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Commit 69dc3fcd authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar Committed by David Collins
Browse files

spmi: pmic-arb: support show_resume_irq 



show_resume_irq is used to debug interrupts that cause wakeup.
Support it for spmi arbiter's interrupt controller.

Change-Id: I52d51c09d7ff316248542c84a1cd65a28e2283da
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent 57132f55

drivers/spmi/spmi-pmic-arb.c

+43 −8
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/spmi.h>

#include <linux/syscore_ops.h>



/* PMIC Arbiter configuration registers */

#define PMIC_ARB_VERSION		0x0000
@@ -159,6 +160,7 @@ struct spmi_pmic_arb { 
	u16			last_apid;

	struct apid_data	apid_data[PMIC_ARB_MAX_PERIPHS];

};

static struct spmi_pmic_arb *the_pa;



/**

 * pmic_arb_ver: version dependent functionality.
@@ -525,7 +527,7 @@ static void cleanup_irq(struct spmi_pmic_arb *pa, u16 apid, int id) 
				irq_mask, ppid);

}



static void periph_interrupt(struct spmi_pmic_arb *pa, u16 apid)

static void periph_interrupt(struct spmi_pmic_arb *pa, u16 apid, bool show)

{

	unsigned int irq;

	u32 status;
@@ -542,22 +544,32 @@ static void periph_interrupt(struct spmi_pmic_arb *pa, u16 apid) 
			cleanup_irq(pa, apid, id);

			continue;

		}

		if (show) {

			struct irq_desc *desc;

			const char *name = "null";



			desc = irq_to_desc(irq);

			if (desc == NULL)

				name = "stray irq";

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

				name = desc->action->name;



			pr_warn("spmi_show_resume_irq: %d triggered [0x%01x, 0x%02x, 0x%01x] %s\n",

				irq, sid, per, id, name);

		} else {

			generic_handle_irq(irq);

		}

	}

}



static void pmic_arb_chained_irq(struct irq_desc *desc)

static void __pmic_arb_chained_irq(struct spmi_pmic_arb *pa, bool show)

{

	struct spmi_pmic_arb *pa = irq_desc_get_handler_data(desc);

	struct irq_chip *chip = irq_desc_get_chip(desc);

	void __iomem *intr = pa->intr;

	int first = pa->min_apid >> 5;

	int last = pa->max_apid >> 5;

	u32 status, enable;

	int i, id, apid;



	chained_irq_enter(chip, desc);



	for (i = first; i <= last; ++i) {

		status = readl_relaxed(intr +

				      pa->ver_ops->owner_acc_status(pa->ee, i));
@@ -568,10 +580,18 @@ static void pmic_arb_chained_irq(struct irq_desc *desc) 
			enable = readl_relaxed(intr +

					pa->ver_ops->acc_enable(apid));

			if (enable & SPMI_PIC_ACC_ENABLE_BIT)

				periph_interrupt(pa, apid);

				periph_interrupt(pa, apid, show);

		}

	}

}



static void pmic_arb_chained_irq(struct irq_desc *desc)

{

	struct spmi_pmic_arb *pa = irq_desc_get_handler_data(desc);

	struct irq_chip *chip = irq_desc_get_chip(desc);



	chained_irq_enter(chip, desc);

	__pmic_arb_chained_irq(pa, false);

	chained_irq_exit(chip, desc);

}
@@ -988,6 +1008,16 @@ static const struct irq_domain_ops pmic_arb_irq_domain_ops = { 
	.xlate	= qpnpint_irq_domain_dt_translate,

};



static void spmi_pmic_arb_resume(void)

{

	if (spmi_show_resume_irq())

		__pmic_arb_chained_irq(the_pa, true);

}



static struct syscore_ops spmi_pmic_arb_syscore_ops = {

	.resume = spmi_pmic_arb_resume,

};



static int spmi_pmic_arb_probe(struct platform_device *pdev)

{

	struct spmi_pmic_arb *pa;
@@ -1154,6 +1184,8 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) 
	if (err)

		goto err_domain_remove;



	the_pa = pa;

	register_syscore_ops(&spmi_pmic_arb_syscore_ops);

	return 0;



err_domain_remove:
@@ -1168,8 +1200,11 @@ static int spmi_pmic_arb_remove(struct platform_device *pdev) 
{

	struct spmi_controller *ctrl = platform_get_drvdata(pdev);

	struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl);



	spmi_controller_remove(ctrl);

	irq_set_chained_handler_and_data(pa->irq, NULL, NULL);

	unregister_syscore_ops(&spmi_pmic_arb_syscore_ops);

	the_pa = NULL;

	irq_domain_remove(pa->domain);

	spmi_controller_put(ctrl);

	return 0;

include/linux/spmi.h

+14 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2016, 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
@@ -171,6 +171,19 @@ static inline void spmi_driver_unregister(struct spmi_driver *sdrv) 
	module_driver(__spmi_driver, spmi_driver_register, \

			spmi_driver_unregister)



#ifdef CONFIG_QCOM_SHOW_RESUME_IRQ

extern int msm_show_resume_irq_mask;

static inline bool spmi_show_resume_irq(void)

{

	return msm_show_resume_irq_mask;

}

#else

static inline bool spmi_show_resume_irq(void)

{

	return false;

}

#endif



int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);

int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,

			   size_t len);