On Tue, 21 Apr 2009, Uri Shkolnik wrote: > --- On Tue, 4/21/09, Trent Piepho <xyzzy@xxxxxxxxxxxxx> wrote: > > From: Trent Piepho <xyzzy@xxxxxxxxxxxxx> > > Subject: Re: [PATCH] [0904_14] Siano: assemble all components to one kernel module > > To: "Uri Shkolnik" <urishk@xxxxxxxxx> > > Cc: "Mauro Carvalho Chehab" <mchehab@xxxxxxxxxxxxx>, "LinuxML" <linux-media@xxxxxxxxxxxxxxx> > > Date: Tuesday, April 21, 2009, 6:17 AM > > On Mon, 20 Apr 2009, Uri Shkolnik > > wrote: > > > > > > "better to have the BUS configurable, e. g. just > > because you have USB interface, it doesn't mean that you > > want siano for USB, instead of using SDIO." > > > > > > Since the module is using dynamic registration, I > > don't find it a problem. > > > When the system has both USB and SDIO buses, both USB > > and SDIO interface driver will be compiled and linked to the > > module. When a Siano based device (or multiple Siano > > devices) will be connected, they will be register internally > > in the core and activated. Any combination is allow > > (multiple SDIO, multiple USB and any mix). > > > > This is not the way linux drivers normally work. > > Usually there are > > multiple modules so that only the ones that need to be > > loaded are loaded. > > It sounds like you are designing this to be custom compiled > > for each > > system, but that's not usually they way things work. > > I think I didn't express myself clearly. > > Lets say that someone build a kernel X. > This kernel has (from all buses) only USB. The Siano module will build with USB interface driver at this system. > > If the system includes SDIO and OMAP SPI/SPP, the module build will discard the USB interface driver, but the SDIO and the OMAP SPI will be built. Can you name another driver that works this way? It is considered better to build a new module for a different interface. That way one can decide at run time if the interface is needed or not and only load the module if needed. If everything is built into one module then one must decide at compile time what interfaces to support. But it is often the case that kernels are compiled on different systems than run them. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
