ARM: mach-shmobile: CPUIdle support

From: Magnus Damm <[email protected]>

This patch adds a shared SH-Mobile ARM specific CPUIdle implementation supporting WFI only at this point. It serves as a common point for late registration of the arch-specific CPUIdle code, and supports adding extra sleep modes using the callback shmobile_cpuidle_setup() together with shmobile_cpuidle_modes[].

---

 arch/arm/mach-shmobile/Makefile              |    1 
 arch/arm/mach-shmobile/cpuidle.c             |   92 ++++++++++++++++++++++++++
 arch/arm/mach-shmobile/include/mach/common.h |    3 
 3 files changed, 96 insertions(+)

@@ -32,6 +32,7 @@ obj-$(CONFIG_ARCH_SH73A0)	+= entry-gic.o
 
 # PM objects
 obj-$(CONFIG_SUSPEND)		+= suspend.o
+obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
 obj-$(CONFIG_ARCH_SH7372)	+= pm-sh7372.o sleep-sh7372.o
 
 # Board objects

@@ -9,6 +9,9 @@ extern int clk_init(void);
 extern void shmobile_handle_irq_intc(struct pt_regs *);
 extern void shmobile_handle_irq_gic(struct pt_regs *);
 extern struct platform_suspend_ops shmobile_suspend_ops;
+struct cpuidle_device;
+extern void (*shmobile_cpuidle_modes[])(void);
+extern void (*shmobile_cpuidle_setup)(struct cpuidle_device *dev);
 
 extern void sh7367_init_irq(void);
 extern void sh7367_add_early_devices(void);