Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (25 commits)
  [MIPS] Jazz: disable PIT; cleanup R4030 clockevent
  [MIPS] Bigsur supports highmem.
  [MIPS] mtx-1: Enable -Werror.
  [MIPS] mtx-1: Remove unused mtx1_sys_btn.
  [MIPS] Pb1200: Enable -Werror.
  [MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.
  [MIPS] SNI: register a02r clockevent; don't use PIT timer
  [MIPS] i8253.h: Remove all i8259 related definitions.
  [MIPS] i8253: Cleanup.
  [MIPS] Cobalt: Fix IRQ comment; the Cobalt kernel uses CP0 counter now.
  [MIPS] Pb1200: Fix warning.
  [MIPS] Pb1200: Fix warning.
  [MIPS] IP27: Fix build error.
  [MIPS] Excite: Fix build error.
  [MIPS] Sibyte: Split and move clock code.
  [MIPS] Sibyte: Fixes for oneshot timer mode.
  [MIPS] Sibyte: Remove blank line.
  [MIPS] Swarm: Fix build failure
  [MIPS] time: Code cleanups
  [MIPS] time: Remove now unused local_timer_interrupt.
  ...

33 files changed, 575 insertions, 645 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 97da953eb5d..2c7d6c240b7 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -546,6 +546,7 @@ config SIBYTE_BIGSUR
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_SB1
 	select SYS_SUPPORTS_BIG_ENDIAN
+	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 
 config SNI_RM
@@ -733,15 +734,27 @@ config ARCH_MAY_HAVE_PC_FDC
 config BOOT_RAW
 	bool
 
+config CEVT_BCM1480
+	bool
+
 config CEVT_GT641XX
 	bool
 
 config CEVT_R4K
 	bool
 
+config CEVT_SB1250
+	bool
+
 config CEVT_TXX9
 	bool
 
+config CSRC_BCM1480
+	bool
+
+config CSRC_SB1250
+	bool
+
 config CFE
 	bool
 
diff --git a/arch/mips/au1000/mtx-1/Makefile b/arch/mips/au1000/mtx-1/Makefile
index afa7007d67f..85a90941de4 100644
--- a/arch/mips/au1000/mtx-1/Makefile
+++ b/arch/mips/au1000/mtx-1/Makefile
@@ -9,3 +9,5 @@
 
 lib-y := init.o board_setup.o irqmap.o
 obj-y := platform.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/au1000/mtx-1/platform.c b/arch/mips/au1000/mtx-1/platform.c
index 01ebff67797..49c0fb409fe 100644
--- a/arch/mips/au1000/mtx-1/platform.c
+++ b/arch/mips/au1000/mtx-1/platform.c
@@ -34,15 +34,6 @@ static struct resource mtx1_wdt_res[] = {
 	}
 };
 
-static struct resource mtx1_sys_btn[] = {
-	[0] = {
-		.start	= 7,
-		.end	= 7,
-		.name	= "mtx1-sys-btn-gpio",
-		.flags	= IORESOURCE_IRQ,
-	}
-};
-
 static struct platform_device mtx1_wdt = {
 	.name = "mtx1-wdt",
 	.id = 0,
diff --git a/arch/mips/au1000/pb1200/Makefile b/arch/mips/au1000/pb1200/Makefile
index 22b673cf55a..970b1b1d5cd 100644
--- a/arch/mips/au1000/pb1200/Makefile
+++ b/arch/mips/au1000/pb1200/Makefile
@@ -3,3 +3,5 @@
 #
 
 lib-y := init.o board_setup.o irqmap.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/au1000/pb1200/board_setup.c b/arch/mips/au1000/pb1200/board_setup.c
index 5dbc9868f59..b98bebfa87c 100644
--- a/arch/mips/au1000/pb1200/board_setup.c
+++ b/arch/mips/au1000/pb1200/board_setup.c
@@ -68,9 +68,11 @@ void board_reset(void)
 void __init board_setup(void)
 {
 	char *argptr = NULL;
-	u32 pin_func;
 
 #if 0
+	{
+	u32 pin_func;
+
 	/* Enable PSC1 SYNC for AC97.  Normaly done in audio driver,
 	 * but it is board specific code, so put it here.
 	 */
@@ -81,11 +83,13 @@ void __init board_setup(void)
 
 	au_writel(0, (u32)bcsr|0x10); /* turn off pcmcia power */
 	au_sync();
+	}
 #endif
 
 #if defined(CONFIG_I2C_AU1550)
 	{
 	u32 freq0, clksrc;
+	u32 pin_func;
 
 	/* Select SMBUS in CPLD */
 	bcsr->resets &= ~(BCSR_RESETS_PCS0MUX);
diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
index bdf00e2a35e..c096be4ed4e 100644
--- a/arch/mips/au1000/pb1200/irqmap.c
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -94,51 +94,41 @@ inline void pb1200_disable_irq(unsigned int irq_nr)
 	bcsr->intclr = 1<<(irq_nr - PB1200_INT_BEGIN);
 }
 
-static unsigned int pb1200_startup_irq( unsigned int irq_nr )
+static unsigned int pb1200_setup_cascade(void)
 {
-	if (++pb1200_cascade_en == 1)
-	{
-		request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
-			0, "Pb1200 Cascade", (void *)&pb1200_cascade_handler );
-#ifdef CONFIG_MIPS_PB1200
-    /* We have a problem with CPLD rev3. Enable a workaround */
-	if( ((bcsr->whoami & BCSR_WHOAMI_CPLD)>>4) <= 3)
-	{
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("Pb1200 must be at CPLD rev4. Please have Pb1200\n");
-		printk("updated to latest revision. This software will not\n");
-		printk("work on anything less than CPLD rev4\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		printk("\nWARNING!!!\n");
-		while(1);
-	}
-#endif
-	}
-	pb1200_enable_irq(irq_nr);
+	int err;
+
+	err = request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
+			  0, "Pb1200 Cascade", &pb1200_cascade_handler);
+	if (err)
+		return err;
+
 	return 0;
 }
 
-static void pb1200_shutdown_irq( unsigned int irq_nr )
+static unsigned int pb1200_startup_irq(unsigned int irq)
 {
-	pb1200_disable_irq(irq_nr);
-	if (--pb1200_cascade_en == 0)
-	{
-		free_irq(AU1000_GPIO_7, &pb1200_cascade_handler );
+	if (++pb1200_cascade_en == 1) {
+		int res;
+
+		res = pb1200_setup_cascade();
+		if (res)
+			return res;
 	}
-	return;
+
+	pb1200_enable_irq(irq);
+
+	return 0;
 }
 
-static struct irq_chip external_irq_type =
+static void pb1200_shutdown_irq(unsigned int irq)
 {
+	pb1200_disable_irq(irq);
+	if (--pb1200_cascade_en == 0)
+		free_irq(AU1000_GPIO_7, &pb1200_cascade_handler);
+}
+
+static struct irq_chip external_irq_type = {
 #ifdef CONFIG_MIPS_PB1200
 	.name = "Pb1200 Ext",
 #endif
@@ -155,16 +145,38 @@ static struct irq_chip external_irq_type =
 
 void _board_init_irq(void)
 {
-	int irq_nr;
+	unsigned int irq;
 
