diff options
author | Bjorn Andersson <bjorn.andersson@sonymobile.com> | 2014-09-25 15:05:21 -0700 |
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committer | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2015-09-01 09:22:00 +0100 |
commit | 859c0b3b96cd9983b5243e45e2371d1b0c360f44 (patch) | |
tree | 6884055152cdb14b4a0563dcf1acafabfbbf5fc9 | |
parent | 81bd9af40ecc2c89c460045dbef49b90bd8316bb (diff) |
soc: qcom: Add device tree binding for SMEM
Add device tree binding documentation for the Qualcom Shared Memory
Manager.
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
-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..19cad6cc427c --- /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@fa00000 { + compatible = "qcom,smem"; + + memory-region = <&smem_region>; + reg = <0xfc428000 0x4000>; + + hwlocks = <&tcsr_mutex 3>; + }; |