Qualcomm Shared Memory Manager binding
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This binding describes the Qualcomm Shared Memory Manager, used to share data
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between various subsystems and OSes in Qualcomm platforms.
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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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- 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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- qcom,rpm-msg-ram:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: handle to RPM message memory resource
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- hwlocks:
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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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= EXAMPLE
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The following example shows the SMEM setup for MSM8974, with a main SMEM region
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at 0xfa00000 and the RPM message ram at 0xfc428000:
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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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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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smem@fa00000 {
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compatible = "qcom,smem";
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memory-region = <&smem_region>;
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qcom,rpm-msg-ram = <&rpm_msg_ram>;
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hwlocks = <&tcsr_mutex 3>;
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};
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soc {
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rpm_msg_ram: memory@fc428000 {
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compatible = "qcom,rpm-msg-ram";
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reg = <0xfc428000 0x4000>;
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};
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};
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