msm: rpm-smd: call SMD API to mask/unmask SMD interrupt.
When the system goes to sleep, the power management code sends a sleep
set to RPM. The code executes with interrupts disabled so the power
management code polls for ack message from RPM. Since the SMD interrupt
is in a triggered state and irq handler hasn't had a chance to run, the
pending interrupt prevent the Core from entering a low power mode.
To prevent interrupt from waking the system up, disable/enable the RPM to
SMD interrupt while entering/exiting sleep mode, by calling into the SMD
API.
Change-Id: I38faa18e6b1d7f4cc92d72c3da4ac8ca29275444
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
diff --git a/arch/arm/mach-msm/rpm-notifier.h b/arch/arm/mach-msm/rpm-notifier.h
index df8d9b3..33086c6 100644
--- a/arch/arm/mach-msm/rpm-notifier.h
+++ b/arch/arm/mach-msm/rpm-notifier.h
@@ -20,8 +20,31 @@
uint32_t size;
uint8_t *value;
};
-
+/**
+ * msm_rpm_register_notifier - Register for sleep set notifications
+ *
+ * @nb - notifier block to register
+ *
+ * return 0 on success, errno on failure.
+ */
int msm_rpm_register_notifier(struct notifier_block *nb);
+
+/**
+ * msm_rpm_unregister_notifier - Unregister previously registered notifications
+ *
+ * @nb - notifier block to unregister
+ *
+ * return 0 on success, errno on failure.
+ */
int msm_rpm_unregister_notifier(struct notifier_block *nb);
+/**
+ * msm_rpm_enter_sleep - Notify RPM driver to prepare for entering sleep
+ */
+int msm_rpm_enter_sleep(void);
+
+/**
+ * msm_rpm_exit_sleep - Notify RPM driver about resuming from power collapse
+ */
+void msm_rpm_exit_sleep(void);
#endif /*__ARCH_ARM_MACH_MSM_RPM_NOTIF_H */