gpiolib: gpio_to_irq() hooks

[linux-2.6-omap-h63xx.git] / include / asm-generic / gpio.h

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index c764a8fcb058e33fb703e56af17eaa7fb966d7ea..04cb1d175df1782274bda4d9098d43937ae6f60c 100644 (file)
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -2,6 +2,7 @@
 #define _ASM_GENERIC_GPIO_H
 
 #include <linux/types.h>
+#include <linux/errno.h>
 
 #ifdef CONFIG_GPIOLIB
 
@@ -39,6 +40,8 @@ struct module;
  *     returns either the value actually sensed, or zero
  * @direction_output: configures signal "offset" as output, or returns error
  * @set: assigns output value for signal "offset"
+ * @to_irq: optional hook supporting non-static gpio_to_irq() mappings;
+ *     implementation may not sleep
  * @dbg_show: optional routine to show contents in debugfs; default code
  *     will be used when this is omitted, but custom code can show extra
  *     state (such as pullup/pulldown configuration).
@@ -60,7 +63,7 @@ struct module;
  * is calculated by subtracting @base from the gpio number.
  */
 struct gpio_chip {
-       char                    *label;
+       const char              *label;
        struct device           *dev;
        struct module           *owner;
 
@@ -72,6 +75,10 @@ struct gpio_chip {
                                                unsigned offset, int value);
        void                    (*set)(struct gpio_chip *chip,
                                                unsigned offset, int value);
+
+       int                     (*to_irq)(struct gpio_chip *chip,
+                                               unsigned offset);
+
        void                    (*dbg_show)(struct seq_file *s,
                                                struct gpio_chip *chip);
        int                     base;
@@ -111,6 +118,7 @@ extern void __gpio_set_value(unsigned gpio, int value);
 
 extern int __gpio_cansleep(unsigned gpio);
 
+extern int __gpio_to_irq(unsigned gpio);
 
 #ifdef CONFIG_GPIO_SYSFS