DT simplify kernel development for arm processor as they tend to vary on features, its easier to make a general formula than custom driver for each processor. I think this link will answer your quetions https://github.com/jadonk/validation-scripts/tree/master/test-capemgr
-Pedro <https://github.com/jadonk/validation-scripts/tree/master/test-capemgr> On Sun, Oct 6, 2013 at 12:07 AM, Amalinda J' Gamage < [email protected]> wrote: > I am a new user to beaglebone and I have a couple of basic questions. > I want to know what is meant by DT or Device tree overlay and why it is > required for BB/ ARM335X. Is it not required for other main processors like > Intel because they are " defined" in the Linux kernel? and TI ARM3358 > processor is not " defined" . What support is available for other > "popular" processors and is not available for TI ARM 3358 in Linux Kernal? > Or was there support BEFORE and was it taken BACK? > I mean is this the reason that we make a device tree and pass it to the > system ? I may have mentioned incorrect statements please feel free to > correct me. > > secondly, I know that with no Device tree stuff, it is possible to lighten > up an LED connected to the BB and BBB using the terminal. So if the > definitions are not there in the Linux kernel, how come this method works? > I mean how can one export a GPIO and lighten the LED connected if that is > not found in the kernel? If so, then is a DT necessary at all? > > A confused. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
