mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
7b6d864b48
Preparing to move the parsing of reboot= to generic kernel code forces the change in reboot_mode handling to use the enum. [akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c] Signed-off-by: Robin Holt <holt@sgi.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Russ Anderson <rja@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
|
|
* arch/arm/plat-iop/gpio.c
|
|
* GPIO handling for Intel IOP3xx processors.
|
|
*
|
|
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/export.h>
|
|
#include <asm/hardware/iop3xx.h>
|
|
#include <mach/gpio.h>
|
|
|
|
void gpio_line_config(int line, int direction)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
if (direction == GPIO_IN) {
|
|
*IOP3XX_GPOE |= 1 << line;
|
|
} else if (direction == GPIO_OUT) {
|
|
*IOP3XX_GPOE &= ~(1 << line);
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_line_config);
|
|
|
|
int gpio_line_get(int line)
|
|
{
|
|
return !!(*IOP3XX_GPID & (1 << line));
|
|
}
|
|
EXPORT_SYMBOL(gpio_line_get);
|
|
|
|
void gpio_line_set(int line, int value)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
if (value == GPIO_LOW) {
|
|
*IOP3XX_GPOD &= ~(1 << line);
|
|
} else if (value == GPIO_HIGH) {
|
|
*IOP3XX_GPOD |= 1 << line;
|
|
}
|
|
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);
|