linux-kernel - [PATCH 5.4 24/61] arm64: dts: broadcom: Fix USB DMA address translation for Stingray

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Date:   Tue,  2 Feb 2021 14:38:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bharat Gooty <bharat.gooty@...adcom.com>,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>,
        Arnd Bergmann <arnd@...db.de>, Ray Jui <ray.jui@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 5.4 24/61] arm64: dts: broadcom: Fix USB DMA address translation for Stingray

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

commit da8ee66f56071aef0b5b0de41d2c2a97fa30c8a1 upstream.

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>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Ray Jui <ray.jui@...adcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- 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>;