[ARM] pxa: add base support for Marvell's PXA168 processor line

"""The Marvell® PXA168 processor is the first in a family of application
processors targeted at mass market opportunities in computing and consumer
devices. It balances high computing and multimedia performance with low
power consumption to support extended battery life, and includes a wealth
of integrated peripherals to reduce overall BOM cost .... """

See http://www.marvell.com/featured/pxa168.jsp for more information.

  1. Marvell Mohawk core is a hybrid of xscale3 and its own ARM core,
     there are many enhancements like instructions for flushing the
     whole D-cache, and so on

  2. Clock reuses Russell's common clkdev, and added the basic support
     for UART1/2.

  3. Devices are a bit different from the 'mach-pxa' way, the platform
     devices are now dynamically allocated only when necessary (i.e.
     when pxa_register_device() is called). Description for each device
     are stored in an array of 'struct pxa_device_desc'. Now that:

     a. this array of device description is marked with __initdata and
        can be freed up system is fully up

     b. which means board code has to add all needed devices early in
        his initializing function

     c. platform specific data can now be marked as __initdata since
        they are allocated and copied by platform_device_add_data()

  4. only the basic UART1/2/3 are added, more devices will come later.

Signed-off-by: Jason Chagas <chagas@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

32 files changed, 1194 insertions, 0 deletions

diff --git a/arch/arm/mach-mmp/Kconfig b/arch/arm/mach-mmp/Kconfig
new file mode 100644
index 000000000000..b52326763556
--- /dev/null
+++ b/arch/arm/mach-mmp/Kconfig
@@ -0,0 +1,27 @@
+if ARCH_MMP
+
+menu "Marvell PXA168 Implmentations"
+
+config MACH_ASPENITE
+        bool "Marvell's PXA168 Aspenite Development Board"
+        select CPU_PXA168
+        help
+          Say 'Y' here if you want to support the Marvell PXA168-based
+          Aspenite Development Board.
+
+config MACH_ZYLONITE2
+        bool "Marvell's PXA168 Zylonite2 Development Board"
+        select CPU_PXA168
+        help
+          Say 'Y' here if you want to support the Marvell PXA168-based
+          Zylonite2 Development Board.
+
+endmenu
+
+config CPU_PXA168
+        bool
+        select CPU_MOHAWK
+        help
+          Select code specific to PXA168
+
+endif
diff --git a/arch/arm/mach-mmp/Makefile b/arch/arm/mach-mmp/Makefile
new file mode 100644
index 000000000000..0ac7644ec99d
--- /dev/null
+++ b/arch/arm/mach-mmp/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for Marvell's PXA168 processors line
+#
+
+obj-y                           += common.o clock.o devices.o irq.o time.o
+
+# SoC support
+obj-$(CONFIG_CPU_PXA168)        += pxa168.o
+
+# board support
+obj-$(CONFIG_MACH_ASPENITE)     += aspenite.o
+obj-$(CONFIG_MACH_ZYLONITE2)    += aspenite.o
diff --git a/arch/arm/mach-mmp/Makefile.boot b/arch/arm/mach-mmp/Makefile.boot
new file mode 100644
index 000000000000..574a4aa8321a
--- /dev/null
+++ b/arch/arm/mach-mmp/Makefile.boot
@@ -0,0 +1 @@
+   zreladdr-y   := 0x00008000
diff --git a/arch/arm/mach-mmp/aspenite.c b/arch/arm/mach-mmp/aspenite.c
new file mode 100644
index 000000000000..e8caf58e004c
--- /dev/null
+++ b/arch/arm/mach-mmp/aspenite.c
@@ -0,0 +1,42 @@
+/*
+ *  linux/arch/arm/mach-mmp/aspenite.c
+ *
+ *  Support for the Marvell PXA168-based Aspenite and Zylonite2
+ *  Development Platform.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  publishhed by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/addr-map.h>
+
+#include "common.h"
+
+static void __init common_init(void)
+{
+}
+
+MACHINE_START(ASPENITE, "PXA168-based Aspenite Development Platform")
+        .phys_io        = APB_PHYS_BASE,
+        .boot_params    = 0x00000100,
+        .io_pg_offst    = (APB_VIRT_BASE >> 18) & 0xfffc,
+        .map_io         = pxa_map_io,
+        .init_irq       = pxa168_init_irq,
+        .timer          = &pxa168_timer,
+        .init_machine   = common_init,
+MACHINE_END
+
+MACHINE_START(ZYLONITE2, "PXA168-based Zylonite2 Development Platform")
+        .phys_io        = APB_PHYS_BASE,
+        .boot_params    = 0x00000100,
+        .io_pg_offst    = (APB_VIRT_BASE >> 18) & 0xfffc,
+        .map_io         = pxa_map_io,
+        .init_irq       = pxa168_init_irq,
+        .timer          = &pxa168_timer,
+        .init_machine   = common_init,
+MACHINE_END
diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
new file mode 100644
index 000000000000..2d9cc5a7122f
--- /dev/null
+++ b/arch/arm/mach-mmp/clock.c
@@ -0,0 +1,83 @@
+/*
+ *  linux/arch/arm/mach-mmp/clock.c
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/regs-apbc.h>
+#include "clock.h"
+
+static void apbc_clk_enable(struct clk *clk)
+{
+        uint32_t clk_rst;
+
+        clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(clk->fnclksel);
+        __raw_writel(clk_rst, clk->clk_rst);
+}
+
+static void apbc_clk_disable(struct clk *clk)
+{
+        __raw_writel(0, clk->clk_rst);
+}
+
+struct clkops apbc_clk_ops = {
+        .enable         = apbc_clk_enable,
