diff options
| author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2008-02-24 13:51:38 +0100 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-07-02 11:05:01 +0200 |
| commit | 02a00cf672a37292c31bbdde191712bfa40a4f1d (patch) | |
| tree | 5588f7cd600056861fe1313abe7b47b9c051eab6 /include/asm-avr32 | |
| parent | aa8e87ca619a3d1944874e85d74fda90607c73b9 (diff) | |
| download | lwn-02a00cf672a37292c31bbdde191712bfa40a4f1d.tar.gz lwn-02a00cf672a37292c31bbdde191712bfa40a4f1d.zip | |
avr32: Power Management support ("standby" and "mem" modes)
Implement Standby support. In this mode, we'll suspend all drivers,
put the SDRAM in self-refresh mode and switch off the HSB bus
("frozen" mode.)
Implement Suspend-to-mem support. In this mode, we suspend all
drivers, put the SDRAM into self-refresh mode and switch off all
internal clocks except the 32 kHz oscillator ("stop" mode.)
The lowest-level suspend code runs from a small portion of SRAM
allocated at startup time. This gets rid of a small potential race
with the SDRAM where we might try to enter self-refresh mode in the
middle of an icache burst. We also relocate all interrupt and
exception handlers to SRAM during the small window when we enter and
exit the low-power modes.
We don't need to do any special tricks to start and stop the PLL. The
main clock is automatically gated by hardware until the PLL is stable.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32')
| -rw-r--r-- | include/asm-avr32/arch-at32ap/pm.h | 3 | ||||
| -rw-r--r-- | include/asm-avr32/thread_info.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-avr32/arch-at32ap/pm.h b/include/asm-avr32/arch-at32ap/pm.h index 356e43064903..979b355b77b6 100644 --- a/include/asm-avr32/arch-at32ap/pm.h +++ b/include/asm-avr32/arch-at32ap/pm.h @@ -19,6 +19,7 @@ #ifndef __ASSEMBLY__ extern void cpu_enter_idle(void); +extern void cpu_enter_standby(unsigned long sdramc_base); extern bool disable_idle_sleep; @@ -43,6 +44,8 @@ static inline void cpu_idle_sleep(void) else cpu_enter_idle(); } + +void intc_set_suspend_handler(unsigned long offset); #endif #endif /* __ASM_AVR32_ARCH_PM_H */ diff --git a/include/asm-avr32/thread_info.h b/include/asm-avr32/thread_info.h index 07049f6c0d41..df68631b7b27 100644 --- a/include/asm-avr32/thread_info.h +++ b/include/asm-avr32/thread_info.h @@ -88,6 +88,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_MEMDIE 6 #define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */ #define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */ +#define TIF_FREEZE 29 #define TIF_DEBUG 30 /* debugging enabled */ #define TIF_USERSPACE 31 /* true if FS sets userspace */ |