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Commit 38aa5350 authored by Prasad Sodagudi's avatar Prasad Sodagudi Committed by Gerrit - the friendly Code Review server
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soc: qcom: Log the pending interrupts during the device resume 



Enable logging of interrupts that triggered device wakeup.
This logging information helps to debug IRQs caused periodic
device wakeups and prints the detailed information of pending
IPCC interrupts instead of GIC driver just printing ipcc
summary interrupt as wake up reason.

Change-Id: I52cce9b35b9176e3aa86580a49f0ea2c4ac1595b
Signed-off-by: default avatarPrasad Sodagudi <psodagud@codeaurora.org>
parent 3a82802e

drivers/soc/qcom/qcom_ipcc.c

+43 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/irqdomain.h>

#include <linux/syscore_ops.h>

#include <linux/platform_device.h>

#include <linux/mailbox_controller.h>

#include <dt-bindings/soc/qcom,ipcc.h>
@@ -60,6 +61,8 @@ struct ipcc_mbox_chan { 
	struct ipcc_protocol_data *proto_data;

};



static struct ipcc_protocol_data *ipcc_proto_data;



static inline u32 qcom_ipcc_get_packed_id(u16 client_id, u16 signal_id)

{

	return (client_id << IPCC_CLIENT_ID_SHIFT) | signal_id;
@@ -302,6 +305,43 @@ static int qcom_ipcc_setup_mbox(struct ipcc_protocol_data *proto_data, 
	return mbox_controller_register(mbox);

}



#ifdef CONFIG_PM

static int msm_ipcc_suspend(void)

{

	return 0;

}



static void msm_ipcc_resume(void)

{

	int virq;

	struct irq_desc *desc;

	const char *name = "null";

	u32 packed_id;

	struct ipcc_protocol_data *proto_data = ipcc_proto_data;



	packed_id = readl_no_log(proto_data->base + IPCC_REG_RECV_ID);

	if (packed_id == IPCC_NO_PENDING_IRQ)

		return;



	virq = irq_find_mapping(proto_data->irq_domain, packed_id);

	desc = irq_to_desc(virq);

	if (desc == NULL)

		name = "stray irq";

	else if (desc->action && desc->action->name)

		name = desc->action->name;



	pr_warn("%s: %d triggered %s\n", __func__, virq, name);

}

#else

#define msm_ipcc_suspend NULL

#define msm_ipcc_resume NULL

#endif



static struct syscore_ops msm_ipcc_pm_ops = {

	.suspend = msm_ipcc_suspend,

	.resume = msm_ipcc_resume,

};



static int qcom_ipcc_probe(struct platform_device *pdev)

{

	struct ipcc_protocol_data *proto_data;
@@ -314,6 +354,7 @@ static int qcom_ipcc_probe(struct platform_device *pdev) 
	if (!proto_data)

		return -ENOMEM;



	ipcc_proto_data = proto_data;

	proto_data->dev = &pdev->dev;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -361,6 +402,7 @@ static int qcom_ipcc_probe(struct platform_device *pdev) 


	enable_irq_wake(proto_data->irq);

	platform_set_drvdata(pdev, proto_data);

	register_syscore_ops(&msm_ipcc_pm_ops);



	return 0;
@@ -376,6 +418,7 @@ static int qcom_ipcc_remove(struct platform_device *pdev) 
{

	struct ipcc_protocol_data *proto_data = platform_get_drvdata(pdev);



	unregister_syscore_ops(&msm_ipcc_pm_ops);

	disable_irq_wake(proto_data->irq);

	if (proto_data->num_chans)

		mbox_controller_unregister(&proto_data->mbox);