+        .disable        = apbc_clk_disable,
+};
+
+static DEFINE_SPINLOCK(clocks_lock);
+
+int clk_enable(struct clk *clk)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&clocks_lock, flags);
+        if (clk->enabled++ == 0)
+                clk->ops->enable(clk);
+        spin_unlock_irqrestore(&clocks_lock, flags);
+        return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+        unsigned long flags;
+
+        WARN_ON(clk->enabled == 0);
+
+        spin_lock_irqsave(&clocks_lock, flags);
+        if (--clk->enabled == 0)
+                clk->ops->disable(clk);
+        spin_unlock_irqrestore(&clocks_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        unsigned long rate;
+
+        if (clk->ops->getrate)
+                rate = clk->ops->getrate(clk);
+        else
+                rate = clk->rate;
+
+        return rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clks_register(struct clk_lookup *clks, size_t num)
+{
+        int i;
+
+        for (i = 0; i < num; i++)
+                clkdev_add(&clks[i]);
+}
diff --git a/arch/arm/mach-mmp/clock.h b/arch/arm/mach-mmp/clock.h
new file mode 100644
index 000000000000..ed967e78e6a8
--- /dev/null
+++ b/arch/arm/mach-mmp/clock.h
@@ -0,0 +1,71 @@
+/*
+ *  linux/arch/arm/mach-mmp/clock.h
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <asm/clkdev.h>
+
+struct clkops {
+        void                    (*enable)(struct clk *);
+        void                    (*disable)(struct clk *);
+        unsigned long           (*getrate)(struct clk *);
+};
+
+struct clk {
+        const struct clkops     *ops;
+
+        void __iomem    *clk_rst;       /* clock reset control register */
+        int             fnclksel;       /* functional clock select (APBC) */
+        uint32_t        enable_val;     /* value for clock enable (APMU) */
+        unsigned long   rate;
+        int             enabled;
+};
+
+extern struct clkops apbc_clk_ops;
+
+#define APBC_CLK(_name, _reg, _fnclksel, _rate)                 \
+struct clk clk_##_name = {                                      \
+                .clk_rst        = (void __iomem *)APBC_##_reg,  \
+                .fnclksel       = _fnclksel,                    \
+                .rate           = _rate,                        \
+                .ops            = &apbc_clk_ops,                \
+}
+
+#define APBC_CLK_OPS(_name, _reg, _fnclksel, _rate, _ops)       \
+struct clk clk_##_name = {                                      \
+                .clk_rst        = (void __iomem *)APBC_##_reg,  \
+                .fnclksel       = _fnclksel,                    \
+                .rate           = _rate,                        \
+                .ops            = _ops,                         \
+}
+
+#define APMU_CLK(_name, _reg, _eval, _rate)                     \
+struct clk clk_##_name = {                                      \
+                .clk_rst        = (void __iomem *)APMU_##_reg,  \
+                .enable_val     = _eval,                        \
+                .rate           = _rate,                        \
+                .ops            = &apmu_clk_ops,                \
+}
+
+#define APMU_CLK_OPS(_name, _reg, _eval, _rate, _ops)           \
+struct clk clk_##_name = {                                      \
+                .clk_rst        = (void __iomem *)APMU_##_reg,  \
+                .enable_val     = _eval,                        \
+                .rate           = _rate,                        \
+                .ops            = _ops,                         \
+}
+
+#define INIT_CLKREG(_clk, _devname, _conname)                   \
+        {                                                       \
+                .clk            = _clk,                         \
+                .dev_id         = _devname,                     \
+                .con_id         = _conname,                     \
+        }
+
+extern struct clk clk_pxa168_gpio;
+extern struct clk clk_pxa168_timers;
+
+extern void clks_register(struct clk_lookup *, size_t);
diff --git a/arch/arm/mach-mmp/common.c b/arch/arm/mach-mmp/common.c
new file mode 100644
index 000000000000..e1e66c18b446
--- /dev/null
+++ b/arch/arm/mach-mmp/common.c
@@ -0,0 +1,37 @@
+/*
+ *  linux/arch/arm/mach-mmp/common.c
+ *
+ *  Code common to PXA168 processor lines
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/page.h>
+#include <asm/mach/map.h>
+#include <mach/addr-map.h>
+
+#include "common.h"
+
+static struct map_desc standard_io_desc[] __initdata = {
+        {
+                .pfn            = __phys_to_pfn(APB_PHYS_BASE),
+                .virtual        = APB_VIRT_BASE,
+                .length         = APB_PHYS_SIZE,
+                .type           = MT_DEVICE,
+        }, {
+                .pfn            = __phys_to_pfn(AXI_PHYS_BASE),
+                .virtual        = AXI_VIRT_BASE,
+                .length         = AXI_PHYS_SIZE,
+                .type           = MT_DEVICE,
+        },
+};
+
+void __init pxa_map_io(void)
+{
+        iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
+}
diff --git a/arch/arm/mach-mmp/common.h b/arch/arm/mach-mmp/common.h
new file mode 100644
