[RFC/PATCH,1/2] OMAP: PM: add "early" idle notifications

Commit Message

Kevin Hilman Oct. 20, 2010, 11:38 p.m. UTC

None

Patch

diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 343e8d6..e927419 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -54,6 +54,33 @@  void omap_idle_notifier_end(void)
 	atomic_notifier_call_chain(&idle_notifier, OMAP_IDLE_END, NULL);
 }
 
+/* idle notifications early in the idle path (interrupts enabled) */
+static BLOCKING_NOTIFIER_HEAD(early_idle_notifier);
+
+void omap_early_idle_notifier_register(struct notifier_block *n)
+{
+	blocking_notifier_chain_register(&early_idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(omap_early_idle_notifier_register);
+
+void omap_early_idle_notifier_unregister(struct notifier_block *n)
+{
+	blocking_notifier_chain_unregister(&early_idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(omap_early_idle_notifier_unregister);
+
+void omap_early_idle_notifier_start(void)
+{
+	blocking_notifier_call_chain(&early_idle_notifier,
+				     OMAP_IDLE_START, NULL);
+}
+
+void omap_early_idle_notifier_end(void)
+{
+	blocking_notifier_call_chain(&early_idle_notifier,
+				     OMAP_IDLE_END, NULL);
+}
+
 struct device *omap2_get_mpuss_device(void)
 {
 	WARN_ON_ONCE(!mpu_dev);
diff --git a/arch/arm/plat-omap/include/plat/common.h b/arch/arm/plat-omap/include/plat/common.h
index 1ca32cf..1bd57f1 100644
--- a/arch/arm/plat-omap/include/plat/common.h
+++ b/arch/arm/plat-omap/include/plat/common.h
@@ -106,4 +106,10 @@  extern void omap_idle_notifier_unregister(struct notifier_block *n);
 extern void omap_idle_notifier_start(void);
 extern void omap_idle_notifier_end(void);
 
+/* idle notifications early in the idle path (interrupts enabled) */
+extern void omap_early_idle_notifier_register(struct notifier_block *n);
+extern void omap_early_idle_notifier_unregister(struct notifier_block *n);
+extern void omap_early_idle_notifier_start(void);
+extern void omap_early_idle_notifier_end(void);
+
 #endif /* __ARCH_ARM_MACH_OMAP_COMMON_H */