linux/drivers/gpio/gpio-sa1100.c
Linus Walleij 2428835fc6 ARM: 7049/1: mach-sa1100: move SA1100 GPIO driver to GPIO subsystem
As per example from the other ARM boards, push the SA100
GPIO driver down to the GPIO subsystem so it can be consolidated.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-08-22 09:13:44 +01:00

64 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/gpio.h>
#include <linux/init.h>
#include <linux/module.h>
#include <mach/hardware.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);
}