25735d10ba
This patch brings generic gpio layer support to ixp4xx. It creates
functions needed for gpio->irq and irq->gpio translation.
It expects and initial value to be passed to
gpio_direction_output() which has been introduced by
commit 28735a7253 in Linus git tree.
Generic gpio layer is going to be used by pxa2xx_udc driver.
Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* linux/include/asm-arm/arch-ixp4xx/gpio.h
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*
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* IXP4XX GPIO wrappers for arch-neutral GPIO calls
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*
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* Written by Milan Svoboda <msvoboda@ra.rockwell.com>
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* Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __ASM_ARCH_IXP4XX_GPIO_H
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#define __ASM_ARCH_IXP4XX_GPIO_H
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#include <asm/hardware.h>
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static inline int gpio_request(unsigned gpio, const char *label)
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{
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return 0;
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}
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static inline void gpio_free(unsigned gpio)
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{
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return;
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}
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static inline int gpio_direction_input(unsigned gpio)
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{
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gpio_line_config(gpio, IXP4XX_GPIO_IN);
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return 0;
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}
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static inline int gpio_direction_output(unsigned gpio, int level)
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{
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gpio_line_set(gpio, level);
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gpio_line_config(gpio, IXP4XX_GPIO_OUT);
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return 0;
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}
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static inline int gpio_get_value(unsigned gpio)
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{
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int value;
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gpio_line_get(gpio, &value);
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return value;
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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gpio_line_set(gpio, value);
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}
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#include <asm-generic/gpio.h> /* cansleep wrappers */
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extern int gpio_to_irq(int gpio);
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extern int irq_to_gpio(int gpio);
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#endif
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