From patchwork Mon Mar 7 05:44:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zong Li X-Patchwork-Id: 12771180 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 0A59BC433EF for ; Mon, 7 Mar 2022 05:44:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235369AbiCGFp1 (ORCPT ); Mon, 7 Mar 2022 00:45:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235364AbiCGFp0 (ORCPT ); Mon, 7 Mar 2022 00:45:26 -0500 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9597D4A930 for ; Sun, 6 Mar 2022 21:44:32 -0800 (PST) Received: by mail-pf1-x434.google.com with SMTP id p8so12792368pfh.8 for ; Sun, 06 Mar 2022 21:44:32 -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=YWajgjcCCrnsZSF3IfZMfbxzzFZcQpbBns1alayx99E=; b=cGSKTJZ3Kh0Ek+WCmI4HffDYMUe79KY/em0iV2NUNCazJjGDuknQdSzpMZoSaLZmTW MWFW28V2UbmFQKm/k3VUesxpUIBWzAjLzi2WcDEab8uTZuIAd1MQjyvECjNRKr9+ruFH FNTKNGnEfcD1KYvDQ9idr3ukmIYhMRFgqGmexUFgyYHjJYbadhBDKkIE0L7DsSnD3Zjv HykdLhbEQaupRwNLgPP4ZSdjV/Qo0IALd4wiaDRaNm9bd7ahZWuGrIGpL+yhLbnJXgSS x0PUdKL3Kbe0fk3XC/83eJgP6jMQ0WpG489XH/88h9sIiLD0iO4AXz0cNoq3fnbBgbeT s7qA== 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=YWajgjcCCrnsZSF3IfZMfbxzzFZcQpbBns1alayx99E=; b=lJrEiZW3vtsA52jzvEEY1Z6++7hD1aDU8mc1jcKIKN5mKJHIsoaC5fhFiFt0c90ydm noI2MssNY7x3vaX+5KJTtKfxcA1mW9l8CVI5zyrkRED/es3TQvhrZeIkzuH2eHhhLegb 3FmxSKOTRsMFJj/I+CwiqD8pyxBZLQ3kQld9b9cbec7zhh8A5NuTUR7o2/YP5mTQjJ+C CZleOeHpePaWUIlPceqbtJExiH9e28mman02JV9BctlFrRjA5Bd7JUuuL6vMc4iC/MnU qbHkPv2nSAUTla3Qkou4UplY2Yayla6xa5CdcK84XPYVZbyHxfdBiODtCyi1lrjWOp8O Xlxw== X-Gm-Message-State: AOAM533+zFkFUFPy/s0xVRJZAQemNS2hKpKuCFFN6MhwzgJ+AQ+HE0VV UiZXTW9zAiP5PzYWRnLuAI02wQ== X-Google-Smtp-Source: ABdhPJwnA3KEBp7KJP4Dkadosl1pu/fl5hoM+iRWl2JxYsBzf8nK0VH8nGH8sx7PD9Mes5im6f4iZg== X-Received: by 2002:a05:6a00:1a09:b0:4e1:67a7:2c87 with SMTP id g9-20020a056a001a0900b004e167a72c87mr11135766pfv.37.1646631872090; Sun, 06 Mar 2022 21:44:32 -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 k1-20020a056a00168100b004e0e45a39c6sm14447385pfc.181.2022.03.06.21.44.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Mar 2022 21:44:31 -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 v7 0/3] Determine the number of DMA channels by 'dma-channels' property Date: Mon, 7 Mar 2022 13:44:23 +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 v7: - Rebase on tag v5.17-rc7 - Modify the subject of patch Changed in v6: - Rebase on tag v5.17-rc6 - Change sf_pdma.chans[] to a flexible array member. Changed in v5: - Rebase on tag v5.17-rc3 - Fix typo in dt-bindings and commit message - Add PDMA versioning scheme for compatible 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): dt-bindings: dma-engine: sifive,fu540: Add dma-channels property and modify compatible riscv: dts: Add dma-channels property and modify compatible dmaengine: sf-pdma: Get number of channel by device tree .../bindings/dma/sifive,fu540-c000-pdma.yaml | 19 +++++++++++++-- .../boot/dts/microchip/microchip-mpfs.dtsi | 3 ++- arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 3 ++- drivers/dma/sf-pdma/sf-pdma.c | 24 ++++++++++++------- drivers/dma/sf-pdma/sf-pdma.h | 8 ++----- 5 files changed, 39 insertions(+), 18 deletions(-)