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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C998C433F5 for ; Tue, 11 Jan 2022 08:51:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348972AbiAKIvj (ORCPT ); Tue, 11 Jan 2022 03:51:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348965AbiAKIvj (ORCPT ); Tue, 11 Jan 2022 03:51:39 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06666C06173F for ; Tue, 11 Jan 2022 00:51:39 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id n30-20020a17090a5aa100b001b2b6509685so4610457pji.3 for ; Tue, 11 Jan 2022 00:51:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9CyD9l+2ezhf6QjDxxdO63hYLgAiFV1ZYCShhusA3Zc=; b=EQGDnRWIzVflvRC1LoZBEca5vqEcilEfPy7CnUu3mLOtpkgy6w5pKahNh//E5U3xfQ crvEswdn9+Jw2nKpYnT1laOXAsAHj+ZsDHWXcC39ec83ibeSMG19vP1c8eGcX/PSrm0B xWWSpl3a6wyNpRIl+61dCj24l2FvXfWQLWevlOAfje9O4ZMVbw6yYNFEPn89DJjg3eFo 1wNVB9CBl9AFVAqxt1zDYzGICrZ4TKipIqU+2hDijnAK3GfZK7AiZ6+uBelBctFUN0wQ TX72hOMnbXnfHv316neSjDGnMl7KvIOiyovEZX3g9mnj+HGM+FS9atoldU5UeFftMSwQ fAVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9CyD9l+2ezhf6QjDxxdO63hYLgAiFV1ZYCShhusA3Zc=; b=e/Nf+ChNr1ngNk0gCrd85A7wggVqStGVP9PVvnXeWxOmyo2msNiTnBixRwWnGc5w/5 p72iC64VFqwv8KTD86Zl82fO0mbZGs5blKv5J46h8Cq1dknJybXgnlY4gIObdZ6tv1yh 7FKXFWRhR5d+dQ3bFGGZpQ8pfslNV3RmQnlaOS5VLImoGWRS1i2zqaSz0DuSUKdjQvr0 sv+5PR6thJ2AkS7iXh2FBhh4/rtWK5eEGW/Si/OOb7oasrEXaqxJJWK/xuKyfY50lx4t c0vIp7zVAVGZ9+Tu2DkNx9bgTsjjGnwHU6/TaOivESPNpfOXjWaXX5sbhT8VFeS98hNO dI1g== X-Gm-Message-State: AOAM530He6KdXAIKfoMOAWuruGVIJhpBSqGLP6xqD7UTQAg55n5MmZ6C o1WOCu3+E3xRratnH4TYR9prog== X-Google-Smtp-Source: ABdhPJwD+RQbLIRJC0BxCTDAflnidt5/NwF1Mtjccg6WfBOp5jBUvuu24w0KyQxWVGPNZVnK8Oba1w== X-Received: by 2002:a63:3e81:: with SMTP id l123mr3215398pga.41.1641891098542; Tue, 11 Jan 2022 00:51:38 -0800 (PST) Received: from hsinchu16.internal.sifive.com (59-124-168-89.hinet-ip.hinet.net. [59.124.168.89]) by smtp.gmail.com with ESMTPSA id j4sm9447598pfa.149.2022.01.11.00.51.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jan 2022 00:51:38 -0800 (PST) From: Zong Li To: robh+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, krzysztof.kozlowski@canonical.com, conor.dooley@microchip.com, geert@linux-m68k.org, bin.meng@windriver.com, green.wan@sifive.com, vkoul@kernel.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Cc: Zong Li Subject: [PATCH v2 0/3] Determine the number of DMA channels by 'dma-channels' property Date: Tue, 11 Jan 2022 16:51:24 +0800 Message-Id: X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The PDMA driver currently assumes there are four channels by default, it might cause the error if there is actually less than four channels. Change that by getting number of channel dynamically from device tree. For backwards-compatible, it uses the default value (i.e. 4) when there is no 'dma-channels' information in dts. This patch set contains the dts and dt-bindings change. Changed in v2: - Rebase on tag v5.16 - Use 4 as default value of dma-channels Zong Li (3): riscv: dts: Add dma-channels property in dma node dt-bindings: Add dma-channels for pdma device node dmaengine: sf-pdma: Get number of channel by device tree .../bindings/dma/sifive,fu540-c000-pdma.yaml | 7 +++++++ arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi | 1 + arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 1 + drivers/dma/sf-pdma/sf-pdma.c | 15 +++++++++------ drivers/dma/sf-pdma/sf-pdma.h | 8 ++------ 5 files changed, 20 insertions(+), 12 deletions(-) -- 2.31.1