diff options
author | Leo Chen <leochen@broadcom.com> | 2009-08-07 19:01:47 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-08-15 15:01:41 (GMT) |
commit | 34559125742645843bc7639900c7b4737ec12b72 (patch) | |
tree | 671f6a7fcd53e82bb29d620edf5739f4e8c5d0f7 /arch/arm/mach-bcmring/timer.c | |
parent | 859277f7dbf8b48016d55ea2171d04eed074d858 (diff) | |
download | linux-fsl-qoriq-34559125742645843bc7639900c7b4737ec12b72.tar.xz |
ARM: 5649/1: bcmring: add bcmring timer function
bcmring timer helper function, hardware register headers
Signed-off-by: Leo Chen <leochen@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-bcmring/timer.c')
-rw-r--r-- | arch/arm/mach-bcmring/timer.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/timer.c b/arch/arm/mach-bcmring/timer.c new file mode 100644 index 0000000..2d415d2 --- /dev/null +++ b/arch/arm/mach-bcmring/timer.c @@ -0,0 +1,62 @@ +/***************************************************************************** +* 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); |