linux-kernel - [PATCH v3 4/9] ARM: dts: bcm2711: Add reset controller to xHCI node

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Message-Id: <20200612171334.26385-5-nsaenzjulienne@suse.de>
Date:   Fri, 12 Jun 2020 19:13:28 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     f.fainelli@...il.com, gregkh@...uxfoundation.org, wahrenst@....net,
        p.zabel@...gutronix.de, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-usb@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com, tim.gover@...pberrypi.org,
        linux-pci@...r.kernel.org, helgaas@...nel.org,
        andy.shevchenko@...il.com, mathias.nyman@...ux.intel.com,
        lorenzo.pieralisi@....com, devicetree@...r.kernel.org
Subject: [PATCH v3 4/9] ARM: dts: bcm2711: Add reset controller to xHCI node

The chip is hardwired to the board's PCIe bus and needs to be properly
setup trough a firmware routine after a PCI fundamental reset. Pass the
reset controller phandle that takes care of triggering the
initialization to the relevant PCI device.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

---

Changes since v2:
 - Use dt-bindings to access IDs

Changes since v1:
 - Update to match new binding

 arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
index 0cef95058fb0..e20979013414 100644
--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -4,6 +4,8 @@
 #include "bcm2835-rpi.dtsi"
 #include "bcm283x-rpi-usb-peripheral.dtsi"
 
+#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
+
 / {
 	compatible = "raspberrypi,4-model-b", "brcm,bcm2711";
 	model = "Raspberry Pi 4 Model B";
@@ -207,6 +209,13 @@ phy1: ethernet-phy@1 {
 	};
 };
 
+&pcie0 {
+	usb@1,0 {
+		reg = <0 0 0 0 0>;
+		resets = <&reset RASPBERRYPI_FIRMWARE_RESET_ID_USB>;
+	};
+};
+
 /* uart0 communicates with the BT module */
 &uart0 {
 	pinctrl-names = "default";
-- 
2.26.2