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/*
* arch/arm/mach-ns9xxx/gpiolib-ns921x.c
*
* Copyright (C) 2007-2008 by Digi International Inc.
* All rights reserved.
*
* 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/errno.h>
#include <asm/gpio.h>
#include <mach/processor.h>
static int ns921x_gpio_chip_get(struct gpio_chip *chip, unsigned offset)
{
return gpio_get_value_ns921x(chip->base + offset);
}
static void ns921x_gpio_chip_set(struct gpio_chip *chip,
unsigned offset, int value)
{
gpio_set_value_ns921x_unlocked(chip->base + offset, value);
}
static int ns921x_gpio_chip_dir_input(struct gpio_chip *chip, unsigned offset)
{
return gpio_direction_irqinput_ns921x_unlocked(chip->base + offset);
}
static int ns921x_gpio_chip_dir_output(struct gpio_chip *chip,
unsigned offset, int value)
{
return gpio_direction_output_ns921x_unlocked(chip->base + offset,
value);
}
static struct gpio_chip ns921x_gpio_chip = {
.label = "ns921x-system-gpio",
.direction_input = ns921x_gpio_chip_dir_input,
.direction_output = ns921x_gpio_chip_dir_output,
.get = ns921x_gpio_chip_get,
.set = ns921x_gpio_chip_set,
.base = 0,
};
static struct gpio_chip ns921x_gpio_a_chip = {
.label = "ns921x-system-gpio",
.direction_input = ns921x_gpio_chip_dir_input,
.direction_output = ns921x_gpio_chip_dir_output,
.get = ns921x_gpio_chip_get,
.set = ns921x_gpio_chip_set,
.base = 104,
.ngpio = 4,
};
int __init ns921x_gpio_init(void)
{
int ret;
if (processor_is_ns9210())
ns921x_gpio_chip.ngpio = 50;
else if (processor_is_ns9215())
ns921x_gpio_chip.ngpio = 104;
else
return -EINVAL;
ret = gpiochip_add(&ns921x_gpio_chip);
if (ret)
return ret;
return gpiochip_add(&ns921x_gpio_a_chip);
}
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