On Thu, 2013-09-12 at 18:15 +0100, Mark Rutland wrote: > On Tue, Sep 03, 2013 at 10:01:50AM +0100, Hongbo Zhang wrote: > > On 09/02/2013 11:58 PM, Mark Rutland wrote: > > > May some channels be unusable for some reason, or will all eight > > > channels be wired on any given Elo3 DMA? > > Sorry, not get your point clearly, maybe you are clear now because of my > > previous explanations. > > I assume that on any El03 DMA, there won't be a case where you can't > describe the channel at 0x80, for instance. It will always be present > (but it might not be wired up to anything any therefore be useful)? > > This was related to my concerns about the status register description -- > if the channels at 0x0,0x80,0x100,0x180 weren't wired, what would get > described in the dt? I guess that would never actually happen because > all 8 channels must always be present in the Elo3 IP block. If a channel is not usable for whatever reason (other than that "used for a different fixed purpose and thus described with a different compatible" thing that was mentioned earlier in these threads), wouldn't it just have status = "disabled" or similar, or be absent? -Scott -- 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
