From patchwork Thu Oct 10 14:27:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 13830352 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 5F350CF11F9 for ; Thu, 10 Oct 2024 14:47:15 +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=3tg5heSL9K2PVAn49c6WcA9lpmDYzguhmN52wf4h1Nw=; b=wia0JnEphCCxYl13z8GshikjIh fGMIVllksuGKxZIKXNJvVKsd6J+w8MvUPsIvVl+kokUOtu1hQo7UHnyzPgP8RynrAm7C61//MnUHp KUwF/zwJ+8P7Hi3554Kjhx0kr6yO0iKBgTslmfhVl1uN7FdlRKFnlnkRrQrjRuF8Qkx3+pR/j7Nhk rwfVc0AALL9FJXa8N7OifxqE0ROq8iQ/Mn2/CTBlawc9MlnFnF8xQ+jqeU7Qwiz8jXbxoWVkKuJUG NNIupPW5VC7Z0CbiiYG69Ge9/SGHTazAmeUVL5Bz0phNmipOAkChnZAFBHIbwJhosG7iLqONSp3L7 T8h3nk9g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1syuRT-0000000DBGp-02EA; Thu, 10 Oct 2024 14:47:03 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1syuCb-0000000D75E-2Opb for linux-arm-kernel@lists.infradead.org; Thu, 10 Oct 2024 14:31:43 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49AEBqR0015320; Thu, 10 Oct 2024 16:31:35 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= 3tg5heSL9K2PVAn49c6WcA9lpmDYzguhmN52wf4h1Nw=; b=FC+P2JHhQ0B2FzuZ OhFNJ6mHadbx4tePNYTJbVUkK9gqv13OlzwwQ5p+B8Bz5hsgAPkMZ0oqXlnGjX1Q /Z62ZNXdPJjrQpXwZ1slzmkLOHNP81QD7uBC7UV9Ez4QWNLDT/wHpGly2xxCKSSe jSJ25n6vCHu6M3Y9pjjb4aEV/bZZcVuYFqDBMJZiCnLKUUyMFYGBCWxAbIrVGXg/ igMwMXu8R0L8oAbrNZmKWW9yGnRPMJCLSuEgk1ftyVTP08XzflZFrgPCwDKqMPoH z5JUORT7YuazqpBhsPzMTRuaL0v0tA853+1/Jt3S8i1WtzfRZwZDleqCI8Qk7I/P WAvSEg== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 425q97xxb8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 10 Oct 2024 16:31:35 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 1C02740063; Thu, 10 Oct 2024 16:30:22 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node3.st.com [10.75.129.71]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 1CC0229ADCD; Thu, 10 Oct 2024 16:28:11 +0200 (CEST) Received: from localhost (10.252.31.182) by SHFDAG1NODE3.st.com (10.75.129.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Thu, 10 Oct 2024 16:28:10 +0200 From: Amelie Delaunay Date: Thu, 10 Oct 2024 16:27:56 +0200 Subject: [PATCH 06/11] dt-bindings: dma: stm32-dma3: introduce st,axi-max-burst-len property MIME-Version: 1.0 Message-ID: <20241010-dma3-mp25-updates-v1-6-adf0633981ea@foss.st.com> References: <20241010-dma3-mp25-updates-v1-0-adf0633981ea@foss.st.com> In-Reply-To: <20241010-dma3-mp25-updates-v1-0-adf0633981ea@foss.st.com> To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue CC: , , , , , Amelie Delaunay X-Mailer: b4 0.14.2 X-Originating-IP: [10.252.31.182] X-ClientProxiedBy: SHFCAS1NODE1.st.com (10.75.129.72) To SHFDAG1NODE3.st.com (10.75.129.71) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241010_073142_024243_57203331 X-CRM114-Status: GOOD ( 10.01 ) 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 DMA3 maximum burst length (in unit of beat) may be restricted depending on bus interconnect. As mentionned in STM32MP2 reference manual [1], "the maximum allowed AXI burst length is 16. The user must set [S|D]BL_1 lower or equal to 15 if the Source/Destination allocated port is AXI (if [S|D]AP=0)". Introduce st,axi-max-burst-len. If used, it will clamp the burst length to that value if AXI port is used, if not, the maximum burst length value supported by DMA3 is used. [1] https://www.st.com/resource/en/reference_manual/rm0457-stm32mp2325xx-advanced-armbased-3264bit-mpus-stmicroelectronics.pdf Signed-off-by: Amelie Delaunay --- .../devicetree/bindings/dma/stm32/st,stm32-dma3.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml index 38c30271f732e0c8da48199a224a88bb647eeca7..90ad70bb24eb790afe72bf2085478fa4cec60b94 100644 --- a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml +++ b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml @@ -51,6 +51,16 @@ properties: power-domains: maxItems: 1 + st,axi-max-burst-len: + description: | + Restrict AXI burst length in unit of beat by value specified in this property. + The value specified in this property is clamped to the maximum burst length supported by DMA3. + If this property is missing, the maximum burst length supported by DMA3 is used. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 256 + default: 64 + "#dma-cells": const: 3 description: | @@ -137,5 +147,6 @@ examples: ; clocks = <&rcc CK_BUS_HPDMA1>; #dma-cells = <3>; + st,axi-max-burst-len = <16>; }; ...