09_gpiochipLinux内核模块

本文主要是介绍09_gpiochipLinux内核模块，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

01_basicLinux内核模块-CSDN博客文章浏览阅读318次，点赞3次，收藏3次。环境ID=ubuntuMakefilemodules:clean:basic.creturn 0;运行效果。https://blog.csdn.net/m0_37132481/article/details/136157384my_gpiochip.c

#include <linux/kernel.h>
#include <linux/module.h>#include <linux/gpio/driver.h>#define TAG "HELLO# "static int my_gpiochip_gpio_request(struct gpio_chip *chip, unsigned int offset)
{printk(TAG "%s called\n", __func__);return 0;
}
static int my_gpiochip_gpio_direction_in(struct gpio_chip *chip, unsigned int offset)
{printk(TAG "%s called\n", __func__);return 0;
}
static int my_gpiochip_gpio_get(struct gpio_chip *chip, unsigned int offset)
{printk(TAG "%s called\n", __func__);return 0;
}
static int my_gpiochip_gpio_direction_out(struct gpio_chip *chip, unsigned offset, int value)
{printk(TAG "%s called\n", __func__);return 0;
}
static void my_gpiochip_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{printk(TAG "%s called\n", __func__);
}static struct gpio_chip my_gpiochip_gpio_chip = {.label                  = "my_gpiochip",.owner                  = THIS_MODULE,.request                = my_gpiochip_gpio_request,.direction_input        = my_gpiochip_gpio_direction_in,.get                    = my_gpiochip_gpio_get,.direction_output       = my_gpiochip_gpio_direction_out,.set                    = my_gpiochip_gpio_set,.can_sleep              = 1,.ngpio                  = 100,.base                   = -1,
};static int my_gpiochip_init(void)
{printk(TAG "%s called\n", __func__);gpiochip_add(&my_gpiochip_gpio_chip);return 0;
}
static void my_gpiochip_exit(void)
{gpiochip_remove(&my_gpiochip_gpio_chip);printk(TAG "%s called\n", __func__);
}module_init(my_gpiochip_init);
module_exit(my_gpiochip_exit);
MODULE_LICENSE("GPL");

效果