0001 Device-Tree bindings for Atmel's HLCDC (High LCD Controller) DRM driver
0002
0003 The Atmel HLCDC Display Controller is subdevice of the HLCDC MFD device.
0004 See ../../mfd/atmel-hlcdc.txt for more details.
0005
0006 Required properties:
0007 - compatible: value should be "atmel,hlcdc-display-controller"
0008 - pinctrl-names: the pin control state names. Should contain "default".
0009 - pinctrl-0: should contain the default pinctrl states.
0010 - #address-cells: should be set to 1.
0011 - #size-cells: should be set to 0.
0012
0013 Required children nodes:
0014 Children nodes are encoding available output ports and their connections
0015 to external devices using the OF graph reprensentation (see ../graph.txt).
0016 At least one port node is required.
0017
0018 Optional properties in grandchild nodes:
0019 Any endpoint grandchild node may specify a desired video interface
0020 according to ../../media/video-interfaces.txt, specifically
0021 - bus-width: recognized values are <12>, <16>, <18> and <24>, and
0022 override any output mode selection heuristic, forcing "rgb444",
0023 "rgb565", "rgb666" and "rgb888" respectively.
0024
0025 Example:
0026
0027 hlcdc: hlcdc@f0030000 {
0028 compatible = "atmel,sama5d3-hlcdc";
0029 reg = <0xf0030000 0x2000>;
0030 interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
0031 clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>;
0032 clock-names = "periph_clk","sys_clk", "slow_clk";
0033
0034 hlcdc-display-controller {
0035 compatible = "atmel,hlcdc-display-controller";
0036 pinctrl-names = "default";
0037 pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb888>;
0038 #address-cells = <1>;
0039 #size-cells = <0>;
0040
0041 port@0 {
0042 #address-cells = <1>;
0043 #size-cells = <0>;
0044 reg = <0>;
0045
0046 hlcdc_panel_output: endpoint@0 {
0047 reg = <0>;
0048 remote-endpoint = <&panel_input>;
0049 };
0050 };
0051 };
0052
0053 hlcdc_pwm: hlcdc-pwm {
0054 compatible = "atmel,hlcdc-pwm";
0055 pinctrl-names = "default";
0056 pinctrl-0 = <&pinctrl_lcd_pwm>;
0057 #pwm-cells = <3>;
0058 };
0059 };
0060
0061 Example 2: With a video interface override to force rgb565; as above
0062 but with these changes/additions:
0063
0064 &hlcdc {
0065 hlcdc-display-controller {
0066 pinctrl-names = "default";
0067 pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb565>;
0068
0069 port@0 {
0070 hlcdc_panel_output: endpoint@0 {
0071 bus-width = <16>;
0072 };
0073 };
0074 };
0075 };
