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authorHans-Christian Egtvedt <hcegtvedt@atmel.com>2007-02-26 13:50:43 +0100
committerHaavard Skinnemoen <hskinnemoen@atmel.com>2007-04-27 13:44:12 +0200
commit19b7ce8bad718a2850ea19aeb7383f1728596c24 (patch)
tree1fef17c37eaf90231a497b92dd49565e56986b6c /arch/avr32/kernel/process.c
parent7760989e5e2900e484e9115e6e690c6ce0b0221c (diff)
[AVR32] Put cpu in sleep 0 when idle.
This patch puts the CPU in sleep 0 when doing nothing, idle. This will turn of the CPU clock and thus save power. The CPU is waken again when an interrupt occurs. Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/kernel/process.c')
-rw-r--r--arch/avr32/kernel/process.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index 0b4325946a4..4f8d2d47474 100644
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c
@@ -19,6 +19,8 @@
void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
+extern void cpu_idle_sleep(void);
+
/*
* This file handles the architecture-dependent parts of process handling..
*/
@@ -27,9 +29,8 @@ void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
- /* TODO: Enter sleep mode */
while (!need_resched())
- cpu_relax();
+ cpu_idle_sleep();
preempt_enable_no_resched();
schedule();
preempt_disable();