index 000000000000..bf7a6a492de6
--- /dev/null
+++ b/arch/arm/mach-mmp/common.h
@@ -0,0 +1,11 @@
+#define ARRAY_AND_SIZE(x)       (x), ARRAY_SIZE(x)
+
+struct sys_timer;
+
+extern void timer_init(int irq);
+
+extern struct sys_timer pxa168_timer;
+extern void __init pxa168_init_irq(void);
+
+extern void __init icu_init_irq(void);
+extern void __init pxa_map_io(void);
diff --git a/arch/arm/mach-mmp/devices.c b/arch/arm/mach-mmp/devices.c
new file mode 100644
index 000000000000..191d9dea8731
--- /dev/null
+++ b/arch/arm/mach-mmp/devices.c
@@ -0,0 +1,69 @@
+/*
+ * linux/arch/arm/mach-mmp/devices.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/irq.h>
+#include <mach/devices.h>
+
+int __init pxa_register_device(struct pxa_device_desc *desc,
+                                void *data, size_t size)
+{
+        struct platform_device *pdev;
+        struct resource res[2 + MAX_RESOURCE_DMA];
+        int i, ret = 0, nres = 0;
+
+        pdev = platform_device_alloc(desc->drv_name, desc->id);
+        if (pdev == NULL)
+                return -ENOMEM;
+
+        pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
+        memset(res, 0, sizeof(res));
+
+        if (desc->start != -1ul && desc->size > 0) {
+                res[nres].start = desc->start;
+                res[nres].end   = desc->start + desc->size - 1;
+                res[nres].flags = IORESOURCE_MEM;
+                nres++;
+        }
+
+        if (desc->irq != NO_IRQ) {
+                res[nres].start = desc->irq;
+                res[nres].end   = desc->irq;
+                res[nres].flags = IORESOURCE_IRQ;
+                nres++;
+        }
+
+        for (i = 0; i < MAX_RESOURCE_DMA; i++, nres++) {
+                if (desc->dma[i] == 0)
+                        break;
+
+                res[nres].start = desc->dma[i];
+                res[nres].end   = desc->dma[i];
+                res[nres].flags = IORESOURCE_DMA;
+        }
+
+        ret = platform_device_add_resources(pdev, res, nres);
+        if (ret) {
+                platform_device_put(pdev);
+                return ret;
+        }
+
+        if (data && size) {
+                ret = platform_device_add_data(pdev, data, size);
+                if (ret) {
+                        platform_device_put(pdev);
+                        return ret;
+                }
+        }
+
+        return platform_device_add(pdev);
+}
diff --git a/arch/arm/mach-mmp/include/mach/addr-map.h b/arch/arm/mach-mmp/include/mach/addr-map.h
new file mode 100644
index 000000000000..3254089a644d
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/addr-map.h
@@ -0,0 +1,34 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/addr-map.h
+ *
+ *   Common address map definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_ADDR_MAP_H
+#define __ASM_MACH_ADDR_MAP_H
+
+/* APB - Application Subsystem Peripheral Bus
+ *
+ * NOTE: the DMA controller registers are actually on the AXI fabric #1
+ * slave port to AHB/APB bridge, due to its close relationship to those
+ * peripherals on APB, let's count it into the ABP mapping area.
+ */
+#define APB_PHYS_BASE           0xd4000000
+#define APB_VIRT_BASE           0xfe000000
+#define APB_PHYS_SIZE           0x00200000
+
+#define AXI_PHYS_BASE           0xd4200000
+#define AXI_VIRT_BASE           0xfe200000
+#define AXI_PHYS_SIZE           0x00200000
+
+/* Static Memory Controller - Chip Select 0 and 1 */
+#define SMC_CS0_PHYS_BASE       0x80000000
+#define SMC_CS0_PHYS_SIZE       0x10000000
+#define SMC_CS1_PHYS_BASE       0x90000000
+#define SMC_CS1_PHYS_SIZE       0x10000000
+
+#endif /* __ASM_MACH_ADDR_MAP_H */
diff --git a/arch/arm/mach-mmp/include/mach/clkdev.h b/arch/arm/mach-mmp/include/mach/clkdev.h
new file mode 100644
index 000000000000..2fb354e54e0d
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif /* __ASM_MACH_CLKDEV_H */
diff --git a/arch/arm/mach-mmp/include/mach/cputype.h b/arch/arm/mach-mmp/include/mach/cputype.h
new file mode 100644
index 000000000000..4ceed7a50755
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/cputype.h
@@ -0,0 +1,21 @@
+#ifndef __ASM_MACH_CPUTYPE_H
+#define __ASM_MACH_CPUTYPE_H
+
+#include <asm/cputype.h>
+
+/*
+ *  CPU   Stepping   OLD_ID       CPU_ID      CHIP_ID
+ *
+ * PXA168    A0    0x41159263   0x56158400   0x00A0A333
+ */
+
+#ifdef CONFIG_CPU_PXA168
+#  define __cpu_is_pxa168(id)   \
+        ({ unsigned int _id = ((id) >> 8) & 0xff; _id == 0x84; })
+#else
+#  define __cpu_is_pxa168(id)   (0)
+#endif
+
+#define cpu_is_pxa168()         ({ __cpu_is_pxa168(read_cpuid_id()); })
+
+#endif /* __ASM_MACH_CPUTYPE_H */
diff --git a/arch/arm/mach-mmp/include/mach/debug-macro.S b/arch/arm/mach-mmp/include/mach/debug-macro.S
new file mode 100644
index 000000000000..a850f87de51d
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/debug-macro.S
@@ -0,0 +1,23 @@
+/* arch/arm/mach-mmp/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copied from arch/arm/mach-pxa/include/mach/debug.S
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <mach/addr-map.h>
+
+                .macro  addruart,rx
+                mrc     p15, 0, \rx, c1, c0
+                tst     \rx, #1                         @ MMU enabled?
