| Message ID | 20181112080557.22698-2-bjorn.andersson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Qualcomm AOSS QMP side channel binding and driver | expand |
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@linaro.org> > --- > .../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
Hi, On Mon, Nov 12, 2018 at 12:02 AM Bjorn Andersson <bjorn.andersson@linaro.org> wrote: > + aoss_qmp: qmp@c300000 { > + compatible = "qcom,sdm845-aoss-qmp"; > + reg = <0x0c300000 0x100000>; drive-by nit: s/0x0c300000/0xc300000 ...another random suggestion is that I think Rob H. has been requesting that examples have the #include in them... -Doug
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. + +- 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 + += EXAMPLE + +The following example represents the AOSS side-channel message RAM and the +mechanism exposing the power-domains, as found in SDM845. + + aoss_qmp: qmp@c300000 { + compatible = "qcom,sdm845-aoss-qmp"; + reg = <0x0c300000 0x100000>; + interrupts = <GIC_SPI 389 IRQ_TYPE_EDGE_RISING>; + + mboxes = <&apss_shared 0>; + + aoss_qmp_pd: power-controller { + compatible = "qcom,sdm845-aoss-qmp-pd"; + #power-domain-cells = <1>; + }; + }; diff --git a/include/dt-bindings/power/qcom-aoss-qmp.h b/include/dt-bindings/power/qcom-aoss-qmp.h new file mode 100644 index 000000000000..7d8ac1a4f90c --- /dev/null +++ b/include/dt-bindings/power/qcom-aoss-qmp.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018, Linaro Ltd. */ + +#ifndef __DT_BINDINGS_POWER_QCOM_AOSS_QMP_H +#define __DT_BINDINGS_POWER_QCOM_AOSS_QMP_H + +#define AOSS_QMP_QDSS_CLK 0 +#define AOSS_QMP_LS_CDSP 1 +#define AOSS_QMP_LS_LPASS 2 +#define AOSS_QMP_LS_MODEM 3 +#define AOSS_QMP_LS_SLPI 4 +#define AOSS_QMP_LS_SPSS 5 +#define AOSS_QMP_LS_VENUS 6 + +#endif
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@linaro.org> --- .../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 -- 2.18.0