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author | Stephen Rothwell <sfr@canb.auug.org.au> | 2015-09-22 10:11:50 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2015-09-22 10:11:50 +1000 |
commit | 5f8005875b51b7d8faa0e8cfd94748951a8a1fa7 (patch) | |
tree | 3d4109d117dc7ba54c518d4cd9e8f429746f4c32 /Documentation | |
parent | d3452f85df3b566a6f24b1afd379aacb4833fef6 (diff) | |
parent | 75a53fc62c52b01bf03df3aa01bc55485982bb4b (diff) |
Merge remote-tracking branch 'qcom/qcom/for-next'
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt | 51 |
1 files changed, 51 insertions, 0 deletions
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 000000000000..ee1e7d55f11b --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt @@ -0,0 +1,51 @@ +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. + +- reg: + Usage: optional + Value type: <prop-encoded-array> + Definition: base address and size pair for any additional memory areas + of the shared memory. + +- 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 an auxiliary region at 0xfc428000: + + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + smem_region: smem@fa00000 { + reg = <0xfa00000 0x200000>; + no-map; + }; + }; + + smem@fc428000 { + compatible = "qcom,smem"; + + memory-region = <&smem_region>; + reg = <0xfc428000 0x4000>; + + hwlocks = <&tcsr_mutex 3>; + }; |