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-smd.c b/arch/arm/mach-msm/rpm-smd.c
index 697d504..0faafc8 100644
--- a/arch/arm/mach-msm/rpm-smd.c
+++ b/arch/arm/mach-msm/rpm-smd.c
@@ -886,6 +886,27 @@
return rc;
}
EXPORT_SYMBOL(msm_rpm_send_message_noirq);
+
+/**
+ * During power collapse, the rpm driver disables the SMD interrupts to make
+ * sure that the interrupt doesn't wakes us from sleep.
+ */
+int msm_rpm_enter_sleep(void)
+{
+ return smd_mask_receive_interrupt(msm_rpm_data.ch_info, true);
+}
+EXPORT_SYMBOL(msm_rpm_enter_sleep);
+
+/**
+ * When the system resumes from power collapse, the SMD interrupt disabled by
+ * enter function has to reenabled to continue processing SMD message.
+ */
+void msm_rpm_exit_sleep(void)
+{
+ smd_mask_receive_interrupt(msm_rpm_data.ch_info, false);
+}
+EXPORT_SYMBOL(msm_rpm_exit_sleep);
+
static bool msm_rpm_set_standalone(void)
{
if (machine_is_msm8974()) {