init

2026-04-10 15:45:53 +04:00
commit 95f3f072da
24 changed files with 3526 additions and 0 deletions
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+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Surface Laptop 7 (Romulus) Surface Aggregator Module overlay.
+ * Connects the SAM EC to UART2 with hardware flow control.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#define IRQ_TYPE_EDGE_RISING 1
+
+/ {
+	compatible = "microsoft,romulus13", "microsoft,romulus15", "qcom,x1e80100";
+};
+
+&tlmm {
+	qup_uart2_default: qup-uart2-default-state {
+		pins = "gpio11", "gpio10", "gpio8", "gpio9";
+		function = "qup0_se2";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
+	sam_irq: sam-irq-state {
+		pins = "gpio91";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+		input-enable;
+	};
+};
+
+&uart2 {
+	status = "okay";
+
+	pinctrl-0 = <&qup_uart2_default>;
+	pinctrl-names = "default";
+
+	embedded-controller {
+		compatible = "microsoft,surface-sam";
+		interrupts-extended = <&tlmm 91 IRQ_TYPE_EDGE_RISING>;
+		current-speed = <4000000>;
+	};
+};