From patchwork Tue Jan 11 08:51:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zong Li X-Patchwork-Id: 12709631 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 1B02FC433EF for ; Tue, 11 Jan 2022 08:51:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348981AbiAKIvj (ORCPT ); Tue, 11 Jan 2022 03:51:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236783AbiAKIvj (ORCPT ); Tue, 11 Jan 2022 03:51:39 -0500 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1460FC061748 for ; Tue, 11 Jan 2022 00:51:39 -0800 (PST) Received: by mail-pj1-x102e.google.com with SMTP id lr15-20020a17090b4b8f00b001b19671cbebso4625265pjb.1 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=HSuexzHJ1nbLms1BonDg9iWsFXeUXUw+WsJKBS3tyDDnLLfRLdS8SaSlLrEX9q1GPz MhErUQFAcPgeyRg7tDyrPtFXpzIEJ/gegVYEJpzoJ4A1/3v2JAupfVpKGrW0RMu2oceS ZaCSr+f+wR4hV5teRKi/Z/u1B5beo9ZypN0jo+4M6oHTYTFNAiojxBZWKIF1dlIUzxCd BEIlDXXyE2RIFkFovArS5rRQyQk7jTY5QSsoqtzM1LwDKA9roOVJIcZzmfO04Wv6JtDE AEFA9P3Nj/sAhVJUvhoqgwnv04oxlSxbbVgF+V1iCneAq+EnyHZQ0yt4dtBVIVHYxUWe vUMQ== X-Gm-Message-State: AOAM533BVG+OQptu+NOrK4SEerIYGFeL1LsN2LuGDK5OszObPBvmj1uO OzkXUW0JdzLEjddKAWdpc4YiPw== 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 Precedence: bulk List-ID: X-Mailing-List: dmaengine@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(-)