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[ARM] 5160/1: IOP3XX: gpio/gpiolib support

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This patch brings support for gpio/gpiolib framework to Intel IOP3xx
platforms.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Arnaud Patard
2008-07-08 23:07:48 +01:00
committed by Russell King
parent 543cf4cb3f
commit 63f385cd1f
5 changed files with 132 additions and 0 deletions
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43
arch/arm/plat-iop/gpio.c
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@@ -11,6 +11,10 @@
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <asm/hardware/iop3xx.h>
void gpio_line_config(int line, int direction)
@@ -46,3 +50,42 @@ void gpio_line_set(int line, int value)
local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_line_set);
static int iop3xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
gpio_line_config(gpio, GPIO_IN);
return 0;
}
static int iop3xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
{
gpio_line_set(gpio, level);
gpio_line_config(gpio, GPIO_OUT);
return 0;
}
static int iop3xx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
return gpio_line_get(gpio);
}
static void iop3xx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
{
gpio_line_set(gpio, value);
}
static struct gpio_chip iop3xx_chip = {
.label = "iop3xx",
.direction_input = iop3xx_gpio_direction_input,
.get = iop3xx_gpio_get_value,
.direction_output = iop3xx_gpio_direction_output,
.set = iop3xx_gpio_set_value,
.base = 0,
.ngpio = IOP3XX_N_GPIOS,
};
static int __init iop3xx_gpio_setup(void)
{
return gpiochip_add(&iop3xx_chip);
}
arch_initcall(iop3xx_gpio_setup);