一、重要的 API: //初始化与注册: int spi_register_driver(struct spi_driver *sdrv); // 注册SPI驱动 void spi_unregister_driver(struct spi_driver *sdrv); // 注销驱动 //数据传输: int spi_sync(struct spi_device *spi, struct spi_message *message); // 同步传输,会阻塞,返回值: 0-成功传输, 负数-失败码:传输失败 int spi_async(struct spi_device *spi, struct ...