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Diffstat (limited to 'arch/arm/mach-bcmring/timer.c')
-rw-r--r--arch/arm/mach-bcmring/timer.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/timer.c b/arch/arm/mach-bcmring/timer.c
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index 000000000000..2d415d2a8e68
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+++ b/arch/arm/mach-bcmring/timer.c
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+/*****************************************************************************
+* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <csp/tmrHw.h>
+
+#include <mach/timer.h>
+/* The core.c file initializes timers 1 and 3 as a linux clocksource. */
+/* The real time clock should probably be the real linux clocksource. */
+/* In the meantime, this file should agree with core.c as to the */
+/* profiling timer. If the clocksource is moved to rtc later, then */
+/* we can init the profiling timer here instead. */
+
+/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */
+/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */
+/* affect synchronization with scheduling and APM timing. */
+
+#define PROF_TIMER 1
+
+timer_tick_rate_t timer_get_tick_rate(void)
+{
+ return tmrHw_getCountRate(PROF_TIMER);
+}
+
+timer_tick_count_t timer_get_tick_count(void)
+{
+ return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */
+}
+
+timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks)
+{
+ static int tickRateMsec;
+
+ if (tickRateMsec == 0) {
+ tickRateMsec = timer_get_tick_rate() / 1000;
+ }
+
+ return ticks / tickRateMsec;
+}
+
+timer_msec_t timer_get_msec(void)
+{
+ return timer_ticks_to_msec(timer_get_tick_count());
+}
+
+EXPORT_SYMBOL(timer_get_tick_count);
+EXPORT_SYMBOL(timer_ticks_to_msec);
+EXPORT_SYMBOL(timer_get_tick_rate);
+EXPORT_SYMBOL(timer_get_msec);