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spmi: pmic-arb: support show_resume_irq

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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: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
This commit is contained in:
Abhijeet Dharmapurikar 2016-11-07 15:51:24 -08:00
parent 85d7e134cc
commit 9c08064350
2 changed files with 57 additions and 9 deletions
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51
drivers/spmi/spmi-pmic-arb.c
View file

@ -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;
}
generic_handle_irq(irq);
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;
@ -1153,6 +1183,8 @@ 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:
@ -1167,8 +1199,11 @@ 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;

15
include/linux/spmi.h
View file

@ -1,4 +1,4 @@
/* 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);