-	for (irq_nr = PB1200_INT_BEGIN; irq_nr <= PB1200_INT_END; irq_nr++)
-	{
-		set_irq_chip_and_handler(irq_nr, &external_irq_type,
+#ifdef CONFIG_MIPS_PB1200
+	/* We have a problem with CPLD rev3. Enable a workaround */
+	if (((bcsr->whoami & BCSR_WHOAMI_CPLD) >> 4) <= 3) {
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("Pb1200 must be at CPLD rev4. Please have Pb1200\n");
+		printk("updated to latest revision. This software will not\n");
+		printk("work on anything less than CPLD rev4\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		printk("\nWARNING!!!\n");
+		panic("Game over.  Your score is 0.");
+	}
+#endif
+
+	for (irq = PB1200_INT_BEGIN; irq <= PB1200_INT_END; irq++) {
+		set_irq_chip_and_handler(irq, &external_irq_type,
 					 handle_level_irq);
-		pb1200_disable_irq(irq_nr);
+		pb1200_disable_irq(irq);
 	}
 
-	/* GPIO_7 can not be hooked here, so it is hooked upon first
-	request of any source attached to the cascade */
+	/*
+	 * GPIO_7 can not be hooked here, so it is hooked upon first
+	 * request of any source attached to the cascade
+	 */
 }
-
diff --git a/arch/mips/basler/excite/excite_setup.c b/arch/mips/basler/excite/excite_setup.c
index 24378b9223f..6dd8f0d46d0 100644
--- a/arch/mips/basler/excite/excite_setup.c
+++ b/arch/mips/basler/excite/excite_setup.c
@@ -77,7 +77,7 @@ int titan_irqflags;
 void __init plat_time_init(void)
 {
 	const u32 modebit5 = ocd_readl(0x00e4);
-	unsigned int mult = ((modebit5 >> 11) & 0x1f) + 2,
+	unsigned int mult = ((modebit5 >> 11) & 0x1f) + 2;
 	unsigned int div = ((modebit5 >> 16) & 0x1f) + 2;
 
 	if (div == 33)
diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
index ae25b480723..d7f8a782aae 100644
--- a/arch/mips/jazz/irq.c
+++ b/arch/mips/jazz/irq.c
@@ -97,9 +97,10 @@ asmlinkage void plat_irq_dispatch(void)
 	if (pending & IE_IRQ4) {
 		r4030_read_reg32(JAZZ_TIMER_REGISTER);
 		do_IRQ(JAZZ_TIMER_IRQ);
-	} else if (pending & IE_IRQ2)
-		do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK));
-	else if (pending & IE_IRQ1) {
+	} else if (pending & IE_IRQ2) {
+		irq = *(volatile u8 *)JAZZ_EISA_IRQ_ACK;
+		do_IRQ(irq);
+	} else if (pending & IE_IRQ1) {
 		irq = *(volatile u8 *)JAZZ_IO_IRQ_SOURCE >> 2;
 		if (likely(irq > 0))
 			do_IRQ(irq + JAZZ_IRQ_START - 1);
@@ -117,16 +118,16 @@ static void r4030_set_mode(enum clock_event_mode mode,
 struct clock_event_device r4030_clockevent = {
 	.name		= "r4030",
 	.features	= CLOCK_EVT_FEAT_PERIODIC,
-	.rating		= 100,
+	.rating		= 300,
 	.irq		= JAZZ_TIMER_IRQ,
-	.cpumask	= CPU_MASK_CPU0,
 	.set_mode	= r4030_set_mode,
 };
 
 static irqreturn_t r4030_timer_interrupt(int irq, void *dev_id)
 {
-	r4030_clockevent.event_handler(&r4030_clockevent);
+	struct clock_event_device *cd = dev_id;
 
+	cd->event_handler(cd);
 	return IRQ_HANDLED;
 }
 
@@ -134,15 +135,22 @@ static struct irqaction r4030_timer_irqaction = {
 	.handler	= r4030_timer_interrupt,
 	.flags		= IRQF_DISABLED,
 	.mask		= CPU_MASK_CPU0,
-	.name		= "timer",
+	.name		= "R4030 timer",
 };
 
 void __init plat_time_init(void)
 {
-	struct irqaction *irq = &r4030_timer_irqaction;
+	struct clock_event_device *cd = &r4030_clockevent;
+	struct irqaction *action = &r4030_timer_irqaction;
+	unsigned int cpu = smp_processor_id();
 
 	BUG_ON(HZ != 100);
 
+	cd->cpumask             = cpumask_of_cpu(cpu);
+	clockevents_register_device(cd);
+	action->dev_id = cd;
+	setup_irq(JAZZ_TIMER_IRQ, action);
+
 	/*
 	 * Set clock to 100Hz.
 	 *
@@ -150,8 +158,5 @@ void __init plat_time_init(void)
 	 * a programmable 4-bit divider.  This makes it fairly inflexible.
 	 */
 	r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
-	setup_irq(JAZZ_TIMER_IRQ, irq);
-
-	clockevents_register_device(&r4030_clockevent);
 	setup_pit_timer();
 }
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 3196509a28d..b551535b7e4 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -8,9 +8,13 @@ obj-y		+= cpu-probe.o branch.o entry.o genex.o irq.o process.o \
 		   ptrace.o reset.o semaphore.o setup.o signal.o syscall.o \
 		   time.o topology.o traps.o unaligned.o
 
+obj-$(CONFIG_CEVT_BCM1480)	+= cevt-bcm1480.o
 obj-$(CONFIG_CEVT_R4K)		+= cevt-r4k.o
 obj-$(CONFIG_CEVT_GT641XX)	+= cevt-gt641xx.o
+obj-$(CONFIG_CEVT_SB1250)	+= cevt-sb1250.o
 obj-$(CONFIG_CEVT_TXX9)		+= cevt-txx9.o
+obj-$(CONFIG_CSRC_BCM1480)	+= csrc-bcm1480.o
+obj-$(CONFIG_CSRC_SB1250)	+= csrc-sb1250.o
 
