[PATCH v6 4/5] arm64: dts: qcom: sm8750-lenovo-elden: add the Lenovo Legion Y700 Gen4

[Qianhui Xu]

The Lenovo Legion Y700 Gen4 (TB322FC) is an SM8750 tablet. Add a board
devicetree with the board compatible, the chassis type, the GPIOs the
boot firmware reserves and the board clocks, which the SM8750 dtsi
consumes: the XO and sleep clocks and the two divided CXO derivatives,
as on the other SM8750 boards.

The rest of the board enablement (SPMI PMICs, console and storage)
cannot be validated on hardware yet and is left to a separate board
series. The camera PMIC and the regulators it provides follow in the
next patch.

Signed-off-by: Qianhui Xu <xiaqinghuan@xxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/Makefile             |  1 +
 .../boot/dts/qcom/sm8750-lenovo-elden.dts     | 50 +++++++++++++++++++
 2 files changed, 51 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 88230c4e00..e0b65a36c5 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -453,6 +453,7 @@ 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)	+= sm8650-valve-deckard.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..821950715c
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm8750-lenovo-elden.dts
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026, Qianhui Xu <xiaqinghuan@xxxxxxxxxxxxxxxx>
+ */
+
+/dts-v1/;
+
+#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>;
+		};
+	};
+};
+
+&tlmm {
+	gpio-reserved-ranges = <39 1>, <74 1>;
+};
-- 
2.53.0