genirq: add threaded interrupt handler support

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / interrupt.h

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 0c9cb63e689530cfbc6a060b8a0b07ff2175bd62..6fc2b720c231200cbd69e1bf001f87caead8f907 100644 (file)
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -59,6 +59,16 @@
 #define IRQF_NOBALANCING       0x00000800
 #define IRQF_IRQPOLL           0x00001000
 
+/*
+ * Bits used by threaded handlers:
+ * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
+ * IRQTF_DIED      - handler thread died
+ */
+enum {
+       IRQTF_RUNTHREAD,
+       IRQTF_DIED,
+};
+
 typedef irqreturn_t (*irq_handler_t)(int, void *);
 
 /**
@@ -71,6 +81,9 @@ typedef irqreturn_t (*irq_handler_t)(int, void *);
  * @next:      pointer to the next irqaction for shared interrupts
  * @irq:       interrupt number
  * @dir:       pointer to the proc/irq/NN/name entry
+ * @thread_fn: interupt handler function for threaded interrupts
+ * @thread:    thread pointer for threaded interrupts
+ * @thread_flags:      flags related to @thread
  */
 struct irqaction {
        irq_handler_t handler;
@@ -81,11 +94,31 @@ struct irqaction {
        struct irqaction *next;
        int irq;
        struct proc_dir_entry *dir;
+       irq_handler_t thread_fn;
+       struct task_struct *thread;
+       unsigned long thread_flags;
 };
 
 extern irqreturn_t no_action(int cpl, void *dev_id);
-extern int __must_check request_irq(unsigned int, irq_handler_t handler,
-                      unsigned long, const char *, void *);
+
+extern int __must_check
+request_threaded_irq(unsigned int irq, irq_handler_t handler,
+                    irq_handler_t thread_fn,
+                    unsigned long flags, const char *name, void *dev);
+
+static inline int __must_check
+request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
+           const char *name, void *dev)
+{
+       return request_threaded_irq(irq, handler, NULL, flags, name, dev);
+}
+
+#ifdef CONFIG_GENERIC_HARDIRQS
+extern void exit_irq_thread(void);
+#else
+static inline void exit_irq_thread(void) { }
+#endif
+
 extern void free_irq(unsigned int, void *);
 
 struct device;