[PATCH RFC v2 2/2] arm64: dts: qcom: Add a minimal Xiaomi Warsaw description
From: Zhang Jiaxi
Date: Fri Oct 16 2026 - 11:56:27 EST
From: Jiaxi Zhang <z1529105815@xxxxxxxxxxx>
Add the Warsaw board identity, reference clocks, PM8550/PMK8550
devices, key wiring and inherited debug UART route. Describe the board
from the SoC and PMIC includes instead of inheriting all MTP devices.
Describe the USB2 peripheral connection, its regulator supplies and
PMIH0108 repeater directly in the board source. Leave other peripheral
bring-up out of this initial description.
Usable RAM and firmware reservations remain a bootloader contract. Do
not encode captured memory banks, private firmware regions or an
Android command line in the board description.
Assisted-by: LLM
Signed-off-by: Jiaxi Zhang <z1529105815@xxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/Makefile | 1 +
arch/arm64/boot/dts/qcom/sm8750-xiaomi-warsaw.dts | 258 ++++++++++++++++++++++
2 files changed, 259 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1c86e7e98..23ac53888 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -408,6 +408,7 @@ dtb-$(CONFIG_ARCH_QCOM) += sm8650-mtp.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8650-qrd.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8750-mtp.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8750-qrd.dtb
+dtb-$(CONFIG_ARCH_QCOM) += sm8750-xiaomi-warsaw.dtb
dtb-$(CONFIG_ARCH_QCOM) += talos-evk.dtb
talos-evk-el2-dtbs := talos-evk.dtb talos-el2.dtbo
diff --git a/arch/arm64/boot/dts/qcom/sm8750-xiaomi-warsaw.dts b/arch/arm64/boot/dts/qcom/sm8750-xiaomi-warsaw.dts
new file mode 100644
index 000000000..863e400d9
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm8750-xiaomi-warsaw.dts
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2026 Jiaxi Zhang <z1529105815@xxxxxxxxxxx>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/clock/qcom,rpmh.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include "sm8750.dtsi"
+#include "pm8550.dtsi"
+#include "pmk8550.dtsi"
+
+/ {
+ model = "Xiaomi Warsaw";
+ compatible = "xiaomi,warsaw", "qcom,sm8750";
+ chassis-type = "handset";
+
+ aliases {
+ serial0 = &uart7;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ clocks {
+ xo_board: xo-board {
+ compatible = "fixed-clock";
+ clock-frequency = <76800000>;
+ #clock-cells = <0>;
+ };
+
+ sleep_clk: sleep-clk {
+ compatible = "fixed-clock";
+ clock-frequency = <32000>;
+ #clock-cells = <0>;
+ };
+
+ bi_tcxo_div2: bi-tcxo-div2-clk {
+ compatible = "fixed-factor-clock";
+ #clock-cells = <0>;
+
+ clocks = <&rpmhcc RPMH_CXO_CLK>;
+ clock-mult = <1>;
+ clock-div = <2>;
+ };
+
+ bi_tcxo_ao_div2: bi-tcxo-ao-div2-clk {
+ compatible = "fixed-factor-clock";
+ #clock-cells = <0>;
+
+ clocks = <&rpmhcc RPMH_CXO_CLK_A>;
+ clock-mult = <1>;
+ clock-div = <2>;
+ };
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+
+ pinctrl-0 = <&volume_up_n>;
+ pinctrl-names = "default";
+
+ key-volume-up {
+ label = "Volume Up";
+ linux,code = <KEY_VOLUMEUP>;
+ gpios = <&pm8550_gpios 6 GPIO_ACTIVE_LOW>;
+ debounce-interval = <15>;
+ linux,can-disable;
+ wakeup-source;
+ };
+ };
+
+ vph_pwr: regulator-3v7 {
+ compatible = "regulator-fixed";
+ regulator-name = "vph_pwr";
+ regulator-min-microvolt = <3700000>;
+ regulator-max-microvolt = <3700000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+};
+
+&pm8550_gpios {
+ volume_up_n: volume-up-n-state {
+ pins = "gpio6";
+ function = "normal";
+ bias-pull-up;
+ input-enable;
+ power-source = <1>;
+ };
+};
+
+&pon_pwrkey {
+ status = "okay";
+};
+
+&pon_resin {
+ linux,code = <KEY_VOLUMEDOWN>;
+
+ status = "okay";
+};
+
+&qupv3_1 {
+ status = "okay";
+};
+
