Merge tag 'irqchip-4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip updates for 4.15, take #4 from Marc Zyngier

 - A core irq fix for legacy cases where the irq trigger is not reported
   by firmware

 - A couple of GICv3/4 fixes (Kconfig, of-node refcount, error handling)

 - Trivial pr_err fixes

1 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index b01d06db9101..e140f69163b6 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -211,6 +211,7 @@ struct irq_data {
  * IRQD_MANAGED_SHUTDOWN	- Interrupt was shutdown due to empty affinity
  *				  mask. Applies only to affinity managed irqs.
  * IRQD_SINGLE_TARGET		- IRQ allows only a single affinity target
+ * IRQD_DEFAULT_TRIGGER_SET	- Expected trigger already been set
  */
 enum {
 	IRQD_TRIGGER_MASK		= 0xf,
@@ -231,6 +232,7 @@ enum {
 	IRQD_IRQ_STARTED		= (1 << 22),
 	IRQD_MANAGED_SHUTDOWN		= (1 << 23),
 	IRQD_SINGLE_TARGET		= (1 << 24),
+	IRQD_DEFAULT_TRIGGER_SET	= (1 << 25),
 };
 
 #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
@@ -260,18 +262,25 @@ static inline void irqd_mark_affinity_was_set(struct irq_data *d)
 	__irqd_to_state(d) |= IRQD_AFFINITY_SET;
 }
 
+static inline bool irqd_trigger_type_was_set(struct irq_data *d)
+{
+	return __irqd_to_state(d) & IRQD_DEFAULT_TRIGGER_SET;
+}
+
 static inline u32 irqd_get_trigger_type(struct irq_data *d)
 {
 	return __irqd_to_state(d) & IRQD_TRIGGER_MASK;
 }
 
 /*
- * Must only be called inside irq_chip.irq_set_type() functions.
+ * Must only be called inside irq_chip.irq_set_type() functions or
+ * from the DT/ACPI setup code.
  */
 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
 {
 	__irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;
 	__irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;
+	__irqd_to_state(d) |= IRQD_DEFAULT_TRIGGER_SET;
 }
 
 static inline bool irqd_is_level_type(struct irq_data *d)