linux-kernel - [PATCH v4 15/24] ARM: tegra: Add usb-role-switch property to USB OTG ports

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Date:   Wed,  1 Dec 2021 01:38:11 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        David Heidelberg <david@...t.cz>,
        Svyatoslav Ryhel <clamor95@...il.com>,
        Anton Bambura <jenneron@...tonmail.com>,
        Antoni Aloy Torrens <aaloytorrens@...il.com>,
        Nikola Milosavljevic <mnidza@...look.com>,
        Ion Agorria <ion@...rria.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Ihor Didenko <tailormoon@...bler.ru>,
        Andreas Westman Dorcsak <hedmoo@...oo.com>,
        Maxim Schwalm <maxim.schwalm@...il.com>,
        Raffaele Tranquillini <raffaele.tranquillini@...il.com>,
        Jasper Korten <jja2000@...il.com>,
        Thomas Graichen <thomas.graichen@...il.com>,
        Stefan Eichenberger <stefan.eichenberger@...adex.com>
Cc:     devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 15/24] ARM: tegra: Add usb-role-switch property to USB OTG ports

From: Stefan Eichenberger <stefan.eichenberger@...adex.com>

If an USB port is an OTG port, then we should add the usb-role-switch
property. Otherwise XUSB setup fails and therefore padctl is unable to
set up the ports. This leads to broken USB and PCIe ports. Add the
usb-role-switch properties to Tegra124 device-trees to fix the problem.

The error message shown without this patch is e.g:
usb2-0: usb-role-switch not found for otg mode

[digetx@...il.com: improved commit message]
Tested-by: Thomas Graichen <thomas.graichen@...il.com> # T124 Nyan Big
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi | 1 +
 arch/arm/boot/dts/tegra124-apalis.dtsi      | 1 +
 arch/arm/boot/dts/tegra124-nyan.dtsi        | 1 +
 arch/arm/boot/dts/tegra124-venice2.dts      | 2 +-
 4 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi b/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
index cde9ae8fa04b..b9198f842a34 100644
--- a/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
+++ b/arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi
@@ -1885,6 +1885,7 @@ ports {
 			usb2-0 {
 				status = "okay";
 				mode = "otg";
+				usb-role-switch;
 				vbus-supply = <&reg_usbo1_vbus>;
 			};
 
diff --git a/arch/arm/boot/dts/tegra124-apalis.dtsi b/arch/arm/boot/dts/tegra124-apalis.dtsi
index a46d9ba9bb7a..1a996fb78ee2 100644
--- a/arch/arm/boot/dts/tegra124-apalis.dtsi
+++ b/arch/arm/boot/dts/tegra124-apalis.dtsi
@@ -1877,6 +1877,7 @@ ports {
 			usb2-0 {
 				status = "okay";
 				mode = "otg";
+				usb-role-switch;
 				vbus-supply = <&reg_usbo1_vbus>;
 			};
 
diff --git a/arch/arm/boot/dts/tegra124-nyan.dtsi b/arch/arm/boot/dts/tegra124-nyan.dtsi
index 63a81270300a..93a40a84b792 100644
--- a/arch/arm/boot/dts/tegra124-nyan.dtsi
+++ b/arch/arm/boot/dts/tegra124-nyan.dtsi
@@ -466,6 +466,7 @@ usb2-0 {
 				vbus-supply = <&vdd_usb1_vbus>;
 				status = "okay";
 				mode = "otg";
+				usb-role-switch;
 			};
 
 			usb2-1 {
diff --git a/arch/arm/boot/dts/tegra124-venice2.dts b/arch/arm/boot/dts/tegra124-venice2.dts
index e6b54ac1ebd1..de8c18e6b7e6 100644
--- a/arch/arm/boot/dts/tegra124-venice2.dts
+++ b/arch/arm/boot/dts/tegra124-venice2.dts
@@ -972,7 +972,7 @@ ports {
 			usb2-0 {
 				status = "okay";
 				mode = "otg";
-
+				usb-role-switch;
 				vbus-supply = <&vdd_usb1_vbus>;
 			};
 
-- 
2.33.1