forked from Minki/linux
Blackfin arch: cleanup the time.c code
- make the code a bit more readable - kill of warnings/ifdef mess a bit Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger
Bryan Wu
parent
33c8691f45
commit
1b047d8cc5
@ -1,32 +1,11 @@
|
||||
/*
|
||||
* File: arch/blackfin/kernel/time.c
|
||||
* Based on: none - original work
|
||||
* Author:
|
||||
* arch/blackfin/kernel/time.c
|
||||
*
|
||||
* Created:
|
||||
* Description: This file contains the bfin-specific time handling details.
|
||||
* This file contains the Blackfin-specific time handling details.
|
||||
* Most of the stuff is located in the machine specific files.
|
||||
* FIXME: (This file is subject for removal)
|
||||
*
|
||||
* Modified:
|
||||
* Copyright 2004-2008 Analog Devices Inc.
|
||||
*
|
||||
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, see the file COPYING, or write
|
||||
* to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
* Licensed under the GPL-2 or later.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
@ -43,11 +22,8 @@
|
||||
/* This is an NTP setting */
|
||||
#define TICK_SIZE (tick_nsec / 1000)
|
||||
|
||||
static void time_sched_init(irq_handler_t timer_routine);
|
||||
static unsigned long gettimeoffset(void);
|
||||
|
||||
static struct irqaction bfin_timer_irq = {
|
||||
.name = "BFIN Timer Tick",
|
||||
.name = "Blackfin Timer Tick",
|
||||
#ifdef CONFIG_IRQ_PER_CPU
|
||||
.flags = IRQF_DISABLED | IRQF_PERCPU,
|
||||
#else
|
||||
@ -55,29 +31,6 @@ static struct irqaction bfin_timer_irq = {
|
||||
#endif
|
||||
};
|
||||
|
||||
void setup_core_timer(void)
|
||||
{
|
||||
u32 tcount;
|
||||
|
||||
/* power up the timer, but don't enable it just yet */
|
||||
bfin_write_TCNTL(1);
|
||||
CSYNC();
|
||||
|
||||
/*
|
||||
* the TSCALE prescaler counter.
|
||||
*/
|
||||
bfin_write_TSCALE((TIME_SCALE - 1));
|
||||
|
||||
tcount = ((get_cclk() / (HZ * TIME_SCALE)) - 1);
|
||||
bfin_write_TPERIOD(tcount);
|
||||
bfin_write_TCOUNT(tcount);
|
||||
|
||||
/* now enable the timer */
|
||||
CSYNC();
|
||||
|
||||
bfin_write_TCNTL(7);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_TICK_SOURCE_SYSTMR0
|
||||
void setup_system_timer0(void)
|
||||
{
|
||||
@ -95,6 +48,27 @@ void setup_system_timer0(void)
|
||||
SSYNC();
|
||||
enable_gptimers(TIMER0bit);
|
||||
}
|
||||
#else
|
||||
void setup_core_timer(void)
|
||||
{
|
||||
u32 tcount;
|
||||
|
||||
/* power up the timer, but don't enable it just yet */
|
||||
bfin_write_TCNTL(1);
|
||||
CSYNC();
|
||||
|
||||
/* the TSCALE prescaler counter */
|
||||
bfin_write_TSCALE(TIME_SCALE - 1);
|
||||
|
||||
tcount = ((get_cclk() / (HZ * TIME_SCALE)) - 1);
|
||||
bfin_write_TPERIOD(tcount);
|
||||
bfin_write_TCOUNT(tcount);
|
||||
|
||||
/* now enable the timer */
|
||||
CSYNC();
|
||||
|
||||
bfin_write_TCNTL(7);
|
||||
}
|
||||
#endif
|
||||
|
||||
static void
|
||||
@ -102,13 +76,11 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *))
|
||||
{
|
||||
#ifdef CONFIG_TICK_SOURCE_SYSTMR0
|
||||
setup_system_timer0();
|
||||
#else
|
||||
setup_core_timer();
|
||||
#endif
|
||||
bfin_timer_irq.handler = (irq_handler_t)timer_routine;
|
||||
#ifdef CONFIG_TICK_SOURCE_SYSTMR0
|
||||
bfin_timer_irq.handler = timer_routine;
|
||||
setup_irq(IRQ_TIMER0, &bfin_timer_irq);
|
||||
#else
|
||||
setup_core_timer();
|
||||
bfin_timer_irq.handler = timer_routine;
|
||||
setup_irq(IRQ_CORETMR, &bfin_timer_irq);
|
||||
#endif
|
||||
}
|
||||
@ -116,6 +88,7 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *))
|
||||
/*
|
||||
* Should return useconds since last timer tick
|
||||
*/
|
||||
#ifndef CONFIG_GENERIC_TIME
|
||||
static unsigned long gettimeoffset(void)
|
||||
{
|
||||
unsigned long offset;
|
||||
@ -140,6 +113,7 @@ static unsigned long gettimeoffset(void)
|
||||
#endif
|
||||
return offset;
|
||||
}
|
||||
#endif
|
||||
|
||||
static inline int set_rtc_mmss(unsigned long nowtime)
|
||||
{
|
||||
@ -151,9 +125,8 @@ static inline int set_rtc_mmss(unsigned long nowtime)
|
||||
* as well as call the "do_timer()" routine every clocktick
|
||||
*/
|
||||
#ifdef CONFIG_CORE_TIMER_IRQ_L1
|
||||
irqreturn_t timer_interrupt(int irq, void *dummy)__attribute__((l1_text));
|
||||
__attribute__((l1_text))
|
||||
#endif
|
||||
|
||||
irqreturn_t timer_interrupt(int irq, void *dummy)
|
||||
{
|
||||
/* last time the cmos clock got updated */
|
||||
@ -165,13 +138,11 @@ irqreturn_t timer_interrupt(int irq, void *dummy)
|
||||
#endif
|
||||
do_timer(1);
|
||||
|
||||
|
||||
/*
|
||||
* If we have an externally synchronized Linux clock, then update
|
||||
* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
|
||||
* called as close as possible to 500 ms before the new second starts.
|
||||
*/
|
||||
|
||||
if (ntp_synced() &&
|
||||
xtime.tv_sec > last_rtc_update + 660 &&
|
||||
(xtime.tv_nsec / NSEC_PER_USEC) >=
|
||||
|
||||
Loading…
Reference in New Issue
Block a user