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 53217C433FE for ; Mon, 17 Jan 2022 01:35:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236740AbiAQBfh (ORCPT ); Sun, 16 Jan 2022 20:35:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236680AbiAQBfe (ORCPT ); Sun, 16 Jan 2022 20:35:34 -0500 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBAE2C06173E for ; Sun, 16 Jan 2022 17:35:34 -0800 (PST) Received: by mail-pg1-x533.google.com with SMTP id q75so1479485pgq.5 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=5EXccvzY8Ey+0tvkm7NzpGwa82WtSyZNKjPN6AKkjVwy2aWjLtds+QQ04kuIUN2aZH 1F3lOPONl7lfWuLMcM2ugFCnxqXxyEqk2hf0cShhL0wZM1wAR3lkC9bEc7bIZ039bQ7v tbzFzshJ5wXzTjNb/hr6WOfZsoubLegZo18B2mY7enthRVjk5/D14Ac7VLaFXb+fo/Dj MURW8Q1uWa3h5s8DqALQx4BsU+bXDzsmdpI5zg/rpLT2m9juqDwq2ASyJjfvEaV2VQIA ymRj1vLbEfnift7m9+rT0k3IW06vqK6ty0p+sxnD2/nE7LWw7ZgECIKFS6t43+KqjHGI 3maA== X-Gm-Message-State: AOAM531zUEGKR6hmmQ8FiQusneMJS1MuPRgjHLJZsB4syz1NQqZ0GK6W 6Rd88jxHm+Ev9esfROZbPoT32w== 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: linux-kernel@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