ARM: use clockevents_config_and_register() where possible

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.guo@linaro.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Tested-by: Roland Stigge <stigge@antcom.de>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: David Brown <davidb@codeaurora.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Barry Song <baohua.song@csr.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Cc: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Olof Johansson <olof@lixom.net>

2 files changed, 6 insertions, 24 deletions

diff --git a/arch/arm/mach-imx/epit.c b/arch/arm/mach-imx/epit.c
index 04a5961beeac..e02de188ae83 100644
--- a/arch/arm/mach-imx/epit.c
+++ b/arch/arm/mach-imx/epit.c
@@ -178,7 +178,6 @@ static struct irqaction epit_timer_irq = {
 static struct clock_event_device clockevent_epit = {
 	.name		= "epit",
 	.features	= CLOCK_EVT_FEAT_ONESHOT,
-	.shift		= 32,
 	.set_mode	= epit_set_mode,
 	.set_next_event	= epit_set_next_event,
 	.rating		= 200,
@@ -186,18 +185,10 @@ static struct clock_event_device clockevent_epit = {
 
 static int __init epit_clockevent_init(struct clk *timer_clk)
 {
-	unsigned int c = clk_get_rate(timer_clk);
-
-	clockevent_epit.mult = div_sc(c, NSEC_PER_SEC,
-					clockevent_epit.shift);
-	clockevent_epit.max_delta_ns =
-			clockevent_delta2ns(0xfffffffe, &clockevent_epit);
-	clockevent_epit.min_delta_ns =
-			clockevent_delta2ns(0x800, &clockevent_epit);
-
 	clockevent_epit.cpumask = cpumask_of(0);
-
-	clockevents_register_device(&clockevent_epit);
+	clockevents_config_and_register(&clockevent_epit,
+					clk_get_rate(timer_clk),
+					0x800, 0xfffffffe);
 
 	return 0;
 }
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index f017302f6d09..62769df36db1 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -256,7 +256,6 @@ static struct irqaction mxc_timer_irq = {
 static struct clock_event_device clockevent_mxc = {
 	.name		= "mxc_timer1",
 	.features	= CLOCK_EVT_FEAT_ONESHOT,
-	.shift		= 32,
 	.set_mode	= mxc_set_mode,
 	.set_next_event	= mx1_2_set_next_event,
 	.rating		= 200,
@@ -264,21 +263,13 @@ static struct clock_event_device clockevent_mxc = {
 
 static int __init mxc_clockevent_init(struct clk *timer_clk)
 {
-	unsigned int c = clk_get_rate(timer_clk);
-
 	if (timer_is_v2())
 		clockevent_mxc.set_next_event = v2_set_next_event;
 
-	clockevent_mxc.mult = div_sc(c, NSEC_PER_SEC,
-					clockevent_mxc.shift);
-	clockevent_mxc.max_delta_ns =
-			clockevent_delta2ns(0xfffffffe, &clockevent_mxc);
-	clockevent_mxc.min_delta_ns =
-			clockevent_delta2ns(0xff, &clockevent_mxc);
-
 	clockevent_mxc.cpumask = cpumask_of(0);
-
-	clockevents_register_device(&clockevent_mxc);
+	clockevents_config_and_register(&clockevent_mxc,
+					clk_get_rate(timer_clk),
+					0xff, 0xfffffffe);
 
 	return 0;
 }