/*
* Copyright ( C ) 2007 - 2009 , OpenWrt . org , Florian Fainelli < florian @ openwrt . org >
* GPIOLIB support for Alchemy chips .
*
* 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 SOFTWARE IS PROVIDED ` ` AS IS ' ' AND ANY EXPRESS OR IMPLIED
* WARRANTIES , INCLUDING , BUT NOT LIMITED TO , THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED . IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT , INDIRECT ,
* INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING , BUT
* NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS OF
* USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY , OR TORT
* ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE .
*
* 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 . ,
* 675 Mass Ave , Cambridge , MA 02139 , USA .
*
* Notes :
* au1000 SoC have only one GPIO block : GPIO1
* Au1100 , Au15x0 , Au12x0 have a second one : GPIO2
* Au1300 is totally different : 1 block with up to 128 GPIOs
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/gpio/driver.h>
#include <asm /mach-au1x00/gpio-au1000.h>
#include <asm /mach-au1x00/gpio-au1300.h>
static int gpio2_get(struct gpio_chip *chip, unsigned offset)
{
return !!alchemy_gpio2_get_value(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio2_set(struct gpio_chip *chip, unsigned offset, int value)
{
alchemy_gpio2_set_value(offset + ALCHEMY_GPIO2_BASE, value);
return 0 ;
}
static int gpio2_direction_input(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio2_direction_input(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio2_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
{
return alchemy_gpio2_direction_output(offset + ALCHEMY_GPIO2_BASE,
value);
}
static int gpio2_to_irq(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio2_to_irq(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio1_get(struct gpio_chip *chip, unsigned offset)
{
return !!alchemy_gpio1_get_value(offset + ALCHEMY_GPIO1_BASE);
}
static int gpio1_set(struct gpio_chip *chip,
unsigned offset, int value)
{
alchemy_gpio1_set_value(offset + ALCHEMY_GPIO1_BASE, value);
return 0 ;
}
static int gpio1_direction_input(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio1_direction_input(offset + ALCHEMY_GPIO1_BASE);
}
static int gpio1_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
return alchemy_gpio1_direction_output(offset + ALCHEMY_GPIO1_BASE,
value);
}
static int gpio1_to_irq(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio1_to_irq(offset + ALCHEMY_GPIO1_BASE);
}
struct gpio_chip alchemy_gpio_chip[] = {
[0 ] = {
.label = "alchemy-gpio1" ,
.direction_input = gpio1_direction_input,
.direction_output = gpio1_direction_output,
.get = gpio1_get,
.set = gpio1_set,
.to_irq = gpio1_to_irq,
.base = ALCHEMY_GPIO1_BASE,
.ngpio = ALCHEMY_GPIO1_NUM,
},
[1 ] = {
.label = "alchemy-gpio2" ,
.direction_input = gpio2_direction_input,
.direction_output = gpio2_direction_output,
.get = gpio2_get,
.set = gpio2_set,
.to_irq = gpio2_to_irq,
.base = ALCHEMY_GPIO2_BASE,
.ngpio = ALCHEMY_GPIO2_NUM,
},
};
static int alchemy_gpic_get(struct gpio_chip *chip, unsigned int off)
{
return !!au1300_gpio_get_value(off + AU1300_GPIO_BASE);
}
static int alchemy_gpic_set(struct gpio_chip *chip, unsigned int off, int v)
{
au1300_gpio_set_value(off + AU1300_GPIO_BASE, v);
return 0 ;
}
static int alchemy_gpic_dir_input(struct gpio_chip *chip, unsigned int off)
{
return au1300_gpio_direction_input(off + AU1300_GPIO_BASE);
}
static int alchemy_gpic_dir_output(struct gpio_chip *chip, unsigned int off,
int v)
{
return au1300_gpio_direction_output(off + AU1300_GPIO_BASE, v);
}
static int alchemy_gpic_gpio_to_irq(struct gpio_chip *chip, unsigned int off)
{
return au1300_gpio_to_irq(off + AU1300_GPIO_BASE);
}
static struct gpio_chip au1300_gpiochip = {
.label = "alchemy-gpic" ,
.direction_input = alchemy_gpic_dir_input,
.direction_output = alchemy_gpic_dir_output,
.get = alchemy_gpic_get,
.set = alchemy_gpic_set,
.to_irq = alchemy_gpic_gpio_to_irq,
.base = AU1300_GPIO_BASE,
.ngpio = AU1300_GPIO_NUM,
};
static int __init alchemy_gpiochip_init(void )
{
int ret = 0 ;
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
ret = gpiochip_add_data(&alchemy_gpio_chip[0 ], NULL);
break ;
case ALCHEMY_CPU_AU1500...ALCHEMY_CPU_AU1200:
ret = gpiochip_add_data(&alchemy_gpio_chip[0 ], NULL);
ret |= gpiochip_add_data(&alchemy_gpio_chip[1 ], NULL);
break ;
case ALCHEMY_CPU_AU1300:
ret = gpiochip_add_data(&au1300_gpiochip, NULL);
break ;
}
return ret;
}
arch_initcall(alchemy_gpiochip_init);
Messung V0.5 in Prozent C=100 H=97 G=98
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-30)
¤
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