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authorNicolas Pitre <nicolas.pitre@linaro.org>2011-08-02 12:52:48 -0400
committerNicolas Pitre <nico@fluxnic.net>2012-01-20 18:55:11 -0500
commit1b7f72fc395d3d2b498fee5ecfb9e46497f55cdd (patch)
tree8fefa3bde9652f8acb8bda177f3b38149d53a0be /arch/arm/mach-ebsa110
parent71e256c54d67f55536bae184bb579c682714a95a (diff)
downloadop-kernel-dev-1b7f72fc395d3d2b498fee5ecfb9e46497f55cdd.zip
op-kernel-dev-1b7f72fc395d3d2b498fee5ecfb9e46497f55cdd.tar.gz
ARM: mach-ebsa110: move special idle code out of line
... and hook it to arm_pm_idle. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch/arm/mach-ebsa110')
-rw-r--r--arch/arm/mach-ebsa110/core.c25
-rw-r--r--arch/arm/mach-ebsa110/include/mach/system.h21
2 files changed, 26 insertions, 20 deletions
diff --git a/arch/arm/mach-ebsa110/core.c b/arch/arm/mach-ebsa110/core.c
index 294aad0..804c912 100644
--- a/arch/arm/mach-ebsa110/core.c
+++ b/arch/arm/mach-ebsa110/core.c
@@ -271,8 +271,33 @@ static struct platform_device *ebsa110_devices[] = {
&am79c961_device,
};
+/*
+ * EBSA110 idling methodology:
+ *
+ * We can not execute the "wait for interrupt" instruction since that
+ * will stop our MCLK signal (which provides the clock for the glue
+ * logic, and therefore the timer interrupt).
+ *
+ * Instead, we spin, polling the IRQ_STAT register for the occurrence
+ * of any interrupt with core clock down to the memory clock.
+ */
+static void ebsa110_idle(void)
+{
+ const char *irq_stat = (char *)0xff000000;
+
+ /* disable clock switching */
+ asm volatile ("mcr p15, 0, ip, c15, c2, 2" : : : "cc");
+
+ /* wait for an interrupt to occur */
+ while (!*irq_stat);
+
+ /* enable clock switching */
+ asm volatile ("mcr p15, 0, ip, c15, c1, 2" : : : "cc");
+}
+
static int __init ebsa110_init(void)
{
+ arm_pm_idle = ebsa110_idle;
return platform_add_devices(ebsa110_devices, ARRAY_SIZE(ebsa110_devices));
}
diff --git a/arch/arm/mach-ebsa110/include/mach/system.h b/arch/arm/mach-ebsa110/include/mach/system.h
index 2e4af65..b460169 100644
--- a/arch/arm/mach-ebsa110/include/mach/system.h
+++ b/arch/arm/mach-ebsa110/include/mach/system.h
@@ -10,28 +10,9 @@
#ifndef __ASM_ARCH_SYSTEM_H
#define __ASM_ARCH_SYSTEM_H
-/*
- * EBSA110 idling methodology:
- *
- * We can not execute the "wait for interrupt" instruction since that
- * will stop our MCLK signal (which provides the clock for the glue
- * logic, and therefore the timer interrupt).
- *
- * Instead, we spin, polling the IRQ_STAT register for the occurrence
- * of any interrupt with core clock down to the memory clock.
- */
static inline void arch_idle(void)
{
- const char *irq_stat = (char *)0xff000000;
-
- /* disable clock switching */
- asm volatile ("mcr p15, 0, ip, c15, c2, 2" : : : "cc");
-
- /* wait for an interrupt to occur */
- while (!*irq_stat);
-
- /* enable clock switching */
- asm volatile ("mcr p15, 0, ip, c15, c1, 2" : : : "cc");
+ cpu_do_idle();
}
#endif
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