The clockevent core is able to figure out the best mult and shift,
calculate min_delta_ns and max_delta_ns, with the necessary info passed
into clockevents_config_and_register(). Use this combined configure
and register function where possible to make the codes less error prone
and gain some positive diff stat.
Signed-off-by: Shawn Guo <shawn....@linaro.org>
Cc: Andres Salomon <dilin...@queued.net>
Cc: Maxime Ripard <maxime.rip...@free-electrons.com>
Cc: Nicolas Ferre <nicolas.fe...@atmel.com>
---
drivers/clocksource/cs5535-clockevt.c | 11 ++---------
drivers/clocksource/sunxi_timer.c | 11 ++---------
drivers/clocksource/tcb_clksrc.c | 7 +------
3 files changed, 5 insertions(+), 24 deletions(-)
diff --git a/drivers/clocksource/cs5535-clockevt.c
b/drivers/clocksource/cs5535-clockevt.c
index d927938..ea21048 100644
--- a/drivers/clocksource/cs5535-clockevt.c
+++ b/drivers/clocksource/cs5535-clockevt.c
@@ -100,7 +100,6 @@ static struct clock_event_device cs5535_clockevent = {
.set_mode = mfgpt_set_mode,
.set_next_event = mfgpt_next_event,
.rating = 250,
- .shift = 32
};
static irqreturn_t mfgpt_tick(int irq, void *dev_id)
@@ -169,17 +168,11 @@ static int __init cs5535_mfgpt_init(void)
cs5535_mfgpt_write(cs5535_event_clock, MFGPT_REG_SETUP, val);
/* Set up the clock event */
- cs5535_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC,
- cs5535_clockevent.shift);
- cs5535_clockevent.min_delta_ns = clockevent_delta2ns(0xF,
- &cs5535_clockevent);
- cs5535_clockevent.max_delta_ns = clockevent_delta2ns(0xFFFE,
- &cs5535_clockevent);
-
printk(KERN_INFO DRV_NAME
": Registering MFGPT timer as a clock event, using IRQ %d\n",
timer_irq);
- clockevents_register_device(&cs5535_clockevent);
+ clockevents_config_and_register(&cs5535_clockevent, MFGPT_HZ,
+ 0xF, 0xFFFE);
return 0;
diff --git a/drivers/clocksource/sunxi_timer.c
b/drivers/clocksource/sunxi_timer.c
index 3c46434..5026b78 100644
--- a/drivers/clocksource/sunxi_timer.c
+++ b/drivers/clocksource/sunxi_timer.c
@@ -74,7 +74,6 @@ static int sunxi_clkevt_next_event(unsigned long evt,
static struct clock_event_device sunxi_clockevent = {
.name = "sunxi_tick",
- .shift = 32,
.rating = 300,
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_mode = sunxi_clkevt_mode,
@@ -153,16 +152,10 @@ static void __init sunxi_timer_init(void)
val = readl(timer_base + TIMER_CTL_REG);
writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG);
- sunxi_clockevent.mult = div_sc(rate / TIMER_SCAL,
- NSEC_PER_SEC,
- sunxi_clockevent.shift);
- sunxi_clockevent.max_delta_ns = clockevent_delta2ns(0xff,
- &sunxi_clockevent);
- sunxi_clockevent.min_delta_ns = clockevent_delta2ns(0x1,
- &sunxi_clockevent);
sunxi_clockevent.cpumask = cpumask_of(0);
- clockevents_register_device(&sunxi_clockevent);
+ clockevents_config_and_register(&sunxi_clockevent, rate / TIMER_SCAL,
+ 0x1, 0xff);
}
struct sys_timer sunxi_timer = {
diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
index 32cb929..8a61872 100644
--- a/drivers/clocksource/tcb_clksrc.c
+++ b/drivers/clocksource/tcb_clksrc.c
@@ -157,7 +157,6 @@ static struct tc_clkevt_device clkevt = {
.name = "tc_clkevt",
.features = CLOCK_EVT_FEAT_PERIODIC
| CLOCK_EVT_FEAT_ONESHOT,
- .shift = 32,
/* Should be lower than at91rm9200's system timer */
.rating = 125,
.set_next_event = tc_next_event,
@@ -196,13 +195,9 @@ static void __init setup_clkevents(struct atmel_tc *tc,
int clk32k_divisor_idx)
timer_clock = clk32k_divisor_idx;
- clkevt.clkevt.mult = div_sc(32768, NSEC_PER_SEC, clkevt.clkevt.shift);
- clkevt.clkevt.max_delta_ns
- = clockevent_delta2ns(0xffff, &clkevt.clkevt);
- clkevt.clkevt.min_delta_ns = clockevent_delta2ns(1, &clkevt.clkevt) + 1;
clkevt.clkevt.cpumask = cpumask_of(0);
- clockevents_register_device(&clkevt.clkevt);
+ clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff);
setup_irq(irq, &tc_irqaction);
}
--
1.7.9.5
--
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