linux/drivers/gpio/gpio-sa1100.c
Rob Herring f314f33be7 ARM: 7342/2: sa1100: prepare for sparse irq conversion
In preparation to convert SA1100 to sparse irq, set .nr_irqs for each machine
and explicitly include mach/irqs.h as needed.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-03-25 23:57:20 +01:00

70 lines
1.6 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>
#include <mach/irqs.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 int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
{
return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset);
}
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,
.to_irq = sa1100_to_irq,
.base = 0,
.ngpio = GPIO_MAX + 1,
};
void __init sa1100_init_gpio(void)
{
gpiochip_add(&sa1100_gpio_chip);
}