Commit 63f385cd authored by Arnaud Patard's avatar Arnaud Patard Committed by Russell King

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

This patch brings support for gpio/gpiolib framework to Intel IOP3xx
platforms.
Signed-off-by: default avatarArnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 543cf4cb
......@@ -299,6 +299,8 @@ config ARCH_IOP32X
depends on MMU
select PLAT_IOP
select PCI
select GENERIC_GPIO
select HAVE_GPIO_LIB
help
Support for Intel's 80219 and IOP32X (XScale) family of
processors.
......@@ -308,6 +310,8 @@ config ARCH_IOP33X
depends on MMU
select PLAT_IOP
select PCI
select GENERIC_GPIO
select HAVE_GPIO_LIB
help
Support for Intel's IOP33X (XScale) family of processors.
......
......@@ -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);
#ifndef __ASM_ARCH_IOP32X_GPIO_H
#define __ASM_ARCH_IOP32X_GPIO_H
#include <asm/hardware/iop3xx-gpio.h>
#endif
#ifndef __ASM_ARCH_IOP33X_GPIO_H
#define __ASM_ARCH_IOP33X_GPIO_H
#include <asm/hardware/iop3xx-gpio.h>
#endif
/*
* linux/include/asm-arm/hardware/iop3xx-gpio.h
*
* IOP3xx GPIO wrappers
*
* Copyright (c) 2008 Arnaud Patard <arnaud.patard@rtp-net.org>
* Based on IXP4XX gpio.h file
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __ASM_ARM_HARDWARE_IOP3XX_GPIO_H
#define __ASM_ARM_HARDWARE_IOP3XX_GPIO_H
#include <asm/hardware.h>
#include <asm-generic/gpio.h>
#define IOP3XX_N_GPIOS 8
static inline int gpio_get_value(unsigned gpio)
{
if (gpio > IOP3XX_N_GPIOS)
return __gpio_get_value(gpio);
return gpio_line_get(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
if (gpio > IOP3XX_N_GPIOS) {
__gpio_set_value(gpio, value);
return;
}
gpio_line_set(gpio, value);
}
static inline int gpio_cansleep(unsigned gpio)
{
if (gpio < IOP3XX_N_GPIOS)
return 0;
else
return __gpio_cansleep(gpio);
}
/*
* The GPIOs are not generating any interrupt
* Note : manuals are not clear about this
*/
static inline int gpio_to_irq(int gpio)
{
return -EINVAL;
}
static inline int irq_to_gpio(int gpio)
{
return -EINVAL;
}
#endif
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