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authorRussell King <rmk+kernel@armlinux.org.uk>2017-03-11 17:42:29 +0000
committerDaniel Lezcano <daniel.lezcano@linaro.org>2017-04-07 16:23:03 +0200
commit0d9298ea37b5f590f3d10ccc2d8d34d26af3fa84 (patch)
tree3f6c890b6d0fde292f02fa58caf9fde538f2b184
parent5fc63f9577322d11019b6d357f73f5ce9031f263 (diff)
downloadlinux-0d9298ea37b5f590f3d10ccc2d8d34d26af3fa84.tar.gz
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>
-rw-r--r--drivers/clocksource/time-orion.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c
index a28f496e97cf..c4818a5dc8e5 100644
--- a/drivers/clocksource/time-orion.c
+++ b/drivers/clocksource/time-orion.c
@@ -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;