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Ftrace:snoop i2c bus transactions – technolinchpinFtrace:snoop i2c bus transactions.The data transferred by the system over the i2c bus (and smbus) can be snooped using the kernel’s FTRACE facility. To use this, the following kernel options need to be enabled:echo 1 >/sys/kernel/debug/tracing/events/i2c/enable.ca... 阅56 转0 评0 公众公开 18-03-28 02:34 |
No debug logging * takes place. adap->algo->master_xfer existence isn''''''''t checked. */int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num){ unsigned long orig_jiffies;if (adapter->algo->smbus_xfer) { i2c_lock_bus(adapter, I2C_LOCK_SEGMENT);try++) ... 阅184 转0 评0 公众公开 18-03-28 01:56 |
/*下面我们要分析pca9541_id,pca9541_remove,pca9541_probe*/1)pca9541_idstatic const struct i2c_device_id pca9541_id[] = { {"pca9541", 0}, {}};MODULE_DEVICE_TABLE(i2c, pca9541_id);这里要分析一下i2c_device_id这个结构体。reg = pca9541_reg_read(client, PCA9541_CONTROL);//接下来我们分析pca9541_remove().它的作... 阅891 转8 评0 公众公开 15-05-04 09:24 |
该i2c从设备所依附的i2c主设备 struct i2c_adapter *adapter该i2c从设备的驱动程序struct i2c_driver *driver作为i2c从设备所通用的成员变量,比如addr, name等该i2c从设备驱动所特有的数据，依附于dev->driver_data下。struct i2c_client *i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info){static int bma220_... 阅82 转4 评0 公众公开 13-10-05 02:37 |
