On Fri, May 19, 2017 at 05:20:17PM +0200, Philippe CORNU wrote: > This patch adds documentation of device tree bindings for the STM32 > DSI host driver based on the Synopsys DW MIPI DSI driver from Rockchip. > > Signed-off-by: Philippe CORNU <philippe.cornu@xxxxxx> > --- > .../devicetree/bindings/display/st,stm32-ltdc.txt | 102 ++++++++++++++++++++- > 1 file changed, 100 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt b/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt > index 8e14769..18a57a2 100644 > --- a/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt > +++ b/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt > @@ -1,7 +1,6 @@ > * STMicroelectronics STM32 lcd-tft display controller > > - ltdc: lcd-tft display controller host > - must be a sub-node of st-display-subsystem > Required properties: > - compatible: "st,stm32-ltdc" > - reg: Physical base address of the IP registers and length of memory mapped region. > @@ -13,8 +12,37 @@ > Required nodes: > - Video port for RGB output. > > -Example: > +* STMicroelectronics STM32 specific extensions to Synopsys DesignWare MIPI DSI > > +Required properties: > +- #address-cells: Should be <1>. > +- #size-cells: Should be <0>. > +- compatible: "st,stm32-dsi". > +- reg: Memory mapped base address and length of the DWC MIPI DSI registers. > +- clocks: References to all the clocks specified in the clock-names property > + as specified in [1]. > +- clock-names: The DWC MIPI DSI host uses the following clocks. > + - "pclk" is the peripheral clock for either AHB and APB (mandatory). > + - "ref" is the pll reference clock (mandatory). Just "See [5]" is enough description here. > +- resets: References to all the resets specified in the reset-names property > + as specified in [2]. (optional) > +- reset-names: string reset name, must be "apb" if used. (optional) > +- ports: The connectivity of the DWC MIPI DSI host controller > + with the rest of the system is expressed in using ports as specified in the > + device graph bindings in [2]. > + - port@0 is the dsi input, connected to the ltdc output port. > + - port@1 is the dsi output, connected to the dsi panel or bridge. > + > +Note: You can find more documentation related to the Synopsys DesignWare MIPI > +DSI host controller in [5]. > + > +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt > +[2] Documentation/devicetree/bindings/reset/reset.txt > +[3] Documentation/devicetree/bindings/media/video-interfaces.txt > +[4] Documentation/devicetree/bindings/graph.txt > +[5] Documentation/devicetree/bindings/display/bridge/dw_mipi_dsi.txt > + > +Example 1: RGB panel > / { > ... > soc { > @@ -34,3 +62,73 @@ Example: > }; > }; > }; > + > +Example 2: DSI panel > + > +/ { > + ... > + soc { > + ... > + ltdc: display-controller@40016800 { > + compatible = "st,stm32-ltdc"; > + reg = <0x40016800 0x200>; > + interrupts = <88>, <89>; > + resets = <&rcc STM32F4_APB2_RESET(LTDC)>; > + clocks = <&rcc 1 CLK_LCD>; > + clock-names = "lcd"; > + > + port { > + ltdc_out_dsi: endpoint { > + remote-endpoint = <&dsi_in>; > + }; > + }; > + }; > + > + > + dsi: dsi@40016C00 { nit: lowercase hex > + #address-cells = <1>; > + #size-cells = <0>; > + compatible = "st,stm32-dsi"; > + reg = <0x40016C00 0x800>; here too. > + clocks = <&rcc 1 CLK_F469_DSI>, <&clk_hse>; > + clock-names = "ref", "pclk"; > + resets = <&rcc STM32F4_APB2_RESET(DSI)>; > + reset-names = "apb"; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@0 { > + reg = <0>; > + dsi_in: endpoint { > + remote-endpoint = <<dc_out_dsi>; > + }; > + }; > + > + port@1 { > + reg = <1>; > + dsi_out_panel: endpoint { > + remote-endpoint = <&dsi_in_panel>; > + }; > + }; > + > + }; > + > + panel-dsi@0 { > + reg = <0>; /* dsi virtual channel (0..3) */ > + compatible = ...; > + enable-gpios = ...; > + > + port { > + dsi_in_panel: endpoint { > + remote-endpoint = <&dsi_out_panel>; > + }; > + }; > + > + }; > + > + }; > + > + }; > +}; > -- > 1.9.1 > -- 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