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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2008-02-24 13:51:38 +0100
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-07-02 11:05:01 +0200
commit02a00cf672a37292c31bbdde191712bfa40a4f1d (patch)
tree5588f7cd600056861fe1313abe7b47b9c051eab6 /arch/avr32/Kconfig
parentaa8e87ca619a3d1944874e85d74fda90607c73b9 (diff)
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 'arch/avr32/Kconfig')
-rw-r--r--arch/avr32/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index e8ee5fa017b..45d63c98601 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -205,6 +205,11 @@ endmenu
menu "Power management options"
+source "kernel/power/Kconfig"
+
+config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+
menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"