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-rw-r--r--doc/device-tree-bindings/i2c/i2c-mux.txt60
-rw-r--r--doc/device-tree-bindings/video/bridge/ps8622.txt33
2 files changed, 93 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/i2c/i2c-mux.txt b/doc/device-tree-bindings/i2c/i2c-mux.txt
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+Common i2c bus multiplexer/switch properties.
+
+An i2c bus multiplexer/switch will have several child busses that are
+numbered uniquely in a device dependent manner. The nodes for an i2c bus
+multiplexer/switch will have one child node for each child
+bus.
+
+Required properties:
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Required properties for child nodes:
+- #address-cells = <1>;
+- #size-cells = <0>;
+- reg : The sub-bus number.
+
+Optional properties for child nodes:
+- Other properties specific to the multiplexer/switch hardware.
+- Child nodes conforming to i2c bus binding
+
+
+Example :
+
+ /*
+ An NXP pca9548 8 channel I2C multiplexer at address 0x70
+ with two NXP pca8574 GPIO expanders attached, one each to
+ ports 3 and 4.
+ */
+
+ mux@70 {
+ compatible = "nxp,pca9548";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+
+ gpio1: gpio@38 {
+ compatible = "nxp,pca8574";
+ reg = <0x38>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ };
+ };
+ i2c@4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <4>;
+
+ gpio2: gpio@38 {
+ compatible = "nxp,pca8574";
+ reg = <0x38>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ };
+ };
+ };
diff --git a/doc/device-tree-bindings/video/bridge/ps8622.txt b/doc/device-tree-bindings/video/bridge/ps8622.txt
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+++ b/doc/device-tree-bindings/video/bridge/ps8622.txt
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+ps8622-bridge bindings
+
+Required properties:
+ - compatible: "parade,ps8622" or "parade,ps8625"
+ - reg: first i2c address of the bridge
+ - sleep-gpios: OF device-tree gpio specification for PD_ pin.
+ - reset-gpios: OF device-tree gpio specification for RST_ pin.
+ - parade,regs: List of 3-byte registers tuples to write:
+ <I2C chip address offset> <register> <value>
+
+Optional properties:
+ - lane-count: number of DP lanes to use
+ - use-external-pwm: backlight will be controlled by an external PWM
+ - video interfaces: Device node can contain video interface port
+ nodes for panel according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+ lvds-bridge@48 {
+ compatible = "parade,ps8622";
+ reg = <0x48>;
+ sleep-gpios = <&gpc3 6 1 0 0>;
+ reset-gpios = <&gpc3 1 1 0 0>;
+ lane-count = <1>;
+ ports {
+ port@0 {
+ bridge_out: endpoint {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+ };
+ };