linux-kernel - [PATCH 5/5] arm64: dts: qcom: sm7225-fairphone-fp4: Enable USB role switching

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Message-Id: <20240322-fp4-tcpm-v1-5-c5644099d57b@fairphone.com>
Date: Fri, 22 Mar 2024 09:01:36 +0100
From: Luca Weiss <luca.weiss@...rphone.com>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Wesley Cheng <quic_wcheng@...cinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-usb@...r.kernel.org, 
 Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH 5/5] arm64: dts: qcom: sm7225-fairphone-fp4: Enable USB
 role switching

Configure the Type-C and VBUS regulator on PM7250B and wire it up to the
USB PHY, so that USB role and orientation switching works.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
With this patch I'm not quite sure if the 'ports' are connected
correctly, though functionally everything appears to work fine.

On some other SoCs port@1 in qmpphy and a second port in dwc3 are
connected together also - one port of USB 2.0 HS, one for USB 3.0 SS.

Here I'm following sm8250's solution. Also checking the binding doc
doesn't reveal anything useful.
---
 arch/arm64/boot/dts/qcom/sm6350.dtsi              | 25 ++++++++++
 arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts | 57 ++++++++++++++++++++++-
 2 files changed, 81 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm6350.dtsi b/arch/arm64/boot/dts/qcom/sm6350.dtsi
index 24bcec3366ef..b267500467f0 100644
--- a/arch/arm64/boot/dts/qcom/sm6350.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm6350.dtsi
@@ -1686,6 +1686,27 @@ usb_1_qmpphy: phy@...8000 {
 			#phy-cells = <1>;
 
 			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					usb_1_qmpphy_out: endpoint {};
+				};
+
+				port@1 {
+					reg = <1>;
+				};
+
+				port@2 {
+					reg = <2>;
+
+					usb_1_qmpphy_dp_in: endpoint {};
+				};
+			};
 		};
 
 		dc_noc: interconnect@...0000 {
@@ -1861,6 +1882,10 @@ usb_1_dwc3: usb@...0000 {
 				snps,hird-threshold = /bits/ 8 <0x10>;
 				phys = <&usb_1_hsphy>, <&usb_1_qmpphy QMP_USB43DP_USB3_PHY>;
 				phy-names = "usb2-phy", "usb3-phy";
+
+				port {
+					usb_1_role_switch_out: endpoint {};
+				};
 			};
 		};
 
diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
index bc67e8c1fe4d..104f23ec322d 100644
--- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
+++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
@@ -19,6 +19,7 @@
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include <dt-bindings/usb/pd.h>
 #include "sm7225.dtsi"
 #include "pm6150l.dtsi"
 #include "pm6350.dtsi"
@@ -543,6 +544,50 @@ conn-therm@1 {
 	};
 };
 
+&pm7250b_typec {
+	vdd-pdphy-supply = <&vreg_l3a>;
+
+	status = "okay";
+
+	connector {
+		compatible = "usb-c-connector";
+
+		power-role = "source";
+		data-role = "dual";
+		self-powered;
+
+		source-pdos = <PDO_FIXED(5000, 1500,
+					 PDO_FIXED_DUAL_ROLE |
+					 PDO_FIXED_USB_COMM |
+					 PDO_FIXED_DATA_SWAP)>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				pm7250b_role_switch_in: endpoint {
+					remote-endpoint = <&usb_1_role_switch_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				pm7250b_typec_mux_in: endpoint {
+					remote-endpoint = <&usb_1_qmpphy_out>;
+				};
+			};
+		};
+	};
+};
+
+&pm7250b_vbus {
+	regulator-min-microamp = <500000>;
+	regulator-max-microamp = <1500000>;
+	status = "okay";
+};
+
 &pmk8350_rtc {
 	status = "okay";
 };
@@ -726,7 +771,12 @@ &usb_1 {
 
 &usb_1_dwc3 {
 	maximum-speed = "super-speed";
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	usb-role-switch;
+};
+
+&usb_1_role_switch_out {
+	remote-endpoint = <&pm7250b_role_switch_in>;
 };
 
 &usb_1_hsphy {
@@ -740,10 +790,15 @@ &usb_1_hsphy {
 &usb_1_qmpphy {
 	vdda-phy-supply = <&vreg_l22a>;
 	vdda-pll-supply = <&vreg_l16a>;
+	orientation-switch;
 
 	status = "okay";
 };
 
+&usb_1_qmpphy_out {
+	remote-endpoint = <&pm7250b_typec_mux_in>;
+};
+
 &wifi {
 	vdd-0.8-cx-mx-supply = <&vreg_l4a>;
 	vdd-1.8-xo-supply = <&vreg_l7a>;

-- 
2.44.0