From patchwork Mon Feb 24 05:59:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Chen X-Patchwork-Id: 13987432 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 EB968C021B3 for ; Mon, 24 Feb 2025 06:03:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:To:From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=SmOGtJnwvXAm2XsZztdte1SqP5W8S3VZiQDWEkQ4xoM=; b=H1h3bq4VtmILwhIersKeAaMJ3o U5q/U+O77vY+5rMzFaVkJNNzhDkjOXo5pWy+3axdL0xazBoLqD7DM+eAExEqXAA1JhQCNcQSzzef9 cZg78+ArWbPwjaJuWQe/E6cfOaA18Dolu09Xt0VS+gbqgY2yJEALqn6hOJN2lXMByhXrnDo/3Qywh 4gKxh7Jj0R82aD63gPFC4h5nTvAoV5vSMLSnVS/jhksOsRRp6slrqwY9VXezfsQiTwULq7BZw7LMi +t3B7WrysKY4qG1iE8i/46v5vu3F6uPEByf1e23gy5jg5/Chj+X+B5cuW9M6T6wp38mmSsEHt5Fn+ IAkonYRA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tmRYQ-0000000CP62-3gyX; Mon, 24 Feb 2025 06:02:58 +0000 Received: from mail.aspeedtech.com ([211.20.114.72] helo=TWMBX01.aspeed.com) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tmRVO-0000000COgS-43AQ for linux-arm-kernel@lists.infradead.org; Mon, 24 Feb 2025 05:59:52 +0000 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 15.2.1258.12; Mon, 24 Feb 2025 13:59:36 +0800 Received: from twmbx02.aspeed.com (192.168.10.13) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1258.12 via Frontend Transport; Mon, 24 Feb 2025 13:59:36 +0800 From: Ryan Chen To: , , , , , , , , , , , , , , , Subject: [PATCH v16 1/3] dt-bindings: i2c: aspeed: support for AST2600-i2cv2 Date: Mon, 24 Feb 2025 13:59:34 +0800 Message-ID: <20250224055936.1804279-2-ryan_chen@aspeedtech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250224055936.1804279-1-ryan_chen@aspeedtech.com> References: <20250224055936.1804279-1-ryan_chen@aspeedtech.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250223_215951_001292_76CFE099 X-CRM114-Status: UNSURE ( 9.57 ) X-CRM114-Notice: Please train this message. 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 --- .../devicetree/bindings/i2c/aspeed,i2c.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml index 5b9bd2feda3b..356033d18f90 100644 --- a/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml @@ -44,12 +44,60 @@ properties: description: frequency of the bus clock in Hz defaults to 100 kHz when not specified + multi-master: + type: boolean + 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,enable-byte: + type: boolean + description: | + I2C bus enable byte mode transfer. + + 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: @@ -66,3 +114,13 @@ 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 = ; + };