hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ARM: ep93xx: switch clockevent to timer 3 

If we switch clock events to timer 3 we will have more bits to
use and can sleep longer when using NO_HZ.

Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-06-15 14:42:25 +02:00
parent d118d977c1
commit d5878e6e22
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
arch/arm/mach-ep93xx/timer-ep93xx.c
View File

@ -77,12 +77,12 @@ static int ep93xx_clkevt_set_next_event(unsigned long next,
EP93XX_TIMER123_CONTROL_CLKSEL;
/* Clear timer */
writel(tmode, EP93XX_TIMER1_CONTROL);
writel(tmode, EP93XX_TIMER3_CONTROL);
/* Set next event */
writel(next, EP93XX_TIMER1_LOAD);
writel(next, EP93XX_TIMER3_LOAD);
writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
EP93XX_TIMER1_CONTROL);
EP93XX_TIMER3_CONTROL);
return 0;
}
@ -91,7 +91,7 @@ static void ep93xx_clkevt_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
/* Disable timer */
writel(0, EP93XX_TIMER1_CONTROL);
writel(0, EP93XX_TIMER3_CONTROL);
}
static struct clock_event_device ep93xx_clockevent = {
@ -107,7 +107,7 @@ static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
struct clock_event_device *evt = dev_id;
/* Writing any value clears the timer interrupt */
writel(1, EP93XX_TIMER1_CLEAR);
writel(1, EP93XX_TIMER3_CLEAR);
evt->event_handler(evt);
@ -132,11 +132,10 @@ void __init ep93xx_timer_init(void)
sched_clock_register(ep93xx_read_sched_clock, 40,
EP93XX_TIMER4_RATE);
/* Set up clockevent on timer 1 */
setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
// FIXME: timer one is 16 bits 1-ffff use timer 3 1-ffffffff */
/* Set up clockevent on timer 3 */
setup_irq(IRQ_EP93XX_TIMER3, &ep93xx_timer_irq);
clockevents_config_and_register(&ep93xx_clockevent,
EP93XX_TIMER123_RATE,
1,
0xffffU);
0xffffffffU);
}