[PATCH RFC 12/12] arm64: dts: qcom: sdm845-shift-axolotl: 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 SHIFT6mq:

  - 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. Higher
voltage PDOs are left out until the charger driver programs the allowed
USBIN adapter voltage.

Wire the USB-C connector port graph:
  - port@0: DWC3 HS endpoint for USB role switching
  - port@1: QMP combo PHY for SS lane orientation

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.

DisplayPort Alt Mode is not advertised yet, it will be added together
with enabling the DP controller (mdss_dp).

Assisted-by: LLM
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 62 ++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 1b0eaeafbd517..2ddbe732961a2 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -6,16 +6,17 @@
  */
 
 /dts-v1/;
 
 #include <dt-bindings/arm/qcom,ids.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include <dt-bindings/usb/pd.h>
 #include "sdm845.dtsi"
 #include "pm8998.dtsi"
 #include "pmi8998.dtsi"
 
 / {
 	model = "SHIFT SHIFT6mq";
 	compatible = "shift,axolotl", "qcom,sdm845";
 	chassis-type = "handset";
@@ -654,16 +655,66 @@ led-1 {
 		color = <LED_COLOR_ID_YELLOW>;
 		led-sources = <2>;
 		led-max-microamp = <100000>;
 		flash-max-microamp = <1100000>;
 		flash-max-timeout-us = <1280000>;
 	};
 };
 
+&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.
+		 *
+		 * Higher voltage sink PDOs will be added once the charger
+		 * driver programs the allowed USBIN adapter voltage.
+		 *
+		 * DisplayPort Alt Mode will be added together with enabling
+		 * the DP controller (mdss_dp).
+		 */
+		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>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				pmi8998_typec_mux_in: endpoint {
+					remote-endpoint = <&usb_1_qmpphy_out>;
+				};
+			};
+		};
+	};
+};
+
 &qup_uart9_rx {
 	drive-strength = <2>;
 	bias-pull-up;
 };
 
 &qup_uart9_tx {
 	drive-strength = <2>;
 	bias-disable;
@@ -855,17 +906,22 @@ &ufs_mem_phy {
 	vdda-pll-supply = <&vdda_ufs1_1p2>;
 };
 
 &usb_1 {
 	status = "okay";
 };
 
 &usb_1_dwc3 {
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	usb-role-switch;
+};
+
+&usb_1_dwc3_hs {
+	remote-endpoint = <&pmi8998_hs_in>;
 };
 
 &usb_1_hsphy {
 	status = "okay";
 
 	vdd-supply = <&vreg_l1a_0p875>;
 	vdda-phy-dpdm-supply = <&vreg_l24a_3p075>;
 	vdda-pll-supply = <&vreg_l12a_1p8>;
@@ -873,16 +929,20 @@ &usb_1_hsphy {
 
 &usb_1_qmpphy {
 	status = "okay";
 
 	vdda-phy-supply = <&vreg_l1a_0p875>;
 	vdda-pll-supply = <&vreg_l26a_1p2>;
 };
 
+&usb_1_qmpphy_out {
+	remote-endpoint = <&pmi8998_typec_mux_in>;
+};
+
 &venus {
 	firmware-name = "qcom/sdm845/SHIFT/axolotl/venus.mbn";
 
 	status = "okay";
 };
 
 &wifi {
 	vdd-0.8-cx-mx-supply = <&vreg_l5a_0p8>;

-- 
2.55.0