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[AVR32] Put cpu in sleep 0 when idle.

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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>
This commit is contained in:
Hans-Christian Egtvedt
2007-02-26 13:50:43 +01:00
committed by Haavard Skinnemoen
parent 7760989e5e
commit 19b7ce8bad
3 changed files with 42 additions and 7 deletions
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5
arch/avr32/kernel/process.c
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@@ -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();