+                ldreq   \rx, =APB_PHYS_BASE             @ physical
+                ldrne   \rx, =APB_VIRT_BASE             @ virtual
+                orr     \rx, \rx, #0x00017000
+                .endm
+
+#define UART_SHIFT      2
+#include <asm/hardware/debug-8250.S>
diff --git a/arch/arm/mach-mmp/include/mach/devices.h b/arch/arm/mach-mmp/include/mach/devices.h
new file mode 100644
index 000000000000..bc03388d5fde
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/devices.h
@@ -0,0 +1,27 @@
+#include <linux/types.h>
+
+#define MAX_RESOURCE_DMA        2
+
+/* structure for describing the on-chip devices */
+struct pxa_device_desc {
+        const char      *dev_name;
+        const char      *drv_name;
+        int             id;
+        int             irq;
+        unsigned long   start;
+        unsigned long   size;
+        int             dma[MAX_RESOURCE_DMA];
+};
+
+#define PXA168_DEVICE(_name, _drv, _id, _irq, _start, _size, _dma...)   \
+struct pxa_device_desc pxa168_device_##_name __initdata = {             \
+        .dev_name       = "pxa168-" #_name,                             \
+        .drv_name       = _drv,                                         \
+        .id             = _id,                                          \
+        .irq            = IRQ_PXA168_##_irq,                            \
+        .start          = _start,                                       \
+        .size           = _size,                                        \
+        .dma            = { _dma },                                     \
+};
+
+extern int pxa_register_device(struct pxa_device_desc *, void *, size_t);
diff --git a/arch/arm/mach-mmp/include/mach/dma.h b/arch/arm/mach-mmp/include/mach/dma.h
new file mode 100644
index 000000000000..1d6914544da4
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/dma.h
@@ -0,0 +1,13 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/dma.h
+ */
+
+#ifndef __ASM_MACH_DMA_H
+#define __ASM_MACH_DMA_H
+
+#include <mach/addr-map.h>
+
+#define DMAC_REGS_VIRT  (APB_VIRT_BASE + 0x00000)
+
+#include <plat/dma.h>
+#endif /* __ASM_MACH_DMA_H */
diff --git a/arch/arm/mach-mmp/include/mach/entry-macro.S b/arch/arm/mach-mmp/include/mach/entry-macro.S
new file mode 100644
index 000000000000..6d3cd35478b5
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/entry-macro.S
@@ -0,0 +1,25 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/entry-macro.S
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <mach/regs-icu.h>
+
+        .macro  disable_fiq
+        .endm
+
+        .macro  arch_ret_to_user, tmp1, tmp2
+        .endm
+
+        .macro  get_irqnr_preamble, base, tmp
+        ldr     \base, =ICU_AP_IRQ_SEL_INT_NUM
+        .endm
+
+        .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+        ldr     \tmp, [\base, #0]
+        and     \irqnr, \tmp, #0x3f
+        tst     \tmp, #(1 << 6)
+        .endm
diff --git a/arch/arm/mach-mmp/include/mach/hardware.h b/arch/arm/mach-mmp/include/mach/hardware.h
new file mode 100644
index 000000000000..99264a5ce5e4
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/hardware.h
@@ -0,0 +1,4 @@
+#ifndef __ASM_MACH_HARDWARE_H
+#define __ASM_MACH_HARDWARE_H
+
+#endif /* __ASM_MACH_HARDWARE_H */
diff --git a/arch/arm/mach-mmp/include/mach/io.h b/arch/arm/mach-mmp/include/mach/io.h
new file mode 100644
index 000000000000..e7adf3d012c1
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/io.h
@@ -0,0 +1,21 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/io.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_IO_H
+#define __ASM_MACH_IO_H
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/*
+ * We don't actually have real ISA nor PCI buses, but there is so many
+ * drivers out there that might just work if we fake them...
+ */
+#define __io(a)         __typesafe_io(a)
+#define __mem_pci(a)    (a)
+
+#endif /* __ASM_MACH_IO_H */
diff --git a/arch/arm/mach-mmp/include/mach/irqs.h b/arch/arm/mach-mmp/include/mach/irqs.h
new file mode 100644
index 000000000000..91ecb3fbca06
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/irqs.h
@@ -0,0 +1,58 @@
+#ifndef __ASM_MACH_IRQS_H
+#define __ASM_MACH_IRQS_H
+
+/*
+ * Interrupt numbers for PXA168
+ */
+#define IRQ_PXA168_NONE                 (-1)
+#define IRQ_PXA168_SSP3                 0
+#define IRQ_PXA168_SSP2                 1
+#define IRQ_PXA168_SSP1                 2
+#define IRQ_PXA168_SSP0                 3
+#define IRQ_PXA168_PMIC_INT             4
+#define IRQ_PXA168_RTC_INT              5
+#define IRQ_PXA168_RTC_ALARM            6
+#define IRQ_PXA168_TWSI0                7
+#define IRQ_PXA168_GPU                  8
+#define IRQ_PXA168_KEYPAD               9
+#define IRQ_PXA168_ONEWIRE              12
+#define IRQ_PXA168_TIMER1               13
+#define IRQ_PXA168_TIMER2               14
+#define IRQ_PXA168_TIMER3               15
+#define IRQ_PXA168_CMU                  16
+#define IRQ_PXA168_SSP4                 17
+#define IRQ_PXA168_MSP_WAKEUP           19
+#define IRQ_PXA168_CF_WAKEUP            20
+#define IRQ_PXA168_XD_WAKEUP            21
+#define IRQ_PXA168_MFU                  22
+#define IRQ_PXA168_MSP                  23
+#define IRQ_PXA168_CF                   24
+#define IRQ_PXA168_XD                   25
+#define IRQ_PXA168_DDR_INT              26
+#define IRQ_PXA168_UART1                27
+#define IRQ_PXA168_UART2                28
