genirq: Add chip suspend and resume callbacks

These callbacks are only called in the syscore suspend/resume code on
interrupt chips which have been registered via the generic irq chip
mechanism. Calling those callbacks per irq would be rather icky, but
with the generic irq chip mechanism we can call this per registered
chip.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 2ba2f1216790..8b4538446636 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -280,6 +280,9 @@ static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
  * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
  * @irq_cpu_online:     configure an interrupt source for a secondary CPU
  * @irq_cpu_offline:    un-configure an interrupt source for a secondary CPU
+ * @irq_suspend:        function called from core code on suspend once per chip
+ * @irq_resume:         function called from core code on resume once per chip
+ * @irq_pm_shutdown:    function called from core code on shutdown once per chip
  * @irq_print_chip:     optional to print special chip info in show_interrupts
  * @flags:              chip specific flags
  *
@@ -309,6 +312,10 @@ struct irq_chip {
         void            (*irq_cpu_online)(struct irq_data *data);
         void            (*irq_cpu_offline)(struct irq_data *data);
 
+        void            (*irq_suspend)(struct irq_data *data);
+        void            (*irq_resume)(struct irq_data *data);
+        void            (*irq_pm_shutdown)(struct irq_data *data);
+
         void            (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
 
         unsigned long   flags;
@@ -626,6 +633,7 @@ struct irq_chip_type {
  * @wake_active:        Interrupt is marked as an wakeup from suspend source
  * @num_ct:             Number of available irq_chip_type instances (usually 1)
  * @private:            Private data for non generic chip callbacks
+ * @list:               List head for keeping track of instances
  * @chip_types:         Array of interrupt irq_chip_types
  *
  * Note, that irq_chip_generic can have multiple irq_chip_type
@@ -646,6 +654,7 @@ struct irq_chip_generic {
         u32                     wake_active;
         unsigned int            num_ct;
         void                    *private;
+        struct list_head        list;
         struct irq_chip_type    chip_types[0];
 };
 
@@ -680,6 +689,8 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
                             enum irq_gc_flags flags, unsigned int clr,
                             unsigned int set);
 int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
+void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
+                             unsigned int clr, unsigned int set);
 
 static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
 {