1 files changed, 72 insertions, 0 deletions

diff --git a/include/asm-arm/arch-l7200/time.h b/include/asm-arm/arch-l7200/time.h
new file mode 100644
index 000000000000..7b98b533e63a
--- /dev/null
+++ b/include/asm-arm/arch-l7200/time.h
@@ -0,0 +1,72 @@
+/*
+ * linux/include/asm-arm/arch-l7200/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 <asm/arch/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)
+{
+        do_timer(regs);
+#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