问题描述
probe()呼叫如何被调用?谁称呼它?根据我的理解，__init()注册driver，然后以某种方式调用probe()来register设备数据和irq等.它是如何发生的?
How does probe() call gets called? Who calls it? As per my understanding, __init() registers driver and then somehow probe() is called to register the device data and irq etc. How exactly it happens?
我正在使用触摸屏驱动程序，它的__init将自身注册到i2c driver.然后探测期望的i2c_clien t数据，该数据返回null.我想跟踪它的填充位置.
I am working on touchscreen driver and its __init registers itself to i2c driver. Then probe expect i2c_client data which returns null. I want to track where it gets filled.
推荐答案
长话短说:由于为该特定总线调用register_driver，因此调用了驱动程序的probe()函数.更准确地说，它是由该bus_type结构的probe()调用的.您的情况:i2c_bus_type.
Long story short: the probe() function of the driver is called as a result of calling the register_driver for that specific bus. More precisely, it's called by the probe() of that bus_type structure. In your case: i2c_bus_type.
这是您的I2C案例中的呼叫链:
Here's the call chain in your I2C case:
- i2c_register_driver
- driver_register
- bus_add_driver
- driver_attach
- __ driver_attach(针对您的设备)
- driver_probe_device
- really_probe
- i2c_device_probe(这是用于i2c驱动程序的dev-> bus-> probe)
- 您的probe_function
这篇关于谁调用驱动程序的probe()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！