[PATCH 3/3] ARM: twd_smp: add clock api support
Rob Herring
robherring2 at gmail.com
Thu Sep 30 18:49:12 EDT 2010
From: Rob Herring <rob.herring at smooth-stone.com>
The private timer freq is currently dynamically detected
using jiffies count to determine the rate. This method adds
a delay to boot-up, so use the clock api instead to get the
clock rate.
Signed-off-by: Rob Herring <rob.herring at smooth-stone.com>
---
arch/arm/include/asm/smp_twd.h | 2 ++
arch/arm/kernel/smp_twd.c | 7 +++++++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/smp_twd.h b/arch/arm/include/asm/smp_twd.h
index 634f357..bafad52 100644
--- a/arch/arm/include/asm/smp_twd.h
+++ b/arch/arm/include/asm/smp_twd.h
@@ -19,11 +19,13 @@
#define TWD_TIMER_CONTROL_IT_ENABLE (1 << 2)
struct clock_event_device;
+struct clk;
extern void __iomem *twd_base;
void twd_timer_stop(void);
int twd_timer_ack(void);
void twd_timer_setup(struct clock_event_device *);
+void twd_timer_init(void __iomem *base, struct clk *clk);
#endif
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 35882fb..1a3c959 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -17,6 +17,7 @@
#include <linux/clockchips.h>
#include <linux/irq.h>
#include <linux/io.h>
+#include <linux/clk.h>
#include <asm/smp_twd.h>
#include <asm/hardware/gic.h>
@@ -151,6 +152,12 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
clockevents_register_device(clk);
}
+void __init twd_timer_init(void __iomem *base, struct clk *clk)
+{
+ twd_base = base;
+ twd_timer_rate = clk_get_rate(clk);
+}
+
#ifdef CONFIG_HOTPLUG_CPU
/*
* take a local timer down
--
1.7.0.4
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