aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-l7200/include/mach/time.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:38:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:38:42 -0700
commit49b75b87ce2dfbd99e59a50c3681b154d07e3a22 (patch)
treef14e1da19a13d87a512f9043c2f37fd75dd122b3 /arch/arm/mach-l7200/include/mach/time.h
parentf1c7f79b6ab4f7ada002a0fae47f462ede6b6857 (diff)
parent097d9eb537ff4d88b74c3fe67392e27c478ca3c5 (diff)
Merge branch 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5177/1: arm/mach-sa1100/Makefile: remove CONFIG_SA1100_USB [ARM] 5166/1: magician: add MAINTAINERS entry [ARM] fix pnx4008 build errors [ARM] Fix SMP booting with non-zero PHYS_OFFSET [ARM] 5185/1: Fix spi num_chipselect for lubbock [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach [ARM] Add support for arch/arm/mach-*/include and arch/arm/plat-*/include [ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead [ARM] Eliminate useless includes of asm/mach-types.h [ARM] Fix circular include dependency with IRQ headers avr32: Use <mach/foo.h> instead of <asm/arch/foo.h> avr32: Introduce arch/avr32/mach-*/include/mach avr32: Move include/asm-avr32 to arch/avr32/include/asm [ARM] sa1100_wdt: use reset_status to remember watchdog reset status [ARM] pxa: introduce reset_status and clear_reset_status for driver's usage [ARM] pxa: introduce reset.h for reset specific header information
Diffstat (limited to 'arch/arm/mach-l7200/include/mach/time.h')
-rw-r--r--arch/arm/mach-l7200/include/mach/time.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/mach-l7200/include/mach/time.h b/arch/arm/mach-l7200/include/mach/time.h
new file mode 100644
index 00000000000..061771c2c2b
--- /dev/null
+++ b/arch/arm/mach-l7200/include/mach/time.h
@@ -0,0 +1,73 @@
+/*
+ * arch/arm/mach-l7200/include/mach/time.h
+ *
+ * Copyright (C) 2000 Rob Scott (rscott@mtrob.fdns.net)
+ * Steve Hill (sjhill@cotw.com)
+ *
+ * Changelog:
+ * 01-02-2000 RS Created l7200 version, derived from rpc code
+ * 05-03-2000 SJH Complete rewrite
+ */
+#ifndef _ASM_ARCH_TIME_H
+#define _ASM_ARCH_TIME_H
+
+#include <mach/irqs.h>
+
+/*
+ * RTC base register address
+ */
+#define RTC_BASE (IO_BASE_2 + 0x2000)
+
+/*
+ * RTC registers
+ */
+#define RTC_RTCDR (*(volatile unsigned char *) (RTC_BASE + 0x000))
+#define RTC_RTCMR (*(volatile unsigned char *) (RTC_BASE + 0x004))
+#define RTC_RTCS (*(volatile unsigned char *) (RTC_BASE + 0x008))
+#define RTC_RTCC (*(volatile unsigned char *) (RTC_BASE + 0x008))
+#define RTC_RTCDV (*(volatile unsigned char *) (RTC_BASE + 0x00c))
+#define RTC_RTCCR (*(volatile unsigned char *) (RTC_BASE + 0x010))
+
+/*
+ * RTCCR register values
+ */
+#define RTC_RATE_32 0x00 /* 32 Hz tick */
+#define RTC_RATE_64 0x10 /* 64 Hz tick */
+#define RTC_RATE_128 0x20 /* 128 Hz tick */
+#define RTC_RATE_256 0x30 /* 256 Hz tick */
+#define RTC_EN_ALARM 0x01 /* Enable alarm */
+#define RTC_EN_TIC 0x04 /* Enable counter */
+#define RTC_EN_STWDOG 0x08 /* Enable watchdog */
+
+/*
+ * Handler for RTC timer interrupt
+ */
+static irqreturn_t
+timer_interrupt(int irq, void *dev_id)
+{
+ struct pt_regs *regs = get_irq_regs();
+ do_timer(1);
+#ifndef CONFIG_SMP
+ update_process_times(user_mode(regs));
+#endif
+ do_profile(regs);
+ RTC_RTCC = 0; /* Clear interrupt */
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Set up RTC timer interrupt, and return the current time in seconds.
+ */
+void __init time_init(void)
+{
+ RTC_RTCC = 0; /* Clear interrupt */
+
+ timer_irq.handler = timer_interrupt;
+
+ setup_irq(IRQ_RTC_TICK, &timer_irq);
+
+ RTC_RTCCR = RTC_RATE_128 | RTC_EN_TIC; /* Set rate and enable timer */
+}
+
+#endif