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 DFAF0C433F5 for ; Mon, 17 Jan 2022 01:35:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232733AbiAQBfg (ORCPT ); Sun, 16 Jan 2022 20:35:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60962 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233906AbiAQBfe (ORCPT ); Sun, 16 Jan 2022 20:35:34 -0500 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8B76C061574 for ; Sun, 16 Jan 2022 17:35:34 -0800 (PST) Received: by mail-pg1-x532.google.com with SMTP id g2so9202823pgo.9 for ; Sun, 16 Jan 2022 17:35:34 -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=p5VfPZXhTB1Gitf1/abkH4dtjlhx6yCzyBbwzkYPtDE=; b=nuEGBewfX2D4CBsw5hzzXDBRybGp50VAcaPLK0Bqr/3r2gDlgyUhoDa01Y75lMtU4R ZsqZtEl/sbAcUqB9SJYhkfasbFUOOp6jKKaBBeKAEC4P1f6pataPMUxT76rMe6VnGxnE bxWI36FkiT/2N2I4+m/qFkrI3+iiAaY0rSbiG6Jp9qMbzoNCVRxeVNeGzh1iZxFnnKLa xXrj9gowNzNXtyIaGxcZlx0cz/zZM0r/4g5P1T8FcZDwusYWq3P64BtvYD7EvrOg7PEy 1lMmj1YjI+E9v4/poeZIQqxDWdeoV0xpkV4rAZTGGF7PQ3wAFQkz0l4UDRJWSuMzrkb+ hXUQ== 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=p5VfPZXhTB1Gitf1/abkH4dtjlhx6yCzyBbwzkYPtDE=; b=yv4FGurMb9mQyq8+4l8C/go5gBVfkv8AlWN/8FqDBVBucT83N11jYSwVr7MlxlLx6r yY5y6yXOEMNQk6kRg/BYo06O595stOS4cirmqAAsfeTCip9e3JjTcm55zp8XHHKBXbFj r8EgmAYQEIjhY2aUEFoySsBH1s92ugAFhETexa7u2xZjycCsOfnKYJCLi0zSz03sSPOm npbdPKGeSKMpyyUvCLNYqM+GxwuQE8a0FkaU0/oEZEDG0DApVsxpisNOd/gPnEY3cXmm oAUE+Z1WxCbV8r+ZmLPJ2kkMTcrlpUdfH2wbOBxfHWHG654bqOw7sw7mYuiEOyHLZzSt agQw== X-Gm-Message-State: AOAM530va+WemJ76SwPuEXiAJIRIOBXIBYSpoSOpURq/1WzzVjJw4zf1 o3AXplQcuDsMzrNg7Q8KFCcu1Q== X-Google-Smtp-Source: ABdhPJxLIYeShTzCQNAuiqhv+woORrPiGiFg3PY5eGHPTWu8DqZgmWT1wWUIlKvDczvdCAZbTZ+aQg== X-Received: by 2002:a63:83c8:: with SMTP id h191mr9624306pge.499.1642383334271; Sun, 16 Jan 2022 17:35:34 -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 l1sm10008335pgn.35.2022.01.16.17.35.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 16 Jan 2022 17:35:33 -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 v4 0/3] Determine the number of DMA channels by 'dma-channels' property Date: Mon, 17 Jan 2022 09:35:25 +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: 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 v4: - Remove cflags of debug use reported-by: kernel test robot Changed in v3: - Fix allocating wrong size - Return error if 'dma-channels' is larger than maximum 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 +++++++ .../boot/dts/microchip/microchip-mpfs.dtsi | 1 + arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 1 + drivers/dma/sf-pdma/sf-pdma.c | 20 ++++++++++++------- drivers/dma/sf-pdma/sf-pdma.h | 8 ++------ 5 files changed, 24 insertions(+), 13 deletions(-) -- 2.31.1