 binfmt_irix-objs	:= irixelf.o irixinv.o irixioctl.o irixsig.o	\
 			   irix5sys.o sysirix.o
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
new file mode 100644
index 00000000000..21e6d63eb4d
--- /dev/null
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2000,2001,2004 Broadcom Corporation
+ *
+ * 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.
+ */
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/percpu.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+#include <asm/sibyte/bcm1480_scd.h>
+
+#include <asm/sibyte/sb1250.h>
+
+#define IMR_IP2_VAL	K_BCM1480_INT_MAP_I0
+#define IMR_IP3_VAL	K_BCM1480_INT_MAP_I1
+#define IMR_IP4_VAL	K_BCM1480_INT_MAP_I2
+
+/*
+ * The general purpose timer ticks at 1MHz independent if
+ * the rest of the system
+ */
+static void sibyte_set_mode(enum clock_event_mode mode,
+                           struct clock_event_device *evt)
+{
+	unsigned int cpu = smp_processor_id();
+	void __iomem *cfg, *init;
+
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
+
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		__raw_writeq(0, cfg);
+		__raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);
+		__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
+			     cfg);
+		break;
+
+	case CLOCK_EVT_MODE_ONESHOT:
+		/* Stop the timer until we actually program a shot */
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		__raw_writeq(0, cfg);
+		break;
+
+	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
+	case CLOCK_EVT_MODE_RESUME:
+		;
+	}
+}
+
+static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
+{
+	unsigned int cpu = smp_processor_id();
+	void __iomem *cfg, *init;
+
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
+
+	__raw_writeq(delta - 1, init);
+	__raw_writeq(M_SCD_TIMER_ENABLE, cfg);
+
+	return 0;
+}
+
+static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
+{
+	unsigned int cpu = smp_processor_id();
+	struct clock_event_device *cd = dev_id;
+	void __iomem *cfg;
+	unsigned long tmode;
+
+	if (cd->mode == CLOCK_EVT_MODE_PERIODIC)
+		tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;
+	else
+		tmode = 0;
+
+	/* ACK interrupt */
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	____raw_writeq(tmode, cfg);
+
+	cd->event_handler(cd);
+
+	return IRQ_HANDLED;
+}
+
+static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
+static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
+static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
+
+void __cpuinit sb1480_clockevent_init(void)
+{
+	unsigned int cpu = smp_processor_id();
+	unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
+	struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
+	struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
+	unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
+
+	BUG_ON(cpu > 3);	/* Only have 4 general purpose timers */
+
+	sprintf(name, "bcm1480-counter-%d", cpu);
+	cd->name		= name;
+	cd->features		= CLOCK_EVT_FEAT_PERIODIC |
+				  CLOCK_EVT_FEAT_ONESHOT;
+	clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
+	cd->max_delta_ns	= clockevent_delta2ns(0x7fffff, cd);
+	cd->min_delta_ns	= clockevent_delta2ns(1, cd);
+	cd->rating		= 200;
+	cd->irq			= irq;
+	cd->cpumask		= cpumask_of_cpu(cpu);
+	cd->set_next_event	= sibyte_next_event;
+	cd->set_mode		= sibyte_set_mode;
+	clockevents_register_device(cd);
+
+	bcm1480_mask_irq(cpu, irq);
+
+	/*
+	 * Map the timer interrupt to IP[4] of this cpu
+	 */
+	__raw_writeq(IMR_IP4_VAL,
+		     IOADDR(A_BCM1480_IMR_REGISTER(cpu,
+			R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3)));
+
+	bcm1480_unmask_irq(cpu, irq);
+
+	action->handler	= sibyte_counter_handler;
+	action->flags	= IRQF_DISABLED | IRQF_PERCPU;
+	action->name	= name;
+	action->dev_id	= cd;
+	setup_irq(irq, action);
+}
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
new file mode 100644
index 00000000000..e2029d0fc39
--- /dev/null
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ *
+ * 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.
+ */
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/percpu.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+#include <asm/sibyte/sb1250.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/sb1250_int.h>
+#include <asm/sibyte/sb1250_scd.h>
+
+#define IMR_IP2_VAL	K_INT_MAP_I0
+#define IMR_IP3_VAL	K_INT_MAP_I1
+#define IMR_IP4_VAL	K_INT_MAP_I2
+
+/*
+ * The general purpose timer ticks at 1MHz independent if
+ * the rest of the system
+ */
+static void sibyte_set_mode(enum clock_event_mode mode,
+                           struct clock_event_device *evt)
+{
+	unsigned int cpu = smp_processor_id();
+	void __iomem *cfg, *init;
+
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
+
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		__raw_writeq(0, cfg);
+		__raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);
+		__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
+			     cfg);
+		break;
+
+	case CLOCK_EVT_MODE_ONESHOT:
+		/* Stop the timer until we actually program a shot */
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		__raw_writeq(0, cfg);
+		break;
+
+	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
+	case CLOCK_EVT_MODE_RESUME:
+		;
+	}
+}
+
+static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
+{
+	unsigned int cpu = smp_processor_id();
+	void __iomem *cfg, *init;
+
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
+
+	__raw_writeq(delta - 1, init);
+	__raw_writeq(M_SCD_TIMER_ENABLE, cfg);
+
+	return 0;
+}
+
+static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
+{
+	unsigned int cpu = smp_processor_id();
+	struct clock_event_device *cd = dev_id;
+	void __iomem *cfg;
+	unsigned long tmode;
+
+	if (cd->mode == CLOCK_EVT_MODE_PERIODIC)
+		tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;
+	else
+		tmode = 0;
+
+	/* ACK interrupt */
+	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
+	____raw_writeq(tmode, cfg);
+
+	cd->event_handler(cd);
+
+	return IRQ_HANDLED;
+}
+
+static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
+static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
+static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
+
+void __cpuinit sb1250_clockevent_init(void)
+{
+	unsigned int cpu = smp_processor_id();
+	unsigned int irq = K_INT_TIMER_0 + cpu;
+	struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
+	struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
+	unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
+
+	/* Only have 4 general purpose timers, and we use last one as hpt */
+	BUG_ON(cpu > 2);
+
+	sprintf(name, "sb1250-counter-%d", cpu);
+	cd->name		= name;
+	cd->features		= CLOCK_EVT_FEAT_PERIODIC |
+				  CLOCK_EVT_FEAT_ONESHOT;
+	clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
+	cd->max_delta_ns	= clockevent_delta2ns(0x7fffff, cd);
+	cd->min_delta_ns	= clockevent_delta2ns(1, cd);
+	cd->rating		= 200;
+	cd->irq			= irq;
+	cd->cpumask		= cpumask_of_cpu(cpu);
+	cd->set_next_event	= sibyte_next_event;
+	cd->set_mode		= sibyte_set_mode;
+	clockevents_register_device(cd);
+
+	sb1250_mask_irq(cpu, irq);
+
+	/*
+	 * Map the timer interrupt to IP[4] of this cpu
+	 */
+	__raw_writeq(IMR_IP4_VAL,
+		     IOADDR(A_IMR_REGISTER(cpu, R_IMR_INTERRUPT_MAP_BASE) +
+			    (irq << 3)));
+
+	sb1250_unmask_irq(cpu, irq);
+
+	action->handler	= sibyte_counter_handler;
+	action->flags	= IRQF_DISABLED | IRQF_PERCPU;
+	action->name	= name;
+	action->dev_id	= cd;
+	setup_irq(irq, action);
+}
diff --git a/arch/mips/kernel/csrc-bcm1480.c b/arch/mips/kernel/csrc-bcm1480.c
new file mode 100644
index 00000000000..868745e7184
--- /dev/null
+++ b/arch/mips/kernel/csrc-bcm1480.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2000,2001,2004 Broadcom Corporation
+ *
+ * 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.
+ */
+#include <linux/clocksource.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+#include <asm/sibyte/bcm1480_regs.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/bcm1480_int.h>
+#include <asm/sibyte/bcm1480_scd.h>
+
+#include <asm/sibyte/sb1250.h>
+
+static cycle_t bcm1480_hpt_read(void)
+{
+	return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
+}
+
+struct clocksource bcm1480_clocksource = {
+	.name	= "zbbus-cycles",
+	.rating	= 200,
+	.read	= bcm1480_hpt_read,
+	.mask	= CLOCKSOURCE_MASK(64),
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init sb1480_clocksource_init(void)
+{
+	struct clocksource *cs = &bcm1480_clocksource;
+	unsigned int plldiv;
+	unsigned long zbbus;
+
+	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
+	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
+	clocksource_set_clock(cs, zbbus);
+	clocksource_register(cs);
+}
diff --git a/arch/mips/kernel/csrc-sb1250.c b/arch/mips/kernel/csrc-sb1250.c
new file mode 100644
index 00000000000..ebb16e66887
--- /dev/null
+++ b/arch/mips/kernel/csrc-sb1250.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ *
+ * 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.
+ */
+#include <linux/clocksource.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+#include <asm/sibyte/sb1250.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/sb1250_int.h>
+#include <asm/sibyte/sb1250_scd.h>
+
+#define SB1250_HPT_NUM		3
+#define SB1250_HPT_VALUE	M_SCD_TIMER_CNT /* max value */
+
+/*
+ * The HPT is free running from SB1250_HPT_VALUE down to 0 then starts over
+ * again.
+ */
+static cycle_t sb1250_hpt_read(void)
+{
+	unsigned int count;
+
+	count = G_SCD_TIMER_CNT(__raw_readq(IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM, R_SCD_TIMER_CNT))));
+
+	return SB1250_HPT_VALUE - count;
+}
+
+struct clocksource bcm1250_clocksource = {
+	.name	= "MIPS",
+	.rating	= 200,
+	.read	= sb1250_hpt_read,
+	.mask	= CLOCKSOURCE_MASK(23),
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init sb1250_clocksource_init(void)
+{
+	struct clocksource *cs = &bcm1250_clocksource;
+
+	/* Setup hpt using timer #3 but do not enable irq for it */
+	__raw_writeq(0,
+		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
+						 R_SCD_TIMER_CFG)));
+	__raw_writeq(SB1250_HPT_VALUE,
+		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
+						 R_SCD_TIMER_INIT)));
+	__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
+		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
+						 R_SCD_TIMER_CFG)));
+
+	clocksource_set_clock(cs, V_SCD_TIMER_FREQ);
+	clocksource_register(cs);
+}
diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c
index 5d9830df359..a925abd8d29 100644
--- a/arch/mips/kernel/i8253.c
+++ b/arch/mips/kernel/i8253.c
@@ -12,6 +12,7 @@
 #include <asm/delay.h>
 #include <asm/i8253.h>
 #include <asm/io.h>
+#include <asm/time.h>
 
