From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/arm/mach-footbridge/isa-timer.c | 40 ++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 arch/arm/mach-footbridge/isa-timer.c

(limited to 'arch/arm/mach-footbridge/isa-timer.c')

diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c
new file mode 100644
index 00000000..d9301dd5
--- /dev/null
+++ b/arch/arm/mach-footbridge/isa-timer.c
@@ -0,0 +1,40 @@
+/*
+ *  linux/arch/arm/mach-footbridge/isa-timer.c
+ *
+ *  Copyright (C) 1998 Russell King.
+ *  Copyright (C) 1998 Phil Blundell
+ */
+#include <linux/clockchips.h>
+#include <linux/i8253.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include <linux/timex.h>
+
+#include <asm/irq.h>
+#include <asm/mach/time.h>
+
+#include "common.h"
+
+static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *ce = dev_id;
+	ce->event_handler(ce);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction pit_timer_irq = {
+	.name		= "pit",
+	.handler	= pit_timer_interrupt,
+	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+	.dev_id		= &i8253_clockevent,
+};
+
+void __init isa_timer_init(void)
+{
+	clocksource_i8253_init();
+
+	setup_irq(i8253_clockevent.irq, &pit_timer_irq);
+	clockevent_i8253_init(false);
+}
-- 
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