Device-Tree bindings for Rockchip SoC display controller (VOP / LCDC)
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VOP (Video Output Process) / LCDC is the Display Controller for the
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ROCKCHIP series of SoCs which transfers the image data from a video memory
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buffer to an external LCD interface.
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Required properties:
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- compatible: value should be one of the following
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"rockchip,rk3288-lcdc"; /* for RK3288 SoCs */
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"rockchip,rk3368-lcdc"; /* for RK3368 SoCs */
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"rockchip,rk322x-lcdc"; /* for RK322X SoCs */
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"rockchip,rk3399-lcdc"; /* for RK3399 SoCs */
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- rockchip,prop: set the lcdc as primary or extend display.
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- rochchip,pwr18: set the controller IO voltage,0 is 3.3v,1 is 1.8v.
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- reg: physical base address and length of the LCDC registers set.
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- interrupts: interrupt number to the cpu and interrupt proterties.
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- pinctrl-names: must contain a "default" entry.
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- pinctrl-0: pin control group to be used for this controller.
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- pinctrl-1: pin control group to be used for gpio.
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- clocks: must include clock specifiers corresponding to entries in the
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clock-names property.
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- clock-names: list of clock names sorted in the same order as the clocks
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property..
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Optional Properties:
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- rockchip,debug: printk debug message.
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- rockchip,mirror: the lcdc mirror function.
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- lcd_en:lcd_en: contain power control for lcd.
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- rockchip,power_type: power type,GPIO or REGULATOR.
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- gpios: pin number for gpio.
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- rockchip,delay: delay time after set power.
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Example:
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SoC specific DT entry:
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lcdc1: lcdc@ff940000 {
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compatible = "rockchip,rk3288-lcdc";
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rockchip,prop = <PRMRY>;
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rochchip,pwr18 = <0>;
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reg = <0xff940000 0x10000>;
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interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
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pinctrl-names = "default", "gpio";
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pinctrl-0 = <&lcdc0_lcdc>;
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pinctrl-1 = <&lcdc0_gpio>;
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status = "disabled";
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clocks = <&clk_gates15 7>, <&dclk_lcdc1>, <&clk_gates15 8>, <&pd_vop1>;
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clock-names = "aclk_lcdc", "dclk_lcdc", "hclk_lcdc", "pd_lcdc";
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};
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Board specific DT entry:
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&lcdc1 {
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status = "okay";
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power_ctr: power_ctr {
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rockchip,debug = <0>;
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rockchip,mirror = <NO_MIRROR>;
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lcd_en:lcd_en {
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rockchip,power_type = <GPIO>;
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gpios = <&gpio7 GPIO_A3 GPIO_ACTIVE_HIGH>;
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rockchip,delay = <10>;
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};
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lcd_cs:lcd_cs {
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rockchip,power_type = <GPIO>;
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gpios = <&gpio7 GPIO_A4 GPIO_ACTIVE_HIGH>;
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rockchip,delay = <10>;
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};
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};
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};
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