驱动开发11-2 编写SPI驱动程序-点亮数码管

驱动程序

#include <linux/init.h>
#include <linux/module.h>
#include <linux/spi/spi.h>int m74hc595_probe(struct spi_device *spi)
{printk("%s:%d\n",__FILE__,__LINE__);char buf[]={0XF,0X6D};spi_write(spi,buf,sizeof(buf));return 0;
}
int m74hc595_remove(struct spi_device *spi)
{printk("%s:%d\n",__FILE__,__LINE__);return 0;
}
//设备树匹配表
struct of_device_id of_table[] = {{.compatible="hqyj,m74hc595"},{},
};
//定义SPI对象并初始化
struct spi_driver m74hc575 = {.probe = m74hc595_probe,.remove = m74hc595_remove,.driver = {.name = "m74hc595",.of_match_table = of_table,},
};
module_spi_driver(m74hc575);
MODULE_LICENSE("GPL");

效果演示