[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx

* architecture specific details are handled in asm/arch/time.h
* ARCH_IOP13XX now selects PLAT_IOP
* as suggested by Lennert use ifdef CONFIG_XSCALE to skip the cp_wait on
XSC3

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 6 insertions, 97 deletions

diff --git a/arch/arm/mach-iop13xx/Makefile b/arch/arm/mach-iop13xx/Makefile
index c3d6c08f2d4c..4185e0586c33 100644
--- a/arch/arm/mach-iop13xx/Makefile
+++ b/arch/arm/mach-iop13xx/Makefile
@@ -5,7 +5,6 @@ obj-			:=
 
 obj-$(CONFIG_ARCH_IOP13XX) += setup.o
 obj-$(CONFIG_ARCH_IOP13XX) += irq.o
-obj-$(CONFIG_ARCH_IOP13XX) += time.o
 obj-$(CONFIG_ARCH_IOP13XX) += pci.o
 obj-$(CONFIG_ARCH_IOP13XX) += io.o
 obj-$(CONFIG_MACH_IQ81340SC) += iq81340sc.o
diff --git a/arch/arm/mach-iop13xx/iq81340mc.c b/arch/arm/mach-iop13xx/iq81340mc.c
index 2a1bbfe9896f..a519d707571c 100644
--- a/arch/arm/mach-iop13xx/iq81340mc.c
+++ b/arch/arm/mach-iop13xx/iq81340mc.c
@@ -25,6 +25,7 @@
 #include <asm/mach/arch.h>
 #include <asm/arch/pci.h>
 #include <asm/mach/time.h>
+#include <asm/arch/time.h>
 
 extern int init_atu; /* Flag to select which ATU(s) to initialize / disable */
 
@@ -78,12 +79,12 @@ static void __init iq81340mc_init(void)
 
 static void __init iq81340mc_timer_init(void)
 {
-        iop13xx_init_time(400000000);
+        iop_init_time(400000000);
 }
 
 static struct sys_timer iq81340mc_timer = {
        .init       = iq81340mc_timer_init,
-       .offset     = iop13xx_gettimeoffset,
+       .offset     = iop_gettimeoffset,
 };
 
 MACHINE_START(IQ81340MC, "Intel IQ81340MC")
diff --git a/arch/arm/mach-iop13xx/iq81340sc.c b/arch/arm/mach-iop13xx/iq81340sc.c
index 5ad2b62c9bfd..0e71fbcabe00 100644
--- a/arch/arm/mach-iop13xx/iq81340sc.c
+++ b/arch/arm/mach-iop13xx/iq81340sc.c
@@ -25,6 +25,7 @@
 #include <asm/mach/arch.h>
 #include <asm/arch/pci.h>
 #include <asm/mach/time.h>
+#include <asm/arch/time.h>
 
 extern int init_atu;
 
@@ -80,12 +81,12 @@ static void __init iq81340sc_init(void)
 
 static void __init iq81340sc_timer_init(void)
 {
-        iop13xx_init_time(400000000);
+        iop_init_time(400000000);
 }
 
 static struct sys_timer iq81340sc_timer = {
        .init       = iq81340sc_timer_init,
-       .offset     = iop13xx_gettimeoffset,
+       .offset     = iop_gettimeoffset,
 };
 
 MACHINE_START(IQ81340SC, "Intel IQ81340SC")
diff --git a/arch/arm/mach-iop13xx/time.c b/arch/arm/mach-iop13xx/time.c
deleted file mode 100644
index fc9d9d9a8429..000000000000
--- a/arch/arm/mach-iop13xx/time.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * arch/arm/mach-iop13xx/time.c
- *
- * Timer code for IOP13xx (copied from IOP32x/IOP33x implementation)
- *
- * Author: Deepak Saxena <dsaxena@mvista.com>
- *
- * Copyright 2002-2003 MontaVista Software Inc.
- *
- * 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/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-
-static unsigned long ticks_per_jiffy;
-static unsigned long ticks_per_usec;
-static unsigned long next_jiffy_time;
-
-static inline u32 read_tcr1(void)
-{
-        u32 val;
-        asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
-        return val;
-}
-
-unsigned long iop13xx_gettimeoffset(void)
-{
-        unsigned long offset;
-
-        offset = next_jiffy_time - read_tcr1();
-
-        return offset / ticks_per_usec;
-}
-
-static irqreturn_t
-iop13xx_timer_interrupt(int irq, void *dev_id)
-{
-        write_seqlock(&xtime_lock);
-
-        asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (1));
-
-        while ((signed long)(next_jiffy_time - read_tcr1())
-                                                        >= ticks_per_jiffy) {
-                timer_tick();
-                next_jiffy_time -= ticks_per_jiffy;
-        }
-
-        write_sequnlock(&xtime_lock);
-
-        return IRQ_HANDLED;
-}
-
-static struct irqaction iop13xx_timer_irq = {
-        .name           = "IOP13XX Timer Tick",
-        .handler        = iop13xx_timer_interrupt,
-        .flags          = IRQF_DISABLED | IRQF_TIMER,
-};
-
-void __init iop13xx_init_time(unsigned long tick_rate)
-{
-        u32 timer_ctl;
-
-        ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
-        ticks_per_usec = tick_rate / 1000000;
-        next_jiffy_time = 0xffffffff;
-
-        timer_ctl = IOP13XX_TMR_EN | IOP13XX_TMR_PRIVILEGED |
-                        IOP13XX_TMR_RELOAD | IOP13XX_TMR_RATIO_1_1;
-
-        /*
-         * We use timer 0 for our timer interrupt, and timer 1 as
-         * monotonic counter for tracking missed jiffies.
-         */
-        asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (ticks_per_jiffy - 1));
-        asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (timer_ctl));
-        asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (0xffffffff));
-        asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (timer_ctl));
-
-        setup_irq(IRQ_IOP13XX_TIMER0, &iop13xx_timer_irq);
-}