+#define IRQ_PXA168_WDT                  35
+#define IRQ_PXA168_FRQ_CHANGE           38
+#define IRQ_PXA168_SDH1                 39
+#define IRQ_PXA168_SDH2                 40
+#define IRQ_PXA168_LCD                  41
+#define IRQ_PXA168_CI                   42
+#define IRQ_PXA168_USB1                 44
+#define IRQ_PXA168_NAND                 45
+#define IRQ_PXA168_HIFI_DMA             46
+#define IRQ_PXA168_DMA_INT0             47
+#define IRQ_PXA168_DMA_INT1             48
+#define IRQ_PXA168_GPIOX                49
+#define IRQ_PXA168_USB2                 51
+#define IRQ_PXA168_AC97                 57
+#define IRQ_PXA168_TWSI1                58
+#define IRQ_PXA168_PMU                  60
+#define IRQ_PXA168_SM_INT               63
+
+#define IRQ_GPIO_START                  64
+#define IRQ_GPIO_NUM                    128
+#define IRQ_GPIO(x)                     (IRQ_GPIO_START + (x))
+
+#define NR_IRQS         (IRQ_GPIO_START + IRQ_GPIO_NUM)
+
+#endif /* __ASM_MACH_IRQS_H */
diff --git a/arch/arm/mach-mmp/include/mach/memory.h b/arch/arm/mach-mmp/include/mach/memory.h
new file mode 100644
index 000000000000..bdb21d70714c
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/memory.h
@@ -0,0 +1,14 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/memory.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_MEMORY_H
+#define __ASM_MACH_MEMORY_H
+
+#define PHYS_OFFSET     UL(0x00000000)
+
+#endif /* __ASM_MACH_MEMORY_H */
diff --git a/arch/arm/mach-mmp/include/mach/pxa168.h b/arch/arm/mach-mmp/include/mach/pxa168.h
new file mode 100644
index 000000000000..ef0a8a2076e9
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/pxa168.h
@@ -0,0 +1,23 @@
+#ifndef __ASM_MACH_PXA168_H
+#define __ASM_MACH_PXA168_H
+
+#include <mach/devices.h>
+
+extern struct pxa_device_desc pxa168_device_uart1;
+extern struct pxa_device_desc pxa168_device_uart2;
+
+static inline int pxa168_add_uart(int id)
+{
+        struct pxa_device_desc *d = NULL;
+
+        switch (id) {
+        case 1: d = &pxa168_device_uart1; break;
+        case 2: d = &pxa168_device_uart2; break;
+        }
+
+        if (d == NULL)
+                return -EINVAL;
+
+        return pxa_register_device(d, NULL, 0);
+}
+#endif /* __ASM_MACH_PXA168_H */
diff --git a/arch/arm/mach-mmp/include/mach/regs-apbc.h b/arch/arm/mach-mmp/include/mach/regs-apbc.h
new file mode 100644
index 000000000000..e0ffae594873
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/regs-apbc.h
@@ -0,0 +1,53 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/regs-apbc.h
+ *
+ *   Application Peripheral Bus Clock Unit
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_REGS_APBC_H
+#define __ASM_MACH_REGS_APBC_H
+
+#include <mach/addr-map.h>
+
+#define APBC_VIRT_BASE  (APB_VIRT_BASE + 0x015000)
+#define APBC_REG(x)     (APBC_VIRT_BASE + (x))
+
+/*
+ * APB clock register offsets for PXA168
+ */
+#define APBC_PXA168_UART1       APBC_REG(0x000)
+#define APBC_PXA168_UART2       APBC_REG(0x004)
+#define APBC_PXA168_GPIO        APBC_REG(0x008)
+#define APBC_PXA168_PWM0        APBC_REG(0x00c)
+#define APBC_PXA168_PWM1        APBC_REG(0x010)
+#define APBC_PXA168_SSP1        APBC_REG(0x01c)
+#define APBC_PXA168_SSP2        APBC_REG(0x020)
+#define APBC_PXA168_RTC         APBC_REG(0x028)
+#define APBC_PXA168_TWSI0       APBC_REG(0x02c)
+#define APBC_PXA168_KPC         APBC_REG(0x030)
+#define APBC_PXA168_TIMERS      APBC_REG(0x034)
+#define APBC_PXA168_AIB         APBC_REG(0x03c)
+#define APBC_PXA168_SW_JTAG     APBC_REG(0x040)
+#define APBC_PXA168_ONEWIRE     APBC_REG(0x048)
+#define APBC_PXA168_SSP3        APBC_REG(0x04c)
+#define APBC_PXA168_ASFAR       APBC_REG(0x050)
+#define APBC_PXA168_ASSAR       APBC_REG(0x054)
+#define APBC_PXA168_SSP4        APBC_REG(0x058)
+#define APBC_PXA168_SSP5        APBC_REG(0x05c)
+#define APBC_PXA168_TWSI1       APBC_REG(0x06c)
+#define APBC_PXA168_UART3       APBC_REG(0x070)
+#define APBC_PXA168_AC97        APBC_REG(0x084)
+
+/* Common APB clock register bit definitions */
+#define APBC_APBCLK     (1 << 0)  /* APB Bus Clock Enable */
+#define APBC_FNCLK      (1 << 1)  /* Functional Clock Enable */
+#define APBC_RST        (1 << 2)  /* Reset Generation */
+
+/* Functional Clock Selection Mask */
+#define APBC_FNCLKSEL(x)        (((x) & 0xf) << 4)
+
+#endif /* __ASM_MACH_REGS_APBC_H */
diff --git a/arch/arm/mach-mmp/include/mach/regs-apmu.h b/arch/arm/mach-mmp/include/mach/regs-apmu.h
new file mode 100644
index 000000000000..919030514120
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/regs-apmu.h
@@ -0,0 +1,36 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/regs-apmu.h
+ *
+ *   Application Subsystem Power Management Unit
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_REGS_APMU_H
+#define __ASM_MACH_REGS_APMU_H
+
+#include <mach/addr-map.h>
+
+#define APMU_VIRT_BASE  (AXI_VIRT_BASE + 0x82800)
+#define APMU_REG(x)     (APMU_VIRT_BASE + (x))
+
+/* Clock Reset Control */
+#define APMU_IRE        APMU_REG(0x048)
+#define APMU_LCD        APMU_REG(0x04c)
+#define APMU_CCIC       APMU_REG(0x050)
+#define APMU_SDH0       APMU_REG(0x054)
+#define APMU_SDH1       APMU_REG(0x058)
+#define APMU_USB        APMU_REG(0x05c)
+#define APMU_NAND       APMU_REG(0x060)
+#define APMU_DMA        APMU_REG(0x064)
+#define APMU_GEU        APMU_REG(0x068)
+#define APMU_BUS        APMU_REG(0x06c)
+
+#define APMU_FNCLK_EN   (1 << 4)
+#define APMU_AXICLK_EN  (1 << 3)
