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

[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

arch/arm/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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.

arch/arm/plat-iop/gpio.c

+43 −0
Original line number Diff line number Diff line
@@ -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);

include/asm-arm/arch-iop32x/gpio.h

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#ifndef __ASM_ARCH_IOP32X_GPIO_H

#define __ASM_ARCH_IOP32X_GPIO_H



#include <asm/hardware/iop3xx-gpio.h>



#endif

include/asm-arm/arch-iop33x/gpio.h

0 → 100644
+6 −0
Original line number Diff line number Diff line 
#ifndef __ASM_ARCH_IOP33X_GPIO_H

#define __ASM_ARCH_IOP33X_GPIO_H



#include <asm/hardware/iop3xx-gpio.h>



#endif

include/asm-arm/hardware/iop3xx-gpio.h

0 → 100644
+73 −0
Original line number Diff line number Diff line 
/*

 * 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