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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>
utp
Thomas Chou 2010-06-09 09:51:09 +08:00 committed by Scott McNutt
parent 06c5d30dc3
commit 6db6c18b50
2 changed files with 11 additions and 0 deletions
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6
arch/nios2/include/asm/gpio.h
View File

@ -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);

5
board/altera/nios2-generic/gpio.c
View File

@ -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;