+#define APMU_FNRST_DIS  (1 << 1)
+#define APMU_AXIRST_DIS (1 << 0)
+
+#endif /* __ASM_MACH_REGS_APMU_H */
diff --git a/arch/arm/mach-mmp/include/mach/regs-icu.h b/arch/arm/mach-mmp/include/mach/regs-icu.h
new file mode 100644
index 000000000000..e5f08723e0cc
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/regs-icu.h
@@ -0,0 +1,31 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/regs-icu.h
+ *
+ *   Interrupt Control Unit
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_ICU_H
+#define __ASM_MACH_ICU_H
+
+#include <mach/addr-map.h>
+
+#define ICU_VIRT_BASE   (AXI_VIRT_BASE + 0x82000)
+#define ICU_REG(x)      (ICU_VIRT_BASE + (x))
+
+#define ICU_INT_CONF(n)         ICU_REG((n) << 2)
+#define ICU_INT_CONF_AP_INT     (1 << 6)
+#define ICU_INT_CONF_CP_INT     (1 << 5)
+#define ICU_INT_CONF_IRQ        (1 << 4)
+#define ICU_INT_CONF_MASK       (0xf)
+
+#define ICU_AP_FIQ_SEL_INT_NUM  ICU_REG(0x108)  /* AP FIQ Selected Interrupt */
+#define ICU_AP_IRQ_SEL_INT_NUM  ICU_REG(0x10C)  /* AP IRQ Selected Interrupt */
+#define ICU_AP_GBL_IRQ_MSK      ICU_REG(0x114)  /* AP Global Interrupt Mask */
+#define ICU_INT_STATUS_0        ICU_REG(0x128)  /* Interrupt Stuats 0 */
+#define ICU_INT_STATUS_1        ICU_REG(0x12C)  /* Interrupt Status 1 */
+
+#endif /* __ASM_MACH_ICU_H */
diff --git a/arch/arm/mach-mmp/include/mach/regs-timers.h b/arch/arm/mach-mmp/include/mach/regs-timers.h
new file mode 100644
index 000000000000..45589fec9fc7
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/regs-timers.h
@@ -0,0 +1,44 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/regs-timers.h
+ *
+ *   Timers Module
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_REGS_TIMERS_H
+#define __ASM_MACH_REGS_TIMERS_H
+
+#include <mach/addr-map.h>
+
+#define TIMERS1_VIRT_BASE       (APB_VIRT_BASE + 0x14000)
+#define TIMERS2_VIRT_BASE       (APB_VIRT_BASE + 0x16000)
+
+#define TMR_CCR         (0x0000)
+#define TMR_TN_MM(n, m) (0x0004 + ((n) << 3) + (((n) + (m)) << 2))
+#define TMR_CR(n)       (0x0028 + ((n) << 2))
+#define TMR_SR(n)       (0x0034 + ((n) << 2))
+#define TMR_IER(n)      (0x0040 + ((n) << 2))
+#define TMR_PLVR(n)     (0x004c + ((n) << 2))
+#define TMR_PLCR(n)     (0x0058 + ((n) << 2))
+#define TMR_WMER        (0x0064)
+#define TMR_WMR         (0x0068)
+#define TMR_WVR         (0x006c)
+#define TMR_WSR         (0x0070)
+#define TMR_ICR(n)      (0x0074 + ((n) << 2))
+#define TMR_WICR        (0x0080)
+#define TMR_CER         (0x0084)
+#define TMR_CMR         (0x0088)
+#define TMR_ILR(n)      (0x008c + ((n) << 2))
+#define TMR_WCR         (0x0098)
+#define TMR_WFAR        (0x009c)
+#define TMR_WSAR        (0x00A0)
+#define TMR_CVWR(n)     (0x00A4 + ((n) << 2))
+
+#define TMR_CCR_CS_0(x) (((x) & 0x3) << 0)
+#define TMR_CCR_CS_1(x) (((x) & 0x7) << 2)
+#define TMR_CCR_CS_2(x) (((x) & 0x3) << 5)
+
+#endif /* __ASM_MACH_REGS_TIMERS_H */
diff --git a/arch/arm/mach-mmp/include/mach/system.h b/arch/arm/mach-mmp/include/mach/system.h
new file mode 100644
index 000000000000..001edfefec19
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/system.h
@@ -0,0 +1,21 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/system.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MACH_SYSTEM_H
+#define __ASM_MACH_SYSTEM_H
+
+static inline void arch_idle(void)
+{
+        cpu_do_idle();
+}
+
+static inline void arch_reset(char mode)
+{
+        cpu_reset(0);
+}
+#endif /* __ASM_MACH_SYSTEM_H */
diff --git a/arch/arm/mach-mmp/include/mach/timex.h b/arch/arm/mach-mmp/include/mach/timex.h
new file mode 100644
index 000000000000..6cebbd0ca8f4
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/timex.h
@@ -0,0 +1,9 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/timex.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define CLOCK_TICK_RATE         3250000
diff --git a/arch/arm/mach-mmp/include/mach/uncompress.h b/arch/arm/mach-mmp/include/mach/uncompress.h
new file mode 100644
index 000000000000..c93d5fa5865c
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/uncompress.h
@@ -0,0 +1,41 @@
+/*
+ * arch/arm/mach-mmp/include/mach/uncompress.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/serial_reg.h>
+#include <mach/addr-map.h>
+
+#define UART1_BASE      (APB_PHYS_BASE + 0x36000)
+#define UART2_BASE      (APB_PHYS_BASE + 0x17000)
+#define UART3_BASE      (APB_PHYS_BASE + 0x18000)
+
+static inline void putc(char c)
+{
+        volatile unsigned long *UART = (unsigned long *)UART2_BASE;
+
+        /* UART enabled? */
+        if (!(UART[UART_IER] & UART_IER_UUE))
+                return;
+
+        while (!(UART[UART_LSR] & UART_LSR_THRE))
+                barrier();
+
+        UART[UART_TX] = c;
+}
+
+/*
+ * This does not append a newline
+ */
+static inline void flush(void)
+{
+}
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
diff --git a/arch/arm/mach-mmp/include/mach/vmalloc.h b/arch/arm/mach-mmp/include/mach/vmalloc.h
new file mode 100644
index 000000000000..b60ccaf9fee7
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/vmalloc.h
@@ -0,0 +1,5 @@
+/*
+ * linux/arch/arm/mach-mmp/include/mach/vmalloc.h
+ */
+
+#define VMALLOC_END     0xfe000000
diff --git a/arch/arm/mach-mmp/irq.c b/arch/arm/mach-mmp/irq.c
new file mode 100644
index 000000000000..52ff2f065eba
--- /dev/null
+++ b/arch/arm/mach-mmp/irq.c
@@ -0,0 +1,55 @@
+/*
+ *  linux/arch/arm/mach-mmp/irq.c
+ *
+ *  Generic IRQ handling, GPIO IRQ demultiplexing, etc.
