From nobody Mon Oct 6 13:41:21 2025 Received: from TWMBX01.aspeed.com (mail.aspeedtech.com [211.20.114.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC45B191493; Tue, 22 Jul 2025 01:31:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.20.114.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753147893; cv=none; b=NH9uoVwparCUvlXKYp5oDnv7D6WogEBr4BRZb8pBWJ88U+511mmzPpMjsj7orl4R1FE8t/pnQZqaLQXCr12NW9I9PMtWxz45EcVSLuPsAB6z73Y61/No+uT0JjVJgy8Ba8Uw1FJYV9szFWW08OIWRFSylwLr5Bcz84uq2ymh1rM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753147893; c=relaxed/simple; bh=0CK9F2DV0mEKQY7orzMUVKoGEI8dBukCtuZke0pxzHo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tiuwqv6Yr+XHz1NW/ShJOBLnvfFfX0ZLf54TSfbnjUTIvcMRqzc6VZjnMr5z1tKUdtsoGD6TLKohPbiD0CDib2iyBN6A4Ky79ubDv//y9rC4faiSCyabTxeIFFtGk8mlwCh7Ql3o7xokiTr39iFa1TIpP6OZf96kSX3lyNQEEVs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aspeedtech.com; spf=pass smtp.mailfrom=aspeedtech.com; arc=none smtp.client-ip=211.20.114.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aspeedtech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aspeedtech.com Received: from TWMBX01.aspeed.com (192.168.0.62) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Tue, 22 Jul 2025 09:31:18 +0800 Received: from mail.aspeedtech.com (192.168.10.13) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1748.10 via Frontend Transport; Tue, 22 Jul 2025 09:31:18 +0800 From: Jammy Huang To: , , , , , , , , , CC: Krzysztof Kozlowski Subject: [PATCH v7 1/2] dt-bindings: mailbox: Add ASPEED AST2700 series SoC Date: Tue, 22 Jul 2025 09:31:16 +0800 Message-ID: <20250722013117.2561025-2-jammy_huang@aspeedtech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250722013117.2561025-1-jammy_huang@aspeedtech.com> References: <20250722013117.2561025-1-jammy_huang@aspeedtech.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce the mailbox module for AST27XX series SoC, which is responsible for interchanging messages between asymmetric processors. Signed-off-by: Jammy Huang Reviewed-by: Krzysztof Kozlowski Reviewed-by: Andrew Jeffery --- .../mailbox/aspeed,ast2700-mailbox.yaml | 68 +++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/aspeed,ast270= 0-mailbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/aspeed,ast2700-mailb= ox.yaml b/Documentation/devicetree/bindings/mailbox/aspeed,ast2700-mailbox.= yaml new file mode 100644 index 000000000000..600e2d63fccd --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/aspeed,ast2700-mailbox.yaml @@ -0,0 +1,68 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/aspeed,ast2700-mailbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ASPEED AST2700 mailbox controller + +maintainers: + - Jammy Huang + +description: > + ASPEED AST2700 has multiple processors that need to communicate with each + other. The mailbox controller provides a way for these processors to send + messages to each other. It is a hardware-based inter-processor communica= tion + mechanism that allows processors to send and receive messages through + dedicated channels. + + The mailbox's tx/rx are independent, meaning that one processor can send= a + message while another processor is receiving a message simultaneously. + There are 4 channels available for both tx and rx operations. Each chann= el + has a FIFO buffer that can hold messages of a fixed size (32 bytes in th= is + case). + + The mailbox controller also supports interrupt generation, allowing + processors to notify each other when a message is available or when an e= vent + occurs. + +properties: + compatible: + const: aspeed,ast2700-mailbox + + reg: + items: + - description: TX control register + - description: RX control register + + reg-names: + items: + - const: tx + - const: rx + + interrupts: + maxItems: 1 + + "#mbox-cells": + const: 1 + +required: + - compatible + - reg + - reg-names + - interrupts + - "#mbox-cells" + +additionalProperties: false + +examples: + - | + #include + + mailbox@12c1c200 { + compatible =3D "aspeed,ast2700-mailbox"; + reg =3D <0x12c1c200 0x100>, <0x12c1c300 0x100>; + reg-names =3D "tx", "rx"; + interrupts =3D ; + #mbox-cells =3D <1>; + }; --=20 2.25.1