+};
+
+struct zynq_cpu_subclk {
+	struct clk_hw	hw;
+	void __iomem	*clk_621;
+	enum {
+		CPU_SUBCLK_6X4X,
+		CPU_SUBCLK_3X2X,
+		CPU_SUBCLK_2X,
+		CPU_SUBCLK_1X,
+	} which;
+};
+
+#define CLK_621_TRUE(x)	((x) & 1)
+
+#define to_zynq_cpu_subclk(hw)	container_of(hw, struct zynq_cpu_subclk, hw);
+
+static unsigned long zynq_cpu_subclk_recalc_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	unsigned long uninitialized_var(rate);
+	struct zynq_cpu_subclk *subclk;
+	bool is_621;
+
+	subclk = to_zynq_cpu_subclk(hw)
+	is_621 = CLK_621_TRUE(ioread32(subclk->clk_621));
+
+	switch (subclk->which) {
+	case CPU_SUBCLK_6X4X:
+		rate = parent_rate;
+		break;
+	case CPU_SUBCLK_3X2X:
+		rate = parent_rate / 2;
+		break;
+	case CPU_SUBCLK_2X:
+		rate = parent_rate / (is_621 ? 3 : 2);
+		break;
+	case CPU_SUBCLK_1X:
+		rate = parent_rate / (is_621 ? 6 : 4);
+		break;
+	};
+
+	return rate;
+}
+
+static const struct clk_ops zynq_cpu_subclk_ops = {
+	.recalc_rate	= zynq_cpu_subclk_recalc_rate,
+};
+
+static struct clk *zynq_cpu_subclk_setup(struct device_node *np, u8 which,
+					 void __iomem *clk_621)
+{
+	struct zynq_cpu_subclk *subclk;
+	struct clk_init_data init;
+	struct clk *clk;
+	int err;
+
+	err = of_property_read_string_index(np, "clock-output-names",
+					    which, &init.name);
+	if (WARN_ON(err))
+		goto err_read_output_name;
+
+	subclk = kzalloc(sizeof(*subclk), GFP_KERNEL);
+	if (!subclk)
+		goto err_subclk_alloc;
+
+	subclk->clk_621 = clk_621;
+	subclk->which = which;
+
+	init.ops = &zynq_cpu_subclk_ops;
+	init.parent_names = &np->name;
+	init.num_parents = 1;
+
+	subclk->hw.init = &init;
+
+	clk = clk_register(NULL, &subclk->hw);
+	if (WARN_ON(IS_ERR(clk)))
+		goto err_clk_register;
+
+	return clk;
+
+err_clk_register:
+	kfree(subclk);
+err_subclk_alloc:
+err_read_output_name:
+	return ERR_PTR(-EINVAL);
+}
+
+static void __init zynq_cpu_clk_setup(struct device_node *np)
+{
+	struct zynq_cpu_clk *cpuclk;
+	const char *parent_names[3];
+	struct clk_init_data init;
+	void __iomem *clk_621;
+	struct clk *clk;
+	u32 reg[2];
+	int err;
+	int i;
+
+	err = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg));
+	if (WARN_ON(err))
+		return;
+
+	cpuclk = kzalloc(sizeof(*cpuclk), GFP_KERNEL);
+	if (WARN_ON(!cpuclk))
+		return;
+
+	cpuclk->clk_ctrl = slcr_base + reg[0];
+	clk_621 = slcr_base + reg[1];
+	spin_lock_init(&cpuclk->clkact_lock);
+
+	init.name = np->name;
+	init.ops = &zynq_cpu_clk_ops;
+	for (i = 0; i < ARRAY_SIZE(parent_names); i++)
+		parent_names[i] = of_clk_get_parent_name(np, i);
+	init.parent_names = parent_names;
+	init.num_parents = ARRAY_SIZE(parent_names);
+
+	cpuclk->hw.init = &init;
+
+	clk = clk_register(NULL, &cpuclk->hw);
+	if (WARN_ON(IS_ERR(clk)))
+		return;
+
+	err = of_clk_add_provider(np, of_clk_src_simple_get, clk);
+	if (WARN_ON(err))
+		return;
+
+	for (i = 0; i < 4; i++) {
+		cpuclk->subclks[i] = zynq_cpu_subclk_setup(np, i, clk_621);
+		if (WARN_ON(IS_ERR(cpuclk->subclks[i])))
+			return;
+	}
+
+	cpuclk->onecell_data.clks = cpuclk->subclks;
+	cpuclk->onecell_data.clk_num = i;
+
+	err = of_clk_add_provider(np, of_clk_src_onecell_get,
+				  &cpuclk->onecell_data);
+	if (WARN_ON(err))
+		return;
+}
+
+static const __initconst struct of_device_id zynq_clk_match[] = {
+	{ .compatible = "fixed-clock", .data = of_fixed_clk_setup, },
+	{ .compatible = "xlnx,zynq-pll", .data = zynq_pll_clk_setup, },
+	{ .compatible = "xlnx,zynq-periph-clock",
+		.data = zynq_periph_clk_setup, },
+	{ .compatible = "xlnx,zynq-cpu-clock", .data = zynq_cpu_clk_setup, },
+	{}
+};
+
+void __init xilinx_zynq_clocks_init(void __iomem *slcr)
+{
+	slcr_base = slcr;
+	of_clk_init(zynq_clk_match);
+}

include/linux/clk/zynq.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2012 National Instruments
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __LINUX_CLK_ZYNQ_H_
+#define __LINUX_CLK_ZYNQ_H_
+
+void __init xilinx_zynq_clocks_init(void __iomem *slcr);
+
+#endif