<commit_before>/*
 * arch/arm/mach-ixp4xx/common.c
 *
 * Generic code shared across all IXP4XX platforms
 *
 * Maintainer: <NAME> <<EMAIL>>
 *
 * Copyright 2002 (c) Intel Corporation
 * Copyright 2003-2004 (c) MontaVista, Software, Inc. 
 * 
 * This file is licensed under  the terms of the GNU General Public 
 * License version 2. This program is licensed "as is" without any 
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/time.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/io.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <linux/cpu.h>
#include <linux/sched_clock.h>

#include <mach/udc.h>
#include <mach/hardware.h>
#include <mach/io.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
#include <asm/system_misc.h>

#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>

#define IXP4XX_TIMER_FREQ 66666000
#define IXP4XX_LATCH DIV_ROUND_CLOSEST(IXP4XX_TIMER_FREQ, HZ)

static void __init ixp4xx_clocksource_init(void);
static void __init ixp4xx_clockevent_init(void);
static struct clock_event_device clockevent_ixp4xx;

/*************************************************************************
 * IXP4xx chipset I/O mapping
 *************************************************************************/
static struct map_desc ixp4xx_io_desc[] __initdata = {
	{	/* UART, Interrupt ctrl, GPIO, timers, NPEs, MACs, USB .... */
		.virtual	= (unsigned long)IXP4XX_PERIPHERAL_BASE_VIRT,
		.pfn		= __phys_to_pfn(IXP4XX_PERIPHERAL_BASE_PHYS),
		.length		= IXP4XX_PERIPHERAL_REGION_SIZE,
		.type		= MT_DEVICE
	}, {	/* Expansion Bus Config Registers */
		.virtual	= (unsigned long)IXP4XX_EXP_CFG_BASE_VIRT,
		.pfn		= __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
		.length		= IXP4XX_EXP_CFG_REGION_SIZE,
		.type		= MT_DEVICE<commit_msg>ARM: ixp4xx: fix timer latch calculation<commit_after>/*
 * arch/arm/mach-ixp4xx/common.c
 *
 * Generic code shared across all IXP4XX platforms
 *
 * Maintainer: <NAME> <<EMAIL>>
 *
 * Copyright 2002 (c) Intel Corporation
 * Copyright 2003-2004 (c) MontaVista, Software, Inc. 
 * 
 * This file is licensed under  the terms of the GNU General Public 
 * License version 2. This program is licensed "as is" without any 
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/time.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/io.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <linux/cpu.h>
#include <linux/sched_clock.h>

#include <mach/udc.h>
#include <mach/hardware.h>
#include <mach/io.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
#include <asm/system_misc.h>

#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>

#define IXP4XX_TIMER_FREQ 66666000

/*
 * The timer register doesn't allow to specify the two least significant bits of
 * the timeout value and assumes them being zero. So make sure IXP4XX_LATCH is
 * the best value with the two least significant bits unset.
 */
#define IXP4XX_LATCH DIV_ROUND_CLOSEST(IXP4XX_TIMER_FREQ, \
				       (IXP4XX_OST_RELOAD_MASK + 1) * HZ) * \
			(IXP4XX_OST_RELOAD_MASK + 1)

static void __init ixp4xx_clocksource_init(void);
static void __init ixp4xx_clockevent_init(void);
static struct clock_event_device clockevent_ixp4xx;

/*************************************************************************
 * IXP4xx chipset I/O mapping
 *************************************************************************/
static struct map_desc ixp4xx_io_desc[] __initdata = {
	{	/* UART, Interrupt ctrl, GPIO, timers, NPEs, MACs, USB .... */
		.virtual	= (unsigned long)IXP4XX_PERIPHERAL_BASE_VIRT,
		.pfn		= __phys_to_pfn(IXP4XX_PERIPHERAL_BASE_PHYS),
		.length		= IXP4XX_PERIPHERAL_REGION_SIZE,
		.type		= MT_DEVICE
	}, {	/* Expansion Bus Config Registers */
		.virtual	= (unsigned long)IXP4XX_EXP_CFG_BASE_VIRT,
		.pfn		= __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
		.length		= IXP4XX_EXP_CFG_REGION_SIZE,
		.type		= MT_DEVICE
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