genirq: Add flags to irq_chip

Looking through irq_chip implementations I noticed that some of them
have special requirements, like setting the type masked and therefor
fiddle in irq_desc->status. Add a flag field, so the core code can
handle it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 2e3d1e5..aefb30b 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -253,6 +253,7 @@ static inline bool irqd_is_level_type(struct irq_data *d)
  * @irq_set_wake:      enable/disable power-management wake-on of an IRQ
  * @irq_bus_lock:      function to lock access to slow bus (i2c) chips
  * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
+ * @flags:             chip specific flags
  *
  * @release:           release function solely used by UML
  */
@@ -299,6 +300,8 @@ struct irq_chip {
        void            (*irq_bus_lock)(struct irq_data *data);
        void            (*irq_bus_sync_unlock)(struct irq_data *data);
 
+       unsigned long   flags;
+
        /* Currently used only by UML, might disappear one day.*/
 #ifdef CONFIG_IRQ_RELEASE_METHOD
        void            (*release)(unsigned int irq, void *dev_id);