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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BBE7C43387 for ; Wed, 16 Jan 2019 17:11:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B84020651 for ; Wed, 16 Jan 2019 17:11:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="kOB1Q123" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405841AbfAPRLZ (ORCPT ); Wed, 16 Jan 2019 12:11:25 -0500 Received: from mail-pl1-f195.google.com ([209.85.214.195]:39080 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394478AbfAPRKr (ORCPT ); Wed, 16 Jan 2019 12:10:47 -0500 Received: by mail-pl1-f195.google.com with SMTP id 101so3297009pld.6 for ; Wed, 16 Jan 2019 09:10:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=pJa/3xt1JMxzSbHyVab2zd3RhWbY439V9Orw9mFVXdA=; b=kOB1Q123vSecSRTJ06CsqyBuW9/HImrhm3MqYY0doaB11TP2Dvk+npnTSqQsTfnRcW mTe1bbiGHRs4vn+edG0CtmnyPCzVa6hRASQjKRNBQD5vUqJzCSfGsxe7g9I+sZPV16Hd 3hEdg0wcrJKS+17GRjAwcC1qKLl6RGEh06c3I= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pJa/3xt1JMxzSbHyVab2zd3RhWbY439V9Orw9mFVXdA=; b=dFTwUyvkK+JqfVRFXbAXsdx3Q+yx0Doj0e4X5n5UG09Z4fhhxapfgQoke3evtTOAvF jHMEPgEpUY85zQAmmOIfMqk3HScFHUZzJKQsU4zTVOFcmnb9NCXu741uLZFnBn96WJGB W/dYYBNiEHWYdVPqkVjs6/ITZWjO0VxIxMQOyuGtwydNIf6os4494b/Iu8HxAbMI10AW Kv4vEd3CvGn+T+eDFpaYIh7rwZdtV+26lIdSmt7OQESL6z6HpJfirGtfCYMAQqNgoojy jeoGKnn3CPC4xUtC+thW05GuGZAcnscL10ktZBz8/Jsk7VpX9QZrZjDGjet5fcBaKkAv C7cw== X-Gm-Message-State: AJcUukd9tFDiGZU4iZ4iMxHPlFUqj9yAKP5jCb7+6zR6psZsKku8gImZ 8AXZ4tW5mIF1UuCFWxg33YeN5rfVHV/d1A== X-Google-Smtp-Source: ALg8bN53UVr90AHvPfr8dtUoE+UjK3twxa1QIy9kliJAMjdXVHiYMuFJ2I9wblt0BFdSy8YMh/khfA== X-Received: by 2002:a17:902:2a0a:: with SMTP id i10mr10713001plb.323.1547658646183; Wed, 16 Jan 2019 09:10:46 -0800 (PST) Received: from localhost.localdomain ([2601:1c2:680:1319:4e72:b9ff:fe99:466a]) by smtp.gmail.com with ESMTPSA id h129sm17914023pfb.110.2019.01.16.09.10.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 16 Jan 2019 09:10:44 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Vinod Koul , Rob Herring , Mark Rutland , Tanglei Han , Zhuangluan Su , Ryan Grachek , Manivannan Sadhasivam , dmaengine@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 2/8 v4] Documentation: bindings: dma: Add binding for dma-channel-mask Date: Wed, 16 Jan 2019 09:10:23 -0800 Message-Id: <1547658629-25378-3-git-send-email-john.stultz@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1547658629-25378-1-git-send-email-john.stultz@linaro.org> References: <1547658629-25378-1-git-send-email-john.stultz@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some dma channels can be reserved for secure mode or other hardware on the SoC, so provide a binding for a bitmask listing the available channels for the kernel to use. This follows the pre-existing bcm,dma-channel-mask binding. Cc: Vinod Koul Cc: Rob Herring Cc: Mark Rutland Cc: Tanglei Han Cc: Zhuangluan Su Cc: Ryan Grachek Cc: Manivannan Sadhasivam Cc: dmaengine@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: John Stultz --- v3: Renamed to hisi-dma-avail-chan v4: Reworked to generic dma-channel-mask --- Documentation/devicetree/bindings/dma/dma.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/dma.txt b/Documentation/devicetree/bindings/dma/dma.txt index 6312fb0..eeb4e4d 100644 --- a/Documentation/devicetree/bindings/dma/dma.txt +++ b/Documentation/devicetree/bindings/dma/dma.txt @@ -16,6 +16,9 @@ Optional properties: - dma-channels: Number of DMA channels supported by the controller. - dma-requests: Number of DMA request signals supported by the controller. +- dma-channel-mask: Bitmask of available DMA channels in ascending order + that are not reserved by firmware and are available to + the kernel. i.e. first channel corresponds to LSB. Example: @@ -29,6 +32,7 @@ Example: #dma-cells = <1>; dma-channels = <32>; dma-requests = <127>; + dma-channel-mask = <0xfffe> }; * DMA router -- 2.7.4