 static DEFINE_SPINLOCK(i8253_lock);
 
@@ -87,11 +88,10 @@ struct clock_event_device pit_clockevent = {
 	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 	.set_mode	= init_pit_timer,
 	.set_next_event = pit_next_event,
-	.shift		= 32,
 	.irq		= 0,
 };
 
-irqreturn_t timer_interrupt(int irq, void *dev_id)
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
 	pit_clockevent.event_handler(&pit_clockevent);
 
@@ -111,19 +111,20 @@ static struct irqaction irq0  = {
  */
 void __init setup_pit_timer(void)
 {
+	struct clock_event_device *cd = &pit_clockevent;
+	unsigned int cpu = smp_processor_id();
+
 	/*
 	 * Start pit with the boot cpu mask and make it global after the
 	 * IO_APIC has been initialized.
 	 */
-	pit_clockevent.cpumask = cpumask_of_cpu(0);
-	pit_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, 32);
-	pit_clockevent.max_delta_ns =
-		clockevent_delta2ns(0x7FFF, &pit_clockevent);
-	pit_clockevent.min_delta_ns =
-		clockevent_delta2ns(0xF, &pit_clockevent);
-	clockevents_register_device(&pit_clockevent);
-
-	irq0.mask = cpumask_of_cpu(0);
+	cd->cpumask = cpumask_of_cpu(cpu);
+	clockevent_set_clock(cd, CLOCK_TICK_RATE);
+	cd->max_delta_ns = clockevent_delta2ns(0x7FFF, cd);
+	cd->min_delta_ns = clockevent_delta2ns(0xF, cd);
+	clockevents_register_device(cd);
+
+	irq0.mask = cpumask_of_cpu(cpu);
 	setup_irq(0, &irq0);
 }
 
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 27228f583da..3284b9b4eca 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -3,8 +3,7 @@
  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
  * Copyright (c) 2003, 2004  Maciej W. Rozycki
  *
- * Common time service routines for MIPS machines. See
- * Documentation/mips/time.README.
+ * Common time service routines for MIPS machines.
  *
  * 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
@@ -18,28 +17,17 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/param.h>
-#include <linux/profile.h>
 #include <linux/time.h>
 #include <linux/timex.h>
 #include <linux/smp.h>
-#include <linux/kernel_stat.h>
 #include <linux/spinlock.h>
-#include <linux/interrupt.h>
 #include <linux/module.h>
-#include <linux/kallsyms.h>
 
-#include <asm/bootinfo.h>
-#include <asm/cache.h>
-#include <asm/compiler.h>
-#include <asm/cpu.h>
 #include <asm/cpu-features.h>
 #include <asm/div64.h>
-#include <asm/sections.h>
 #include <asm/smtc_ipi.h>
 #include <asm/time.h>
 
-#include <irq.h>
-
 /*
  * forward reference
  */
@@ -63,14 +51,6 @@ int update_persistent_clock(struct timespec now)
 }
 
 /*
- * Null high precision timer functions for systems lacking one.
- */
-static cycle_t null_hpt_read(void)
-{
-	return 0;
-}
-
-/*
  * High precision timer functions for a R4k-compatible timer.
  */
 static cycle_t c0_hpt_read(void)
@@ -80,22 +60,6 @@ static cycle_t c0_hpt_read(void)
 
 int (*mips_timer_state)(void);
 
-/*
- * local_timer_interrupt() does profiling and process accounting
- * on a per-CPU basis.
- *
- * In UP mode, it is invoked from the (global) timer_interrupt.
- *
- * In SMP mode, it might invoked by per-CPU timer interrupt, or
- * a broadcasted inter-processor interrupt which itself is triggered
- * by the global timer interrupt.
- */
-void local_timer_interrupt(int irq, void *dev_id)
-{
-	profile_tick(CPU_PROFILING);
-	update_process_times(user_mode(get_irq_regs()));
-}
-
 int null_perf_irq(void)
 {
 	return 0;
@@ -120,6 +84,13 @@ EXPORT_SYMBOL(perf_irq);
 
 unsigned int mips_hpt_frequency;
 
+static struct clocksource clocksource_mips = {
+	.name		= "MIPS",
+	.read		= c0_hpt_read,
+	.mask		= CLOCKSOURCE_MASK(32),
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
 static unsigned int __init calibrate_hpt(void)
 {
 	cycle_t frequency, hpt_start, hpt_end, hpt_count, hz;
@@ -162,12 +133,6 @@ static unsigned int __init calibrate_hpt(void)
 	return frequency >> log_2_loops;
 }
 
