On Wed, Dec 28, 2016 at 07:30:36PM +0100, Pavel Machek wrote: > From: Sakari Ailus <sakari.ailus@xxxxxx> > > In the vast majority of cases the bus type is known to the driver(s) > since a receiver or transmitter can only support a single one. There > are cases however where different options are possible. What cases specifically? > Document the CSI1/CCP2 properties strobe_clk_inv and strobe_clock > properties. The former tells whether the strobe/clock signal is > inverted, while the latter signifies the clock or strobe mode. > > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx> > Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx> > Signed-off-by: Pavel Machek <pavel@xxxxxx> > > diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt > index 9cd2a36..f0523f7 100644 > --- a/Documentation/devicetree/bindings/media/video-interfaces.txt > +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt > @@ -76,6 +76,10 @@ Optional endpoint properties > mode horizontal and vertical synchronization signals are provided to the > slave device (data source) by the master device (data sink). In the master > mode the data source device is also the source of the synchronization signals. > +- bus-type: data bus type. Possible values are: > + 0 - CSI2 As in MIPI CSI2? > + 1 - parallel / Bt656 > + 2 - CCP2 > - bus-width: number of data lines actively used, valid for the parallel busses. > - data-shift: on the parallel data busses, if bus-width is used to specify the > number of data lines, data-shift can be used to specify which data lines are > @@ -110,9 +114,10 @@ Optional endpoint properties > lane and followed by the data lanes in the same order as in data-lanes. > Valid values are 0 (normal) and 1 (inverted). The length of the array > should be the combined length of data-lanes and clock-lanes properties. > - If the lane-polarities property is omitted, the value must be interpreted > - as 0 (normal). This property is valid for serial busses only. Why is this removed? > - > +- clock-inv: Clock or strobe signal inversion. > + Possible values: 0 -- not inverted; 1 -- inverted "invert" assumes I know what is normal and I do not. Define what is "normal" and name the property the opposite of that. If normal is data shifted on clock rising edge, then call the the property "clock-shift-falling-edge" for example.. > +- strobe: Whether the clock signal is used as clock or strobe. Used > + with CCP2, for instance. > > Example > ------- > > > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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
