Re: [PATCH V2 2/2] ARM: dts: bcm2711: Add generic xHCI

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On 11/30/23 7:42 AM, Stefan Wahren wrote:
The BCM2711 SoC also has a generic xHCI. The USB port is currently
only usable on the Compute Module 4 (e.g. via IO board). Because
DWC2 and xHCI share the same PHY, we let the bootloader enable it
on demand.

Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
Tested-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>

Reviewed-by: Justin Chen <justin.chen@xxxxxxxxxxxx>

---
  arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi |  5 +++++
  arch/arm/boot/dts/broadcom/bcm2711.dtsi     | 14 ++++++++++++++
  2 files changed, 19 insertions(+)

diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi b/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
index 98817a6675b9..d233a191c139 100644
--- a/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi
@@ -1,6 +1,7 @@
  // SPDX-License-Identifier: GPL-2.0
  #include "bcm2835-rpi.dtsi"

+#include <dt-bindings/power/raspberrypi-power.h>
  #include <dt-bindings/reset/raspberrypi,firmware-reset.h>

  / {
@@ -76,3 +77,7 @@ &v3d {
  &vchiq {
  	interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
  };
+
+&xhci {
+	power-domains = <&power RPI_POWER_DOMAIN_USB>;
+};
diff --git a/arch/arm/boot/dts/broadcom/bcm2711.dtsi b/arch/arm/boot/dts/broadcom/bcm2711.dtsi
index 4a379a14966d..8e68884c2f0d 100644
--- a/arch/arm/boot/dts/broadcom/bcm2711.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm2711.dtsi
@@ -604,6 +604,20 @@ genet_mdio: mdio@e14 {
  			};
  		};

+		xhci: usb@7e9c0000 {
+			compatible = "brcm,xhci-brcm-v2";
+			reg = <0x0 0x7e9c0000 0x100000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+			/* DWC2 and this IP block share the same USB PHY,
+			 * enabling both at the same time results in lockups.
+			 * So keep this node disabled and let the bootloader
+			 * decide which interface should be enabled.
+			 */
+			status = "disabled";
+		};
+
  		v3d: gpu@7ec00000 {
  			compatible = "brcm,2711-v3d";
  			reg = <0x0 0x7ec00000 0x4000>,
--
2.34.1

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