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-rw-r--r--arch/arm/mach-rpc/include/mach/timex.h17
-rw-r--r--arch/arm/mach-rpc/time.c15
2 files changed, 9 insertions, 23 deletions
diff --git a/arch/arm/mach-rpc/include/mach/timex.h b/arch/arm/mach-rpc/include/mach/timex.h
deleted file mode 100644
index dd75e7387bbe..000000000000
--- a/arch/arm/mach-rpc/include/mach/timex.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * arch/arm/mach-rpc/include/mach/timex.h
- *
- * Copyright (C) 1997, 1998 Russell King
- *
- * 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.
- *
- * RiscPC architecture timex specifications
- */
-
-/*
- * On the RiscPC, the clock ticks at 2MHz.
- */
-#define CLOCK_TICK_RATE 2000000
-
diff --git a/arch/arm/mach-rpc/time.c b/arch/arm/mach-rpc/time.c
index 9a5158861ca9..2689771c1d38 100644
--- a/arch/arm/mach-rpc/time.c
+++ b/arch/arm/mach-rpc/time.c
@@ -24,6 +24,9 @@
#include <asm/mach/time.h>
+#define RPC_CLOCK_FREQ 2000000
+#define RPC_LATCH DIV_ROUND_CLOSEST(RPC_CLOCK_FREQ, HZ)
+
static u32 ioc_timer_gettimeoffset(void)
{
unsigned int count1, count2, status;
@@ -46,23 +49,23 @@ static u32 ioc_timer_gettimeoffset(void)
* and count2.
*/
if (status & (1 << 5))
- offset -= LATCH;
+ offset -= RPC_LATCH;
} else if (count2 > count1) {
/*
* We have just had another interrupt between reading
* count1 and count2.
*/
- offset -= LATCH;
+ offset -= RPC_LATCH;
}
- offset = (LATCH - offset) * (tick_nsec / 1000);
- return ((offset + LATCH/2) / LATCH) * 1000;
+ offset = (RPC_LATCH - offset) * (tick_nsec / 1000);
+ return DIV_ROUND_CLOSEST(offset, RPC_LATCH) * 1000;
}
void __init ioctime_init(void)
{
- ioc_writeb(LATCH & 255, IOC_T0LTCHL);
- ioc_writeb(LATCH >> 8, IOC_T0LTCHH);
+ ioc_writeb(RPC_LATCH & 255, IOC_T0LTCHL);
+ ioc_writeb(RPC_LATCH >> 8, IOC_T0LTCHH);
ioc_writeb(0, IOC_T0GO);
}