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drivers: qcom: sdx_ext_ipc: keep wakeup irq always on

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When suspend is in progress on local processor, if
remote processor toggles GPIO to indicate a resume
event to local processor, this event may get lost.
This commit addresses this situation.

1. Add IRQF_NO_SUSPEND flag so that wakeup_irq is
not disabled during suspend on local processor.

2. Install primary handler that inform pm core
that a system wakeup event has happened. The pm
core can then abort a suspend in progress.

Change-Id: I8d84f15a118c4630bde7b9db35ffadddeb937cb9
Signed-off-by: Pavankumar Vijapur <pvijapur@codeaurora.org>
Signed-off-by: Yogesh Lal <ylal@codeaurora.org>
This commit is contained in:
Pavankumar Vijapur 2021-02-01 12:35:52 +05:30 • committed by Karthick Shanmugham
commit 445f77d01d
1 changed files with 10 additions and 3 deletions
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13
drivers/soc/qcom/sdx_ext_ipc.c
View file

@ -11,6 +11,7 @@
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/suspend.h>
#include <soc/qcom/sb_notification.h>
#define STATUS_UP 1
@ -304,6 +305,12 @@ static int sdx_ext_ipc_panic(struct notifier_block *this,
return NOTIFY_DONE;
}
static irqreturn_t hw_irq_handler(int irq, void *p)
{
pm_system_wakeup();
return IRQ_WAKE_THREAD;
}
static int sdx_ext_ipc_probe(struct platform_device *pdev)
{
int ret;
@ -371,9 +378,9 @@ static int sdx_ext_ipc_probe(struct platform_device *pdev)
if (mdm->gpios[WAKEUP_IN] >= 0) {
ret = devm_request_threaded_irq(mdm->dev, mdm->wakeup_irq,
sdx_ext_ipc_wakeup_irq, NULL,
IRQF_TRIGGER_FALLING, "sdx_ext_ipc_wakeup",
mdm);
hw_irq_handler, sdx_ext_ipc_wakeup_irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
IRQF_NO_SUSPEND, "sdx_ext_ipc_wakeup", mdm);
if (ret < 0) {
dev_err(mdm->dev,
"%s: WAKEUP_IN IRQ#%d request failed,\n",