Messages in this thread | | | Date | Thu, 23 Apr 2015 14:01:28 -0600 | From | Jeffrey Hugo <> | Subject | Re: [PATCH v2 1/2] soc: qcom: Add device tree binding for SMEM |
| |
On 4/11/2015 5:32 PM, Bjorn Andersson wrote: > Add device tree binding documentation for the Qualcom Shared Memory > manager. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> > --- > > 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 > > 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 0000000..d90f839 > --- /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: <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. > + > +- hwspinlocks: > + Usage: required > + Value type: <prop-encoded-array> > + 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>; > + }; >
For my information, is there any intention to support the relocatable smem_region by looking it up at init time? It does not seem like it would be possible to support that with this binding.
-- Jeffrey Hugo Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
| |