X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-generic%2Fgpio.h;h=6be061d09da9d06fc2dabdb520148c028194621b;hb=252815b0cfe711001eff0327872209986b36d490;hp=f29a502f4a6c3d1a656ae5142f52b98fe6421408;hpb=4f02f8220562591322c118d07a32bebf705318b7;p=linux-2.6

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index f29a502f4a..6be061d09d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -1,8 +1,12 @@
 #ifndef _ASM_GENERIC_GPIO_H
 #define _ASM_GENERIC_GPIO_H
 
+#include <linux/types.h>
+
 #ifdef CONFIG_HAVE_GPIO_LIB
 
+#include <linux/compiler.h>
+
 /* Platforms may implement their GPIO interface with library code,
  * at a small performance cost for non-inlined operations and some
  * extra memory (for code and for per-GPIO table entries).
@@ -16,7 +20,14 @@
 #define ARCH_NR_GPIOS		256
 #endif
 
+static inline int gpio_is_valid(int number)
+{
+	/* only some non-negative numbers are valid */
+	return ((unsigned)number) < ARCH_NR_GPIOS;
+}
+
 struct seq_file;
+struct module;
 
 /**
  * struct gpio_chip - abstract a GPIO controller
@@ -48,6 +59,7 @@ struct seq_file;
  */
 struct gpio_chip {
 	char			*label;
+	struct module		*owner;
 
 	int			(*direction_input)(struct gpio_chip *chip,
 						unsigned offset);
@@ -66,6 +78,7 @@ struct gpio_chip {
 
 extern const char *gpiochip_is_requested(struct gpio_chip *chip,
 			unsigned offset);
+extern int __must_check gpiochip_reserve(int start, int ngpio);
 
 /* add/remove chips */
 extern int gpiochip_add(struct gpio_chip *chip);
@@ -97,6 +110,12 @@ extern int __gpio_cansleep(unsigned gpio);
 
 #else
 
+static inline int gpio_is_valid(int number)
+{
+	/* only non-negative numbers are valid */
+	return number >= 0;
+}
+
 /* platforms that don't directly support access to GPIOs through I2C, SPI,
  * or other blocking infrastructure can use these wrappers.
  */