[ARM] 3823/1: iop3xx: switch iop32x/iop33x over to shared time code

Switch the iop32x and iop33x code over to the common time implementation,
and remove the (nearly identical) iop32x and iop33x time implementations.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 12 insertions, 108 deletions

diff --git a/arch/arm/mach-iop33x/Makefile b/arch/arm/mach-iop33x/Makefile
index 6c74f13b1139..f825cee57d9f 100644
--- a/arch/arm/mach-iop33x/Makefile
+++ b/arch/arm/mach-iop33x/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-obj-y                   := setup.o irq.o time.o
+obj-y                   := setup.o irq.o
 obj-m                   :=
 obj-n                   :=
 obj-                    :=
diff --git a/arch/arm/mach-iop33x/setup.c b/arch/arm/mach-iop33x/setup.c
index ad737d6582b5..7cf5015436f3 100644
--- a/arch/arm/mach-iop33x/setup.c
+++ b/arch/arm/mach-iop33x/setup.c
@@ -28,6 +28,7 @@
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
+#include <asm/mach/time.h>
 #include <asm/hardware/iop3xx.h>
 
 #define IOP331_UART_XTAL 33334000
@@ -118,9 +119,18 @@ void __init iop33x_init(void)
 
 #ifdef CONFIG_ARCH_IOP33X
 extern void iop331_init_irq(void);
-extern struct sys_timer iop331_timer;
 #endif
 
+static void __init iop3xx_timer_init(void)
+{
+        iop3xx_init_time(IOP331_TICK_RATE);
+}
+
+struct sys_timer iop331_timer = {
+        .init           = iop3xx_timer_init,
+        .offset         = iop3xx_gettimeoffset,
+};
+
 #if defined(CONFIG_ARCH_IQ80331)
 MACHINE_START(IQ80331, "Intel IQ80331")
         /* Maintainer: Intel Corp. */
diff --git a/arch/arm/mach-iop33x/time.c b/arch/arm/mach-iop33x/time.c
deleted file mode 100644
index d839cd0d926e..000000000000
--- a/arch/arm/mach-iop33x/time.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * arch/arm/mach-iop33x/time.c
- *
- * Timer code for IOP331 based systems
- *
- * Author: Dave Jiang <dave.jiang@intel.com>
- *
- * Copyright 2003 Intel Corp.
- *
- *  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.
- */
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/timex.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-
-static inline unsigned long get_elapsed(void)
-{
-        return LATCH - *IOP331_TU_TCR0;
-}
-
-static unsigned long iop331_gettimeoffset(void)
-{
-        unsigned long elapsed, usec;
-        u32 tisr1, tisr2;
-
-        /*
-         * If an interrupt was pending before we read the timer,
-         * we've already wrapped.  Factor this into the time.
-         * If an interrupt was pending after we read the timer,
-         * it may have wrapped between checking the interrupt
-         * status and reading the timer.  Re-read the timer to
-         * be sure its value is after the wrap.
-         */
-
-        asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr1));
-        elapsed = get_elapsed();
-        asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr2));
-
-        if(tisr1 & 1)
-                elapsed += LATCH;
-        else if (tisr2 & 1)
-                elapsed = LATCH + get_elapsed();
-
-        /*
-         * Now convert them to usec.
-         */
-        usec = (unsigned long)(elapsed / (CLOCK_TICK_RATE/1000000));
-
-        return usec;
-}
-
-static irqreturn_t
-iop331_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
-        u32 tisr;
-
-        write_seqlock(&xtime_lock);
-
-        asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr));
-        tisr |= 1;
-        asm volatile("mcr p6, 0, %0, c6, c1, 0" : : "r" (tisr));
-
-        timer_tick(regs);
-
-        write_sequnlock(&xtime_lock);
-        return IRQ_HANDLED;
-}
-
-static struct irqaction iop331_timer_irq = {
-        .name           = "IOP331 Timer Tick",
-        .handler        = iop331_timer_interrupt,
-        .flags          = IRQF_DISABLED | IRQF_TIMER,
-};
-
-static void __init iop331_timer_init(void)
-{
-        u32 timer_ctl;
-
-        setup_irq(IRQ_IOP331_TIMER0, &iop331_timer_irq);
-
-        timer_ctl = IOP331_TMR_EN | IOP331_TMR_PRIVILEGED | IOP331_TMR_RELOAD |
-                        IOP331_TMR_RATIO_1_1;
-
-        asm volatile("mcr p6, 0, %0, c4, c1, 0" : : "r" (LATCH));
-
-        asm volatile("mcr p6, 0, %0, c0, c1, 0" : : "r" (timer_ctl));
-
-}
-
-struct sys_timer iop331_timer = {
-        .init           = iop331_timer_init,
-        .offset         = iop331_gettimeoffset,
-};