From mboxrd@z Thu Jan 1 00:00:00 1970 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 9A7FECD98C6 for ; Thu, 11 Jun 2026 05:31:46 +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:CC:To:In-Reply-To:References :Message-ID:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dJ0ypID1O9Q93DezS4iROQXKtdNNTDRs5MtDYM7giKY=; b=KbIaAOqn0TdnUrVziHFug8LJqZ wLUAHz6NRaQRjNRzSffSWvQTyrXnDkBy3WxkJWDk6NnIG47OJDd7AxCKZ/zqZdsyXrOOtPKShBTs0 L+C79PmQSf0KNokER9RTb8aO7Oan3IBn+QC3YliABY9VfoA6ZMxC0fGUWJ7K/whnJl78vgbg9yk+u sqd2kzeV3dyrFQ/Hhjjf1KDMOMKPr9tJMuNvjf32HJ3EwqStfmOOvE76TY7qfXK9ILO41vIRjyJiS a2uVu2vD2tFC874oys4rS8LOFI3juLYXcKho0WaBq1zqYHPLasNRP+/GExecvk+Co4FuNCnwjnxHY tYmIuWHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wXY0x-00000008jy0-14g6; Thu, 11 Jun 2026 05:31:39 +0000 Received: from mail.aspeedtech.com ([211.20.114.72] helo=twmbx01.aspeedtech.com) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wXY0s-00000008jtr-1x9J for linux-arm-kernel@lists.infradead.org; Thu, 11 Jun 2026 05:31:35 +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 15.2.1748.10; Thu, 11 Jun 2026 13:31:22 +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; Thu, 11 Jun 2026 13:31:22 +0800 From: Ryan Chen Date: Thu, 11 Jun 2026 13:31:23 +0800 Subject: [PATCH v32 3/5] dt-bindings: i2c: ast2600-i2c.yaml: Add global-regs properties MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20260611-upstream_i2c-v32-3-b66eba921d01@aspeedtech.com> References: <20260611-upstream_i2c-v32-0-b66eba921d01@aspeedtech.com> In-Reply-To: <20260611-upstream_i2c-v32-0-b66eba921d01@aspeedtech.com> To: , , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , "Benjamin Herrenschmidt" , Rayn Chen , Philipp Zabel CC: , , , , , , Ryan Chen , Conor Dooley X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1781155882; l=3063; i=ryan_chen@aspeedtech.com; s=20251126; h=from:subject:message-id; bh=r2T5rQ6TN/II/E6wQiYvjiwSm3+xG1X8ZJATJXCx5iE=; b=AlS4OvZRWj5Vy4mXQ6/Xq3RTtvL57/E0g/GuLDwWSJ8lmRKiCPDoCyI7hbOtA13jHgnnaYltH Ol0jpJIWHh1Bu0IYUraFf6oaVlERw9QLRXSaR0j8mKBx+Hqv+MgmTbT X-Developer-Key: i=ryan_chen@aspeedtech.com; a=ed25519; pk=Xe73xY6tcnkuRjjbVAB/oU30KdB3FvG4nuJuILj7ZVc= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260610_223134_508168_715C13E7 X-CRM114-Status: GOOD ( 10.68 ) 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 the aspeed,global-regs phandle to reference the AST2600 global registers syscon node, containing the SoC-common I2C register set. These properties apply only to the AST2600 binding. Legacy DTs remain unchanged. Acked-by: Conor Dooley Reviewed-by: Rob Herring (Arm) Signed-off-by: Ryan Chen --- Changes in v32: - Add if/then conditional schema: when aspeed,global-regs is present, require reg to have at least two items. The new driver unconditionally maps resource index 1 (the buffer SRAM region); a DT with one reg entry and aspeed,global-regs passes schema validation but fails probe. The constraint makes the schema consistent with driver behaviour. - Fix binding example to use the correct AST2600 clock header (ast2600-clock.h) and ASPEED_CLK_APB2 instead of the legacy aspeed-clock.h, where index 26 (ASPEED_CLK_APB) maps to the UART5 gate clock on AST2600 rather than the APB2 bus clock used by the I2C controller. Changes in v29: - remove aspeed,enable-dma properties. Changes in v28: - update commit message correspond with aspeed,enable-dma. - remove aspeed,transfer-mode and add aspeed,enable-dma property and description. - Fix aspeed,enable-dma description to reflect hardware capability rather than software behavior Changes in v27: - change aspeed,transfer-mode to aspeed,enable-dma. --- .../devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml index abc614315dff..eb6e316c112f 100644 --- a/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml @@ -48,6 +48,12 @@ properties: resets: maxItems: 1 + aspeed,global-regs: + $ref: /schemas/types.yaml#/definitions/phandle + description: + Phandle reference to the i2c global syscon node, containing the + SoC-common i2c register set. + required: - reg - compatible @@ -55,19 +61,28 @@ required: - resets - interrupts +if: + required: + - aspeed,global-regs +then: + properties: + reg: + minItems: 2 + unevaluatedProperties: false examples: - | - #include + #include #include i2c@80 { compatible = "aspeed,ast2600-i2c-bus"; reg = <0x80 0x80>, <0xc00 0x20>; #address-cells = <1>; #size-cells = <0>; - clocks = <&syscon ASPEED_CLK_APB>; + clocks = <&syscon ASPEED_CLK_APB2>; resets = <&syscon ASPEED_RESET_I2C>; clock-frequency = <100000>; interrupts = ; + aspeed,global-regs = <&i2c_global>; }; -- 2.34.1