I do not speak English well.
I live in South Korea.
I am GPIO through the the device driver you try to create a and is.
EXYNOS4_GPA1 (GPIO-10) by connecting the LED flashing every second that the driver is making.
If you make an error coming up I do not know how to solve.
gpio.c
Code:
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/sysfs.h>
#include <linux/input.h>
#include <linux/gpio.h>
#include <mach/gpio.h>
#include <mach/regs-gpio.h>
#include <plat/gpio-cfg.h>
#include <mach/gpio-exynos4.h>
#include<linux/cdev.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/hrtimer.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <mach/regs-pmu.h>
#define USER_SW EXYNOS4_GPA(1)
static int __init gpio_init(void)
{
int i;
printk(KERN_INFO "GPIO: Initializing!rnnnnn");
s3c_gpio_cfgpin(USER_SW, S3C_GPIO_INPUT); //GPA1[1] -> Input setting
s3c_gpio_setpull(USER_SW, S3C_GPIO_PULL_UP); //GPA[1] -> Pull up setting
gpio_set_value(USER_SW, 0); // init GPA1[1] -> 0 (OFF)
while(1){
gpio_set_value(USER_SW, 1);
sleep 1;
gpio_set_value(USER_SW, 0);
sleep 1;
}
return 0;
}
static void __exit gpio_exit(void)
{
printk(KERN_INFO "GPIO: exit");
}
module_init(gpio_init);
module_exit(gpio_exit);
MODULE_DESCRIPTION("Simple gpio module");
MODULE_AUTHOR("Anders Knive Lassen & Marius Lind Volstad");
MODULE_LICENSE("GPL");
Makefile
Code:
obj-m := gpio.o
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
default:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
test:
echo $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
rm -rf *.mod.c *.ko *.o *.symvers *.order
}
static void __exit gpio_exit(void)
{
printk(KERN_INFO "GPIO: exit");
}
module_init(gpio_init);
module_exit(gpio_exit);
MODULE_DESCRIPTION("Simple gpio module");
MODULE_AUTHOR("Anders Knive Lassen & Marius Lind Volstad");
MODULE_LICENSE("GPL");
ERROR
Code:
root@linaro-ubuntu-desktop:/study/led1# make
make -C /lib/modules/3.0.75/build SUBDIRS=/study/led1 modules
make[1]: Entering directory `/usr/src/linux-odroid-3.0.y'
CC [M] /study/led1/gpio.o
/study/led1/gpio.c: In function ‘gpio_init’:
/study/led1/gpio.c:64:2: error: implicit declaration of function ‘EXYNOS4_GPA’ [-Werror=implicit-function-declaration]
/study/led1/gpio.c:93:2: error: ‘sleep’ undeclared (first use in this function)
/study/led1/gpio.c:93:2: note: each undeclared identifier is reported only once for each function it appears in
/study/led1/gpio.c:93:8: error: expected ‘;’ before numeric constant
/study/led1/gpio.c:95:8: error: expected ‘;’ before numeric constant
cc1: some warnings being treated as errors
make[2]: *** [/study/led1/gpio.o] Error 1
make[1]: *** [_module_/study/led1] Error 2
make[1]: Leaving directory `/usr/src/linux-odroid-3.0.y'
make: *** [default] Error 2
