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Qualcomm Shared Memory Manager binding
This binding describes the Qualcomm Shared Memory Manager, 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.
- qcom,rpm-msg-ram:
Usage: required
Value type: <prop-encoded-array>
Definition: handle to RPM message memory resource
- hwlocks:
Usage: required
Value type: <prop-encoded-array>
Definition: reference to a hwspinlock used to protect allocations from
the shared memory
= EXAMPLE
The following example shows the SMEM setup for MSM8974, with a main SMEM region
at 0xfa00000 and the RPM message ram at 0xfc428000:
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>;
qcom,rpm-msg-ram = <&rpm_msg_ram>;
hwlocks = <&tcsr_mutex 3>;
};
soc {
rpm_msg_ram: memory@fc428000 {
compatible = "qcom,rpm-msg-ram";
reg = <0xfc428000 0x4000>;
};
};
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