[PATCH v2 9/9] arm64: dts: renesas: ebisu: Describe PCIe/USB3.0 clock generator

[Geert Uytterhoeven]

On Sun, 18 Jan 2026 at 14:51, Marek Vasut
<marek.vasut+renesas at mailbox.org> wrote:
> Describe the 9FGV0841 PCIe and USB3.0 clock generator present on Ebisu
> board. The clock generator supplies 100 MHz differential clock for both
> PCIe slot and BT/WLAN expansion port, as well as for the USB 3.0 PHY.
>
> This configuration is valid for SW49 in OFF position, which means the
> PCIe signals are routed to the PCIe slot and U11 9FGV0841 PCIe clock
> generator output 3 supplies clock to the PCIe slot.
>
> In case the SW49 is set to ON position, which means the PCIe signals
> are routed to the EX BT/WLAN expansion port, and U11 9FGV0841 PCIe
> clock generator output 4 supplies clock to the port and &pciec0_rp
> clocks should be changed to "clocks = <&pcie_usb_clk 4>;". Once the
> BT/WLAN port is tested, this can be implemented using a DTO. Until
> then, assume SW49 is set to OFF position.
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>

Reviewed-by: Geert Uytterhoeven <geert+renesas at glider.be>
i.e. will queue in renesas-devel for v6.21.

> --- a/arch/arm64/boot/dts/renesas/ebisu.dtsi
> +++ b/arch/arm64/boot/dts/renesas/ebisu.dtsi
> @@ -578,12 +591,30 @@ &ohci0 {
>
>  &pcie_bus_clk {
>         clock-frequency = <100000000>;

I will drop the clock-frequency while applying, as there is no point
in changing it in a disabled node.

> +       status = "disabled";
>  };

> @@ -871,7 +902,19 @@ &usb2_phy0 {
>         status = "okay";
>  };
>
> +&usb3_phy0 {
> +       clocks = <&pcie_usb_clk 6>;
> +       status = "okay";
> +};
> +
> +&usb3s0_clk {
> +       clock-frequency = <100000000>;

Likewise.

> +       status = "disabled";
> +};
> +
>  &usb3_peri0 {
> +       phys = <&usb3_phy0>;
> +       phy-names = "usb";
>         companion = <&xhci0>;
>         status = "okay";
>  };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds