[PATCH 3/3] ARM: OMAP2+: remove misuse of IRQF_NO_SUSPEND flag

[Sudeep Holla]

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags replacing it with
enable_irq_wake instead.

Cc: Grygorii Strashko <grygorii.strashko at ti.com>
Cc: Tony Lindgren <tony at atomide.com>
Cc: linux-omap at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
---
 arch/arm/mach-omap2/mux.c        | 4 ++--
 arch/arm/mach-omap2/pm34xx.c     | 9 ++++-----
 arch/arm/mach-omap2/prm_common.c | 1 +
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 176eef6ef338..12012bef8e63 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -810,13 +810,13 @@ int __init omap_mux_late_init(void)
 		return 0;
 
 	ret = request_irq(omap_prcm_event_to_irq("io"),
-		omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,
+		omap_hwmod_mux_handle_irq, IRQF_SHARED,
 			"hwmod_io", omap_mux_late_init);
 
 	if (ret)
 		pr_warn("mux: Failed to setup hwmod io irq %d\n", ret);
 
-	return 0;
+	return enable_irq_wake(omap_prcm_event_to_irq("io"));
 }
 
 static void __init omap_mux_package_fixup(struct omap_mux *p,
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 2dbd3785ee6f..49604e0023c4 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -472,23 +472,22 @@ int __init omap3_pm_init(void)
 	prcm_setup_regs();
 
 	ret = request_irq(omap_prcm_event_to_irq("wkup"),
-		_prcm_int_handle_wakeup, IRQF_NO_SUSPEND, "pm_wkup", NULL);
+		_prcm_int_handle_wakeup, 0, "pm_wkup", NULL);
 
 	if (ret) {
 		pr_err("pm: Failed to request pm_wkup irq\n");
 		goto err1;
 	}
+	enable_irq_wake(omap_prcm_event_to_irq("wkup"));
 
 	/* IO interrupt is shared with mux code */
 	ret = request_irq(omap_prcm_event_to_irq("io"),
-		_prcm_int_handle_io, IRQF_SHARED | IRQF_NO_SUSPEND, "pm_io",
-		omap3_pm_init);
-	enable_irq(omap_prcm_event_to_irq("io"));
-
+		_prcm_int_handle_io, IRQF_SHARED, "pm_io", omap3_pm_init);
 	if (ret) {
 		pr_err("pm: Failed to request pm_io irq\n");
 		goto err2;
 	}
+	enable_irq_wake(omap_prcm_event_to_irq("io"));
 
 	ret = pwrdm_for_each(pwrdms_setup, NULL);
 	if (ret) {
diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 5b2f5138d938..7af688273e0d 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -338,6 +338,7 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
 		ct->chip.irq_ack = irq_gc_ack_set_bit;
 		ct->chip.irq_mask = irq_gc_mask_clr_bit;
 		ct->chip.irq_unmask = irq_gc_mask_set_bit;
+		ct->chip.flags = IRQCHIP_SKIP_SET_WAKE;
 
 		ct->regs.ack = irq_setup->ack + i * 4;
 		ct->regs.mask = irq_setup->mask + i * 4;
-- 
1.9.1