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Commit 99319e45 authored by Prasad Sodagudi's avatar Prasad Sodagudi
Browse files

pinctrl: qcom: Add syscore system suspend/resume 



Add syscore system suspend and resume handlers,
to print gpio interrupts status during device resume.

Change-Id: I7c574d2e44a7e318ac9ef89063d2081bf63c09b6
Signed-off-by: default avatarPrasad Sodagudi <psodagud@codeaurora.org>
parent 22b7c752

drivers/pinctrl/qcom/pinctrl-msm.c

+54 −2
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2013, Sony Mobile Communications AB.

 * Copyright (c) 2013, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -27,6 +27,7 @@ 
#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/spinlock.h>

#include <linux/syscore_ops.h>

#include <linux/reboot.h>

#include <linux/pm.h>

#include <linux/log2.h>
@@ -70,6 +71,8 @@ struct msm_pinctrl { 
	void __iomem *regs;

};



static struct msm_pinctrl *msm_pinctrl_data;



static int msm_get_groups_count(struct pinctrl_dev *pctldev)

{

	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
@@ -877,6 +880,52 @@ static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl) 
		}

}



#ifdef CONFIG_PM

static int msm_pinctrl_suspend(void)

{

	return 0;

}



static void msm_pinctrl_resume(void)

{

	int i, irq;

	u32 val;

	unsigned long flags;

	struct irq_desc *desc;

	const struct msm_pingroup *g;

	const char *name = "null";

	struct msm_pinctrl *pctrl = msm_pinctrl_data;



	if (!msm_show_resume_irq_mask)

		return;



	raw_spin_lock_irqsave(&pctrl->lock, flags);

	for_each_set_bit(i, pctrl->enabled_irqs, pctrl->chip.ngpio) {

		g = &pctrl->soc->groups[i];

		val = readl_relaxed(pctrl->regs + g->intr_status_reg);

		if (val & BIT(g->intr_status_bit)) {

			irq = irq_find_mapping(pctrl->chip.irqdomain, i);

			desc = irq_to_desc(irq);

			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__, irq, name);

		}

	}

	raw_spin_unlock_irqrestore(&pctrl->lock, flags);

}

#else

#define msm_pinctrl_suspend NULL

#define msm_pinctrl_resume NULL

#endif



static struct syscore_ops msm_pinctrl_pm_ops = {

	.suspend = msm_pinctrl_suspend,

	.resume = msm_pinctrl_resume,

};



int msm_pinctrl_probe(struct platform_device *pdev,

		      const struct msm_pinctrl_soc_data *soc_data)

{
@@ -884,7 +933,8 @@ int msm_pinctrl_probe(struct platform_device *pdev, 
	struct resource *res;

	int ret;



	pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);

	msm_pinctrl_data = pctrl = devm_kzalloc(&pdev->dev,

				sizeof(*pctrl), GFP_KERNEL);

	if (!pctrl) {

		dev_err(&pdev->dev, "Can't allocate msm_pinctrl\n");

		return -ENOMEM;
@@ -924,6 +974,7 @@ int msm_pinctrl_probe(struct platform_device *pdev, 


	platform_set_drvdata(pdev, pctrl);



	register_syscore_ops(&msm_pinctrl_pm_ops);

	dev_dbg(&pdev->dev, "Probed Qualcomm pinctrl driver\n");



	return 0;
@@ -937,6 +988,7 @@ int msm_pinctrl_remove(struct platform_device *pdev) 
	gpiochip_remove(&pctrl->chip);



	unregister_restart_handler(&pctrl->restart_nb);

	unregister_syscore_ops(&msm_pinctrl_pm_ops);



	return 0;

}

drivers/pinctrl/qcom/pinctrl-msm.h

+1 −0
Original line number Diff line number Diff line
@@ -121,4 +121,5 @@ int msm_pinctrl_probe(struct platform_device *pdev, 
		      const struct msm_pinctrl_soc_data *soc_data);

int msm_pinctrl_remove(struct platform_device *pdev);



extern int msm_show_resume_irq_mask;

#endif