-struct clocksource clocksource_mips = {
-	.name		= "MIPS",
-	.mask		= CLOCKSOURCE_MASK(32),
-	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
 void __init clocksource_set_clock(struct clocksource *cs, unsigned int clock)
 {
 	u64 temp;
@@ -203,9 +168,6 @@ void __cpuinit clockevent_set_clock(struct clock_event_device *cd,
 
 static void __init init_mips_clocksource(void)
 {
-	if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
-		return;
-
 	/* Calclate a somewhat reasonable rating value */
 	clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
 
@@ -227,7 +189,7 @@ void __init __weak plat_time_init(void)
  * setup_irq calls and each clock_event_device should use its own
  * struct irqrequest.
  */
-void __init plat_timer_setup(struct irqaction *irq)
+void __init plat_timer_setup(void)
 {
 	BUG();
 }
@@ -236,21 +198,8 @@ void __init time_init(void)
 {
 	plat_time_init();
 
-	/* Choose appropriate high precision timer routines.  */
-	if (!cpu_has_counter && !clocksource_mips.read)
-		/* No high precision timer -- sorry.  */
-		clocksource_mips.read = null_hpt_read;
-	else if (!mips_hpt_frequency && !mips_timer_state) {
-		/* A high precision timer of unknown frequency.  */
-		if (!clocksource_mips.read)
-			/* No external high precision timer -- use R4k.  */
-			clocksource_mips.read = c0_hpt_read;
-	} else {
+	if (cpu_has_counter && (mips_hpt_frequency || mips_timer_state)) {
 		/* We know counter frequency.  Or we can get it.  */
-		if (!clocksource_mips.read) {
-			/* No external high precision timer -- use R4k.  */
-			clocksource_mips.read = c0_hpt_read;
-		}
 		if (!mips_hpt_frequency)
 			mips_hpt_frequency = calibrate_hpt();
 
@@ -258,8 +207,8 @@ void __init time_init(void)
 		printk("Using %u.%03u MHz high precision timer.\n",
 		       ((mips_hpt_frequency + 500) / 1000) / 1000,
 		       ((mips_hpt_frequency + 500) / 1000) % 1000);
+		init_mips_clocksource();
 	}
 
-	init_mips_clocksource();
 	mips_clockevent_init();
 }
diff --git a/arch/mips/qemu/q-irq.c b/arch/mips/qemu/q-irq.c
index 4681757460a..11f98476788 100644
--- a/arch/mips/qemu/q-irq.c
+++ b/arch/mips/qemu/q-irq.c
@@ -1,4 +1,5 @@
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/linkage.h>
 
 #include <asm/i8259.h>
diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index dc59c3b708e..08d45369be4 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -131,7 +131,7 @@ static struct irq_chip rt_irq_type = {
 static int rt_next_event(unsigned long delta, struct clock_event_device *evt)
 {
 	unsigned int cpu = smp_processor_id();
-	int slice putoslice(cpu);
+	int slice = cputoslice(cpu);
 	unsigned long cnt;
 
 	cnt = LOCAL_HUB_L(PI_RT_COUNT);
@@ -169,7 +169,7 @@ static irqreturn_t hub_rt_counter_handler(int irq, void *dev_id)
 	/*
 	 * Ack
 	 */
-	LOCAL_HUB_S(PI_RT_PEND_A + PI_COUNT_OFFSET * slice, cnt);
+	LOCAL_HUB_S(PI_RT_PEND_A + PI_COUNT_OFFSET * slice, 0);
 	cd->event_handler(cd);
 
 	return IRQ_HANDLED;
diff --git a/arch/mips/sgi-ip32/ip32-platform.c b/arch/mips/sgi-ip32/ip32-platform.c
index 7309e48d163..77febd68fcd 100644
--- a/arch/mips/sgi-ip32/ip32-platform.c
+++ b/arch/mips/sgi-ip32/ip32-platform.c
@@ -42,7 +42,7 @@ static struct platform_device uart8250_device = {
 static int __init uart8250_init(void)
 {
 	uart8250_data[0].membase = (void __iomem *) &mace->isa.serial1;
-	uart8250_data[1].membase = (void __iomem *) &mace->isa.serial1;
+	uart8250_data[1].membase = (void __iomem *) &mace->isa.serial2;
 
 	return platform_device_register(&uart8250_device);
 }
diff --git a/arch/mips/sibyte/Kconfig b/arch/mips/sibyte/Kconfig
index e8fb880272b..366b19d33f7 100644
--- a/arch/mips/sibyte/Kconfig
+++ b/arch/mips/sibyte/Kconfig
@@ -1,5 +1,7 @@
 config SIBYTE_SB1250
 	bool
+	select CEVT_SB1250
+	select CSRC_SB1250
 	select HW_HAS_PCI
 	select IRQ_CPU
 	select SIBYTE_ENABLE_LDT_IF_PCI
@@ -9,6 +11,8 @@ config SIBYTE_SB1250
 
 config SIBYTE_BCM1120
 	bool
+	select CEVT_SB1250
+	select CSRC_SB1250
 	select IRQ_CPU
 	select SIBYTE_BCM112X
 	select SIBYTE_HAS_ZBUS_PROFILING
@@ -16,6 +20,8 @@ config SIBYTE_BCM1120
 
 config SIBYTE_BCM1125
 	bool
+	select CEVT_SB1250
+	select CSRC_SB1250
 	select HW_HAS_PCI
 	select IRQ_CPU
 	select SIBYTE_BCM112X
@@ -24,6 +30,8 @@ config SIBYTE_BCM1125
 
 config SIBYTE_BCM1125H
 	bool
+	select CEVT_SB1250
+	select CSRC_SB1250
 	select HW_HAS_PCI
 	select IRQ_CPU
 	select SIBYTE_BCM112X
@@ -33,12 +41,16 @@ config SIBYTE_BCM1125H
 
 config SIBYTE_BCM112X
 	bool
+	select CEVT_SB1250
+	select CSRC_SB1250
 	select IRQ_CPU
 	select SIBYTE_SB1xxx_SOC
 	select SIBYTE_HAS_ZBUS_PROFILING
 
 config SIBYTE_BCM1x80
 	bool
+	select CEVT_BCM1480
+	select CSRC_BCM1480
 	select HW_HAS_PCI
 	select IRQ_CPU
 	select SIBYTE_HAS_ZBUS_PROFILING
@@ -47,6 +59,8 @@ config SIBYTE_BCM1x80
 
 config SIBYTE_BCM1x55
 	bool
+	select CEVT_BCM1480
+	select CSRC_BCM1480
 	select HW_HAS_PCI
 	select IRQ_CPU
 	select SIBYTE_SB1xxx_SOC
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index 61790c4bfb6..e28d626255a 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -265,21 +265,6 @@ void __init init_bcm1480_irqs(void)
 	}
 }
 
