linux-kernel - [PATCH v1 1/1] arm64: dts: stingray: fix usb dma address translation

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Date:   Tue, 19 Jan 2021 11:04:44 +0530
From:   Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
To:     Rob Herring <robh+dt@...nel.org>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Arnd Bergmann <arnd@...db.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Bharat Gooty <bharat.gooty@...adcom.com>,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
Subject: [PATCH v1 1/1] arm64: dts: stingray: fix usb dma address translation

From: Bharat Gooty <bharat.gooty@...adcom.com>

Add a non-empty dma-ranges so that dma address translation
happens.

Fixes: 2013a4b684b6 ("arm64: dts: broadcom: clear the warnings caused by empty dma-ranges")

Signed-off-by: Bharat Gooty <bharat.gooty@...adcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
---
 arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi b/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
index aef8f2b00778..5401a646c840 100644
--- a/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
+++ b/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
@@ -4,11 +4,16 @@
  */
 	usb {
 		compatible = "simple-bus";
-		dma-ranges;
 		#address-cells = <2>;
 		#size-cells = <2>;
 		ranges = <0x0 0x0 0x0 0x68500000 0x0 0x00400000>;
 
+		/*
+		 * Internally, USB bus to the interconnect can only address up
+		 * to 40-bit
+		 */
+		dma-ranges = <0 0 0 0 0x100 0x0>;
+
 		usbphy0: usb-phy@0 {
 			compatible = "brcm,sr-usb-combo-phy";
 			reg = <0x0 0x00000000 0x0 0x100>;
-- 
2.17.1


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