[PATCH v4 4/4] arm64: dts: qcom: sm8750-lenovo-elden: describe the WL2868C regulators

[Qianhui Xu]

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. LDO2 and LDO3 are wired to
the front sensor, whose binding is still pending, so its node follows
with that series. LDO6 is not wired out on this board.

The rear camera hangs off cci0 with the VCM. The front camera hangs
off cci1 and arrives together with its binding.

i2c10 is a GENI I2C controller inside the qupv3_2 wrapper, so both
qupv3_2 and its gpi_dma2 parent are enabled alongside, otherwise
i2c10 never populates and the regulators would never register.

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; the board compatible was registered in the binding
patch of this series.

Signed-off-by: Qianhui Xu <xiaqinghuan@xxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/Makefile             |   1 +
 .../boot/dts/qcom/sm8750-lenovo-elden.dts     | 175 ++++++++++++++++++
 2 files changed, 176 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts

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..de186b4477
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts
@@ -0,0 +1,175 @@
+// 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>;
+		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>;
+
+		port {
+			rear_camera_ep: endpoint {
+				data-lanes = <1 2 3 4>;
+				link-frequencies = /bits/ 64 <672000000>;
+			};
+		};
+	};
+};
+
+&gpi_dma2 {
+	status = "okay";
+};
+
+&qupv3_2 {
+	status = "okay";
+};
+
+&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;
+		};
+	};
+};
-- 
2.53.0