conststructi2c_device_id *);int(*remove)(structi2c_client *);// 与枚举无关的驱动程序模型接口void(*shutdown)(structi2c_client *);int(*suspend)(structi2c_client *,pm_message_tmesg);int(*resume)(structi2c_client *);void(*alert)(structi2c_client *,unsignedintdata...
*/structi2c_adapter{structmodule*owner;unsignedintclass;/* classes to allow probing for */conststructi2c_algorithm*algo;/* the algorithm to access the bus */void*algo_data;/* data fields that are valid for all devices */structrt_mutexbus_lock;inttimeout;/* in jiffies */intretries;struct...
00000068 static int i2c_device_match(struct device *dev, struct device_driver *drv)00000069 {00000070 struct i2c_client *client = i2c_verify_client(dev);00000071 struct i2c_driver *driver;00000072 00000073 if (!client)00000074 return 0;00000075 00000076 /* Attempt an OF style match */00000077 ...
00000068staticinti2c_device_match(struct device*dev,struct device_driver*drv)00000069{00000070struct i2c_client*client=i2c_verify_client(dev);00000071struct i2c_driver*driver;0000007200000073if(!client)00000074return0;0000007500000076/* Attempt an OF style match */00000077if(of_driver_match_device(dev,d...
I2C总线驱动主要包括I2C适配器结构i2c_adapter和I2C适配器的algorithm数据结构。 通过I2C总线驱动的代码,可控制I2C适配器以主控方式产生开始位、停止位、读写周期,以及以从设备方式被读写、产生ACK等。 c、I2C设备驱动 I2C设备驱动是对I2C设备端的实现,设备一般挂接在受CPU控制的I2C适配器上,通过I2C适配器与CPU交换数...
.bus_num=0,//I2C总线,这里使用的是总线0 .bus_freq=100000,//I2C总线频率 }; 1. 2. 3. 4. 2.3 i2c平台设备注册 structplatform_devicenuc970_device_i2c0={ .name="nuc970-i2c0", .id=-1, .num_resources=ARRAY_SIZE(nuc970_i2c0_resource), ...
ko': -1 Device or resource busy $ dmesg [17549774.552000] Failed to register handler for irq channel 2 文件系统自动装载内核模块 mdev:这是一个 BusyBox 小程序,用于使用设备节点填充目录并根据需要创建新的节点。 有一个配置文件 /etc/mdev.conf,其中包含所有者和节点模块的规则。
dev: Linux设备模型中的device结构体,linux内核大量使用了面向对象思想,platform_device通过继承该结构体可复用它的相关代码,方便内核管理平台设备; num_resources: 记录资源的个数,当结构体成员resource存放的是数组时,需要记录resource数组的个数,内核提供了宏定义ARRAY_SIZE用于计算数组的个数; resource: 平台设备提供...
*/void(*alert)(struct i2c_client*,unsigned int data);/* a ioctl like command that can be used to perform specific functions * with the device. */int(*command)(struct i2c_client*client,unsigned int cmd,void*arg);struct device_driver driver;conststruct i2c_device_id*id_table;/* Device ...
第三层：实现i2c设备驱动中的i2c_driver接口，用具体的i2c device设备attch_adapter();detach_adapter()...