#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).
#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;
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);
#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.
*/