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Wed, 28 Oct 2026 22:06:36 -0700 (PDT) Received: from [127.0.1.1] ([169.211.140.146]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2eae6c9d2cesm28159685ad.65.2026.10.28.22.06.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Oct 2026 22:06:36 -0700 (PDT) From: Kwanghoon Son Date: Thu, 29 Oct 2026 01:05:46 -0400 Subject: [PATCH RFC 05/12] dt-bindings: serial: Add BL808 UART X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261029-rust-bl808-console-v1-5-b736ee920078@gmail.com> References: <20261029-rust-bl808-console-v1-0-b736ee920078@gmail.com> In-Reply-To: <20261029-rust-bl808-console-v1-0-b736ee920078@gmail.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Thomas Gleixner , Radu Rendec , Paul Walmsley , Samuel Holland , Palmer Dabbelt , Daniel Lezcano , Anup Patel , Kwanghoon Son , Albert Ou , Alexandre Ghiti , Greg Kroah-Hartman , Jiri Slaby Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Paul Walmsley , linux-riscv@lists.infradead.org, linux-serial@vger.kernel.org X-Mailer: b4 0.14.2 Describe the UART register range, interrupt and baud clock input. Initial Linux support targets the BL808 32-byte FIFO and reuses Zephyr's bflb,uart compatible. UART3 is D0 PLIC source 20. Link: https://docs.zephyrproject.org/latest/build/dts/api/bindings/serial/bflb,uart.html Signed-off-by: Kwanghoon Son --- .../devicetree/bindings/serial/bflb,uart.yaml | 57 ++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/bflb,uart.yaml b/Documentation/devicetree/bindings/serial/bflb,uart.yaml new file mode 100644 index 0000000000000000000000000000000000000000..df29d258f0a1c6d7bb283cf19c4157436991b64b --- /dev/null +++ b/Documentation/devicetree/bindings/serial/bflb,uart.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/serial/bflb,uart.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Bouffalo Lab UART Controller + +description: | + UART IP used by Bouffalo Lab SoCs. Initial Linux support covers the + BL808 controller with a 32-byte FIFO. The compatible follows Zephyr. + +maintainers: + - Kwanghoon Son + +allOf: + - $ref: serial.yaml# + +properties: + compatible: + const: bflb,uart + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Baud rate generator clock + + clock-names: + items: + - const: baud + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include + + uart3: serial@30002000 { + compatible = "bflb,uart"; + reg = <0x30002000 0x1000>; + interrupts = <20 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&uart_baud>; + clock-names = "baud"; + }; +... -- 2.47.3