[PATCH 7/7] arm64: dts: qcom: Add Xiaomi Redmi 9T

From: Adam Skladowski

Date: Mon Aug 10 2026 - 13:39:11 EST

Add a devicetree for the Xiaomi Redmi 9T smartphone, which is based
on the Bengal/SM6115 SoC.

Supported functionality as of this initial submission:

* Display via SimpleFB/SimpleDRM
* GPU
* I2C peripherals (Backlight)
* Power Button, Volume Keys
* Regulators
* Remoteprocs (ADSP, CDSP, MPSS)
* UFS/SDCARD
* USB

Device tree also contains supply maps to other subsystems like MDSS
but due to missing dependencies like panel those are disabled.

Signed-off-by: Adam Skladowski <a39.skl@xxxxxxxxx>
---
arch/arm64/boot/dts/qcom/Makefile | 1 +
arch/arm64/boot/dts/qcom/sm6115-xiaomi-lemon.dts | 440 +++++++++++++++++++++++
2 files changed, 441 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1487f2beff3d..6dee0a99fdc6 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -345,6 +345,7 @@ dtb-$(CONFIG_ARCH_QCOM) += sm4250-oneplus-billie2.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm4450-qrd.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6115-fxtec-pro1x.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6115p-lenovo-j606f.dtb
+dtb-$(CONFIG_ARCH_QCOM) += sm6115-xiaomi-lemon.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6125-sony-xperia-seine-pdx201.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6125-xiaomi-ginkgo.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm6125-xiaomi-laurel-sprout.dtb
diff --git a/arch/arm64/boot/dts/qcom/sm6115-xiaomi-lemon.dts b/arch/arm64/boot/dts/qcom/sm6115-xiaomi-lemon.dts
new file mode 100644
index 000000000000..f33b8e2859ef
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm6115-xiaomi-lemon.dts
@@ -0,0 +1,440 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (c) 2026 Adam Skladowski <a39skl@xxxxxxxxx>
+ */
+
+/dts-v1/;
+
+#include "sm6115.dtsi"
+#include "pm6125.dtsi"
+#include <dt-bindings/leds/common.h>
+
+/delete-node/ &pil_ipa_fw_mem;
+/delete-node/ &pil_ipa_gsi_mem;
+/delete-node/ &pil_gpu_mem;
+/delete-node/ &pil_adsp_mem;
+/ {
+ model = "Xiaomi Redmi 9T";
+ compatible = "xiaomi,lemon", "qcom,sm6115";
+ chassis-type = "handset";
+
+ aliases {
+ mmc0 = &sdhc_2;
+ };
+
+ chosen {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ framebuffer0: framebuffer@5c000000 {
+ compatible = "simple-framebuffer";
+ reg = <0 0x5c000000 0 (2340 * 1080 * 4)>;
+ width = <1080>;
+ height = <2340>;
+ stride = <(1080 * 4)>;
+ format = "a8r8g8b8";
+ clocks = <&gcc GCC_DISP_HF_AXI_CLK>;
+ };
+ };
+
+ backlight_dsi: backlight-dsi {
+ compatible = "led-backlight";
+ leds = <&led_backlight>;
+ brightness-levels = <255>;
+ default-brightness-level = <190>;
+ /* Backlight controllers can differ between panel variants */
+ status = "disabled";
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&vol_up_n>;
+
+ key-volume-up {
+ label = "Volume Up";
+ linux,code = <KEY_VOLUMEUP>;
+ gpios = <&pm6125_gpios 5 GPIO_ACTIVE_LOW>;
+ debounce-interval = <15>;
+ linux,can-disable;
+ wakeup-source;
+ };
+ };
+
+ reserved-memory {
+
+ pil_cdsp_mem: memory@51a00000 {
+ reg = <0x0 0x51a00000 0x0 0xa00000>;
+ no-map;
+ };
+
+ pil_adsp_mem: memory@53400000 {
+ reg = <0x0 0x53400000 0x0 0x2600000>;
+ no-map;
+ };
+
+ pil_ipa_fw_mem: memory@55a00000 {
+ reg = <0x0 0x55a00000 0x0 0x10000>;
+ no-map;
