[PATCH v3 3/3] arm64: dts: qcom: sm8750-lenovo-elden: describe the WL2868C regulators

From: Qianhui Xu

Date: Fri Oct 30 2026 - 23:43:47 EST

The Lenovo Legion Tab (TB322FC) is an SM8750 tablet. Its camera
devices are powered by a WL2868C camera PMIC on i2c10: LDO1 feeds the
rear sensor DVDD, LDO2 the front sensor DVDD, LDO3 the front sensor
AVDD, LDO4 the rear sensor AVDD, LDO5 the VCM VDD, LDO7 the DOVDD of
both sensors and the VCM VDDIO, all at fixed voltages including the
offsets programmed by the stock firmware. LDO6 is not wired out on
this board.

The camera devices hang off the two CCI I2C controllers, which the
SM8750 dtsi does not describe yet, so add them alongside. The sensors
are described with their supplies only for now; the CSI endpoints
will be added together with the camera subsystem.

The board clocks (XO, sleep clock and the two divided CXO derivatives)
that the SM8750 dtsi consumes are described here, as done on the other
SM8750 boards, and the board compatible is added to qcom.yaml.

Signed-off-by: Qianhui Xu <xiaqinghuan@xxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/arm/qcom.yaml | 1 +
arch/arm64/boot/dts/qcom/Makefile | 1 +
.../boot/dts/qcom/sm8750-lenovo-elden.dts | 202 ++++++++++++++++++
arch/arm64/boot/dts/qcom/sm8750.dtsi | 112 ++++++++++
4 files changed, 316 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
index ff8a35df78..41d5e65c4e 100644
--- a/Documentation/devicetree/bindings/arm/qcom.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom.yaml
@@ -1168,6 +1168,7 @@ properties:

- items:
- enum:
+ - lenovo,elden
- qcom,sm8750-mtp
- qcom,sm8750-qrd
- const: qcom,sm8750
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1c86e7e98f..a18fea7beb 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -406,6 +406,7 @@ dtb-$(CONFIG_ARCH_QCOM) += sm8650-hdk-rear-camera-card.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8650-hdk.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8650-mtp.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8650-qrd.dtb
+dtb-$(CONFIG_ARCH_QCOM) += sm8750-lenovo-elden.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8750-mtp.dtb
dtb-$(CONFIG_ARCH_QCOM) += sm8750-qrd.dtb
dtb-$(CONFIG_ARCH_QCOM) += talos-evk.dtb
diff --git a/arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts b/arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts
new file mode 100644
index 0000000000..7bbc1986a8
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026, Qianhui Xu <xiaqinghuan@xxxxxxxxxxxxxxxx>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "sm8750.dtsi"
+
+/ {
+ model = "Lenovo Legion Y700 Gen4";
+ compatible = "lenovo,elden", "qcom,sm8750";
+ chassis-type = "tablet";
+
+ 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>;
+ };
+ };
+};
+
+&cci0 {
+ status = "okay";
+};
+
+&cci0_i2c0 {
+ clock-frequency = <400000>;
+
+ rear_lens: lens@c {
+ compatible = "giantec,gt9764";
+ reg = <0x0c>;
+ vddio-supply = <&camera_ldo7>;
+ vdd-supply = <&camera_ldo5>;
+ giantec,aac-mode = <0x40>;
+ giantec,aac-timing = <0x7c>;
+ settling-time-us = <7000>;
+ };
+
+ rear_camera: camera@56 {
+ compatible = "samsung,s5kjns";
+ reg = <0x56>;
+ clocks = <&cambistmclkcc CAM_BIST_MCLK_CC_MCLK3_CLK>;
+ assigned-clocks = <&cambistmclkcc CAM_BIST_MCLK_CC_MCLK3_CLK>;
+ assigned-clock-rates = <19200000>;
+ power-domains = <&camcc CAM_CC_TITAN_TOP_GDSC>;
+ reset-gpios = <&tlmm 11 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&rear_camera_default>;
+ dovdd-supply = <&camera_ldo7>;
+ dvdd-supply = <&camera_ldo1>;
+ avdd-supply = <&camera_ldo4>;
+ lens-focus = <&rear_lens>;
+ orientation = <1>;
+ rotation = <90>;
+ };
+};
+
+&cci1 {
+ status = "okay";
+};
+
+&cci1_i2c0 {
+ clock-frequency = <400000>;
+
+ front_camera: camera@31 {
+ compatible = "galaxycore,gc08a8";
+ reg = <0x31>;
+ clocks = <&cambistmclkcc CAM_BIST_MCLK_CC_MCLK4_CLK>;
+ assigned-clocks = <&cambistmclkcc CAM_BIST_MCLK_CC_MCLK4_CLK>;
+ assigned-clock-rates = <19200000>;
+ power-domains = <&camcc CAM_CC_TITAN_TOP_GDSC>;
+ reset-gpios = <&tlmm 7 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&front_camera_default>;
+ dovdd-supply = <&camera_ldo7>;
+ dvdd-supply = <&camera_ldo2>;
+ avdd-supply = <&camera_ldo3>;
+ orientation = <0>;
+ rotation = <270>;
+ };
+};
+
+&i2c10 {
+ status = "okay";
+
+ pmic@2f {
+ compatible = "willsemi,wl2868c";
+ reg = <0x2f>;
+ reset-gpios = <&tlmm 126 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&camera_pmic_default>;
+
+ regulators {
+ /* Voltages include the offsets programmed by stock firmware. */
+ camera_ldo1: ldo1 {
+ regulator-name = "camera_ldo1";
+ regulator-min-microvolt = <1128000>;
+ regulator-max-microvolt = <1128000>;
+ };
+
+ camera_ldo2: ldo2 {
+ regulator-name = "camera_ldo2";
+ regulator-min-microvolt = <1288000>;
+ regulator-max-microvolt = <1288000>;
+ };
+
+ camera_ldo3: ldo3 {
+ regulator-name = "camera_ldo3";
+ regulator-min-microvolt = <2816000>;
+ regulator-max-microvolt = <2816000>;
+ };
+
+ camera_ldo4: ldo4 {
+ regulator-name = "camera_ldo4";
+ regulator-min-microvolt = <2824000>;
+ regulator-max-microvolt = <2824000>;
+ };
+
+ camera_ldo5: ldo5 {
+ regulator-name = "camera_ldo5";
+ regulator-min-microvolt = <2808000>;
+ regulator-max-microvolt = <2808000>;
+ };
+
+ /* LDO6 is not wired out on this board. */
+ camera_ldo7: ldo7 {
+ regulator-name = "camera_ldo7";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ };
+ };
+};
+
+&tlmm {
+ gpio-reserved-ranges = <39 1>, <74 1>;
+
+ camera_pmic_default: camera-pmic-default-state {
+ pins = "gpio126";
+ function = "gpio";
+ bias-disable;
+ };
+
+ rear_camera_default: rear-camera-default-state {
+ mclk-pins {
+ pins = "gpio92";
+ function = "cam_mclk";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ reset-pins {
+ pins = "gpio11";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+ };
+
+ front_camera_default: front-camera-default-state {
+ mclk-pins {
+ pins = "gpio93";
+ function = "cam_aon_mclk4";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ reset-pins {
+ pins = "gpio7";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+ };
+};
diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
index dd738d13df..60b8f2fb5a 100644
--- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
@@ -3512,6 +3512,72 @@ camcc: clock-controller@ade0000 {
#power-domain-cells = <1>;
};

