On Wed, Apr 18, 2012 at 4:37 PM, Philipp Ittershagen <p.ittershagen@xxxxxxxxxxxxxx> wrote: > On Wed, Apr 18, 2012 at 04:32:12PM +0530, anish singh wrote: >> On Wed, Apr 18, 2012 at 4:18 PM, Philipp Ittershagen >> <p.ittershagen@xxxxxxxxxxxxxx> wrote: >> > On Wed, Apr 18, 2012 at 05:16:01PM +0800, Li Haifeng wrote: >> >> I make a driver module and built in the kernel. There are three devices use >> >> the same driver on the hardware platform. To use each device, the probe >> >> function of the driver module should be probed. So, the driver module is >> >> registered in the kernel. >> >> >> >> My question is, how times should the probe function of the driver be called >> >> and create nodes in devfs to corresponding with the three devices? >> > >> > It depends on what your architecture supports. If you have support for device >> > tree, your entry in the device tree will make the subsystem call your probe >> > function for each device it finds. You can then check the `compatible` entry >> > of the device node and your driver is then able to register itself to the >> > kernel subsystem. >> Without device tree what would be your answer as i guess device >> tree has come recently in picture but not sure. > > Let me rephrase your question and see if I understand it correctly. You have a > probe function which already gets called for each device in your platform and > you want to know how to make each device accessible in userspace (using i.e. > devfs nodes) ? I think he wants to know how will he differentiate different devices as probe of the driver will be called three times for all the devices.Right? > > Greetings, > > Philipp _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