+&uart7 {
+ status = "okay";
+};
+
+&tlmm {
+ /* GPIOs reserved by the Warsaw firmware. */
+ gpio-reserved-ranges = <36 4>, <48 4>, <74 1>;
+};
+
+&apps_rsc {
+ regulators-0 {
+ compatible = "qcom,pm8550-rpmh-regulators";
+ qcom,pmic-id = "b";
+ vdd-bob1-supply = <&vph_pwr>;
+ vdd-l5-l16-supply = <&vreg_bob1>;
+ vdd-l15-supply = <&vreg_s3g_1p8>;
+
+ vreg_bob1: bob1 {
+ regulator-name = "vreg_bob1";
+ regulator-min-microvolt = <3008000>;
+ regulator-max-microvolt = <4000000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ };
+
+ vreg_l5b_3p1: ldo5 {
+ regulator-name = "vreg_l5b_3p1";
+ regulator-min-microvolt = <3100000>;
+ regulator-max-microvolt = <3148000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ regulator-allow-set-load;
+ regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM RPMH_REGULATOR_MODE_HPM>;
+ };
+
+ vreg_l15b_1p8: ldo15 {
+ regulator-name = "vreg_l15b_1p8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ regulator-allow-set-load;
+ regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM RPMH_REGULATOR_MODE_HPM>;
+ };
+ };
+
+ regulators-1 {
+ compatible = "qcom,pm8550ve-rpmh-regulators";
+ qcom,pmic-id = "d";
+ vdd-s1-supply = <&vph_pwr>;
+ vdd-l2-supply = <&vreg_s1d_0p97>;
+
+ vreg_s1d_0p97: smps1 {
+ regulator-name = "vreg_s1d_0p97";
+ regulator-min-microvolt = <880000>;
+ regulator-max-microvolt = <1100000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ };
+
+ vreg_l2d_0p88: ldo2 {
+ regulator-name = "vreg_l2d_0p88";
+ regulator-min-microvolt = <880000>;
+ regulator-max-microvolt = <912000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ regulator-allow-set-load;
+ regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM RPMH_REGULATOR_MODE_HPM>;
+ };
+ };
+
+ regulators-2 {
+ compatible = "qcom,pm8550ve-rpmh-regulators";
+ qcom,pmic-id = "g";
+ vdd-s3-supply = <&vph_pwr>;
+ vdd-l3-supply = <&vreg_s7i_1p2>;
+
+ vreg_s3g_1p8: smps3 {
+ regulator-name = "vreg_s3g_1p8";
+ regulator-min-microvolt = <1856000>;
+ regulator-max-microvolt = <2000000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
+ regulator-allow-set-load;
+ regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM RPMH_REGULATOR_MODE_HPM>;
+ };
+
+ vreg_l3g_1p2: ldo3 {
+ regulator-name = "vreg_l3g_1p2";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1256000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ regulator-allow-set-load;
+ regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM RPMH_REGULATOR_MODE_HPM>;
+ };
+ };
+
+ regulators-3 {
+ compatible = "qcom,pm8550ve-rpmh-regulators";
+ qcom,pmic-id = "i";
+ vdd-s7-supply = <&vph_pwr>;
+
+ vreg_s7i_1p2: smps7 {
+ regulator-name = "vreg_s7i_1p2";
+ regulator-min-microvolt = <1224000>;
+ regulator-max-microvolt = <1340000>;
+ regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+ };
+ };
+};
+
+&spmi_bus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+
+ pmic@7 {
+ compatible = "qcom,pmih0108", "qcom,spmi-pmic";
+ reg = <7 0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eusb2_repeater: phy@fd00 {
+ compatible = "qcom,pm8550b-eusb2-repeater";
+ reg = <0xfd00>;
+ #phy-cells = <0>;
+
+ vdd18-supply = <&vreg_l15b_1p8>;
+ vdd3-supply = <&vreg_l5b_3p1>;
+
+ qcom,tune-usb2-preem = /bits/ 8 <3>;
+ qcom,tune-usb2-amplitude = /bits/ 8 <10>;
+ qcom,squelch-detector-bp = <(-2000)>;
+ };
+ };
+};
+
+&usb_hsphy {
+ vdd-supply = <&vreg_l2d_0p88>;
+ vdda12-supply = <&vreg_l3g_1p2>;
+ phys = <&eusb2_repeater>;
+
+ status = "okay";
+};
+
+&usb {
+ phys = <&usb_hsphy>;
+ phy-names = "usb2-phy";
+ dr_mode = "peripheral";
+ maximum-speed = "high-speed";
+ qcom,select-utmi-as-pipe-clk;
+
+ status = "okay";
+};
--
2.55.0