Linux驱动spi设备代码
时间: 2023-08-14 17:33:06 浏览: 63
以下是一个简单的Linux驱动SPI设备代码示例:
```c
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spi/spi.h>
static struct spi_device *spi_dev;
static int spi_dev_probe(struct spi_device *spi)
{
int ret;
printk(KERN_INFO "SPI device is probed!\n");
spi_dev = spi;
/* TODO: Add device initialization code here */
return 0;
}
static int spi_dev_remove(struct spi_device *spi)
{
printk(KERN_INFO "SPI device is removed!\n");
/* TODO: Add device cleanup code here */
return 0;
}
static struct spi_driver spi_dev_driver = {
.driver = {
.name = "spi-dev",
.owner = THIS_MODULE,
},
.probe = spi_dev_probe,
.remove = spi_dev_remove,
};
static int __init spi_dev_init(void)
{
int ret;
printk(KERN_INFO "SPI device driver is loaded!\n");
ret = spi_register_driver(&spi_dev_driver);
if (ret < 0) {
printk(KERN_ERR "Failed to register SPI device driver: %d\n", ret);
return ret;
}
return 0;
}
static void __exit spi_dev_exit(void)
{
spi_unregister_driver(&spi_dev_driver);
printk(KERN_INFO "SPI device driver is unloaded!\n");
}
module_init(spi_dev_init);
module_exit(spi_dev_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("Linux driver for SPI device");
```
这段代码实现了一个简单的Linux驱动SPI设备,包含了设备的初始化、注册、注销等操作。其中,`spi_dev_probe`函数用于设备的初始化和注册,`spi_dev_remove`函数用于设备的注销和清理。通过调用`spi_register_driver`和`spi_unregister_driver`函数,可以将SPI设备驱动注册到系统中。