-
-static irqreturn_t bcm1480_dummy_handler(int irq, void *dev_id)
-{
-	return IRQ_NONE;
-}
-
-static struct irqaction bcm1480_dummy_action = {
-	.handler = bcm1480_dummy_handler,
-	.flags   = 0,
-	.mask    = CPU_MASK_NONE,
-	.name    = "bcm1480-private",
-	.next    = NULL,
-	.dev_id  = 0
-};
-
 /*
  *  init_IRQ is called early in the boot sequence from init/main.c.  It
  *  is responsible for setting up the interrupt mapper and installing the
@@ -308,7 +293,6 @@ static struct irqaction bcm1480_dummy_action = {
 
 void __init arch_init_irq(void)
 {
-
 	unsigned int i, cpu;
 	u64 tmp;
 	unsigned int imask = STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 |
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c
index bbf19bfabcc..1680a68952a 100644
--- a/arch/mips/sibyte/bcm1480/time.c
+++ b/arch/mips/sibyte/bcm1480/time.c
@@ -15,163 +15,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/percpu.h>
-#include <linux/spinlock.h>
+#include <linux/init.h>
 
-#include <asm/addrspace.h>
-#include <asm/time.h>
-#include <asm/io.h>
-
-#include <asm/sibyte/bcm1480_regs.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/bcm1480_int.h>
-#include <asm/sibyte/bcm1480_scd.h>
-
-#include <asm/sibyte/sb1250.h>
-
-
-#define IMR_IP2_VAL	K_BCM1480_INT_MAP_I0
-#define IMR_IP3_VAL	K_BCM1480_INT_MAP_I1
-#define IMR_IP4_VAL	K_BCM1480_INT_MAP_I2
-
-/*
- * The general purpose timer ticks at 1MHz independent if
- * the rest of the system
- */
-static void sibyte_set_mode(enum clock_event_mode mode,
-                           struct clock_event_device *evt)
-{
-	unsigned int cpu = smp_processor_id();
-	void __iomem *timer_cfg, *timer_init;
-
-	timer_cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
-	timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		__raw_writeq(0, timer_cfg);
-		__raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, timer_init);
-		__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-			     timer_cfg);
-		break;
-
-	case CLOCK_EVT_MODE_ONESHOT:
-		/* Stop the timer until we actually program a shot */
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		__raw_writeq(0, timer_cfg);
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
-	case CLOCK_EVT_MODE_RESUME:
-		;
-	}
-}
-
-static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
-{
-	unsigned int cpu = smp_processor_id();
-	void __iomem *timer_init;
-	unsigned int cnt;
-	int res;
-
-	timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-	cnt = __raw_readq(timer_init);
-	cnt += delta;
-	__raw_writeq(cnt, timer_init);
-	res = ((long)(__raw_readq(timer_init) - cnt ) > 0) ? -ETIME : 0;
-
-	return res;
-}
-
-static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
-{
-	unsigned int cpu = smp_processor_id();
-	struct clock_event_device *cd = dev_id;
-	void __iomem *timer_cfg;
-
-	timer_cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
-
-	/* Reset the timer */
-	__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-	             timer_cfg);
-	cd->event_handler(cd);
-
-	return IRQ_HANDLED;
-}
-
-static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
-static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
-static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
-
-void __cpuinit sb1480_clockevent_init(void)
-{
-	unsigned int cpu = smp_processor_id();
-	unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
-	struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
-	struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
-	unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
-
-	BUG_ON(cpu > 3);	/* Only have 4 general purpose timers */
-
-	sprintf(name, "bcm1480-counter %d", cpu);
-	cd->name		= name;
-	cd->features		= CLOCK_EVT_FEAT_PERIODIC |
-				  CLOCK_EVT_FEAT_ONESHOT;
-	clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
-	cd->max_delta_ns	= clockevent_delta2ns(0x7fffff, cd);
-	cd->min_delta_ns	= clockevent_delta2ns(1, cd);
-	cd->rating		= 200;
-	cd->irq			= irq;
-	cd->cpumask		= cpumask_of_cpu(cpu);
-	cd->set_next_event	= sibyte_next_event;
-	cd->set_mode		= sibyte_set_mode;
-	clockevents_register_device(cd);
-
-	bcm1480_mask_irq(cpu, irq);
-
-	/*
-	 * Map timer interrupt to IP[4] of this cpu
-	 */
-	__raw_writeq(IMR_IP4_VAL,
-		     IOADDR(A_BCM1480_IMR_REGISTER(cpu,
-			R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3)));
-
-	bcm1480_unmask_irq(cpu, irq);
-
-	action->handler	= sibyte_counter_handler;
-	action->flags	= IRQF_DISABLED | IRQF_PERCPU;
-	action->name	= name;
-	action->dev_id	= cd;
-	setup_irq(irq, action);
-}
-
-static cycle_t bcm1480_hpt_read(void)
-{
-	return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
-}
-
-struct clocksource bcm1480_clocksource = {
-	.name	= "zbbus-cycles",
-	.rating	= 200,
-	.read	= bcm1480_hpt_read,
-	.mask	= CLOCKSOURCE_MASK(64),
-	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-void __init sb1480_clocksource_init(void)
-{
-	struct clocksource *cs = &bcm1480_clocksource;
-	unsigned int plldiv;
-	unsigned long zbbus;
-
-	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
-	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
-	clocksource_set_clock(cs, zbbus);
-	clocksource_register(cs);
-}
+extern void sb1480_clockevent_init(void);
+extern void sb1480_clocksource_init(void);
 
 void __init plat_time_init(void)
 {
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index 52d18fc91f3..eac9065ffe0 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -236,20 +236,6 @@ void __init init_sb1250_irqs(void)
 }
 
 
-static irqreturn_t  sb1250_dummy_handler(int irq, void *dev_id)
-{
-	return IRQ_NONE;
-}
-
-static struct irqaction sb1250_dummy_action = {
-	.handler = sb1250_dummy_handler,
-	.flags   = 0,
-	.mask    = CPU_MASK_NONE,
-	.name    = "sb1250-private",
-	.next    = NULL,
-	.dev_id  = 0
-};
-
 /*
  *  arch_init_irq is called early in the boot sequence from init/main.c via
  *  init_IRQ.  It is responsible for setting up the interrupt mapper and
diff --git a/arch/mips/sibyte/sb1250/time.c b/arch/mips/sibyte/sb1250/time.c
index 95ad34e3fba..68337bf7a5a 100644
--- a/arch/mips/sibyte/sb1250/time.c
+++ b/arch/mips/sibyte/sb1250/time.c
@@ -15,195 +15,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include <linux/init.h>
 
