linux-kernel - [PATCH v1] arm64: dts: exynos: r8s: enable UART interfaces and aliases

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Message-Id: <20250213000226.277-1-wachiturroxd150@gmail.com>
Date: Thu, 13 Feb 2025 00:02:26 +0000
From: Denzeel Oliva <wachiturroxd150@...il.com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	alim.akhtar@...sung.com,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Denzeel Oliva <wachiturroxd150@...il.com>
Subject: [PATCH v1] arm64: dts: exynos: r8s: enable UART interfaces and aliases

 - usi_uart: Main UART interface, required for debugging or
   communication.
 - usi_bt_uart: UART interface for Bluetooth connectivity.
 - Added serial0 and serial1 aliases for standard UART access.

Signed-off-by: Denzeel Oliva <wachiturroxd150@...il.com>
---
 arch/arm64/boot/dts/exynos/exynos990-r8s.dts | 23 ++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos990-r8s.dts b/arch/arm64/boot/dts/exynos/exynos990-r8s.dts
index 6bae3c0ec..049b40af2 100644
--- a/arch/arm64/boot/dts/exynos/exynos990-r8s.dts
+++ b/arch/arm64/boot/dts/exynos/exynos990-r8s.dts
@@ -18,6 +18,11 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	aliases {
+		serial0 = &serial_0;
+		serial1 = &serial_1;
+	};
+
 	chosen {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -113,3 +118,21 @@ key_volup: key-volup-pins {
 		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
 	};
 };
+
+&usi_uart {
+	samsung,clkreq-on; /* needed for UART mode */
+	status = "okay";
+};
+
+&serial_0 {
+	status = "okay";
+};
+
+&usi_bt_uart {
+	samsung,clkreq-on; /* needed for UART mode */
+	status = "okay";
+};
+
+&serial_1 {
+	status = "okay";
+};
-- 
2.48.1