ROHM BU18TL82/BU18RL82 Clockless Link-BD Serializer/Deserializer bridge bindings
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Required properties:
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- compatible: "rohm,bu18tl82" or "rohm,bu18rl82"
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- reg: i2c address of the bridge
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- serdes-init-sequence: register initial code from Rohm vendor
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optional properties:
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- reset-gpios: a GPIO spec for the reset pin
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- enable-gpios: a GPIO spec for the enable pin
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- power-supply: Reference to the regulator powering the serdes power supply pins
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- sel-mipi: string property for mipi dsi data stream input
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Example:
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/ {
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panel {
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compatible = "simple-panel";
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backlight = <&backlight>;
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display-timings {
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native-mode = <&timing0>;
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timing0: timing0 {
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clock-frequency = <87000000>;
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hactive = <1920>;
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vactive = <720>;
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hfront-porch = <32>;
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hsync-len = <10>;
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hback-porch = <22>;
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vfront-porch = <10>;
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vsync-len = <4>;
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vback-porch = <7>;
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hsync-active = <0>;
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vsync-active = <0>;
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de-active = <0>;
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pixelclk-active = <0>;
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};
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};
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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panel0_in_i2c2_bu18rl82: endpoint {
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remote-endpoint = <&i2c2_bu18rl82_out_panel0>;
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};
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};
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};
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};
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};
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&dsi {
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status = "okay";
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@1 {
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reg = <1>;
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dsi0_out_i2c2_bu18tl82: endpoint {
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remote-endpoint = <&i2c2_bu18tl82_in_dsi0>;
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};
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};
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};
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};
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&i2c2 {
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status = "okay";
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bu18tl82: bu18tl82@10 {
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compatible = "rohm,bu18tl82";
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reg = <0x10>;
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pinctrl-names = "default";
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pinctrl-0 = <&ser0_rst_gpio>;
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reset-gpios = <&gpio1 RK_PA4 GPIO_ACTIVE_LOW>;
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sel-mipi;
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status = "okay";
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serdes-init-sequence = [
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/* TL82 Pattern Gen Set 1
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* Horizontal Gray Scale 256 steps
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*/
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040A 0010
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040B 0080
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040C 0080
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040D 0080
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0444 0019
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0445 0020
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0446 001f
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...
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];
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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i2c2_bu18tl82_in_dsi0: endpoint {
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remote-endpoint = <&dsi0_out_i2c2_bu18tl82>;
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};
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};
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port@1 {
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reg = <1>;
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i2c2_bu18tl82_out_i2c2_bu18rl82: endpoint {
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remote-endpoint = <&i2c2_bu18rl82_in_i2c2_bu18tl82>;
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};
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};
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};
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};
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bu18rl82: bu18rl82@30 {
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compatible = "rohm,bu18rl82";
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reg = <0x30>;
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status = "okay";
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serdes-init-sequence = [
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/* RL82 Pattern Gen Set
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* Vertical Gray Scale Color Bar
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*/
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060A 00B0
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060B 00FF
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060C 00FF
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060D 00FF
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0644 0019
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0645 0020
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0646 001f
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...
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];
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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i2c2_bu18rl82_in_i2c2_bu18tl82: endpoint {
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remote-endpoint = <&i2c2_bu18tl82_out_i2c2_bu18rl82>;
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};
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};
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port@1 {
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reg = <1>;
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i2c2_bu18rl82_out_panel0: endpoint {
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remote-endpoint = <&panel0_in_i2c2_bu18rl82>;
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};
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};
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};
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};
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};
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