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: bfa274e2436fc7ef72ef51c878083647f1cfd429 authored by Linus Torvalds on 24 February 2008, 21:25:54 UTC
Linux 2.6.25-rc3
Linux 2.6.25-rc3
Tip revision: bfa274e
gpio.c
/*
* Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
* RDC321x architecture specific GPIO support
*
* 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/autoconf.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <asm/mach-rdc321x/rdc321x_defs.h>
static inline int rdc_gpio_is_valid(unsigned gpio)
{
return (gpio <= RDC_MAX_GPIO);
}
static unsigned int rdc_gpio_read(unsigned gpio)
{
unsigned int val;
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x84:0x48));
outl(val, RDC3210_CFGREG_ADDR);
udelay(10);
val = inl(RDC3210_CFGREG_DATA);
val |= (0x1 << (gpio & 0x1F));
outl(val, RDC3210_CFGREG_DATA);
udelay(10);
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x88:0x4C));
outl(val, RDC3210_CFGREG_ADDR);
udelay(10);
val = inl(RDC3210_CFGREG_DATA);
return val;
}
static void rdc_gpio_write(unsigned int val)
{
if (val) {
outl(val, RDC3210_CFGREG_DATA);
udelay(10);
}
}
int rdc_gpio_get_value(unsigned gpio)
{
if (rdc_gpio_is_valid(gpio))
return (int)rdc_gpio_read(gpio);
else
return -EINVAL;
}
EXPORT_SYMBOL(rdc_gpio_get_value);
void rdc_gpio_set_value(unsigned gpio, int value)
{
unsigned int val;
if (!rdc_gpio_is_valid(gpio))
return;
val = rdc_gpio_read(gpio);
if (value)
val &= ~(0x1 << (gpio & 0x1F));
else
val |= (0x1 << (gpio & 0x1F));
rdc_gpio_write(val);
}
EXPORT_SYMBOL(rdc_gpio_set_value);
int rdc_gpio_direction_input(unsigned gpio)
{
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_input);
int rdc_gpio_direction_output(unsigned gpio, int value)
{
return 0;
}
EXPORT_SYMBOL(rdc_gpio_direction_output);