On 4/11/2015 5:32 PM, Bjorn Andersson wrote:
Add device tree binding documentation for the Qualcom Shared Memory
manager.
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
---
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
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt
new file mode 100644
index 0000000..d90f839
--- /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>;
Just noticed, this looks like a typo. The description of the field
above calls it "hwspinlocks". Would to please determine which of the
two labels you most prefer, and change things so that label is used in
both the description and the example? Thanks
+ };
--
Jeffrey Hugo
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
Forum, a Linux Foundation Collaborative Project
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