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83 lines
2.2 KiB
Diff
83 lines
2.2 KiB
Diff
Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [v2,1/2] soc: qcom: Add device tree binding for SMEM
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From: Bjorn Andersson <bjorn.andersson@sonymobile.com>
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X-Patchwork-Id: 6202201
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Message-Id: <1428795178-24312-1-git-send-email-bjorn.andersson@sonymobile.com>
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To: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
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Mark Rutland <mark.rutland@arm.com>,
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Ian Campbell <ijc+devicetree@hellion.org.uk>,
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Kumar Gala <galak@codeaurora.org>, Jeffrey Hugo <jhugo@codeaurora.org>,
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Andry Gross <agross@codeaurora.org>
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Cc: <devicetree@vger.kernel.org>,
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linux-arm-msm <linux-arm-msm@vger.kernel.org>,
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<linux-kernel@vger.kernel.org>
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Date: Sat, 11 Apr 2015 16:32:57 -0700
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Add device tree binding documentation for the Qualcom Shared Memory
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manager.
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Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
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---
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Changes since v1:
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- None
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.../devicetree/bindings/soc/qcom/qcom,smem.txt | 49 ++++++++++++++++++++++
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1 file changed, 49 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt
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@@ -0,0 +1,49 @@
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+Qualcomm Shared Memory binding
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+
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+This binding describes the Qualcomm Shared Memory, used to share data between
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+various subsystems and OSes in Qualcomm platforms.
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+
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+- compatible:
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+ Usage: required
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+ Value type: <stringlist>
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+ Definition: must be:
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+ "qcom,smem"
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+
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+- memory-region:
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+ Usage: required
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+ Value type: <prop-encoded-array>
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+ Definition: handle to memory reservation for main smem memory region.
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+
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+- reg:
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+ Usage: optional
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+ Value type: <prop-encoded-array>
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+ Definition: base address and size pair for any additional memory areas
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+ of the shared memory.
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+
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+- hwspinlocks:
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+ Usage: required
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+ Value type: <prop-encoded-array>
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+ Definition: reference to a hwspinlock used to protect allocations from
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+ the shared memory
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+
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+= EXAMPLE
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+
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+ reserved-memory {
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+ ranges;
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+
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+ smem_region: smem@fa00000 {
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+ reg = <0xfa00000 0x200000>;
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+ no-map;
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+ };
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+ };
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+
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+ smem@fa00000 {
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+ compatible = "qcom,smem";
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+
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+ memory-region = <&smem_region>;
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+ reg = <0xfc428000 0x4000>;
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+
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+ hwlocks = <&tcsr_mutex 3>;
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+ };
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