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[PATCH] PXA GPIO wrappers

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Arch-neutral GPIO calls for PXA.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Philipp Zabel 2007-02-12 00:53:14 -08:00 committed by Linus Torvalds
parent a31c4eea21
commit 8a898f1c36
1 changed files with 72 additions and 0 deletions
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72
include/asm-arm/arch-pxa/gpio.h Normal file
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/*
* linux/include/asm-arm/arch-pxa/gpio.h
*
* PXA GPIO wrappers for arch-neutral GPIO calls
*
* Written 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_PXA_GPIO_H
#define __ASM_ARCH_PXA_GPIO_H
#include <asm/arch/pxa-regs.h>
#include <asm/arch/irqs.h>
#include <asm/arch/hardware.h>
#include <asm/errno.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)
{
if (gpio > PXA_LAST_GPIO)
return -EINVAL;
pxa_gpio_mode(gpio | GPIO_IN);
}
static inline int gpio_direction_output(unsigned gpio)
{
if (gpio > PXA_LAST_GPIO)
return -EINVAL;
pxa_gpio_mode(gpio | GPIO_OUT);
}
/* REVISIT these macros are correct, but suffer code explosion
* for non-constant parameters. Provide out-line versions too.
*/
#define gpio_get_value(gpio) \
(GPLR(gpio) & GPIO_bit(gpio))
#define gpio_set_value(gpio,value) \
((value) ? (GPSR(gpio) = GPIO_bit(gpio)):(GPCR(gpio) = GPIO_bit(gpio)))
#include <asm-generic/gpio.h> /* cansleep wrappers */
#define gpio_to_irq(gpio) IRQ_GPIO(gpio)
#define irq_to_gpio(irq) IRQ_TO_GPIO(irq)
#endif