[ARM] 4275/1: generic gpio layer for ixp4xx (25735d10) · Commits · 戴 / test

arch/arm/mach-ixp4xx/common.c

+23 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,29 @@ static signed char irq2gpio[32] = {
		7, 8, 9, 10, 11, 12, -1, -1,
		};

		int gpio_to_irq(int gpio)
		{
		int irq;

		for (irq = 0; irq < 32; irq++) {
		if (irq2gpio[irq] == gpio)
		return irq;
		}
		return -EINVAL;
		}
		EXPORT_SYMBOL(gpio_to_irq);

		int irq_to_gpio(int irq)
		{
		int gpio = (irq < 32) ? irq2gpio[irq] : -EINVAL;

		if (gpio == -1)
		return -EINVAL;

		return gpio;
		}
		EXPORT_SYMBOL(irq_to_gpio);

		static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type)
		{
		int line = irq2gpio[irq];

include/asm-arm/arch-ixp4xx/gpio.h

0 → 100644

+73 −0

Original line number	Diff line number	Diff line
		/*
		* linux/include/asm-arm/arch-ixp4xx/gpio.h
		*
		* IXP4XX GPIO wrappers for arch-neutral GPIO calls
		*
		* Written by Milan Svoboda <msvoboda@ra.rockwell.com>
		* Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
		*
		* 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_ARCH_IXP4XX_GPIO_H
		#define __ASM_ARCH_IXP4XX_GPIO_H

		#include <asm/hardware.h>

		static inline int gpio_request(unsigned gpio, const char *label)
		{
		return 0;
		}

		static inline void gpio_free(unsigned gpio)
		{
		return;
		}

		static inline int gpio_direction_input(unsigned gpio)
		{
		gpio_line_config(gpio, IXP4XX_GPIO_IN);
		return 0;
		}

		static inline int gpio_direction_output(unsigned gpio, int level)
		{
		gpio_line_set(gpio, level);
		gpio_line_config(gpio, IXP4XX_GPIO_OUT);
		return 0;
		}

		static inline int gpio_get_value(unsigned gpio)
		{
		int value;

		gpio_line_get(gpio, &value);

		return value;
		}

		static inline void gpio_set_value(unsigned gpio, int value)
		{
		gpio_line_set(gpio, value);
		}

		#include <asm-generic/gpio.h> /* cansleep wrappers */

		extern int gpio_to_irq(int gpio);
		extern int irq_to_gpio(int gpio);

		#endif

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