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Commit d723a221 authored by Murali Nalajala's avatar Murali Nalajala Committed by Matt Wagantall
Browse files

lpm-levels: Do not disable non-sec interrupts in suspend 



When the system suspend is happening, last core disables
the non-sec interrupts at QGIC by setting the GRPEN1_EL1_NS
to ZERO. This makes core not seen any non-sec interrupts
and would result into system do not wake up from any of
interrupts. Do not touch GRPEN1_EL1_NS register while
system is going into suspend.

Change-Id: I7d6c5047fb4743df187fe49fba18b64db3179bc9
Signed-off-by: default avatarMurali Nalajala <mnalajal@codeaurora.org>
parent 8240cb0d

drivers/irqchip/irq-gic-common.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/of.h>

#include <linux/irqdomain.h>



extern bool from_suspend;

extern struct irq_chip gic_arch_extn;



void gic_configure_irq(unsigned int irq, unsigned int type,

drivers/irqchip/irq-gic-v3.c

+3 −0
Original line number Diff line number Diff line
@@ -700,6 +700,9 @@ int gic_set_wake(struct irq_data *d, unsigned int on) 
static int gic_cpu_pm_notifier(struct notifier_block *self,

			       unsigned long cmd, void *v)

{

	if (from_suspend)

		return NOTIFY_OK;



	if (cmd == CPU_PM_EXIT) {

		gic_enable_redist(true);

		gic_cpu_sys_reg_init();

kernel/cpu_pm.c

+4 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <linux/spinlock.h>

#include <linux/syscore_ops.h>



bool from_suspend = false;



static DEFINE_RWLOCK(cpu_pm_notifier_lock);

static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);
@@ -208,6 +210,7 @@ static int cpu_pm_suspend(void) 
{

	int ret;



	from_suspend = true;

	ret = cpu_pm_enter();

	if (ret)

		return ret;
@@ -218,6 +221,7 @@ static int cpu_pm_suspend(void) 


static void cpu_pm_resume(void)

{

	from_suspend = false;

	cpu_cluster_pm_exit(0);

	cpu_pm_exit();

}