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