On Wed, May 04, 2016 at 11:34:39PM +0530, Archit Taneja wrote: > > > On 5/4/2016 7:14 PM, Rob Herring wrote: > >On Tue, May 03, 2016 at 04:28:01PM +0530, Archit Taneja wrote: > >>The PLL in the DSI PHY block generates 2 clock outputs (Byte and Pixel > >>clocks) that are fed into the Multimedia Clock Controller (MMCC). The MMCC > >>uses these as source clocks for some of its RCGs to generate clocks that > >>finally feed to the DSI host controller. > >> > >>Use the assigned clocks DT bindings to set up the MMCC RCGs that feed to > >>the DSI host. Use the DSI PHY provided clocks to set up the parents > >>of these assigned clocks. > >> > >>Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx> > >>--- > >> Documentation/devicetree/bindings/display/msm/dsi.txt | 15 +++++++++++++++ > >> 1 file changed, 15 insertions(+) > >> > >>diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt > >>index 0223f06..686f475 100644 > >>--- a/Documentation/devicetree/bindings/display/msm/dsi.txt > >>+++ b/Documentation/devicetree/bindings/display/msm/dsi.txt > >>@@ -22,6 +22,10 @@ Required properties: > >> * "core_clk" > >> For DSIv2, we need an additional clock: > >> * "src_clk" > >>+- assigned-clocks: Parents of "byte_clk" and "pixel_clk" for the given platform. > >>+ See [1] for more details. > >>+- assigned-clock-parents: The Byte clock and Pixel clock PLL outputs provided > >>+ by a DSI PHY block. > >> - vdd-supply: phandle to vdd regulator device node > >> - vddio-supply: phandle to vdd-io regulator device node > >> - vdda-supply: phandle to vdda regulator device node > >>@@ -90,6 +94,8 @@ Required properties: > >> * "dsi_pll" > >> * "dsi_phy" > >> * "dsi_phy_regulator" > >>+- clock-cells: Must be 1. The DSI PHY block acts as a clock provider, creating > >>+ 2 clocks: A byte clock (index 0), and a pixel clock (index 1). > > > >You can't really add new required properties unless they are for a new > >compatible string. > > Does this hold even when currently there isn't any device tree file in > the kernel that has this DT node in it? Generally it should, but in this case that is fine. Acked-by: Rob Herring <robh@xxxxxxxxxx> > I was trying to get all the properties in place before posting out > patches that actually add the nodes into the platform files. Currently, > they exist only DT files in downstream kernels. "If it is not upstream, it doesn't exist." :) Rob -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
