From patchwork Fri Jul 14 07:45:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Chen X-Patchwork-Id: 13313077 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 673C5EB64DA for ; Fri, 14 Jul 2023 07:46:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=N20iVCffDW6CkGIFIF9E6fpbG3fO+PLhK3nWFwsZP68=; b=bNYrHQt9gxw1Id lV23CV9MwBupFYitQvqju+ccMhwftmlI5Vdi27xgrom+s1UTluba8Va9Oj75EsYjGJFJmFReT1hTC dNq8awoRPoNfquAW6ECkxFnpKL+wY4VNzToEbOP11czqf4CXqAOuF169oBTWT6TmNsl+rcz10eTvl UZnk+ecj1sIny8Cz1RCnS3NXm9AFyN4rzT8V3qcpMbD6B2UslPxOQenjYqWsi6QGZRzQ7qmZzmGF/ UlNjtdkHgC1CAFhWlDcc3/b8bh+n0ljY8E3pF+AC2rF7Xj+0LSCv3zWqXH/aBCHIP535iqDrd/ZHU QXrFso4eh2rUY1VzVDpQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKDUm-005Lvx-1H; Fri, 14 Jul 2023 07:45:44 +0000 Received: from mail.aspeedtech.com ([211.20.114.72]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKDUg-005Ls2-1Q for linux-arm-kernel@lists.infradead.org; Fri, 14 Jul 2023 07:45:39 +0000 Received: from TWMBX02.aspeed.com (192.168.0.24) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 14 Jul 2023 15:45:24 +0800 Received: from aspeedtech.com (192.168.10.13) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 14 Jul 2023 15:45:24 +0800 From: Ryan Chen To: , Brendan Higgins , Benjamin Herrenschmidt , Joel Stanley , Rob Herring , Krzysztof Kozlowski , Andrew Jeffery , Philipp Zabel , Wolfram Sang , "Andy Shevchenko" , , Florian Fainelli , Jean Delvare , William Zhang , Tyrone Ting , Tharun Kumar P , Ryan Chen , Conor Dooley , "Phil Edworthy" , , , , , <=linux-kernel@vger.kernel.org>, Andi Shyti CC: Krzysztof Kozlowski Subject: [PATCH v12 1/2] dt-bindings: i2c: aspeed: support for AST2600-i2cv2 Date: Fri, 14 Jul 2023 15:45:21 +0800 Message-ID: <20230714074522.23827-2-ryan_chen@aspeedtech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230714074522.23827-1-ryan_chen@aspeedtech.com> References: <20230714074522.23827-1-ryan_chen@aspeedtech.com> MIME-Version: 1.0 Received-SPF: SoftFail (TWMBX02.aspeed.com: domain of transitioning ryan_chen@aspeedtech.com discourages use of 192.168.10.13 as permitted sender) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230714_004538_481062_14E35BC7 X-CRM114-Status: GOOD ( 10.02 ) 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 ast2600-i2cv2 compatible and aspeed,global-regs, aspeed,enable-dma and description for ast2600-i2cv2. Signed-off-by: Ryan Chen Reviewed-by: Krzysztof Kozlowski --- .../devicetree/bindings/i2c/aspeed,i2c.yaml | 51 +++++++++++++++++-- 1 file changed, 48 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml index 6df27b47b922..6c16fc76c978 100644 --- a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml @@ -9,9 +9,6 @@ title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs maintainers: - Rayn Chen -allOf: - - $ref: /schemas/i2c/i2c-controller.yaml# - properties: compatible: enum: @@ -49,12 +46,50 @@ properties: description: states that there is another master active on this bus + aspeed,enable-dma: + type: boolean + description: | + I2C bus enable dma mode transfer. + + ASPEED ast2600 platform equipped with 16 I2C controllers that share a + single DMA engine. DTS files can specify the data transfer mode to/from + the device, either DMA or programmed I/O. However, hardware limitations + may require a DTS to manually allocate which controller can use DMA mode. + The "aspeed,enable-dma" property allows control of this. + + In cases where one the hardware design results in a specific + controller handling a larger amount of data, a DTS would likely + enable DMA mode for that one controller. + + aspeed,global-regs: + $ref: /schemas/types.yaml#/definitions/phandle + description: The phandle of i2c global register node. + required: - reg - compatible - clocks - resets +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + - if: + properties: + compatible: + contains: + const: aspeed,ast2600-i2cv2 + + then: + properties: + reg: + minItems: 2 + required: + - aspeed,global-regs + else: + properties: + aspeed,global-regs: false + aspeed,enable-dma: false + unevaluatedProperties: false examples: @@ -71,3 +106,13 @@ examples: interrupts = <0>; interrupt-parent = <&i2c_ic>; }; + - | + #include + i2c1: i2c@80 { + compatible = "aspeed,ast2600-i2cv2"; + reg = <0x80 0x80>, <0xc00 0x20>; + aspeed,global-regs = <&i2c_global>; + clocks = <&syscon ASPEED_CLK_APB>; + resets = <&syscon ASPEED_RESET_I2C>; + interrupts = ; + };