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[209.85.220.65]) by mx.google.com with SMTPS id 33sor10208224pla.60.2019.01.16.09.10.46 for (Google Transport Security); Wed, 16 Jan 2019 09:10:46 -0800 (PST) Received-SPF: pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=kOB1Q123; spf=pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org 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=mJx+tFRjkImhgLmxxpup53Fzw9+QF69cwCj5b2vt+MzDZZ77ZSRLgr2peyQ3NU5mBz SR2NFrPw/Gw/AtyX7hvN/J5RvlN+QCBneWD1xPcKgFdH8HEubqo141eClww/2HSEgcqW ypM5P7x9X1z/w6VGMI5Quz8gGHuFJGZ75yfxlOjAyDygJEu0dBA3uNuO/wd4A+lA5Lzd PPcsmIdmQjAALAn++P+ymRVLWttvZV4wIVebjVKhGhRGt00PCIs7TzU8VV9KYGCOaMG/ ymxdsxiTw4hwTF7KLHeuX67lU8Trp8uLcM3W207fkb+w18V6MI63ImKNBXPHYlUg3AHl HY2w== X-Gm-Message-State: AJcUukcke91vd9Z1+mxj8PFg7+cewUFUL4zHT2EEEhT/yzBRy360b5Jh qzZgdSUfZyEmmp46DrA3A4ewUyqu 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) Return-Path: 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> 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(+) -- 2.7.4 Reviewed-by: Rob Herring 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