[ARM] 4961/1: gpiolib support for SA-1100 architecture

This adds gpiolib support for the SA-1100 arch:
 - Move all GPIO API functions from generic.c into gpio.c
 - Convert all gpio functions into gpiolib callbacks.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 12 insertions, 19 deletions

diff --git a/include/asm-arm/arch-sa1100/gpio.h b/include/asm-arm/arch-sa1100/gpio.h
index e7a9d26e22a8..93d3395b102d 100644
--- a/include/asm-arm/arch-sa1100/gpio.h
+++ b/include/asm-arm/arch-sa1100/gpio.h
@@ -26,35 +26,28 @@
 
 #include <asm/hardware.h>
 #include <asm/irq.h>
-
-static inline int gpio_request(unsigned gpio, const char *label)
-{
-        return 0;
-}
-
-static inline void gpio_free(unsigned gpio)
-{
-        return;
-}
-
-extern int gpio_direction_input(unsigned gpio);
-extern int gpio_direction_output(unsigned gpio, int value);
-
+#include <asm-generic/gpio.h>
 
 static inline int gpio_get_value(unsigned gpio)
 {
-        return GPLR & GPIO_GPIO(gpio);
+        if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
+                return GPLR & GPIO_GPIO(gpio);
+        else
+                return __gpio_get_value(gpio);
 }
 
 static inline void gpio_set_value(unsigned gpio, int value)
 {
-        if (value)
-                GPSR = GPIO_GPIO(gpio);
+        if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
+                if (value)
+                        GPSR = GPIO_GPIO(gpio);
+                else
+                        GPCR = GPIO_GPIO(gpio);
         else
-                GPCR = GPIO_GPIO(gpio);
+                __gpio_set_value(gpio, value);
 }
 
-#include <asm-generic/gpio.h>                   /* cansleep wrappers */
+#define gpio_cansleep   __gpio_cansleep
 
 static inline unsigned gpio_to_irq(unsigned gpio)
 {