From nobody Fri Apr 3 20:23:20 2026 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 34732386559; Tue, 24 Mar 2026 03:06:37 +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=1774321598; cv=none; b=jKS1YLMa8a4wVm6Sfiblr+uUyF9aNhtq12Q0NmR7hVIMm+Omw+tG/RXRK/ioSXlN0GhIG/7xgCntyzv0F+yWpfD7SPj36PIbESD+dpV9NGTf4Mi6aMh56q4mxF31yIzqyISDttDQcdoGFx7k0dQo/PfeddolNNX9mwoxDGagftQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774321598; c=relaxed/simple; bh=y16S4hcxAJwB0pyqLtb5Y4AIAVCk4wmOv1io+0cDITE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=kNAJYshjZM/wJPJdTWT75aY2kisc4/qipI7QaVruPQSoWtMb3IVmTX2xevx9RvElMhfGktVyS0Gt/+QBEeXTKxY9jDPxrZQZM+FbWhQrz9G6bKE470ahR1IkewNs5nM9BvldDxz+rHZfE3CeHoDRGN5Y7b3a/vpgLH1SupFjzQo= 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, 24 Mar 2026 11:06:26 +0800 Received: from [127.0.1.1] (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, 24 Mar 2026 11:06:26 +0800 From: Ryan Chen Date: Tue, 24 Mar 2026 11:06:26 +0800 Subject: [PATCH v27 1/4] dt-bindings: i2c: Split AST2600 binding into a new YAML Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260324-upstream_i2c-v27-1-f19b511c8c28@aspeedtech.com> References: <20260324-upstream_i2c-v27-0-f19b511c8c28@aspeedtech.com> In-Reply-To: <20260324-upstream_i2c-v27-0-f19b511c8c28@aspeedtech.com> To: , , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , "Benjamin Herrenschmidt" , Rayn Chen , Philipp Zabel CC: , , , , , , Ryan Chen X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1774321586; l=3549; i=ryan_chen@aspeedtech.com; s=20251126; h=from:subject:message-id; bh=y16S4hcxAJwB0pyqLtb5Y4AIAVCk4wmOv1io+0cDITE=; b=X7PmOCv8qkA/C7dUrbjSegfFY0JzZXJT15L9KUZ1G/8eCsoBBul6+s29UgeNprVDTmHPy+jRl hpAIOEJOB1kD//qQdWY2J+19hz38DeMYkayCA0ZY9DPp9OELGc7EHrL X-Developer-Key: i=ryan_chen@aspeedtech.com; a=ed25519; pk=Xe73xY6tcnkuRjjbVAB/oU30KdB3FvG4nuJuILj7ZVc= The AST2600 I2C controller introduces a completely new register layout with separate controller and target register blocks, unlike the mixed register layout used by AST2400/AST2500. Move AST2600 I2C binding from aspeed,i2c.yaml to a dedicated aspeed,ast2600-i2c.yaml schema. Besides the split, this also adjusts for AST2600-specific requirements. - require two reg regions (controller register block + buffer block) - use clock-frequency for bus speed description - interrupts are required on AST2600 - use correct DTS coding style in example No compatible strings are changed. Signed-off-by: Ryan Chen --- Changes in v26: - commit message: include details of changes from original binding - fix example property ordering to follow DTS coding style - use consistent "AST2600" naming --- .../bindings/i2c/aspeed,ast2600-i2c.yaml | 62 ++++++++++++++++++= ++++ .../devicetree/bindings/i2c/aspeed,i2c.yaml | 3 +- 2 files changed, 63 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml = b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml new file mode 100644 index 000000000000..de2c359037da --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/aspeed,ast2600-i2c.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ASPEED I2C on the AST2600 SoCs + +maintainers: + - Ryan Chen + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + enum: + - aspeed,ast2600-i2c-bus + + reg: + items: + - description: controller registers + - description: controller buffer space + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-frequency: + description: Desired operating frequency of the I2C bus in Hz. + minimum: 500 + maximum: 4000000 + default: 100000 + + resets: + maxItems: 1 + +required: + - reg + - compatible + - clocks + - resets + - interrupts + +unevaluatedProperties: false + +examples: + - | + #include + #include + i2c@80 { + compatible =3D "aspeed,ast2600-i2c-bus"; + reg =3D <0x80 0x80>, <0xc00 0x20>; + #address-cells =3D <1>; + #size-cells =3D <0>; + clocks =3D <&syscon ASPEED_CLK_APB>; + resets =3D <&syscon ASPEED_RESET_I2C>; + clock-frequency =3D <100000>; + interrupts =3D ; + }; diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml b/Docume= ntation/devicetree/bindings/i2c/aspeed,i2c.yaml index 5b9bd2feda3b..d4e4f412feba 100644 --- a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml @@ -4,7 +4,7 @@ $id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# =20 -title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs +title: ASPEED I2C on the AST24XX, AST25XX SoCs =20 maintainers: - Rayn Chen @@ -17,7 +17,6 @@ properties: enum: - aspeed,ast2400-i2c-bus - aspeed,ast2500-i2c-bus - - aspeed,ast2600-i2c-bus =20 reg: minItems: 1 --=20 2.34.1