nios2: add gpio_request

This will be used by nand_plat.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>

arch/nios2/include/asm/gpio.h

@@ -21,6 +21,11 @@
 #ifdef CONFIG_SYS_GPIO_BASE
 #include <asm/io.h>
 
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+	return 0;
+}
+
 static inline int gpio_direction_input(unsigned gpio)
 {
 	writel(1, CONFIG_SYS_GPIO_BASE + (gpio << 2));
@@ -43,6 +48,7 @@ static inline void gpio_set_value(unsigned gpio, int value)
 	writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + (gpio << 2));
 }
 #else
+extern int gpio_request(unsigned gpio, const char *label);
 extern int gpio_direction_input(unsigned gpio);
 extern int gpio_direction_output(unsigned gpio, int value);
 extern int gpio_get_value(unsigned gpio);

board/altera/nios2-generic/gpio.c

@@ -15,6 +15,11 @@
 static u32 pio_data_reg;
 static u32 pio_dir_reg;
 
+int gpio_request(unsigned gpio, const char *label)
+{
+	return 0;
+}
+
 int gpio_direction_input(unsigned gpio)
 {
 	u32 mask = 1 << gpio;