android_kernel_xiaomi_sm8350/include/asm-arm/arch-pxa/gpio.h
Philipp Zabel 1c44f5f16f gpiolib support for the PXA architecture
This adds gpiolib support for the PXA architecture:
  - move all GPIO API functions from generic.c into gpio.c
  - convert the gpio_get/set_value macros into inline functions

This makes it easier to hook up GPIOs provided by external chips like
ASICs and CPLDs.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Minor ARM fixup from David Brownell folded into this ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:13 -08:00

66 lines
1.7 KiB
C

/*
* 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/irq.h>
#include <asm/hardware.h>
#include <asm-generic/gpio.h>
/* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
* Those cases currently cause holes in the GPIO number space.
*/
#define NR_BUILTIN_GPIO 128
static inline int gpio_get_value(unsigned gpio)
{
if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO))
return GPLR(gpio) & GPIO_bit(gpio);
else
return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO)) {
if (value)
GPSR(gpio) = GPIO_bit(gpio);
else
GPCR(gpio) = GPIO_bit(gpio);
} else {
__gpio_set_value(gpio, value);
}
}
#define gpio_cansleep __gpio_cansleep
#define gpio_to_irq(gpio) IRQ_GPIO(gpio)
#define irq_to_gpio(irq) IRQ_TO_GPIO(irq)
#endif