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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-lh7a40x/time.c
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/mach-lh7a40x/time.c')
-rw-r--r--arch/arm/mach-lh7a40x/time.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mach-lh7a40x/time.c b/arch/arm/mach-lh7a40x/time.c
new file mode 100644
index 00000000000..51e1c814b40
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+++ b/arch/arm/mach-lh7a40x/time.c
@@ -0,0 +1,75 @@
+/*
+ * arch/arm/mach-lh7a40x/time.c
+ *
+ * Copyright (C) 2004 Logic Product Development
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/leds.h>
+
+#include <asm/mach/time.h>
+#include "common.h"
+
+#if HZ < 100
+# define TIMER_CONTROL TIMER_CONTROL2
+# define TIMER_LOAD TIMER_LOAD2
+# define TIMER_CONSTANT (508469/HZ)
+# define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC | TIMER_C_508KHZ)
+# define TIMER_EOI TIMER_EOI2
+# define TIMER_IRQ IRQ_T2UI
+#else
+# define TIMER_CONTROL TIMER_CONTROL3
+# define TIMER_LOAD TIMER_LOAD3
+# define TIMER_CONSTANT (3686400/HZ)
+# define TIMER_MODE (TIMER_C_ENABLE | TIMER_C_PERIODIC)
+# define TIMER_EOI TIMER_EOI3
+# define TIMER_IRQ IRQ_T3UI
+#endif
+
+static irqreturn_t
+lh7a40x_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ write_seqlock(&xtime_lock);
+
+ TIMER_EOI = 0;
+ timer_tick(regs);
+
+ write_sequnlock(&xtime_lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction lh7a40x_timer_irq = {
+ .name = "LHA740x Timer Tick",
+ .flags = SA_INTERRUPT,
+ .handler = lh7a40x_timer_interrupt
+};
+
+static void __init lh7a40x_timer_init(void)
+{
+ /* Stop/disable all timers */
+ TIMER_CONTROL1 = 0;
+ TIMER_CONTROL2 = 0;
+ TIMER_CONTROL3 = 0;
+
+ setup_irq (TIMER_IRQ, &lh7a40x_timer_irq);
+
+ TIMER_LOAD = TIMER_CONSTANT;
+ TIMER_CONTROL = TIMER_MODE;
+}
+
+struct sys_timer lh7a40x_timer = {
+ .init = &lh7a40x_timer_init,
+};