[PATCH RFC 11/12] arm64: dts: qcom: sdm845-oneplus-common: Enable USB Type-C port controller

[David Heidelberg via B4 Relay <devnull+david.ixit.cz@kernel.org>]

From: David Heidelberg <david@ixit.cz>

Enable the PMI8998 Type-C port controller with a USB-C connector
description for the OnePlus 6 (enchilada) and OnePlus 6T (fajita),
which share the same USB-C hardware via this common dtsi.

The connector is configured as:
  - Sink-only power role with a 5V/3A sink PDO
  - Dual-role data with USB role switching

The VBUS output of the charger is not supported yet, so the port can't
act as a power source. Describe it as sink-only until VBUS support lands,
USB host mode is still reachable through a PD data role swap.

Only the HS endpoint (port@0) is wired to the DWC3 controller since
these devices use USB 2.0 only — the QMP USB3+DP combo PHY is not
connected in the OnePlus 6/6T hardware design. Consequently, no
DisplayPort Alt Mode is advertised and no SS orientation switching is
needed.

Switch the DWC3 controller from peripheral-only to OTG mode with
usb-role-switch to allow the TCPM framework to control USB host/device
role based on CC pin detection.

Assisted-by: LLM
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 .../arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi | 48 +++++++++++++++++++++-
 1 file changed, 46 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
index 439779f308e38..c71cbd1effe91 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
@@ -6,16 +6,17 @@
  */
 
 /dts-v1/;
 
 #include <dt-bindings/arm/qcom,ids.h>
 #include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include <dt-bindings/usb/pd.h>
 #include <dt-bindings/sound/qcom,q6afe.h>
 #include <dt-bindings/sound/qcom,q6asm.h>
 
 #include "sdm845.dtsi"
 #include "sdm845-wcd9340.dtsi"
 #include "pm8998.dtsi"
 #include "pmi8998.dtsi"
 
@@ -639,16 +640,53 @@ pinconf {
 		};
 	};
 };
 
 &pmi8998_charger {
 	status = "okay";
 };
 
+&pmi8998_typec {
+	status = "okay";
+
+	vdd-pdphy-supply = <&vreg_l24a_3p075>;
+
+	connector {
+		compatible = "usb-c-connector";
+
+		/*
+		 * Sink only for now, as the PMI8998 charger doesn't provide
+		 * the VBUS output yet. Switch to the dual power role with
+		 * source PDOs, try-power-role and vbus-supply once it is
+		 * supported.
+		 */
+		power-role = "sink";
+		data-role = "dual";
+		self-powered;
+
+		sink-pdos = <PDO_FIXED(5000, 3000,
+				       PDO_FIXED_USB_COMM |
+				       PDO_FIXED_DATA_SWAP)>;
+		op-sink-microwatt = <15000000>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				pmi8998_hs_in: endpoint {
+					remote-endpoint = <&usb_1_dwc3_hs>;
+				};
+			};
+		};
+	};
+};
+
 &pmi8998_flash {
 	status = "okay";
 
 	led-0 {
 		function = LED_FUNCTION_FLASH;
 		color = <LED_COLOR_ID_WHITE>;
 		led-sources = <1>;
 		led-max-microamp = <500000>;
@@ -929,28 +967,34 @@ &usb_1 {
 	 * disable USB3 clock requirement as the device only supports
 	 * USB2.
 	 */
 	qcom,select-utmi-as-pipe-clk;
 };
 
 &usb_1_dwc3 {
 	/*
-	 * We don't have the capability to switch modes yet.
+	 * The USB-C role is managed by the pmi8998 Type-C port controller
+	 * via usb-role-switch.
 	 */
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	usb-role-switch;
 
 	/* fastest mode for USB 2 */
 	maximum-speed = "high-speed";
 
 	/* Remove USB3 phy as it's unused on this device. */
 	phys = <&usb_1_hsphy>;
 	phy-names = "usb2-phy";
 };
 
+&usb_1_dwc3_hs {
+	remote-endpoint = <&pmi8998_hs_in>;
+};
+
 &usb_1_hsphy {
 	status = "okay";
 
 	vdd-supply = <&vdda_usb1_ss_core>;
 	vdda-pll-supply = <&vdda_qusb_hs0_1p8>;
 	vdda-phy-dpdm-supply = <&vdda_qusb_hs0_3p1>;
 
 	qcom,imp-res-offset-value = <8>;

-- 
2.55.0