+ cci0: cci@ac7b000 {
+ compatible = "qcom,sm8750-cci", "qcom,msm8996-cci";
+ reg = <0x0 0x0ac7b000 0x0 0x1000>;
+ interrupts = <GIC_SPI 426 IRQ_TYPE_EDGE_RISING>;
+ power-domains = <&camcc CAM_CC_TITAN_TOP_GDSC>;
+ clocks = <&camcc CAM_CC_CAM_TOP_AHB_CLK>,
+ <&camcc CAM_CC_CCI_0_CLK>;
+ clock-names = "ahb", "cci";
+ assigned-clocks = <&camcc CAM_CC_CCI_0_CLK>;
+ assigned-clock-rates = <37500000>;
+ pinctrl-0 = <&cci0_0_default>;
+ pinctrl-1 = <&cci0_0_sleep>;
+ pinctrl-names = "default", "sleep";
+ status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cci0_i2c0: i2c-bus@0 {
+ reg = <0>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ cci0_i2c1: i2c-bus@1 {
+ status = "disabled";
+ reg = <1>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+
+ cci1: cci@ac7c000 {
+ compatible = "qcom,sm8750-cci", "qcom,msm8996-cci";
+ reg = <0x0 0x0ac7c000 0x0 0x1000>;
+ interrupts = <GIC_SPI 427 IRQ_TYPE_EDGE_RISING>;
+ power-domains = <&camcc CAM_CC_TITAN_TOP_GDSC>;
+ clocks = <&camcc CAM_CC_CAM_TOP_AHB_CLK>,
+ <&camcc CAM_CC_CCI_1_CLK>;
+ clock-names = "ahb", "cci";
+ assigned-clocks = <&camcc CAM_CC_CCI_1_CLK>;
+ assigned-clock-rates = <37500000>;
+ pinctrl-0 = <&cci1_0_default>;
+ pinctrl-1 = <&cci1_0_sleep>;
+ pinctrl-names = "default", "sleep";
+ status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cci1_i2c0: i2c-bus@0 {
+ reg = <0>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ cci1_i2c1: i2c-bus@1 {
+ status = "disabled";
+ reg = <1>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+
pdc: interrupt-controller@b220000 {
compatible = "qcom,sm8750-pdc", "qcom,pdc";
reg = <0x0 0x0b220000 0x0 0x10000>, <0x0 0x164400f0 0x0 0x64>;
@@ -4090,6 +4156,52 @@ qup_uart15_default: qup-uart15-default-state {
bias-pull-up;
};

+ cci0_0_default: cci0-0-default-state {
+ sda-pins {
+ pins = "gpio113";
+ function = "cci_i2c_sda";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+
+ scl-pins {
+ pins = "gpio114";
+ function = "cci_i2c_scl";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+ };
+
+ cci0_0_sleep: cci0-0-sleep-state {
+ pins = "gpio113", "gpio114";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-down;
+ };
+
+ cci1_0_default: cci1-0-default-state {
+ sda-pins {
+ pins = "gpio117";
+ function = "cci_i2c_sda";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+
+ scl-pins {
+ pins = "gpio118";
+ function = "cci_i2c_scl";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+ };
+
+ cci1_0_sleep: cci1-0-sleep-state {
+ pins = "gpio117", "gpio118";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-down;
+ };
+
sdc2_sleep: sdc2-sleep-state {
clk-pins {
pins = "sdc2_clk";
--
2.53.0