Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v2,1/2] soc: qcom: Add device tree binding for SMEM From: Bjorn Andersson X-Patchwork-Id: 6202201 Message-Id: <1428795178-24312-1-git-send-email-bjorn.andersson@sonymobile.com> To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Jeffrey Hugo , Andry Gross Cc: , linux-arm-msm , Date: Sat, 11 Apr 2015 16:32:57 -0700 Add device tree binding documentation for the Qualcom Shared Memory manager. Signed-off-by: Bjorn Andersson --- 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 --- /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: + Definition: must be: + "qcom,smem" + +- memory-region: + Usage: required + Value type: + Definition: handle to memory reservation for main smem memory region. + +- reg: + Usage: optional + Value type: + Definition: base address and size pair for any additional memory areas + of the shared memory. + +- hwspinlocks: + Usage: required + Value type: + 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>; + };