LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* [PATCH V2 1/1] soc: qcom: smp2p: Add wakeup capability to SMP2P IRQ
@ 2021-08-16 10:05 Deepak Kumar Singh
  2021-08-16 18:31 ` Matthias Kaehlcke
  2021-08-16 20:23 ` Stephen Boyd
  0 siblings, 2 replies; 5+ messages in thread
From: Deepak Kumar Singh @ 2021-08-16 10:05 UTC (permalink / raw)
  To: bjorn.andersson, swboyd, clew, sibis
  Cc: linux-kernel, linux-arm-msm, linux-remoteproc,
	Deepak Kumar Singh, Andy Gross

Remote susbsystems notify fatal crash throught smp2p interrupt.
When modem/wifi crashes it can cause soc to come out of low power state
and may not allow again to enter in low power state until crash is handled.

Mark smp2p interrupt wakeup capable so that interrupt handler is executed
and remote susbsystem crash can be handled in system  resume path.

Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
---
 drivers/soc/qcom/smp2p.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
index 2df4883..646848b 100644
--- a/drivers/soc/qcom/smp2p.c
+++ b/drivers/soc/qcom/smp2p.c
@@ -18,6 +18,7 @@
 #include <linux/soc/qcom/smem.h>
 #include <linux/soc/qcom/smem_state.h>
 #include <linux/spinlock.h>
+#include <linux/pm_wakeirq.h>
 
 /*
  * The Shared Memory Point to Point (SMP2P) protocol facilitates communication
@@ -538,9 +539,20 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
 		goto unwind_interfaces;
 	}
 
+	/* Setup smp2p interrupt as wakeup source */
+	ret = device_init_wakeup(&pdev->dev, true);
+	if (ret)
+		goto unwind_interfaces;
+
+	ret = dev_pm_set_wake_irq(&pdev->dev, irq);
+	if (ret)
+		goto set_wakeup_failed;
 
 	return 0;
 
+set_wakeup_failed:
+	device_init_wakeup(&pdev->dev, false);
+
 unwind_interfaces:
 	list_for_each_entry(entry, &smp2p->inbound, node)
 		irq_domain_remove(entry->domain);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-09-13 19:42 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-16 10:05 [PATCH V2 1/1] soc: qcom: smp2p: Add wakeup capability to SMP2P IRQ Deepak Kumar Singh
2021-08-16 18:31 ` Matthias Kaehlcke
2021-08-16 20:23 ` Stephen Boyd
2021-09-13 17:45   ` Deepak Kumar Singh
2021-09-13 19:42     ` Stephen Boyd

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).