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Diffstat (limited to '')
| -rw-r--r-- | Documentation/devicetree/bindings/display/atmel,lcdc.txt | 88 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt | 75 |
2 files changed, 163 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/atmel,lcdc.txt b/Documentation/devicetree/bindings/display/atmel,lcdc.txt new file mode 100644 index 000000000..acb5a0132 --- /dev/null +++ b/Documentation/devicetree/bindings/display/atmel,lcdc.txt @@ -0,0 +1,88 @@ +Atmel LCDC Framebuffer +----------------------------------------------------- + +Required properties: +- compatible : + "atmel,at91sam9261-lcdc" , + "atmel,at91sam9263-lcdc" , + "atmel,at91sam9g10-lcdc" , + "atmel,at91sam9g45-lcdc" , + "atmel,at91sam9g45es-lcdc" , + "atmel,at91sam9rl-lcdc" , + "atmel,at32ap-lcdc" +- reg : Should contain 1 register ranges(address and length). + Can contain an additional register range(address and length) + for fixed framebuffer memory. Useful for dedicated memories. +- interrupts : framebuffer controller interrupt +- display: a phandle pointing to the display node + +Required nodes: +- display: a display node is required to initialize the lcd panel + This should be in the board dts. +- default-mode: a videomode within the display with timing parameters + as specified below. + +Optional properties: +- lcd-supply: Regulator for LCD supply voltage. + +Example: + + fb0: fb@00500000 { + compatible = "atmel,at91sam9g45-lcdc"; + reg = <0x00500000 0x1000>; + interrupts = <23 3 0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_fb>; + display = <&display0>; + #address-cells = <1>; + #size-cells = <1>; + + }; + +Example for fixed framebuffer memory: + + fb0: fb@00500000 { + compatible = "atmel,at91sam9263-lcdc"; + reg = <0x00700000 0x1000 0x70000000 0x200000>; + [...] + }; + +Atmel LCDC Display +----------------------------------------------------- +Required properties (as per of_videomode_helper): + + - atmel,dmacon: dma controller configuration + - atmel,lcdcon2: lcd controller configuration + - atmel,guard-time: lcd guard time (Delay in frame periods) + - bits-per-pixel: lcd panel bit-depth. + +Optional properties (as per of_videomode_helper): + - atmel,lcdcon-backlight: enable backlight + - atmel,lcdcon-backlight-inverted: invert backlight PWM polarity + - atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG" + - atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed) + +Example: + display0: display { + bits-per-pixel = <32>; + atmel,lcdcon-backlight; + atmel,dmacon = <0x1>; + atmel,lcdcon2 = <0x80008002>; + atmel,guard-time = <9>; + atmel,lcd-wiring-mode = <1>; + + display-timings { + native-mode = <&timing0>; + timing0: timing0 { + clock-frequency = <9000000>; + hactive = <480>; + vactive = <272>; + hback-porch = <1>; + hfront-porch = <1>; + vback-porch = <40>; + vfront-porch = <1>; + hsync-len = <45>; + vsync-len = <1>; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt new file mode 100644 index 000000000..0398aec48 --- /dev/null +++ b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt @@ -0,0 +1,75 @@ +Device-Tree bindings for Atmel's HLCDC (High LCD Controller) DRM driver + +The Atmel HLCDC Display Controller is subdevice of the HLCDC MFD device. +See ../../mfd/atmel-hlcdc.txt for more details. + +Required properties: + - compatible: value should be "atmel,hlcdc-display-controller" + - pinctrl-names: the pin control state names. Should contain "default". + - pinctrl-0: should contain the default pinctrl states. + - #address-cells: should be set to 1. + - #size-cells: should be set to 0. + +Required children nodes: + Children nodes are encoding available output ports and their connections + to external devices using the OF graph reprensentation (see ../graph.txt). + At least one port node is required. + +Optional properties in grandchild nodes: + Any endpoint grandchild node may specify a desired video interface + according to ../../media/video-interfaces.txt, specifically + - bus-width: recognized values are <12>, <16>, <18> and <24>, and + override any output mode selection heuristic, forcing "rgb444", + "rgb565", "rgb666" and "rgb888" respectively. + +Example: + + hlcdc: hlcdc@f0030000 { + compatible = "atmel,sama5d3-hlcdc"; + reg = <0xf0030000 0x2000>; + interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>; + clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>; + clock-names = "periph_clk","sys_clk", "slow_clk"; + + hlcdc-display-controller { + compatible = "atmel,hlcdc-display-controller"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb888>; + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + hlcdc_panel_output: endpoint@0 { + reg = <0>; + remote-endpoint = <&panel_input>; + }; + }; + }; + + hlcdc_pwm: hlcdc-pwm { + compatible = "atmel,hlcdc-pwm"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_pwm>; + #pwm-cells = <3>; + }; + }; + +Example 2: With a video interface override to force rgb565; as above +but with these changes/additions: + + &hlcdc { + hlcdc-display-controller { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; + + port@0 { + hlcdc_panel_output: endpoint@0 { + bus-width = <16>; + }; + }; + }; + }; |