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

Luca Weiss
2024-03-22T08:01:56Z

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@fairphone.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@88e8000 {
#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@9160000 {
@@ -1861,6 +1882,10 @@ usb_1_dwc3: usb@a600000 {
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