-/*
- * These are routines to set up and handle interrupts from the
- * sb1250 general purpose timer 0.  We're using the timer as a
- * system clock, so we set it up to run at 100 Hz.  On every
- * interrupt, we update our idea of what the time of day is,
- * then call do_timer() in the architecture-independent kernel
- * code to do general bookkeeping (e.g. update jiffies, run
- * bottom halves, etc.)
- */
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/kernel_stat.h>
-
-#include <asm/irq.h>
-#include <asm/addrspace.h>
-#include <asm/time.h>
-#include <asm/io.h>
-
-#include <asm/sibyte/sb1250.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_int.h>
-#include <asm/sibyte/sb1250_scd.h>
-
-
-#define IMR_IP2_VAL	K_INT_MAP_I0
-#define IMR_IP3_VAL	K_INT_MAP_I1
-#define IMR_IP4_VAL	K_INT_MAP_I2
-
-#define SB1250_HPT_NUM		3
-#define SB1250_HPT_VALUE	M_SCD_TIMER_CNT /* max value */
-
-
-/*
- * The general purpose timer ticks at 1 Mhz independent if
- * the rest of the system
- */
-static void sibyte_set_mode(enum clock_event_mode mode,
-                           struct clock_event_device *evt)
-{
-	unsigned int cpu = smp_processor_id();
-	void __iomem *timer_cfg, *timer_init;
-
-	timer_cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
-	timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-
-	switch(mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		__raw_writeq(0, timer_cfg);
-		__raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, timer_init);
-		__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-			     timer_cfg);
-		break;
-
-	case CLOCK_EVT_MODE_ONESHOT:
-		/* Stop the timer until we actually program a shot */
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		__raw_writeq(0, timer_cfg);
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
-	case CLOCK_EVT_MODE_RESUME:
-		;
-	}
-}
-
-static int
-sibyte_next_event(unsigned long delta, struct clock_event_device *evt)
-{
-	unsigned int cpu = smp_processor_id();
-	void __iomem *timer_cfg, *timer_init;
-
-	timer_cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
-	timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-
-	__raw_writeq(0, timer_cfg);
-	__raw_writeq(delta, timer_init);
-	__raw_writeq(M_SCD_TIMER_ENABLE, timer_cfg);
-
-	return 0;
-}
-
-static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
-{
-	unsigned int cpu = smp_processor_id();
-	struct clock_event_device *cd = dev_id;
-
-	/* ACK interrupt */
-	____raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-		       IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
-
-	cd->event_handler(cd);
-
-	return IRQ_HANDLED;
-}
-
-static struct irqaction sibyte_irqaction = {
-	.handler	= sibyte_counter_handler,
-	.flags		= IRQF_DISABLED | IRQF_PERCPU,
-	.name		= "timer",
-};
-
-static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
-static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
-static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
-
-void __cpuinit sb1250_clockevent_init(void)
-{
-	unsigned int cpu = smp_processor_id();
-	unsigned int irq = K_INT_TIMER_0 + cpu;
-	struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
-	struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
-	unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
-
-	/* Only have 4 general purpose timers, and we use last one as hpt */
-	BUG_ON(cpu > 2);
-
-	sprintf(name, "bcm1480-counter %d", cpu);
-	cd->name		= name;
-	cd->features		= CLOCK_EVT_FEAT_PERIODIC |
-				  CLOCK_EVT_FEAT_ONESHOT;
-	clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
-	cd->max_delta_ns	= clockevent_delta2ns(0x7fffff, cd);
-	cd->min_delta_ns	= clockevent_delta2ns(1, cd);
-	cd->rating		= 200;
-	cd->irq			= irq;
-	cd->cpumask		= cpumask_of_cpu(cpu);
-	cd->set_next_event	= sibyte_next_event;
-	cd->set_mode		= sibyte_set_mode;
-	clockevents_register_device(cd);
-
-	sb1250_mask_irq(cpu, irq);
-
-	/* Map the timer interrupt to ip[4] of this cpu */
-	__raw_writeq(IMR_IP4_VAL,
-		     IOADDR(A_IMR_REGISTER(cpu, R_IMR_INTERRUPT_MAP_BASE) +
-			    (irq << 3)));
-	cd->cpumask = cpumask_of_cpu(0);
-
-	sb1250_unmask_irq(cpu, irq);
-
-	action->handler	= sibyte_counter_handler;
-	action->flags	= IRQF_DISABLED | IRQF_PERCPU;
-	action->name	= name;
-	action->dev_id	= cd;
-	setup_irq(irq, &sibyte_irqaction);
-}
-
-/*
- * The HPT is free running from SB1250_HPT_VALUE down to 0 then starts over
- * again.
- */
-static cycle_t sb1250_hpt_read(void)
-{
-	unsigned int count;
-
-	count = G_SCD_TIMER_CNT(__raw_readq(IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM, R_SCD_TIMER_CNT))));
-
-	return SB1250_HPT_VALUE - count;
-}
-
-struct clocksource bcm1250_clocksource = {
-	.name	= "MIPS",
-	.rating	= 200,
-	.read	= sb1250_hpt_read,
-	.mask	= CLOCKSOURCE_MASK(23),
-	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-void __init sb1250_clocksource_init(void)
-{
-	struct clocksource *cs = &bcm1250_clocksource;
-
-	/* Setup hpt using timer #3 but do not enable irq for it */
-	__raw_writeq(0,
-		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
-						 R_SCD_TIMER_CFG)));
-	__raw_writeq(SB1250_HPT_VALUE,
-		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
-						 R_SCD_TIMER_INIT)));
-	__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
-		     IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
-						 R_SCD_TIMER_CFG)));
-
-	clocksource_set_clock(cs, V_SCD_TIMER_FREQ);
-	clocksource_register(cs);
-}
+extern void sb1250_clocksource_init(void);
+extern void sb1250_clockevent_init(void);
 
 void __init plat_time_init(void)
 {
diff --git a/arch/mips/sni/time.c b/arch/mips/sni/time.c
index 60bc62ef093..6f339af08d2 100644
--- a/arch/mips/sni/time.c
+++ b/arch/mips/sni/time.c
@@ -1,6 +1,7 @@
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/time.h>
+#include <linux/clockchips.h>
 
 #include <asm/i8253.h>
 #include <asm/sni.h>
@@ -80,7 +81,7 @@ static void __init sni_a20r_timer_setup(void)
 	unsigned int cpu = smp_processor_id();
 
 	cd->cpumask             = cpumask_of_cpu(cpu);
-
+	clockevents_register_device(cd);
 	action->dev_id = cd;
 	setup_irq(SNI_A20R_IRQ_TIMER, &a20r_irqaction);
 }
@@ -169,8 +170,6 @@ void __init plat_time_init(void)
 
 	mips_hpt_frequency = r4k_tick * HZ;
 
-	setup_pit_timer();
-
 	switch (sni_brd_type) {
 	case SNI_BRD_10:
 	case SNI_BRD_10NEW:
diff --git a/include/asm-mips/i8253.h b/include/asm-mips/i8253.h
index affb32ce4af..778b2f02390 100644
--- a/include/asm-mips/i8253.h
+++ b/include/asm-mips/i8253.h
@@ -10,21 +10,6 @@
 #define PIT_CH0			0x40
 #define PIT_CH2			0x42
 
