| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | Device-Tree bindings for Atmel's HLCDC (High LCD Controller) DRM driver |
| 2 | |
| 3 | The Atmel HLCDC Display Controller is subdevice of the HLCDC MFD device. |
| 4 | See ../../mfd/atmel-hlcdc.txt for more details. |
| 5 | |
| 6 | Required properties: |
| 7 | - compatible: value should be "atmel,hlcdc-display-controller" |
| 8 | - pinctrl-names: the pin control state names. Should contain "default". |
| 9 | - pinctrl-0: should contain the default pinctrl states. |
| 10 | - #address-cells: should be set to 1. |
| 11 | - #size-cells: should be set to 0. |
| 12 | |
| 13 | Required children nodes: |
| 14 | Children nodes are encoding available output ports and their connections |
| 15 | to external devices using the OF graph representation (see ../graph.txt). |
| 16 | At least one port node is required. |
| 17 | |
| 18 | Optional properties in grandchild nodes: |
| 19 | Any endpoint grandchild node may specify a desired video interface |
| 20 | according to ../../media/video-interfaces.txt, specifically |
| 21 | - bus-width: recognized values are <12>, <16>, <18> and <24>, and |
| 22 | override any output mode selection heuristic, forcing "rgb444", |
| 23 | "rgb565", "rgb666" and "rgb888" respectively. |
| 24 | |
| 25 | Example: |
| 26 | |
| 27 | hlcdc: hlcdc@f0030000 { |
| 28 | compatible = "atmel,sama5d3-hlcdc"; |
| 29 | reg = <0xf0030000 0x2000>; |
| 30 | interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>; |
| 31 | clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>; |
| 32 | clock-names = "periph_clk","sys_clk", "slow_clk"; |
| 33 | |
| 34 | hlcdc-display-controller { |
| 35 | compatible = "atmel,hlcdc-display-controller"; |
| 36 | pinctrl-names = "default"; |
| 37 | pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb888>; |
| 38 | #address-cells = <1>; |
| 39 | #size-cells = <0>; |
| 40 | |
| 41 | port@0 { |
| 42 | #address-cells = <1>; |
| 43 | #size-cells = <0>; |
| 44 | reg = <0>; |
| 45 | |
| 46 | hlcdc_panel_output: endpoint@0 { |
| 47 | reg = <0>; |
| 48 | remote-endpoint = <&panel_input>; |
| 49 | }; |
| 50 | }; |
| 51 | }; |
| 52 | |
| 53 | hlcdc_pwm: hlcdc-pwm { |
| 54 | compatible = "atmel,hlcdc-pwm"; |
| 55 | pinctrl-names = "default"; |
| 56 | pinctrl-0 = <&pinctrl_lcd_pwm>; |
| 57 | #pwm-cells = <3>; |
| 58 | }; |
| 59 | }; |
| 60 | |
| 61 | Example 2: With a video interface override to force rgb565; as above |
| 62 | but with these changes/additions: |
| 63 | |
| 64 | &hlcdc { |
| 65 | hlcdc-display-controller { |
| 66 | pinctrl-names = "default"; |
| 67 | pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; |
| 68 | |
| 69 | port@0 { |
| 70 | hlcdc_panel_output: endpoint@0 { |
| 71 | bus-width = <16>; |
| 72 | }; |
| 73 | }; |
| 74 | }; |
| 75 | }; |