+ *
+ *  Author:     Bin Yang <bin.yang@marvell.com>
+ *  Created:    Sep 30, 2008
+ *  Copyright:  Marvell International Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <mach/regs-icu.h>
+
+#include "common.h"
+
+#define IRQ_ROUTE_TO_AP         (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ)
+
+#define PRIORITY_DEFAULT        0x1
+#define PRIORITY_NONE           0x0     /* means IRQ disabled */
+
+static void icu_mask_irq(unsigned int irq)
+{
+        __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq));
+}
+
+static void icu_unmask_irq(unsigned int irq)
+{
+        __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq));
+}
+
+static struct irq_chip icu_irq_chip = {
+        .name   = "icu_irq",
+        .ack    = icu_mask_irq,
+        .mask   = icu_mask_irq,
+        .unmask = icu_unmask_irq,
+};
+
+void __init icu_init_irq(void)
+{
+        int irq;
+
+        for (irq = 0; irq < 64; irq++) {
+                icu_mask_irq(irq);
+                set_irq_chip(irq, &icu_irq_chip);
+                set_irq_handler(irq, handle_level_irq);
+                set_irq_flags(irq, IRQF_VALID);
+        }
+}
diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c
new file mode 100644
index 000000000000..1935c7545117
--- /dev/null
+++ b/arch/arm/mach-mmp/pxa168.c
@@ -0,0 +1,77 @@
+/*
+ *  linux/arch/arm/mach-mmp/pxa168.c
+ *
+ *  Code specific to PXA168
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+
+#include <asm/mach/time.h>
+#include <mach/addr-map.h>
+#include <mach/cputype.h>
+#include <mach/regs-apbc.h>
+#include <mach/irqs.h>
+#include <mach/dma.h>
+#include <mach/devices.h>
+
+#include "common.h"
+#include "clock.h"
+
+void __init pxa168_init_irq(void)
+{
+        icu_init_irq();
+}
+
+/* APB peripheral clocks */
+static APBC_CLK(uart1, PXA168_UART1, 1, 14745600);
+static APBC_CLK(uart2, PXA168_UART2, 1, 14745600);
+
+/* device and clock bindings */
+static struct clk_lookup pxa168_clkregs[] = {
+        INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
+        INIT_CLKREG(&clk_uart2, "pxa2xx-uart.1", NULL),
+};
+
+static int __init pxa168_init(void)
+{
+        if (cpu_is_pxa168()) {
+                pxa_init_dma(IRQ_PXA168_DMA_INT0, 32);
+                clks_register(ARRAY_AND_SIZE(pxa168_clkregs));
+        }
+
+        return 0;
+}
+postcore_initcall(pxa168_init);
+
+/* system timer - clock enabled, 3.25MHz */
+#define TIMER_CLK_RST   (APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(3))
+
+static void __init pxa168_timer_init(void)
+{
+        /* this is early, we have to initialize the CCU registers by
+         * ourselves instead of using clk_* API. Clock rate is defined
+         * by APBC_TIMERS_CLK_RST (3.25MHz) and enabled free-running
+         */
+        __raw_writel(APBC_APBCLK | APBC_RST, APBC_PXA168_TIMERS);
+
+        /* 3.25MHz, bus/functional clock enabled, release reset */
+        __raw_writel(TIMER_CLK_RST, APBC_PXA168_TIMERS);
+
+        timer_init(IRQ_PXA168_TIMER1);
+}
+
+struct sys_timer pxa168_timer = {
+        .init   = pxa168_timer_init,
+};
+
+/* on-chip devices */
+PXA168_DEVICE(uart1, "pxa2xx-uart", 0, UART1, 0xd4017000, 0x30, 21, 22);
+PXA168_DEVICE(uart2, "pxa2xx-uart", 1, UART2, 0xd4018000, 0x30, 23, 24);
diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c
new file mode 100644
index 000000000000..b03a6eda7419
--- /dev/null
+++ b/arch/arm/mach-mmp/time.c
@@ -0,0 +1,199 @@
+/*
+ * linux/arch/arm/mach-mmp/time.c
+ *
+ *   Support for clocksource and clockevents
+ *
+ * Copyright (C) 2008 Marvell International Ltd.
+ * All rights reserved.
