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authorwanzongshun <mcuos.com@gmail.com>2008-12-03 03:55:38 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-12-03 21:57:16 +0000
commit7ec80ddf0455ff3854a5ca524952d91b5eb676b2 (patch)
treebe9c2a70b771a9d94844b7f37e63471e7bbaff6a /arch/arm/mach-w90x900/time.c
parentc5b84b3bb0c055d70dc9f1b5e900378bc9d059ea (diff)
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[ARM] 5338/1: Add Nuvoton W90P910 Platform support
Add Nuvoton W90X900 ARM9 plat support to linux arm tree, Now, this patch include only W90P910 EVB of W90P910 CPU, Its driver is nothing. Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-w90x900/time.c')
-rw-r--r--arch/arm/mach-w90x900/time.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/arm/mach-w90x900/time.c b/arch/arm/mach-w90x900/time.c
new file mode 100644
index 0000000..3a69e38
--- /dev/null
+++ b/arch/arm/mach-w90x900/time.c
@@ -0,0 +1,80 @@
+/*
+ * linux/arch/arm/mach-w90x900/time.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/time.c by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * 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/sched.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/time.h>
+
+#include <mach/system.h>
+#include <mach/map.h>
+#include <mach/regs-timer.h>
+
+static unsigned long w90x900_gettimeoffset(void)
+{
+ return 0;
+}
+
+/*IRQ handler for the timer*/
+
+static irqreturn_t
+w90x900_timer_interrupt(int irq, void *dev_id)
+{
+ timer_tick();
+ __raw_writel(0x01, REG_TISR); /* clear TIF0 */
+ return IRQ_HANDLED;
+}
+
+static struct irqaction w90x900_timer_irq = {
+ .name = "w90x900 Timer Tick",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = w90x900_timer_interrupt,
+};
+
+/*Set up timer reg.*/
+
+static void w90x900_timer_setup(void)
+{
+ __raw_writel(0, REG_TCSR0);
+ __raw_writel(0, REG_TCSR1);
+ __raw_writel(0, REG_TCSR2);
+ __raw_writel(0, REG_TCSR3);
+ __raw_writel(0, REG_TCSR4);
+ __raw_writel(0x1F, REG_TISR);
+ __raw_writel(15000000/(100 * 100), REG_TICR0);
+ __raw_writel(0x68000063, REG_TCSR0);
+}
+
+static void __init w90x900_timer_init(void)
+{
+ w90x900_timer_setup();
+ setup_irq(IRQ_TIMER0, &w90x900_timer_irq);
+}
+
+struct sys_timer w90x900_timer = {
+ .init = w90x900_timer_init,
+ .offset = w90x900_gettimeoffset,
+ .resume = w90x900_timer_setup
+};