On Wed, Sep 22, 2010 at 11:49:25AM -0700, Ardelean, Andrei wrote: > I am using MALTA and my goal is to port MIPS Linux on a new platform. > Which driver (source code) is used for tty0 (console)? I see the support > for "early console" but I think that this is not the real Linux driver > used after boot stage. Correct. Early console uses an extremly simple driver which in general is separate from the full blown driver that takes over later. > More general, how to find which code source is used for an embedded > driver (part of the Kernel at compiling time) for each h/w resource. > MIPS Linux distribution comes with a lot of drivers but I have > difficulties to figure out which one is used for MALTA. Is it a files > where all those are registered? For any modern style driver that information is available through sysfs. For example on this laptop here: # cd /sys/devices/platform/serial8250 # ls -l total 0 lrwxrwxrwx. 1 root root 0 Sep 24 12:20 driver -> ../../../bus/platform/drivers/serial8250 -r--r--r--. 1 root root 4096 Sep 24 12:20 modalias drwxr-xr-x. 2 root root 0 Sep 24 12:20 power lrwxrwxrwx. 1 root root 0 Sep 24 12:20 subsystem -> ../../../bus/platform drwxr-xr-x. 5 root root 0 Sep 24 12:20 tty -rw-r--r--. 1 root root 4096 Sep 24 12:20 uevent # So you see the driver being used is the 8250 driver. Similar you can find the driver for a PCI device in /sys/devices/pci* etc. Ralf