-/* i8259A PIC registers */
-#define PIC_MASTER_CMD		0x20
-#define PIC_MASTER_IMR		0x21
-#define PIC_MASTER_ISR		PIC_MASTER_CMD
-#define PIC_MASTER_POLL		PIC_MASTER_ISR
-#define PIC_MASTER_OCW3		PIC_MASTER_ISR
-#define PIC_SLAVE_CMD		0xa0
-#define PIC_SLAVE_IMR		0xa1
-
-/* i8259A PIC related value */
-#define PIC_CASCADE_IR		2
-#define MASTER_ICW4_DEFAULT	0x01
-#define SLAVE_ICW4_DEFAULT	0x01
-#define PIC_ICW4_AEOI		2
-
 extern void setup_pit_timer(void);
 
 #endif /* __ASM_I8253_H */
diff --git a/include/asm-mips/mach-au1x00/timex.h b/include/asm-mips/mach-au1x00/timex.h
deleted file mode 100644
index e3ada66cb63..00000000000
--- a/include/asm-mips/mach-au1x00/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003 by Ralf Baechle
- */
-#ifndef __ASM_MACH_AU1X00_TIMEX_H
-#define __ASM_MACH_AU1X00_TIMEX_H
-
-#define CLOCK_TICK_RATE		((HZ * 100000UL) / 2)
-
-#endif /* __ASM_MACH_AU1X00_TIMEX_H */
diff --git a/include/asm-mips/mach-cobalt/irq.h b/include/asm-mips/mach-cobalt/irq.h
index 179d0e850b5..57c8c9ac585 100644
--- a/include/asm-mips/mach-cobalt/irq.h
+++ b/include/asm-mips/mach-cobalt/irq.h
@@ -35,7 +35,7 @@
  *	4 - ethernet
  *	5 - 16550 UART
  *	6 - cascade i8259
- *	7 - CP0 counter (unused)
+ *	7 - CP0 counter
  */
 #define MIPS_CPU_IRQ_BASE		16
 
@@ -48,7 +48,6 @@
 #define SCSI_IRQ			(MIPS_CPU_IRQ_BASE + 5)
 #define I8259_CASCADE_IRQ		(MIPS_CPU_IRQ_BASE + 6)
 
-
 #define GT641XX_IRQ_BASE		24
 
 #include <asm/irq_gt641xx.h>
diff --git a/include/asm-mips/mach-generic/timex.h b/include/asm-mips/mach-generic/timex.h
deleted file mode 100644
index 48b4cfaa0d5..00000000000
--- a/include/asm-mips/mach-generic/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003, 2005 by Ralf Baechle
- */
-#ifndef __ASM_MACH_GENERIC_TIMEX_H
-#define __ASM_MACH_GENERIC_TIMEX_H
-
-#define CLOCK_TICK_RATE		500000
-
-#endif /* __ASM_MACH_GENERIC_TIMEX_H */
diff --git a/include/asm-mips/mach-jazz/timex.h b/include/asm-mips/mach-jazz/timex.h
deleted file mode 100644
index 93affa33dfa..00000000000
--- a/include/asm-mips/mach-jazz/timex.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003 by Ralf Baechle
- */
-#ifndef __ASM_MACH_JAZZ_TIMEX_H
-#define __ASM_MACH_JAZZ_TIMEX_H
-
-/*
- * Jazz is still using the R4030 100Hz counter
- */
-#define CLOCK_TICK_RATE		100
-
-#endif /* __ASM_MACH_JAZZ_TIMEX_H */
diff --git a/include/asm-mips/mach-qemu/timex.h b/include/asm-mips/mach-qemu/timex.h
deleted file mode 100644
index cd543693fb0..00000000000
--- a/include/asm-mips/mach-qemu/timex.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005 Daniel Jacobowitz
- */
-#ifndef __ASM_MACH_QEMU_TIMEX_H
-#define __ASM_MACH_QEMU_TIMEX_H
-
-/*
- * We use a simulated i8254 PIC...
- */
-#define CLOCK_TICK_RATE		1193182
-
-#endif /* __ASM_MACH_QEMU_TIMEX_H */
diff --git a/include/asm-mips/mach-rm/timex.h b/include/asm-mips/mach-rm/timex.h
deleted file mode 100644
index 11ff6cb0f21..00000000000
--- a/include/asm-mips/mach-rm/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003, 2005 by Ralf Baechle
- */
-#ifndef __ASM_MACH_RM200_TIMEX_H
-#define __ASM_MACH_RM200_TIMEX_H
-
-#define CLOCK_TICK_RATE		1193182
-
-#endif /* __ASM_MACH_RM200_TIMEX_H */
diff --git a/include/asm-mips/time.h b/include/asm-mips/time.h
index 0a6bc7dc158..ee1663e64da 100644
--- a/include/asm-mips/time.h
+++ b/include/asm-mips/time.h
@@ -10,15 +10,10 @@
  * 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.
- *
- * Please refer to Documentation/mips/time.README.
  */
 #ifndef _ASM_TIME_H
 #define _ASM_TIME_H
 
-#include <linux/interrupt.h>
-#include <linux/linkage.h>
-#include <linux/ptrace.h>
 #include <linux/rtc.h>
 #include <linux/spinlock.h>
 #include <linux/clockchips.h>
@@ -38,25 +33,12 @@ extern int rtc_mips_set_mmss(unsigned long);
 /*
  * Timer interrupt functions.
  * mips_timer_state is needed for high precision timer calibration.
- * mips_timer_ack may be NULL if the interrupt is self-recoverable.
  */
 extern int (*mips_timer_state)(void);
 
 /*
- * High precision timer clocksource.
- * If .read is NULL, an R4k-compatible timer setup is attempted.
- */
-extern struct clocksource clocksource_mips;
-
-/*
- * profiling and process accouting is done separately in local_timer_interrupt
- */
-extern void local_timer_interrupt(int irq, void *dev_id);
-
-/*
  * board specific routines required by time_init().
  */
-struct irqaction;
 extern void plat_time_init(void);
 
 /*
diff --git a/include/asm-mips/timex.h b/include/asm-mips/timex.h
index 87c68ae76ff..5816ad1569d 100644
--- a/include/asm-mips/timex.h
+++ b/include/asm-mips/timex.h
@@ -13,27 +13,12 @@
 #include <asm/mipsregs.h>
 
 /*
- * This is the frequency of the timer used for Linux's timer interrupt.
- * The value should be defined as accurate as possible or under certain
- * circumstances Linux timekeeping might become inaccurate or fail.
- *
- * For many system the exact clockrate of the timer isn't known but due to
- * the way this value is used we can get away with a wrong value as long
- * as this value is:
- *
- *  - a multiple of HZ
- *  - a divisor of the actual rate
- *
- * 500000 is a good such cheat value.
- *
- * The obscure number 1193182 is the same as used by the original i8254
- * time in legacy PC hardware; the chip unfortunately also found in a
- * bunch of MIPS systems.  The last remaining user of the i8254 for the
- * timer interrupt is the RM200; it's a very standard system so there is
- * no reason to make this a separate architecture.
+ * This is the clock rate of the i8253 PIT.  A MIPS system may not have
+ * a PIT by the symbol is used all over the kernel including some APIs.
+ * So keeping it defined to the number for the PIT is the only sane thing
+ * for now.
  */
-
-#include <timex.h>
+#define CLOCK_TICK_RATE 1193182
 
 /*
  * Standard way to access the cycle counter.