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Mon, 21 Sep 2026 20:47:33 -0700 (PDT) Received: from hp ([71.12.40.102]) by smtp.gmail.com with ESMTPSA id 00721157ae682-8a2bd79e82bsm1822337b3.5.2026.09.21.20.47.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2026 20:47:33 -0700 (PDT) From: Tim Michals To: linux-sunxi@lists.linux.dev Cc: wens@kernel.org, jernej.skrabec@gmail.com, samuel@sholland.org, Tim Michals , Jassi Brar , Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/7] dt-bindings: mailbox: add Allwinner sun55i msgbox schema Date: Mon, 21 Sep 2026 22:47:05 -0500 Message-ID: <20260922034711.190253-2-tcmichals@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260922034711.190253-1-tcmichals@gmail.com> References: <20260922034711.190253-1-tcmichals@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260921_204735_986106_E442AF7E X-CRM114-Status: GOOD ( 14.57 ) 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 Add Device Tree binding schema for the Allwinner 4-port hardware Message Box controller found on sun55i (A523, A527, T527) and sun60i (A733) SoCs. The message box connects the ARM Cortex-A55 host cluster to the HiFi4 Audio DSP, Power Management Unit (CPUS), and XuanTie RISC-V co-processor across 12 logical channels with 8-entry hardware FIFOs. Cc: Jassi Brar Cc: Samuel Holland Cc: Jernej Skrabec Cc: Rob Herring Cc: Krzysztof Kozlowski Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-sunxi@lists.linux.dev Signed-off-by: Tim Michals --- .../mailbox/allwinner,sun55i-a523-msgbox.yaml | 93 +++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/allwinner,sun55i-a523-msgbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/allwinner,sun55i-a523-msgbox.yaml b/Documentation/devicetree/bindings/mailbox/allwinner,sun55i-a523-msgbox.yaml new file mode 100644 index 000000000000..4b73543c7902 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/allwinner,sun55i-a523-msgbox.yaml @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/allwinner,sun55i-a523-msgbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Allwinner sun55i 4-Port Message Box + +maintainers: + - Tim Michals + - Samuel Holland + +description: | + The hardware message box on sun55i (A523, A527, T527) and sun60i (A733) + SoCs is a 4-port multi-processor mailbox controller connecting the ARM + Cortex-A55 host cluster, HiFi4 Audio DSP, Power Management Unit (CPUS), + and XuanTie RISC-V co-processor. + + It features independent 256-byte register banks for each processor port, + 12 logical channels on the host (4 per remote processor), and 8-entry + hardware FIFOs with level interrupts. + +properties: + compatible: + enum: + - allwinner,sun55i-a523-msgbox + - allwinner,sun55i-t527-msgbox + - allwinner,sun60i-a733-msgbox + + reg: + minItems: 4 + maxItems: 4 + description: | + Register banks for each of the four processor ports. Each port has + an independent 256-byte register bank. + + reg-names: + items: + - const: arm + - const: dsp + - const: cpus + - const: rv + + clocks: + maxItems: 1 + description: bus clock + + resets: + maxItems: 1 + description: bus reset + + interrupts: + minItems: 1 + maxItems: 4 + description: | + One interrupt per processor port. The host port interrupt is required; + remote port interrupts are optional. + + '#mbox-cells': + const: 1 + description: "channel number (0-11: 0-3 CPUS, 4-7 DSP, 8-11 RISC-V)" + +required: + - compatible + - reg + - reg-names + - clocks + - resets + - interrupts + - '#mbox-cells' + +additionalProperties: false + +examples: + - | + #include + + mailbox@3003000 { + compatible = "allwinner,sun55i-a523-msgbox"; + reg = <0x03003000 0x1000>, + <0x07094000 0x1000>, + <0x07120000 0x1000>, + <0x07136000 0x1000>; + reg-names = "arm", "dsp", "cpus", "rv"; + clocks = <&ccu 120>; + resets = <&ccu 45>; + interrupts = , + , + , + ; + #mbox-cells = <1>; + }; + -- 2.53.0