+ *
+ *   2008-04-11: Jason Chagas <Jason.chagas@marvell.com>
+ *   2008-10-08: Bin Yang <bin.yang@marvell.com>
+ *
+ * The timers module actually includes three timers, each timer with upto
+ * three match comparators. Timer #0 is used here in free-running mode as
+ * the clock source, and match comparator #1 used as clock event device.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/clockchips.h>
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/cnt32_to_63.h>
+
+#include <mach/addr-map.h>
+#include <mach/regs-timers.h>
+#include <mach/irqs.h>
+
+#include "clock.h"
+
+#define TIMERS_VIRT_BASE        TIMERS1_VIRT_BASE
+
+#define MAX_DELTA               (0xfffffffe)
+#define MIN_DELTA               (16)
+
+#define TCR2NS_SCALE_FACTOR     10
+
+static unsigned long tcr2ns_scale;
+
+static void __init set_tcr2ns_scale(unsigned long tcr_rate)
+{
+        unsigned long long v = 1000000000ULL << TCR2NS_SCALE_FACTOR;
+        do_div(v, tcr_rate);
+        tcr2ns_scale = v;
+        /*
+         * We want an even value to automatically clear the top bit
+         * returned by cnt32_to_63() without an additional run time
+         * instruction. So if the LSB is 1 then round it up.
+         */
+        if (tcr2ns_scale & 1)
+                tcr2ns_scale++;
+}
+
+/*
+ * FIXME: the timer needs some delay to stablize the counter capture
+ */
+static inline uint32_t timer_read(void)
+{
+        int delay = 100;
+
+        __raw_writel(1, TIMERS_VIRT_BASE + TMR_CVWR(0));
+
+        while (delay--)
+                cpu_relax();
+
+        return __raw_readl(TIMERS_VIRT_BASE + TMR_CVWR(0));
+}
+
+unsigned long long sched_clock(void)
+{
+        unsigned long long v = cnt32_to_63(timer_read());
+        return (v * tcr2ns_scale) >> TCR2NS_SCALE_FACTOR;
+}
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+        struct clock_event_device *c = dev_id;
+
+        /* disable and clear pending interrupt status */
+        __raw_writel(0x0, TIMERS_VIRT_BASE + TMR_IER(0));
+        __raw_writel(0x1, TIMERS_VIRT_BASE + TMR_ICR(0));
+        c->event_handler(c);
+        return IRQ_HANDLED;
+}
+
+static int timer_set_next_event(unsigned long delta,
+                                struct clock_event_device *dev)
+{
+        unsigned long flags, next;
+
+        local_irq_save(flags);
+
+        /* clear pending interrupt status and enable */
+        __raw_writel(0x01, TIMERS_VIRT_BASE + TMR_ICR(0));
+        __raw_writel(0x01, TIMERS_VIRT_BASE + TMR_IER(0));
+
+        next = timer_read() + delta;
+        __raw_writel(next, TIMERS_VIRT_BASE + TMR_TN_MM(0, 0));
+
+        local_irq_restore(flags);
+        return 0;
+}
+
+static void timer_set_mode(enum clock_event_mode mode,
+                           struct clock_event_device *dev)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        switch (mode) {
+        case CLOCK_EVT_MODE_ONESHOT:
+        case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_SHUTDOWN:
+                /* disable the matching interrupt */
+                __raw_writel(0x00, TIMERS_VIRT_BASE + TMR_IER(0));
+                break;
+        case CLOCK_EVT_MODE_RESUME:
+        case CLOCK_EVT_MODE_PERIODIC:
+                break;
+        }
+        local_irq_restore(flags);
+}
+
+static struct clock_event_device ckevt = {
+        .name           = "clockevent",
+        .features       = CLOCK_EVT_FEAT_ONESHOT,
+        .shift          = 32,
+        .rating         = 200,
+        .set_next_event = timer_set_next_event,
+        .set_mode       = timer_set_mode,
+};
+
+static cycle_t clksrc_read(void)
+{
+        return timer_read();
+}
+
+static struct clocksource cksrc = {
+        .name           = "clocksource",
+        .shift          = 20,
+        .rating         = 200,
+        .read           = clksrc_read,
+        .mask           = CLOCKSOURCE_MASK(32),
+        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static void __init timer_config(void)
+{
+        uint32_t ccr = __raw_readl(TIMERS_VIRT_BASE + TMR_CCR);
+        uint32_t cer = __raw_readl(TIMERS_VIRT_BASE + TMR_CER);
+        uint32_t cmr = __raw_readl(TIMERS_VIRT_BASE + TMR_CMR);
+
+        __raw_writel(cer & ~0x1, TIMERS_VIRT_BASE + TMR_CER); /* disable */
+
+        ccr &= TMR_CCR_CS_0(0x3);
+        __raw_writel(ccr, TIMERS_VIRT_BASE + TMR_CCR);
+
+        /* free-running mode */
+        __raw_writel(cmr | 0x01, TIMERS_VIRT_BASE + TMR_CMR);
+
+        __raw_writel(0x0, TIMERS_VIRT_BASE + TMR_PLCR(0)); /* free-running */
+        __raw_writel(0x7, TIMERS_VIRT_BASE + TMR_ICR(0));  /* clear status */
+        __raw_writel(0x0, TIMERS_VIRT_BASE + TMR_IER(0));
+
+        /* enable timer counter */
+        __raw_writel(cer | 0x01, TIMERS_VIRT_BASE + TMR_CER);
+}
+
+static struct irqaction timer_irq = {
+        .name           = "timer",
+        .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+        .handler        = timer_interrupt,
+        .dev_id         = &ckevt,
+};
+
+void __init timer_init(int irq)
+{
+        timer_config();
+
+        set_tcr2ns_scale(CLOCK_TICK_RATE);
+
+        ckevt.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, ckevt.shift);
+        ckevt.max_delta_ns = clockevent_delta2ns(MAX_DELTA, &ckevt);
+        ckevt.min_delta_ns = clockevent_delta2ns(MIN_DELTA, &ckevt);
+        ckevt.cpumask = cpumask_of(0);
+
+        cksrc.mult = clocksource_hz2mult(CLOCK_TICK_RATE, cksrc.shift);
+
+        setup_irq(irq, &timer_irq);
+
+        clocksource_register(&cksrc);
+        clockevents_register_device(&ckevt);
+}