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Tue, 14 Apr 2026 14:12:35 -0700 (PDT) Received: from strix.doe.home ([197.250.100.13]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43d73b44b3esm27652679f8f.13.2026.04.14.14.12.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Apr 2026 14:12:34 -0700 (PDT) From: =?UTF-8?q?Stefan=20D=C3=B6singer?= To: linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Arnd Bergmann , Krzysztof Kozlowski , Rob Herring Subject: [PATCH v3 7/8] ARM: dts: Declare UART1 on zx297520v3 boards Date: Wed, 15 Apr 2026 00:12:14 +0300 Message-ID: <20260414211215.152850-8-stefandoesinger@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260414211215.152850-1-stefandoesinger@gmail.com> References: <20260414211215.152850-1-stefandoesinger@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_141237_394518_FC568243 X-CRM114-Status: GOOD ( 13.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is the UART that sends Uboot messages and is accessible via pins on the boards I have seen so far. UART0 and UART2 exist as well, but don't have pins enabled by the bootloader. They will be added later. Signed-off-by: Stefan Dösinger --- arch/arm/boot/dts/zte/zx297520v3.dtsi | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/arm/boot/dts/zte/zx297520v3.dtsi b/arch/arm/boot/dts/zte/zx297520v3.dtsi index ecd07f3fb8b3..09fbb1d052e3 100644 --- a/arch/arm/boot/dts/zte/zx297520v3.dtsi +++ b/arch/arm/boot/dts/zte/zx297520v3.dtsi @@ -6,6 +6,10 @@ / { #address-cells = <1>; #size-cells = <1>; + aliases { + serial1 = &uart1; + }; + cpus { #address-cells = <1>; #size-cells = <0>; @@ -57,5 +61,23 @@ timer { */ arm,cpu-registers-not-fw-configured; }; + + /* The UART clock defaults to 26 mhz. It will be replaced when the zx29 clock + * framework is added. + */ + uartclk: uartclk: clock-26000000 { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <26000000>; + }; + + uart1: serial@1408000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x001feffe>; + reg = <0x01408000 0x1000>; + interrupts = ; + clocks = <&uartclk>; + clock-names = "apb_pclk"; + }; }; }; -- 2.52.0