On 13:48 Fri 27 Apr , Shawn Guo wrote: > On Thu, Apr 26, 2012 at 05:15:36PM +0200, Jean-Christophe PLAGNIOL-VILLARD > wrote: > > We have on Imx mxc at91 and other SoC controler hich you configure per pin > > > > which means one pin have multiple function and the same function is on > > multiple pins > > > > so the groups are just a list of possible pins > > > > Instead of re-inventing bindings we do need to come with a common binding > > whre > > it's possible > > > > So instead I proppose (send in the v2) to use common way to describe the > > group > > > Let's see how many nodes we will have in device tree. For imx6q > example, there are 332 pins and each pin has up to 8 function selects. > We will end up with having 332 x 8 = 2656 sub nodes under node > "functions". Device tree simply cannot afford such a bloating. device tree can offord it
except you are going to have hundereds of duplicated pinctrl configuration as different board will have different mux which is impossbile to maintain either and I do not expect we add all the configuration possible but just the common one Best Regards, J. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
