[EXT] Re: [PATCH v5 3/3] ARM: imx6plus: optionally enable internal routing of clk_enet_ref

[Sven Van Asbroeck]

Hi Andy,

On Mon, Jul 6, 2020 at 1:30 AM Andy Duan <fugang.duan at nxp.com> wrote:
>
> The clock depends on board design, HW refer guide can describe the clk
> usage in detail and customer select one clk path as their board design.
>

Yes, I agree. But how does a board designer practically describe this
in the devicetree?

Example: mac_gtx -> clk_pad (the default)

Imagine I have a fixed oscillator on the board:

phy_ref_clk: oscillator {
    compatible = "fixed-clock";
    #clock-cells = <0>;
    clock-frequency = <50000000>;
};

How can I now make <&phy_ref_clk> the parent of
<&clks CLK_PAD> ?