On Thu, Mar 16, 2017 at 09:59:04PM +0100, Geert Uytterhoeven wrote: > Hi Rob, > > On Thu, Mar 16, 2017 at 9:56 PM, Rob Herring <robh@xxxxxxxxxx> wrote: > > On Thu, Mar 16, 2017 at 09:13:16AM +0100, Geert Uytterhoeven wrote: > >> On Wed, Mar 15, 2017 at 6:01 PM, Rob Herring <robh@xxxxxxxxxx> wrote: > >> > On Mon, Mar 06, 2017 at 05:25:56PM +0100, Geert Uytterhoeven wrote: > >> >> Document the optional properties for describing module resets, to > >> >> support resetting display channels and LVDS encoders on R-Car Gen2 and > >> >> Gen3. > >> >> > >> >> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > >> >> --- > >> >> See "[v2,1/4] dt-bindings: clock: renesas: cpg-mssr: Document reset control > >> >> support" (https://patchwork.kernel.org/patch/9536627/) for the format of > >> >> a reset specifier in the Renesas CPG/MSSR case. > >> >> > >> >> E.g. "resets = <&cpg 310>;" > >> >> > >> >> v2: > >> >> - s/phandles/phandle/. > >> >> --- > >> >> Documentation/devicetree/bindings/display/renesas,du.txt | 10 ++++++++++ > >> >> 1 file changed, 10 insertions(+) > >> >> > >> >> diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt > >> >> index 1a02f099a0ff0a3a..3db418c827193e82 100644 > >> >> --- a/Documentation/devicetree/bindings/display/renesas,du.txt > >> >> +++ b/Documentation/devicetree/bindings/display/renesas,du.txt > >> >> @@ -36,6 +36,16 @@ Required Properties: > >> >> When supplied they must be named "dclkin.x" with "x" being the input > >> >> clock numerical index. > >> >> > >> >> +Optional properties: > >> >> + - resets: A list of phandle + reset-specifier pairs, one for each entry in > >> >> + the reset-names property. > >> >> + - reset-names: Names of the resets. This property is model-dependent. > >> >> + - R8A779[0123456] use one reset for a group of one or more successive > >> >> + channels, and one reset per LVDS encoder (if available). The resets > >> >> + must be named "du.x" with "x" being the numerical index of the lowest > >> >> + channel in the group. The LVDS resets must be named "lvds.x" with "x" > >> >> + being the LVDS encoder numerical index. > >> > > >> > LVDS is not a separate block? > >> > >> Well... from a hardware point of view, the LVDS encoders and DU channels > >> are all separate blocks (they have separate reg blocks, clocks, and resets). > >> But due to the dependencies between the blocks, they're modeled in DT as > >> a single device, with multiple reg, clocks, and resets properties. > > > > Dependencies being DRM requirement of wanting a single device with > > sub-devices or some h/w dependencies? The former shouldn't define your > > binding. > > Hardware dependencies. Laurent can tell you more about them (when he'll > be back). Okay, Acked-by: Rob Herring <robh@xxxxxxxxxx> Rob
