66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
|
|
* linux/arch/arm/mach-sa1100/gpio.c
|
|
*
|
|
* Generic SA-1100 GPIO handling
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/gpio.h>
|
|
#include <asm/hardware.h>
|
|
#include "generic.h"
|
|
|
|
static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return GPLR & GPIO_GPIO(offset);
|
|
}
|
|
|
|
static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
if (value)
|
|
GPSR = GPIO_GPIO(offset);
|
|
else
|
|
GPCR = GPIO_GPIO(offset);
|
|
}
|
|
|
|
static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
GPDR &= ~GPIO_GPIO(offset);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
sa1100_gpio_set(chip, offset, value);
|
|
GPDR |= GPIO_GPIO(offset);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
static struct gpio_chip sa1100_gpio_chip = {
|
|
.label = "gpio",
|
|
.direction_input = sa1100_direction_input,
|
|
.direction_output = sa1100_direction_output,
|
|
.set = sa1100_gpio_set,
|
|
.get = sa1100_gpio_get,
|
|
.base = 0,
|
|
.ngpio = GPIO_MAX + 1,
|
|
};
|
|
|
|
void __init sa1100_init_gpio(void)
|
|
{
|
|
gpiochip_add(&sa1100_gpio_chip);
|
|
}
|