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Tue, 21 Apr 2026 13:24:30 -0700 (PDT) From: =?utf-8?q?Stefan_D=C3=B6singer?= Date: Tue, 21 Apr 2026 23:23:15 +0300 Subject: [PATCH v5 7/8] ARM: dts: Declare UARTs on zx297520v3 boards Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260421-send-v5-7-ace038e63515@gmail.com> References: <20260421-send-v5-0-ace038e63515@gmail.com> In-Reply-To: <20260421-send-v5-0-ace038e63515@gmail.com> To: Jonathan Corbet , Shuah Khan , Russell King , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Arnd Bergmann , Krzysztof Kozlowski , Alexandre Belloni , Linus Walleij , Drew Fustini , Greg Kroah-Hartman , Jiri Slaby Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, soc@lists.linux.dev, linux-serial@vger.kernel.org, =?utf-8?q?Stefan_D=C3=B6singer?= X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; 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a=openpgp; fpr=4F9C2C8728019633893EBBB98CB81F9A72BBA155 Signed-off-by: Stefan Dösinger --- Changes since v4: * Declare all uarts * Remove the UART aliases for now. I can revisit this when I get my hands on a board that exposes two UARTs. --- arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts | 4 +++ arch/arm/boot/dts/zte/zx297520v3.dtsi | 39 ++++++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts b/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts index ac20215fddef..1700f46aba86 100644 --- a/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts +++ b/arch/arm/boot/dts/zte/zx297520v3-dlink-dwr932m.dts @@ -16,3 +16,7 @@ memory@20000000 { reg = <0x20000000 0x04000000>; }; }; + +&uart1 { + status = "okay"; +}; diff --git a/arch/arm/boot/dts/zte/zx297520v3.dtsi b/arch/arm/boot/dts/zte/zx297520v3.dtsi index 903050c684cb..ca65797ed926 100644 --- a/arch/arm/boot/dts/zte/zx297520v3.dtsi +++ b/arch/arm/boot/dts/zte/zx297520v3.dtsi @@ -20,6 +20,15 @@ cpu@0 { }; }; + /* Base bus clock and default for the UART. It will be replaced once a clock driver has + * been added. + */ + uartclk: uartclk: uartclk-26000000 { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <26000000>; + }; + timer { compatible = "arm,armv7-timer"; interrupts = , @@ -60,5 +69,35 @@ gic: interrupt-controller@f2000000 { reg = <0xf2000000 0x10000>, <0xf2040000 0x20000>; }; + + uart0: serial@131000 { + compatible = "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x00131000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; + + uart1: serial@1408000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x01408000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; + + uart2: serial@140d000 { + compatible = "arm,primecell"; + arm,primecell-periphid = <0x0018c011>; + reg = <0x0140d000 0x1000>; + interrupts = ; + clocks = <&uartclk>, <&uartclk>; + clock-names = "uartclk", "apb_pclk"; + status = "disabled"; + }; }; }; -- 2.53.0