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nios2: add gpio_is_valid 

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
This commit is contained in:
Thomas Chou 2010-12-27 10:46:01 +08:00 committed by Scott McNutt
parent 85debefaf2
commit d8a593c68b
3 changed files with 13 additions and 0 deletions
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6
arch/nios2/include/asm/gpio.h
View File

@ -52,6 +52,11 @@ static inline void gpio_set_value(unsigned gpio, int value)
{
writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + (gpio << 2));
}
static inline int gpio_is_valid(int number)
{
return ((unsigned)number) < CONFIG_SYS_GPIO_WIDTH;
}
#else
extern int gpio_request(unsigned gpio, const char *label);
extern int gpio_free(unsigned gpio);
@ -59,6 +64,7 @@ extern int gpio_direction_input(unsigned gpio);
extern int gpio_direction_output(unsigned gpio, int value);
extern int gpio_get_value(unsigned gpio);
extern void gpio_set_value(unsigned gpio, int value);
extern int gpio_is_valid(int number);
#endif /* CONFIG_SYS_GPIO_BASE */
#endif /* _ASM_NIOS2_GPIO_H_ */

1
board/altera/nios2-generic/custom_fpga.h
View File

@ -50,6 +50,7 @@
/* led_pio.s1 is a altera_avalon_pio */
#define LED_PIO_BASE 0x82120870
#define LED_PIO_WIDTH 8
/* high_res_timer.s1 is a altera_avalon_timer */
#define CONFIG_SYS_TIMER_BASE 0x82120820

6
board/altera/nios2-generic/gpio.c
View File

@ -10,6 +10,7 @@
#ifndef CONFIG_SYS_GPIO_BASE
#define ALTERA_PIO_BASE LED_PIO_BASE
#define ALTERA_PIO_WIDTH LED_PIO_WIDTH
#define ALTERA_PIO_DATA (ALTERA_PIO_BASE + 0)
#define ALTERA_PIO_DIR (ALTERA_PIO_BASE + 4)
static u32 pio_data_reg;
@ -62,4 +63,9 @@ void gpio_set_value(unsigned gpio, int value)
pio_data_reg &= ~mask;
writel(pio_data_reg, ALTERA_PIO_DATA);
}
int gpio_is_valid(int number)
{
return ((unsigned)number) < ALTERA_PIO_WIDTH;
}
#endif