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Toybrick EN Wiki TB-RK3399ProD How to enable the PCI-E host
How to enable the PCI-E host

We have a PCI-E host at toybrick board, which supports up to PCI-E gen2 with 4 lanes.


A sample of device tree

  1. &pcie0 {
            ep-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
            num-lines = <4>;
            max-link-speed = <2>;
            pinctrl-names = "default";
            pinctrl-0 = <&pcie_clkreqn_cpm &pcie_ep>;
            status = "okay";
    };

ep-gpios: reset pins for this device.

num-lines: the max lane would be used for this device, up to 4 lanes

max-link-speed: the max speed 1 for GEN1 and 2 for GEN2

Enabling the device drive(We use RTL8169 as example here)

Select the device driver at kernel configure menu(we use menuconfig here):

1.png

After the kernel is refreshed, we can the device from the output of lspci:

1.png

You would find a ethernet device is added to system as well:

1.png



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