+ };
+
+ pil_ipa_gsi_mem: memory@55a10000 {
+ reg = <0x0 0x55a10000 0x0 0x5000>;
+ no-map;
+ };
+
+ pil_gpu_mem: memory@fa400000 {
+ reg = <0x0 0xfa400000 0x0 0x2000>;
+ no-map;
+ };
+
+ ramoops@64000000 {
+ compatible = "ramoops";
+ no-map;
+ reg = <0x0 0x64000000 0x0 0x400000>;
+ record-size = <0x100000>;
+ console-size = <0x100000>;
+ pmsg-size = <0x200000>;
+ ecc-size = <16>;
+ };
+ };
+
+ vph_pwr: vph-pwr-regulator {
+ compatible = "regulator-fixed";
+ regulator-name = "vph_pwr";
+ regulator-min-microvolt = <3700000>;
+ regulator-max-microvolt = <3700000>;
+
+ regulator-always-on;
+ regulator-boot-on;
+ };
+};
+
+&dispcc {
+ /* Prevent simplefb from dying until we wire panel driver */
+ status = "disabled";
+};
+
+&gpi_dma0 {
+ status = "okay";
+};
+
+&gpu {
+ status = "okay";
+};
+
+&i2c1 {
+ status = "okay";
+
+ lm36923_bl: led-controller@36 {
+ compatible = "ti,lm36923";
+ reg = <0x36>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&lm3692x_bl_active>;
+
+ enable-gpios = <&tlmm 99 GPIO_ACTIVE_HIGH>;
+ ti,ovp-microvolt = <29000000>;
+ /* Backlight controllers can differ between panel variants */
+ status = "disabled";
+
+ led_backlight: led@0 {
+ reg = <0>;
+ function = LED_FUNCTION_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ label = ":backlight";
+ linux,default-trigger = "backlight";
+ led-max-microamp = <25000>;
+ };
+ };
+};
+
+&mdss_dsi0 {
+ vdda-supply = <&pm6125_l18>;
+};
+
+&mdss_dsi0_out {
+ data-lanes = <0 1 2 3>;
+};
+
+&pm6125_gpios {
+ vol_up_n: vol-up-n-state {
+ pins = "gpio5";
+ function = "normal";
+ power-source = <0>;
+ bias-pull-up;
+ input-enable;
+ };
+};
+
+&pon_pwrkey {
+ status = "okay";
+};
+
+&pon_resin {
+ linux,code = <KEY_VOLUMEDOWN>;
+ status = "okay";
+};
+
+&qupv3_id_0 {
+ status = "okay";
+};
+
+&remoteproc_adsp {
+ status = "okay";
+};
+
+&remoteproc_cdsp {
+ status = "okay";
+};
+
+&remoteproc_mpss {
+ status = "okay";
+};
+
+&rpm_requests {
+ regulators-0 {
+ compatible = "qcom,rpm-pm6125-regulators";
+
+ pm6125_s6: s6 {
+ regulator-min-microvolt = <304000>;
+ regulator-max-microvolt = <1456000>;
+ };
+
+ pm6125_s7: s7 {
+ regulator-min-microvolt = <1280000>;
+ regulator-max-microvolt = <2080000>;
+ };
+
+ pm6125_s8: s8 {
+ regulator-min-microvolt = <1064000>;
+ regulator-max-microvolt = <1304000>;
+ };
+
+ pm6125_l1: l1 {
+ regulator-min-microvolt = <952000>;
+ regulator-max-microvolt = <1152000>;
+ };
+
+ pm6125_l4: l4 {
+ regulator-min-microvolt = <488000>;
+ regulator-max-microvolt = <1000000>;
+ };
+
+ pm6125_l5: l5 {
+ regulator-min-microvolt = <1648000>;
+ regulator-max-microvolt = <2960000>;
+ regulator-allow-set-load;
+
+ regulator-always-on;
+ };
+
+ pm6125_l6: l6 {
+ regulator-min-microvolt = <576000>;
+ regulator-max-microvolt = <656000>;
+ };
+
+ pm6125_l7: l7 {
+ /* sdhci2 vdd-io-bias supply */
+ regulator-min-microvolt = <1256000>;
+ regulator-max-microvolt = <1256000>;
+
+ regulator-always-on;
+ };
+
+ pm6125_l8: l8 {
+ regulator-min-microvolt = <400000>;
+ regulator-max-microvolt = <728000>;
+ };
+
+ pm6125_l9: l9 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2000000>;
+ };
+
+ pm6125_l10: l10 {
+ regulator-min-microvolt = <1704000>;
+ regulator-max-microvolt = <1904000>;
+ };
+
+ pm6125_l11: l11 {
+ regulator-min-microvolt = <1768000>;
+ regulator-max-microvolt = <1952000>;
