linux-kernel - [M68KNOMMU 02/06]: use setup_irq() in ColdFire simple timer

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Date:	Thu, 26 Jul 2007 00:06:25 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	linux-kernel@...r.kernel.org
Cc:	gerg@...inux.org
Subject: [M68KNOMMU 02/06]: use setup_irq() in ColdFire simple timer

Timer setup is done early, cannot use request_irq(), change to
using setup_irq() in the Coldfire simple timer code.

This is also a good time to simplify the functional setup of
ColdFire timers, to clean up external use of the functions
all over the board/cpu config code.

Signed-off-by: Greg Ungerer <gerg@...inux.org>
---


diff -Naur linux-2.6.22/arch/m68knommu/platform/5307/timers.c linux-2.6.22-uc0/arch/m68knommu/platform/5307/timers.c
--- linux-2.6.22/arch/m68knommu/platform/5307/timers.c	2007-07-12 15:23:02.000000000 +1000
+++ linux-2.6.22-uc0/arch/m68knommu/platform/5307/timers.c	2007-07-12 15:27:01.000000000 +1000
@@ -3,18 +3,17 @@
 /*
  *	timers.c -- generic ColdFire hardware timer support.
  *
- *	Copyright (C) 1999-2006, Greg Ungerer (gerg@...pgear.com)
+ *	Copyright (C) 1999-2007, Greg Ungerer (gerg@...pgear.com)
  */
 
 /***************************************************************************/
 
 #include <linux/kernel.h>
+#include <linux/init.h>
 #include <linux/sched.h>
-#include <linux/param.h>
 #include <linux/interrupt.h>
-#include <linux/init.h>
+#include <linux/irq.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <asm/traps.h>
 #include <asm/machdep.h>
 #include <asm/coldfire.h>
@@ -54,25 +53,36 @@
 
 /***************************************************************************/
 
-void coldfire_tick(void)
+static irqreturn_t hw_tick(int irq, void *dummy)
 {
 	/* Reset the ColdFire timer */
 	__raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, TA(MCFTIMER_TER));
+
+	return arch_timer_interrupt(irq, dummy);
 }
 
 /***************************************************************************/
 
+static struct irqaction coldfire_timer_irq = {
+	.name	 = "timer",
+	.flags	 = IRQF_DISABLED | IRQF_TIMER,
+	.handler = hw_tick,
+};
+
+/***************************************************************************/
+
 static int ticks_per_intr;
 
-void coldfire_timer_init(irq_handler_t handler)
+void hw_timer_init(void)
 {
+	setup_irq(mcf_timervector, &coldfire_timer_irq);
+
 	__raw_writew(MCFTIMER_TMR_DISABLE, TA(MCFTIMER_TMR));
 	ticks_per_intr = (MCF_BUSCLK / 16) / HZ;
 	__raw_writetrr(ticks_per_intr - 1, TA(MCFTIMER_TRR));
 	__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
 		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR));
 
-	request_irq(mcf_timervector, handler, IRQF_DISABLED, "timer", NULL);
 	mcf_settimericr(1, mcf_timerlevel);
 
 #ifdef CONFIG_HIGHPROFILE
@@ -82,7 +92,7 @@
 
 /***************************************************************************/
 
-unsigned long coldfire_timer_offset(void)
+unsigned long hw_timer_offset(void)
 {
 	unsigned long tcn, offset;
 
-
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