On 12/08/2015 11:51 AM, Arnd Bergmann wrote: > On Tuesday 08 December 2015 09:42:26 Peter Ujfalusi wrote: >> On 12/04/2015 11:51 PM, Tony Lindgren wrote: >>>> >>>> Please just drop the /bits/ 16 and use normal cells. >>> >>> Yeah agreed, makes things less confusing for sure >> >> 4.4 will be the first kernel where we will have the new eDMA bindings. I have >> chosen to use 16bit array for specifying the channels used for memcpy >> (ti,edma-memcpy-channels) and for the reserving paRAM slots >> (ti,edma-reserved-slot-ranges). As of now we have maximum of 64 channels and >> 512 paRAM slots. 16bit is more than enough to store this information and it >> even gives us enough room if ever in the future these numbers are going to >> increase (which they are not). >> >> But in order to change them to 32bit the driver needs to be changed as well. >> Currently we do not have drivers (in 4.4) using the new bindings, 4.4 is not >> yet out, so it might be possible to change the binding document and the driver >> to use 32bit arrays. The driver internally uses 16bit type for these which I'm >> not going to change, but the code parsing the DT needs to be adjusted for the >> new data type. >> >> If Vinod is willing to take update for the DT binding of eDMA for 4.4-rc, I >> can cook up the patch(es) to do so. > > I hadn't realized that it was already in 4.4-rc. The change should be trivial > enough though, so I'd still do it. If Vinod would rather not change it now, > it's not overly important though. But this change must be done before we have actual users of these properties, which is the am33xx, am437x and the da850 conversion series I have sent recently. We might want to have this changed for 4.4 since it is going to be an LTS release... -- Péter -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
