linux-kernel - [PATCH v2 2/2] ARM: dts: bcm2711-rpi-4-b: Fix usb's unit address

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Message-Id: <20210831125843.1233488-2-nsaenzju@redhat.com>
Date:   Tue, 31 Aug 2021 14:58:43 +0200
From:   Nicolas Saenz Julienne <nsaenzju@...hat.com>
To:     robh+dt@...nel.org, nsaenz@...nel.org, f.fainelli@...il.com
Cc:     gregkh@...uxfoundation.org, devicetree@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stefan.wahren@...e.com,
        Nicolas Saenz Julienne <nsaenzju@...hat.com>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v2 2/2] ARM: dts: bcm2711-rpi-4-b: Fix usb's unit address

The unit address is supposed to represent '<device>,<function>'. Which
are both 0 for RPi4b's XHCI controller. On top of that although
OpenFirmware states bus number goes in the high part of the last reg
parameter, FDT doesn't seem to care for it[1], so remove it.

[1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210830103909.323356-1-nsaenzju@redhat.com/#24414633
Fixes: 258f92d2f840 ("ARM: dts: bcm2711: Add reset controller to xHCI node")
Suggested-by: Rob Herring <robh@...nel.org>
Signed-off-by: Nicolas Saenz Julienne <nsaenzju@...hat.com>
---

Chages since v1:
 - Add patch as per robh suggestion

 arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
index 8377dc14b7b5..50530cc91876 100644
--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -225,8 +225,8 @@ pci@0,0 {
 
 		reg = <0 0 0 0 0>;
 
-		usb@1,0 {
-			reg = <0x10000 0 0 0 0>;
+		usb@0,0 {
+			reg = <0 0 0 0 0>;
 			resets = <&reset RASPBERRYPI_FIRMWARE_RESET_ID_USB>;
 		};
 	};
-- 
2.31.1