On Mon, Nov 12, 2018 at 12:05:55AM -0800, Bjorn Andersson wrote: > Add binding for the QMP based side-channel communication mechanism to > the AOSS, which is used to control resources not exposed through the > RPMh interface. > > Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> > --- > .../bindings/soc/qcom/qcom,aoss-qmp.txt | 63 +++++++++++++++++++ > include/dt-bindings/power/qcom-aoss-qmp.h | 15 +++++ > 2 files changed, 78 insertions(+) > create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt > create mode 100644 include/dt-bindings/power/qcom-aoss-qmp.h > > diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt > new file mode 100644 > index 000000000000..e3c8cb4372f2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt > @@ -0,0 +1,63 @@ > +Qualcomm Always-On Subsystem side channel binding > + > +This binding describes the hardware component responsible for side channel > +requests to the always-on subsystem (AOSS), used for certain power management > +requests that is not handled by the standard RPMh interface. Each client in the > +SoC has it's own block of message RAM and IRQ for communication with the AOSS. > +The protocol used to communicate in the message RAM is known as QMP. > + > +- compatible: > + Usage: required > + Value type: <string> > + Definition: must be "qcom,sdm845-aoss-qmp" > + > +- reg: > + Usage: required > + Value type: <prop-encoded-array> > + Definition: the base address and size of the message RAM for this > + client's communication with the AOSS > + > +- interrupts: > + Usage: required > + Value type: <prop-encoded-array> > + Definition: should specify the AOSS message IRQ for this client > + > +- mboxes: > + Usage: required > + Value type: <prop-encoded-array> > + Definition: reference to the mailbox representing the outgoing doorbell > + in APCS for this client, as described in mailbox/mailbox.txt > + > += AOSS Power-domains > +The AOSS side channel exposes control over a set of resources, used to control > +a set of debug related clocks and to affect the low power state of resources > +related to the secondary subsystems. These resources are described as a set of > +power-domains in a subnode of hte AOSS side channel node. Why does this need to be a sub-node? Are there other sub-nodes needed? > + > +- compatible: > + Usage: required > + Value type: <string> > + Definition: must be "qcom,sdm845-aoss-qmp-pd" > + > +- #power-domain-cells: > + Usage: required > + Value type: <u32> > + Definition: must be 1