+ };
+
+ pm6125_l12: l12 {
+ regulator-min-microvolt = <1624000>;
+ regulator-max-microvolt = <1984000>;
+ };
+
+ pm6125_l13: l13 {
+ regulator-min-microvolt = <1504000>;
+ regulator-max-microvolt = <1952000>;
+ };
+
+ pm6125_l14: l14 {
+ regulator-min-microvolt = <1704000>;
+ regulator-max-microvolt = <1904000>;
+ };
+
+ pm6125_l15: l15 {
+ regulator-min-microvolt = <2920000>;
+ regulator-max-microvolt = <3232000>;
+ };
+
+ pm6125_l16: l16 {
+ regulator-min-microvolt = <1704000>;
+ regulator-max-microvolt = <1904000>;
+ };
+
+ pm6125_l17: l17 {
+ regulator-min-microvolt = <1152000>;
+ regulator-max-microvolt = <1384000>;
+ };
+
+ pm6125_l18: l18 {
+ regulator-min-microvolt = <1232000>;
+ regulator-max-microvolt = <1232000>;
+ };
+
+ pm6125_l19: l19 {
+ regulator-min-microvolt = <1624000>;
+ regulator-max-microvolt = <3304000>;
+ };
+
+ pm6125_l20: l20 {
+ regulator-min-microvolt = <1624000>;
+ regulator-max-microvolt = <3304000>;
+ };
+
+ pm6125_l21: l21 {
+ regulator-min-microvolt = <2400000>;
+ regulator-max-microvolt = <3600000>;
+ };
+
+ pm6125_l22: l22 {
+ regulator-min-microvolt = <2952000>;
+ regulator-max-microvolt = <2960000>;
+ regulator-allow-set-load;
+
+ regulator-always-on;
+ };
+
+ pm6125_l23: l23 {
+ regulator-min-microvolt = <3200000>;
+ regulator-max-microvolt = <3400000>;
+ };
+
+ pm6125_l24: l24 {
+ regulator-min-microvolt = <2704000>;
+ regulator-max-microvolt = <3600000>;
+ };
+ };
+};
+
+&sdhc_2 {
+ cd-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&sdc2_state_on>, <&sdc2_cd_on>;
+ pinctrl-1 = <&sdc2_state_off>, <&sdc2_cd_off>;
+ vmmc-supply = <&pm6125_l22>;
+ vqmmc-supply = <&pm6125_l5>;
+ /* No binding for vdd-io-bias on L7*/
+ no-sdio;
+ no-mmc;
+ status = "okay";
+};
+
+&sleep_clk {
+ clock-frequency = <32764>;
+};
+
+&spi2 {
+ status = "okay";
+};
+
+&tlmm {
+ gpio-reserved-ranges = <0 4>,<14 4>;
+
+ sdc2_cd_on: sdc2-cd-on-state {
+ pins = "gpio88";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+
+ sdc2_cd_off: sdc2-cd-off-state {
+ pins = "gpio88";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ lm3692x_bl_active: lm3692x-active-state {
+ pins = "gpio99";
+ function = "gpio";
+ drive-strength = <0x02>;
+ bias-pull-up;
+ };
+
+ mdss_dsi_active: mdss-dsi-active-state {
+ pins = "gpio85";
+ function = "gpio";
+ drive-strength = <8>;
+ bias-disable;
+ };
+
+ te_active: te-active-state {
+ pins = "gpio81";
+ function = "mdp_vsync";
+ drive-strength = <2>;
+ bias-pull-down;
+ };
+};
+
+&ufs_mem_hc {
+ vcc-supply = <&pm6125_l24>;
+ vcc-max-microamp = <600000>;
+ vccq2-supply = <&pm6125_l11>;
+ vccq2-max-microamp = <600000>;
+ vdd-hba-supply = <&pm6125_l18>;
+ status = "okay";
+};
+
+&ufs_mem_phy {
+ vdda-phy-supply = <&pm6125_l4>;
+ vdda-pll-supply = <&pm6125_l12>;
+ status = "okay";
+};
+
+&usb {
+ qcom,select-utmi-as-pipe-clk;
+ status = "okay";
+};
+
+&usb_dwc3 {
+ maximum-speed = "high-speed";
+ dr_mode = "peripheral";
+ /delete-property/ usb-role-switch;
+ phys = <&usb_hsphy>;
+ phy-names = "usb2-phy";
+ ports {
+ /delete-node/ port@1;
+ };
+};
+
+&usb_hsphy {
+ vdd-supply = <&pm6125_l4>;
+ vdda-pll-supply = <&pm6125_l12>;
+ vdda-phy-dpdm-supply = <&pm6125_l15>;
+ status = "okay";
+};
+
+/delete-node/ &usb_qmpphy;
+
+&xo_board {
+ clock-frequency = <19200000>;
+};

--
2.55.0