You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.1 KiB
48 lines
1.1 KiB
/*
|
|
* arch/arm/plat-iop/gpio.c
|
|
* GPIO handling for Intel IOP3xx processors.
|
|
*
|
|
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <asm/hardware/iop3xx.h>
|
|
|
|
void gpio_line_config(int line, int direction)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
if (direction == GPIO_IN) {
|
|
*IOP3XX_GPOE |= 1 << line;
|
|
} else if (direction == GPIO_OUT) {
|
|
*IOP3XX_GPOE &= ~(1 << line);
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_line_config);
|
|
|
|
int gpio_line_get(int line)
|
|
{
|
|
return !!(*IOP3XX_GPID & (1 << line));
|
|
}
|
|
EXPORT_SYMBOL(gpio_line_get);
|
|
|
|
void gpio_line_set(int line, int value)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
if (value == GPIO_LOW) {
|
|
*IOP3XX_GPOD &= ~(1 << line);
|
|
} else if (value == GPIO_HIGH) {
|
|
*IOP3XX_GPOD |= 1 << line;
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_line_set);
|
|
|