On 07/24/2012 01:19 AM, Arnd Bergmann wrote: > On Monday 23 July 2012, Stephen Warren wrote: >>> 3. A device with three channels, one of which has two alternatives: >> >> s/three/four/ s/one of which/both of which/ >> >> This binding doc seems reasonable to me. > > I asked a linguist about it who said that you can't have "both" together > with "four". She also mentioned that my text is rather confusing, so maybe > you also got it wrong. I'll try adding some explanation:
Oops, I guess I meant s/three/two/ :-) It seems that given there are two values for dma-names, there really are two channels; it's just that one channel is bi-directional, and the second has two alternatives. Still, I guess you could also view this as three separate channels instead. In which case, the text below makes sense. > 3. A device with three channels, one of which has two alternatives: > > dmas = <&dma0 1 4 /* first channel, data read */ > &dma0 2 6 /* second channel, data write */ > &dma1 1 0 /* third channel, error read */ > &dma2 1 0>; /* third channel, ernative error read */ > dma-names = "data", "data", "error", "error"; > > The first two channels are identified by having a unique direction > flag in combination with the "data" string. For the third channel, > there are two dma specifiers with identical flags (1) and strings > ("error"), so only one specifier may be used at a time. _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss