c - 配置 DTS 以连接多台摄像机

Question

我有来自 texas insturments 的以下补丁，它执行我想做的类似行为。CSI 多路复用器是：TS5MP646 是简单的两位 CSI 多路复用器

现在补丁是这样做的：

Two RPi camera headers present on EAIK are connected to each port of
two CSI2RX instances 0 and 1. Sensors are configured through I2C
interface via an I2C switch.

                     CSI2RX-0 ====> \\
                                      ==>RPi header==>RPi-Cam0(IMX219)
                    //
MAIN_I2C ==> I2C_switch(TCA954) ===>
                    \\
                                      ==>RPi header==>RPi-Cam1(IMX219)
                     CSI2RX-1 ====> //

Both MIPI and RPi connectors are connected to the CSI2 interface. A mux
select should be set to high to select the RPi connector. So add a node
to set the mux select pin to high.

Add node for the I2C switch through which the camera sensors shall be
configured.
Add  IMX219 camera nodes as a child node to the I2C switch.

在 RPi 相机和 CSI2RX 之间添加端点节点。

我真正需要的是以下内容：我想这样配置我的设置

I2C Multiplexer   ---------->   \  Camera RP0 

                                 /   Camera RP1

CSIRX --->  CSI-MULTIPLEXER  /  camera RPI 0 

                             \  Camera RPI 1

这是应用第一个配置的当前补丁代码，我想像前面提到的那样配置。当前补丁代码：

+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pinctrl/k3.h>
+
+/ {
+   fragment@101 {
+       target-path = "/";
+
+       __overlay__ {
+           clk_imx219_fixed: imx219-xclk {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <24000000>;
+           };
+       };
+   };
+};
+
+&main_pmx0 {
+   main_rpi_cam0_reset_pins_default: main-rpi-cam0-reset-pins-default {
+       pinctrl-single,pins = <
+           J721E_IOPAD(0x1D4, PIN_OUTPUT, 7) /* (Y3) SPI1_CS0 */
+       >;
+   };
+
+   main_rpi_cam1_reset_pins_default: main-rpi-cam1-reset-pins-default {
+       pinctrl-single,pins = <
+           J721E_IOPAD(0x1E0, PIN_OUTPUT, 7) /* (Y5) SPI1_D0 */
+       >;
+   };
+
+   main_csi_mux_sel2_pins_default: main-csi-mux-sel2-pins-default {
+       pinctrl-single,pins = <
+           J721E_IOPAD(0x164, PIN_OUTPUT, 7) /* (V29) RGMII5_TD2 */
+       >;
+   };
+};
+
+&main_gpio0 {
+   pinctrl-names = "default";
+   pinctrl-0 = <&main_csi_mux_sel2_pins_default>;
+
+   csi-mux-hog {
+       /* CSI_MUX_SEL_2 */
+       gpio-hog;
+       gpios = <88 GPIO_ACTIVE_HIGH>;
+       output-high;
+       line-name = "CSI_MUX_SEL_2";
+   };
+};
+
+&main_i2c3 {
+   #address-cells = <1>;
+   #size-cells = <0>;
+
+   i2c-switch@70 {
+       compatible = "nxp,pca9543";
+       #address-cells = <1>;
+       #size-cells = <0>;
+       reg = <0x70>;
+
+       i2c-alias-pool = /bits/ 16 <0x10 0x11>;
+
+       /* CAM0 I2C */
+       cam0_i2c: i2c@0 {
+           #address-cells = <1>;
+           #size-cells = <0>;
+           reg = <0>;
+
+           imx219_0: imx219_0@10 {
+               compatible = "sony,imx219";
+               reg = <0x10>;
+
+               clocks = <&clk_imx219_fixed>;
+               clock-names = "xclk";
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&main_rpi_cam0_reset_pins_default>;
+               reset-gpios = <&main_gpio0 116 GPIO_ACTIVE_HIGH>;
+
+               port {
+                   csi2_cam0: endpoint {
+                       remote-endpoint = <&csi2rx0_in_sensor>;
+                       link-frequencies = /bits/ 64 <456000000>;
+                       clock-lanes = <0>;
+                       data-lanes = <1 2>;
+                   };
+               };
+           };
+       };
+
+       /* CAM1 I2C */
+       cam1_i2c: i2c@1 {
+           #address-cells = <1>;
+           #size-cells = <0>;
+           reg = <1>;
+
+           imx219_1: imx219_1@10 {
+               compatible = "sony,imx219";
+               reg = <0x10>;
+
+               clocks = <&clk_imx219_fixed>;
+               clock-names = "xclk";
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&main_rpi_cam1_reset_pins_default>;
+               reset-gpios = <&main_gpio0 119 GPIO_ACTIVE_HIGH>;
+
+               port {
+                   csi2_cam1: endpoint {
+                       remote-endpoint = <&csi2rx1_in_sensor>;
+                       link-frequencies = /bits/ 64 <456000000>;
+                       clock-lanes = <0>;
+                       data-lanes = <1 2>;
+                   };
+               };
+           };
+       };
+   };
+};
+
+&csi0_port0 {
+   csi2rx0_in_sensor: endpoint {
+       remote-endpoint = <&csi2_cam0>;
+       bus-type = <4>; /* CSI2 DPHY. */
+       clock-lanes = <0>;
+       data-lanes = <1 2>;
+   };
+};
+
+&csi1_port0 {
+   csi2rx1_in_sensor: endpoint {
+       remote-endpoint = <&csi2_cam1>;
+       bus-type = <4>; /* CSI2 DPHY. */
+       clock-lanes = <0>;
+       data-lanes = <1 2>;
+   };
+};

标签： clinuxraspberry-pilinux-device-driver