ARM: OMAP: Enable dynamic tick timer for OMAP

Enables dynamic tick timer for OMAP.

Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index 3646c2ce67fb0ffe052cac6da554545f75f847ee..7694dc1aa0c58f045f836bcea93cff795b712a28 100644 (file)
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -93,6 +93,31 @@ config OMAP_32K_TIMER_HZ
          Kernel internal timer frequency should be a divisor of 32768,
          such as 64 or 128.
 
+config NO_IDLE_HZ
+       bool "Dynamic Tick Timer"
+       depends on OMAP_32K_TIMER
+       help
+         Select this option if you want to disable continuous timer ticks
+         and have them programmed one at a time from the idle loop. This
+         option saves power as the system does not need to exit idle state
+         because of a timer interrupt. If you have this option selected,
+         you still need to enable dynamic tick using the sysfs interface.
+         By default dynamic tick is disabled during the boot, and can be
+         manually enabled with:
+
+         echo 1 > /sys/devices/platform/timer0/dyn_tick
+
+         If you want dynamic tick automatically enabled during boot, select
+         also NO_IDLE_HZ_ENABLED below.
+
+config NO_IDLE_HZ_ENABLED
+       bool "Enable Dynamic Tick Timer by default"
+       depends on NO_IDLE_HZ
+       default n
+       help
+         Select this option if you want dynamic tick turned on by default
+         at startup.
+
 choice
        prompt "Low-level debug console UART"
        depends on ARCH_OMAP