[PATCH RFC 12/12] arm64: dts: qcom: sdm845-shift-axolotl: Enable USB Type-C port controller
From: David Heidelberg via B4 Relay
Date: Sat Sep 26 2026 - 08:45:22 EST
From: David Heidelberg <david@xxxxxxx>
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@xxxxxxx>
---
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