https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 4a10c2ac2f368583138b774ca41fac4207911983 authored by Linus Torvalds on 23 September 2013, 22:41:09 UTC
Linux 3.12-rc2
Linux 3.12-rc2
Tip revision: 4a10c2a
gpio.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);