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clocksource/drivers/orion: Read clock rate once 

Rather than reading the clock rate three times, read it once - we are
about to add a fourth usage.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Russell King 2017-03-11 17:42:29 +00:00 committed by Daniel Lezcano
parent 5fc63f9577
commit 0d9298ea37
1 changed files with 7 additions and 4 deletions
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11
drivers/clocksource/time-orion.c
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@ -106,6 +106,7 @@ static struct irqaction orion_clkevt_irq = {
static int __init orion_timer_init(struct device_node *np)
{
unsigned long rate;
struct clk *clk;
int irq, ret;
@ -135,6 +136,8 @@ static int __init orion_timer_init(struct device_node *np)
return -EINVAL;
}
rate = clk_get_rate(clk);
/* setup timer0 as free-running clocksource */
writel(~0, timer_base + TIMER0_VAL);
writel(~0, timer_base + TIMER0_RELOAD);
@ -142,15 +145,15 @@ static int __init orion_timer_init(struct device_node *np)
TIMER0_RELOAD_EN | TIMER0_EN,
TIMER0_RELOAD_EN | TIMER0_EN);
ret = clocksource_mmio_init(timer_base + TIMER0_VAL, "orion_clocksource",
clk_get_rate(clk), 300, 32,
ret = clocksource_mmio_init(timer_base + TIMER0_VAL,
"orion_clocksource", rate, 300, 32,
clocksource_mmio_readl_down);
if (ret) {
pr_err("Failed to initialize mmio timer");
return ret;
}
sched_clock_register(orion_read_sched_clock, 32, clk_get_rate(clk));
sched_clock_register(orion_read_sched_clock, 32, rate);
/* setup timer1 as clockevent timer */
ret = setup_irq(irq, &orion_clkevt_irq);
@ -162,7 +165,7 @@ static int __init orion_timer_init(struct device_node *np)
ticks_per_jiffy = (clk_get_rate(clk) + HZ/2) / HZ;
orion_clkevt.cpumask = cpumask_of(0);
orion_clkevt.irq = irq;
clockevents_config_and_register(&orion_clkevt, clk_get_rate(clk),
clockevents_config_and_register(&orion_clkevt, rate,
ORION_ONESHOT_MIN, ORION_ONESHOT_MAX);
return 0;