linux-kernel - [PATCH] arm64: dts: cavium: thunder-88xx: Add missing PL011 "uartclk"

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Message-ID: <20251216180136.2794105-2-robh@kernel.org>
Date: Tue, 16 Dec 2025 12:01:37 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: soc@...nel.org,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: cavium: thunder-88xx: Add missing PL011 "uartclk"

The PL011 IP has 2 clock inputs for UART core/baud and APB bus. The
Thunder2 SoC is missing the core "uartclk". In this case, the Linux
driver uses single clock for both clock inputs. Let's assume that's how
the h/w is wired and make the DT reflect that.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
SoC maintainers, Please take this directly.

 arch/arm64/boot/dts/cavium/thunder-88xx.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi b/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
index cc860a80af51..70430cb2b053 100644
--- a/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
+++ b/arch/arm64/boot/dts/cavium/thunder-88xx.dtsi
@@ -401,16 +401,16 @@ uaa0: serial@...024000000 {
 			compatible = "arm,pl011", "arm,primecell";
 			reg = <0x87e0 0x24000000 0x0 0x1000>;
 			interrupts = <1 21 4>;
-			clocks = <&refclk50mhz>;
-			clock-names = "apb_pclk";
+			clocks = <&refclk50mhz>, <&refclk50mhz>;
+			clock-names = "uartclk", "apb_pclk";
 		};
 
 		uaa1: serial@...025000000 {
 			compatible = "arm,pl011", "arm,primecell";
 			reg = <0x87e0 0x25000000 0x0 0x1000>;
 			interrupts = <1 22 4>;
-			clocks = <&refclk50mhz>;
-			clock-names = "apb_pclk";
+			clocks = <&refclk50mhz>, <&refclk50mhz>;
+			clock-names = "uartclk", "apb_pclk";
 		};
 	};
 };
-- 
2.51.0