diff options
| author | Greg Ungerer <gerg@snapgear.com> | 2010-09-21 20:39:40 +1000 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2010-10-07 19:56:54 +0200 |
| commit | cb809b1a5ebffca8cf0314b788919989e8e4ab5f (patch) | |
| tree | fec437f53dbc5dd30b7289415ce731ec5db1b5f2 /arch/arm/mach-at91/include/mach/system.h | |
| parent | a6e016f19d393fbe4e040bee8155b03b840fa689 (diff) | |
AT91: fix use of clock disable on idle for AT91x40 devices
The simpler AT91x40 processors do not have the same power management
controller as the new AT91 devices. They do have a simpler power
controller module that we can use to disable the CPU clock at idle
time. Add code to support that.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/mach-at91/include/mach/system.h')
| -rw-r--r-- | arch/arm/mach-at91/include/mach/system.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/system.h b/arch/arm/mach-at91/include/mach/system.h index c80e090b367..bfbb612265d 100644 --- a/arch/arm/mach-at91/include/mach/system.h +++ b/arch/arm/mach-at91/include/mach/system.h @@ -33,7 +33,11 @@ static inline void arch_idle(void) * Disable the processor clock. The processor will be automatically * re-enabled by an interrupt or by a reset. */ +#ifdef AT91_PS + at91_sys_write(AT91_PS_CR, AT91_PS_CR_CPU); +#else at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK); +#endif #else /* * Set the processor (CP15) into 'Wait for Interrupt' mode. |