arm64: dts: renesas: r8a77990: Add USB 3.0 PHY and USB3S0 clock nodes

Add USB 3.0 PHY and PHY clock node for R-Car E3.  The PHY node is
different in that it does not have control registers and extal clock,
which are not routed to the SoC pads on R-Car E3, therefore describe the
PHY as usb-nop-xceiv simple PHY.  Add USB3S0 clock pad fixed-clock node,
the frequency has to be overridden at board level.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-7-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm64/boot/dts/renesas/r8a77990.dtsi b/arch/arm64/boot/dts/renesas/r8a77990.dtsi
index 39824ba6e6d5b8667e5355656ef224058c5166ff..fadb5f4effcf0ab90827d495d718343f8996662c 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a77990.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77990.dtsi
@@ -2190,4 +2190,21 @@
                             <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
                interrupt-names = "sec-phys", "phys", "virt", "hyp-phys";
        };
+
+       /* External USB clock - to be overridden by boards that provide it */
+       usb3s0_clk: usb3s0-clk {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <0>;
+       };
+
+       usb3_phy0: usb-phy {
+               compatible = "usb-nop-xceiv";
+               clocks = <&usb3s0_clk>;
+               clock-names = "main_clk";
+               clock-frequency = <100000000>;
+               power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
+               #phy-cells = <0>;
+               status = "disabled";
+       };
 };