[ARM] 5373/2: Add gpiolib support to AT91

Add support for gpiolib, including debugfs output, to the AT91 family.
The at91_get/set_gpio_value calls still exist since they are used by the
atmel serial driver.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -241,6 +241,7 @@ config ARCH_VERSATILE
 config ARCH_AT91
 	bool "Atmel AT91"
 	select GENERIC_GPIO
+	select ARCH_REQUIRE_GPIOLIB
 	select HAVE_CLK
 	help
 	  This enables support for systems based on the Atmel AT91RM9200,

arch/arm/mach-at91/generic.h

@@ -47,9 +47,6 @@ extern void at91_irq_resume(void);
 #define AT91RM9200_BGA		4	/* AT91RM9200 BGA package has 4 banks */
 
 struct at91_gpio_bank {
-	unsigned chipbase;		/* bank's first GPIO number */
-	void __iomem *regbase;		/* base of register bank */
-	struct at91_gpio_bank *next;	/* bank sharing same IRQ/clock/... */
 	unsigned short id;		/* peripheral ID */
 	unsigned long offset;		/* offset from system peripheral base */
 	struct clk *clock;		/* associated clock */

arch/arm/mach-at91/include/mach/gpio.h

@@ -213,32 +213,12 @@ extern void at91_gpio_resume(void);
  */
 
 #include <asm/errno.h>
-
-static inline int gpio_request(unsigned gpio, const char *label)
-{
-	return 0;
-}
-
-static inline void gpio_free(unsigned gpio)
-{
-	might_sleep();
-}
-
-extern int gpio_direction_input(unsigned gpio);
-extern int gpio_direction_output(unsigned gpio, int value);
-
-static inline int gpio_get_value(unsigned gpio)
-{
-	return at91_get_gpio_value(gpio);
-}
-
-static inline void gpio_set_value(unsigned gpio, int value)
-{
-	at91_set_gpio_value(gpio, value);
-}
-
 #include <asm-generic/gpio.h>		/* cansleep wrappers */
 
+#define gpio_get_value	__gpio_get_value
+#define gpio_set_value	__gpio_set_value
+#define gpio_cansleep	__gpio_cansleep
+
 static inline int gpio_to_irq(unsigned gpio)
 {
 	return gpio;