1ARM HDLCD 2 3This is a display controller found on several development platforms produced 4by ARM Ltd and in more modern of its' Fast Models. The HDLCD is an RGB 5streamer that reads the data from a framebuffer and sends it to a single 6digital encoder (DVI or HDMI). 7 8Required properties: 9 - compatible: "arm,hdlcd" 10 - reg: Physical base address and length of the controller's registers. 11 - interrupts: One interrupt used by the display controller to notify the 12 interrupt controller when any of the interrupt sources programmed in 13 the interrupt mask register have activated. 14 - clocks: A list of phandle + clock-specifier pairs, one for each 15 entry in 'clock-names'. 16 - clock-names: A list of clock names. For HDLCD it should contain: 17 - "pxlclk" for the clock feeding the output PLL of the controller. 18 19Required sub-nodes: 20 - port: The HDLCD connection to an encoder chip. The connection is modeled 21 using the OF graph bindings specified in 22 Documentation/devicetree/bindings/graph.txt. 23 24Optional properties: 25 - memory-region: phandle to a node describing memory (see 26 Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) to be 27 used for the framebuffer; if not present, the framebuffer may be located 28 anywhere in memory. 29 30 31Example: 32 33/ { 34 ... 35 36 hdlcd@2b000000 { 37 compatible = "arm,hdlcd"; 38 reg = <0 0x2b000000 0 0x1000>; 39 interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>; 40 clocks = <&oscclk5>; 41 clock-names = "pxlclk"; 42 port { 43 hdlcd_output: endpoint@0 { 44 remote-endpoint = <&hdmi_enc_input>; 45 }; 46 }; 47 }; 48 49 /* HDMI encoder on I2C bus */ 50 i2c@7ffa0000 { 51 .... 52 hdmi-transmitter@70 { 53 compatible = "....."; 54 reg = <0x70>; 55 port@0 { 56 hdmi_enc_input: endpoint { 57 remote-endpoint = <&hdlcd_output>; 58 }; 59 60 hdmi_enc_output: endpoint { 61 remote-endpoint = <&hdmi_1_port>; 62 }; 63 }; 64 }; 65 66 }; 67 68 hdmi1: connector@1 { 69 compatible = "hdmi-connector"; 70 type = "a"; 71 port { 72 hdmi_1_port: endpoint { 73 remote-endpoint = <&hdmi_enc_output>; 74 }; 75 }; 76 }; 77 78 ... 79}; 80