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 AE550C433FE for ; Fri, 14 Jan 2022 09:17:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236834AbiANJRt (ORCPT ); Fri, 14 Jan 2022 04:17:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232626AbiANJRs (ORCPT ); Fri, 14 Jan 2022 04:17:48 -0500 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A5E7FC061574 for ; Fri, 14 Jan 2022 01:17:48 -0800 (PST) Received: by mail-pl1-x62d.google.com with SMTP id b3so3705709plc.7 for ; Fri, 14 Jan 2022 01:17:48 -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=FJ9jWVX1cVZCB+AdFkPwR6feqDBzuwKx9n9aDB+L7eU=; b=I2yvcth0kmZOxW74KiHSV0WxKJxUyNqtsCVuC3+JWwo9CpTjnYKAhYjNx+JMQR2X6O zmb4ao5EvvaOvpoyaFAHNSWRRjyx3SgRX6Q6aQ6OWC/BiiHQBmJkXWjjlXlLF87LtJae vvSEtbNxr4E1hLssV3cz822trWugBc6hG1XiT81y9V/9gw5O99sLMFJ/PQbou4w9hMYm 8caGnt1+98lhATlKi0v8eHzTWn9rY9KfvCCCNA7H4MwFsOMsBV+xvGJb02CL5qpvfiT+ F5v53Ja4zmjWIZRLGGwxmh9oI8lnrhKnxcjtU0evKie/DiVDH69Ik/RzhRkA5/CtV0WW TbXQ== 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=FJ9jWVX1cVZCB+AdFkPwR6feqDBzuwKx9n9aDB+L7eU=; b=zFkdKmgzUzOuX5c3vd1qWFhNst7eZrYOEeHL9FoTWlr1DRxXduVJ0+RBNEaJN9RA9U k08BfbQnEPzQpXo6hLL73fgWMiEmlX3a0azABEnc2JPY51YlhWN+G7CIqeyKkzY/WrOX uSCG4jZUfVtkYP2X/n6dtIMMW5Z62WHEcuqjKJEnssMHEWTsljdRZYjr8zVuQVEKcqBo fbtxuTcNX+2cc5LM1z05UT6qQFP0RhTR7M0b/E+SlOulEXp1WaZnZcLXvSTqX7JSrKHd boTfM9fiOc/NBeRy6AEX3u+3DkB7lGwCH4Zm4HjIqmfaAFWFC3/bDwo7aiTJEQ4fKL8u /J0g== X-Gm-Message-State: AOAM531bxpGqOUCgWkANRVO0CyFcmg5tE3D7udLkZiz7k4iyFU0m77FR WL9KJ6JEZgr71Tv3dS500uvSmg== X-Google-Smtp-Source: ABdhPJx75BSifsQTkjSXcEqinHM6jB1Blts8AJKZqvpt94lFvVTRer5DSG20FM2kQzE3HdQKFYRzWA== X-Received: by 2002:a17:902:c10c:b0:14a:922d:39d5 with SMTP id 12-20020a170902c10c00b0014a922d39d5mr457595pli.66.1642151868162; Fri, 14 Jan 2022 01:17:48 -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 z3sm4237179pgc.45.2022.01.14.01.17.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jan 2022 01:17:47 -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 v3 0/3] Determine the number of DMA channels by 'dma-channels' property Date: Fri, 14 Jan 2022 17:17:38 +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 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/Makefile | 2 ++ drivers/dma/sf-pdma/sf-pdma.c | 20 ++++++++++++------- drivers/dma/sf-pdma/sf-pdma.h | 8 ++------ 6 files changed, 26 insertions(+), 13 deletions(-) -- 2.31.1